/* * This file is part of the coreboot project. * * Copyright (C) 2014 Google Inc. * * This program is free software; you can redistribute it and/or modify * it under the terms of the GNU General Public License as published by * the Free Software Foundation; version 2 of the License. * * This program is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the * GNU General Public License for more details. * * You should have received a copy of the GNU General Public License * along with this program; if not, write to the Free Software * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA */ #include #include #include #include #include #include #include #include extern const struct ramstage_loader_ops cbfs_ramstage_loader; extern const struct ramstage_loader_ops vboot_ramstage_loader; static const struct ramstage_loader_ops *loaders[] = { #if CONFIG_VBOOT_VERIFY_FIRMWARE &vboot_ramstage_loader, #endif &cbfs_ramstage_loader, }; static const char *ramstage_name = CONFIG_CBFS_PREFIX "/ramstage"; static const uint32_t ramstage_id = CBMEM_ID_RAMSTAGE; static void load_ramstage(const struct ramstage_loader_ops *ops, struct romstage_handoff *handoff) { const struct cbmem_entry *cbmem_entry; void *entry_point; timestamp_add_now(TS_START_COPYRAM); entry_point = ops->load(ramstage_id, ramstage_name, &cbmem_entry); if (entry_point == NULL) return; cache_loaded_ramstage(handoff, cbmem_entry, entry_point); timestamp_add_now(TS_END_COPYRAM); stage_exit(entry_point); } static void run_ramstage_from_resume(struct romstage_handoff *handoff) { void *entry; const struct cbmem_entry *cbmem_entry; if (handoff != NULL && handoff->s3_resume) { cbmem_entry = cbmem_entry_find(ramstage_id); /* No place to load ramstage. */ if (cbmem_entry == NULL) return; /* Load the cached ramstage to runtime location. */ entry = load_cached_ramstage(handoff, cbmem_entry); if (entry != NULL) { printk(BIOS_DEBUG, "Jumping to image.\n"); stage_exit(entry); } } } void run_ramstage(void) { struct romstage_handoff *handoff; const struct ramstage_loader_ops *ops; int i; handoff = romstage_handoff_find_or_add(); run_ramstage_from_resume(handoff); for (i = 0; i < ARRAY_SIZE(loaders); i++) { ops = loaders[i]; printk(BIOS_DEBUG, "Trying %s ramstage loader.\n", ops->name); load_ramstage(ops, handoff); } die("Ramstage was not loaded!\n"); }