| /* SPDX-License-Identifier: GPL-2.0-only */ |
| |
| #include <assert.h> |
| #include <bootmode.h> |
| #include <bootstate.h> |
| #include <vb2_api.h> |
| #include <security/vboot/misc.h> |
| #include <security/vboot/vbnv.h> |
| #include <security/vboot/vboot_common.h> |
| |
| /* |
| * Functions which check vboot information should only be called after verstage |
| * has run. Otherwise, they will hit the assertion in vboot_get_context(). |
| */ |
| |
| int vboot_check_recovery_request(void) |
| { |
| return vb2api_get_recovery_reason(vboot_get_context()); |
| } |
| |
| int vboot_recovery_mode_enabled(void) |
| { |
| return vboot_get_context()->flags & VB2_CONTEXT_RECOVERY_MODE; |
| } |
| |
| int vboot_developer_mode_enabled(void) |
| { |
| return vboot_get_context()->flags & VB2_CONTEXT_DEVELOPER_MODE; |
| } |
| |
| int __weak clear_recovery_mode_switch(void) |
| { |
| return 0; |
| } |
| |
| static void do_clear_recovery_mode_switch(void *unused) |
| { |
| if (vboot_get_context()->flags & VB2_CONTEXT_FORCE_RECOVERY_MODE) |
| clear_recovery_mode_switch(); |
| } |
| /* |
| * The recovery mode switch (typically backed by EC) is not cleared until |
| * BS_WRITE_TABLES for two reasons: |
| * |
| * (1) On some platforms, FSP initialization may cause a reboot. Push clearing |
| * the recovery mode switch until after FSP code runs, so that a manual recovery |
| * request (three-finger salute) will function correctly under this condition. |
| * |
| * (2) To give the implementation of clear_recovery_mode_switch a chance to |
| * add an event to elog. See the function in chromeec/switches.c. |
| */ |
| BOOT_STATE_INIT_ENTRY(BS_WRITE_TABLES, BS_ON_ENTRY, |
| do_clear_recovery_mode_switch, NULL); |
| |
| int __weak get_recovery_mode_retrain_switch(void) |
| { |
| return 0; |
| } |
| |
| int __weak get_ec_is_trusted(void) |
| { |
| /* |
| * If board doesn't override this, by default we always assume EC is in |
| * RW and untrusted. However, newer platforms with Google TPM are supposed |
| * to use GSC BOOT_MODE to report this and won't need to override this |
| * anymore. |
| */ |
| return 0; |
| } |
| |
| #if CONFIG(VBOOT_NO_BOARD_SUPPORT) |
| /** |
| * TODO: Create flash protection interface which implements get_write_protect_state. |
| * get_recovery_mode_switch should be implemented as default function. |
| */ |
| int __weak get_write_protect_state(void) |
| { |
| return 0; |
| } |
| |
| int __weak get_recovery_mode_switch(void) |
| { |
| return 0; |
| } |
| |
| void __weak fill_lb_gpios(struct lb_gpios *gpios) |
| { |
| } |
| |
| #endif |