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/*
* This file is part of the coreboot project.
*
* Copyright (C) 2014 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.
*/
#include <boot/coreboot_tables.h>
#include <boot_device.h>
#include <cbmem.h>
#include <console/cbmem_console.h>
#include <fmap.h>
#include <reset.h>
#include <stddef.h>
#include <security/vboot/gbb.h>
#include <security/vboot/vboot_common.h>
#include <security/vboot/vbnv.h>
#include <vb2_api.h>
int vboot_named_region_device(const char *name, struct region_device *rdev)
{
return fmap_locate_area_as_rdev(name, rdev);
}
int vboot_named_region_device_rw(const char *name, struct region_device *rdev)
{
return fmap_locate_area_as_rdev_rw(name, rdev);
}
/* Check if it is okay to enable USB Device Controller (UDC). */
int vboot_can_enable_udc(void)
{
/* Always disable if not in developer mode */
if (!vboot_developer_mode_enabled())
return 0;
/* Enable if GBB flag is set */
if (gbb_is_flag_set(VB2_GBB_FLAG_ENABLE_UDC))
return 1;
/* Enable if VBNV flag is set */
if (vbnv_udc_enable_flag())
return 1;
/* Otherwise disable */
return 0;
}
/* ========================== VBOOT HANDOFF APIs =========================== */
int vboot_get_handoff_info(void **addr, uint32_t *size)
{
/*
* vboot_handoff is present only after cbmem comes online. If we are in
* pre-ram stage, then bail out early.
*/
if (ENV_BOOTBLOCK ||
(ENV_VERSTAGE && CONFIG(VBOOT_STARTS_IN_BOOTBLOCK)))
return -1;
struct vboot_handoff *vboot_handoff;
vboot_handoff = cbmem_find(CBMEM_ID_VBOOT_HANDOFF);
if (vboot_handoff == NULL)
return -1;
*addr = vboot_handoff;
if (size)
*size = sizeof(*vboot_handoff);
return 0;
}
static int vboot_get_handoff_flag(uint32_t flag)
{
struct vboot_handoff *vbho;
/*
* If vboot_handoff cannot be found, return default value of flag as 0.
*/
if (vboot_get_handoff_info((void **)&vbho, NULL))
return 0;
return !!(vbho->out_flags & flag);
}
int vboot_handoff_check_recovery_flag(void)
{
return vboot_get_handoff_flag(VB_INIT_OUT_ENABLE_RECOVERY);
}
int vboot_handoff_get_recovery_reason(void)
{
struct vboot_handoff *vbho;
VbSharedDataHeader *sd;
if (vboot_get_handoff_info((void **)&vbho, NULL))
return 0;
sd = (VbSharedDataHeader *)vbho->shared_data;
return sd->recovery_reason;
}
/* ============================ VBOOT REBOOT ============================== */
void __weak vboot_platform_prepare_reboot(void)
{
}
void vboot_reboot(void)
{
if (CONFIG(CONSOLE_CBMEM_DUMP_TO_UART))
cbmem_dump_console();
vboot_platform_prepare_reboot();
board_reset();
}
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