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 8 extern bool pat_enabled(void); 9 extern void pat_bp_init(void); 10 extern void pat_cpu_init(void); 11 12 extern int memtype_reserve(u64 start, u64 end, 13 enum page_cache_mode req_pcm, enum page_cache_mode *ret_pcm); 14 extern int memtype_free(u64 start, u64 end); 15 16 extern int memtype_kernel_map_sync(u64 base, unsigned long size, 17 enum page_cache_mode pcm); 18 19 extern int memtype_reserve_io(resource_size_t start, resource_size_t end, 20 enum page_cache_mode *pcm); 21 22 extern void memtype_free_io(resource_size_t start, resource_size_t end); 23 24 extern bool pat_pfn_immune_to_uc_mtrr(unsigned long pfn); 25 26 bool x86_has_pat_wp(void); 27 enum page_cache_mode pgprot2cachemode(pgprot_t pgprot); 28 29 #endif /* _ASM_X86_MEMTYPE_H */ 30