1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
|
/* Copyright (c) 2013 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.
*
* EC software sync routines for vboot
*/
#include "2sysincludes.h"
#include "2common.h"
#include "2misc.h"
#include "2nvstorage.h"
#include "sysincludes.h"
#include "ec_sync.h"
#include "vboot_api.h"
#include "vboot_common.h"
#include "vboot_display.h"
#include "vboot_kernel.h"
static VbError_t ec_sync_unload_oprom(struct vb2_context *ctx,
VbSharedDataHeader *shared,
int need_wait_screen)
{
/*
* Reboot to unload VGA Option ROM if:
* - we displayed the wait screen
* - the system has slow EC update flag set
* - the VGA Option ROM was needed and loaded
* - the system is NOT in developer mode (that'll also need the ROM)
*/
if (need_wait_screen &&
(shared->flags & VBSD_OPROM_MATTERS) &&
(shared->flags & VBSD_OPROM_LOADED) &&
!(shared->flags & VBSD_BOOT_DEV_SWITCH_ON)) {
VB2_DEBUG("Reboot to unload VGA Option ROM\n");
vb2_nv_set(ctx, VB2_NV_OPROM_NEEDED, 0);
return VBERROR_VGA_OPROM_MISMATCH;
}
return VBERROR_SUCCESS;
}
VbError_t ec_sync_all(struct vb2_context *ctx)
{
struct vb2_shared_data *sd = vb2_get_sd(ctx);
VbSharedDataHeader *shared = sd->vbsd;
VbAuxFwUpdateSeverity_t fw_update;
VbError_t rv;
rv = ec_sync_check_aux_fw(ctx, &fw_update);
if (rv)
return rv;
/* Phase 1; this determines if we need an update */
VbError_t phase1_rv = ec_sync_phase1(ctx);
int need_wait_screen = ec_will_update_slowly(ctx) ||
(fw_update == VB_AUX_FW_SLOW_UPDATE);
/*
* Check if we need to reboot to load the VGA Option ROM before we can
* display the WAIT screen.
*
* Do this before we check if ec_sync_phase1() requires a reboot for
* some other reason, since there's no reason to reboot twice.
*/
int reboot_for_oprom = (need_wait_screen &&
shared->flags & VBSD_OPROM_MATTERS &&
!(shared->flags & VBSD_OPROM_LOADED));
if (reboot_for_oprom) {
VB2_DEBUG("Reboot to load VGA Option ROM\n");
vb2_nv_set(ctx, VB2_NV_OPROM_NEEDED, 1);
}
/* Reboot if phase 1 needed it, or if we need to load VGA Option ROM */
if (phase1_rv)
return VBERROR_EC_REBOOT_TO_RO_REQUIRED;
if (reboot_for_oprom)
return VBERROR_VGA_OPROM_MISMATCH;
/* Display the wait screen if we need it */
if (need_wait_screen) {
VB2_DEBUG("EC is slow. Show WAIT screen.\n");
VbDisplayScreen(ctx, VB_SCREEN_WAIT, 0, NULL);
}
/* Phase 2; Applies update and/or jumps to the correct EC image */
rv = ec_sync_phase2(ctx);
if (rv)
return rv;
/*
* Do Aux FW software sync and protect devices tunneled through the EC.
* Aux FW update may request RO reboot to force EC cold reset so also
* unload the option ROM if needed to prevent a second reboot.
*/
rv = ec_sync_update_aux_fw(ctx);
if (rv) {
ec_sync_unload_oprom(ctx, shared, need_wait_screen);
return rv;
}
/* Reboot to unload VGA Option ROM if needed */
rv = ec_sync_unload_oprom(ctx, shared, need_wait_screen);
if (rv)
return rv;
/* Phase 3; Completes sync and handles battery cutoff */
rv = ec_sync_phase3(ctx);
if (rv)
return rv;
return VBERROR_SUCCESS;
}
|
