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authorWill Deacon <will.deacon@arm.com>2011-09-30 12:43:29 +0200
committerWill Deacon <will.deacon@arm.com>2011-12-06 15:04:14 +0100
commit8903826d0cd99aed9267e792d38284cf3092042b (patch)
treeec75fed09f62c215e2057d8c5e82c343e627c8fe /arch/arm/include/asm/pgtable.h
parentARM: 7189/1: OMAP3: Fix build break in cpuidle34xx.c because of irq function (diff)
downloadlinux-8903826d0cd99aed9267e792d38284cf3092042b.tar.xz
linux-8903826d0cd99aed9267e792d38284cf3092042b.zip
ARM: idmap: populate identity map pgd at init time using .init.text
When disabling and re-enabling the MMU, it is necessary to take out an identity mapping for the code that manipulates the SCTLR in order to avoid it disappearing from under our feet. This is useful when soft rebooting and returning from CPU suspend. This patch allocates a set of page tables during boot and populates them with an identity mapping for the .idmap.text section. This means that users of the identity map do not need to manage their own pgd and can instead annotate their functions with __idmap or, in the case of assembly code, place them in the correct section. Acked-by: Dave Martin <dave.martin@linaro.org> Reviewed-by: Catalin Marinas <catalin.marinas@arm.com> Tested-by: Lorenzo Pieralisi <Lorenzo.Pieralisi@arm.com> Signed-off-by: Will Deacon <will.deacon@arm.com>
Diffstat (limited to 'arch/arm/include/asm/pgtable.h')
-rw-r--r--arch/arm/include/asm/pgtable.h3
1 files changed, 0 insertions, 3 deletions
diff --git a/arch/arm/include/asm/pgtable.h b/arch/arm/include/asm/pgtable.h
index 9451dce3a553..03893a55e680 100644
--- a/arch/arm/include/asm/pgtable.h
+++ b/arch/arm/include/asm/pgtable.h
@@ -346,9 +346,6 @@ static inline pte_t pte_modify(pte_t pte, pgprot_t newprot)
#define pgtable_cache_init() do { } while (0)
-void identity_mapping_add(pgd_t *, unsigned long, unsigned long);
-void identity_mapping_del(pgd_t *, unsigned long, unsigned long);
-
#endif /* !__ASSEMBLY__ */
#endif /* CONFIG_MMU */