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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 |