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https://github.com/Telecominfraproject/OpenCellular.git
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f78d505e04
Chromebox ECs perform EFS: verifying firmware before the AP boots. This patch adds support for EC EFS. EC EFS uses two slots: one is active slot and one is used for update. AP is agnostic about which slot is active and which slot is for update. Instead, AP recognizes one slot as 'active' and the other as 'update' (or non active) slot. After update is successful, AP issues a cold reboot command to activate the new slot. BUG=b:65028930,b:65264494 BRANCH=none CQ-DEPEND=CL:616248 TEST=buildall. On Fizz, verify: 1. RW_B is old and updated by soft sync. RW_B is activated and executed after reboot. System continues to boot to OS. 2. RW_A is old and updated by soft sync. RW_A is activated and executed after reboot. System continues to boot to OS. Change-Id: I6ca7686eb28b0b548785cf2c02eca1b67018f469 Signed-off-by: Daisuke Nojiri <dnojiri@chromium.org> Reviewed-on: https://chromium-review.googlesource.com/616346
98 lines
2.7 KiB
C
98 lines
2.7 KiB
C
/* Copyright (c) 2013 The Chromium OS Authors. All rights reserved.
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* Use of this source code is governed by a BSD-style license that can be
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* found in the LICENSE file.
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*
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* EC software sync routines for vboot
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*/
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#include "2sysincludes.h"
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#include "2common.h"
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#include "2misc.h"
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#include "2nvstorage.h"
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#include "sysincludes.h"
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#include "ec_sync.h"
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#include "vboot_api.h"
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#include "vboot_common.h"
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#include "vboot_display.h"
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#include "vboot_kernel.h"
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VbError_t ec_sync_all(struct vb2_context *ctx, struct VbCommonParams *cparams)
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{
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VbSharedDataHeader *shared =
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(VbSharedDataHeader *)cparams->shared_data_blob;
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VbAuxFwUpdateSeverity_t fw_update;
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VbError_t rv;
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rv = ec_sync_check_aux_fw(ctx, cparams, &fw_update);
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if (rv)
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return rv;
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/* Phase 1; this determines if we need an update */
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VbError_t phase1_rv = ec_sync_phase1(ctx, cparams);
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int need_wait_screen = ec_will_update_slowly(ctx, cparams) ||
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(fw_update == VB_AUX_FW_SLOW_UPDATE);
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/*
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* Check if we need to reboot to load the VGA Option ROM before we can
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* display the WAIT screen.
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*
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* Do this before we check if ec_sync_phase1() requires a reboot for
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* some other reason, since there's no reason to reboot twice.
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*/
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int reboot_for_oprom = (need_wait_screen &&
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shared->flags & VBSD_OPROM_MATTERS &&
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!(shared->flags & VBSD_OPROM_LOADED));
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if (reboot_for_oprom) {
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VB2_DEBUG("Reboot to load VGA Option ROM\n");
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vb2_nv_set(ctx, VB2_NV_OPROM_NEEDED, 1);
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}
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/* Reboot if phase 1 needed it, or if we need to load VGA Option ROM */
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if (phase1_rv)
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return VBERROR_EC_REBOOT_TO_RO_REQUIRED;
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if (reboot_for_oprom)
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return VBERROR_VGA_OPROM_MISMATCH;
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/* Display the wait screen if we need it */
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if (need_wait_screen) {
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VB2_DEBUG("EC is slow. Show WAIT screen.\n");
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VbDisplayScreen(ctx, cparams, VB_SCREEN_WAIT, 0);
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}
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/* Phase 2; Applies update and/or jumps to the correct EC image */
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rv = ec_sync_phase2(ctx, cparams);
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if (rv)
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return rv;
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/*
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* Do software sync for devices tunneled through the EC.
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*/
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rv = VbExUpdateAuxFw();
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if (rv)
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return rv;
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/*
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* Reboot to unload VGA Option ROM if:
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* - we displayed the wait screen
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* - the system has slow EC update flag set
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* - the VGA Option ROM was needed and loaded
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* - the system is NOT in developer mode (that'll also need the ROM)
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*/
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if (need_wait_screen &&
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(shared->flags & VBSD_OPROM_MATTERS) &&
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(shared->flags & VBSD_OPROM_LOADED) &&
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!(shared->flags & VBSD_BOOT_DEV_SWITCH_ON)) {
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VB2_DEBUG("Reboot to unload VGA Option ROM\n");
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vb2_nv_set(ctx, VB2_NV_OPROM_NEEDED, 0);
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return VBERROR_VGA_OPROM_MISMATCH;
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}
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/* Phase 3; Completes sync and handles battery cutoff */
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rv = ec_sync_phase3(ctx, cparams);
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if (rv)
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return rv;
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return VBERROR_SUCCESS;
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}
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