diff options
author | Russell King <rmk+kernel@arm.linux.org.uk> | 2010-11-21 12:41:57 +0100 |
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committer | Russell King <rmk+kernel@arm.linux.org.uk> | 2010-12-22 12:05:33 +0100 |
commit | 614dd0585f376a25c638abbed9c5fbd21d7baece (patch) | |
tree | 9bd2c8bb3523632901e3ddc3f9b1eba24e7671ab /arch/arm/mm/mmu.c | |
parent | ARM: pgtable: remove L2 cache flushes for SMP page table bring-up (diff) | |
download | linux-614dd0585f376a25c638abbed9c5fbd21d7baece.tar.xz linux-614dd0585f376a25c638abbed9c5fbd21d7baece.zip |
ARM: pgtable: collect up identity mapping functions
We have two places where we create identity mappings - one when we bring
secondary CPUs online, and one where we setup some mappings for soft-
reboot. Combine these two into a single implementation. Also collect
the identity mapping deletion function.
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
Diffstat (limited to 'arch/arm/mm/mmu.c')
-rw-r--r-- | arch/arm/mm/mmu.c | 35 |
1 files changed, 0 insertions, 35 deletions
diff --git a/arch/arm/mm/mmu.c b/arch/arm/mm/mmu.c index 94ee0930d690..bd1a11e62f4e 100644 --- a/arch/arm/mm/mmu.c +++ b/arch/arm/mm/mmu.c @@ -1045,38 +1045,3 @@ void __init paging_init(struct machine_desc *mdesc) empty_zero_page = virt_to_page(zero_page); __flush_dcache_page(NULL, empty_zero_page); } - -/* - * In order to soft-boot, we need to insert a 1:1 mapping in place of - * the user-mode pages. This will then ensure that we have predictable - * results when turning the mmu off - */ -void setup_mm_for_reboot(char mode) -{ - unsigned long base_pmdval; - pgd_t *pgd; - int i; - - /* - * We need to access to user-mode page tables here. For kernel threads - * we don't have any user-mode mappings so we use the context that we - * "borrowed". - */ - pgd = current->active_mm->pgd; - - base_pmdval = PMD_SECT_AP_WRITE | PMD_SECT_AP_READ | PMD_TYPE_SECT; - if (cpu_architecture() <= CPU_ARCH_ARMv5TEJ && !cpu_is_xscale()) - base_pmdval |= PMD_BIT4; - - for (i = 0; i < FIRST_USER_PGD_NR + USER_PTRS_PER_PGD; i++, pgd++) { - unsigned long pmdval = (i << PGDIR_SHIFT) | base_pmdval; - pmd_t *pmd; - - pmd = pmd_off(pgd, i << PGDIR_SHIFT); - pmd[0] = __pmd(pmdval); - pmd[1] = __pmd(pmdval + (1 << (PGDIR_SHIFT - 1))); - flush_pmd_entry(pmd); - } - - local_flush_tlb_all(); -} |