/* SPDX-License-Identifier: GPL-2.0-only */ #include <stdlib.h> #include <cbfs.h> #include <cbmem.h> #include <console/console.h> #include <fallback.h> #include <halt.h> #include <lib.h> #include <program_loading.h> #include <reset.h> #include <rmodule.h> #include <stage_cache.h> #include <symbols.h> #include <timestamp.h> #include <fit_payload.h> #include <security/vboot/vboot_common.h> /* Only can represent up to 1 byte less than size_t. */ const struct mem_region_device addrspace_32bit = MEM_REGION_DEV_RO_INIT(0, ~0UL); int prog_locate(struct prog *prog) { struct cbfsf file; if (prog_locate_hook(prog)) return -1; if (cbfs_boot_locate(&file, prog_name(prog), NULL)) return -1; cbfsf_file_type(&file, &prog->cbfs_type); cbfs_file_data(prog_rdev(prog), &file); return 0; } void run_romstage(void) { struct prog romstage = PROG_INIT(PROG_ROMSTAGE, CONFIG_CBFS_PREFIX "/romstage"); vboot_run_logic(); if (ENV_X86 && CONFIG(BOOTBLOCK_NORMAL)) { if (legacy_romstage_selector(&romstage)) goto fail; } else { if (prog_locate(&romstage)) goto fail; } timestamp_add_now(TS_START_COPYROM); if (cbfs_prog_stage_load(&romstage)) goto fail; timestamp_add_now(TS_END_COPYROM); console_time_report(); prog_run(&romstage); fail: if (CONFIG(BOOTBLOCK_CONSOLE)) die_with_post_code(POST_INVALID_ROM, "Couldn't load romstage.\n"); halt(); } int __weak prog_locate_hook(struct prog *prog) { return 0; } static void run_ramstage_from_resume(struct prog *ramstage) { /* Load the cached ramstage to runtime location. */ stage_cache_load_stage(STAGE_RAMSTAGE, ramstage); prog_set_arg(ramstage, cbmem_top()); if (prog_entry(ramstage) != NULL) { printk(BIOS_DEBUG, "Jumping to image.\n"); prog_run(ramstage); } printk(BIOS_ERR, "ramstage cache invalid.\n"); board_reset(); } static int load_relocatable_ramstage(struct prog *ramstage) { struct rmod_stage_load rmod_ram = { .cbmem_id = CBMEM_ID_RAMSTAGE, .prog = ramstage, }; return rmodule_stage_load(&rmod_ram); } void run_ramstage(void) { struct prog ramstage = PROG_INIT(PROG_RAMSTAGE, CONFIG_CBFS_PREFIX "/ramstage"); if (ENV_POSTCAR) timestamp_add_now(TS_END_POSTCAR); /* Call "end of romstage" here if postcar stage doesn't exist */ if (ENV_ROMSTAGE) timestamp_add_now(TS_END_ROMSTAGE); /* * Only x86 systems using ramstage stage cache currently take the same * firmware path on resume. */ if (ENV_X86 && resume_from_stage_cache()) run_ramstage_from_resume(&ramstage); vboot_run_logic(); if (prog_locate(&ramstage)) goto fail; timestamp_add_now(TS_START_COPYRAM); if (ENV_X86) { if (load_relocatable_ramstage(&ramstage)) goto fail; } else { if (cbfs_prog_stage_load(&ramstage)) goto fail; } stage_cache_add(STAGE_RAMSTAGE, &ramstage); timestamp_add_now(TS_END_COPYRAM); console_time_report(); /* This overrides the arg fetched from the relocatable module */ prog_set_arg(&ramstage, cbmem_top()); prog_run(&ramstage); fail: die_with_post_code(POST_INVALID_ROM, "Ramstage was not loaded!\n"); } #if ENV_PAYLOAD_LOADER // gc-sections should take care of this static struct prog global_payload = PROG_INIT(PROG_PAYLOAD, CONFIG_CBFS_PREFIX "/payload"); void payload_load(void) { struct prog *payload = &global_payload; timestamp_add_now(TS_LOAD_PAYLOAD); if (prog_locate(payload)) goto out; switch (prog_cbfs_type(payload)) { case CBFS_TYPE_SELF: /* Simple ELF */ selfload_check(payload, BM_MEM_RAM); break; case CBFS_TYPE_FIT: /* Flattened image tree */ if (CONFIG(PAYLOAD_FIT_SUPPORT)) { fit_payload(payload); break; } /* else fall-through */ default: die_with_post_code(POST_INVALID_ROM, "Unsupported payload type.\n"); break; } out: if (prog_entry(payload) == NULL) die_with_post_code(POST_INVALID_ROM, "Payload not loaded.\n"); } void payload_run(void) { struct prog *payload = &global_payload; /* Reset to booting from this image as late as possible */ boot_successful(); printk(BIOS_DEBUG, "Jumping to boot code at %p(%p)\n", prog_entry(payload), prog_entry_arg(payload)); post_code(POST_ENTER_ELF_BOOT); timestamp_add_now(TS_SELFBOOT_JUMP); /* Before we go off to run the payload, see if * we stayed within our bounds. */ checkstack(_estack, 0); prog_run(payload); } #endif