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| author | Antonio Nino Diaz <antonio.ninodiaz@arm.com> | 2016-02-01 13:57:25 +0000 |
|---|---|---|
| committer | Antonio Nino Diaz <antonio.ninodiaz@arm.com> | 2016-03-14 16:41:18 +0000 |
| commit | 1c3ea103d28760a04e457678bf60725ae761c28f (patch) | |
| tree | f6614d5fde45a1ffc456eb200239353512dee99f /docs | |
| parent | 195d29f399759813cd42ea2b8d3133ba426e2ba2 (diff) | |
Remove all non-configurable dead loops
Added a new platform porting function plat_panic_handler, to allow
platforms to handle unexpected error situations. It must be
implemented in assembly as it may be called before the C environment
is initialized. A default implementation is provided, which simply
spins.
Corrected all dead loops in generic code to call this function
instead. This includes the dead loop that occurs at the end of the
call to panic().
All unnecesary wfis from bl32/tsp/aarch64/tsp_exceptions.S have
been removed.
Change-Id: I67cb85f6112fa8e77bd62f5718efcef4173d8134
Diffstat (limited to 'docs')
| -rw-r--r-- | docs/porting-guide.md | 14 |
1 files changed, 14 insertions, 0 deletions
diff --git a/docs/porting-guide.md b/docs/porting-guide.md index 741ee207..bd1b4489 100644 --- a/docs/porting-guide.md +++ b/docs/porting-guide.md @@ -783,6 +783,20 @@ Possible errors reported by the generic code are: The default implementation simply spins. +### Function : plat_panic_handler() + + Argument : void + Return : void + +This API is called when the generic code encounters an unexpected error +situation from which it cannot recover. This function must not return, +and must be implemented in assembly because it may be called before the C +environment is initialized. + +Note: The address from where it was called is stored in x30 (Link Register). + +The default implementation simply spins. + 3. Modifications specific to a Boot Loader stage ------------------------------------------------- |