diff options
| author | Antonio Nino Diaz <antonio.ninodiaz@arm.com> | 2017-05-12 16:51:59 +0100 |
|---|---|---|
| committer | Antonio Nino Diaz <antonio.ninodiaz@arm.com> | 2017-06-01 14:52:12 +0100 |
| commit | 9d6fc3c32162cf4c6146a8f918c0790848686086 (patch) | |
| tree | d4303c60f517d08f1ad4581edd21a0dc417d89d6 /docs | |
| parent | 128daee29868a8a4a7cf00508126ea68311fd1cc (diff) | |
FWU: Introduce FWU_SMC_IMAGE_RESET
This SMC is as a means for the image loading state machine to go from
COPYING, COPIED or AUTHENTICATED states to RESET state. Previously, this
was only done when the authentication of an image failed or when the
execution of the image finished.
Documentation updated.
Change-Id: Ida6d4c65017f83ae5e27465ec36f54499c6534d9
Signed-off-by: Antonio Nino Diaz <antonio.ninodiaz@arm.com>
Diffstat (limited to 'docs')
| -rw-r--r-- | docs/firmware-update.md | 22 |
1 files changed, 21 insertions, 1 deletions
diff --git a/docs/firmware-update.md b/docs/firmware-update.md index 56ef15cb..e3eec26f 100644 --- a/docs/firmware-update.md +++ b/docs/firmware-update.md @@ -117,6 +117,7 @@ The following is a brief description of the supported states: * RESET: This is the initial state of every image at the start of FWU. Authentication failure also leads to this state. A secure image may yield to this state if it has completed execution. + It can also be reached by using `FWU_SMC_IMAGE_RESET`. * COPYING: This is the state of a secure image while BL1 is copying it in blocks from non-secure to secure memory. @@ -356,9 +357,28 @@ function `bl1_plat_fwu_done`, passing the optional argument `client_cookie` as a `void *`. The SMC does not return. +### FWU_SMC_IMAGE_RESET + + Arguments: + uint32_t function ID : 0x16 + unsigned int image_id + + Return: + int : 0 (Success) + : -EPERM + + Pre-conditions: + if (secure world caller) return -EPERM + if (image in EXECUTED) return -EPERM + +This SMC sets the state of an image to RESET and zeroes the memory used by it. + +This is only allowed if the image is not being executed. + + - - - - - - - - - - - - - - - - - - - - - - - - - - -_Copyright (c) 2015-2016, ARM Limited and Contributors. All rights reserved._ +_Copyright (c) 2015-2017, ARM Limited and Contributors. All rights reserved._ [Porting Guide]: ./porting-guide.md |