[Qemu-devel] [PATCH v6 6/6] i.MX: Add sabrelite i.MX6 emulation. - Jean-Christophe Dubois

From: Jean-Christophe Dubois <jcd@tribudubois.net>
To: qemu-devel@nongnu.org, peter.maydell@linaro.org,
	crosthwaite.peter@gmail.com
Cc: Jean-Christophe Dubois <jcd@tribudubois.net>
Subject: [Qemu-devel] [PATCH v6 6/6] i.MX: Add sabrelite i.MX6 emulation.
Date: Sat,  2 Apr 2016 15:15:07 +0200	[thread overview]
Message-ID: <b23e0bd7afe254d80b1ef38d9fc0697f42005363.1459590105.git.jcd@tribudubois.net> (raw)
In-Reply-To: <cover.1459590105.git.jcd@tribudubois.net>

The sabrelite supports one SPI FLASH memory on SPI1

Signed-off-by: Jean-Christophe Dubois <jcd@tribudubois.net>
---

Changes since V1:
 * Output a message and exit if RAM size is unsupported.

Changes since V2:
 * Added include "qemu/osdep.h"
 * Added access to controllers through properties. 
 
Changes since V3:
 * None

Changes since V4: 
 * Added a TODO.
 
Changes since V5:
 * None

 hw/arm/Makefile.objs |   2 +-
 hw/arm/sabrelite.c   | 122 +++++++++++++++++++++++++++++++++++++++++++++++++++
 2 files changed, 123 insertions(+), 1 deletion(-)
 create mode 100644 hw/arm/sabrelite.c

diff --git a/hw/arm/Makefile.objs b/hw/arm/Makefile.objs
index 2b20e49..12764ef 100644
--- a/hw/arm/Makefile.objs
+++ b/hw/arm/Makefile.objs
@@ -16,5 +16,5 @@ obj-$(CONFIG_STM32F205_SOC) += stm32f205_soc.o
 obj-$(CONFIG_XLNX_ZYNQMP) += xlnx-zynqmp.o xlnx-ep108.o
 obj-$(CONFIG_FSL_IMX25) += fsl-imx25.o imx25_pdk.o
 obj-$(CONFIG_FSL_IMX31) += fsl-imx31.o kzm.o
-obj-$(CONFIG_FSL_IMX6) += fsl-imx6.o
+obj-$(CONFIG_FSL_IMX6) += fsl-imx6.o sabrelite.o
 obj-$(CONFIG_ASPEED_SOC) += ast2400.o palmetto-bmc.o
diff --git a/hw/arm/sabrelite.c b/hw/arm/sabrelite.c
new file mode 100644
index 0000000..4037327
--- /dev/null
+++ b/hw/arm/sabrelite.c
@@ -0,0 +1,122 @@
+/*
+ * SABRELITE Board System emulation.
+ *
+ * Copyright (c) 2015 Jean-Christophe Dubois <jcd@tribudubois.net>
+ *
+ * This code is licensed under the GPL, version 2 or later.
+ * See the file `COPYING' in the top level directory.
+ *
+ * It (partially) emulates a sabrelite board, with a Freescale
+ * i.MX6 SoC
+ */
+
+#include "qemu/osdep.h"
+#include "hw/arm/fsl-imx6.h"
+#include "hw/boards.h"
+#include "qemu/error-report.h"
+#include "exec/address-spaces.h"
+#include "net/net.h"
+#include "hw/devices.h"
+#include "hw/char/serial.h"
+#include "sysemu/qtest.h"
+
+typedef struct IMX6Sabrelite {
+    FslIMX6State soc;
+    MemoryRegion ram;
+} IMX6Sabrelite;
+
+static struct arm_boot_info sabrelite_binfo = {
+    /* DDR memory start */
+    .loader_start = FSL_IMX6_MMDC_ADDR,
+    /* No board ID, we boot from DT tree */
+    .board_id = -1,
+};
+
+/* No need to do any particular setup for secondary boot */
+static void sabrelite_write_secondary(ARMCPU *cpu,
+                                      const struct arm_boot_info *info)
+{
+}
+
+/* Secondary cores are reset through SRC device */
+static void sabrelite_reset_secondary(ARMCPU *cpu,
+                                      const struct arm_boot_info *info)
+{
+}
+
+static void sabrelite_init(MachineState *machine)
+{
+    IMX6Sabrelite *s = g_new0(IMX6Sabrelite, 1);
+    Error *err = NULL;
+
+    /* Check the amount of memory is compatible with the SOC */
+    if (machine->ram_size > FSL_IMX6_MMDC_SIZE) {
+        error_report("RAM size " RAM_ADDR_FMT " above max supported (%08x)",
+                     machine->ram_size, FSL_IMX6_MMDC_SIZE);
+        exit(1);
+    }
+
+    object_initialize(&s->soc, sizeof(s->soc), TYPE_FSL_IMX6);
+    object_property_add_child(OBJECT(machine), "soc", OBJECT(&s->soc),
+                              &error_abort);
+
+    object_property_set_bool(OBJECT(&s->soc), true, "realized", &err);
+    if (err != NULL) {
+        error_report("%s", error_get_pretty(err));
+        exit(1);
+    }
+
+    memory_region_allocate_system_memory(&s->ram, NULL, "sabrelite.ram",
+                                         machine->ram_size);
+    memory_region_add_subregion(get_system_memory(), FSL_IMX6_MMDC_ADDR,
+                                &s->ram);
+
+    {
+        /*
+         * TODO: Ideally we would expose the chip select and spi bus on the
+         * SoC object using alias properties; then we would not need to
+         * directly access the underlying spi device object.
+         */
+        /* Add the sst25vf016b NOR FLASH memory to first SPI */
+        Object *spi_dev;
+
+        spi_dev = object_resolve_path_component(OBJECT(&s->soc), "spi1");
+        if (spi_dev) {
+            SSIBus *spi_bus;
+
+            spi_bus = (SSIBus *)qdev_get_child_bus(DEVICE(spi_dev), "spi");
+            if (spi_bus) {
+                DeviceState *flash_dev;
+
+                flash_dev = ssi_create_slave(spi_bus, "sst25vf016b");
+                if (flash_dev) {
+                    qemu_irq cs_line = qdev_get_gpio_in_named(flash_dev,
+                                                              SSI_GPIO_CS, 0);
+                    sysbus_connect_irq(SYS_BUS_DEVICE(spi_dev), 1, cs_line);
+                }
+            }
+        }
+    }
+
+    sabrelite_binfo.ram_size = machine->ram_size;
+    sabrelite_binfo.kernel_filename = machine->kernel_filename;
+    sabrelite_binfo.kernel_cmdline = machine->kernel_cmdline;
+    sabrelite_binfo.initrd_filename = machine->initrd_filename;
+    sabrelite_binfo.nb_cpus = smp_cpus;
+    sabrelite_binfo.secure_boot = true;
+    sabrelite_binfo.write_secondary_boot = sabrelite_write_secondary;
+    sabrelite_binfo.secondary_cpu_reset_hook = sabrelite_reset_secondary;
+
+    if (!qtest_enabled()) {
+        arm_load_kernel(&s->soc.cpu[0], &sabrelite_binfo);
+    }
+}
+
+static void sabrelite_machine_init(MachineClass *mc)
+{
+    mc->desc = "Freescale i.MX6 Quad SABRE Lite Board (Cortex A9)";
+    mc->init = sabrelite_init;
+    mc->max_cpus = FSL_IMX6_NUM_CPUS;
+}
+
+DEFINE_MACHINE("sabrelite", sabrelite_machine_init)
-- 
2.5.0
