| /* |
| * 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 |
| * |
| * Raspberry Pi 3 emulation Copyright (c) 2018 Zoltán Baldaszti |
| * Upstream code cleanup (c) 2018 Pekka Enberg |
| * |
| * This code is licensed under the GNU GPLv2 and later. |
| */ |
| |
| #include "qemu/osdep.h" |
| #include "qemu/units.h" |
| #include "qapi/error.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/boot.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_2 0x8000 /* Pi 2 loads kernel.img here by default */ |
| #define FIRMWARE_ADDR_3 0x80000 /* Pi 3 loads kernel.img here by default */ |
| #define SPINTABLE_ADDR 0xd8 /* Pi 3 bootloader spintable */ |
| |
| /* Table of Linux board IDs for different Pi versions */ |
| static const int raspi_boardid[] = {[1] = 0xc42, [2] = 0xc43, [3] = 0xc44}; |
| |
| typedef struct RasPiState { |
| BCM283XState 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_smpboot64(ARMCPU *cpu, const struct arm_boot_info *info) |
| { |
| /* Unlike the AArch32 version we don't need to call the board setup hook. |
| * The mechanism for doing the spin-table is also entirely different. |
| * We must have four 64-bit fields at absolute addresses |
| * 0xd8, 0xe0, 0xe8, 0xf0 in RAM, which are the flag variables for |
| * our CPUs, and which we must ensure are zero initialized before |
| * the primary CPU goes into the kernel. We put these variables inside |
| * a rom blob, so that the reset for ROM contents zeroes them for us. |
| */ |
| static const uint32_t smpboot[] = { |
| 0xd2801b05, /* mov x5, 0xd8 */ |
| 0xd53800a6, /* mrs x6, mpidr_el1 */ |
| 0x924004c6, /* and x6, x6, #0x3 */ |
| 0xd503205f, /* spin: wfe */ |
| 0xf86678a4, /* ldr x4, [x5,x6,lsl #3] */ |
| 0xb4ffffc4, /* cbz x4, spin */ |
| 0xd2800000, /* mov x0, #0x0 */ |
| 0xd2800001, /* mov x1, #0x0 */ |
| 0xd2800002, /* mov x2, #0x0 */ |
| 0xd2800003, /* mov x3, #0x0 */ |
| 0xd61f0080, /* br x4 */ |
| }; |
| |
| static const uint64_t spintables[] = { |
| 0, 0, 0, 0 |
| }; |
| |
| rom_add_blob_fixed("raspi_smpboot", smpboot, sizeof(smpboot), |
| info->smp_loader_start); |
| rom_add_blob_fixed("raspi_spintables", spintables, sizeof(spintables), |
| SPINTABLE_ADDR); |
| } |
| |
| 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; |
| |
| if (version <= 2) { |
| /* The rpi1 and 2 require some custom setup code to run in Secure |
| * mode before booting a kernel (to set up the SMC vectors so |
| * that we get a no-op SMC; this is used by Linux to call the |
| * firmware for some cache maintenance operations. |
| * The rpi3 doesn't need this. |
| */ |
| binfo.board_setup_addr = BOARDSETUP_ADDR; |
| binfo.write_board_setup = write_board_setup; |
| binfo.secure_board_setup = true; |
| binfo.secure_boot = true; |
| } |
| |
| /* Pi2 and Pi3 requires SMP setup */ |
| if (version >= 2) { |
| binfo.smp_loader_start = SMPBOOT_ADDR; |
| if (version == 2) { |
| binfo.write_secondary_boot = write_smpboot; |
| } else { |
| binfo.write_secondary_boot = write_smpboot64; |
| } |
| 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) { |
| hwaddr firmware_addr = version == 3 ? FIRMWARE_ADDR_3 : FIRMWARE_ADDR_2; |
| /* 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 raspi_init(MachineState *machine, int version) |
| { |
| RasPiState *s = g_new0(RasPiState, 1); |
| uint32_t vcram_size; |
| DriveInfo *di; |
| BlockBackend *blk; |
| BusState *bus; |
| DeviceState *carddev; |
| |
| if (machine->ram_size > 1 * GiB) { |
| error_report("Requested ram size is too large for this machine: " |
| "maximum is 1GB"); |
| exit(1); |
| } |
| |
| object_initialize_child(OBJECT(machine), "soc", &s->soc, sizeof(s->soc), |
| version == 3 ? TYPE_BCM2837 : TYPE_BCM2836, |
| &error_abort, NULL); |
| |
| /* 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); |
| int board_rev = version == 3 ? 0xa02082 : 0xa21041; |
| object_property_set_int(OBJECT(&s->soc), board_rev, "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_uint(OBJECT(&s->soc), "vcram-size", |
| &error_abort); |
| setup_boot(machine, version, machine->ram_size - vcram_size); |
| } |
| |
| static void raspi2_init(MachineState *machine) |
| { |
| raspi_init(machine, 2); |
| } |
| |
| 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 = BCM283X_NCPUS; |
| mc->min_cpus = BCM283X_NCPUS; |
| mc->default_cpus = BCM283X_NCPUS; |
| mc->default_ram_size = 1024 * 1024 * 1024; |
| mc->ignore_memory_transaction_failures = true; |
| }; |
| DEFINE_MACHINE("raspi2", raspi2_machine_init) |
| |
| #ifdef TARGET_AARCH64 |
| static void raspi3_init(MachineState *machine) |
| { |
| raspi_init(machine, 3); |
| } |
| |
| static void raspi3_machine_init(MachineClass *mc) |
| { |
| mc->desc = "Raspberry Pi 3"; |
| mc->init = raspi3_init; |
| mc->block_default_type = IF_SD; |
| mc->no_parallel = 1; |
| mc->no_floppy = 1; |
| mc->no_cdrom = 1; |
| mc->max_cpus = BCM283X_NCPUS; |
| mc->min_cpus = BCM283X_NCPUS; |
| mc->default_cpus = BCM283X_NCPUS; |
| mc->default_ram_size = 1024 * 1024 * 1024; |
| } |
| DEFINE_MACHINE("raspi3", raspi3_machine_init) |
| #endif |
