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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.
*/
#include <stdlib.h>
#include <console/console.h>
#include <arch/stages.h>
#include <cbfs.h>
#include <program_loading.h>
#include <romstage_handoff.h>
#include <stage_cache.h>
#include <timestamp.h>
extern const struct prog_loader_ops cbfs_ramstage_loader;
extern const struct prog_loader_ops vboot_loader;
static const struct prog_loader_ops *loaders[] = {
#if CONFIG_VBOOT_VERIFY_FIRMWARE
&vboot_loader,
#endif
&cbfs_ramstage_loader,
};
void __attribute__((weak)) stage_cache_add(int stage_id, struct prog *stage) {}
void __attribute__((weak)) stage_cache_load_stage(int stage_id,
struct prog *stage) {}
void __attribute__((weak)) ramstage_cache_invalid(void) {}
static void load_ramstage(const struct prog_loader_ops *ops,
struct prog *ramstage)
{
timestamp_add_now(TS_START_COPYRAM);
if (ops->prepare(ramstage))
return;
stage_cache_add(STAGE_RAMSTAGE, ramstage);
timestamp_add_now(TS_END_COPYRAM);
prog_run(ramstage);
}
static void run_ramstage_from_resume(struct romstage_handoff *handoff,
struct prog *ramstage)
{
if (handoff != NULL && handoff->s3_resume) {
/* Load the cached ramstage to runtime location. */
stage_cache_load_stage(STAGE_RAMSTAGE, ramstage);
if (prog_entry(ramstage) != NULL) {
printk(BIOS_DEBUG, "Jumping to image.\n");
prog_run(ramstage);
}
ramstage_cache_invalid();
}
}
void run_ramstage(void)
{
const struct prog_loader_ops *ops;
int i;
struct prog ramstage = {
.name = CONFIG_CBFS_PREFIX "/ramstage",
.type = PROG_RAMSTAGE,
};
run_ramstage_from_resume(romstage_handoff_find_or_add(), &ramstage);
for (i = 0; i < ARRAY_SIZE(loaders); i++) {
/* Default loader state is active. */
int ret = 1;
ops = loaders[i];
if (ops->is_loader_active != NULL)
ret = ops->is_loader_active(&ramstage);
if (ret == 0) {
printk(BIOS_DEBUG, "%s ramstage loader inactive.\n",
ops->name);
continue;
} else if (ret < 0) {
printk(BIOS_DEBUG, "%s ramstage loader failure.\n",
ops->name);
continue;
}
printk(BIOS_DEBUG, "%s ramstage loader active.\n", ops->name);
load_ramstage(ops, &ramstage);
}
die("Ramstage was not loaded!\n");
}
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