* [PATCH 1/6] tests/qtest: Add npcm7xx timer test
2020-10-08 23:21 [PATCH 0/6] Additional NPCM7xx features, devices and tests Havard Skinnemoen via
@ 2020-10-08 23:21 ` Havard Skinnemoen via
2020-10-08 23:21 ` [PATCH 2/6] Move npcm7xx_timer_reached_zero call out of npcm7xx_timer_pause Havard Skinnemoen via
` (5 subsequent siblings)
6 siblings, 0 replies; 14+ messages in thread
From: Havard Skinnemoen via @ 2020-10-08 23:21 UTC (permalink / raw)
To: qemu-devel
Cc: qemu-arm, peter.maydell, Avi.Fishman, kfting, f4bug, clg,
Havard Skinnemoen
This test exercises the various modes of the npcm7xx timer. In
particular, it triggers the bug found by the fuzzer, as reported here:
https://lists.gnu.org/archive/html/qemu-devel/2020-09/msg02992.html
It also found several other bugs, especially related to interrupt
handling.
The test exercises all the timers in all the timer modules, which
expands to 180 test cases in total.
Reviewed-by: Tyrone Ting <kfting@nuvoton.com>
Signed-off-by: Havard Skinnemoen <hskinnemoen@google.com>
---
tests/qtest/npcm7xx_timer-test.c | 562 +++++++++++++++++++++++++++++++
tests/qtest/meson.build | 1 +
2 files changed, 563 insertions(+)
create mode 100644 tests/qtest/npcm7xx_timer-test.c
diff --git a/tests/qtest/npcm7xx_timer-test.c b/tests/qtest/npcm7xx_timer-test.c
new file mode 100644
index 0000000000..f08b0cd62a
--- /dev/null
+++ b/tests/qtest/npcm7xx_timer-test.c
@@ -0,0 +1,562 @@
+/*
+ * QTest testcase for the Nuvoton NPCM7xx Timer
+ *
+ * Copyright 2020 Google LLC
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License as published by the
+ * Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
+ * for more details.
+ */
+
+#include "qemu/osdep.h"
+#include "qemu/timer.h"
+#include "libqtest-single.h"
+
+#define TIM_REF_HZ (25000000)
+
+/* Bits in TCSRx */
+#define CEN BIT(30)
+#define IE BIT(29)
+#define MODE_ONESHOT (0 << 27)
+#define MODE_PERIODIC (1 << 27)
+#define CRST BIT(26)
+#define CACT BIT(25)
+#define PRESCALE(x) (x)
+
+/* Registers shared between all timers in a module. */
+#define TISR 0x18
+#define WTCR 0x1c
+# define WTCLK(x) ((x) << 10)
+
+/* Power-on default; used to re-initialize timers before each test. */
+#define TCSR_DEFAULT PRESCALE(5)
+
+/* Register offsets for a timer within a timer block. */
+typedef struct Timer {
+ unsigned int tcsr_offset;
+ unsigned int ticr_offset;
+ unsigned int tdr_offset;
+} Timer;
+
+/* A timer block containing 5 timers. */
+typedef struct TimerBlock {
+ int irq_base;
+ uint64_t base_addr;
+} TimerBlock;
+
+/* Testdata for testing a particular timer within a timer block. */
+typedef struct TestData {
+ const TimerBlock *tim;
+ const Timer *timer;
+} TestData;
+
+const TimerBlock timer_block[] = {
+ {
+ .irq_base = 32,
+ .base_addr = 0xf0008000,
+ },
+ {
+ .irq_base = 37,
+ .base_addr = 0xf0009000,
+ },
+ {
+ .irq_base = 42,
+ .base_addr = 0xf000a000,
+ },
+};
+
+const Timer timer[] = {
+ {
+ .tcsr_offset = 0x00,
+ .ticr_offset = 0x08,
+ .tdr_offset = 0x10,
+ }, {
+ .tcsr_offset = 0x04,
+ .ticr_offset = 0x0c,
+ .tdr_offset = 0x14,
+ }, {
+ .tcsr_offset = 0x20,
+ .ticr_offset = 0x28,
+ .tdr_offset = 0x30,
+ }, {
+ .tcsr_offset = 0x24,
+ .ticr_offset = 0x2c,
+ .tdr_offset = 0x34,
+ }, {
+ .tcsr_offset = 0x40,
+ .ticr_offset = 0x48,
+ .tdr_offset = 0x50,
+ },
+};
+
+/* Returns the index of the timer block. */
+static int tim_index(const TimerBlock *tim)
+{
+ ptrdiff_t diff = tim - timer_block;
+
+ g_assert(diff >= 0 && diff < ARRAY_SIZE(timer_block));
+
+ return diff;
+}
+
+/* Returns the index of a timer within a timer block. */
+static int timer_index(const Timer *t)
+{
+ ptrdiff_t diff = t - timer;
+
+ g_assert(diff >= 0 && diff < ARRAY_SIZE(timer));
+
+ return diff;
+}
+
+/* Returns the irq line for a given timer. */
+static int tim_timer_irq(const TestData *td)
+{
+ return td->tim->irq_base + timer_index(td->timer);
+}
+
+/* Register read/write accessors. */
+
+static void tim_write(const TestData *td,
+ unsigned int offset, uint32_t value)
+{
+ writel(td->tim->base_addr + offset, value);
+}
+
+static uint32_t tim_read(const TestData *td, unsigned int offset)
+{
+ return readl(td->tim->base_addr + offset);
+}
+
+static void tim_write_tcsr(const TestData *td, uint32_t value)
+{
+ tim_write(td, td->timer->tcsr_offset, value);
+}
+
+static uint32_t tim_read_tcsr(const TestData *td)
+{
+ return tim_read(td, td->timer->tcsr_offset);
+}
+
+static void tim_write_ticr(const TestData *td, uint32_t value)
+{
+ tim_write(td, td->timer->ticr_offset, value);
+}
+
+static uint32_t tim_read_ticr(const TestData *td)
+{
+ return tim_read(td, td->timer->ticr_offset);
+}
+
+static uint32_t tim_read_tdr(const TestData *td)
+{
+ return tim_read(td, td->timer->tdr_offset);
+}
+
+/* Returns the number of nanoseconds to count the given number of cycles. */
+static int64_t tim_calculate_step(uint32_t count, uint32_t prescale)
+{
+ return (1000000000LL / TIM_REF_HZ) * count * (prescale + 1);
+}
+
+/* Returns a bitmask corresponding to the timer under test. */
+static uint32_t tim_timer_bit(const TestData *td)
+{
+ return BIT(timer_index(td->timer));
+}
+
+/* Resets all timers to power-on defaults. */
+static void tim_reset(const TestData *td)
+{
+ int i, j;
+
+ /* Reset all the timers, in case a previous test left a timer running. */
+ for (i = 0; i < ARRAY_SIZE(timer_block); i++) {
+ for (j = 0; j < ARRAY_SIZE(timer); j++) {
+ writel(timer_block[i].base_addr + timer[j].tcsr_offset,
+ CRST | TCSR_DEFAULT);
+ }
+ writel(timer_block[i].base_addr + TISR, -1);
+ }
+}
+
+/* Verifies the reset state of a timer. */
+static void test_reset(gconstpointer test_data)
+{
+ const TestData *td = test_data;
+
+ tim_reset(td);
+
+ g_assert_cmphex(tim_read_tcsr(td), ==, TCSR_DEFAULT);
+ g_assert_cmphex(tim_read_ticr(td), ==, 0);
+ g_assert_cmphex(tim_read_tdr(td), ==, 0);
+ g_assert_cmphex(tim_read(td, TISR), ==, 0);
+ g_assert_cmphex(tim_read(td, WTCR), ==, WTCLK(1));
+}
+
+/* Verifies that CRST wins if both CEN and CRST are set. */
+static void test_reset_overrides_enable(gconstpointer test_data)
+{
+ const TestData *td = test_data;
+
+ tim_reset(td);
+
+ /* CRST should force CEN to 0 */
+ tim_write_tcsr(td, CEN | CRST | TCSR_DEFAULT);
+
+ g_assert_cmphex(tim_read_tcsr(td), ==, TCSR_DEFAULT);
+ g_assert_cmphex(tim_read_tdr(td), ==, 0);
+ g_assert_cmphex(tim_read(td, TISR), ==, 0);
+}
+
+/* Verifies the behavior when CEN is set and then cleared. */
+static void test_oneshot_enable_then_disable(gconstpointer test_data)
+{
+ const TestData *td = test_data;
+
+ tim_reset(td);
+
+ /* Enable the timer with zero initial count, then disable it again. */
+ tim_write_tcsr(td, CEN | TCSR_DEFAULT);
+ tim_write_tcsr(td, TCSR_DEFAULT);
+
+ g_assert_cmphex(tim_read_tcsr(td), ==, TCSR_DEFAULT);
+ g_assert_cmphex(tim_read_tdr(td), ==, 0);
+ /* Timer interrupt flag should be set, but interrupts are not enabled. */
+ g_assert_cmphex(tim_read(td, TISR), ==, tim_timer_bit(td));
+ g_assert_false(qtest_get_irq(global_qtest, tim_timer_irq(td)));
+}
+
+/* Verifies that a one-shot timer fires when expected with prescaler 5. */
+static void test_oneshot_ps5(gconstpointer test_data)
+{
+ const TestData *td = test_data;
+ unsigned int count = 256;
+ unsigned int ps = 5;
+
+ tim_reset(td);
+
+ tim_write_ticr(td, count);
+ tim_write_tcsr(td, CEN | PRESCALE(ps));
+ g_assert_cmphex(tim_read_tcsr(td), ==, CEN | CACT | PRESCALE(ps));
+ g_assert_cmpuint(tim_read_tdr(td), ==, count);
+
+ clock_step(tim_calculate_step(count, ps) - 1);
+
+ g_assert_cmphex(tim_read_tcsr(td), ==, CEN | CACT | PRESCALE(ps));
+ g_assert_cmpuint(tim_read_tdr(td), <, count);
+ g_assert_cmphex(tim_read(td, TISR), ==, 0);
+
+ clock_step(1);
+
+ g_assert_cmphex(tim_read_tcsr(td), ==, PRESCALE(ps));
+ g_assert_cmpuint(tim_read_tdr(td), ==, count);
+ g_assert_cmphex(tim_read(td, TISR), ==, tim_timer_bit(td));
+ g_assert_false(qtest_get_irq(global_qtest, tim_timer_irq(td)));
+
+ /* Clear the interrupt flag. */
+ tim_write(td, TISR, tim_timer_bit(td));
+ g_assert_cmphex(tim_read(td, TISR), ==, 0);
+ g_assert_false(qtest_get_irq(global_qtest, tim_timer_irq(td)));
+
+ /* Verify that this isn't a periodic timer. */
+ clock_step(2 * tim_calculate_step(count, ps));
+ g_assert_cmphex(tim_read(td, TISR), ==, 0);
+ g_assert_false(qtest_get_irq(global_qtest, tim_timer_irq(td)));
+}
+
+/* Verifies that a one-shot timer fires when expected with prescaler 0. */
+static void test_oneshot_ps0(gconstpointer test_data)
+{
+ const TestData *td = test_data;
+ unsigned int count = 1;
+ unsigned int ps = 0;
+
+ tim_reset(td);
+
+ tim_write_ticr(td, count);
+ tim_write_tcsr(td, CEN | PRESCALE(ps));
+ g_assert_cmphex(tim_read_tcsr(td), ==, CEN | CACT | PRESCALE(ps));
+ g_assert_cmpuint(tim_read_tdr(td), ==, count);
+
+ clock_step(tim_calculate_step(count, ps) - 1);
+
+ g_assert_cmphex(tim_read_tcsr(td), ==, CEN | CACT | PRESCALE(ps));
+ g_assert_cmpuint(tim_read_tdr(td), <, count);
+ g_assert_cmphex(tim_read(td, TISR), ==, 0);
+
+ clock_step(1);
+
+ g_assert_cmphex(tim_read_tcsr(td), ==, PRESCALE(ps));
+ g_assert_cmpuint(tim_read_tdr(td), ==, count);
+ g_assert_cmphex(tim_read(td, TISR), ==, tim_timer_bit(td));
+ g_assert_false(qtest_get_irq(global_qtest, tim_timer_irq(td)));
+}
+
+/* Verifies that a one-shot timer fires when expected with highest prescaler. */
+static void test_oneshot_ps255(gconstpointer test_data)
+{
+ const TestData *td = test_data;
+ unsigned int count = (1U << 24) - 1;
+ unsigned int ps = 255;
+
+ tim_reset(td);
+
+ tim_write_ticr(td, count);
+ tim_write_tcsr(td, CEN | PRESCALE(ps));
+ g_assert_cmphex(tim_read_tcsr(td), ==, CEN | CACT | PRESCALE(ps));
+ g_assert_cmpuint(tim_read_tdr(td), ==, count);
+
+ clock_step(tim_calculate_step(count, ps) - 1);
+
+ g_assert_cmphex(tim_read_tcsr(td), ==, CEN | CACT | PRESCALE(ps));
+ g_assert_cmpuint(tim_read_tdr(td), <, count);
+ g_assert_cmphex(tim_read(td, TISR), ==, 0);
+
+ clock_step(1);
+
+ g_assert_cmphex(tim_read_tcsr(td), ==, PRESCALE(ps));
+ g_assert_cmpuint(tim_read_tdr(td), ==, count);
+ g_assert_cmphex(tim_read(td, TISR), ==, tim_timer_bit(td));
+ g_assert_false(qtest_get_irq(global_qtest, tim_timer_irq(td)));
+}
+
+/* Verifies that a oneshot timer fires an interrupt when expected. */
+static void test_oneshot_interrupt(gconstpointer test_data)
+{
+ const TestData *td = test_data;
+ unsigned int count = 256;
+ unsigned int ps = 7;
+
+ tim_reset(td);
+
+ tim_write_ticr(td, count);
+ tim_write_tcsr(td, IE | CEN | MODE_ONESHOT | PRESCALE(ps));
+
+ clock_step_next();
+
+ g_assert_cmphex(tim_read(td, TISR), ==, tim_timer_bit(td));
+ g_assert_true(qtest_get_irq(global_qtest, tim_timer_irq(td)));
+}
+
+/*
+ * Verifies that the timer can be paused and later resumed, and it still fires
+ * at the right moment.
+ */
+static void test_pause_resume(gconstpointer test_data)
+{
+ const TestData *td = test_data;
+ unsigned int count = 256;
+ unsigned int ps = 1;
+
+ tim_reset(td);
+
+ tim_write_ticr(td, count);
+ tim_write_tcsr(td, IE | CEN | MODE_ONESHOT | PRESCALE(ps));
+
+ /* Pause the timer halfway to expiration. */
+ clock_step(tim_calculate_step(count / 2, ps));
+ tim_write_tcsr(td, IE | MODE_ONESHOT | PRESCALE(ps));
+ g_assert_cmpuint(tim_read_tdr(td), ==, count / 2);
+
+ /* Counter should not advance during the following step. */
+ clock_step(2 * tim_calculate_step(count, ps));
+ g_assert_cmpuint(tim_read_tdr(td), ==, count / 2);
+ g_assert_cmphex(tim_read(td, TISR), ==, 0);
+ g_assert_false(qtest_get_irq(global_qtest, tim_timer_irq(td)));
+
+ /* Resume the timer and run _almost_ to expiration. */
+ tim_write_tcsr(td, IE | CEN | MODE_ONESHOT | PRESCALE(ps));
+ clock_step(tim_calculate_step(count / 2, ps) - 1);
+ g_assert_cmpuint(tim_read_tdr(td), <, count);
+ g_assert_cmphex(tim_read(td, TISR), ==, 0);
+ g_assert_false(qtest_get_irq(global_qtest, tim_timer_irq(td)));
+
+ /* Now, run the rest of the way and verify that the interrupt fires. */
+ clock_step(1);
+ g_assert_cmphex(tim_read(td, TISR), ==, tim_timer_bit(td));
+ g_assert_true(qtest_get_irq(global_qtest, tim_timer_irq(td)));
+}
+
+/* Verifies that the prescaler can be changed while the timer is runnin. */
+static void test_prescaler_change(gconstpointer test_data)
+{
+ const TestData *td = test_data;
+ unsigned int count = 256;
+ unsigned int ps = 5;
+
+ tim_reset(td);
+
+ tim_write_ticr(td, count);
+ tim_write_tcsr(td, CEN | MODE_ONESHOT | PRESCALE(ps));
+
+ /* Run a quarter of the way, and change the prescaler. */
+ clock_step(tim_calculate_step(count / 4, ps));
+ g_assert_cmpuint(tim_read_tdr(td), ==, 3 * count / 4);
+ ps = 2;
+ tim_write_tcsr(td, CEN | MODE_ONESHOT | PRESCALE(ps));
+ /* The counter must not change. */
+ g_assert_cmpuint(tim_read_tdr(td), ==, 3 * count / 4);
+
+ /* Run another quarter of the way, and change the prescaler again. */
+ clock_step(tim_calculate_step(count / 4, ps));
+ g_assert_cmpuint(tim_read_tdr(td), ==, count / 2);
+ ps = 8;
+ tim_write_tcsr(td, CEN | MODE_ONESHOT | PRESCALE(ps));
+ /* The counter must not change. */
+ g_assert_cmpuint(tim_read_tdr(td), ==, count / 2);
+
+ /* Run another quarter of the way, and change the prescaler again. */
+ clock_step(tim_calculate_step(count / 4, ps));
+ g_assert_cmpuint(tim_read_tdr(td), ==, count / 4);
+ ps = 0;
+ tim_write_tcsr(td, CEN | MODE_ONESHOT | PRESCALE(ps));
+ /* The counter must not change. */
+ g_assert_cmpuint(tim_read_tdr(td), ==, count / 4);
+
+ /* Run almost to expiration, and verify the timer didn't fire yet. */
+ clock_step(tim_calculate_step(count / 4, ps) - 1);
+ g_assert_cmpuint(tim_read_tdr(td), <, count);
+ g_assert_cmphex(tim_read(td, TISR), ==, 0);
+
+ /* Now, run the rest of the way and verify that the timer fires. */
+ clock_step(1);
+ g_assert_cmphex(tim_read(td, TISR), ==, tim_timer_bit(td));
+}
+
+/* Verifies that a periodic timer automatically restarts after expiration. */
+static void test_periodic_no_interrupt(gconstpointer test_data)
+{
+ const TestData *td = test_data;
+ unsigned int count = 2;
+ unsigned int ps = 3;
+ int i;
+
+ tim_reset(td);
+
+ tim_write_ticr(td, count);
+ tim_write_tcsr(td, CEN | MODE_PERIODIC | PRESCALE(ps));
+
+ for (i = 0; i < 4; i++) {
+ clock_step_next();
+
+ g_assert_cmphex(tim_read(td, TISR), ==, tim_timer_bit(td));
+ g_assert_false(qtest_get_irq(global_qtest, tim_timer_irq(td)));
+
+ tim_write(td, TISR, tim_timer_bit(td));
+
+ g_assert_cmphex(tim_read(td, TISR), ==, 0);
+ g_assert_false(qtest_get_irq(global_qtest, tim_timer_irq(td)));
+ }
+}
+
+/* Verifies that a periodict timer fires an interrupt every time it expires. */
+static void test_periodic_interrupt(gconstpointer test_data)
+{
+ const TestData *td = test_data;
+ unsigned int count = 65535;
+ unsigned int ps = 2;
+ int i;
+
+ tim_reset(td);
+
+ tim_write_ticr(td, count);
+ tim_write_tcsr(td, CEN | IE | MODE_PERIODIC | PRESCALE(ps));
+
+ for (i = 0; i < 4; i++) {
+ clock_step_next();
+
+ g_assert_cmphex(tim_read(td, TISR), ==, tim_timer_bit(td));
+ g_assert_true(qtest_get_irq(global_qtest, tim_timer_irq(td)));
+
+ tim_write(td, TISR, tim_timer_bit(td));
+
+ g_assert_cmphex(tim_read(td, TISR), ==, 0);
+ g_assert_false(qtest_get_irq(global_qtest, tim_timer_irq(td)));
+ }
+}
+
+/*
+ * Verifies that the timer behaves correctly when disabled right before and
+ * exactly when it's supposed to expire.
+ */
+static void test_disable_on_expiration(gconstpointer test_data)
+{
+ const TestData *td = test_data;
+ unsigned int count = 8;
+ unsigned int ps = 255;
+
+ tim_reset(td);
+
+ tim_write_ticr(td, count);
+ tim_write_tcsr(td, CEN | MODE_ONESHOT | PRESCALE(ps));
+
+ clock_step(tim_calculate_step(count, ps) - 1);
+
+ tim_write_tcsr(td, MODE_ONESHOT | PRESCALE(ps));
+ tim_write_tcsr(td, CEN | MODE_ONESHOT | PRESCALE(ps));
+ clock_step(1);
+ tim_write_tcsr(td, MODE_ONESHOT | PRESCALE(ps));
+ g_assert_cmphex(tim_read(td, TISR), ==, tim_timer_bit(td));
+}
+
+/*
+ * Constructs a name that includes the timer block, timer and testcase name,
+ * and adds the test to the test suite.
+ */
+static void tim_add_test(const char *name, const TestData *td, GTestDataFunc fn)
+{
+ g_autofree char *full_name;
+
+ full_name = g_strdup_printf("npcm7xx_timer/tim[%d]/timer[%d]/%s",
+ tim_index(td->tim), timer_index(td->timer),
+ name);
+ qtest_add_data_func(full_name, td, fn);
+}
+
+/* Convenience macro for adding a test with a predictable function name. */
+#define add_test(name, td) tim_add_test(#name, td, test_##name)
+
+int main(int argc, char **argv)
+{
+ TestData testdata[ARRAY_SIZE(timer_block) * ARRAY_SIZE(timer)];
+ int ret;
+ int i, j;
+
+ g_test_init(&argc, &argv, NULL);
+ g_test_set_nonfatal_assertions();
+
+ for (i = 0; i < ARRAY_SIZE(timer_block); i++) {
+ for (j = 0; j < ARRAY_SIZE(timer); j++) {
+ TestData *td = &testdata[i * ARRAY_SIZE(timer) + j];
+ td->tim = &timer_block[i];
+ td->timer = &timer[j];
+
+ add_test(reset, td);
+ add_test(reset_overrides_enable, td);
+ add_test(oneshot_enable_then_disable, td);
+ add_test(oneshot_ps5, td);
+ add_test(oneshot_ps0, td);
+ add_test(oneshot_ps255, td);
+ add_test(oneshot_interrupt, td);
+ add_test(pause_resume, td);
+ add_test(prescaler_change, td);
+ add_test(periodic_no_interrupt, td);
+ add_test(periodic_interrupt, td);
+ add_test(disable_on_expiration, td);
+ }
+ }
+
+ qtest_start("-machine npcm750-evb");
+ qtest_irq_intercept_in(global_qtest, "/machine/soc/a9mpcore/gic");
+ ret = g_test_run();
+ qtest_end();
+
+ return ret;
+}
diff --git a/tests/qtest/meson.build b/tests/qtest/meson.build
index 0f32ca0895..941d7cb8c5 100644
--- a/tests/qtest/meson.build
+++ b/tests/qtest/meson.build
@@ -137,6 +137,7 @@ qtests_arm = \
['arm-cpu-features',
'microbit-test',
'm25p80-test',
+ 'npcm7xx_timer-test',
'test-arm-mptimer',
'boot-serial-test',
'hexloader-test']
--
2.28.0.1011.ga647a8990f-goog
^ permalink raw reply related [flat|nested] 14+ messages in thread* [PATCH 2/6] Move npcm7xx_timer_reached_zero call out of npcm7xx_timer_pause
2020-10-08 23:21 [PATCH 0/6] Additional NPCM7xx features, devices and tests Havard Skinnemoen via
2020-10-08 23:21 ` [PATCH 1/6] tests/qtest: Add npcm7xx timer test Havard Skinnemoen via
@ 2020-10-08 23:21 ` Havard Skinnemoen via
2020-10-19 16:00 ` Philippe Mathieu-Daudé
2020-10-08 23:21 ` [PATCH 3/6] hw/timer: Adding watchdog for NPCM7XX Timer Havard Skinnemoen via
` (4 subsequent siblings)
6 siblings, 1 reply; 14+ messages in thread
From: Havard Skinnemoen via @ 2020-10-08 23:21 UTC (permalink / raw)
To: qemu-devel
Cc: qemu-arm, peter.maydell, Avi.Fishman, kfting, f4bug, clg,
Havard Skinnemoen
This allows us to reuse npcm7xx_timer_pause for the watchdog timer.
Signed-off-by: Havard Skinnemoen <hskinnemoen@google.com>
---
hw/timer/npcm7xx_timer.c | 6 +++---
1 file changed, 3 insertions(+), 3 deletions(-)
diff --git a/hw/timer/npcm7xx_timer.c b/hw/timer/npcm7xx_timer.c
index 5703e43d40..2df9e3e496 100644
--- a/hw/timer/npcm7xx_timer.c
+++ b/hw/timer/npcm7xx_timer.c
@@ -157,9 +157,6 @@ static void npcm7xx_timer_pause(NPCM7xxTimer *t)
timer_del(&t->qtimer);
now = qemu_clock_get_ns(QEMU_CLOCK_VIRTUAL);
t->remaining_ns = t->expires_ns - now;
- if (t->remaining_ns <= 0) {
- npcm7xx_timer_reached_zero(t);
- }
}
/*
@@ -239,6 +236,9 @@ static void npcm7xx_timer_write_tcsr(NPCM7xxTimer *t, uint32_t new_tcsr)
} else {
t->tcsr &= ~NPCM7XX_TCSR_CACT;
npcm7xx_timer_pause(t);
+ if (t->remaining_ns <= 0) {
+ npcm7xx_timer_reached_zero(t);
+ }
}
}
}
--
2.28.0.1011.ga647a8990f-goog
^ permalink raw reply related [flat|nested] 14+ messages in thread* [PATCH 3/6] hw/timer: Adding watchdog for NPCM7XX Timer.
2020-10-08 23:21 [PATCH 0/6] Additional NPCM7xx features, devices and tests Havard Skinnemoen via
2020-10-08 23:21 ` [PATCH 1/6] tests/qtest: Add npcm7xx timer test Havard Skinnemoen via
2020-10-08 23:21 ` [PATCH 2/6] Move npcm7xx_timer_reached_zero call out of npcm7xx_timer_pause Havard Skinnemoen via
@ 2020-10-08 23:21 ` Havard Skinnemoen via
2020-10-20 12:55 ` Peter Maydell
2020-10-08 23:21 ` [PATCH 4/6] hw/misc: Add npcm7xx random number generator Havard Skinnemoen via
` (3 subsequent siblings)
6 siblings, 1 reply; 14+ messages in thread
From: Havard Skinnemoen via @ 2020-10-08 23:21 UTC (permalink / raw)
To: qemu-devel
Cc: qemu-arm, peter.maydell, Avi.Fishman, kfting, f4bug, clg, Hao Wu,
Havard Skinnemoen
From: Hao Wu <wuhaotsh@google.com>
The watchdog is part of NPCM7XX's timer module. Its behavior is
controlled by the WTCR register in the timer.
When enabled, the watchdog issues an interrupt signal after a pre-set
amount of cycles, and issues a reset signal shortly after that.
Reviewed-by: Tyrone Ting <kfting@nuvoton.com>
Signed-off-by: Hao Wu <wuhaotsh@google.com>
Signed-off-by: Havard Skinnemoen <hskinnemoen@google.com>
---
include/hw/misc/npcm7xx_clk.h | 9 +
include/hw/timer/npcm7xx_timer.h | 43 ++-
hw/arm/npcm7xx.c | 11 +
hw/misc/npcm7xx_clk.c | 20 ++
hw/timer/npcm7xx_timer.c | 275 +++++++++++++++----
tests/qtest/npcm7xx_watchdog_timer-test.c | 313 ++++++++++++++++++++++
MAINTAINERS | 1 +
tests/qtest/meson.build | 1 +
8 files changed, 620 insertions(+), 53 deletions(-)
create mode 100644 tests/qtest/npcm7xx_watchdog_timer-test.c
diff --git a/include/hw/misc/npcm7xx_clk.h b/include/hw/misc/npcm7xx_clk.h
index cdcc9e8534..483028cf63 100644
--- a/include/hw/misc/npcm7xx_clk.h
+++ b/include/hw/misc/npcm7xx_clk.h
@@ -42,6 +42,15 @@ typedef struct NPCM7xxCLKState {
int64_t ref_ns;
} NPCM7xxCLKState;
+/**
+ * npcm7xx_clk_perform_watchdog_reset - Perform watchdog reset action generated
+ * by a watchdog event.
+ * @clk: The clock module that connects to the watchdog.
+ * @watchdog_index: The index of the watchdog that triggered the reset action.
+ */
+void npcm7xx_clk_perform_watchdog_reset(NPCM7xxCLKState *clk,
+ int watchdog_index);
+
#define TYPE_NPCM7XX_CLK "npcm7xx-clk"
#define NPCM7XX_CLK(obj) OBJECT_CHECK(NPCM7xxCLKState, (obj), TYPE_NPCM7XX_CLK)
diff --git a/include/hw/timer/npcm7xx_timer.h b/include/hw/timer/npcm7xx_timer.h
index 878a365a79..3adeb56f3b 100644
--- a/include/hw/timer/npcm7xx_timer.h
+++ b/include/hw/timer/npcm7xx_timer.h
@@ -29,14 +29,27 @@
*/
#define NPCM7XX_TIMER_NR_REGS (0x54 / sizeof(uint32_t))
+/* The basic watchdog timer period is 2^14 clock cycles. */
+#define NPCM7XX_WATCHDOG_BASETIME_SHIFT 14
+
typedef struct NPCM7xxTimerCtrlState NPCM7xxTimerCtrlState;
/**
- * struct NPCM7xxTimer - Individual timer state.
- * @irq: GIC interrupt line to fire on expiration (if enabled).
+ * struct NPCM7xxBaseTimer - Basic functionality that both regular timer and
+ * watchdog timer use.
* @qtimer: QEMU timer that notifies us on expiration.
* @expires_ns: Absolute virtual expiration time.
* @remaining_ns: Remaining time until expiration if timer is paused.
+ */
+typedef struct NPCM7xxBaseTimer {
+ QEMUTimer qtimer;
+ int64_t expires_ns;
+ int64_t remaining_ns;
+} NPCM7xxBaseTimer;
+
+/**
+ * struct NPCM7xxTimer - Individual timer state.
+ * @irq: GIC interrupt line to fire on expiration (if enabled).
* @tcsr: The Timer Control and Status Register.
* @ticr: The Timer Initial Count Register.
*/
@@ -44,20 +57,34 @@ typedef struct NPCM7xxTimer {
NPCM7xxTimerCtrlState *ctrl;
qemu_irq irq;
- QEMUTimer qtimer;
- int64_t expires_ns;
- int64_t remaining_ns;
+ NPCM7xxBaseTimer base_timer;
uint32_t tcsr;
uint32_t ticr;
} NPCM7xxTimer;
+/**
+ * struct NPCM7xxWatchdogTimer - The watchdog timer state.
+ * @irq: GIC interrupt line to fire on expiration (if enabled).
+ * @qtimer: QEMU timer that notifies us on expiration.
+ * @expires_ns: Absolute virtual expiration time.
+ * @remaining_ns: Remaining time until expiration if timer is paused.
+ * @wtcr: The Watchdog Timer Control Register.
+ */
+typedef struct NPCM7xxWatchdogTimer {
+ NPCM7xxTimerCtrlState *ctrl;
+
+ qemu_irq irq;
+ NPCM7xxBaseTimer base_timer;
+
+ uint32_t wtcr;
+} NPCM7xxWatchdogTimer;
+
/**
* struct NPCM7xxTimerCtrlState - Timer Module device state.
* @parent: System bus device.
* @iomem: Memory region through which registers are accessed.
* @tisr: The Timer Interrupt Status Register.
- * @wtcr: The Watchdog Timer Control Register.
* @timer: The five individual timers managed by this module.
*/
struct NPCM7xxTimerCtrlState {
@@ -65,10 +92,12 @@ struct NPCM7xxTimerCtrlState {
MemoryRegion iomem;
+ uint8_t index;
+ NPCM7xxCLKState *clk;
uint32_t tisr;
- uint32_t wtcr;
NPCM7xxTimer timer[NPCM7XX_TIMERS_PER_CTRL];
+ NPCM7xxWatchdogTimer watchdog_timer;
};
#define TYPE_NPCM7XX_TIMER "npcm7xx-timer"
diff --git a/hw/arm/npcm7xx.c b/hw/arm/npcm7xx.c
index 037f3a26f2..472efeaf3d 100644
--- a/hw/arm/npcm7xx.c
+++ b/hw/arm/npcm7xx.c
@@ -86,6 +86,9 @@ enum NPCM7xxInterrupt {
NPCM7XX_TIMER12_IRQ,
NPCM7XX_TIMER13_IRQ,
NPCM7XX_TIMER14_IRQ,
+ NPCM7XX_WDG0_IRQ = 47, /* Timer Module 0 Watchdog */
+ NPCM7XX_WDG1_IRQ, /* Timer Module 1 Watchdog */
+ NPCM7XX_WDG2_IRQ, /* Timer Module 2 Watchdog */
};
/* Total number of GIC interrupts, including internal Cortex-A9 interrupts. */
@@ -345,6 +348,10 @@ static void npcm7xx_realize(DeviceState *dev, Error **errp)
int first_irq;
int j;
+ object_property_set_uint(OBJECT(&s->tim[i]), "index", i, &error_abort);
+ object_property_set_link(OBJECT(&s->tim[i]), "clk", OBJECT(&s->clk),
+ &error_abort);
+
sysbus_realize(sbd, &error_abort);
sysbus_mmio_map(sbd, 0, npcm7xx_tim_addr[i]);
@@ -353,6 +360,10 @@ static void npcm7xx_realize(DeviceState *dev, Error **errp)
qemu_irq irq = npcm7xx_irq(s, first_irq + j);
sysbus_connect_irq(sbd, j, irq);
}
+
+ /* IRQ for watchdogs */
+ sysbus_connect_irq(sbd, NPCM7XX_TIMERS_PER_CTRL,
+ npcm7xx_irq(s, NPCM7XX_WDG0_IRQ + i));
}
/* UART0..3 (16550 compatible) */
diff --git a/hw/misc/npcm7xx_clk.c b/hw/misc/npcm7xx_clk.c
index 21ab4200d1..5c159dad1f 100644
--- a/hw/misc/npcm7xx_clk.c
+++ b/hw/misc/npcm7xx_clk.c
@@ -24,6 +24,7 @@
#include "qemu/timer.h"
#include "qemu/units.h"
#include "trace.h"
+#include "sysemu/watchdog.h"
#define PLLCON_LOKI BIT(31)
#define PLLCON_LOKS BIT(30)
@@ -87,6 +88,9 @@ static const uint32_t cold_reset_values[NPCM7XX_CLK_NR_REGS] = {
[NPCM7XX_CLK_AHBCKFI] = 0x000000c8,
};
+/* Register Field Definitions */
+#define NPCM7XX_CLK_WDRCR_CA9C BIT(0) /* Cortex A9 Cores */
+
static uint64_t npcm7xx_clk_read(void *opaque, hwaddr offset, unsigned size)
{
uint32_t reg = offset / sizeof(uint32_t);
@@ -187,6 +191,22 @@ static void npcm7xx_clk_write(void *opaque, hwaddr offset,
s->regs[reg] = value;
}
+void npcm7xx_clk_perform_watchdog_reset(NPCM7xxCLKState *clk,
+ int watchdog_index)
+{
+ uint32_t rcr;
+
+ g_assert(watchdog_index >= 0 && watchdog_index < 3);
+ rcr = clk->regs[NPCM7XX_CLK_WD0RCR + watchdog_index];
+ if (rcr & NPCM7XX_CLK_WDRCR_CA9C) {
+ watchdog_perform_action();
+ } else {
+ qemu_log_mask(LOG_UNIMP,
+ "%s: only CPU reset is implemented. (requested 0x%" PRIx32")\n",
+ __func__, rcr);
+ }
+}
+
static const struct MemoryRegionOps npcm7xx_clk_ops = {
.read = npcm7xx_clk_read,
.write = npcm7xx_clk_write,
diff --git a/hw/timer/npcm7xx_timer.c b/hw/timer/npcm7xx_timer.c
index 2df9e3e496..e89682f6f4 100644
--- a/hw/timer/npcm7xx_timer.c
+++ b/hw/timer/npcm7xx_timer.c
@@ -17,6 +17,7 @@
#include "qemu/osdep.h"
#include "hw/irq.h"
+#include "hw/qdev-properties.h"
#include "hw/misc/npcm7xx_clk.h"
#include "hw/timer/npcm7xx_timer.h"
#include "migration/vmstate.h"
@@ -26,6 +27,8 @@
#include "qemu/module.h"
#include "qemu/timer.h"
#include "qemu/units.h"
+#include "sysemu/reset.h"
+#include "sysemu/watchdog.h"
#include "trace.h"
/* 32-bit register indices. */
@@ -60,6 +63,50 @@ enum NPCM7xxTimerRegisters {
#define NPCM7XX_TCSR_PRESCALE_START 0
#define NPCM7XX_TCSR_PRESCALE_LEN 8
+#define NPCM7XX_WTCR_WTCLK(rv) extract32(rv, 10, 2)
+#define NPCM7XX_WTCR_FREEZE_EN BIT(9)
+#define NPCM7XX_WTCR_WTE BIT(7)
+#define NPCM7XX_WTCR_WTIE BIT(6)
+#define NPCM7XX_WTCR_WTIS(rv) extract32(rv, 4, 2)
+#define NPCM7XX_WTCR_WTIF BIT(3)
+#define NPCM7XX_WTCR_WTRF BIT(2)
+#define NPCM7XX_WTCR_WTRE BIT(1)
+#define NPCM7XX_WTCR_WTR BIT(0)
+
+/*
+ * The number of clock cycles between interrupt and reset in watchdog, used
+ * by the software to handle the interrupt before system is reset.
+ */
+#define NPCM7XX_WATCHDOG_INTERRUPT_TO_RESET_CYCLES 1024
+
+/* Start or resume the timer. */
+static void npcm7xx_timer_start(NPCM7xxBaseTimer *t)
+{
+ int64_t now;
+
+ now = qemu_clock_get_ns(QEMU_CLOCK_VIRTUAL);
+ t->expires_ns = now + t->remaining_ns;
+ timer_mod(&t->qtimer, t->expires_ns);
+}
+
+/* Stop counting. Record the time remaining so we can continue later. */
+static void npcm7xx_timer_pause(NPCM7xxBaseTimer *t)
+{
+ int64_t now;
+
+ timer_del(&t->qtimer);
+ now = qemu_clock_get_ns(QEMU_CLOCK_VIRTUAL);
+ t->remaining_ns = t->expires_ns - now;
+}
+
+/* Delete the timer and reset it to default state. */
+static void npcm7xx_timer_clear(NPCM7xxBaseTimer *t)
+{
+ timer_del(&t->qtimer);
+ t->expires_ns = 0;
+ t->remaining_ns = 0;
+}
+
/*
* Returns the index of timer in the tc->timer array. This can be used to
* locate the registers that belong to this timer.
@@ -102,6 +149,52 @@ static uint32_t npcm7xx_timer_ns_to_count(NPCM7xxTimer *t, int64_t ns)
return count;
}
+static uint32_t npcm7xx_watchdog_timer_prescaler(const NPCM7xxWatchdogTimer *t)
+{
+ switch (NPCM7XX_WTCR_WTCLK(t->wtcr)) {
+ case 0:
+ return 1;
+ case 1:
+ return 256;
+ case 2:
+ return 2048;
+ case 3:
+ return 65536;
+ default:
+ g_assert_not_reached();
+ }
+}
+
+static void npcm7xx_watchdog_timer_reset_cycles(NPCM7xxWatchdogTimer *t,
+ int64_t cycles)
+{
+ uint32_t prescaler = npcm7xx_watchdog_timer_prescaler(t);
+ int64_t ns = (NANOSECONDS_PER_SECOND / NPCM7XX_TIMER_REF_HZ) * cycles;
+
+ /*
+ * The reset function always clear the current timer. The caller to the
+ * this needs to decide whether to start the watchdog timer based on
+ * specific flag in WTCR.
+ */
+ npcm7xx_timer_clear(&t->base_timer);
+
+ ns *= prescaler;
+ t->base_timer.remaining_ns = ns;
+}
+
+static void npcm7xx_watchdog_timer_reset(NPCM7xxWatchdogTimer *t)
+{
+ int64_t cycles = 1;
+ uint32_t s = NPCM7XX_WTCR_WTIS(t->wtcr);
+
+ g_assert(s <= 3);
+
+ cycles <<= NPCM7XX_WATCHDOG_BASETIME_SHIFT;
+ cycles <<= 2 * s;
+
+ npcm7xx_watchdog_timer_reset_cycles(t, cycles);
+}
+
/*
* Raise the interrupt line if there's a pending interrupt and interrupts are
* enabled for this timer. If not, lower it.
@@ -116,16 +209,6 @@ static void npcm7xx_timer_check_interrupt(NPCM7xxTimer *t)
trace_npcm7xx_timer_irq(DEVICE(tc)->canonical_path, index, pending);
}
-/* Start or resume the timer. */
-static void npcm7xx_timer_start(NPCM7xxTimer *t)
-{
- int64_t now;
-
- now = qemu_clock_get_ns(QEMU_CLOCK_VIRTUAL);
- t->expires_ns = now + t->remaining_ns;
- timer_mod(&t->qtimer, t->expires_ns);
-}
-
/*
* Called when the counter reaches zero. Sets the interrupt flag, and either
* restarts or disables the timer.
@@ -138,9 +221,9 @@ static void npcm7xx_timer_reached_zero(NPCM7xxTimer *t)
tc->tisr |= BIT(index);
if (t->tcsr & NPCM7XX_TCSR_PERIODIC) {
- t->remaining_ns = npcm7xx_timer_count_to_ns(t, t->ticr);
+ t->base_timer.remaining_ns = npcm7xx_timer_count_to_ns(t, t->ticr);
if (t->tcsr & NPCM7XX_TCSR_CEN) {
- npcm7xx_timer_start(t);
+ npcm7xx_timer_start(&t->base_timer);
}
} else {
t->tcsr &= ~(NPCM7XX_TCSR_CEN | NPCM7XX_TCSR_CACT);
@@ -149,15 +232,6 @@ static void npcm7xx_timer_reached_zero(NPCM7xxTimer *t)
npcm7xx_timer_check_interrupt(t);
}
-/* Stop counting. Record the time remaining so we can continue later. */
-static void npcm7xx_timer_pause(NPCM7xxTimer *t)
-{
- int64_t now;
-
- timer_del(&t->qtimer);
- now = qemu_clock_get_ns(QEMU_CLOCK_VIRTUAL);
- t->remaining_ns = t->expires_ns - now;
-}
/*
* Restart the timer from its initial value. If the timer was enabled and stays
@@ -167,10 +241,10 @@ static void npcm7xx_timer_pause(NPCM7xxTimer *t)
*/
static void npcm7xx_timer_restart(NPCM7xxTimer *t, uint32_t old_tcsr)
{
- t->remaining_ns = npcm7xx_timer_count_to_ns(t, t->ticr);
+ t->base_timer.remaining_ns = npcm7xx_timer_count_to_ns(t, t->ticr);
if (old_tcsr & t->tcsr & NPCM7XX_TCSR_CEN) {
- npcm7xx_timer_start(t);
+ npcm7xx_timer_start(&t->base_timer);
}
}
@@ -181,10 +255,10 @@ static uint32_t npcm7xx_timer_read_tdr(NPCM7xxTimer *t)
if (t->tcsr & NPCM7XX_TCSR_CEN) {
int64_t now = qemu_clock_get_ns(QEMU_CLOCK_VIRTUAL);
- return npcm7xx_timer_ns_to_count(t, t->expires_ns - now);
+ return npcm7xx_timer_ns_to_count(t, t->base_timer.expires_ns - now);
}
- return npcm7xx_timer_ns_to_count(t, t->remaining_ns);
+ return npcm7xx_timer_ns_to_count(t, t->base_timer.remaining_ns);
}
static void npcm7xx_timer_write_tcsr(NPCM7xxTimer *t, uint32_t new_tcsr)
@@ -216,9 +290,9 @@ static void npcm7xx_timer_write_tcsr(NPCM7xxTimer *t, uint32_t new_tcsr)
if (npcm7xx_tcsr_prescaler(old_tcsr) != npcm7xx_tcsr_prescaler(new_tcsr)) {
/* Recalculate time remaining based on the current TDR value. */
- t->remaining_ns = npcm7xx_timer_count_to_ns(t, tdr);
+ t->base_timer.remaining_ns = npcm7xx_timer_count_to_ns(t, tdr);
if (old_tcsr & t->tcsr & NPCM7XX_TCSR_CEN) {
- npcm7xx_timer_start(t);
+ npcm7xx_timer_start(&t->base_timer);
}
}
@@ -232,11 +306,11 @@ static void npcm7xx_timer_write_tcsr(NPCM7xxTimer *t, uint32_t new_tcsr)
if ((old_tcsr ^ new_tcsr) & NPCM7XX_TCSR_CEN) {
if (new_tcsr & NPCM7XX_TCSR_CEN) {
t->tcsr |= NPCM7XX_TCSR_CACT;
- npcm7xx_timer_start(t);
+ npcm7xx_timer_start(&t->base_timer);
} else {
t->tcsr &= ~NPCM7XX_TCSR_CACT;
- npcm7xx_timer_pause(t);
- if (t->remaining_ns <= 0) {
+ npcm7xx_timer_pause(&t->base_timer);
+ if (t->base_timer.remaining_ns <= 0) {
npcm7xx_timer_reached_zero(t);
}
}
@@ -259,9 +333,47 @@ static void npcm7xx_timer_write_tisr(NPCM7xxTimerCtrlState *s, uint32_t value)
if (value & (1U << i)) {
npcm7xx_timer_check_interrupt(&s->timer[i]);
}
+
}
}
+static void npcm7xx_timer_write_wtcr(NPCM7xxWatchdogTimer *t, uint32_t new_wtcr)
+{
+ uint32_t old_wtcr = t->wtcr;
+
+ /*
+ * WTIF and WTRF are cleared by writing 1. Writing 0 makes these bits
+ * unchanged.
+ */
+ if (new_wtcr & NPCM7XX_WTCR_WTIF) {
+ new_wtcr &= ~NPCM7XX_WTCR_WTIF;
+ } else if (old_wtcr & NPCM7XX_WTCR_WTIF) {
+ new_wtcr |= NPCM7XX_WTCR_WTIF;
+ }
+ if (new_wtcr & NPCM7XX_WTCR_WTRF) {
+ new_wtcr &= ~NPCM7XX_WTCR_WTRF;
+ } else if (old_wtcr & NPCM7XX_WTCR_WTRF) {
+ new_wtcr |= NPCM7XX_WTCR_WTRF;
+ }
+
+ t->wtcr = new_wtcr;
+
+ if (new_wtcr & NPCM7XX_WTCR_WTR) {
+ t->wtcr &= ~NPCM7XX_WTCR_WTR;
+ npcm7xx_watchdog_timer_reset(t);
+ if (new_wtcr & NPCM7XX_WTCR_WTE) {
+ npcm7xx_timer_start(&t->base_timer);
+ }
+ } else if ((old_wtcr ^ new_wtcr) & NPCM7XX_WTCR_WTE) {
+ if (new_wtcr & NPCM7XX_WTCR_WTE) {
+ npcm7xx_timer_start(&t->base_timer);
+ } else {
+ npcm7xx_timer_pause(&t->base_timer);
+ }
+ }
+
+}
+
static hwaddr npcm7xx_tcsr_index(hwaddr reg)
{
switch (reg) {
@@ -353,7 +465,7 @@ static uint64_t npcm7xx_timer_read(void *opaque, hwaddr offset, unsigned size)
break;
case NPCM7XX_TIMER_WTCR:
- value = s->wtcr;
+ value = s->watchdog_timer.wtcr;
break;
default:
@@ -409,8 +521,7 @@ static void npcm7xx_timer_write(void *opaque, hwaddr offset,
return;
case NPCM7XX_TIMER_WTCR:
- qemu_log_mask(LOG_UNIMP, "%s: WTCR write not implemented: 0x%08x\n",
- __func__, value);
+ npcm7xx_timer_write_wtcr(&s->watchdog_timer, value);
return;
}
@@ -448,15 +559,42 @@ static void npcm7xx_timer_enter_reset(Object *obj, ResetType type)
for (i = 0; i < NPCM7XX_TIMERS_PER_CTRL; i++) {
NPCM7xxTimer *t = &s->timer[i];
- timer_del(&t->qtimer);
- t->expires_ns = 0;
- t->remaining_ns = 0;
+ npcm7xx_timer_clear(&t->base_timer);
t->tcsr = 0x00000005;
t->ticr = 0x00000000;
}
s->tisr = 0x00000000;
- s->wtcr = 0x00000400;
+ /*
+ * Set WTCLK to 1(default) and resets all flags except WTRF.
+ * WTRF is not reset during a core domain reset.
+ */
+ s->watchdog_timer.wtcr = 0x00000400 | (s->watchdog_timer.wtcr &
+ NPCM7XX_WTCR_WTRF);
+}
+
+static void npcm7xx_watchdog_timer_expired(void *opaque)
+{
+ NPCM7xxWatchdogTimer *t = opaque;
+
+ if (t->wtcr & NPCM7XX_WTCR_WTE) {
+ if (t->wtcr & NPCM7XX_WTCR_WTIF) {
+ if (t->wtcr & NPCM7XX_WTCR_WTRE) {
+ t->wtcr |= NPCM7XX_WTCR_WTRF;
+ /* send reset signal to CLK module*/
+ npcm7xx_clk_perform_watchdog_reset(t->ctrl->clk,
+ t->ctrl->index);
+ }
+ } else {
+ t->wtcr |= NPCM7XX_WTCR_WTIF;
+ if (t->wtcr & NPCM7XX_WTCR_WTIE)
+ /* send interrupt */
+ qemu_irq_raise(t->irq);
+ npcm7xx_watchdog_timer_reset_cycles(t,
+ NPCM7XX_WATCHDOG_INTERRUPT_TO_RESET_CYCLES);
+ npcm7xx_timer_start(&t->base_timer);
+ }
+ }
}
static void npcm7xx_timer_hold_reset(Object *obj)
@@ -467,6 +605,7 @@ static void npcm7xx_timer_hold_reset(Object *obj)
for (i = 0; i < NPCM7XX_TIMERS_PER_CTRL; i++) {
qemu_irq_lower(s->timer[i].irq);
}
+ qemu_irq_lower(s->watchdog_timer.irq);
}
static void npcm7xx_timer_realize(DeviceState *dev, Error **errp)
@@ -474,47 +613,89 @@ static void npcm7xx_timer_realize(DeviceState *dev, Error **errp)
NPCM7xxTimerCtrlState *s = NPCM7XX_TIMER(dev);
SysBusDevice *sbd = &s->parent;
int i;
+ NPCM7xxWatchdogTimer *w;
for (i = 0; i < NPCM7XX_TIMERS_PER_CTRL; i++) {
NPCM7xxTimer *t = &s->timer[i];
t->ctrl = s;
- timer_init_ns(&t->qtimer, QEMU_CLOCK_VIRTUAL, npcm7xx_timer_expired, t);
+ timer_init_ns(&t->base_timer.qtimer, QEMU_CLOCK_VIRTUAL,
+ npcm7xx_timer_expired, t);
sysbus_init_irq(sbd, &t->irq);
}
+ w = &s->watchdog_timer;
+ w->ctrl = s;
+ timer_init_ns(&w->base_timer.qtimer, QEMU_CLOCK_VIRTUAL,
+ npcm7xx_watchdog_timer_expired, w);
+ sysbus_init_irq(sbd, &w->irq);
+
memory_region_init_io(&s->iomem, OBJECT(s), &npcm7xx_timer_ops, s,
TYPE_NPCM7XX_TIMER, 4 * KiB);
sysbus_init_mmio(sbd, &s->iomem);
}
-static const VMStateDescription vmstate_npcm7xx_timer = {
- .name = "npcm7xx-timer",
+static const VMStateDescription vmstate_npcm7xx_base_timer = {
+ .name = "npcm7xx-base-timer",
.version_id = 0,
.minimum_version_id = 0,
.fields = (VMStateField[]) {
- VMSTATE_TIMER(qtimer, NPCM7xxTimer),
- VMSTATE_INT64(expires_ns, NPCM7xxTimer),
- VMSTATE_INT64(remaining_ns, NPCM7xxTimer),
+ VMSTATE_TIMER(qtimer, NPCM7xxBaseTimer),
+ VMSTATE_INT64(expires_ns, NPCM7xxBaseTimer),
+ VMSTATE_INT64(remaining_ns, NPCM7xxBaseTimer),
+ VMSTATE_END_OF_LIST(),
+ },
+};
+
+static const VMStateDescription vmstate_npcm7xx_timer = {
+ .name = "npcm7xx-timer",
+ .version_id = 1,
+ .minimum_version_id = 1,
+ .fields = (VMStateField[]) {
+ VMSTATE_STRUCT(base_timer, NPCM7xxTimer,
+ 0, vmstate_npcm7xx_base_timer,
+ NPCM7xxBaseTimer),
VMSTATE_UINT32(tcsr, NPCM7xxTimer),
VMSTATE_UINT32(ticr, NPCM7xxTimer),
VMSTATE_END_OF_LIST(),
},
};
-static const VMStateDescription vmstate_npcm7xx_timer_ctrl = {
- .name = "npcm7xx-timer-ctrl",
+static const VMStateDescription vmstate_npcm7xx_watchdog_timer = {
+ .name = "npcm7xx-watchdog-timer",
.version_id = 0,
.minimum_version_id = 0,
+ .fields = (VMStateField[]) {
+ VMSTATE_STRUCT(base_timer, NPCM7xxTimer,
+ 0, vmstate_npcm7xx_base_timer,
+ NPCM7xxBaseTimer),
+ VMSTATE_UINT32(wtcr, NPCM7xxWatchdogTimer),
+ VMSTATE_END_OF_LIST(),
+ },
+};
+
+static const VMStateDescription vmstate_npcm7xx_timer_ctrl = {
+ .name = "npcm7xx-timer-ctrl",
+ .version_id = 1,
+ .minimum_version_id = 1,
.fields = (VMStateField[]) {
VMSTATE_UINT32(tisr, NPCM7xxTimerCtrlState),
- VMSTATE_UINT32(wtcr, NPCM7xxTimerCtrlState),
VMSTATE_STRUCT_ARRAY(timer, NPCM7xxTimerCtrlState,
NPCM7XX_TIMERS_PER_CTRL, 0, vmstate_npcm7xx_timer,
NPCM7xxTimer),
+ VMSTATE_STRUCT(watchdog_timer, NPCM7xxTimerCtrlState,
+ 0, vmstate_npcm7xx_watchdog_timer,
+ NPCM7xxWatchdogTimer),
VMSTATE_END_OF_LIST(),
},
};
+static Property npcm7xx_timer_properties[] = {
+ DEFINE_PROP_UINT8("index", NPCM7xxTimerCtrlState, index, 0),
+ DEFINE_PROP_LINK("clk", NPCM7xxTimerCtrlState, clk, TYPE_NPCM7XX_CLK,
+ NPCM7xxCLKState *),
+ DEFINE_PROP_END_OF_LIST(),
+};
+
static void npcm7xx_timer_class_init(ObjectClass *klass, void *data)
{
ResettableClass *rc = RESETTABLE_CLASS(klass);
@@ -527,6 +708,8 @@ static void npcm7xx_timer_class_init(ObjectClass *klass, void *data)
dc->vmsd = &vmstate_npcm7xx_timer_ctrl;
rc->phases.enter = npcm7xx_timer_enter_reset;
rc->phases.hold = npcm7xx_timer_hold_reset;
+
+ device_class_set_props(dc, npcm7xx_timer_properties);
}
static const TypeInfo npcm7xx_timer_info = {
diff --git a/tests/qtest/npcm7xx_watchdog_timer-test.c b/tests/qtest/npcm7xx_watchdog_timer-test.c
new file mode 100644
index 0000000000..bfe0020ffc
--- /dev/null
+++ b/tests/qtest/npcm7xx_watchdog_timer-test.c
@@ -0,0 +1,313 @@
+/*
+ * QTests for Nuvoton NPCM7xx Timer Watchdog Modules.
+ *
+ * Copyright 2020 Google LLC
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License as published by the
+ * Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
+ * for more details.
+ */
+
+#include "qemu/osdep.h"
+#include "qemu/timer.h"
+
+#include "libqtest-single.h"
+#include "qapi/qmp/qdict.h"
+
+#define WTCR_OFFSET 0x1c
+#define REF_HZ (25000000)
+
+/* WTCR bit fields */
+#define WTCLK(rv) ((rv) << 10)
+#define WTE BIT(7)
+#define WTIE BIT(6)
+#define WTIS(rv) ((rv) << 4)
+#define WTIF BIT(3)
+#define WTRF BIT(2)
+#define WTRE BIT(1)
+#define WTR BIT(0)
+
+typedef struct Watchdog {
+ int irq;
+ uint64_t base_addr;
+} Watchdog;
+
+static const Watchdog watchdog_list[] = {
+ {
+ .irq = 47,
+ .base_addr = 0xf0008000
+ },
+ {
+ .irq = 48,
+ .base_addr = 0xf0009000
+ },
+ {
+ .irq = 49,
+ .base_addr = 0xf000a000
+ }
+};
+
+
+static int watchdog_index(const Watchdog *wd)
+{
+ ptrdiff_t diff = wd - watchdog_list;
+
+ g_assert(diff >= 0 && diff < ARRAY_SIZE(watchdog_list));
+
+ return diff;
+}
+
+static uint32_t watchdog_read_wtcr(const Watchdog *wd)
+{
+ return readl(wd->base_addr + WTCR_OFFSET);
+}
+
+static void watchdog_write_wtcr(const Watchdog *wd, uint32_t value)
+{
+ writel(wd->base_addr + WTCR_OFFSET, value);
+}
+
+static uint32_t watchdog_prescaler(const Watchdog *wd)
+{
+ switch (extract32(watchdog_read_wtcr(wd), 10, 2)) {
+ case 0:
+ return 1;
+ case 1:
+ return 256;
+ case 2:
+ return 2048;
+ case 3:
+ return 65536;
+ default:
+ g_assert_not_reached();
+ }
+}
+
+static QDict *get_watchdog_action(QTestState *qts)
+{
+ QDict *ev = qtest_qmp_eventwait_ref(qts, "WATCHDOG");
+ QDict *data;
+
+ data = qdict_get_qdict(ev, "data");
+ qobject_ref(data);
+ qobject_unref(ev);
+ return data;
+}
+
+#define RESET_CYCLES 1024
+static uint32_t watchdog_interrupt_cycles(const Watchdog *wd)
+{
+ uint32_t wtis = extract32(watchdog_read_wtcr(wd), 4, 2);
+ return 1 << (14 + 2 * wtis);
+}
+
+static int64_t watchdog_calculate_steps(uint32_t count, uint32_t prescale)
+{
+ return (NANOSECONDS_PER_SECOND / REF_HZ) * count * prescale;
+}
+
+static int64_t watchdog_interrupt_steps(const Watchdog *wd)
+{
+ return watchdog_calculate_steps(watchdog_interrupt_cycles(wd),
+ watchdog_prescaler(wd));
+}
+
+/* Check wtcr can be reset to default value */
+static void test_init(gconstpointer watchdog)
+{
+ const Watchdog *wd = watchdog;
+ QTestState *qts = qtest_start("-machine quanta-gsj");
+
+ qtest_irq_intercept_in(qts, "/machine/soc/a9mpcore/gic");
+
+ watchdog_write_wtcr(wd, WTCLK(1) | WTRF | WTIF | WTR);
+ g_assert_cmphex(watchdog_read_wtcr(wd), ==, WTCLK(1));
+
+ qtest_end();
+}
+
+/* Check a watchdog can generate interrupt and reset actions */
+static void test_reset_action(gconstpointer watchdog)
+{
+ const Watchdog *wd = watchdog;
+ QTestState *qts = qtest_start("-machine quanta-gsj");
+ QDict *ad;
+
+ qtest_irq_intercept_in(qts, "/machine/soc/a9mpcore/gic");
+
+ watchdog_write_wtcr(wd, WTCLK(0) | WTE | WTRF | WTRE | WTIF | WTIE | WTR);
+ g_assert_cmphex(watchdog_read_wtcr(wd), ==, WTCLK(0) | WTE | WTRE | WTIE);
+
+ /* Check a watchdog can generate an interrupt */
+ clock_step(watchdog_interrupt_steps(wd));
+ g_assert_cmphex(watchdog_read_wtcr(wd), ==,
+ WTCLK(0) | WTE | WTIF | WTIE | WTRE);
+ g_assert_true(qtest_get_irq(qts, wd->irq));
+
+ /* Check a watchdog can generate a reset signal */
+ clock_step(watchdog_calculate_steps(RESET_CYCLES, watchdog_prescaler(wd)));
+ ad = get_watchdog_action(qts);
+ /* The signal is a reset signal */
+ g_assert_false(strcmp(qdict_get_str(ad, "action"), "reset"));
+ qobject_unref(ad);
+ qtest_qmp_eventwait(qts, "RESET");
+ /*
+ * Make sure WTCR is reset to default except for WTRF bit which shouldn't
+ * be reset.
+ */
+ g_assert_cmphex(watchdog_read_wtcr(wd), ==, WTCLK(1) | WTRF);
+ qtest_end();
+}
+
+/* Check a watchdog works with all possible WTCLK prescalers and WTIS cycles */
+static void test_prescaler(gconstpointer watchdog)
+{
+ const Watchdog *wd = watchdog;
+
+ for (int wtclk = 0; wtclk < 4; ++wtclk) {
+ for (int wtis = 0; wtis < 4; ++wtis) {
+ QTestState *qts = qtest_start("-machine quanta-gsj");
+
+ qtest_irq_intercept_in(qts, "/machine/soc/a9mpcore/gic");
+ watchdog_write_wtcr(wd,
+ WTCLK(wtclk) | WTE | WTIF | WTIS(wtis) | WTIE | WTR);
+ /*
+ * The interrupt doesn't fire until watchdog_interrupt_steps()
+ * cycles passed
+ */
+ clock_step(watchdog_interrupt_steps(wd) - 1);
+ g_assert_false(watchdog_read_wtcr(wd) & WTIF);
+ g_assert_false(qtest_get_irq(qts, wd->irq));
+ clock_step(1);
+ g_assert_true(watchdog_read_wtcr(wd) & WTIF);
+ g_assert_true(qtest_get_irq(qts, wd->irq));
+
+ qtest_end();
+ }
+ }
+}
+
+/*
+ * Check a watchdog doesn't fire if corresponding flags (WTIE and WTRE) are not
+ * set.
+ */
+static void test_enabling_flags(gconstpointer watchdog)
+{
+ const Watchdog *wd = watchdog;
+ QTestState *qts;
+
+ /* Neither WTIE or WTRE is set, no interrupt or reset should happen */
+ qts = qtest_start("-machine quanta-gsj");
+ qtest_irq_intercept_in(qts, "/machine/soc/a9mpcore/gic");
+ watchdog_write_wtcr(wd, WTCLK(0) | WTE | WTIF | WTRF | WTR);
+ clock_step(watchdog_interrupt_steps(wd));
+ g_assert_true(watchdog_read_wtcr(wd) & WTIF);
+ g_assert_false(qtest_get_irq(qts, wd->irq));
+ clock_step(watchdog_calculate_steps(RESET_CYCLES, watchdog_prescaler(wd)));
+ g_assert_true(watchdog_read_wtcr(wd) & WTIF);
+ g_assert_false(watchdog_read_wtcr(wd) & WTRF);
+ qtest_end();
+
+ /* Only WTIE is set, interrupt is triggered but reset should not happen */
+ qts = qtest_start("-machine quanta-gsj");
+ qtest_irq_intercept_in(qts, "/machine/soc/a9mpcore/gic");
+ watchdog_write_wtcr(wd, WTCLK(0) | WTE | WTIF | WTIE | WTRF | WTR);
+ clock_step(watchdog_interrupt_steps(wd));
+ g_assert_true(watchdog_read_wtcr(wd) & WTIF);
+ g_assert_true(qtest_get_irq(qts, wd->irq));
+ clock_step(watchdog_calculate_steps(RESET_CYCLES, watchdog_prescaler(wd)));
+ g_assert_true(watchdog_read_wtcr(wd) & WTIF);
+ g_assert_false(watchdog_read_wtcr(wd) & WTRF);
+ qtest_end();
+
+ /* Only WTRE is set, interrupt is triggered but reset should not happen */
+ qts = qtest_start("-machine quanta-gsj");
+ qtest_irq_intercept_in(qts, "/machine/soc/a9mpcore/gic");
+ watchdog_write_wtcr(wd, WTCLK(0) | WTE | WTIF | WTRE | WTRF | WTR);
+ clock_step(watchdog_interrupt_steps(wd));
+ g_assert_true(watchdog_read_wtcr(wd) & WTIF);
+ g_assert_false(qtest_get_irq(qts, wd->irq));
+ clock_step(watchdog_calculate_steps(RESET_CYCLES, watchdog_prescaler(wd)));
+ g_assert_false(strcmp(qdict_get_str(get_watchdog_action(qts), "action"),
+ "reset"));
+ qtest_qmp_eventwait(qts, "RESET");
+ qtest_end();
+
+ /*
+ * The case when both flags are set is already tested in
+ * test_reset_action().
+ */
+}
+
+/* Check a watchdog can pause and resume by setting WTE bits */
+static void test_pause(gconstpointer watchdog)
+{
+ const Watchdog *wd = watchdog;
+ QTestState *qts;
+ int64_t remaining_steps, steps;
+
+ qts = qtest_start("-machine quanta-gsj");
+ qtest_irq_intercept_in(qts, "/machine/soc/a9mpcore/gic");
+ watchdog_write_wtcr(wd, WTCLK(0) | WTE | WTIF | WTIE | WTRF | WTR);
+ remaining_steps = watchdog_interrupt_steps(wd);
+ g_assert_cmphex(watchdog_read_wtcr(wd), ==, WTCLK(0) | WTE | WTIE);
+
+ /* Run for half of the execution period. */
+ steps = remaining_steps / 2;
+ remaining_steps -= steps;
+ clock_step(steps);
+
+ /* Pause the watchdog */
+ watchdog_write_wtcr(wd, WTCLK(0) | WTIE);
+ g_assert_cmphex(watchdog_read_wtcr(wd), ==, WTCLK(0) | WTIE);
+
+ /* Run for a long period of time, the watchdog shouldn't fire */
+ clock_step(steps << 4);
+ g_assert_cmphex(watchdog_read_wtcr(wd), ==, WTCLK(0) | WTIE);
+ g_assert_false(qtest_get_irq(qts, wd->irq));
+
+ /* Resume the watchdog */
+ watchdog_write_wtcr(wd, WTCLK(0) | WTE | WTIE);
+ g_assert_cmphex(watchdog_read_wtcr(wd), ==, WTCLK(0) | WTE | WTIE);
+
+ /* Run for the reset of the execution period, the watchdog should fire */
+ clock_step(remaining_steps);
+ g_assert_cmphex(watchdog_read_wtcr(wd), ==, WTCLK(0) | WTE | WTIF | WTIE);
+ g_assert_true(qtest_get_irq(qts, wd->irq));
+
+ qtest_end();
+}
+
+static void watchdog_add_test(const char *name, const Watchdog* wd,
+ GTestDataFunc fn)
+{
+ g_autofree char *full_name = g_strdup_printf(
+ "npcm7xx_watchdog_timer[%d]/%s", watchdog_index(wd), name);
+ qtest_add_data_func(full_name, wd, fn);
+}
+#define add_test(name, td) watchdog_add_test(#name, td, test_##name)
+
+int main(int argc, char **argv)
+{
+ g_test_init(&argc, &argv, NULL);
+ g_test_set_nonfatal_assertions();
+
+ for (int i = 0; i < ARRAY_SIZE(watchdog_list); ++i) {
+ const Watchdog *wd = &watchdog_list[i];
+
+ add_test(init, wd);
+ add_test(reset_action, wd);
+ add_test(prescaler, wd);
+ add_test(enabling_flags, wd);
+ add_test(pause, wd);
+ }
+
+ return g_test_run();
+}
+
diff --git a/MAINTAINERS b/MAINTAINERS
index e9d85cc873..b73f70f4ac 100644
--- a/MAINTAINERS
+++ b/MAINTAINERS
@@ -759,6 +759,7 @@ L: qemu-arm@nongnu.org
S: Supported
F: hw/*/npcm7xx*
F: include/hw/*/npcm7xx*
+F: tests/qtest/npcm7xx*
F: pc-bios/npcm7xx_bootrom.bin
F: roms/vbootrom
diff --git a/tests/qtest/meson.build b/tests/qtest/meson.build
index 941d7cb8c5..03e4f116b6 100644
--- a/tests/qtest/meson.build
+++ b/tests/qtest/meson.build
@@ -138,6 +138,7 @@ qtests_arm = \
'microbit-test',
'm25p80-test',
'npcm7xx_timer-test',
+ 'npcm7xx_watchdog_timer-test',
'test-arm-mptimer',
'boot-serial-test',
'hexloader-test']
--
2.28.0.1011.ga647a8990f-goog
^ permalink raw reply related [flat|nested] 14+ messages in thread* Re: [PATCH 3/6] hw/timer: Adding watchdog for NPCM7XX Timer.
2020-10-08 23:21 ` [PATCH 3/6] hw/timer: Adding watchdog for NPCM7XX Timer Havard Skinnemoen via
@ 2020-10-20 12:55 ` Peter Maydell
0 siblings, 0 replies; 14+ messages in thread
From: Peter Maydell @ 2020-10-20 12:55 UTC (permalink / raw)
To: Havard Skinnemoen
Cc: Philippe Mathieu-Daudé,
QEMU Developers, Hao Wu, CS20 KFTing, qemu-arm,
Cédric Le Goater, IS20 Avi Fishman
On Fri, 9 Oct 2020 at 00:22, Havard Skinnemoen <hskinnemoen@google.com> wrote:
>
> From: Hao Wu <wuhaotsh@google.com>
>
> The watchdog is part of NPCM7XX's timer module. Its behavior is
> controlled by the WTCR register in the timer.
>
> When enabled, the watchdog issues an interrupt signal after a pre-set
> amount of cycles, and issues a reset signal shortly after that.
>
> Reviewed-by: Tyrone Ting <kfting@nuvoton.com>
> Signed-off-by: Hao Wu <wuhaotsh@google.com>
> Signed-off-by: Havard Skinnemoen <hskinnemoen@google.com>
> ---
> include/hw/misc/npcm7xx_clk.h | 9 +
> include/hw/timer/npcm7xx_timer.h | 43 ++-
> hw/arm/npcm7xx.c | 11 +
> hw/misc/npcm7xx_clk.c | 20 ++
> hw/timer/npcm7xx_timer.c | 275 +++++++++++++++----
> tests/qtest/npcm7xx_watchdog_timer-test.c | 313 ++++++++++++++++++++++
> MAINTAINERS | 1 +
> tests/qtest/meson.build | 1 +
> 8 files changed, 620 insertions(+), 53 deletions(-)
> create mode 100644 tests/qtest/npcm7xx_watchdog_timer-test.c
>
> diff --git a/include/hw/misc/npcm7xx_clk.h b/include/hw/misc/npcm7xx_clk.h
> index cdcc9e8534..483028cf63 100644
> --- a/include/hw/misc/npcm7xx_clk.h
> +++ b/include/hw/misc/npcm7xx_clk.h
> @@ -42,6 +42,15 @@ typedef struct NPCM7xxCLKState {
> int64_t ref_ns;
> } NPCM7xxCLKState;
>
> +/**
> + * npcm7xx_clk_perform_watchdog_reset - Perform watchdog reset action generated
> + * by a watchdog event.
> + * @clk: The clock module that connects to the watchdog.
> + * @watchdog_index: The index of the watchdog that triggered the reset action.
> + */
> +void npcm7xx_clk_perform_watchdog_reset(NPCM7xxCLKState *clk,
> + int watchdog_index);
It looks like you're using this as a mechanism for having the
watchdog module signal to the clock module that it needs to
do a reset. The usual way I'd implement a cross-device
link like that would be to use a qemu_irq for it -- the
receiving end creates a named GPIO input, the sending end
has a named GPIO output, and the SoC that creates both devices
also wires the GPIO link from one to the other. (You can
send an arbitrary integer down a qemu_irq, not just an
on/off, so you could do this either with an array of N
GPIOs, one per watchdog, or with just one that you send
an index value down.)
I have a handful of nits below but other than the above issue
this patch looks good.
> +static void npcm7xx_watchdog_timer_reset_cycles(NPCM7xxWatchdogTimer *t,
> + int64_t cycles)
> +{
> + uint32_t prescaler = npcm7xx_watchdog_timer_prescaler(t);
> + int64_t ns = (NANOSECONDS_PER_SECOND / NPCM7XX_TIMER_REF_HZ) * cycles;
> +
> + /*
> + * The reset function always clear the current timer. The caller to the
> + * this needs to decide whether to start the watchdog timer based on
"always clears". "The caller of this".
> + * specific flag in WTCR.
> + */
> + npcm7xx_timer_clear(&t->base_timer);
> +
> + ns *= prescaler;
> + t->base_timer.remaining_ns = ns;
> +}
> @@ -259,9 +333,47 @@ static void npcm7xx_timer_write_tisr(NPCM7xxTimerCtrlState *s, uint32_t value)
> if (value & (1U << i)) {
> npcm7xx_timer_check_interrupt(&s->timer[i]);
> }
> +
Stray extra blank line?
> }
> }
>
> + /*
> + * Set WTCLK to 1(default) and resets all flags except WTRF.
> + * WTRF is not reset during a core domain reset.
> + */
"and reset all flags" (or "Sets", if you prefer)
+ s->watchdog_timer.wtcr = 0x00000400 | (s->watchdog_timer.wtcr &
> + NPCM7XX_WTCR_WTRF);
> +}
> +
> +static void npcm7xx_watchdog_timer_expired(void *opaque)
> +{
> + NPCM7xxWatchdogTimer *t = opaque;
> +
> + if (t->wtcr & NPCM7XX_WTCR_WTE) {
> + if (t->wtcr & NPCM7XX_WTCR_WTIF) {
> + if (t->wtcr & NPCM7XX_WTCR_WTRE) {
> + t->wtcr |= NPCM7XX_WTCR_WTRF;
> + /* send reset signal to CLK module*/
> + npcm7xx_clk_perform_watchdog_reset(t->ctrl->clk,
> + t->ctrl->index);
> + }
> + } else {
> + t->wtcr |= NPCM7XX_WTCR_WTIF;
> + if (t->wtcr & NPCM7XX_WTCR_WTIE)
> + /* send interrupt */
> + qemu_irq_raise(t->irq);
This if() is missing its mandatory braces. (Not sure why
checkpatch doesn't catch this.)
> + npcm7xx_watchdog_timer_reset_cycles(t,
> + NPCM7XX_WATCHDOG_INTERRUPT_TO_RESET_CYCLES);
> + npcm7xx_timer_start(&t->base_timer);
> + }
> + }
> }
thanks
-- PMM
^ permalink raw reply [flat|nested] 14+ messages in thread
* [PATCH 4/6] hw/misc: Add npcm7xx random number generator
2020-10-08 23:21 [PATCH 0/6] Additional NPCM7xx features, devices and tests Havard Skinnemoen via
` (2 preceding siblings ...)
2020-10-08 23:21 ` [PATCH 3/6] hw/timer: Adding watchdog for NPCM7XX Timer Havard Skinnemoen via
@ 2020-10-08 23:21 ` Havard Skinnemoen via
2020-10-20 13:02 ` Peter Maydell
2020-10-08 23:21 ` [PATCH 5/6] hw/arm/npcm7xx: Add EHCI and OHCI controllers Havard Skinnemoen via
` (2 subsequent siblings)
6 siblings, 1 reply; 14+ messages in thread
From: Havard Skinnemoen via @ 2020-10-08 23:21 UTC (permalink / raw)
To: qemu-devel
Cc: qemu-arm, peter.maydell, Avi.Fishman, kfting, f4bug, clg,
Havard Skinnemoen
The RNG module returns a byte of randomness when the Data Valid bit is
set.
This implementation ignores the prescaler setting, and loads a new value
into RNGD every time RNGCS is read while the RNG is enabled and random
data is available.
A qtest featuring some simple randomness tests is included.
Reviewed-by: Tyrone Ting <kfting@nuvoton.com>
Signed-off-by: Havard Skinnemoen <hskinnemoen@google.com>
---
docs/system/arm/nuvoton.rst | 2 +-
include/hw/arm/npcm7xx.h | 2 +
include/hw/misc/npcm7xx_rng.h | 34 ++++
hw/arm/npcm7xx.c | 7 +-
hw/misc/npcm7xx_rng.c | 179 +++++++++++++++++++++
tests/qtest/npcm7xx_rng-test.c | 278 +++++++++++++++++++++++++++++++++
hw/misc/meson.build | 1 +
hw/misc/trace-events | 4 +
tests/qtest/meson.build | 1 +
9 files changed, 506 insertions(+), 2 deletions(-)
create mode 100644 include/hw/misc/npcm7xx_rng.h
create mode 100644 hw/misc/npcm7xx_rng.c
create mode 100644 tests/qtest/npcm7xx_rng-test.c
diff --git a/docs/system/arm/nuvoton.rst b/docs/system/arm/nuvoton.rst
index e3e1a3a3a7..4342434df4 100644
--- a/docs/system/arm/nuvoton.rst
+++ b/docs/system/arm/nuvoton.rst
@@ -38,6 +38,7 @@ Supported devices
* DDR4 memory controller (dummy interface indicating memory training is done)
* OTP controllers (no protection features)
* Flash Interface Unit (FIU; no protection features)
+ * Random Number Generator (RNG)
Missing devices
---------------
@@ -59,7 +60,6 @@ Missing devices
* Peripheral SPI controller (PSPI)
* Analog to Digital Converter (ADC)
* SD/MMC host
- * Random Number Generator (RNG)
* PECI interface
* Pulse Width Modulation (PWM)
* Tachometer
diff --git a/include/hw/arm/npcm7xx.h b/include/hw/arm/npcm7xx.h
index 13106af215..761f9b987e 100644
--- a/include/hw/arm/npcm7xx.h
+++ b/include/hw/arm/npcm7xx.h
@@ -21,6 +21,7 @@
#include "hw/mem/npcm7xx_mc.h"
#include "hw/misc/npcm7xx_clk.h"
#include "hw/misc/npcm7xx_gcr.h"
+#include "hw/misc/npcm7xx_rng.h"
#include "hw/nvram/npcm7xx_otp.h"
#include "hw/timer/npcm7xx_timer.h"
#include "hw/ssi/npcm7xx_fiu.h"
@@ -75,6 +76,7 @@ typedef struct NPCM7xxState {
NPCM7xxOTPState key_storage;
NPCM7xxOTPState fuse_array;
NPCM7xxMCState mc;
+ NPCM7xxRNGState rng;
NPCM7xxFIUState fiu[2];
} NPCM7xxState;
diff --git a/include/hw/misc/npcm7xx_rng.h b/include/hw/misc/npcm7xx_rng.h
new file mode 100644
index 0000000000..5e85fd439d
--- /dev/null
+++ b/include/hw/misc/npcm7xx_rng.h
@@ -0,0 +1,34 @@
+/*
+ * Nuvoton NPCM7xx Random Number Generator.
+ *
+ * Copyright 2020 Google LLC
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License as published by the
+ * Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
+ * for more details.
+ */
+#ifndef NPCM7XX_RNG_H
+#define NPCM7XX_RNG_H
+
+#include "hw/sysbus.h"
+
+typedef struct NPCM7xxRNGState {
+ SysBusDevice parent;
+
+ MemoryRegion iomem;
+
+ uint8_t rngcs;
+ uint8_t rngd;
+ uint8_t rngmode;
+} NPCM7xxRNGState;
+
+#define TYPE_NPCM7XX_RNG "npcm7xx-rng"
+#define NPCM7XX_RNG(obj) OBJECT_CHECK(NPCM7xxRNGState, (obj), TYPE_NPCM7XX_RNG)
+
+#endif /* NPCM7XX_RNG_H */
diff --git a/hw/arm/npcm7xx.c b/hw/arm/npcm7xx.c
index 472efeaf3d..c4bbf3c7d5 100644
--- a/hw/arm/npcm7xx.c
+++ b/hw/arm/npcm7xx.c
@@ -44,6 +44,7 @@
#define NPCM7XX_GCR_BA (0xf0800000)
#define NPCM7XX_CLK_BA (0xf0801000)
#define NPCM7XX_MC_BA (0xf0824000)
+#define NPCM7XX_RNG_BA (0xf000b000)
/* Internal AHB SRAM */
#define NPCM7XX_RAM3_BA (0xc0008000)
@@ -256,6 +257,7 @@ static void npcm7xx_init(Object *obj)
object_initialize_child(obj, "otp2", &s->fuse_array,
TYPE_NPCM7XX_FUSE_ARRAY);
object_initialize_child(obj, "mc", &s->mc, TYPE_NPCM7XX_MC);
+ object_initialize_child(obj, "rng", &s->rng, TYPE_NPCM7XX_RNG);
for (i = 0; i < ARRAY_SIZE(s->tim); i++) {
object_initialize_child(obj, "tim[*]", &s->tim[i], TYPE_NPCM7XX_TIMER);
@@ -373,6 +375,10 @@ static void npcm7xx_realize(DeviceState *dev, Error **errp)
serial_hd(i), DEVICE_LITTLE_ENDIAN);
}
+ /* Random Number Generator. Cannot fail. */
+ sysbus_realize(SYS_BUS_DEVICE(&s->rng), &error_abort);
+ sysbus_mmio_map(SYS_BUS_DEVICE(&s->rng), 0, NPCM7XX_RNG_BA);
+
/*
* Flash Interface Unit (FIU). Can fail if incorrect number of chip selects
* specified, but this is a programming error.
@@ -411,7 +417,6 @@ static void npcm7xx_realize(DeviceState *dev, Error **errp)
create_unimplemented_device("npcm7xx.vdmx", 0xe0800000, 4 * KiB);
create_unimplemented_device("npcm7xx.pcierc", 0xe1000000, 64 * KiB);
create_unimplemented_device("npcm7xx.kcs", 0xf0007000, 4 * KiB);
- create_unimplemented_device("npcm7xx.rng", 0xf000b000, 4 * KiB);
create_unimplemented_device("npcm7xx.adc", 0xf000c000, 4 * KiB);
create_unimplemented_device("npcm7xx.gfxi", 0xf000e000, 4 * KiB);
create_unimplemented_device("npcm7xx.gpio[0]", 0xf0010000, 4 * KiB);
diff --git a/hw/misc/npcm7xx_rng.c b/hw/misc/npcm7xx_rng.c
new file mode 100644
index 0000000000..a4453382fb
--- /dev/null
+++ b/hw/misc/npcm7xx_rng.c
@@ -0,0 +1,179 @@
+/*
+ * Nuvoton NPCM7xx Flash Interface Unit (FIU)
+ *
+ * Copyright 2020 Google LLC
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License as published by the
+ * Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
+ * for more details.
+ */
+
+#include "qemu/osdep.h"
+
+#include "hw/misc/npcm7xx_rng.h"
+#include "migration/vmstate.h"
+#include "qemu/bitops.h"
+#include "qemu/guest-random.h"
+#include "qemu/log.h"
+#include "qemu/module.h"
+#include "qemu/units.h"
+
+#include "trace.h"
+
+#define NPCM7XX_RNG_REGS_SIZE (4 * KiB)
+
+#define NPCM7XX_RNGCS (0x00)
+#define NPCM7XX_RNGCS_CLKP(rv) extract32(rv, 2, 4)
+#define NPCM7XX_RNGCS_DVALID BIT(1)
+#define NPCM7XX_RNGCS_RNGE BIT(0)
+
+#define NPCM7XX_RNGD (0x04)
+#define NPCM7XX_RNGMODE (0x08)
+#define NPCM7XX_RNGMODE_NORMAL (0x02)
+
+static bool npcm7xx_rng_is_enabled(NPCM7xxRNGState *s)
+{
+ return (s->rngcs & NPCM7XX_RNGCS_RNGE) &&
+ (s->rngmode == NPCM7XX_RNGMODE_NORMAL);
+}
+
+static uint64_t npcm7xx_rng_read(void *opaque, hwaddr offset, unsigned size)
+{
+ NPCM7xxRNGState *s = opaque;
+ uint64_t value = 0;
+
+ switch (offset) {
+ case NPCM7XX_RNGCS:
+ /*
+ * If the RNG is enabled, but we don't have any valid random data, try
+ * obtaining some and update the DVALID bit accordingly.
+ */
+ if (!npcm7xx_rng_is_enabled(s)) {
+ s->rngcs &= ~NPCM7XX_RNGCS_DVALID;
+ } else if (!(s->rngcs & NPCM7XX_RNGCS_DVALID)) {
+ uint8_t byte = 0;
+
+ if (qemu_guest_getrandom(&byte, sizeof(byte), NULL) == 0) {
+ s->rngd = byte;
+ s->rngcs |= NPCM7XX_RNGCS_DVALID;
+ }
+ }
+ value = s->rngcs;
+ break;
+ case NPCM7XX_RNGD:
+ if (npcm7xx_rng_is_enabled(s) && s->rngcs & NPCM7XX_RNGCS_DVALID) {
+ s->rngcs &= ~NPCM7XX_RNGCS_DVALID;
+ value = s->rngd;
+ s->rngd = 0;
+ }
+ break;
+ case NPCM7XX_RNGMODE:
+ value = s->rngmode;
+ break;
+
+ default:
+ qemu_log_mask(LOG_GUEST_ERROR,
+ "%s: read from invalid offset 0x%" HWADDR_PRIx "\n",
+ DEVICE(s)->canonical_path, offset);
+ break;
+ }
+
+ trace_npcm7xx_rng_read(offset, value, size);
+
+ return value;
+}
+
+static void npcm7xx_rng_write(void *opaque, hwaddr offset, uint64_t value,
+ unsigned size)
+{
+ NPCM7xxRNGState *s = opaque;
+
+ trace_npcm7xx_rng_write(offset, value, size);
+
+ switch (offset) {
+ case NPCM7XX_RNGCS:
+ s->rngcs &= NPCM7XX_RNGCS_DVALID;
+ s->rngcs |= value & ~NPCM7XX_RNGCS_DVALID;
+ break;
+ case NPCM7XX_RNGD:
+ qemu_log_mask(LOG_GUEST_ERROR,
+ "%s: write to read-only register @ 0x%" HWADDR_PRIx "\n",
+ DEVICE(s)->canonical_path, offset);
+ break;
+ case NPCM7XX_RNGMODE:
+ s->rngmode = value;
+ break;
+ default:
+ qemu_log_mask(LOG_GUEST_ERROR,
+ "%s: write to invalid offset 0x%" HWADDR_PRIx "\n",
+ DEVICE(s)->canonical_path, offset);
+ break;
+ }
+}
+
+static const MemoryRegionOps npcm7xx_rng_ops = {
+ .read = npcm7xx_rng_read,
+ .write = npcm7xx_rng_write,
+ .endianness = DEVICE_LITTLE_ENDIAN,
+ .valid = {
+ .min_access_size = 1,
+ .max_access_size = 4,
+ .unaligned = false,
+ },
+};
+
+static void npcm7xx_rng_enter_reset(Object *obj, ResetType type)
+{
+ NPCM7xxRNGState *s = NPCM7XX_RNG(obj);
+
+ s->rngcs = 0;
+ s->rngd = 0;
+ s->rngmode = 0;
+}
+
+static void npcm7xx_rng_init(Object *obj)
+{
+ NPCM7xxRNGState *s = NPCM7XX_RNG(obj);
+
+ memory_region_init_io(&s->iomem, obj, &npcm7xx_rng_ops, s, "regs",
+ NPCM7XX_RNG_REGS_SIZE);
+ sysbus_init_mmio(&s->parent, &s->iomem);
+}
+
+static const VMStateDescription vmstate_npcm7xx_rng = {
+ .name = "npcm7xx-rng",
+ .version_id = 0,
+ .minimum_version_id = 0,
+ .fields = (VMStateField[]) {
+ VMSTATE_UINT8(rngcs, NPCM7xxRNGState),
+ VMSTATE_UINT8(rngd, NPCM7xxRNGState),
+ VMSTATE_UINT8(rngmode, NPCM7xxRNGState),
+ },
+};
+
+static void npcm7xx_rng_class_init(ObjectClass *klass, void *data)
+{
+ ResettableClass *rc = RESETTABLE_CLASS(klass);
+ DeviceClass *dc = DEVICE_CLASS(klass);
+
+ dc->desc = "NPCM7xx Random Number Generator";
+ dc->vmsd = &vmstate_npcm7xx_rng;
+ rc->phases.enter = npcm7xx_rng_enter_reset;
+}
+
+static const TypeInfo npcm7xx_rng_types[] = {
+ {
+ .name = TYPE_NPCM7XX_RNG,
+ .parent = TYPE_SYS_BUS_DEVICE,
+ .instance_size = sizeof(NPCM7xxRNGState),
+ .class_init = npcm7xx_rng_class_init,
+ .instance_init = npcm7xx_rng_init,
+ },
+};
+DEFINE_TYPES(npcm7xx_rng_types);
diff --git a/tests/qtest/npcm7xx_rng-test.c b/tests/qtest/npcm7xx_rng-test.c
new file mode 100644
index 0000000000..43f6dd1088
--- /dev/null
+++ b/tests/qtest/npcm7xx_rng-test.c
@@ -0,0 +1,278 @@
+/*
+ * QTest testcase for the Nuvoton NPCM7xx Random Number Generator
+ *
+ * Copyright 2020 Google LLC
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License as published by the
+ * Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
+ * for more details.
+ */
+
+#include <math.h>
+
+#include "qemu/osdep.h"
+
+#include "libqtest-single.h"
+#include "qemu/bitops.h"
+
+#define RNG_BASE_ADDR 0xf000b000
+
+/* Control and Status Register */
+#define RNGCS 0x00
+# define DVALID BIT(1) /* Data Valid */
+# define RNGE BIT(0) /* RNG Enable */
+/* Data Register */
+#define RNGD 0x04
+/* Mode Register */
+#define RNGMODE 0x08
+# define ROSEL_NORMAL (2) /* RNG only works in this mode */
+
+/* Number of bits to collect for randomness tests. */
+#define TEST_INPUT_BITS (128)
+
+static void rng_writeb(unsigned int offset, uint8_t value)
+{
+ writeb(RNG_BASE_ADDR + offset, value);
+}
+
+static uint8_t rng_readb(unsigned int offset)
+{
+ return readb(RNG_BASE_ADDR + offset);
+}
+
+/* Disable RNG and set normal ring oscillator mode. */
+static void rng_reset(void)
+{
+ rng_writeb(RNGCS, 0);
+ rng_writeb(RNGMODE, ROSEL_NORMAL);
+}
+
+/* Reset RNG and then enable it. */
+static void rng_reset_enable(void)
+{
+ rng_reset();
+ rng_writeb(RNGCS, RNGE);
+}
+
+/* Wait until Data Valid bit is set. */
+static bool rng_wait_ready(void)
+{
+ /* qemu_guest_getrandom may fail. Assume it won't fail 10 times in a row. */
+ int retries = 10;
+
+ while (retries-- > 0) {
+ if (rng_readb(RNGCS) & DVALID) {
+ return true;
+ }
+ }
+
+ return false;
+}
+
+/*
+ * Perform a frequency (monobit) test, as defined by NIST SP 800-22, on the
+ * sequence in buf and return the P-value. This represents the probability of a
+ * truly random sequence having the same proportion of zeros and ones as the
+ * sequence in buf.
+ *
+ * An RNG which always returns 0x00 or 0xff, or has some bits stuck at 0 or 1,
+ * will fail this test. However, an RNG which always returns 0x55, 0xf0 or some
+ * other value with an equal number of zeroes and ones will pass.
+ */
+static double calc_monobit_p(const uint8_t *buf, unsigned int len)
+{
+ unsigned int i;
+ double s_obs;
+ int sn = 0;
+
+ for (i = 0; i < len; i++) {
+ /*
+ * Each 1 counts as 1, each 0 counts as -1.
+ * s = cp - (8 - cp) = 2 * cp - 8
+ */
+ sn += 2 * ctpop8(buf[i]) - 8;
+ }
+
+ s_obs = abs(sn) / sqrt(len * BITS_PER_BYTE);
+
+ return erfc(s_obs / sqrt(2));
+}
+
+/*
+ * Perform a runs test, as defined by NIST SP 800-22, and return the P-value.
+ * This represents the probability of a truly random sequence having the same
+ * number of runs (i.e. uninterrupted sequences of identical bits) as the
+ * sequence in buf.
+ */
+static double calc_runs_p(const unsigned long *buf, unsigned int nr_bits)
+{
+ unsigned int j;
+ unsigned int k;
+ int nr_ones = 0;
+ int vn_obs = 0;
+ double pi;
+
+ g_assert(nr_bits % BITS_PER_LONG == 0);
+
+ for (j = 0; j < nr_bits / BITS_PER_LONG; j++) {
+ nr_ones += __builtin_popcountl(buf[j]);
+ }
+ pi = (double)nr_ones / nr_bits;
+
+ for (k = 0; k < nr_bits - 1; k++) {
+ vn_obs += !(test_bit(k, buf) ^ test_bit(k + 1, buf));
+ }
+ vn_obs += 1;
+
+ return erfc(fabs(vn_obs - 2 * nr_bits * pi * (1.0 - pi))
+ / (2 * sqrt(2 * nr_bits) * pi * (1.0 - pi)));
+}
+
+/*
+ * Verifies that DVALID is clear, and RNGD reads zero, when RNGE is cleared,
+ * and DVALID eventually becomes set when RNGE is set.
+ */
+static void test_enable_disable(void)
+{
+ /* Disable: DVALID should not be set, and RNGD should read zero */
+ rng_reset();
+ g_assert_cmphex(rng_readb(RNGCS), ==, 0);
+ g_assert_cmphex(rng_readb(RNGD), ==, 0);
+
+ /* Enable: DVALID should be set, but we can't make assumptions about RNGD */
+ rng_writeb(RNGCS, RNGE);
+ g_assert_true(rng_wait_ready());
+ g_assert_cmphex(rng_readb(RNGCS), ==, DVALID | RNGE);
+
+ /* Disable: DVALID should not be set, and RNGD should read zero */
+ rng_writeb(RNGCS, 0);
+ g_assert_cmphex(rng_readb(RNGCS), ==, 0);
+ g_assert_cmphex(rng_readb(RNGD), ==, 0);
+}
+
+/*
+ * Verifies that the RNG only produces data when RNGMODE is set to 'normal'
+ * ring oscillator mode.
+ */
+static void test_rosel(void)
+{
+ rng_reset_enable();
+ g_assert_true(rng_wait_ready());
+ rng_writeb(RNGMODE, 0);
+ g_assert_false(rng_wait_ready());
+ rng_writeb(RNGMODE, ROSEL_NORMAL);
+ g_assert_true(rng_wait_ready());
+ rng_writeb(RNGMODE, 0);
+ g_assert_false(rng_wait_ready());
+}
+
+/*
+ * Verifies that a continuous sequence of bits collected after enabling the RNG
+ * satisfies a monobit test.
+ */
+static void test_continuous_monobit(void)
+{
+ uint8_t buf[TEST_INPUT_BITS / BITS_PER_BYTE];
+ unsigned int i;
+
+ rng_reset_enable();
+ for (i = 0; i < sizeof(buf); i++) {
+ g_assert_true(rng_wait_ready());
+ buf[i] = rng_readb(RNGD);
+ }
+
+ g_assert_cmpfloat(calc_monobit_p(buf, sizeof(buf)), >, 0.01);
+}
+
+/*
+ * Verifies that a continuous sequence of bits collected after enabling the RNG
+ * satisfies a runs test.
+ */
+static void test_continuous_runs(void)
+{
+ union {
+ unsigned long l[TEST_INPUT_BITS / BITS_PER_LONG];
+ uint8_t c[TEST_INPUT_BITS / BITS_PER_BYTE];
+ } buf;
+ unsigned int i;
+
+ rng_reset_enable();
+ for (i = 0; i < sizeof(buf); i++) {
+ g_assert_true(rng_wait_ready());
+ buf.c[i] = rng_readb(RNGD);
+ }
+
+ g_assert_cmpfloat(calc_runs_p(buf.l, sizeof(buf) * BITS_PER_BYTE), >, 0.01);
+}
+
+/*
+ * Verifies that the first data byte collected after enabling the RNG satisfies
+ * a monobit test.
+ */
+static void test_first_byte_monobit(void)
+{
+ /* Enable, collect one byte, disable. Repeat until we have 100 bits. */
+ uint8_t buf[TEST_INPUT_BITS / BITS_PER_BYTE];
+ unsigned int i;
+
+ rng_reset();
+ for (i = 0; i < sizeof(buf); i++) {
+ rng_writeb(RNGCS, RNGE);
+ g_assert_true(rng_wait_ready());
+ buf[i] = rng_readb(RNGD);
+ rng_writeb(RNGCS, 0);
+ }
+
+ g_assert_cmpfloat(calc_monobit_p(buf, sizeof(buf)), >, 0.01);
+}
+
+/*
+ * Verifies that the first data byte collected after enabling the RNG satisfies
+ * a runs test.
+ */
+static void test_first_byte_runs(void)
+{
+ /* Enable, collect one byte, disable. Repeat until we have 100 bits. */
+ union {
+ unsigned long l[TEST_INPUT_BITS / BITS_PER_LONG];
+ uint8_t c[TEST_INPUT_BITS / BITS_PER_BYTE];
+ } buf;
+ unsigned int i;
+
+ rng_reset();
+ for (i = 0; i < sizeof(buf); i++) {
+ rng_writeb(RNGCS, RNGE);
+ g_assert_true(rng_wait_ready());
+ buf.c[i] = rng_readb(RNGD);
+ rng_writeb(RNGCS, 0);
+ }
+
+ g_assert_cmpfloat(calc_runs_p(buf.l, sizeof(buf) * BITS_PER_BYTE), >, 0.01);
+}
+
+int main(int argc, char **argv)
+{
+ int ret;
+
+ g_test_init(&argc, &argv, NULL);
+ g_test_set_nonfatal_assertions();
+
+ qtest_add_func("npcm7xx_rng/enable_disable", test_enable_disable);
+ qtest_add_func("npcm7xx_rng/rosel", test_rosel);
+ qtest_add_func("npcm7xx_rng/continuous/monobit", test_continuous_monobit);
+ qtest_add_func("npcm7xx_rng/continuous/runs", test_continuous_runs);
+ qtest_add_func("npcm7xx_rng/first_byte/monobit", test_first_byte_monobit);
+ qtest_add_func("npcm7xx_rng/first_byte/runs", test_first_byte_runs);
+
+ qtest_start("-machine npcm750-evb");
+ ret = g_test_run();
+ qtest_end();
+
+ return ret;
+}
diff --git a/hw/misc/meson.build b/hw/misc/meson.build
index 793d45b1dc..7ffb44b587 100644
--- a/hw/misc/meson.build
+++ b/hw/misc/meson.build
@@ -59,6 +59,7 @@ softmmu_ss.add(when: 'CONFIG_MAINSTONE', if_true: files('mst_fpga.c'))
softmmu_ss.add(when: 'CONFIG_NPCM7XX', if_true: files(
'npcm7xx_clk.c',
'npcm7xx_gcr.c',
+ 'npcm7xx_rng.c',
))
softmmu_ss.add(when: 'CONFIG_OMAP', if_true: files(
'omap_clk.c',
diff --git a/hw/misc/trace-events b/hw/misc/trace-events
index 6054f9adf3..b2f060ad77 100644
--- a/hw/misc/trace-events
+++ b/hw/misc/trace-events
@@ -118,6 +118,10 @@ npcm7xx_clk_write(uint64_t offset, uint32_t value) "offset: 0x%04" PRIx64 " valu
npcm7xx_gcr_read(uint64_t offset, uint32_t value) " offset: 0x%04" PRIx64 " value: 0x%08" PRIx32
npcm7xx_gcr_write(uint64_t offset, uint32_t value) "offset: 0x%04" PRIx64 " value: 0x%08" PRIx32
+# npcm7xx_rng.c
+npcm7xx_rng_read(uint64_t offset, uint64_t value, unsigned size) "offset: 0x%04" PRIx64 " value: 0x%02" PRIx64 " size: %u"
+npcm7xx_rng_write(uint64_t offset, uint64_t value, unsigned size) "offset: 0x%04" PRIx64 " value: 0x%02" PRIx64 " size: %u"
+
# stm32f4xx_syscfg.c
stm32f4xx_syscfg_set_irq(int gpio, int line, int level) "Interupt: GPIO: %d, Line: %d; Level: %d"
stm32f4xx_pulse_exti(int irq) "Pulse EXTI: %d"
diff --git a/tests/qtest/meson.build b/tests/qtest/meson.build
index 03e4f116b6..796553e16e 100644
--- a/tests/qtest/meson.build
+++ b/tests/qtest/meson.build
@@ -139,6 +139,7 @@ qtests_arm = \
'm25p80-test',
'npcm7xx_timer-test',
'npcm7xx_watchdog_timer-test',
+ 'npcm7xx_rng-test',
'test-arm-mptimer',
'boot-serial-test',
'hexloader-test']
--
2.28.0.1011.ga647a8990f-goog
^ permalink raw reply related [flat|nested] 14+ messages in thread* Re: [PATCH 4/6] hw/misc: Add npcm7xx random number generator
2020-10-08 23:21 ` [PATCH 4/6] hw/misc: Add npcm7xx random number generator Havard Skinnemoen via
@ 2020-10-20 13:02 ` Peter Maydell
2020-10-20 23:40 ` Havard Skinnemoen
0 siblings, 1 reply; 14+ messages in thread
From: Peter Maydell @ 2020-10-20 13:02 UTC (permalink / raw)
To: Havard Skinnemoen
Cc: Philippe Mathieu-Daudé,
QEMU Developers, CS20 KFTing, qemu-arm, Cédric Le Goater,
IS20 Avi Fishman
On Fri, 9 Oct 2020 at 00:22, Havard Skinnemoen <hskinnemoen@google.com> wrote:
>
> The RNG module returns a byte of randomness when the Data Valid bit is
> set.
>
> This implementation ignores the prescaler setting, and loads a new value
> into RNGD every time RNGCS is read while the RNG is enabled and random
> data is available.
>
> A qtest featuring some simple randomness tests is included.
>
> Reviewed-by: Tyrone Ting <kfting@nuvoton.com>
> Signed-off-by: Havard Skinnemoen <hskinnemoen@google.com>
> +static const VMStateDescription vmstate_npcm7xx_rng = {
> + .name = "npcm7xx-rng",
> + .version_id = 0,
> + .minimum_version_id = 0,
> + .fields = (VMStateField[]) {
> + VMSTATE_UINT8(rngcs, NPCM7xxRNGState),
> + VMSTATE_UINT8(rngd, NPCM7xxRNGState),
> + VMSTATE_UINT8(rngmode, NPCM7xxRNGState),
> + },
This is missing the VMSTATE_END_OF_LIST() terminator.
> +};
> +
> --- /dev/null
> +++ b/tests/qtest/npcm7xx_rng-test.c
> @@ -0,0 +1,278 @@
> +/*
> + * QTest testcase for the Nuvoton NPCM7xx Random Number Generator
> + *
> + * Copyright 2020 Google LLC
> + *
> + * This program is free software; you can redistribute it and/or modify it
> + * under the terms of the GNU General Public License as published by the
> + * Free Software Foundation; either version 2 of the License, or
> + * (at your option) any later version.
> + *
> + * This program is distributed in the hope that it will be useful, but WITHOUT
> + * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
> + * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
> + * for more details.
> + */
> +
> +#include <math.h>
> +
> +#include "qemu/osdep.h"
osdep.h must always be the first #include line, before anything
else, including system includes.
> + * Verifies that the first data byte collected after enabling the RNG satisfies
> + * a monobit test.
Some of this "is this really a random number" testing seems a bit
overkill given that the RNG device is just plumbing through the
qemu_guest_getrandom() result, but since you've written the code
we may as well keep it :-)
If you fix the #include order and the missing terminator then
Reviewed-by: Peter Maydell <peter.maydell@linaro.org>
thanks
-- PMM
^ permalink raw reply [flat|nested] 14+ messages in thread* Re: [PATCH 4/6] hw/misc: Add npcm7xx random number generator
2020-10-20 13:02 ` Peter Maydell
@ 2020-10-20 23:40 ` Havard Skinnemoen
0 siblings, 0 replies; 14+ messages in thread
From: Havard Skinnemoen @ 2020-10-20 23:40 UTC (permalink / raw)
To: Peter Maydell
Cc: QEMU Developers, qemu-arm, IS20 Avi Fishman, CS20 KFTing,
Philippe Mathieu-Daudé,
Cédric Le Goater
On Tue, Oct 20, 2020 at 6:02 AM Peter Maydell <peter.maydell@linaro.org> wrote:
>
> On Fri, 9 Oct 2020 at 00:22, Havard Skinnemoen <hskinnemoen@google.com> wrote:
> >
> > The RNG module returns a byte of randomness when the Data Valid bit is
> > set.
> >
> > This implementation ignores the prescaler setting, and loads a new value
> > into RNGD every time RNGCS is read while the RNG is enabled and random
> > data is available.
> >
> > A qtest featuring some simple randomness tests is included.
> >
> > Reviewed-by: Tyrone Ting <kfting@nuvoton.com>
> > Signed-off-by: Havard Skinnemoen <hskinnemoen@google.com>
>
>
> > +static const VMStateDescription vmstate_npcm7xx_rng = {
> > + .name = "npcm7xx-rng",
> > + .version_id = 0,
> > + .minimum_version_id = 0,
> > + .fields = (VMStateField[]) {
> > + VMSTATE_UINT8(rngcs, NPCM7xxRNGState),
> > + VMSTATE_UINT8(rngd, NPCM7xxRNGState),
> > + VMSTATE_UINT8(rngmode, NPCM7xxRNGState),
> > + },
>
> This is missing the VMSTATE_END_OF_LIST() terminator.
>
> > +};
> > +
>
> > --- /dev/null
> > +++ b/tests/qtest/npcm7xx_rng-test.c
> > @@ -0,0 +1,278 @@
> > +/*
> > + * QTest testcase for the Nuvoton NPCM7xx Random Number Generator
> > + *
> > + * Copyright 2020 Google LLC
> > + *
> > + * This program is free software; you can redistribute it and/or modify it
> > + * under the terms of the GNU General Public License as published by the
> > + * Free Software Foundation; either version 2 of the License, or
> > + * (at your option) any later version.
> > + *
> > + * This program is distributed in the hope that it will be useful, but WITHOUT
> > + * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
> > + * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
> > + * for more details.
> > + */
> > +
> > +#include <math.h>
> > +
> > +#include "qemu/osdep.h"
>
> osdep.h must always be the first #include line, before anything
> else, including system includes.
>
> > + * Verifies that the first data byte collected after enabling the RNG satisfies
> > + * a monobit test.
>
> Some of this "is this really a random number" testing seems a bit
> overkill given that the RNG device is just plumbing through the
> qemu_guest_getrandom() result, but since you've written the code
> we may as well keep it :-)
You may be right, though there were a couple of reasons why I added it.
One is that rngd was complaining about /dev/hwrng failing randomness
tests, so I wanted to make sure my device wasn't doing anything to
ruin the randomness. In the end, it turned out to be a kernel bug:
https://lkml.org/lkml/2020/9/23/1021
Another reason is that the value from qemu_guest_getrandom() isn't
consumed directly when reading the data register; it's latched when
reading the status register and returned on the next read from the
data register. So it's possible to imagine a bug causing the same
value to be returned over and over, which should cause the randomness
test to fail.
> If you fix the #include order and the missing terminator then
Will do, thanks!
> Reviewed-by: Peter Maydell <peter.maydell@linaro.org>
>
> thanks
> -- PMM
^ permalink raw reply [flat|nested] 14+ messages in thread
* [PATCH 5/6] hw/arm/npcm7xx: Add EHCI and OHCI controllers
2020-10-08 23:21 [PATCH 0/6] Additional NPCM7xx features, devices and tests Havard Skinnemoen via
` (3 preceding siblings ...)
2020-10-08 23:21 ` [PATCH 4/6] hw/misc: Add npcm7xx random number generator Havard Skinnemoen via
@ 2020-10-08 23:21 ` Havard Skinnemoen via
2020-10-13 7:05 ` Gerd Hoffmann
2020-10-08 23:21 ` [PATCH 6/6] hw/gpio: Add GPIO model for Nuvoton NPCM7xx Havard Skinnemoen via
2020-10-20 13:12 ` [PATCH 0/6] Additional NPCM7xx features, devices and tests Peter Maydell
6 siblings, 1 reply; 14+ messages in thread
From: Havard Skinnemoen via @ 2020-10-08 23:21 UTC (permalink / raw)
To: qemu-devel
Cc: qemu-arm, peter.maydell, Avi.Fishman, kfting, f4bug, clg,
Havard Skinnemoen, Gerd Hoffmann
The NPCM730 and NPCM750 chips have a single USB host port shared between
a USB 2.0 EHCI host controller and a USB 1.1 OHCI host controller. This
adds support for both of them.
Testing notes:
* With -device usb-kbd, qemu will automatically insert a full-speed
hub, and the keyboard becomes controlled by the OHCI controller.
* With -device usb-kbd,bus=usb-bus.0,port=1, the keyboard is directly
attached to the port without any hubs, and the device becomes
controlled by the EHCI controller since it's high speed capable.
* With -device usb-kbd,bus=usb-bus.0,port=1,usb_version=1, the
keyboard is directly attached to the port, but it only advertises
itself as full-speed capable, so it becomes controlled by the OHCI
controller.
In all cases, the keyboard device enumerates correctly.
Cc: Gerd Hoffmann <kraxel@redhat.com>
Reviewed-by: Tyrone Ting <kfting@nuvoton.com>
Signed-off-by: Havard Skinnemoen <hskinnemoen@google.com>
---
docs/system/arm/nuvoton.rst | 2 +-
hw/usb/hcd-ehci.h | 1 +
include/hw/arm/npcm7xx.h | 4 ++++
hw/arm/npcm7xx.c | 27 +++++++++++++++++++++++++--
hw/usb/hcd-ehci-sysbus.c | 19 +++++++++++++++++++
5 files changed, 50 insertions(+), 3 deletions(-)
diff --git a/docs/system/arm/nuvoton.rst b/docs/system/arm/nuvoton.rst
index 4342434df4..99fc61c740 100644
--- a/docs/system/arm/nuvoton.rst
+++ b/docs/system/arm/nuvoton.rst
@@ -39,6 +39,7 @@ Supported devices
* OTP controllers (no protection features)
* Flash Interface Unit (FIU; no protection features)
* Random Number Generator (RNG)
+ * USB host (USBH)
Missing devices
---------------
@@ -54,7 +55,6 @@ Missing devices
* eSPI slave interface
* Ethernet controllers (GMAC and EMC)
- * USB host (USBH)
* USB device (USBD)
* SMBus controller (SMBF)
* Peripheral SPI controller (PSPI)
diff --git a/hw/usb/hcd-ehci.h b/hw/usb/hcd-ehci.h
index fd122dd4cd..a173707d9b 100644
--- a/hw/usb/hcd-ehci.h
+++ b/hw/usb/hcd-ehci.h
@@ -344,6 +344,7 @@ struct EHCIPCIState {
#define TYPE_PLATFORM_EHCI "platform-ehci-usb"
#define TYPE_EXYNOS4210_EHCI "exynos4210-ehci-usb"
#define TYPE_AW_H3_EHCI "aw-h3-ehci-usb"
+#define TYPE_NPCM7XX_EHCI "npcm7xx-ehci-usb"
#define TYPE_TEGRA2_EHCI "tegra2-ehci-usb"
#define TYPE_PPC4xx_EHCI "ppc4xx-ehci-usb"
#define TYPE_FUSBH200_EHCI "fusbh200-ehci-usb"
diff --git a/include/hw/arm/npcm7xx.h b/include/hw/arm/npcm7xx.h
index 761f9b987e..aeee1beaaa 100644
--- a/include/hw/arm/npcm7xx.h
+++ b/include/hw/arm/npcm7xx.h
@@ -25,6 +25,8 @@
#include "hw/nvram/npcm7xx_otp.h"
#include "hw/timer/npcm7xx_timer.h"
#include "hw/ssi/npcm7xx_fiu.h"
+#include "hw/usb/hcd-ehci.h"
+#include "hw/usb/hcd-ohci.h"
#include "target/arm/cpu.h"
#define NPCM7XX_MAX_NUM_CPUS (2)
@@ -77,6 +79,8 @@ typedef struct NPCM7xxState {
NPCM7xxOTPState fuse_array;
NPCM7xxMCState mc;
NPCM7xxRNGState rng;
+ EHCISysBusState ehci;
+ OHCISysBusState ohci;
NPCM7xxFIUState fiu[2];
} NPCM7xxState;
diff --git a/hw/arm/npcm7xx.c b/hw/arm/npcm7xx.c
index c4bbf3c7d5..ab37442d9c 100644
--- a/hw/arm/npcm7xx.c
+++ b/hw/arm/npcm7xx.c
@@ -46,6 +46,10 @@
#define NPCM7XX_MC_BA (0xf0824000)
#define NPCM7XX_RNG_BA (0xf000b000)
+/* USB Host modules */
+#define NPCM7XX_EHCI_BA (0xf0806000)
+#define NPCM7XX_OHCI_BA (0xf0807000)
+
/* Internal AHB SRAM */
#define NPCM7XX_RAM3_BA (0xc0008000)
#define NPCM7XX_RAM3_SZ (4 * KiB)
@@ -90,6 +94,8 @@ enum NPCM7xxInterrupt {
NPCM7XX_WDG0_IRQ = 47, /* Timer Module 0 Watchdog */
NPCM7XX_WDG1_IRQ, /* Timer Module 1 Watchdog */
NPCM7XX_WDG2_IRQ, /* Timer Module 2 Watchdog */
+ NPCM7XX_EHCI_IRQ = 61,
+ NPCM7XX_OHCI_IRQ = 62,
};
/* Total number of GIC interrupts, including internal Cortex-A9 interrupts. */
@@ -263,6 +269,9 @@ static void npcm7xx_init(Object *obj)
object_initialize_child(obj, "tim[*]", &s->tim[i], TYPE_NPCM7XX_TIMER);
}
+ object_initialize_child(obj, "ehci", &s->ehci, TYPE_NPCM7XX_EHCI);
+ object_initialize_child(obj, "ohci", &s->ohci, TYPE_SYSBUS_OHCI);
+
QEMU_BUILD_BUG_ON(ARRAY_SIZE(npcm7xx_fiu) != ARRAY_SIZE(s->fiu));
for (i = 0; i < ARRAY_SIZE(s->fiu); i++) {
object_initialize_child(obj, npcm7xx_fiu[i].name, &s->fiu[i],
@@ -379,6 +388,22 @@ static void npcm7xx_realize(DeviceState *dev, Error **errp)
sysbus_realize(SYS_BUS_DEVICE(&s->rng), &error_abort);
sysbus_mmio_map(SYS_BUS_DEVICE(&s->rng), 0, NPCM7XX_RNG_BA);
+ /* USB Host */
+ object_property_set_bool(OBJECT(&s->ehci), "companion-enable", true,
+ &error_abort);
+ sysbus_realize(SYS_BUS_DEVICE(&s->ehci), &error_abort);
+ sysbus_mmio_map(SYS_BUS_DEVICE(&s->ehci), 0, NPCM7XX_EHCI_BA);
+ sysbus_connect_irq(SYS_BUS_DEVICE(&s->ehci), 0,
+ npcm7xx_irq(s, NPCM7XX_EHCI_IRQ));
+
+ object_property_set_str(OBJECT(&s->ohci), "masterbus", "usb-bus.0",
+ &error_abort);
+ object_property_set_uint(OBJECT(&s->ohci), "num-ports", 1, &error_abort);
+ sysbus_realize(SYS_BUS_DEVICE(&s->ohci), &error_abort);
+ sysbus_mmio_map(SYS_BUS_DEVICE(&s->ohci), 0, NPCM7XX_OHCI_BA);
+ sysbus_connect_irq(SYS_BUS_DEVICE(&s->ohci), 0,
+ npcm7xx_irq(s, NPCM7XX_OHCI_IRQ));
+
/*
* Flash Interface Unit (FIU). Can fail if incorrect number of chip selects
* specified, but this is a programming error.
@@ -463,8 +488,6 @@ static void npcm7xx_realize(DeviceState *dev, Error **errp)
create_unimplemented_device("npcm7xx.mcphy", 0xf05f0000, 64 * KiB);
create_unimplemented_device("npcm7xx.gmac1", 0xf0802000, 8 * KiB);
create_unimplemented_device("npcm7xx.gmac2", 0xf0804000, 8 * KiB);
- create_unimplemented_device("npcm7xx.ehci", 0xf0806000, 4 * KiB);
- create_unimplemented_device("npcm7xx.ohci", 0xf0807000, 4 * KiB);
create_unimplemented_device("npcm7xx.vcd", 0xf0810000, 64 * KiB);
create_unimplemented_device("npcm7xx.ece", 0xf0820000, 8 * KiB);
create_unimplemented_device("npcm7xx.vdma", 0xf0822000, 8 * KiB);
diff --git a/hw/usb/hcd-ehci-sysbus.c b/hw/usb/hcd-ehci-sysbus.c
index 3730736540..e3758db1b1 100644
--- a/hw/usb/hcd-ehci-sysbus.c
+++ b/hw/usb/hcd-ehci-sysbus.c
@@ -147,6 +147,24 @@ static const TypeInfo ehci_aw_h3_type_info = {
.class_init = ehci_aw_h3_class_init,
};
+static void ehci_npcm7xx_class_init(ObjectClass *oc, void *data)
+{
+ SysBusEHCIClass *sec = SYS_BUS_EHCI_CLASS(oc);
+ DeviceClass *dc = DEVICE_CLASS(oc);
+
+ sec->capsbase = 0x0;
+ sec->opregbase = 0x10;
+ sec->portscbase = 0x44;
+ sec->portnr = 1;
+ set_bit(DEVICE_CATEGORY_USB, dc->categories);
+}
+
+static const TypeInfo ehci_npcm7xx_type_info = {
+ .name = TYPE_NPCM7XX_EHCI,
+ .parent = TYPE_SYS_BUS_EHCI,
+ .class_init = ehci_npcm7xx_class_init,
+};
+
static void ehci_tegra2_class_init(ObjectClass *oc, void *data)
{
SysBusEHCIClass *sec = SYS_BUS_EHCI_CLASS(oc);
@@ -269,6 +287,7 @@ static void ehci_sysbus_register_types(void)
type_register_static(&ehci_platform_type_info);
type_register_static(&ehci_exynos4210_type_info);
type_register_static(&ehci_aw_h3_type_info);
+ type_register_static(&ehci_npcm7xx_type_info);
type_register_static(&ehci_tegra2_type_info);
type_register_static(&ehci_ppc4xx_type_info);
type_register_static(&ehci_fusbh200_type_info);
--
2.28.0.1011.ga647a8990f-goog
^ permalink raw reply related [flat|nested] 14+ messages in thread* Re: [PATCH 5/6] hw/arm/npcm7xx: Add EHCI and OHCI controllers
2020-10-08 23:21 ` [PATCH 5/6] hw/arm/npcm7xx: Add EHCI and OHCI controllers Havard Skinnemoen via
@ 2020-10-13 7:05 ` Gerd Hoffmann
0 siblings, 0 replies; 14+ messages in thread
From: Gerd Hoffmann @ 2020-10-13 7:05 UTC (permalink / raw)
To: Havard Skinnemoen
Cc: peter.maydell, f4bug, qemu-devel, kfting, qemu-arm, Avi.Fishman, clg
On Thu, Oct 08, 2020 at 04:21:53PM -0700, Havard Skinnemoen wrote:
> The NPCM730 and NPCM750 chips have a single USB host port shared between
> a USB 2.0 EHCI host controller and a USB 1.1 OHCI host controller. This
> adds support for both of them.
>
> Testing notes:
> * With -device usb-kbd, qemu will automatically insert a full-speed
> hub, and the keyboard becomes controlled by the OHCI controller.
> * With -device usb-kbd,bus=usb-bus.0,port=1, the keyboard is directly
> attached to the port without any hubs, and the device becomes
> controlled by the EHCI controller since it's high speed capable.
> * With -device usb-kbd,bus=usb-bus.0,port=1,usb_version=1, the
> keyboard is directly attached to the port, but it only advertises
> itself as full-speed capable, so it becomes controlled by the OHCI
> controller.
>
> In all cases, the keyboard device enumerates correctly.
Looks good. Goes through the arm queue I guess?
Reviewed-by: Gerd Hoffmann <kraxel@redhat.com>
take care,
Gerd
^ permalink raw reply [flat|nested] 14+ messages in thread
* [PATCH 6/6] hw/gpio: Add GPIO model for Nuvoton NPCM7xx
2020-10-08 23:21 [PATCH 0/6] Additional NPCM7xx features, devices and tests Havard Skinnemoen via
` (4 preceding siblings ...)
2020-10-08 23:21 ` [PATCH 5/6] hw/arm/npcm7xx: Add EHCI and OHCI controllers Havard Skinnemoen via
@ 2020-10-08 23:21 ` Havard Skinnemoen via
2020-10-20 13:07 ` Peter Maydell
2020-10-20 13:12 ` [PATCH 0/6] Additional NPCM7xx features, devices and tests Peter Maydell
6 siblings, 1 reply; 14+ messages in thread
From: Havard Skinnemoen via @ 2020-10-08 23:21 UTC (permalink / raw)
To: qemu-devel
Cc: qemu-arm, peter.maydell, Avi.Fishman, kfting, f4bug, clg,
Havard Skinnemoen
The NPCM7xx chips have multiple GPIO controllers that are mostly
identical except for some minor differences like the reset values of
some registers. Each controller controls up to 32 pins.
Each individual pin is modeled as a pair of unnamed GPIOs -- one for
emitting the actual pin state, and one for driving the pin externally.
Like the nRF51 GPIO controller, a gpio level may be negative, which
means the pin is not driven, or floating.
Reviewed-by: Tyrone Ting <kfting@nuvoton.com>
Signed-off-by: Havard Skinnemoen <hskinnemoen@google.com>
---
docs/system/arm/nuvoton.rst | 2 +-
include/hw/arm/npcm7xx.h | 2 +
include/hw/gpio/npcm7xx_gpio.h | 55 +++++
hw/arm/npcm7xx.c | 80 +++++++
hw/gpio/npcm7xx_gpio.c | 409 ++++++++++++++++++++++++++++++++
tests/qtest/npcm7xx_gpio-test.c | 385 ++++++++++++++++++++++++++++++
hw/gpio/meson.build | 1 +
hw/gpio/trace-events | 7 +
tests/qtest/meson.build | 1 +
9 files changed, 941 insertions(+), 1 deletion(-)
create mode 100644 include/hw/gpio/npcm7xx_gpio.h
create mode 100644 hw/gpio/npcm7xx_gpio.c
create mode 100644 tests/qtest/npcm7xx_gpio-test.c
diff --git a/docs/system/arm/nuvoton.rst b/docs/system/arm/nuvoton.rst
index 99fc61c740..b00d405d52 100644
--- a/docs/system/arm/nuvoton.rst
+++ b/docs/system/arm/nuvoton.rst
@@ -40,11 +40,11 @@ Supported devices
* Flash Interface Unit (FIU; no protection features)
* Random Number Generator (RNG)
* USB host (USBH)
+ * GPIO controller
Missing devices
---------------
- * GPIO controller
* LPC/eSPI host-to-BMC interface, including
* Keyboard and mouse controller interface (KBCI)
diff --git a/include/hw/arm/npcm7xx.h b/include/hw/arm/npcm7xx.h
index aeee1beaaa..5469247e38 100644
--- a/include/hw/arm/npcm7xx.h
+++ b/include/hw/arm/npcm7xx.h
@@ -18,6 +18,7 @@
#include "hw/boards.h"
#include "hw/cpu/a9mpcore.h"
+#include "hw/gpio/npcm7xx_gpio.h"
#include "hw/mem/npcm7xx_mc.h"
#include "hw/misc/npcm7xx_clk.h"
#include "hw/misc/npcm7xx_gcr.h"
@@ -79,6 +80,7 @@ typedef struct NPCM7xxState {
NPCM7xxOTPState fuse_array;
NPCM7xxMCState mc;
NPCM7xxRNGState rng;
+ NPCM7xxGPIOState gpio[8];
EHCISysBusState ehci;
OHCISysBusState ohci;
NPCM7xxFIUState fiu[2];
diff --git a/include/hw/gpio/npcm7xx_gpio.h b/include/hw/gpio/npcm7xx_gpio.h
new file mode 100644
index 0000000000..b1d771bd77
--- /dev/null
+++ b/include/hw/gpio/npcm7xx_gpio.h
@@ -0,0 +1,55 @@
+/*
+ * Nuvoton NPCM7xx General Purpose Input / Output (GPIO)
+ *
+ * Copyright 2020 Google LLC
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * version 2 as published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ */
+#ifndef NPCM7XX_GPIO_H
+#define NPCM7XX_GPIO_H
+
+#include "exec/memory.h"
+#include "hw/sysbus.h"
+
+/* Number of pins managed by each controller. */
+#define NPCM7XX_GPIO_NR_PINS (32)
+
+/*
+ * Number of registers in our device state structure. Don't change this without
+ * incrementing the version_id in the vmstate.
+ */
+#define NPCM7XX_GPIO_NR_REGS (0x80 / sizeof(uint32_t))
+
+typedef struct NPCM7xxGPIOState {
+ SysBusDevice parent;
+
+ /* Properties to be defined by the SoC */
+ uint32_t reset_pu;
+ uint32_t reset_pd;
+ uint32_t reset_osrc;
+ uint32_t reset_odsc;
+
+ MemoryRegion mmio;
+
+ qemu_irq irq;
+ qemu_irq output[NPCM7XX_GPIO_NR_PINS];
+
+ uint32_t pin_level;
+ uint32_t ext_level;
+ uint32_t ext_driven;
+
+ uint32_t regs[NPCM7XX_GPIO_NR_REGS];
+} NPCM7xxGPIOState;
+
+#define TYPE_NPCM7XX_GPIO "npcm7xx-gpio"
+#define NPCM7XX_GPIO(obj) \
+ OBJECT_CHECK(NPCM7xxGPIOState, (obj), TYPE_NPCM7XX_GPIO)
+
+#endif /* NPCM7XX_GPIO_H */
diff --git a/hw/arm/npcm7xx.c b/hw/arm/npcm7xx.c
index ab37442d9c..67a552c279 100644
--- a/hw/arm/npcm7xx.c
+++ b/hw/arm/npcm7xx.c
@@ -96,6 +96,14 @@ enum NPCM7xxInterrupt {
NPCM7XX_WDG2_IRQ, /* Timer Module 2 Watchdog */
NPCM7XX_EHCI_IRQ = 61,
NPCM7XX_OHCI_IRQ = 62,
+ NPCM7XX_GPIO0_IRQ = 116,
+ NPCM7XX_GPIO1_IRQ,
+ NPCM7XX_GPIO2_IRQ,
+ NPCM7XX_GPIO3_IRQ,
+ NPCM7XX_GPIO4_IRQ,
+ NPCM7XX_GPIO5_IRQ,
+ NPCM7XX_GPIO6_IRQ,
+ NPCM7XX_GPIO7_IRQ,
};
/* Total number of GIC interrupts, including internal Cortex-A9 interrupts. */
@@ -130,6 +138,55 @@ static const hwaddr npcm7xx_fiu3_flash_addr[] = {
0xb8000000, /* CS3 */
};
+static const struct {
+ hwaddr regs_addr;
+ uint32_t unconnected_pins;
+ uint32_t reset_pu;
+ uint32_t reset_pd;
+ uint32_t reset_osrc;
+ uint32_t reset_odsc;
+} npcm7xx_gpio[] = {
+ {
+ .regs_addr = 0xf0010000,
+ .reset_pu = 0xff03ffff,
+ .reset_pd = 0x00fc0000,
+ }, {
+ .regs_addr = 0xf0011000,
+ .unconnected_pins = 0x0000001e,
+ .reset_pu = 0xfefffe07,
+ .reset_pd = 0x010001e0,
+ }, {
+ .regs_addr = 0xf0012000,
+ .reset_pu = 0x780fffff,
+ .reset_pd = 0x07f00000,
+ .reset_odsc = 0x00700000,
+ }, {
+ .regs_addr = 0xf0013000,
+ .reset_pu = 0x00fc0000,
+ .reset_pd = 0xff000000,
+ }, {
+ .regs_addr = 0xf0014000,
+ .reset_pu = 0xffffffff,
+ }, {
+ .regs_addr = 0xf0015000,
+ .reset_pu = 0xbf83f801,
+ .reset_pd = 0x007c0000,
+ .reset_osrc = 0x000000f1,
+ .reset_odsc = 0x3f9f80f1,
+ }, {
+ .regs_addr = 0xf0016000,
+ .reset_pu = 0xfc00f801,
+ .reset_pd = 0x000007fe,
+ .reset_odsc = 0x00000800,
+ }, {
+ .regs_addr = 0xf0017000,
+ .unconnected_pins = 0xffffff00,
+ .reset_pu = 0x0000007f,
+ .reset_osrc = 0x0000007f,
+ .reset_odsc = 0x0000007f,
+ },
+};
+
static const struct {
const char *name;
hwaddr regs_addr;
@@ -269,6 +326,10 @@ static void npcm7xx_init(Object *obj)
object_initialize_child(obj, "tim[*]", &s->tim[i], TYPE_NPCM7XX_TIMER);
}
+ for (i = 0; i < ARRAY_SIZE(s->gpio); i++) {
+ object_initialize_child(obj, "gpio[*]", &s->gpio[i], TYPE_NPCM7XX_GPIO);
+ }
+
object_initialize_child(obj, "ehci", &s->ehci, TYPE_NPCM7XX_EHCI);
object_initialize_child(obj, "ohci", &s->ohci, TYPE_SYSBUS_OHCI);
@@ -388,6 +449,25 @@ static void npcm7xx_realize(DeviceState *dev, Error **errp)
sysbus_realize(SYS_BUS_DEVICE(&s->rng), &error_abort);
sysbus_mmio_map(SYS_BUS_DEVICE(&s->rng), 0, NPCM7XX_RNG_BA);
+ /* GPIO modules. Cannot fail. */
+ QEMU_BUILD_BUG_ON(ARRAY_SIZE(npcm7xx_gpio) != ARRAY_SIZE(s->gpio));
+ for (i = 0; i < ARRAY_SIZE(s->gpio); i++) {
+ Object *obj = OBJECT(&s->gpio[i]);
+
+ object_property_set_uint(obj, "reset-pullup",
+ npcm7xx_gpio[i].reset_pu, &error_abort);
+ object_property_set_uint(obj, "reset-pulldown",
+ npcm7xx_gpio[i].reset_pd, &error_abort);
+ object_property_set_uint(obj, "reset-osrc",
+ npcm7xx_gpio[i].reset_osrc, &error_abort);
+ object_property_set_uint(obj, "reset-odsc",
+ npcm7xx_gpio[i].reset_odsc, &error_abort);
+ sysbus_realize(SYS_BUS_DEVICE(obj), &error_abort);
+ sysbus_mmio_map(SYS_BUS_DEVICE(obj), 0, npcm7xx_gpio[i].regs_addr);
+ sysbus_connect_irq(SYS_BUS_DEVICE(obj), 0,
+ npcm7xx_irq(s, NPCM7XX_GPIO0_IRQ + i));
+ }
+
/* USB Host */
object_property_set_bool(OBJECT(&s->ehci), "companion-enable", true,
&error_abort);
diff --git a/hw/gpio/npcm7xx_gpio.c b/hw/gpio/npcm7xx_gpio.c
new file mode 100644
index 0000000000..69b51cb151
--- /dev/null
+++ b/hw/gpio/npcm7xx_gpio.c
@@ -0,0 +1,409 @@
+/*
+ * Nuvoton NPCM7xx General Purpose Input / Output (GPIO)
+ *
+ * Copyright 2020 Google LLC
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * version 2 as published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ */
+
+#include "qemu/osdep.h"
+
+#include "hw/gpio/npcm7xx_gpio.h"
+#include "hw/irq.h"
+#include "hw/qdev-properties.h"
+#include "qapi/error.h"
+#include "qemu/log.h"
+#include "qemu/module.h"
+#include "qemu/units.h"
+#include "trace.h"
+
+/* 32-bit register indices. */
+enum NPCM7xxGPIORegister {
+ NPCM7XX_GPIO_TLOCK1,
+ NPCM7XX_GPIO_DIN,
+ NPCM7XX_GPIO_POL,
+ NPCM7XX_GPIO_DOUT,
+ NPCM7XX_GPIO_OE,
+ NPCM7XX_GPIO_OTYP,
+ NPCM7XX_GPIO_MP,
+ NPCM7XX_GPIO_PU,
+ NPCM7XX_GPIO_PD,
+ NPCM7XX_GPIO_DBNC,
+ NPCM7XX_GPIO_EVTYP,
+ NPCM7XX_GPIO_EVBE,
+ NPCM7XX_GPIO_OBL0,
+ NPCM7XX_GPIO_OBL1,
+ NPCM7XX_GPIO_OBL2,
+ NPCM7XX_GPIO_OBL3,
+ NPCM7XX_GPIO_EVEN,
+ NPCM7XX_GPIO_EVENS,
+ NPCM7XX_GPIO_EVENC,
+ NPCM7XX_GPIO_EVST,
+ NPCM7XX_GPIO_SPLCK,
+ NPCM7XX_GPIO_MPLCK,
+ NPCM7XX_GPIO_IEM,
+ NPCM7XX_GPIO_OSRC,
+ NPCM7XX_GPIO_ODSC,
+ NPCM7XX_GPIO_DOS = 0x68 / sizeof(uint32_t),
+ NPCM7XX_GPIO_DOC,
+ NPCM7XX_GPIO_OES,
+ NPCM7XX_GPIO_OEC,
+ NPCM7XX_GPIO_TLOCK2 = 0x7c / sizeof(uint32_t),
+ NPCM7XX_GPIO_REGS_END,
+};
+
+#define NPCM7XX_GPIO_REGS_SIZE (4 * KiB)
+
+#define NPCM7XX_GPIO_LOCK_MAGIC1 (0xc0defa73)
+#define NPCM7XX_GPIO_LOCK_MAGIC2 (0xc0de1248)
+
+static void npcm7xx_gpio_update_events(NPCM7xxGPIOState *s, uint32_t din_diff)
+{
+ uint32_t din_new = s->regs[NPCM7XX_GPIO_DIN];
+
+ /* Trigger on high level */
+ s->regs[NPCM7XX_GPIO_EVST] |= din_new & ~s->regs[NPCM7XX_GPIO_EVTYP];
+ /* Trigger on both edges */
+ s->regs[NPCM7XX_GPIO_EVST] |= (din_diff & s->regs[NPCM7XX_GPIO_EVTYP]
+ & s->regs[NPCM7XX_GPIO_EVBE]);
+ /* Trigger on rising edge */
+ s->regs[NPCM7XX_GPIO_EVST] |= (din_diff & din_new
+ & s->regs[NPCM7XX_GPIO_EVTYP]);
+
+ trace_npcm7xx_gpio_update_events(DEVICE(s)->canonical_path,
+ s->regs[NPCM7XX_GPIO_EVST],
+ s->regs[NPCM7XX_GPIO_EVEN]);
+ qemu_set_irq(s->irq, !!(s->regs[NPCM7XX_GPIO_EVST]
+ & s->regs[NPCM7XX_GPIO_EVEN]));
+}
+
+static void npcm7xx_gpio_update_pins(NPCM7xxGPIOState *s, uint32_t diff)
+{
+ uint32_t drive_en;
+ uint32_t drive_lvl;
+ uint32_t not_driven;
+ uint32_t undefined;
+ uint32_t pin_diff;
+ uint32_t din_old;
+
+ /* Calculate level of each pin driven by GPIO controller. */
+ drive_lvl = s->regs[NPCM7XX_GPIO_DOUT] ^ s->regs[NPCM7XX_GPIO_POL];
+ /* If OTYP=1, only drive low (open drain) */
+ drive_en = s->regs[NPCM7XX_GPIO_OE] & ~(s->regs[NPCM7XX_GPIO_OTYP]
+ & drive_lvl);
+ /*
+ * If a pin is driven to opposite levels by the GPIO controller and the
+ * external driver, the result is undefined.
+ */
+ undefined = drive_en & s->ext_driven & (drive_lvl ^ s->ext_level);
+ if (undefined) {
+ qemu_log_mask(LOG_GUEST_ERROR,
+ "%s: pins have multiple drivers: 0x%" PRIx32 "\n",
+ DEVICE(s)->canonical_path, undefined);
+ }
+
+ not_driven = ~(drive_en | s->ext_driven);
+ pin_diff = s->pin_level;
+
+ /* Set pins to externally driven level. */
+ s->pin_level = s->ext_level & s->ext_driven;
+ /* Set internally driven pins, ignoring any conflicts. */
+ s->pin_level |= drive_lvl & drive_en;
+ /* Pull up undriven pins with internal pull-up enabled. */
+ s->pin_level |= not_driven & s->regs[NPCM7XX_GPIO_PU];
+ /* Pins not driven, pulled up or pulled down are undefined */
+ undefined |= not_driven & ~(s->regs[NPCM7XX_GPIO_PU]
+ | s->regs[NPCM7XX_GPIO_PD]);
+
+ /* If any pins changed state, update the outgoing GPIOs. */
+ pin_diff ^= s->pin_level;
+ pin_diff |= undefined & diff;
+ if (pin_diff) {
+ int i;
+
+ for (i = 0; i < NPCM7XX_GPIO_NR_PINS; i++) {
+ uint32_t mask = BIT(i);
+ if (pin_diff & mask) {
+ int level = (undefined & mask) ? -1 : !!(s->pin_level & mask);
+ trace_npcm7xx_gpio_set_output(DEVICE(s)->canonical_path,
+ i, level);
+ qemu_set_irq(s->output[i], level);
+ }
+ }
+ }
+
+ /* Calculate new value of DIN after masking and polarity setting. */
+ din_old = s->regs[NPCM7XX_GPIO_DIN];
+ s->regs[NPCM7XX_GPIO_DIN] = ((s->pin_level & s->regs[NPCM7XX_GPIO_IEM])
+ ^ s->regs[NPCM7XX_GPIO_POL]);
+
+ /* See if any new events triggered because of all this. */
+ npcm7xx_gpio_update_events(s, din_old ^ s->regs[NPCM7XX_GPIO_DIN]);
+}
+
+static bool npcm7xx_gpio_is_locked(NPCM7xxGPIOState *s)
+{
+ return s->regs[NPCM7XX_GPIO_TLOCK1] == 1;
+}
+
+static uint64_t npcm7xx_gpio_regs_read(void *opaque, hwaddr addr,
+ unsigned int size)
+{
+ hwaddr reg = addr / sizeof(uint32_t);
+ NPCM7xxGPIOState *s = opaque;
+ uint64_t value = 0;
+
+ switch (reg) {
+ case NPCM7XX_GPIO_TLOCK1 ... NPCM7XX_GPIO_EVEN:
+ case NPCM7XX_GPIO_EVST ... NPCM7XX_GPIO_ODSC:
+ value = s->regs[reg];
+ break;
+
+ case NPCM7XX_GPIO_EVENS ... NPCM7XX_GPIO_EVENC:
+ case NPCM7XX_GPIO_DOS ... NPCM7XX_GPIO_TLOCK2:
+ qemu_log_mask(LOG_GUEST_ERROR,
+ "%s: read from write-only register 0x%" HWADDR_PRIx "\n",
+ DEVICE(s)->canonical_path, addr);
+ break;
+
+ default:
+ qemu_log_mask(LOG_GUEST_ERROR,
+ "%s: read from invalid offset 0x%" HWADDR_PRIx "\n",
+ DEVICE(s)->canonical_path, addr);
+ break;
+ }
+
+ trace_npcm7xx_gpio_read(DEVICE(s)->canonical_path, addr, value);
+
+ return value;
+}
+
+static void npcm7xx_gpio_regs_write(void *opaque, hwaddr addr, uint64_t v,
+ unsigned int size)
+{
+ hwaddr reg = addr / sizeof(uint32_t);
+ NPCM7xxGPIOState *s = opaque;
+ uint32_t value = v;
+ uint32_t diff;
+
+ trace_npcm7xx_gpio_write(DEVICE(s)->canonical_path, addr, v);
+
+ if (npcm7xx_gpio_is_locked(s)) {
+ switch (reg) {
+ case NPCM7XX_GPIO_TLOCK1:
+ if (s->regs[NPCM7XX_GPIO_TLOCK2] == NPCM7XX_GPIO_LOCK_MAGIC2 &&
+ value == NPCM7XX_GPIO_LOCK_MAGIC1) {
+ s->regs[NPCM7XX_GPIO_TLOCK1] = 0;
+ s->regs[NPCM7XX_GPIO_TLOCK2] = 0;
+ }
+ break;
+
+ case NPCM7XX_GPIO_TLOCK2:
+ s->regs[reg] = value;
+ break;
+
+ default:
+ qemu_log_mask(LOG_GUEST_ERROR,
+ "%s: write to locked register @ 0x%" HWADDR_PRIx "\n",
+ DEVICE(s)->canonical_path, addr);
+ break;
+ }
+
+ return;
+ }
+
+ diff = s->regs[reg] ^ value;
+
+ switch (reg) {
+ case NPCM7XX_GPIO_TLOCK1:
+ case NPCM7XX_GPIO_TLOCK2:
+ s->regs[NPCM7XX_GPIO_TLOCK1] = 1;
+ s->regs[NPCM7XX_GPIO_TLOCK2] = 0;
+ break;
+
+ case NPCM7XX_GPIO_DIN:
+ qemu_log_mask(LOG_GUEST_ERROR,
+ "%s: write to read-only register @ 0x%" HWADDR_PRIx "\n",
+ DEVICE(s)->canonical_path, addr);
+ break;
+
+ case NPCM7XX_GPIO_POL:
+ case NPCM7XX_GPIO_DOUT:
+ case NPCM7XX_GPIO_OE:
+ case NPCM7XX_GPIO_OTYP:
+ case NPCM7XX_GPIO_PU:
+ case NPCM7XX_GPIO_PD:
+ case NPCM7XX_GPIO_IEM:
+ s->regs[reg] = value;
+ npcm7xx_gpio_update_pins(s, diff);
+ break;
+
+ case NPCM7XX_GPIO_DOS:
+ s->regs[NPCM7XX_GPIO_DOUT] |= value;
+ npcm7xx_gpio_update_pins(s, value);
+ break;
+ case NPCM7XX_GPIO_DOC:
+ s->regs[NPCM7XX_GPIO_DOUT] &= ~value;
+ npcm7xx_gpio_update_pins(s, value);
+ break;
+ case NPCM7XX_GPIO_OES:
+ s->regs[NPCM7XX_GPIO_OE] |= value;
+ npcm7xx_gpio_update_pins(s, value);
+ break;
+ case NPCM7XX_GPIO_OEC:
+ s->regs[NPCM7XX_GPIO_OE] &= ~value;
+ npcm7xx_gpio_update_pins(s, value);
+ break;
+
+ case NPCM7XX_GPIO_EVTYP:
+ case NPCM7XX_GPIO_EVBE:
+ case NPCM7XX_GPIO_EVEN:
+ s->regs[reg] = value;
+ npcm7xx_gpio_update_events(s, 0);
+ break;
+
+ case NPCM7XX_GPIO_EVENS:
+ s->regs[NPCM7XX_GPIO_EVEN] |= value;
+ npcm7xx_gpio_update_events(s, 0);
+ break;
+ case NPCM7XX_GPIO_EVENC:
+ s->regs[NPCM7XX_GPIO_EVEN] &= ~value;
+ npcm7xx_gpio_update_events(s, 0);
+ break;
+
+ case NPCM7XX_GPIO_EVST:
+ s->regs[reg] &= ~value;
+ npcm7xx_gpio_update_events(s, 0);
+ break;
+
+ case NPCM7XX_GPIO_MP:
+ case NPCM7XX_GPIO_DBNC:
+ case NPCM7XX_GPIO_OSRC:
+ case NPCM7XX_GPIO_ODSC:
+ /* Nothing to do; just store the value. */
+ s->regs[reg] = value;
+ break;
+
+ case NPCM7XX_GPIO_OBL0:
+ case NPCM7XX_GPIO_OBL1:
+ case NPCM7XX_GPIO_OBL2:
+ case NPCM7XX_GPIO_OBL3:
+ s->regs[reg] = value;
+ qemu_log_mask(LOG_UNIMP, "%s: Blinking is not implemented\n",
+ __func__);
+ break;
+
+ case NPCM7XX_GPIO_SPLCK:
+ case NPCM7XX_GPIO_MPLCK:
+ qemu_log_mask(LOG_UNIMP, "%s: Per-pin lock is not implemented\n",
+ __func__);
+ break;
+
+ default:
+ qemu_log_mask(LOG_GUEST_ERROR,
+ "%s: write to invalid offset 0x%" HWADDR_PRIx "\n",
+ DEVICE(s)->canonical_path, addr);
+ break;
+ }
+}
+
+static const MemoryRegionOps npcm7xx_gpio_regs_ops = {
+ .read = npcm7xx_gpio_regs_read,
+ .write = npcm7xx_gpio_regs_write,
+ .endianness = DEVICE_NATIVE_ENDIAN,
+ .valid = {
+ .min_access_size = 4,
+ .max_access_size = 4,
+ .unaligned = false,
+ },
+};
+
+static void npcm7xx_gpio_set_input(void *opaque, int line, int level)
+{
+ NPCM7xxGPIOState *s = opaque;
+
+ trace_npcm7xx_gpio_set_input(DEVICE(s)->canonical_path, line, level);
+
+ g_assert(line >= 0 && line < NPCM7XX_GPIO_NR_PINS);
+
+ s->ext_driven = deposit32(s->ext_driven, line, 1, level >= 0);
+ s->ext_level = deposit32(s->ext_level, line, 1, level > 0);
+
+ npcm7xx_gpio_update_pins(s, BIT(line));
+}
+
+static void npcm7xx_gpio_enter_reset(Object *obj, ResetType type)
+{
+ NPCM7xxGPIOState *s = NPCM7XX_GPIO(obj);
+
+ memset(s->regs, 0, sizeof(s->regs));
+
+ s->regs[NPCM7XX_GPIO_PU] = s->reset_pu;
+ s->regs[NPCM7XX_GPIO_PD] = s->reset_pd;
+ s->regs[NPCM7XX_GPIO_OSRC] = s->reset_osrc;
+ s->regs[NPCM7XX_GPIO_ODSC] = s->reset_odsc;
+}
+
+static void npcm7xx_gpio_hold_reset(Object *obj)
+{
+ NPCM7xxGPIOState *s = NPCM7XX_GPIO(obj);
+
+ npcm7xx_gpio_update_pins(s, -1);
+}
+
+static void npcm7xx_gpio_init(Object *obj)
+{
+ NPCM7xxGPIOState *s = NPCM7XX_GPIO(obj);
+ DeviceState *dev = DEVICE(obj);
+
+ memory_region_init_io(&s->mmio, obj, &npcm7xx_gpio_regs_ops, s,
+ "regs", NPCM7XX_GPIO_REGS_SIZE);
+ sysbus_init_mmio(SYS_BUS_DEVICE(obj), &s->mmio);
+ sysbus_init_irq(SYS_BUS_DEVICE(obj), &s->irq);
+
+ qdev_init_gpio_in(dev, npcm7xx_gpio_set_input, NPCM7XX_GPIO_NR_PINS);
+ qdev_init_gpio_out(dev, s->output, NPCM7XX_GPIO_NR_PINS);
+}
+
+static Property npcm7xx_gpio_properties[] = {
+ /* Bit n set => pin n has pullup enabled by default. */
+ DEFINE_PROP_UINT32("reset-pullup", NPCM7xxGPIOState, reset_pu, 0),
+ /* Bit n set => pin n has pulldown enabled by default. */
+ DEFINE_PROP_UINT32("reset-pulldown", NPCM7xxGPIOState, reset_pd, 0),
+ /* Bit n set => pin n has high slew rate by default. */
+ DEFINE_PROP_UINT32("reset-osrc", NPCM7xxGPIOState, reset_osrc, 0),
+ /* Bit n set => pin n has high drive strength by default. */
+ DEFINE_PROP_UINT32("reset-odsc", NPCM7xxGPIOState, reset_odsc, 0),
+ DEFINE_PROP_END_OF_LIST(),
+};
+
+static void npcm7xx_gpio_class_init(ObjectClass *klass, void *data)
+{
+ ResettableClass *reset = RESETTABLE_CLASS(klass);
+ DeviceClass *dc = DEVICE_CLASS(klass);
+
+ QEMU_BUILD_BUG_ON(NPCM7XX_GPIO_REGS_END > NPCM7XX_GPIO_NR_REGS);
+
+ dc->desc = "NPCM7xx GPIO Controller";
+ reset->phases.enter = npcm7xx_gpio_enter_reset;
+ reset->phases.hold = npcm7xx_gpio_hold_reset;
+ device_class_set_props(dc, npcm7xx_gpio_properties);
+}
+
+static const TypeInfo npcm7xx_gpio_types[] = {
+ {
+ .name = TYPE_NPCM7XX_GPIO,
+ .parent = TYPE_SYS_BUS_DEVICE,
+ .instance_size = sizeof(NPCM7xxGPIOState),
+ .class_init = npcm7xx_gpio_class_init,
+ .instance_init = npcm7xx_gpio_init,
+ },
+};
+DEFINE_TYPES(npcm7xx_gpio_types);
diff --git a/tests/qtest/npcm7xx_gpio-test.c b/tests/qtest/npcm7xx_gpio-test.c
new file mode 100644
index 0000000000..1004cef812
--- /dev/null
+++ b/tests/qtest/npcm7xx_gpio-test.c
@@ -0,0 +1,385 @@
+/*
+ * QTest testcase for the Nuvoton NPCM7xx GPIO modules.
+ *
+ * Copyright 2020 Google LLC
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License as published by the
+ * Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
+ * for more details.
+ */
+
+#include "qemu/osdep.h"
+#include "libqtest-single.h"
+
+#define NR_GPIO_DEVICES (8)
+#define GPIO(x) (0xf0010000 + (x) * 0x1000)
+#define GPIO_IRQ(x) (116 + (x))
+
+/* GPIO registers */
+#define GP_N_TLOCK1 0x00
+#define GP_N_DIN 0x04 /* Data IN */
+#define GP_N_POL 0x08 /* Polarity */
+#define GP_N_DOUT 0x0c /* Data OUT */
+#define GP_N_OE 0x10 /* Output Enable */
+#define GP_N_OTYP 0x14
+#define GP_N_MP 0x18
+#define GP_N_PU 0x1c /* Pull-up */
+#define GP_N_PD 0x20 /* Pull-down */
+#define GP_N_DBNC 0x24 /* Debounce */
+#define GP_N_EVTYP 0x28 /* Event Type */
+#define GP_N_EVBE 0x2c /* Event Both Edge */
+#define GP_N_OBL0 0x30
+#define GP_N_OBL1 0x34
+#define GP_N_OBL2 0x38
+#define GP_N_OBL3 0x3c
+#define GP_N_EVEN 0x40 /* Event Enable */
+#define GP_N_EVENS 0x44 /* Event Set (enable) */
+#define GP_N_EVENC 0x48 /* Event Clear (disable) */
+#define GP_N_EVST 0x4c /* Event Status */
+#define GP_N_SPLCK 0x50
+#define GP_N_MPLCK 0x54
+#define GP_N_IEM 0x58 /* Input Enable */
+#define GP_N_OSRC 0x5c
+#define GP_N_ODSC 0x60
+#define GP_N_DOS 0x68 /* Data OUT Set */
+#define GP_N_DOC 0x6c /* Data OUT Clear */
+#define GP_N_OES 0x70 /* Output Enable Set */
+#define GP_N_OEC 0x74 /* Output Enable Clear */
+#define GP_N_TLOCK2 0x7c
+
+static void gpio_unlock(int n)
+{
+ if (readl(GPIO(n) + GP_N_TLOCK1) != 0) {
+ writel(GPIO(n) + GP_N_TLOCK2, 0xc0de1248);
+ writel(GPIO(n) + GP_N_TLOCK1, 0xc0defa73);
+ }
+}
+
+/* Restore the GPIO controller to a sensible default state. */
+static void gpio_reset(int n)
+{
+ gpio_unlock(0);
+
+ writel(GPIO(n) + GP_N_EVEN, 0x00000000);
+ writel(GPIO(n) + GP_N_EVST, 0xffffffff);
+ writel(GPIO(n) + GP_N_POL, 0x00000000);
+ writel(GPIO(n) + GP_N_DOUT, 0x00000000);
+ writel(GPIO(n) + GP_N_OE, 0x00000000);
+ writel(GPIO(n) + GP_N_OTYP, 0x00000000);
+ writel(GPIO(n) + GP_N_PU, 0xffffffff);
+ writel(GPIO(n) + GP_N_PD, 0x00000000);
+ writel(GPIO(n) + GP_N_IEM, 0xffffffff);
+}
+
+static void test_dout_to_din(void)
+{
+ gpio_reset(0);
+
+ /* When output is enabled, DOUT should be reflected on DIN. */
+ writel(GPIO(0) + GP_N_OE, 0xffffffff);
+ /* PU and PD shouldn't have any impact on DIN. */
+ writel(GPIO(0) + GP_N_PU, 0xffff0000);
+ writel(GPIO(0) + GP_N_PD, 0x0000ffff);
+ writel(GPIO(0) + GP_N_DOUT, 0x12345678);
+ g_assert_cmphex(readl(GPIO(0) + GP_N_DOUT), ==, 0x12345678);
+ g_assert_cmphex(readl(GPIO(0) + GP_N_DIN), ==, 0x12345678);
+}
+
+static void test_pullup_pulldown(void)
+{
+ gpio_reset(0);
+
+ /*
+ * When output is disabled, and PD is the inverse of PU, PU should be
+ * reflected on DIN. If PD is not the inverse of PU, the state of DIN is
+ * undefined, so we don't test that.
+ */
+ writel(GPIO(0) + GP_N_OE, 0x00000000);
+ /* DOUT shouldn't have any impact on DIN. */
+ writel(GPIO(0) + GP_N_DOUT, 0xffff0000);
+ writel(GPIO(0) + GP_N_PU, 0x23456789);
+ writel(GPIO(0) + GP_N_PD, ~0x23456789U);
+ g_assert_cmphex(readl(GPIO(0) + GP_N_PU), ==, 0x23456789);
+ g_assert_cmphex(readl(GPIO(0) + GP_N_PD), ==, ~0x23456789U);
+ g_assert_cmphex(readl(GPIO(0) + GP_N_DIN), ==, 0x23456789);
+}
+
+static void test_output_enable(void)
+{
+ gpio_reset(0);
+
+ /*
+ * With all pins weakly pulled down, and DOUT all-ones, OE should be
+ * reflected on DIN.
+ */
+ writel(GPIO(0) + GP_N_DOUT, 0xffffffff);
+ writel(GPIO(0) + GP_N_PU, 0x00000000);
+ writel(GPIO(0) + GP_N_PD, 0xffffffff);
+ writel(GPIO(0) + GP_N_OE, 0x3456789a);
+ g_assert_cmphex(readl(GPIO(0) + GP_N_OE), ==, 0x3456789a);
+ g_assert_cmphex(readl(GPIO(0) + GP_N_DIN), ==, 0x3456789a);
+
+ writel(GPIO(0) + GP_N_OEC, 0x00030002);
+ g_assert_cmphex(readl(GPIO(0) + GP_N_OE), ==, 0x34547898);
+ g_assert_cmphex(readl(GPIO(0) + GP_N_DIN), ==, 0x34547898);
+
+ writel(GPIO(0) + GP_N_OES, 0x0000f001);
+ g_assert_cmphex(readl(GPIO(0) + GP_N_OE), ==, 0x3454f899);
+ g_assert_cmphex(readl(GPIO(0) + GP_N_DIN), ==, 0x3454f899);
+}
+
+static void test_open_drain(void)
+{
+ gpio_reset(0);
+
+ /*
+ * Upper half of DOUT drives a 1 only if the corresponding bit in OTYP is
+ * not set. If OTYP is set, DIN is determined by PU/PD. Lower half of
+ * DOUT always drives a 0 regardless of OTYP; PU/PD have no effect. When
+ * OE is 0, output is determined by PU/PD; OTYP has no effect.
+ */
+ writel(GPIO(0) + GP_N_OTYP, 0x456789ab);
+ writel(GPIO(0) + GP_N_OE, 0xf0f0f0f0);
+ writel(GPIO(0) + GP_N_DOUT, 0xffff0000);
+ writel(GPIO(0) + GP_N_PU, 0xff00ff00);
+ writel(GPIO(0) + GP_N_PD, 0x00ff00ff);
+ g_assert_cmphex(readl(GPIO(0) + GP_N_OTYP), ==, 0x456789ab);
+ g_assert_cmphex(readl(GPIO(0) + GP_N_DIN), ==, 0xff900f00);
+}
+
+static void test_polarity(void)
+{
+ gpio_reset(0);
+
+ /*
+ * In push-pull mode, DIN should reflect DOUT because the signal is
+ * inverted in both directions.
+ */
+ writel(GPIO(0) + GP_N_OTYP, 0x00000000);
+ writel(GPIO(0) + GP_N_OE, 0xffffffff);
+ writel(GPIO(0) + GP_N_DOUT, 0x56789abc);
+ writel(GPIO(0) + GP_N_POL, 0x6789abcd);
+ g_assert_cmphex(readl(GPIO(0) + GP_N_POL), ==, 0x6789abcd);
+ g_assert_cmphex(readl(GPIO(0) + GP_N_DIN), ==, 0x56789abc);
+
+ /*
+ * When turning off the drivers, DIN should reflect the inverse of the
+ * pulled-up lines.
+ */
+ writel(GPIO(0) + GP_N_OE, 0x00000000);
+ writel(GPIO(0) + GP_N_POL, 0xffffffff);
+ writel(GPIO(0) + GP_N_PU, 0x789abcde);
+ writel(GPIO(0) + GP_N_PD, ~0x789abcdeU);
+ g_assert_cmphex(readl(GPIO(0) + GP_N_DIN), ==, ~0x789abcdeU);
+
+ /*
+ * In open-drain mode, DOUT=1 will appear to drive the pin high (since DIN
+ * is inverted), while DOUT=0 will leave the pin floating.
+ */
+ writel(GPIO(0) + GP_N_OTYP, 0xffffffff);
+ writel(GPIO(0) + GP_N_OE, 0xffffffff);
+ writel(GPIO(0) + GP_N_PU, 0xffff0000);
+ writel(GPIO(0) + GP_N_PD, 0x0000ffff);
+ writel(GPIO(0) + GP_N_DOUT, 0xff00ff00);
+ g_assert_cmphex(readl(GPIO(0) + GP_N_DIN), ==, 0xff00ffff);
+}
+
+static void test_input_mask(void)
+{
+ gpio_reset(0);
+
+ /* IEM=0 forces the input to zero before polarity inversion. */
+ writel(GPIO(0) + GP_N_OE, 0xffffffff);
+ writel(GPIO(0) + GP_N_DOUT, 0xff00ff00);
+ writel(GPIO(0) + GP_N_POL, 0xffff0000);
+ writel(GPIO(0) + GP_N_IEM, 0x87654321);
+ g_assert_cmphex(readl(GPIO(0) + GP_N_DIN), ==, 0xff9a4300);
+}
+
+static void test_temp_lock(void)
+{
+ gpio_reset(0);
+
+ writel(GPIO(0) + GP_N_DOUT, 0x98765432);
+
+ /* Make sure we're unlocked initially. */
+ g_assert_cmphex(readl(GPIO(0) + GP_N_TLOCK1), ==, 0);
+ /* Writing any value to TLOCK1 will lock. */
+ writel(GPIO(0) + GP_N_TLOCK1, 0);
+ g_assert_cmphex(readl(GPIO(0) + GP_N_TLOCK1), ==, 1);
+ writel(GPIO(0) + GP_N_DOUT, 0xa9876543);
+ g_assert_cmphex(readl(GPIO(0) + GP_N_DOUT), ==, 0x98765432);
+ /* Now, try to unlock. */
+ gpio_unlock(0);
+ g_assert_cmphex(readl(GPIO(0) + GP_N_TLOCK1), ==, 0);
+ writel(GPIO(0) + GP_N_DOUT, 0xa9876543);
+ g_assert_cmphex(readl(GPIO(0) + GP_N_DOUT), ==, 0xa9876543);
+
+ /* Try it again, but write TLOCK2 to lock. */
+ writel(GPIO(0) + GP_N_TLOCK2, 0);
+ g_assert_cmphex(readl(GPIO(0) + GP_N_TLOCK1), ==, 1);
+ writel(GPIO(0) + GP_N_DOUT, 0x98765432);
+ g_assert_cmphex(readl(GPIO(0) + GP_N_DOUT), ==, 0xa9876543);
+ /* Now, try to unlock. */
+ gpio_unlock(0);
+ g_assert_cmphex(readl(GPIO(0) + GP_N_TLOCK1), ==, 0);
+ writel(GPIO(0) + GP_N_DOUT, 0x98765432);
+ g_assert_cmphex(readl(GPIO(0) + GP_N_DOUT), ==, 0x98765432);
+}
+
+static void test_events_level(void)
+{
+ gpio_reset(0);
+
+ writel(GPIO(0) + GP_N_EVTYP, 0x00000000);
+ writel(GPIO(0) + GP_N_DOUT, 0xba987654);
+ writel(GPIO(0) + GP_N_OE, 0xffffffff);
+ writel(GPIO(0) + GP_N_EVST, 0xffffffff);
+
+ g_assert_cmphex(readl(GPIO(0) + GP_N_EVST), ==, 0xba987654);
+ g_assert_false(qtest_get_irq(global_qtest, GPIO_IRQ(0)));
+ writel(GPIO(0) + GP_N_DOUT, 0x00000000);
+ g_assert_cmphex(readl(GPIO(0) + GP_N_EVST), ==, 0xba987654);
+ g_assert_false(qtest_get_irq(global_qtest, GPIO_IRQ(0)));
+ writel(GPIO(0) + GP_N_EVST, 0x00007654);
+ g_assert_cmphex(readl(GPIO(0) + GP_N_EVST), ==, 0xba980000);
+ g_assert_false(qtest_get_irq(global_qtest, GPIO_IRQ(0)));
+ writel(GPIO(0) + GP_N_EVST, 0xba980000);
+ g_assert_cmphex(readl(GPIO(0) + GP_N_EVST), ==, 0x00000000);
+ g_assert_false(qtest_get_irq(global_qtest, GPIO_IRQ(0)));
+}
+
+static void test_events_rising_edge(void)
+{
+ gpio_reset(0);
+
+ writel(GPIO(0) + GP_N_EVTYP, 0xffffffff);
+ writel(GPIO(0) + GP_N_EVBE, 0x00000000);
+ writel(GPIO(0) + GP_N_DOUT, 0xffff0000);
+ writel(GPIO(0) + GP_N_OE, 0xffffffff);
+ writel(GPIO(0) + GP_N_EVST, 0xffffffff);
+
+ g_assert_cmphex(readl(GPIO(0) + GP_N_EVST), ==, 0x00000000);
+ g_assert_false(qtest_get_irq(global_qtest, GPIO_IRQ(0)));
+ writel(GPIO(0) + GP_N_DOUT, 0xff00ff00);
+ g_assert_cmphex(readl(GPIO(0) + GP_N_EVST), ==, 0x0000ff00);
+ g_assert_false(qtest_get_irq(global_qtest, GPIO_IRQ(0)));
+ writel(GPIO(0) + GP_N_DOUT, 0x00ff0000);
+ g_assert_cmphex(readl(GPIO(0) + GP_N_EVST), ==, 0x00ffff00);
+ g_assert_false(qtest_get_irq(global_qtest, GPIO_IRQ(0)));
+ writel(GPIO(0) + GP_N_EVST, 0x0000f000);
+ g_assert_cmphex(readl(GPIO(0) + GP_N_EVST), ==, 0x00ff0f00);
+ g_assert_false(qtest_get_irq(global_qtest, GPIO_IRQ(0)));
+ writel(GPIO(0) + GP_N_EVST, 0x00ff0f00);
+ g_assert_cmphex(readl(GPIO(0) + GP_N_EVST), ==, 0x00000000);
+ g_assert_false(qtest_get_irq(global_qtest, GPIO_IRQ(0)));
+}
+
+static void test_events_both_edges(void)
+{
+ gpio_reset(0);
+
+ writel(GPIO(0) + GP_N_EVTYP, 0xffffffff);
+ writel(GPIO(0) + GP_N_EVBE, 0xffffffff);
+ writel(GPIO(0) + GP_N_DOUT, 0xffff0000);
+ writel(GPIO(0) + GP_N_OE, 0xffffffff);
+ writel(GPIO(0) + GP_N_EVST, 0xffffffff);
+
+ g_assert_cmphex(readl(GPIO(0) + GP_N_EVST), ==, 0x00000000);
+ g_assert_false(qtest_get_irq(global_qtest, GPIO_IRQ(0)));
+ writel(GPIO(0) + GP_N_DOUT, 0xff00ff00);
+ g_assert_cmphex(readl(GPIO(0) + GP_N_EVST), ==, 0x00ffff00);
+ g_assert_false(qtest_get_irq(global_qtest, GPIO_IRQ(0)));
+ writel(GPIO(0) + GP_N_DOUT, 0xef00ff08);
+ g_assert_cmphex(readl(GPIO(0) + GP_N_EVST), ==, 0x10ffff08);
+ g_assert_false(qtest_get_irq(global_qtest, GPIO_IRQ(0)));
+ writel(GPIO(0) + GP_N_EVST, 0x0000f000);
+ g_assert_cmphex(readl(GPIO(0) + GP_N_EVST), ==, 0x10ff0f08);
+ g_assert_false(qtest_get_irq(global_qtest, GPIO_IRQ(0)));
+ writel(GPIO(0) + GP_N_EVST, 0x10ff0f08);
+ g_assert_cmphex(readl(GPIO(0) + GP_N_EVST), ==, 0x00000000);
+ g_assert_false(qtest_get_irq(global_qtest, GPIO_IRQ(0)));
+}
+
+static void test_gpion_irq(gconstpointer test_data)
+{
+ intptr_t n = (intptr_t)test_data;
+
+ gpio_reset(n);
+
+ writel(GPIO(n) + GP_N_EVTYP, 0x00000000);
+ writel(GPIO(n) + GP_N_DOUT, 0x00000000);
+ writel(GPIO(n) + GP_N_OE, 0xffffffff);
+ writel(GPIO(n) + GP_N_EVST, 0xffffffff);
+ writel(GPIO(n) + GP_N_EVEN, 0x00000000);
+
+ /* Trigger an event; interrupts are masked. */
+ g_assert_cmphex(readl(GPIO(n) + GP_N_EVST), ==, 0x00000000);
+ g_assert_false(qtest_get_irq(global_qtest, GPIO_IRQ(n)));
+ writel(GPIO(n) + GP_N_DOS, 0x00008000);
+ g_assert_cmphex(readl(GPIO(n) + GP_N_EVST), ==, 0x00008000);
+ g_assert_false(qtest_get_irq(global_qtest, GPIO_IRQ(n)));
+
+ /* Unmask all event interrupts; verify that the interrupt fired. */
+ writel(GPIO(n) + GP_N_EVEN, 0xffffffff);
+ g_assert_true(qtest_get_irq(global_qtest, GPIO_IRQ(n)));
+
+ /* Clear the current bit, set a new bit, irq stays asserted. */
+ writel(GPIO(n) + GP_N_DOC, 0x00008000);
+ g_assert_true(qtest_get_irq(global_qtest, GPIO_IRQ(n)));
+ writel(GPIO(n) + GP_N_DOS, 0x00000200);
+ g_assert_true(qtest_get_irq(global_qtest, GPIO_IRQ(n)));
+ writel(GPIO(n) + GP_N_EVST, 0x00008000);
+ g_assert_true(qtest_get_irq(global_qtest, GPIO_IRQ(n)));
+
+ /* Mask/unmask the event that's currently active. */
+ writel(GPIO(n) + GP_N_EVENC, 0x00000200);
+ g_assert_false(qtest_get_irq(global_qtest, GPIO_IRQ(n)));
+ writel(GPIO(n) + GP_N_EVENS, 0x00000200);
+ g_assert_true(qtest_get_irq(global_qtest, GPIO_IRQ(n)));
+
+ /* Clear the input and the status bit, irq is deasserted. */
+ writel(GPIO(n) + GP_N_DOC, 0x00000200);
+ g_assert_true(qtest_get_irq(global_qtest, GPIO_IRQ(n)));
+ writel(GPIO(n) + GP_N_EVST, 0x00000200);
+ g_assert_false(qtest_get_irq(global_qtest, GPIO_IRQ(n)));
+}
+
+int main(int argc, char **argv)
+{
+ int ret;
+ int i;
+
+ g_test_init(&argc, &argv, NULL);
+ g_test_set_nonfatal_assertions();
+
+ qtest_add_func("/npcm7xx_gpio/dout_to_din", test_dout_to_din);
+ qtest_add_func("/npcm7xx_gpio/pullup_pulldown", test_pullup_pulldown);
+ qtest_add_func("/npcm7xx_gpio/output_enable", test_output_enable);
+ qtest_add_func("/npcm7xx_gpio/open_drain", test_open_drain);
+ qtest_add_func("/npcm7xx_gpio/polarity", test_polarity);
+ qtest_add_func("/npcm7xx_gpio/input_mask", test_input_mask);
+ qtest_add_func("/npcm7xx_gpio/temp_lock", test_temp_lock);
+ qtest_add_func("/npcm7xx_gpio/events/level", test_events_level);
+ qtest_add_func("/npcm7xx_gpio/events/rising_edge", test_events_rising_edge);
+ qtest_add_func("/npcm7xx_gpio/events/both_edges", test_events_both_edges);
+
+ for (i = 0; i < NR_GPIO_DEVICES; i++) {
+ g_autofree char *test_name =
+ g_strdup_printf("/npcm7xx_gpio/gpio[%d]/irq", i);
+ qtest_add_data_func(test_name, (void *)(intptr_t)i, test_gpion_irq);
+ }
+
+ qtest_start("-machine npcm750-evb");
+ qtest_irq_intercept_in(global_qtest, "/machine/soc/a9mpcore/gic");
+ ret = g_test_run();
+ qtest_end();
+
+ return ret;
+}
diff --git a/hw/gpio/meson.build b/hw/gpio/meson.build
index 86cae9a0f3..5c0a7d7b95 100644
--- a/hw/gpio/meson.build
+++ b/hw/gpio/meson.build
@@ -6,6 +6,7 @@ softmmu_ss.add(when: 'CONFIG_PUV3', if_true: files('puv3_gpio.c'))
softmmu_ss.add(when: 'CONFIG_ZAURUS', if_true: files('zaurus.c'))
softmmu_ss.add(when: 'CONFIG_IMX', if_true: files('imx_gpio.c'))
+softmmu_ss.add(when: 'CONFIG_NPCM7XX', if_true: files('npcm7xx_gpio.c'))
softmmu_ss.add(when: 'CONFIG_NRF51_SOC', if_true: files('nrf51_gpio.c'))
softmmu_ss.add(when: 'CONFIG_OMAP', if_true: files('omap_gpio.c'))
softmmu_ss.add(when: 'CONFIG_RASPI', if_true: files('bcm2835_gpio.c'))
diff --git a/hw/gpio/trace-events b/hw/gpio/trace-events
index 6e3f048745..46ab9323bd 100644
--- a/hw/gpio/trace-events
+++ b/hw/gpio/trace-events
@@ -1,5 +1,12 @@
# See docs/devel/tracing.txt for syntax documentation.
+# npcm7xx_gpio.c
+npcm7xx_gpio_read(const char *id, uint64_t offset, uint64_t value) " %s offset: 0x%04" PRIx64 " value 0x%08" PRIx64
+npcm7xx_gpio_write(const char *id, uint64_t offset, uint64_t value) "%s offset: 0x%04" PRIx64 " value 0x%08" PRIx64
+npcm7xx_gpio_set_input(const char *id, int32_t line, int32_t level) "%s line: %" PRIi32 " level: %" PRIi32
+npcm7xx_gpio_set_output(const char *id, int32_t line, int32_t level) "%s line: %" PRIi32 " level: %" PRIi32
+npcm7xx_gpio_update_events(const char *id, uint32_t evst, uint32_t even) "%s evst: 0x%08" PRIx32 " even: 0x%08" PRIx32
+
# nrf51_gpio.c
nrf51_gpio_read(uint64_t offset, uint64_t r) "offset 0x%" PRIx64 " value 0x%" PRIx64
nrf51_gpio_write(uint64_t offset, uint64_t value) "offset 0x%" PRIx64 " value 0x%" PRIx64
diff --git a/tests/qtest/meson.build b/tests/qtest/meson.build
index 796553e16e..a3b0e4d1ee 100644
--- a/tests/qtest/meson.build
+++ b/tests/qtest/meson.build
@@ -137,6 +137,7 @@ qtests_arm = \
['arm-cpu-features',
'microbit-test',
'm25p80-test',
+ 'npcm7xx_gpio-test',
'npcm7xx_timer-test',
'npcm7xx_watchdog_timer-test',
'npcm7xx_rng-test',
--
2.28.0.1011.ga647a8990f-goog
^ permalink raw reply related [flat|nested] 14+ messages in thread* Re: [PATCH 6/6] hw/gpio: Add GPIO model for Nuvoton NPCM7xx
2020-10-08 23:21 ` [PATCH 6/6] hw/gpio: Add GPIO model for Nuvoton NPCM7xx Havard Skinnemoen via
@ 2020-10-20 13:07 ` Peter Maydell
0 siblings, 0 replies; 14+ messages in thread
From: Peter Maydell @ 2020-10-20 13:07 UTC (permalink / raw)
To: Havard Skinnemoen
Cc: Philippe Mathieu-Daudé,
QEMU Developers, CS20 KFTing, qemu-arm, Cédric Le Goater,
IS20 Avi Fishman
On Fri, 9 Oct 2020 at 00:22, Havard Skinnemoen <hskinnemoen@google.com> wrote:
>
> The NPCM7xx chips have multiple GPIO controllers that are mostly
> identical except for some minor differences like the reset values of
> some registers. Each controller controls up to 32 pins.
>
> Each individual pin is modeled as a pair of unnamed GPIOs -- one for
> emitting the actual pin state, and one for driving the pin externally.
> Like the nRF51 GPIO controller, a gpio level may be negative, which
> means the pin is not driven, or floating.
>
> Reviewed-by: Tyrone Ting <kfting@nuvoton.com>
> Signed-off-by: Havard Skinnemoen <hskinnemoen@google.com>
> +static void npcm7xx_gpio_class_init(ObjectClass *klass, void *data)
> +{
> + ResettableClass *reset = RESETTABLE_CLASS(klass);
> + DeviceClass *dc = DEVICE_CLASS(klass);
> +
> + QEMU_BUILD_BUG_ON(NPCM7XX_GPIO_REGS_END > NPCM7XX_GPIO_NR_REGS);
> +
> + dc->desc = "NPCM7xx GPIO Controller";
> + reset->phases.enter = npcm7xx_gpio_enter_reset;
> + reset->phases.hold = npcm7xx_gpio_hold_reset;
> + device_class_set_props(dc, npcm7xx_gpio_properties);
> +}
Missing vmstate struct. Otherwise device looks good.
thanks
-- PMM
^ permalink raw reply [flat|nested] 14+ messages in thread
* Re: [PATCH 0/6] Additional NPCM7xx features, devices and tests
2020-10-08 23:21 [PATCH 0/6] Additional NPCM7xx features, devices and tests Havard Skinnemoen via
` (5 preceding siblings ...)
2020-10-08 23:21 ` [PATCH 6/6] hw/gpio: Add GPIO model for Nuvoton NPCM7xx Havard Skinnemoen via
@ 2020-10-20 13:12 ` Peter Maydell
6 siblings, 0 replies; 14+ messages in thread
From: Peter Maydell @ 2020-10-20 13:12 UTC (permalink / raw)
To: Havard Skinnemoen
Cc: Philippe Mathieu-Daudé,
QEMU Developers, CS20 KFTing, qemu-arm, Cédric Le Goater,
IS20 Avi Fishman
On Fri, 9 Oct 2020 at 00:22, Havard Skinnemoen <hskinnemoen@google.com> wrote:
>
> This is an update to the initial NPCM7xx patch series adding
>
> - A timer test that found several issues that were fixed in the final version
> of the series (see
> https://www.mail-archive.com/qemu-devel@nongnu.org/msg739516.html).
> - Watchdog timer support. This makes the reboot command work.
> - Random Number Generator device.
> - USB Host Controllers.
> - GPIO Controllers.
>
> The watchdog was implemented by my new teammate Hao Wu. Expect to see more
> patches from him in the near future.
>
> This series has also been pushed to the npcm7xx-5.2-update branch of my github
> repository at
>
> https://github.com/hskinnemoen/qemu
>
> Again, thanks a lot for reviewing!
I'm going to take patch 1 (the timer test case) into my target-arm.next
queue; I've sent some review comments on the other parts of the series.
thanks
-- PMM
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