diff options
Diffstat (limited to 'board/cr50/board.c')
| -rw-r--r-- | board/cr50/board.c | 21 |
1 files changed, 21 insertions, 0 deletions
diff --git a/board/cr50/board.c b/board/cr50/board.c index c967871c8e..1bb6ce46ec 100644 --- a/board/cr50/board.c +++ b/board/cr50/board.c @@ -450,6 +450,27 @@ int is_ec_rst_asserted(void) return GREAD(RBOX, ASSERT_EC_RST); } +void nvmem_wipe_or_reboot(void) +{ + /* + * Blindly zapping the TPM space while the AP is awake and poking at it + * will bork the TPM task and the AP itself, so force the whole system + * off by holding the EC in reset. + */ + assert_ec_rst(); + + /* + * If we can't clear the NVMEM or can't reset the TPM task, something + * is unexpectedly wrong. To be safe, let's reboot the Cr50 (which also + * reboots the EC and AP). + */ + if (nvmem_setup(0) != EC_SUCCESS || tpm_reset() != 1) + system_reset(SYSTEM_RESET_HARD); + + /* Wipe & reset is complete. Allow the EC and AP to reboot */ + deassert_ec_rst(); +} + void nvmem_compute_sha(uint8_t *p_buf, int num_bytes, uint8_t *p_sha, int sha_len) { |