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Merge pull request #540 from antonio-nino-diaz-arm/an/porting_guide 

Porting guide: Clarify API that don't follow AAPCS
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danh-arm 2016-03-09 08:44:47 +00:00
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@ -654,7 +654,8 @@ CPU-specific linear index into blocks of memory (for example while allocating
per-CPU stacks). This function will be invoked very early in the
initialization sequence which mandates that this function should be
implemented in assembly and should not rely on the avalability of a C
runtime environment.
runtime environment. This function can clobber x0 - x8 and must preserve
x9 - x29.
This function plays a crucial role in the power domain topology framework in
PSCI and details of this can be found in [Power Domain Topology Design].