diff options
Diffstat (limited to 'arch/x86/mm/iomap_32.c')
| -rw-r--r-- | arch/x86/mm/iomap_32.c | 55 |
1 files changed, 4 insertions, 51 deletions
diff --git a/arch/x86/mm/iomap_32.c b/arch/x86/mm/iomap_32.c index d5e2842..04102d4 100644 --- a/arch/x86/mm/iomap_32.c +++ b/arch/x86/mm/iomap_32.c @@ -20,63 +20,16 @@ #include <asm/pat.h> #include <linux/module.h> -#ifdef CONFIG_X86_PAE -static int -is_io_mapping_possible(resource_size_t base, unsigned long size) -{ - return 1; -} -#else -static int -is_io_mapping_possible(resource_size_t base, unsigned long size) +int is_io_mapping_possible(resource_size_t base, unsigned long size) { +#ifndef CONFIG_X86_PAE /* There is no way to map greater than 1 << 32 address without PAE */ if (base + size > 0x100000000ULL) return 0; - - return 1; -} #endif - -int -reserve_io_memtype_wc(u64 base, unsigned long size, pgprot_t *prot) -{ - unsigned long ret_flag; - - if (!is_io_mapping_possible(base, size)) - goto out_err; - - if (!pat_enabled) { - *prot = pgprot_noncached(PAGE_KERNEL); - return 0; - } - - if (reserve_memtype(base, base + size, _PAGE_CACHE_WC, &ret_flag)) - goto out_err; - - if (ret_flag == _PAGE_CACHE_WB) - goto out_free; - - if (kernel_map_sync_memtype(base, size, ret_flag)) - goto out_free; - - *prot = __pgprot(__PAGE_KERNEL | ret_flag); - return 0; - -out_free: - free_memtype(base, base + size); -out_err: - return -EINVAL; -} -EXPORT_SYMBOL_GPL(reserve_io_memtype_wc); - -void -free_io_memtype(u64 base, unsigned long size) -{ - if (pat_enabled) - free_memtype(base, base + size); + return 1; } -EXPORT_SYMBOL_GPL(free_io_memtype); +EXPORT_SYMBOL_GPL(is_io_mapping_possible); /* Map 'pfn' using fixed map 'type' and protections 'prot' */ |
