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/*
* This file is part of the coreboot project.
*
* Copyright (C) 2011 The ChromiumOS Authors. All rights reserved.
*
* 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 <stddef.h>
#include "chromeos.h"
#if CONFIG_VBOOT_VERIFY_FIRMWARE
#include "vboot_handoff.h"
#endif
#include <boot/coreboot_tables.h>
#include <cbmem.h>
#include <console/console.h>
#if CONFIG_VBOOT_VERIFY_FIRMWARE
static int vboot_enable_developer(void)
{
struct vboot_handoff *vbho;
vbho = cbmem_find(CBMEM_ID_VBOOT_HANDOFF);
if (vbho == NULL) {
printk(BIOS_ERR, "%s: Couldn't find vboot_handoff structure!\n",
__func__);
return 0;
}
return !!(vbho->init_params.out_flags & VB_INIT_OUT_ENABLE_DEVELOPER);
}
static int vboot_enable_recovery(void)
{
struct vboot_handoff *vbho;
vbho = cbmem_find(CBMEM_ID_VBOOT_HANDOFF);
if (vbho == NULL)
return 0;
return !!(vbho->init_params.out_flags & VB_INIT_OUT_ENABLE_RECOVERY);
}
#else
static inline int vboot_enable_developer(void) { return 0; }
static inline int vboot_enable_recovery(void) { return 0; }
#endif
int developer_mode_enabled(void)
{
return get_developer_mode_switch() || vboot_enable_developer();
}
int recovery_mode_enabled(void)
{
/*
* This is called in multiple places and has to detect
* recovery mode triggered from the EC and via shared
* recovery reason set with crossystem.
*
* If shared recovery reason is set:
* - before VbInit then get_recovery_mode_from_vbnv() is true
* - after VbInit then vboot_enable_recovery() is true
*
* Otherwise the mainboard handler for get_recovery_mode_switch()
* will detect recovery mode initiated by the EC.
*/
return get_recovery_mode_switch() || get_recovery_mode_from_vbnv() ||
vboot_enable_recovery();
}
#if CONFIG_VBOOT_VERIFY_FIRMWARE
#include <payload_loader.h>
static void *vboot_get_payload(size_t *len)
{
struct vboot_handoff *vboot_handoff;
struct firmware_component *fwc;
vboot_handoff = cbmem_find(CBMEM_ID_VBOOT_HANDOFF);
if (vboot_handoff == NULL)
return NULL;
if (CONFIG_VBOOT_BOOT_LOADER_INDEX >= MAX_PARSED_FW_COMPONENTS) {
printk(BIOS_ERR, "Invalid boot loader index: %d\n",
CONFIG_VBOOT_BOOT_LOADER_INDEX);
return NULL;
}
fwc = &vboot_handoff->components[CONFIG_VBOOT_BOOT_LOADER_INDEX];
if (len != NULL)
*len = fwc->size;
printk(BIOS_DEBUG, "Booting 0x%x byte payload at 0x%08x.\n",
fwc->size, fwc->address);
return (void *)fwc->address;
}
static int vboot_locate_payload(struct payload *payload)
{
void *buffer;
size_t size;
buffer = vboot_get_payload(&size);
if (buffer == NULL)
return -1;
payload->backing_store.data = buffer;
payload->backing_store.size = size;
return 0;
}
const struct payload_loader_ops vboot_payload_loader = {
.name = "VBOOT",
.locate = vboot_locate_payload,
};
int vboot_get_handoff_info(void **addr, uint32_t *size)
{
struct vboot_handoff *vboot_handoff;
vboot_handoff = cbmem_find(CBMEM_ID_VBOOT_HANDOFF);
if (vboot_handoff == NULL)
return -1;
*addr = vboot_handoff;
*size = sizeof(*vboot_handoff);
return 0;
}
#endif
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