[Qemu-devel] [PATCH v1 1/2] target_arm: Remove memory region init from armv7m_init

[Qemu-devel] [PATCH v1 1/2] target_arm: Remove memory region init from armv7m_init

[Alistair Francis]

This patch moves the memory region init code from the
armv7m_init function to the stellaris_init function

Signed-off-by: Alistair Francis <alistair23@gmail.com>
Reviewed-by: Peter Crosthwaite <peter.crosthwaite@xilinx.com>
---
This has been split from the Netduino 2 machine patch
series.

 hw/arm/armv7m.c      | 33 +++------------------------------
 hw/arm/stellaris.c   | 24 ++++++++++++++++++++----
 include/hw/arm/arm.h |  3 +--
 3 files changed, 24 insertions(+), 36 deletions(-)

diff --git a/hw/arm/armv7m.c b/hw/arm/armv7m.c
index ef24ca4..50281f7 100644
--- a/hw/arm/armv7m.c
+++ b/hw/arm/armv7m.c
@@ -163,11 +163,10 @@ static void armv7m_reset(void *opaque)
 }
 
 /* Init CPU and memory for a v7-M based board.
-   flash_size and sram_size are in kb.
+   mem_size is in bytes.
    Returns the NVIC array.  */
 
-qemu_irq *armv7m_init(MemoryRegion *system_memory,
-                      int flash_size, int sram_size,
+qemu_irq *armv7m_init(MemoryRegion *system_memory, int mem_size,
                       const char *kernel_filename, const char *cpu_model)
 {
     ARMCPU *cpu;
@@ -180,13 +179,8 @@ qemu_irq *armv7m_init(MemoryRegion *system_memory,
     uint64_t lowaddr;
     int i;
     int big_endian;
-    MemoryRegion *sram = g_new(MemoryRegion, 1);
-    MemoryRegion *flash = g_new(MemoryRegion, 1);
     MemoryRegion *hack = g_new(MemoryRegion, 1);
 
-    flash_size *= 1024;
-    sram_size *= 1024;
-
     if (cpu_model == NULL) {
 	cpu_model = "cortex-m3";
     }
@@ -197,27 +191,6 @@ qemu_irq *armv7m_init(MemoryRegion *system_memory,
     }
     env = &cpu->env;
 
-#if 0
-    /* > 32Mb SRAM gets complicated because it overlaps the bitband area.
-       We don't have proper commandline options, so allocate half of memory
-       as SRAM, up to a maximum of 32Mb, and the rest as code.  */
-    if (ram_size > (512 + 32) * 1024 * 1024)
-        ram_size = (512 + 32) * 1024 * 1024;
-    sram_size = (ram_size / 2) & TARGET_PAGE_MASK;
-    if (sram_size > 32 * 1024 * 1024)
-        sram_size = 32 * 1024 * 1024;
-    code_size = ram_size - sram_size;
-#endif
-
-    /* Flash programming is done via the SCU, so pretend it is ROM.  */
-    memory_region_init_ram(flash, NULL, "armv7m.flash", flash_size,
-                           &error_abort);
-    vmstate_register_ram_global(flash);
-    memory_region_set_readonly(flash, true);
-    memory_region_add_subregion(system_memory, 0, flash);
-    memory_region_init_ram(sram, NULL, "armv7m.sram", sram_size, &error_abort);
-    vmstate_register_ram_global(sram);
-    memory_region_add_subregion(system_memory, 0x20000000, sram);
     armv7m_bitband_init();
 
     nvic = qdev_create(NULL, "armv7m_nvic");
@@ -244,7 +217,7 @@ qemu_irq *armv7m_init(MemoryRegion *system_memory,
         image_size = load_elf(kernel_filename, NULL, NULL, &entry, &lowaddr,
                               NULL, big_endian, ELF_MACHINE, 1);
         if (image_size < 0) {
-            image_size = load_image_targphys(kernel_filename, 0, flash_size);
+            image_size = load_image_targphys(kernel_filename, 0, mem_size);
             lowaddr = 0;
         }
         if (image_size < 0) {
diff --git a/hw/arm/stellaris.c b/hw/arm/stellaris.c
index 64bd4b4..d0c61c5 100644
--- a/hw/arm/stellaris.c
+++ b/hw/arm/stellaris.c
@@ -1220,10 +1220,26 @@ static void stellaris_init(const char *kernel_filename, const char *cpu_model,
     int i;
     int j;
 
-    flash_size = ((board->dc0 & 0xffff) + 1) << 1;
-    sram_size = (board->dc0 >> 18) + 1;
-    pic = armv7m_init(get_system_memory(),
-                      flash_size, sram_size, kernel_filename, cpu_model);
+    MemoryRegion *sram = g_new(MemoryRegion, 1);
+    MemoryRegion *flash = g_new(MemoryRegion, 1);
+    MemoryRegion *system_memory = get_system_memory();
+
+    flash_size = (((board->dc0 & 0xffff) + 1) << 1) * 1024;
+    sram_size = ((board->dc0 >> 18) + 1) * 1024;
+
+    /* Flash programming is done via the SCU, so pretend it is ROM.  */
+    memory_region_init_ram(flash, NULL, "stellaris.flash", flash_size,
+                           &error_abort);
+    vmstate_register_ram_global(flash);
+    memory_region_set_readonly(flash, true);
+    memory_region_add_subregion(system_memory, 0, flash);
+
+    memory_region_init_ram(sram, NULL, "stellaris.sram", sram_size,
+                           &error_abort);
+    vmstate_register_ram_global(sram);
+    memory_region_add_subregion(system_memory, 0x20000000, sram);
+
+    pic = armv7m_init(system_memory, flash_size, kernel_filename, cpu_model);
 
     if (board->dc1 & (1 << 16)) {
         dev = sysbus_create_varargs(TYPE_STELLARIS_ADC, 0x40038000,
diff --git a/include/hw/arm/arm.h b/include/hw/arm/arm.h
index c4bf56d..f8b329b 100644
--- a/include/hw/arm/arm.h
+++ b/include/hw/arm/arm.h
@@ -15,8 +15,7 @@
 #include "hw/irq.h"
 
 /* armv7m.c */
-qemu_irq *armv7m_init(MemoryRegion *system_memory,
-                      int flash_size, int sram_size,
+qemu_irq *armv7m_init(MemoryRegion *system_memory, int mem_size,
                       const char *kernel_filename, const char *cpu_model);
 
 /* arm_boot.c */
-- 
2.1.0

[Qemu-devel] [PATCH v1 2/2] target_arm: Parameterise the irq lines for armv7m_init

[Alistair Francis]

This patch allows the board to specifiy the number of NVIC interrupt
lines when using armv7m_init.

Signed-off-by: Alistair Francis <alistair23@gmail.com>
Reviewed-by: Peter Crosthwaite <peter.crosthwaite@xilinx.com>
---
This has been split from the Netduino 2 machine patch
series.

 hw/arm/armv7m.c      | 7 ++++---
 hw/arm/stellaris.c   | 5 ++++-
 include/hw/arm/arm.h | 2 +-
 3 files changed, 9 insertions(+), 5 deletions(-)

diff --git a/hw/arm/armv7m.c b/hw/arm/armv7m.c
index 50281f7..7169027 100644
--- a/hw/arm/armv7m.c
+++ b/hw/arm/armv7m.c
@@ -166,14 +166,14 @@ static void armv7m_reset(void *opaque)
    mem_size is in bytes.
    Returns the NVIC array.  */
 
-qemu_irq *armv7m_init(MemoryRegion *system_memory, int mem_size,
+qemu_irq *armv7m_init(MemoryRegion *system_memory, int mem_size, int num_irq,
                       const char *kernel_filename, const char *cpu_model)
 {
     ARMCPU *cpu;
     CPUARMState *env;
     DeviceState *nvic;
     /* FIXME: make this local state.  */
-    static qemu_irq pic[64];
+    qemu_irq *pic = g_new(qemu_irq, num_irq);
     int image_size;
     uint64_t entry;
     uint64_t lowaddr;
@@ -194,11 +194,12 @@ qemu_irq *armv7m_init(MemoryRegion *system_memory, int mem_size,
     armv7m_bitband_init();
 
     nvic = qdev_create(NULL, "armv7m_nvic");
+    qdev_prop_set_uint32(nvic, "num-irq", num_irq);
     env->nvic = nvic;
     qdev_init_nofail(nvic);
     sysbus_connect_irq(SYS_BUS_DEVICE(nvic), 0,
                        qdev_get_gpio_in(DEVICE(cpu), ARM_CPU_IRQ));
-    for (i = 0; i < 64; i++) {
+    for (i = 0; i < num_irq; i++) {
         pic[i] = qdev_get_gpio_in(nvic, i);
     }
 
diff --git a/hw/arm/stellaris.c b/hw/arm/stellaris.c
index d0c61c5..6fad10f 100644
--- a/hw/arm/stellaris.c
+++ b/hw/arm/stellaris.c
@@ -29,6 +29,8 @@
 #define BP_OLED_SSI  0x02
 #define BP_GAMEPAD   0x04
 
+#define NUM_IRQ_LINES 64
+
 typedef const struct {
     const char *name;
     uint32_t did0;
@@ -1239,7 +1241,8 @@ static void stellaris_init(const char *kernel_filename, const char *cpu_model,
     vmstate_register_ram_global(sram);
     memory_region_add_subregion(system_memory, 0x20000000, sram);
 
-    pic = armv7m_init(system_memory, flash_size, kernel_filename, cpu_model);
+    pic = armv7m_init(system_memory, flash_size, NUM_IRQ_LINES,
+                      kernel_filename, cpu_model);
 
     if (board->dc1 & (1 << 16)) {
         dev = sysbus_create_varargs(TYPE_STELLARIS_ADC, 0x40038000,
diff --git a/include/hw/arm/arm.h b/include/hw/arm/arm.h
index f8b329b..5c940eb 100644
--- a/include/hw/arm/arm.h
+++ b/include/hw/arm/arm.h
@@ -15,7 +15,7 @@
 #include "hw/irq.h"
 
 /* armv7m.c */
-qemu_irq *armv7m_init(MemoryRegion *system_memory, int mem_size,
+qemu_irq *armv7m_init(MemoryRegion *system_memory, int mem_size, int num_irq,
                       const char *kernel_filename, const char *cpu_model);
 
 /* arm_boot.c */
-- 
2.1.0

Re: [Qemu-devel] [PATCH v1 1/2] target_arm: Remove memory region init from armv7m_init

[Peter Maydell]

On 24 January 2015 at 08:02, Alistair Francis <alistair23@gmail.com> wrote:
> This patch moves the memory region init code from the
> armv7m_init function to the stellaris_init function
>
> Signed-off-by: Alistair Francis <alistair23@gmail.com>
> Reviewed-by: Peter Crosthwaite <peter.crosthwaite@xilinx.com>
> ---
> This has been split from the Netduino 2 machine patch
> series.

Reviewed-by: Peter Maydell <peter.maydell@linaro.org>
and applied to target-arm.next.

PS: if you're sending more than one patch can you make sure you
include a cover letter email as well, please? It's a bit awkward
to track pending-review patches otherwise.

thanks
-- PMM

Re: [Qemu-devel] [PATCH v1 2/2] target_arm: Parameterise the irq lines for armv7m_init

[Peter Maydell]

On 24 January 2015 at 08:02, Alistair Francis <alistair23@gmail.com> wrote:
> This patch allows the board to specifiy the number of NVIC interrupt
> lines when using armv7m_init.
>
> Signed-off-by: Alistair Francis <alistair23@gmail.com>
> Reviewed-by: Peter Crosthwaite <peter.crosthwaite@xilinx.com>
> ---
>      /* FIXME: make this local state.  */
> -    static qemu_irq pic[64];
> +    qemu_irq *pic = g_new(qemu_irq, num_irq);

The FIXME is now stale and can be removed.

I've made that minor change and applied this to target-arm.next.

thanks
-- PMM

Re: [Qemu-devel] [PATCH v1 1/2] target_arm: Remove memory region init from armv7m_init

[Alistair Francis]

On Wed, Jan 28, 2015 at 4:37 AM, Peter Maydell <peter.maydell@linaro.org> wrote:
> On 24 January 2015 at 08:02, Alistair Francis <alistair23@gmail.com> wrote:
>> This patch moves the memory region init code from the
>> armv7m_init function to the stellaris_init function
>>
>> Signed-off-by: Alistair Francis <alistair23@gmail.com>
>> Reviewed-by: Peter Crosthwaite <peter.crosthwaite@xilinx.com>
>> ---
>> This has been split from the Netduino 2 machine patch
>> series.
>
> Reviewed-by: Peter Maydell <peter.maydell@linaro.org>
> and applied to target-arm.next.

Thanks :)

>
> PS: if you're sending more than one patch can you make sure you
> include a cover letter email as well, please? It's a bit awkward
> to track pending-review patches otherwise.

Sorry, I will include one next time.

Thanks,

Alistair

>
> thanks
> -- PMM