| /* |
| * 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 work is licensed under the terms of the GNU GPL, version 2 or later. |
| * See the COPYING file in the top-level directory. |
| */ |
| |
| #include "qemu/osdep.h" |
| #include "qemu/units.h" |
| #include "qemu/cutils.h" |
| #include "qapi/error.h" |
| #include "hw/arm/boot.h" |
| #include "hw/arm/bcm2836.h" |
| #include "hw/arm/bcm2838.h" |
| #include "hw/arm/raspi_platform.h" |
| #include "hw/registerfields.h" |
| #include "qemu/error-report.h" |
| #include "hw/boards.h" |
| #include "hw/loader.h" |
| #include "hw/arm/boot.h" |
| #include "qom/object.h" |
| |
| #define TYPE_RASPI_MACHINE MACHINE_TYPE_NAME("raspi-common") |
| OBJECT_DECLARE_SIMPLE_TYPE(RaspiMachineState, RASPI_MACHINE) |
| |
| #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 */ |
| |
| struct RaspiMachineState { |
| /*< private >*/ |
| RaspiBaseMachineState parent_obj; |
| /*< public >*/ |
| BCM283XState soc; |
| }; |
| |
| /* |
| * Board revision codes: |
| * www.raspberrypi.org/documentation/hardware/raspberrypi/revision-codes/ |
| */ |
| FIELD(REV_CODE, REVISION, 0, 4); |
| FIELD(REV_CODE, TYPE, 4, 8); |
| FIELD(REV_CODE, PROCESSOR, 12, 4); |
| FIELD(REV_CODE, MANUFACTURER, 16, 4); |
| FIELD(REV_CODE, MEMORY_SIZE, 20, 3); |
| FIELD(REV_CODE, STYLE, 23, 1); |
| |
| typedef enum RaspiProcessorId { |
| PROCESSOR_ID_BCM2835 = 0, |
| PROCESSOR_ID_BCM2836 = 1, |
| PROCESSOR_ID_BCM2837 = 2, |
| PROCESSOR_ID_BCM2838 = 3, |
| } RaspiProcessorId; |
| |
| static const struct { |
| const char *type; |
| int cores_count; |
| } soc_property[] = { |
| [PROCESSOR_ID_BCM2835] = {TYPE_BCM2835, 1}, |
| [PROCESSOR_ID_BCM2836] = {TYPE_BCM2836, BCM283X_NCPUS}, |
| [PROCESSOR_ID_BCM2837] = {TYPE_BCM2837, BCM283X_NCPUS}, |
| [PROCESSOR_ID_BCM2838] = {TYPE_BCM2838, BCM283X_NCPUS}, |
| }; |
| |
| uint64_t board_ram_size(uint32_t board_rev) |
| { |
| assert(FIELD_EX32(board_rev, REV_CODE, STYLE)); /* Only new style */ |
| return 256 * MiB << FIELD_EX32(board_rev, REV_CODE, MEMORY_SIZE); |
| } |
| |
| static RaspiProcessorId board_processor_id(uint32_t board_rev) |
| { |
| int proc_id = FIELD_EX32(board_rev, REV_CODE, PROCESSOR); |
| |
| assert(FIELD_EX32(board_rev, REV_CODE, STYLE)); /* Only new style */ |
| assert(proc_id < ARRAY_SIZE(soc_property) && soc_property[proc_id].type); |
| |
| return proc_id; |
| } |
| |
| const char *board_soc_type(uint32_t board_rev) |
| { |
| return soc_property[board_processor_id(board_rev)].type; |
| } |
| |
| static int cores_count(uint32_t board_rev) |
| { |
| return soc_property[board_processor_id(board_rev)].cores_count; |
| } |
| |
| static const char *board_type(uint32_t board_rev) |
| { |
| static const char *types[] = { |
| "A", "B", "A+", "B+", "2B", "Alpha", "CM1", NULL, "3B", "Zero", |
| "CM3", NULL, "Zero W", "3B+", "3A+", NULL, "CM3+", "4B", |
| }; |
| assert(FIELD_EX32(board_rev, REV_CODE, STYLE)); /* Only new style */ |
| int bt = FIELD_EX32(board_rev, REV_CODE, TYPE); |
| if (bt >= ARRAY_SIZE(types) || !types[bt]) { |
| return "Unknown"; |
| } |
| return types[bt]; |
| } |
| |
| static void write_smpboot(ARMCPU *cpu, const struct arm_boot_info *info) |
| { |
| static const ARMInsnFixup 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) */ |
| { 0, FIXUP_TERMINATOR } |
| }; |
| static const uint32_t fixupcontext[FIXUP_MAX] = { 0 }; |
| |
| /* 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); |
| |
| arm_write_bootloader("raspi_smpboot", arm_boot_address_space(cpu, info), |
| info->smp_loader_start, smpboot, fixupcontext); |
| } |
| |
| static void write_smpboot64(ARMCPU *cpu, const struct arm_boot_info *info) |
| { |
| AddressSpace *as = arm_boot_address_space(cpu, 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 ARMInsnFixup 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 */ |
| { 0, FIXUP_TERMINATOR } |
| }; |
| static const uint32_t fixupcontext[FIXUP_MAX] = { 0 }; |
| |
| static const uint64_t spintables[] = { |
| 0, 0, 0, 0 |
| }; |
| |
| arm_write_bootloader("raspi_smpboot", as, info->smp_loader_start, |
| smpboot, fixupcontext); |
| rom_add_blob_fixed_as("raspi_spintables", spintables, sizeof(spintables), |
| SPINTABLE_ADDR, as); |
| } |
| |
| 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, ARMCPU *cpu, |
| RaspiProcessorId processor_id, size_t ram_size) |
| { |
| RaspiBaseMachineState *s = RASPI_BASE_MACHINE(machine); |
| int r; |
| |
| s->binfo.ram_size = ram_size; |
| |
| if (processor_id <= PROCESSOR_ID_BCM2836) { |
| /* |
| * The BCM2835 and BCM2836 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 BCM2837 doesn't need this. |
| */ |
| s->binfo.board_setup_addr = BOARDSETUP_ADDR; |
| s->binfo.write_board_setup = write_board_setup; |
| s->binfo.secure_board_setup = true; |
| s->binfo.secure_boot = true; |
| } |
| |
| /* BCM2836 and BCM2837 requires SMP setup */ |
| if (processor_id >= PROCESSOR_ID_BCM2836) { |
| s->binfo.smp_loader_start = SMPBOOT_ADDR; |
| if (processor_id == PROCESSOR_ID_BCM2836) { |
| s->binfo.write_secondary_boot = write_smpboot; |
| } else { |
| s->binfo.write_secondary_boot = write_smpboot64; |
| } |
| s->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 = processor_id <= PROCESSOR_ID_BCM2836 |
| ? FIRMWARE_ADDR_2 : FIRMWARE_ADDR_3; |
| /* 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); |
| } |
| |
| s->binfo.entry = firmware_addr; |
| s->binfo.firmware_loaded = true; |
| } |
| |
| arm_load_kernel(cpu, machine, &s->binfo); |
| } |
| |
| void raspi_base_machine_init(MachineState *machine, |
| BCM283XBaseState *soc) |
| { |
| RaspiBaseMachineClass *mc = RASPI_BASE_MACHINE_GET_CLASS(machine); |
| uint32_t board_rev = mc->board_rev; |
| uint64_t ram_size = board_ram_size(board_rev); |
| uint32_t vcram_base, vcram_size; |
| size_t boot_ram_size; |
| DriveInfo *di; |
| BlockBackend *blk; |
| BusState *bus; |
| DeviceState *carddev; |
| |
| if (machine->ram_size != ram_size) { |
| char *size_str = size_to_str(ram_size); |
| error_report("Invalid RAM size, should be %s", size_str); |
| g_free(size_str); |
| exit(1); |
| } |
| |
| /* FIXME: Remove when we have custom CPU address space support */ |
| memory_region_add_subregion_overlap(get_system_memory(), 0, |
| machine->ram, 0); |
| |
| /* Setup the SOC */ |
| object_property_add_const_link(OBJECT(soc), "ram", OBJECT(machine->ram)); |
| object_property_set_int(OBJECT(soc), "board-rev", board_rev, |
| &error_abort); |
| object_property_set_str(OBJECT(soc), "command-line", |
| machine->kernel_cmdline, &error_abort); |
| qdev_realize(DEVICE(soc), NULL, &error_fatal); |
| |
| /* Create and plug in the SD cards */ |
| di = drive_get(IF_SD, 0, 0); |
| blk = di ? blk_by_legacy_dinfo(di) : NULL; |
| bus = qdev_get_child_bus(DEVICE(soc), "sd-bus"); |
| if (bus == NULL) { |
| error_report("No SD bus found in SOC object"); |
| exit(1); |
| } |
| carddev = qdev_new(TYPE_SD_CARD); |
| qdev_prop_set_drive_err(carddev, "drive", blk, &error_fatal); |
| qdev_realize_and_unref(carddev, bus, &error_fatal); |
| |
| vcram_size = object_property_get_uint(OBJECT(soc), "vcram-size", |
| &error_abort); |
| vcram_base = object_property_get_uint(OBJECT(soc), "vcram-base", |
| &error_abort); |
| |
| if (vcram_base == 0) { |
| vcram_base = ram_size - vcram_size; |
| } |
| boot_ram_size = MIN(vcram_base, UPPER_RAM_BASE - vcram_size); |
| |
| setup_boot(machine, &soc->cpu[0].core, board_processor_id(board_rev), |
| boot_ram_size); |
| } |
| |
| void raspi_machine_init(MachineState *machine) |
| { |
| RaspiMachineState *s = RASPI_MACHINE(machine); |
| RaspiBaseMachineState *s_base = RASPI_BASE_MACHINE(machine); |
| RaspiBaseMachineClass *mc = RASPI_BASE_MACHINE_GET_CLASS(machine); |
| BCM283XState *soc = &s->soc; |
| |
| s_base->binfo.board_id = MACH_TYPE_BCM2708; |
| |
| object_initialize_child(OBJECT(machine), "soc", soc, |
| board_soc_type(mc->board_rev)); |
| raspi_base_machine_init(machine, &soc->parent_obj); |
| } |
| |
| void raspi_machine_class_common_init(MachineClass *mc, |
| uint32_t board_rev) |
| { |
| mc->desc = g_strdup_printf("Raspberry Pi %s (revision 1.%u)", |
| board_type(board_rev), |
| FIELD_EX32(board_rev, REV_CODE, REVISION)); |
| mc->block_default_type = IF_SD; |
| mc->no_parallel = 1; |
| mc->no_floppy = 1; |
| mc->no_cdrom = 1; |
| mc->default_cpus = mc->min_cpus = mc->max_cpus = cores_count(board_rev); |
| mc->default_ram_size = board_ram_size(board_rev); |
| mc->default_ram_id = "ram"; |
| }; |
| |
| static void raspi_machine_class_init(MachineClass *mc, |
| uint32_t board_rev) |
| { |
| raspi_machine_class_common_init(mc, board_rev); |
| mc->init = raspi_machine_init; |
| }; |
| |
| static void raspi0_machine_class_init(ObjectClass *oc, void *data) |
| { |
| MachineClass *mc = MACHINE_CLASS(oc); |
| RaspiBaseMachineClass *rmc = RASPI_BASE_MACHINE_CLASS(oc); |
| |
| rmc->board_rev = 0x920092; /* Revision 1.2 */ |
| raspi_machine_class_init(mc, rmc->board_rev); |
| }; |
| |
| static void raspi1ap_machine_class_init(ObjectClass *oc, void *data) |
| { |
| MachineClass *mc = MACHINE_CLASS(oc); |
| RaspiBaseMachineClass *rmc = RASPI_BASE_MACHINE_CLASS(oc); |
| |
| rmc->board_rev = 0x900021; /* Revision 1.1 */ |
| raspi_machine_class_init(mc, rmc->board_rev); |
| }; |
| |
| static void raspi2b_machine_class_init(ObjectClass *oc, void *data) |
| { |
| MachineClass *mc = MACHINE_CLASS(oc); |
| RaspiBaseMachineClass *rmc = RASPI_BASE_MACHINE_CLASS(oc); |
| |
| rmc->board_rev = 0xa21041; |
| raspi_machine_class_init(mc, rmc->board_rev); |
| }; |
| |
| #ifdef TARGET_AARCH64 |
| static void raspi3ap_machine_class_init(ObjectClass *oc, void *data) |
| { |
| MachineClass *mc = MACHINE_CLASS(oc); |
| RaspiBaseMachineClass *rmc = RASPI_BASE_MACHINE_CLASS(oc); |
| |
| rmc->board_rev = 0x9020e0; /* Revision 1.0 */ |
| raspi_machine_class_init(mc, rmc->board_rev); |
| }; |
| |
| static void raspi3b_machine_class_init(ObjectClass *oc, void *data) |
| { |
| MachineClass *mc = MACHINE_CLASS(oc); |
| RaspiBaseMachineClass *rmc = RASPI_BASE_MACHINE_CLASS(oc); |
| |
| rmc->board_rev = 0xa02082; |
| raspi_machine_class_init(mc, rmc->board_rev); |
| }; |
| #endif /* TARGET_AARCH64 */ |
| |
| static const TypeInfo raspi_machine_types[] = { |
| { |
| .name = MACHINE_TYPE_NAME("raspi0"), |
| .parent = TYPE_RASPI_MACHINE, |
| .class_init = raspi0_machine_class_init, |
| }, { |
| .name = MACHINE_TYPE_NAME("raspi1ap"), |
| .parent = TYPE_RASPI_MACHINE, |
| .class_init = raspi1ap_machine_class_init, |
| }, { |
| .name = MACHINE_TYPE_NAME("raspi2b"), |
| .parent = TYPE_RASPI_MACHINE, |
| .class_init = raspi2b_machine_class_init, |
| #ifdef TARGET_AARCH64 |
| }, { |
| .name = MACHINE_TYPE_NAME("raspi3ap"), |
| .parent = TYPE_RASPI_MACHINE, |
| .class_init = raspi3ap_machine_class_init, |
| }, { |
| .name = MACHINE_TYPE_NAME("raspi3b"), |
| .parent = TYPE_RASPI_MACHINE, |
| .class_init = raspi3b_machine_class_init, |
| #endif |
| }, { |
| .name = TYPE_RASPI_MACHINE, |
| .parent = TYPE_RASPI_BASE_MACHINE, |
| .instance_size = sizeof(RaspiMachineState), |
| .abstract = true, |
| }, { |
| .name = TYPE_RASPI_BASE_MACHINE, |
| .parent = TYPE_MACHINE, |
| .instance_size = sizeof(RaspiBaseMachineState), |
| .class_size = sizeof(RaspiBaseMachineClass), |
| .abstract = true, |
| } |
| }; |
| |
| DEFINE_TYPES(raspi_machine_types) |
