diff options
Diffstat (limited to 'firmware/lib/include/vboot_kernel.h')
| -rw-r--r-- | firmware/lib/include/vboot_kernel.h | 34 |
1 files changed, 34 insertions, 0 deletions
diff --git a/firmware/lib/include/vboot_kernel.h b/firmware/lib/include/vboot_kernel.h index c3c4585b..15c27101 100644 --- a/firmware/lib/include/vboot_kernel.h +++ b/firmware/lib/include/vboot_kernel.h @@ -88,4 +88,38 @@ uint32_t vb2_get_fwmp_flags(void); */ void vb2_nv_commit(struct vb2_context *ctx); +/** + * Prepare to start a bootloader + * + * Get ready to jump into a bootloader if allowed, calling RollbackKernelLock(). + * + * @param allowed 1 if allowed, 0 if not allowed (in which case this function + * prints a debug error) + * @return 0 if allowed, -1 if not allowed + * + */ +int vb2_prepare_alt_fw(int allowed); + +/** + * Tidy up after failing to start a bootloader + * + * This beeps twice to indicate failure + */ +void vb2_exit_altfw(void); + +/** + * Jump to a bootloader if possible + * + * This calls vb2_prepare_alt_fw() to check the operation is permitted. If it + * is, then it jumps to the selected bootloader and execution continues there, + * never returning. + * + * If the operation is not permitted, or it is permitted but the bootloader + * cannot be found, it calls vb2_exit_altfw() and returns. + * + * @allowed 1 if allowed, 0 if not allowed + * @altfw_num Number of bootloader to start (0=any, 1=first, etc.) + */ +void vb2_try_alt_fw(int allowed, int altfw_num); + #endif /* VBOOT_REFERENCE_VBOOT_KERNEL_H_ */ |