diff options
Diffstat (limited to 'bl1')
| -rw-r--r-- | bl1/bl1_fwu.c | 61 |
1 files changed, 61 insertions, 0 deletions
diff --git a/bl1/bl1_fwu.c b/bl1/bl1_fwu.c index 43bb4d2b..205ea922 100644 --- a/bl1/bl1_fwu.c +++ b/bl1/bl1_fwu.c @@ -40,6 +40,8 @@ static register_t bl1_fwu_image_resume(register_t image_param, unsigned int flags); static int bl1_fwu_sec_image_done(void **handle, unsigned int flags); +static int bl1_fwu_image_reset(unsigned int image_id, + unsigned int flags); __dead2 static void bl1_fwu_done(void *client_cookie, void *reserved); /* @@ -47,6 +49,9 @@ __dead2 static void bl1_fwu_done(void *client_cookie, void *reserved); */ static unsigned int sec_exec_image_id = INVALID_IMAGE_ID; +/* Authentication status of each image. */ +extern unsigned int auth_img_flags[]; + void cm_set_next_context(void *cpu_context); /******************************************************************************* @@ -78,6 +83,9 @@ register_t bl1_fwu_smc_handler(unsigned int smc_fid, case FWU_SMC_SEC_IMAGE_DONE: SMC_RET1(handle, bl1_fwu_sec_image_done(&handle, flags)); + case FWU_SMC_IMAGE_RESET: + SMC_RET1(handle, bl1_fwu_image_reset(x1, flags)); + case FWU_SMC_UPDATE_DONE: bl1_fwu_done((void *)x1, NULL); /* We should never return from bl1_fwu_done() */ @@ -666,3 +674,56 @@ __dead2 static void bl1_fwu_done(void *client_cookie, void *reserved) bl1_plat_fwu_done(client_cookie, reserved); assert(0); } + +/******************************************************************************* + * This function resets an image to IMAGE_STATE_RESET. It fails if the image is + * being executed. + ******************************************************************************/ +static int bl1_fwu_image_reset(unsigned int image_id, unsigned int flags) +{ + image_desc_t *image_desc = bl1_plat_get_image_desc(image_id); + + if ((!image_desc) || (GET_SECURITY_STATE(flags) == SECURE)) { + WARN("BL1-FWU: Reset not allowed due to invalid args\n"); + return -EPERM; + } + + switch (image_desc->state) { + + case IMAGE_STATE_RESET: + /* Nothing to do. */ + break; + + case IMAGE_STATE_INTERRUPTED: + case IMAGE_STATE_AUTHENTICATED: + case IMAGE_STATE_COPIED: + case IMAGE_STATE_COPYING: + + if (bl1_fwu_remove_loaded_id(image_id)) { + WARN("BL1-FWU: Image reset couldn't find the image ID\n"); + return -EPERM; + } + + /* Clear the memory.*/ + zero_normalmem((void *)image_desc->image_info.image_base, + image_desc->copied_size); + flush_dcache_range(image_desc->image_info.image_base, + image_desc->copied_size); + + /* Reset status variables */ + image_desc->copied_size = 0; + image_desc->image_info.image_size = 0; + image_desc->state = IMAGE_STATE_RESET; + + /* Clear authentication state */ + auth_img_flags[image_id] = 0; + + break; + + case IMAGE_STATE_EXECUTED: + default: + assert(0); + } + + return 0; +} |