diff options
Diffstat (limited to 'arch/sh/mm/init.c')
| -rw-r--r-- | arch/sh/mm/init.c | 27 |
1 files changed, 14 insertions, 13 deletions
diff --git a/arch/sh/mm/init.c b/arch/sh/mm/init.c index d4681a55c852..f1a494283c4e 100644 --- a/arch/sh/mm/init.c +++ b/arch/sh/mm/init.c @@ -23,7 +23,19 @@ DEFINE_PER_CPU(struct mmu_gather, mmu_gathers); pgd_t swapper_pg_dir[PTRS_PER_PGD]; -unsigned long cached_to_uncached = 0; + +#ifdef CONFIG_SUPERH32 +/* + * Handle trivial transitions between cached and uncached + * segments, making use of the 1:1 mapping relationship in + * 512MB lowmem. + * + * This is the offset of the uncached section from its cached alias. + * Default value only valid in 29 bit mode, in 32bit mode will be + * overridden in pmb_init. + */ +unsigned long cached_to_uncached = P2SEG - P1SEG; +#endif #ifdef CONFIG_MMU static void set_pte_phys(unsigned long addr, unsigned long phys, pgprot_t prot) @@ -58,9 +70,7 @@ static void set_pte_phys(unsigned long addr, unsigned long phys, pgprot_t prot) } set_pte(pte, pfn_pte(phys >> PAGE_SHIFT, prot)); - - if (cached_to_uncached) - flush_tlb_one(get_asid(), addr); + flush_tlb_one(get_asid(), addr); } /* @@ -165,15 +175,6 @@ void __init paging_init(void) #ifdef CONFIG_SUPERH32 /* Set up the uncached fixmap */ set_fixmap_nocache(FIX_UNCACHED, __pa(&__uncached_start)); - -#ifdef CONFIG_29BIT - /* - * Handle trivial transitions between cached and uncached - * segments, making use of the 1:1 mapping relationship in - * 512MB lowmem. - */ - cached_to_uncached = P2SEG - P1SEG; -#endif #endif } |