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/*
* 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 <stdlib.h>
#include <console/console.h>
#include <arch/stages.h>
#include <cbfs.h>
#include <cbmem.h>
#include <ramstage_loader.h>
#include <romstage_handoff.h>
#include <timestamp.h>
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) {
print_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");
}
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