Merge "These changes are the raw update to qemu-2.6."

1 files changed, 172 insertions, 0 deletions

diff --git a/qemu/hw/arm/raspi.c b/qemu/hw/arm/raspi.c
new file mode 100644
index 000000000..2b295f14c
--- /dev/null
+++ b/qemu/hw/arm/raspi.c
@@ -0,0 +1,172 @@
+/*
+ * 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 "qemu/osdep.h"
+#include "qapi/error.h"
+#include "qemu-common.h"
+#include "cpu.h"
+#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);
+    uint32_t vcram_size;
+    DriveInfo *di;
+    BlockBackend *blk;
+    BusState *bus;
+    DeviceState *carddev;
+
+    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_int(OBJECT(&s->soc), 0xa21041, "board-rev",
+                            &error_abort);
+    object_property_set_bool(OBJECT(&s->soc), true, "realized", &error_abort);
+
+    /* Create and plug in the SD cards */
+    di = drive_get_next(IF_SD);
+    blk = di ? blk_by_legacy_dinfo(di) : NULL;
+    bus = qdev_get_child_bus(DEVICE(&s->soc), "sd-bus");
+    if (bus == NULL) {
+        error_report("No SD bus found in SOC object");
+        exit(1);
+    }
+    carddev = qdev_create(bus, TYPE_SD_CARD);
+    qdev_prop_set_drive(carddev, "drive", blk, &error_fatal);
+    object_property_set_bool(OBJECT(carddev), true, "realized", &error_fatal);
+
+    vcram_size = object_property_get_int(OBJECT(&s->soc), "vcram-size",
+                                         &error_abort);
+    setup_boot(machine, 2, machine->ram_size - vcram_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;
+    mc->default_ram_size = 1024 * 1024 * 1024;
+};
+DEFINE_MACHINE("raspi2", raspi2_machine_init)