From e6eadc67873d5f363c864cd7723104e7d47dcb44 Mon Sep 17 00:00:00 2001 From: Will Deacon Date: Tue, 15 Nov 2011 11:11:19 +0000 Subject: ARM: suspend: use idmap_pgd instead of suspend_pgd The ARM CPU suspend code requires cpu_resume_mmu to be identity mapped in order to re-enable the MMU when coming out of suspend. Currently, this is accomplished by maintaining a suspend_pgd with the relevant mapping put in place at init time. This patch replaces the use of suspend_pgd with the new idmap_pgd. cpu_resume_mmu is placed in the .idmap.text section so that it is included in the identity map. Reviewed-by: Catalin Marinas Acked-by: Dave Martin Tested-by: Lorenzo Pieralisi Signed-off-by: Will Deacon --- arch/arm/kernel/sleep.S | 2 ++ 1 file changed, 2 insertions(+) (limited to 'arch/arm/kernel/sleep.S') diff --git a/arch/arm/kernel/sleep.S b/arch/arm/kernel/sleep.S index 020e99c845e7..9e64231c8cfe 100644 --- a/arch/arm/kernel/sleep.S +++ b/arch/arm/kernel/sleep.S @@ -54,6 +54,7 @@ ENDPROC(cpu_suspend_abort) * r0 = control register value */ .align 5 + .pushsection .idmap.text,"ax" ENTRY(cpu_resume_mmu) ldr r3, =cpu_resume_after_mmu mcr p15, 0, r0, c1, c0, 0 @ turn on MMU, I-cache, etc @@ -62,6 +63,7 @@ ENTRY(cpu_resume_mmu) mov r0, r0 mov pc, r3 @ jump to virtual address ENDPROC(cpu_resume_mmu) + .popsection cpu_resume_after_mmu: bl cpu_init @ restore the und/abt/irq banked regs mov r0, #0 @ return zero on success -- cgit v1.2.1