1367b8112SChris Zankel /* 2367b8112SChris Zankel * include/asm-xtensa/highmem.h 3367b8112SChris Zankel * 4367b8112SChris Zankel * This file is subject to the terms and conditions of the GNU General 5367b8112SChris Zankel * Public License. See the file "COPYING" in the main directory of 6367b8112SChris Zankel * this archive for more details. 7367b8112SChris Zankel * 8367b8112SChris Zankel * Copyright (C) 2003 - 2005 Tensilica Inc. 965559100SMax Filippov * Copyright (C) 2014 Cadence Design Systems Inc. 10367b8112SChris Zankel */ 11367b8112SChris Zankel 12367b8112SChris Zankel #ifndef _XTENSA_HIGHMEM_H 13367b8112SChris Zankel #define _XTENSA_HIGHMEM_H 14367b8112SChris Zankel 158504b503SMax Filippov #include <linux/wait.h> 1665fddcfcSMike Rapoport #include <linux/pgtable.h> 1765559100SMax Filippov #include <asm/cacheflush.h> 1865559100SMax Filippov #include <asm/fixmap.h> 1965559100SMax Filippov 208504b503SMax Filippov #define PKMAP_BASE ((FIXADDR_START - \ 218504b503SMax Filippov (LAST_PKMAP + 1) * PAGE_SIZE) & PMD_MASK) 228504b503SMax Filippov #define LAST_PKMAP (PTRS_PER_PTE * DCACHE_N_COLORS) 2365559100SMax Filippov #define LAST_PKMAP_MASK (LAST_PKMAP - 1) 2465559100SMax Filippov #define PKMAP_NR(virt) (((virt) - PKMAP_BASE) >> PAGE_SHIFT) 2565559100SMax Filippov #define PKMAP_ADDR(nr) (PKMAP_BASE + ((nr) << PAGE_SHIFT)) 2665559100SMax Filippov 27ff009ab6SMax Filippov #define kmap_prot PAGE_KERNEL_EXEC 2865559100SMax Filippov 298504b503SMax Filippov #if DCACHE_WAY_SIZE > PAGE_SIZE 308504b503SMax Filippov #define get_pkmap_color get_pkmap_color 318504b503SMax Filippov static inline int get_pkmap_color(struct page *page) 328504b503SMax Filippov { 338504b503SMax Filippov return DCACHE_ALIAS(page_to_phys(page)); 348504b503SMax Filippov } 358504b503SMax Filippov 368504b503SMax Filippov extern unsigned int last_pkmap_nr_arr[]; 378504b503SMax Filippov 388504b503SMax Filippov static inline unsigned int get_next_pkmap_nr(unsigned int color) 398504b503SMax Filippov { 408504b503SMax Filippov last_pkmap_nr_arr[color] = 418504b503SMax Filippov (last_pkmap_nr_arr[color] + DCACHE_N_COLORS) & LAST_PKMAP_MASK; 428504b503SMax Filippov return last_pkmap_nr_arr[color] + color; 438504b503SMax Filippov } 448504b503SMax Filippov 458504b503SMax Filippov static inline int no_more_pkmaps(unsigned int pkmap_nr, unsigned int color) 468504b503SMax Filippov { 478504b503SMax Filippov return pkmap_nr < DCACHE_N_COLORS; 488504b503SMax Filippov } 498504b503SMax Filippov 508504b503SMax Filippov static inline int get_pkmap_entries_count(unsigned int color) 518504b503SMax Filippov { 528504b503SMax Filippov return LAST_PKMAP / DCACHE_N_COLORS; 538504b503SMax Filippov } 548504b503SMax Filippov 558504b503SMax Filippov extern wait_queue_head_t pkmap_map_wait_arr[]; 568504b503SMax Filippov 578504b503SMax Filippov static inline wait_queue_head_t *get_pkmap_wait_queue_head(unsigned int color) 588504b503SMax Filippov { 598504b503SMax Filippov return pkmap_map_wait_arr + color; 608504b503SMax Filippov } 618504b503SMax Filippov #endif 628504b503SMax Filippov 6365559100SMax Filippov extern pte_t *pkmap_page_table; 6465559100SMax Filippov 6565559100SMax Filippov static inline void flush_cache_kmaps(void) 6665559100SMax Filippov { 6765559100SMax Filippov flush_cache_all(); 6865559100SMax Filippov } 6965559100SMax Filippov 70*629ed3f7SThomas Gleixner enum fixed_addresses kmap_local_map_idx(int type, unsigned long pfn); 71*629ed3f7SThomas Gleixner #define arch_kmap_local_map_idx kmap_local_map_idx 72*629ed3f7SThomas Gleixner 73*629ed3f7SThomas Gleixner enum fixed_addresses kmap_local_unmap_idx(int type, unsigned long addr); 74*629ed3f7SThomas Gleixner #define arch_kmap_local_unmap_idx kmap_local_unmap_idx 75*629ed3f7SThomas Gleixner 76*629ed3f7SThomas Gleixner #define arch_kmap_local_post_unmap(vaddr) \ 77*629ed3f7SThomas Gleixner local_flush_tlb_kernel_range(vaddr, vaddr + PAGE_SIZE) 78*629ed3f7SThomas Gleixner 7965559100SMax Filippov void kmap_init(void); 80367b8112SChris Zankel 81367b8112SChris Zankel #endif 82