diff options
Diffstat (limited to 'arch/frv/mm/highmem.c')
| -rw-r--r-- | arch/frv/mm/highmem.c | 50 |
1 files changed, 49 insertions, 1 deletions
diff --git a/arch/frv/mm/highmem.c b/arch/frv/mm/highmem.c index 7f77db7fabc..bed9a9bd3c1 100644 --- a/arch/frv/mm/highmem.c +++ b/arch/frv/mm/highmem.c @@ -37,5 +37,53 @@ struct page *kmap_atomic_to_page(void *ptr) return virt_to_page(ptr); } +void *kmap_atomic(struct page *page) +{ + unsigned long paddr; + int type; + + pagefault_disable(); + type = kmap_atomic_idx_push(); + paddr = page_to_phys(page); + + switch (type) { + /* + * The first 4 primary maps are reserved for architecture code + */ + case 0: return __kmap_atomic_primary(0, paddr, 6); + case 1: return __kmap_atomic_primary(0, paddr, 7); + case 2: return __kmap_atomic_primary(0, paddr, 8); + case 3: return __kmap_atomic_primary(0, paddr, 9); + case 4: return __kmap_atomic_primary(0, paddr, 10); + + case 5 ... 5 + NR_TLB_LINES - 1: + return __kmap_atomic_secondary(type - 5, paddr); + + default: + BUG(); + return NULL; + } +} +EXPORT_SYMBOL(kmap_atomic); + +void __kunmap_atomic(void *kvaddr) +{ + int type = kmap_atomic_idx(); + switch (type) { + case 0: __kunmap_atomic_primary(0, 6); break; + case 1: __kunmap_atomic_primary(0, 7); break; + case 2: __kunmap_atomic_primary(0, 8); break; + case 3: __kunmap_atomic_primary(0, 9); break; + case 4: __kunmap_atomic_primary(0, 10); break; -EXPORT_SYMBOL(kmap_atomic_to_page); + case 5 ... 5 + NR_TLB_LINES - 1: + __kunmap_atomic_secondary(type - 5, kvaddr); + break; + + default: + BUG(); + } + kmap_atomic_idx_pop(); + pagefault_enable(); +} +EXPORT_SYMBOL(__kunmap_atomic); |