1/* SPDX-License-Identifier: GPL-2.0 */
2#ifndef _ASM_X86_MEMTYPE_H
3#define _ASM_X86_MEMTYPE_H
4
5#include <linux/types.h>
6#include <asm/pgtable_types.h>
7
8extern bool pat_enabled(void);
9extern void pat_bp_init(void);
10extern void pat_cpu_init(void);
11
12extern int memtype_reserve(u64 start, u64 end,
13 enum page_cache_mode req_pcm, enum page_cache_mode *ret_pcm);
14extern int memtype_free(u64 start, u64 end);
15
16extern int memtype_kernel_map_sync(u64 base, unsigned long size,
17 enum page_cache_mode pcm);
18
19extern int memtype_reserve_io(resource_size_t start, resource_size_t end,
20 enum page_cache_mode *pcm);
21
22extern void memtype_free_io(resource_size_t start, resource_size_t end);
23
24extern bool pat_pfn_immune_to_uc_mtrr(unsigned long pfn);
25
26bool x86_has_pat_wp(void);
27enum page_cache_mode pgprot2cachemode(pgprot_t pgprot);
28
29#endif /* _ASM_X86_MEMTYPE_H */
30