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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 <stdint.h>
#include <stdlib.h>
#include <cbmem.h>
#include <console/console.h>
#include <fallback.h>
#include <lib.h>
#include <program_loading.h>
#include <symbols.h>
#include <timestamp.h>
extern const struct prog_loader_ops vboot_loader;
extern const struct prog_loader_ops cbfs_payload_loader;
static const struct prog_loader_ops *payload_ops[] = {
#if CONFIG_VBOOT_VERIFY_FIRMWARE
&vboot_loader,
#endif
&cbfs_payload_loader,
};
static struct prog global_payload = {
.name = CONFIG_CBFS_PREFIX "/payload",
.type = PROG_PAYLOAD,
};
void __attribute__((weak)) mirror_payload(struct prog *payload)
{
return;
}
void payload_load(void)
{
int i;
const struct prog_loader_ops *ops;
struct prog *payload = &global_payload;
for (i = 0; i < ARRAY_SIZE(payload_ops); i++) {
/* Default loader state is active. */
int ret = 1;
ops = payload_ops[i];
if (ops->is_loader_active != NULL)
ret = ops->is_loader_active(payload);
if (ret == 0) {
printk(BIOS_DEBUG, "%s payload loader inactive.\n",
ops->name);
continue;
} else if (ret < 0) {
printk(BIOS_DEBUG, "%s payload loader failure.\n",
ops->name);
continue;
}
if (ops->prepare(payload) < 0) {
printk(BIOS_DEBUG, "%s: could not locate payload.\n",
ops->name);
continue;
}
printk(BIOS_DEBUG, "%s: located payload @ %p, %zu bytes.\n",
ops->name, prog_start(payload), prog_size(payload));
break;
}
if (i == ARRAY_SIZE(payload_ops))
goto out;
mirror_payload(payload);
/* Pass cbtables to payload if architecture desires it. */
prog_set_entry(payload, selfload(payload),
cbmem_find(CBMEM_ID_CBTABLE));
out:
if (prog_entry(payload) == NULL)
die("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);
}
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