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| author | Lachlan McIlroy <lachlan@redback.melbourne.sgi.com> | 2008-11-28 15:23:52 +1100 |
|---|---|---|
| committer | Lachlan McIlroy <lachlan@redback.melbourne.sgi.com> | 2008-11-28 15:23:52 +1100 |
| commit | b5a20aa2657063cbf3b47fc700603180de4bb554 (patch) | |
| tree | 9419fb851cda53a7f1fd67a3697bdf8550df19e4 /arch/sh/mm/pg-sh4.c | |
| parent | cc09c0dc57de7f7d2ed89d480b5653e5f6a32f2c (diff) | |
| parent | ed313489badef16d700f5a3be50e8fd8f8294bc8 (diff) | |
Merge git://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux-2.6
Diffstat (limited to 'arch/sh/mm/pg-sh4.c')
| -rw-r--r-- | arch/sh/mm/pg-sh4.c | 17 |
1 files changed, 17 insertions, 0 deletions
diff --git a/arch/sh/mm/pg-sh4.c b/arch/sh/mm/pg-sh4.c index 38870e0fc182..2fe14da1f839 100644 --- a/arch/sh/mm/pg-sh4.c +++ b/arch/sh/mm/pg-sh4.c @@ -7,6 +7,7 @@ * Released under the terms of the GNU GPL v2.0. */ #include <linux/mm.h> +#include <linux/init.h> #include <linux/mutex.h> #include <linux/fs.h> #include <linux/highmem.h> @@ -16,6 +17,20 @@ #define CACHE_ALIAS (current_cpu_data.dcache.alias_mask) +#define kmap_get_fixmap_pte(vaddr) \ + pte_offset_kernel(pmd_offset(pud_offset(pgd_offset_k(vaddr), (vaddr)), (vaddr)), (vaddr)) + +static pte_t *kmap_coherent_pte; + +void __init kmap_coherent_init(void) +{ + unsigned long vaddr; + + /* cache the first coherent kmap pte */ + vaddr = __fix_to_virt(FIX_CMAP_BEGIN); + kmap_coherent_pte = kmap_get_fixmap_pte(vaddr); +} + static inline void *kmap_coherent(struct page *page, unsigned long addr) { enum fixed_addresses idx; @@ -34,6 +49,8 @@ static inline void *kmap_coherent(struct page *page, unsigned long addr) update_mmu_cache(NULL, vaddr, pte); + set_pte(kmap_coherent_pte - (FIX_CMAP_END - idx), pte); + return (void *)vaddr; } |