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/*
* This file is part of the coreboot project.
*
* Copyright (C) 2013 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 <arch/stages.h>
#include <stdint.h>
#include <stddef.h>
#include <cbfs.h>
#include <cbmem.h>
#include <console/console.h>
#include <console/vtxprintf.h>
#include <pc80/tpm.h>
#include <reset.h>
#include <ramstage_loader.h>
#include <romstage_handoff.h>
#include <rmodule.h>
#include <string.h>
#include <stdlib.h>
#include <timestamp.h>
#include "chromeos.h"
#include "fmap.h"
#include "vboot_context.h"
#include "vboot_handoff.h"
static void vboot_run_stub(struct vboot_context *context)
{
struct rmod_stage_load rmod_stage = {
.cbmem_id = 0xffffffff,
.name = CONFIG_CBFS_PREFIX "/vboot",
};
void (*entry)(struct vboot_context *context);
if (rmodule_stage_load_from_cbfs(&rmod_stage)) {
printk(BIOS_DEBUG, "Could not load vboot stub.\n");
goto out;
}
entry = rmod_stage.entry;
/* Call stub. */
entry(context);
out:
/* Tear down the region no longer needed. */
if (rmod_stage.cbmem_entry != NULL)
cbmem_entry_remove(rmod_stage.cbmem_entry);
}
/* Helper routines for the vboot stub. */
static void log_msg(const char *fmt, va_list args)
{
vtxprintf(console_tx_byte, fmt, args);
console_tx_flush();
}
static void fatal_error(void)
{
printk(BIOS_ERR, "vboot encountered fatal error. Resetting.\n");
hard_reset();
}
static void vboot_invoke_wrapper(struct vboot_handoff *vboot_handoff)
{
VbCommonParams cparams;
VbSelectFirmwareParams fparams;
struct vboot_context context;
uint32_t *iflags;
vboot_handoff->selected_firmware = VB_SELECT_FIRMWARE_READONLY;
memset(&cparams, 0, sizeof(cparams));
memset(&fparams, 0, sizeof(fparams));
memset(&context, 0, sizeof(context));
iflags = &vboot_handoff->init_params.flags;
if (get_developer_mode_switch())
*iflags |= VB_INIT_FLAG_DEV_SWITCH_ON;
if (get_recovery_mode_switch())
*iflags |= VB_INIT_FLAG_REC_BUTTON_PRESSED;
if (get_write_protect_state())
*iflags |= VB_INIT_FLAG_WP_ENABLED;
if (CONFIG_VIRTUAL_DEV_SWITCH)
*iflags |= VB_INIT_FLAG_VIRTUAL_DEV_SWITCH;
if (CONFIG_EC_SOFTWARE_SYNC) {
*iflags |= VB_INIT_FLAG_EC_SOFTWARE_SYNC;
*iflags |= VB_INIT_FLAG_VIRTUAL_REC_SWITCH;
}
context.handoff = vboot_handoff;
context.cparams = &cparams;
context.fparams = &fparams;
cparams.gbb_size = find_fmap_entry("GBB", &cparams.gbb_data);
cparams.shared_data_blob = &vboot_handoff->shared_data[0];
cparams.shared_data_size = VB_SHARED_DATA_MIN_SIZE;
cparams.caller_context = &context;
fparams.verification_size_A =
find_fmap_entry("VBLOCK_A", &fparams.verification_block_A);
fparams.verification_size_B =
find_fmap_entry("VBLOCK_B", &fparams.verification_block_B);
context.fw_a_size =
find_fmap_entry("FW_MAIN_A", (void **)&context.fw_a);
context.fw_b_size =
find_fmap_entry("FW_MAIN_B", (void **)&context.fw_b);
/* Check all fmap entries. */
if (context.fw_a == NULL || context.fw_b == NULL ||
fparams.verification_block_A == NULL ||
fparams.verification_block_B == NULL ||
cparams.gbb_data == NULL) {
printk(BIOS_DEBUG, "Not all fmap entries found for vboot.\n");
return;
}
/* Initialize callbacks. */
context.read_vbnv = &read_vbnv;
context.save_vbnv = &save_vbnv;
context.tis_init = &tis_init;
context.tis_open = &tis_open;
context.tis_close = &tis_close;
context.tis_sendrecv = &tis_sendrecv;
context.log_msg = &log_msg;
context.fatal_error = &fatal_error;
vboot_run_stub(&context);
}
static void *vboot_load_ramstage(uint32_t cbmem_id, const char *name,
const struct cbmem_entry **cbmem_entry)
{
struct vboot_handoff *vboot_handoff;
struct cbfs_stage *stage;
const struct firmware_component *fwc;
struct rmod_stage_load rmod_load = {
.cbmem_id = cbmem_id,
.name = name,
};
timestamp_add_now(TS_START_VBOOT);
vboot_handoff = cbmem_add(CBMEM_ID_VBOOT_HANDOFF,
sizeof(*vboot_handoff));
if (vboot_handoff == NULL) {
printk(BIOS_DEBUG, "Could not add vboot_handoff structure.\n");
return NULL;
}
memset(vboot_handoff, 0, sizeof(*vboot_handoff));
vboot_invoke_wrapper(vboot_handoff);
timestamp_add_now(TS_END_VBOOT);
/* Take RO firmware path since no RW area was selected. */
if (vboot_handoff->selected_firmware != VB_SELECT_FIRMWARE_A &&
vboot_handoff->selected_firmware != VB_SELECT_FIRMWARE_B) {
printk(BIOS_DEBUG, "No RW firmware selected: 0x%08x\n",
vboot_handoff->selected_firmware);
return NULL;
}
if (CONFIG_VBOOT_RAMSTAGE_INDEX >= MAX_PARSED_FW_COMPONENTS) {
printk(BIOS_ERR, "Invalid ramstage index: %d\n",
CONFIG_VBOOT_RAMSTAGE_INDEX);
return NULL;
}
/* Check for invalid address. */
fwc = &vboot_handoff->components[CONFIG_VBOOT_RAMSTAGE_INDEX];
if (fwc->address == 0) {
printk(BIOS_DEBUG, "RW ramstage image address invalid.\n");
return NULL;
}
printk(BIOS_DEBUG, "RW ramstage image at 0x%08x, 0x%08x bytes.\n",
fwc->address, fwc->size);
stage = (void *)fwc->address;
if (rmodule_stage_load(&rmod_load, stage)) {
vboot_handoff->selected_firmware = VB_SELECT_FIRMWARE_READONLY;
printk(BIOS_DEBUG, "Could not load ramstage region.\n");
return NULL;
}
*cbmem_entry = rmod_load.cbmem_entry;
return rmod_load.entry;
}
const struct ramstage_loader_ops vboot_ramstage_loader = {
.name = "VBOOT",
.load = vboot_load_ramstage,
};
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