| /* SPDX-License-Identifier: GPL-2.0-or-later */ |
| |
| #include <arch/null_breakpoint.h> |
| #include <arch/symbols.h> |
| #include <assert.h> |
| #include <cbfs.h> |
| #include <cbmem.h> |
| #include <cf9_reset.h> |
| #include <console/console.h> |
| #include <elog.h> |
| #include <fsp/api.h> |
| #include <fsp/util.h> |
| #include <memrange.h> |
| #include <mode_switch.h> |
| #include <mrc_cache.h> |
| #include <program_loading.h> |
| #include <romstage_handoff.h> |
| #include <security/tpm/tspi.h> |
| #include <security/vboot/antirollback.h> |
| #include <security/vboot/vboot_common.h> |
| #include <string.h> |
| #include <symbols.h> |
| #include <timestamp.h> |
| #include <types.h> |
| #include <vb2_api.h> |
| |
| static uint8_t temp_ram[CONFIG_FSP_TEMP_RAM_SIZE] __aligned(sizeof(uint64_t)); |
| |
| static void save_memory_training_data(uint32_t fsp_version) |
| { |
| size_t mrc_data_size; |
| const void *mrc_data; |
| |
| mrc_data = fsp_find_nv_storage_data(&mrc_data_size); |
| if (!mrc_data) { |
| printk(BIOS_ERR, "FSP_NON_VOLATILE_STORAGE_HOB missing!\n"); |
| return; |
| } |
| |
| /* |
| * Save MRC Data to CBMEM. By always saving the data this forces |
| * a retrain after a trip through ChromeOS recovery path. The |
| * code which saves the data to flash doesn't write if the latest |
| * training data matches this one. |
| */ |
| if (mrc_cache_stash_data(MRC_TRAINING_DATA, fsp_version, mrc_data, |
| mrc_data_size) < 0) |
| printk(BIOS_ERR, "Failed to stash MRC data\n"); |
| } |
| |
| static void do_fsp_post_memory_init(bool s3wake, uint32_t fsp_version) |
| { |
| struct range_entry fsp_mem; |
| |
| fsp_find_reserved_memory(&fsp_mem); |
| |
| /* initialize cbmem by adding FSP reserved memory first thing */ |
| if (!s3wake) { |
| cbmem_initialize_empty_id_size(CBMEM_ID_FSP_RESERVED_MEMORY, |
| range_entry_size(&fsp_mem)); |
| } else if (cbmem_initialize_id_size(CBMEM_ID_FSP_RESERVED_MEMORY, |
| range_entry_size(&fsp_mem))) { |
| if (CONFIG(HAVE_ACPI_RESUME)) { |
| printk(BIOS_ERR, "Failed to recover CBMEM in S3 resume.\n"); |
| /* Failed S3 resume, reset to come up cleanly */ |
| /* FIXME: A "system" reset is likely enough: */ |
| full_reset(); |
| } |
| } |
| |
| /* make sure FSP memory is reserved in cbmem */ |
| if (range_entry_base(&fsp_mem) != |
| (uintptr_t)cbmem_find(CBMEM_ID_FSP_RESERVED_MEMORY)) |
| die("Failed to accommodate FSP reserved memory request!\n"); |
| |
| if (CONFIG(CACHE_MRC_SETTINGS) && !s3wake) |
| save_memory_training_data(fsp_version); |
| |
| /* Create romstage handof information */ |
| romstage_handoff_init(s3wake); |
| } |
| |
| static void fsp_fill_mrc_cache(FSPM_ARCH_UPD *arch_upd, uint32_t fsp_version) |
| { |
| void *data; |
| size_t mrc_size; |
| |
| arch_upd->NvsBufferPtr = 0; |
| |
| if (!CONFIG(CACHE_MRC_SETTINGS)) |
| return; |
| |
| /* Assume boot device is memory mapped. */ |
| assert(CONFIG(BOOT_DEVICE_MEMORY_MAPPED)); |
| |
| data = mrc_cache_current_mmap_leak(MRC_TRAINING_DATA, fsp_version, |
| &mrc_size); |
| if (data == NULL) |
| return; |
| |
| /* MRC cache found */ |
| arch_upd->NvsBufferPtr = (uintptr_t)data; |
| |
| printk(BIOS_SPEW, "MRC cache found, size %zx\n", mrc_size); |
| } |
| |
| static enum cb_err check_region_overlap(const struct memranges *ranges, |
| const char *description, |
| uintptr_t begin, uintptr_t end) |
| { |
| const struct range_entry *r; |
| |
| memranges_each_entry(r, ranges) { |
| if (end <= range_entry_base(r)) |
| continue; |
| if (begin >= range_entry_end(r)) |
| continue; |
| printk(BIOS_CRIT, "'%s' overlaps currently running program: " |
| "[%p, %p)\n", description, (void *)begin, (void *)end); |
| return CB_ERR; |
| } |
| |
| return CB_SUCCESS; |
| } |
| |
| static enum cb_err setup_fsp_stack_frame(FSPM_ARCH_UPD *arch_upd, |
| const struct memranges *memmap) |
| { |
| uintptr_t stack_begin; |
| uintptr_t stack_end; |
| |
| /* |
| * FSPM_UPD passed here is populated with default values |
| * provided by the blob itself. We let FSPM use top of CAR |
| * region of the size it requests. |
| */ |
| stack_end = (uintptr_t)_car_region_end; |
| stack_begin = stack_end - arch_upd->StackSize; |
| if (check_region_overlap(memmap, "FSPM stack", stack_begin, |
| stack_end) != CB_SUCCESS) |
| return CB_ERR; |
| |
| arch_upd->StackBase = stack_begin; |
| return CB_SUCCESS; |
| } |
| |
| static enum cb_err fsp_fill_common_arch_params(FSPM_ARCH_UPD *arch_upd, |
| bool s3wake, uint32_t fsp_version, |
| const struct memranges *memmap) |
| { |
| /* |
| * FSP 2.1 version would use same stack as coreboot instead of |
| * setting up separate stack frame. FSP 2.1 would not relocate stack |
| * top and does not reinitialize stack pointer. The parameters passed |
| * as StackBase and StackSize are actually for temporary RAM and HOBs |
| * and are not related to FSP stack at all. |
| * Non-CAR FSP 2.0 platforms pass a DRAM location for the FSP stack. |
| */ |
| if (CONFIG(FSP_USES_CB_STACK) || !ENV_CACHE_AS_RAM) { |
| arch_upd->StackBase = (uintptr_t)temp_ram; |
| arch_upd->StackSize = sizeof(temp_ram); |
| } else if (setup_fsp_stack_frame(arch_upd, memmap)) { |
| return CB_ERR; |
| } |
| |
| fsp_fill_mrc_cache(arch_upd, fsp_version); |
| |
| /* Configure bootmode */ |
| if (s3wake) { |
| arch_upd->BootMode = FSP_BOOT_ON_S3_RESUME; |
| } else { |
| if (arch_upd->NvsBufferPtr) |
| arch_upd->BootMode = |
| FSP_BOOT_ASSUMING_NO_CONFIGURATION_CHANGES; |
| else |
| arch_upd->BootMode = FSP_BOOT_WITH_FULL_CONFIGURATION; |
| } |
| |
| printk(BIOS_SPEW, "bootmode is set to: %d\n", arch_upd->BootMode); |
| |
| return CB_SUCCESS; |
| } |
| |
| __weak |
| uint8_t fsp_memory_mainboard_version(void) |
| { |
| return 0; |
| } |
| |
| __weak |
| uint8_t fsp_memory_soc_version(void) |
| { |
| return 0; |
| } |
| |
| /* |
| * Allow SoC and/or mainboard to bump the revision of the FSP setting |
| * number. The FSP spec uses the low 8 bits as the build number. Take over |
| * bits 3:0 for the SoC setting and bits 7:4 for the mainboard. That way |
| * a tweak in the settings will bump the version used to track the cached |
| * setting which triggers retraining when the FSP version hasn't changed, but |
| * the SoC or mainboard settings have. |
| */ |
| static uint32_t fsp_memory_settings_version(const struct fsp_header *hdr) |
| { |
| /* Use the full FSP version by default. */ |
| uint32_t ver = hdr->image_revision; |
| |
| if (!CONFIG(FSP_PLATFORM_MEMORY_SETTINGS_VERSIONS)) |
| return ver; |
| |
| ver &= ~0xff; |
| ver |= (0xf & fsp_memory_mainboard_version()) << 4; |
| ver |= (0xf & fsp_memory_soc_version()) << 0; |
| |
| return ver; |
| } |
| |
| struct fspm_context { |
| struct fsp_header header; |
| struct memranges memmap; |
| }; |
| |
| static void do_fsp_memory_init(const struct fspm_context *context, bool s3wake) |
| { |
| uint32_t status; |
| fsp_memory_init_fn fsp_raminit; |
| FSPM_UPD fspm_upd, *upd; |
| FSPM_ARCH_UPD *arch_upd; |
| uint32_t fsp_version; |
| const struct fsp_header *hdr = &context->header; |
| const struct memranges *memmap = &context->memmap; |
| |
| post_code(POST_MEM_PREINIT_PREP_START); |
| |
| fsp_version = fsp_memory_settings_version(hdr); |
| |
| upd = (FSPM_UPD *)(uintptr_t)(hdr->cfg_region_offset + hdr->image_base); |
| |
| /* |
| * Verify UPD region size. We don't have malloc before ramstage, so we |
| * use a static buffer for the FSP-M UPDs which is sizeof(FSPM_UPD) |
| * bytes long, since that is the value known at compile time. If |
| * hdr->cfg_region_size is bigger than that, not all UPD defaults will |
| * be copied, so it'll contain random data at the end, so we just call |
| * die() in that case. If hdr->cfg_region_size is smaller than that, |
| * there's a mismatch between the FSP and the header, but since it will |
| * copy the full UPD defaults to the buffer, we try to continue and |
| * hope that there was no incompatible change in the UPDs. |
| */ |
| if (hdr->cfg_region_size > sizeof(FSPM_UPD)) |
| die("FSP-M UPD size is larger than FSPM_UPD struct size.\n"); |
| if (hdr->cfg_region_size < sizeof(FSPM_UPD)) |
| printk(BIOS_ERR, "FSP-M UPD size is smaller than FSPM_UPD struct size. " |
| "Check if the FSP binary matches the FSP headers.\n"); |
| |
| fsp_verify_upd_header_signature(upd->FspUpdHeader.Signature, FSPM_UPD_SIGNATURE); |
| |
| /* Copy the default values from the UPD area */ |
| memcpy(&fspm_upd, upd, sizeof(fspm_upd)); |
| |
| arch_upd = &fspm_upd.FspmArchUpd; |
| |
| /* Reserve enough memory under TOLUD to save CBMEM header */ |
| arch_upd->BootLoaderTolumSize = cbmem_overhead_size(); |
| |
| /* Fill common settings on behalf of chipset. */ |
| if (fsp_fill_common_arch_params(arch_upd, s3wake, fsp_version, |
| memmap) != CB_SUCCESS) |
| die_with_post_code(POST_INVALID_VENDOR_BINARY, |
| "FSPM_ARCH_UPD not found!\n"); |
| |
| /* Give SoC and mainboard a chance to update the UPD */ |
| platform_fsp_memory_init_params_cb(&fspm_upd, fsp_version); |
| |
| /* |
| * For S3 resume case, if valid mrc cache data is not found or |
| * RECOVERY_MRC_CACHE hash verification fails, the S3 data |
| * pointer would be null and S3 resume fails with fsp-m |
| * returning error. Invoking a reset here saves time. |
| */ |
| if (s3wake && !arch_upd->NvsBufferPtr) |
| /* FIXME: A "system" reset is likely enough: */ |
| full_reset(); |
| |
| if (CONFIG(MMA)) |
| setup_mma(&fspm_upd.FspmConfig); |
| |
| post_code(POST_MEM_PREINIT_PREP_END); |
| |
| /* Call FspMemoryInit */ |
| fsp_raminit = (void *)(uintptr_t)(hdr->image_base + hdr->fsp_memory_init_entry_offset); |
| fsp_debug_before_memory_init(fsp_raminit, upd, &fspm_upd); |
| |
| /* FSP disables the interrupt handler so remove debug exceptions temporarily */ |
| null_breakpoint_disable(); |
| post_code(POST_FSP_MEMORY_INIT); |
| timestamp_add_now(TS_FSP_MEMORY_INIT_START); |
| if (ENV_X86_64 && CONFIG(PLATFORM_USES_FSP2_X86_32)) |
| status = protected_mode_call_2arg(fsp_raminit, |
| (uintptr_t)&fspm_upd, |
| (uintptr_t)fsp_get_hob_list_ptr()); |
| else |
| status = fsp_raminit(&fspm_upd, fsp_get_hob_list_ptr()); |
| null_breakpoint_init(); |
| |
| post_code(POST_FSP_MEMORY_EXIT); |
| timestamp_add_now(TS_FSP_MEMORY_INIT_END); |
| |
| /* Handle any errors returned by FspMemoryInit */ |
| fsp_handle_reset(status); |
| if (status != FSP_SUCCESS) { |
| die_with_post_code(POST_RAM_FAILURE, |
| "FspMemoryInit returned with error 0x%08x!\n", status); |
| } |
| |
| do_fsp_post_memory_init(s3wake, fsp_version); |
| |
| /* |
| * fsp_debug_after_memory_init() checks whether the end of the tolum |
| * region is the same as the top of cbmem, so must be called here |
| * after cbmem has been initialised in do_fsp_post_memory_init(). |
| */ |
| fsp_debug_after_memory_init(status); |
| } |
| |
| static void *fspm_allocator(void *arg, size_t size, const union cbfs_mdata *unused) |
| { |
| const struct fsp_load_descriptor *fspld = arg; |
| struct fspm_context *context = fspld->arg; |
| struct memranges *memmap = &context->memmap; |
| |
| /* Non XIP FSP-M uses FSP-M address */ |
| uintptr_t fspm_begin = (uintptr_t)CONFIG_FSP_M_ADDR; |
| uintptr_t fspm_end = fspm_begin + size; |
| |
| if (check_region_overlap(memmap, "FSPM", fspm_begin, fspm_end) != CB_SUCCESS) |
| return NULL; |
| |
| return (void *)fspm_begin; |
| } |
| |
| void preload_fspm(void) |
| { |
| if (!CONFIG(CBFS_PRELOAD)) |
| return; |
| |
| printk(BIOS_DEBUG, "Preloading %s\n", CONFIG_FSP_M_CBFS); |
| cbfs_preload(CONFIG_FSP_M_CBFS); |
| } |
| |
| void fsp_memory_init(bool s3wake) |
| { |
| struct range_entry prog_ranges[2]; |
| struct fspm_context context; |
| struct fsp_load_descriptor fspld = { |
| .fsp_prog = PROG_INIT(PROG_REFCODE, CONFIG_FSP_M_CBFS), |
| .arg = &context, |
| }; |
| struct fsp_header *hdr = &context.header; |
| struct memranges *memmap = &context.memmap; |
| |
| /* For FSP-M XIP we leave alloc NULL to get a direct mapping to flash. */ |
| if (!CONFIG(FSP_M_XIP)) |
| fspld.alloc = fspm_allocator; |
| |
| elog_boot_notify(s3wake); |
| |
| /* Build up memory map of romstage address space including CAR. */ |
| memranges_init_empty(memmap, &prog_ranges[0], ARRAY_SIZE(prog_ranges)); |
| if (ENV_CACHE_AS_RAM) |
| memranges_insert(memmap, (uintptr_t)_car_region_start, |
| _car_unallocated_start - _car_region_start, 0); |
| memranges_insert(memmap, (uintptr_t)_program, REGION_SIZE(program), 0); |
| |
| timestamp_add_now(TS_FSP_MEMORY_INIT_LOAD); |
| if (fsp_load_component(&fspld, hdr) != CB_SUCCESS) |
| die("FSPM not available or failed to load!\n"); |
| |
| if (CONFIG(FSP_M_XIP) && (uintptr_t)prog_start(&fspld.fsp_prog) != hdr->image_base) |
| die("FSPM XIP base does not match: %p vs %p\n", |
| (void *)(uintptr_t)hdr->image_base, prog_start(&fspld.fsp_prog)); |
| |
| timestamp_add_now(TS_INITRAM_START); |
| |
| do_fsp_memory_init(&context, s3wake); |
| |
| timestamp_add_now(TS_INITRAM_END); |
| } |