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authorAndrew Baumann <Andrew.Baumann@microsoft.com>2016-01-29 14:50:44 -0800
committerPeter Maydell <peter.maydell@linaro.org>2016-02-03 15:00:47 +0000
commit1df7d1f9303aef9a2b1f703e887553416b7c0586 (patch)
tree43069f6a5ddf05b17b6b3d2962cf81c84655fe12
parent716536a9b6688710909aef69ac842bcc66039b92 (diff)
downloadqemu-arm-pull-target-arm-20160203.tar.gz
raspi: add raspberry pi 2 machinepull-target-arm-20160203
Reviewed-by: Peter Crosthwaite <crosthwaite.peter@gmail.com> Signed-off-by: Andrew Baumann <Andrew.Baumann@microsoft.com> Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
-rw-r--r--hw/arm/Makefile.objs2
-rw-r--r--hw/arm/raspi.c152
2 files changed, 153 insertions, 1 deletions
diff --git a/hw/arm/Makefile.objs b/hw/arm/Makefile.objs
index f55f8d25d3..a711e4df61 100644
--- a/hw/arm/Makefile.objs
+++ b/hw/arm/Makefile.objs
@@ -11,7 +11,7 @@ obj-y += armv7m.o exynos4210.o pxa2xx.o pxa2xx_gpio.o pxa2xx_pic.o
obj-$(CONFIG_DIGIC) += digic.o
obj-y += omap1.o omap2.o strongarm.o
obj-$(CONFIG_ALLWINNER_A10) += allwinner-a10.o cubieboard.o
-obj-$(CONFIG_RASPI) += bcm2835_peripherals.o bcm2836.o
+obj-$(CONFIG_RASPI) += bcm2835_peripherals.o bcm2836.o raspi.o
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
diff --git a/hw/arm/raspi.c b/hw/arm/raspi.c
new file mode 100644
index 0000000000..0c9427c40e
--- /dev/null
+++ b/hw/arm/raspi.c
@@ -0,0 +1,152 @@
+/*
+ * Raspberry Pi emulation (c) 2012 Gregory Estrade
+ * Upstreaming code cleanup [including bcm2835_*] (c) 2013 Jan Petrous
+ *
+ * Rasperry Pi 2 emulation Copyright (c) 2015, Microsoft
+ * Written by Andrew Baumann
+ *
+ * This code is licensed under the GNU GPLv2 and later.
+ */
+
+#include "hw/arm/bcm2836.h"
+#include "qemu/error-report.h"
+#include "hw/boards.h"
+#include "hw/loader.h"
+#include "hw/arm/arm.h"
+#include "sysemu/sysemu.h"
+
+#define SMPBOOT_ADDR 0x300 /* this should leave enough space for ATAGS */
+#define MVBAR_ADDR 0x400 /* secure vectors */
+#define BOARDSETUP_ADDR (MVBAR_ADDR + 0x20) /* board setup code */
+#define FIRMWARE_ADDR 0x8000 /* Pi loads kernel.img here by default */
+
+/* Table of Linux board IDs for different Pi versions */
+static const int raspi_boardid[] = {[1] = 0xc42, [2] = 0xc43};
+
+typedef struct RasPiState {
+ BCM2836State soc;
+ MemoryRegion ram;
+} RasPiState;
+
+static void write_smpboot(ARMCPU *cpu, const struct arm_boot_info *info)
+{
+ static const uint32_t smpboot[] = {
+ 0xe1a0e00f, /* mov lr, pc */
+ 0xe3a0fe00 + (BOARDSETUP_ADDR >> 4), /* mov pc, BOARDSETUP_ADDR */
+ 0xee100fb0, /* mrc p15, 0, r0, c0, c0, 5;get core ID */
+ 0xe7e10050, /* ubfx r0, r0, #0, #2 ;extract LSB */
+ 0xe59f5014, /* ldr r5, =0x400000CC ;load mbox base */
+ 0xe320f001, /* 1: yield */
+ 0xe7953200, /* ldr r3, [r5, r0, lsl #4] ;read mbox for our core*/
+ 0xe3530000, /* cmp r3, #0 ;spin while zero */
+ 0x0afffffb, /* beq 1b */
+ 0xe7853200, /* str r3, [r5, r0, lsl #4] ;clear mbox */
+ 0xe12fff13, /* bx r3 ;jump to target */
+ 0x400000cc, /* (constant: mailbox 3 read/clear base) */
+ };
+
+ /* check that we don't overrun board setup vectors */
+ QEMU_BUILD_BUG_ON(SMPBOOT_ADDR + sizeof(smpboot) > MVBAR_ADDR);
+ /* check that board setup address is correctly relocated */
+ QEMU_BUILD_BUG_ON((BOARDSETUP_ADDR & 0xf) != 0
+ || (BOARDSETUP_ADDR >> 4) >= 0x100);
+
+ rom_add_blob_fixed("raspi_smpboot", smpboot, sizeof(smpboot),
+ info->smp_loader_start);
+}
+
+static void write_board_setup(ARMCPU *cpu, const struct arm_boot_info *info)
+{
+ arm_write_secure_board_setup_dummy_smc(cpu, info, MVBAR_ADDR);
+}
+
+static void reset_secondary(ARMCPU *cpu, const struct arm_boot_info *info)
+{
+ CPUState *cs = CPU(cpu);
+ cpu_set_pc(cs, info->smp_loader_start);
+}
+
+static void setup_boot(MachineState *machine, int version, size_t ram_size)
+{
+ static struct arm_boot_info binfo;
+ int r;
+
+ binfo.board_id = raspi_boardid[version];
+ binfo.ram_size = ram_size;
+ binfo.nb_cpus = smp_cpus;
+ binfo.board_setup_addr = BOARDSETUP_ADDR;
+ binfo.write_board_setup = write_board_setup;
+ binfo.secure_board_setup = true;
+ binfo.secure_boot = true;
+
+ /* Pi2 requires SMP setup */
+ if (version == 2) {
+ binfo.smp_loader_start = SMPBOOT_ADDR;
+ binfo.write_secondary_boot = write_smpboot;
+ binfo.secondary_cpu_reset_hook = reset_secondary;
+ }
+
+ /* If the user specified a "firmware" image (e.g. UEFI), we bypass
+ * the normal Linux boot process
+ */
+ if (machine->firmware) {
+ /* load the firmware image (typically kernel.img) */
+ r = load_image_targphys(machine->firmware, FIRMWARE_ADDR,
+ ram_size - FIRMWARE_ADDR);
+ if (r < 0) {
+ error_report("Failed to load firmware from %s", machine->firmware);
+ exit(1);
+ }
+
+ binfo.entry = FIRMWARE_ADDR;
+ binfo.firmware_loaded = true;
+ } else {
+ binfo.kernel_filename = machine->kernel_filename;
+ binfo.kernel_cmdline = machine->kernel_cmdline;
+ binfo.initrd_filename = machine->initrd_filename;
+ }
+
+ arm_load_kernel(ARM_CPU(first_cpu), &binfo);
+}
+
+static void raspi2_init(MachineState *machine)
+{
+ RasPiState *s = g_new0(RasPiState, 1);
+
+ object_initialize(&s->soc, sizeof(s->soc), TYPE_BCM2836);
+ object_property_add_child(OBJECT(machine), "soc", OBJECT(&s->soc),
+ &error_abort);
+
+ /* Allocate and map RAM */
+ memory_region_allocate_system_memory(&s->ram, OBJECT(machine), "ram",
+ machine->ram_size);
+ /* FIXME: Remove when we have custom CPU address space support */
+ memory_region_add_subregion_overlap(get_system_memory(), 0, &s->ram, 0);
+
+ /* Setup the SOC */
+ object_property_add_const_link(OBJECT(&s->soc), "ram", OBJECT(&s->ram),
+ &error_abort);
+ object_property_set_int(OBJECT(&s->soc), smp_cpus, "enabled-cpus",
+ &error_abort);
+ object_property_set_bool(OBJECT(&s->soc), true, "realized", &error_abort);
+
+ setup_boot(machine, 2, machine->ram_size);
+}
+
+static void raspi2_machine_init(MachineClass *mc)
+{
+ mc->desc = "Raspberry Pi 2";
+ mc->init = raspi2_init;
+ mc->block_default_type = IF_SD;
+ mc->no_parallel = 1;
+ mc->no_floppy = 1;
+ mc->no_cdrom = 1;
+ mc->max_cpus = BCM2836_NCPUS;
+
+ /* XXX: Temporary restriction in RAM size from the full 1GB. Since
+ * we do not yet support the framebuffer / GPU, we need to limit
+ * RAM usable by the OS to sit below the peripherals.
+ */
+ mc->default_ram_size = 0x3F000000; /* BCM2836_PERI_BASE */
+};
+DEFINE_MACHINE("raspi2", raspi2_machine_init)