diff options
Diffstat (limited to 'arch/x86/include/asm/memtype.h')
-rw-r--r-- | arch/x86/include/asm/memtype.h | 29 |
1 files changed, 29 insertions, 0 deletions
diff --git a/arch/x86/include/asm/memtype.h b/arch/x86/include/asm/memtype.h new file mode 100644 index 0000000000..113b2fa518 --- /dev/null +++ b/arch/x86/include/asm/memtype.h @@ -0,0 +1,29 @@ +/* SPDX-License-Identifier: GPL-2.0 */ +#ifndef _ASM_X86_MEMTYPE_H +#define _ASM_X86_MEMTYPE_H + +#include <linux/types.h> +#include <asm/pgtable_types.h> + +extern bool pat_enabled(void); +extern void pat_bp_init(void); +extern void pat_cpu_init(void); + +extern int memtype_reserve(u64 start, u64 end, + enum page_cache_mode req_pcm, enum page_cache_mode *ret_pcm); +extern int memtype_free(u64 start, u64 end); + +extern int memtype_kernel_map_sync(u64 base, unsigned long size, + enum page_cache_mode pcm); + +extern int memtype_reserve_io(resource_size_t start, resource_size_t end, + enum page_cache_mode *pcm); + +extern void memtype_free_io(resource_size_t start, resource_size_t end); + +extern bool pat_pfn_immune_to_uc_mtrr(unsigned long pfn); + +bool x86_has_pat_wp(void); +enum page_cache_mode pgprot2cachemode(pgprot_t pgprot); + +#endif /* _ASM_X86_MEMTYPE_H */ |