MIPS: Allow platform specific scratch registers

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XLR/XLP COP0 scratch is register 22, sel 0-7. Add a function
c0_kscratch() which returns the scratch register for the platform,
and use the return value while generating TLB handlers.

Setup kscratch_mask to 0xf for XLR/XLP since the config4 register
does not exist. This allows the kernel to allocate scratch registers
0-3 if needed.

Signed-off-by: Jayachandran C <jchandra@broadcom.com>
Cc: linux-mips@linux-mips.org
Patchwork: https://patchwork.linux-mips.org/patch/5445/
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>

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Jayachandran C 2013-06-11 14:41:35 +00:00 • committed by Ralf Baechle

parent 8ecd08378c

commit 7777b9395b

2 changed files with 27 additions and 15 deletions

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1

arch/mips/kernel/cpu-probe.c

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41

arch/mips/mm/tlbex.c

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