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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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6
arch/arm/mm/proc-v6.S
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@@ -161,14 +161,8 @@ ENTRY(cpu_v6_do_resume)
mcr p15, 0, ip, c2, c0, 2 @ TTB control register
mcr p15, 0, ip, c7, c5, 4 @ ISB
mov r0, r11 @ control register
mov r2, r7, lsr #14 @ get TTB0 base
mov r2, r2, lsl #14
ldr r3, cpu_resume_l1_flags
b cpu_resume_mmu
ENDPROC(cpu_v6_do_resume)
cpu_resume_l1_flags:
ALT_SMP(.long PMD_TYPE_SECT | PMD_SECT_AP_WRITE | PMD_FLAGS_SMP)
ALT_UP(.long PMD_TYPE_SECT | PMD_SECT_AP_WRITE | PMD_FLAGS_UP)
#endif
string cpu_v6_name, "ARMv6-compatible processor"