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ARM: pm: preallocate a page table for suspend/resume

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Preallocate a page table and setup an identity mapping for the MMU
enable code.  This means we don't have to "borrow" a page table to
do this, avoiding complexities with L2 cache coherency.

Tested-by: Santosh Shilimkar <santosh.shilimkar@ti.com>
Tested-by: Shawn Guo <shawn.guo@linaro.org>
Tested-by: Lorenzo Pieralisi <lorenzo.pieralisi@arm.com>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
This commit is contained in:
Russell King
2011-08-26 20:28:52 +01:00
parent f5fa68d967
commit e8ce0eb5e2
11 changed files with 62 additions and 72 deletions
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4
arch/arm/mm/proc-sa1100.S
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@ -192,10 +192,6 @@ ENTRY(cpu_sa1100_do_resume)
mcr p15, 0, r5, c2, c0, 0 @ translation table base addr
mcr p15, 0, r6, c13, c0, 0 @ PID
mov r0, r7 @ control register
mov r2, r5, lsr #14 @ get TTB0 base
mov r2, r2, lsl #14
ldr r3, =PMD_TYPE_SECT | PMD_SECT_BUFFERABLE | \
PMD_SECT_CACHEABLE | PMD_SECT_AP_WRITE
b cpu_resume_mmu
ENDPROC(cpu_sa1100_do_resume)
#endif