src/vboot/vboot_common.c

   1 /*
   2  * This file is part of the coreboot project.
   3  *
   4  * Copyright (C) 2014 The ChromiumOS Authors.  All rights reserved.
   5  *
   6  * This program is free software; you can redistribute it and/or modify
   7  * it under the terms of the GNU General Public License as published by
   8  * the Free Software Foundation; version 2 of the License.
   9  *
  10  * This program is distributed in the hope that it will be useful,
  11  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  12  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  13  * GNU General Public License for more details.
  14  */
  15
  16 #include <boot/coreboot_tables.h>
  17 #include <boot_device.h>
  18 #include <cbmem.h>
  19 #include <console/cbmem_console.h>
  20 #include <console/console.h>
  21 #include <fmap.h>
  22 #include <reset.h>
  23 #include <rules.h>
  24 #include <stddef.h>
  25 #include <string.h>
  26 #include <vboot/vboot_common.h>
  27
  28 int vboot_named_region_device(const char *name, struct region_device *rdev)
  29 {
  30         return fmap_locate_area_as_rdev(name, rdev);
  31 }
  32
  33 int vboot_named_region_device_rw(const char *name, struct region_device *rdev)
  34 {
  35         return fmap_locate_area_as_rdev_rw(name, rdev);
  36 }
  37
  38 /* ========================== VBOOT HANDOFF APIs =========================== */
  39 int vboot_get_handoff_info(void **addr, uint32_t *size)
  40 {
  41         /*
  42          * vboot_handoff is present only after cbmem comes online. If we are in
  43          * pre-ram stage, then bail out early.
  44          */
  45         if (ENV_BOOTBLOCK ||
  46             (ENV_VERSTAGE && IS_ENABLED(CONFIG_VBOOT_STARTS_IN_BOOTBLOCK)))
  47                 return -1;
  48
  49         struct vboot_handoff *vboot_handoff;
  50         vboot_handoff = cbmem_find(CBMEM_ID_VBOOT_HANDOFF);
  51
  52         if (vboot_handoff == NULL)
  53                 return -1;
  54
  55         *addr = vboot_handoff;
  56
  57         if (size)
  58                 *size = sizeof(*vboot_handoff);
  59         return 0;
  60 }
  61
  62 static int vboot_get_handoff_flag(uint32_t flag)
  63 {
  64         struct vboot_handoff *vbho;
  65
  66         /*
  67          * If vboot_handoff cannot be found, return default value of flag as 0.
  68          */
  69         if (vboot_get_handoff_info((void **)&vbho, NULL))
  70                 return 0;
  71
  72         return !!(vbho->init_params.out_flags & flag);
  73 }
  74
  75 int vboot_handoff_skip_display_init(void)
  76 {
  77         return !vboot_get_handoff_flag(VB_INIT_OUT_ENABLE_DISPLAY);
  78 }
  79
  80 int vboot_handoff_check_developer_flag(void)
  81 {
  82         return vboot_get_handoff_flag(VB_INIT_OUT_ENABLE_DEVELOPER);
  83 }
  84
  85 int vboot_handoff_check_recovery_flag(void)
  86 {
  87         return vboot_get_handoff_flag(VB_INIT_OUT_ENABLE_RECOVERY);
  88 }
  89
  90 int vboot_handoff_get_recovery_reason(void)
  91 {
  92         struct vboot_handoff *vbho;
  93         VbSharedDataHeader *sd;
  94
  95         if (vboot_get_handoff_info((void **)&vbho, NULL))
  96                 return 0;
  97
  98         sd = (VbSharedDataHeader *)vbho->shared_data;
  99
 100         return sd->recovery_reason;
 101 }
 102
 103 /* ============================ VBOOT REBOOT ============================== */
 104 void __attribute__((weak)) vboot_platform_prepare_reboot(void)
 105 {
 106 }
 107
 108 void vboot_reboot(void)
 109 {
 110         if (IS_ENABLED(CONFIG_CONSOLE_CBMEM_DUMP_TO_UART))
 111                 cbmem_dump_console();
 112         vboot_platform_prepare_reboot();
 113         hard_reset();
 114         die("failed to reboot");
 115 }