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| author | Soby Mathew <soby.mathew@arm.com> | 2014-08-14 12:22:32 +0100 |
|---|---|---|
| committer | Dan Handley <dan.handley@arm.com> | 2014-08-20 19:14:31 +0100 |
| commit | 24fb838f965cc1250831cd021d6a18b0d371b853 (patch) | |
| tree | 877c35292a581402607cee7287db1e25faa27a53 /docs | |
| parent | 9b4768417051ead50135d1d7675cab940d864e8d (diff) | |
Add platform API for reset handling
This patch adds an optional platform API (plat_reset_handler) which allows the
platform to perform any actions immediately after a cold or warm reset
e.g. implement errata workarounds. The function is called with MMU and caches
turned off. This API is weakly defined and does nothing by default but can be
overriden by a platform with a strong definition.
Change-Id: Ib0acdccbd24bc756528a8bd647df21e8d59707ff
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 62ea6a0..262de73 100644 --- a/docs/porting-guide.md +++ b/docs/porting-guide.md @@ -460,6 +460,20 @@ that these constants are not related to any architectural exception code; they are just an ARM Trusted Firmware convention. +### Function : plat_reset_handler() + + Argument : void + Return : void + +A platform may need to do additional initialization after reset. This function +allows the platform to do the platform specific intializations. Platform +specific errata workarounds could also be implemented here. The api should +preserve the value in x10 register as it is used by the caller to store the +return address. + +The default implementation doesn't do anything. + + 3. Modifications specific to a Boot Loader stage ------------------------------------------------- |