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/* Copyright (c) 2011 The Chromium OS Authors. All rights reserved.
* Use of this source code is governed by a BSD-style license that can be
* found in the LICENSE file.
*
* High-level firmware wrapper API - entry points for init, firmware selection
*/
#include "gbb_header.h"
#include "load_firmware_fw.h"
#include "utility.h"
#include "vboot_api.h"
#include "vboot_common.h"
#include "vboot_nvstorage.h"
VbError_t VbSelectFirmware(VbCommonParams* cparams,
VbSelectFirmwareParams* fparams) {
VbSharedDataHeader* shared = (VbSharedDataHeader*)cparams->shared_data_blob;
LoadFirmwareParams p;
VbNvContext vnc;
int rv;
/* Start timer */
shared->timer_vb_select_firmware_enter = VbExGetTimer();
/* If recovery is requested, go straight to recovery without checking the
* RW firmware. */
if (VBNV_RECOVERY_NOT_REQUESTED != shared->recovery_reason) {
VBDEBUG(("VbSelectFirmware() detected recovery request, reason=%d.\n",
(int)shared->recovery_reason));
shared->timer_vb_select_firmware_exit = VbExGetTimer();
fparams->selected_firmware = VB_SELECT_FIRMWARE_RECOVERY;
return VBERROR_SUCCESS;
}
/* Copy parameters from wrapper API structs to old struct */
p.gbb_data = cparams->gbb_data;
p.gbb_size = cparams->gbb_size;
p.shared_data_blob = cparams->shared_data_blob;
p.shared_data_size = cparams->shared_data_size;
p.nv_context = &vnc;
p.verification_block_0 = fparams->verification_block_A;
p.verification_block_1 = fparams->verification_block_B;
p.verification_size_0 = fparams->verification_size_A;
p.verification_size_1 = fparams->verification_size_B;
/* Load NV storage */
VbExNvStorageRead(vnc.raw);
vnc.raw_changed = 0;
/* Use vboot_context and caller_internal to link our params with
* LoadFirmware()'s params. */
// TODO: clean up LoadFirmware() to use common params?
p.caller_internal = (void*)cparams;
cparams->vboot_context = (void*)&p;
/* Chain to LoadFirmware() */
rv = LoadFirmware(&p);
/* Save NV storage, if necessary */
if (vnc.raw_changed)
VbExNvStorageWrite(vnc.raw);
/* Copy amount of used shared data back to the wrapper API struct */
cparams->shared_data_size = (uint32_t)p.shared_data_size;
/* Stop timer */
shared->timer_vb_select_firmware_exit = VbExGetTimer();
/* Translate return codes */
if (LOAD_FIRMWARE_SUCCESS == rv) {
if (shared->flags & VBSD_LF_USE_RO_NORMAL) {
/* Request the read-only normal/dev code path */
fparams->selected_firmware = VB_SELECT_FIRMWARE_READONLY;
} else if (0 == shared->firmware_index)
fparams->selected_firmware = VB_SELECT_FIRMWARE_A;
else
fparams->selected_firmware = VB_SELECT_FIRMWARE_B;
return VBERROR_SUCCESS;
} else if (LOAD_FIRMWARE_REBOOT == rv) {
/* Reboot in the same mode we just left; copy the recovery reason */
VbNvSetup(&vnc);
VbNvSet(&vnc, VBNV_RECOVERY_REQUEST, shared->recovery_reason);
VbNvTeardown(&vnc);
if (vnc.raw_changed)
VbExNvStorageWrite(vnc.raw);
return 1;
} else {
/* Other error */
return 1;
}
}
/* TODO: Move this inside vboot_firmware.c; for now this just translates to
* the original function call. */
void VbUpdateFirmwareBodyHash(VbCommonParams* cparams, uint8_t* data,
uint32_t size) {
LoadFirmwareParams* lfparams = (LoadFirmwareParams*)cparams->vboot_context;
UpdateFirmwareBodyHash(lfparams, data, size);
}
/* Translation layer from LoadFirmware()'s GetFirmwareBody() to the new
* wrapper API call.
*
* TODO: call directly from LoadFirmware() */
int GetFirmwareBody(LoadFirmwareParams* lfparams, uint64_t index) {
VbCommonParams* cparams = (VbCommonParams*)lfparams->caller_internal;
VbError_t rv;
rv = VbExHashFirmwareBody(cparams, (index ? VB_SELECT_FIRMWARE_B :
VB_SELECT_FIRMWARE_A));
return (VBERROR_SUCCESS == rv ? 0 : 1);
}
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