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ArmPkg: Fix the return type of the ReadCCSIDR function

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When CCIDX is supported, the Current Cache Size ID Register contains
data above 32 bits: namely the number of sets. Avoid truncating this
by returning a UINTN instead of UINT32. On AARCH32, the expanded
number of sets data can be read via the CCSIDR2 register.

Also, add Doxygen comments for the function.

Signed-off-by: Rebecca Cran <rebecca@nuviainc.com>
Reviewed-by: Sami Mujawar <sami.mujawar@arm.com>
Reviewed-by: Leif Lindholm <leif@nuviainc.com>
This commit is contained in:
Rebecca Cran
2021-02-07 17:52:39 -07:00
committed by mergify[bot]
parent 827a71cc9e
commit 93ff7a4e8e
4 changed files with 11 additions and 4 deletions
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2
ArmPkg/Library/ArmLib/Arm/ArmLibSupportV7.S
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@@ -64,7 +64,7 @@ ASM_FUNC(ArmReadIdMmfr4)
mrc p15,0,r0,c0,c2,6 @ Read ID_MMFR4 Register
bx lr
// UINT32
// UINTN
// ReadCCSIDR (
// IN UINT32 CSSELR
// )