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84 lines
2.1 KiB
84 lines
2.1 KiB
/* |
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* include/asm-xtensa/highmem.h |
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* |
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* This file is subject to the terms and conditions of the GNU General |
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* Public License. See the file "COPYING" in the main directory of |
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* this archive for more details. |
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* |
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* Copyright (C) 2003 - 2005 Tensilica Inc. |
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* Copyright (C) 2014 Cadence Design Systems Inc. |
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*/ |
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#ifndef _XTENSA_HIGHMEM_H |
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#define _XTENSA_HIGHMEM_H |
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#ifdef CONFIG_HIGHMEM |
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#include <linux/wait.h> |
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#include <linux/pgtable.h> |
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#include <asm/cacheflush.h> |
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#include <asm/fixmap.h> |
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#define PKMAP_BASE ((FIXADDR_START - \ |
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(LAST_PKMAP + 1) * PAGE_SIZE) & PMD_MASK) |
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#define LAST_PKMAP (PTRS_PER_PTE * DCACHE_N_COLORS) |
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#define LAST_PKMAP_MASK (LAST_PKMAP - 1) |
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#define PKMAP_NR(virt) (((virt) - PKMAP_BASE) >> PAGE_SHIFT) |
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#define PKMAP_ADDR(nr) (PKMAP_BASE + ((nr) << PAGE_SHIFT)) |
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#define kmap_prot PAGE_KERNEL_EXEC |
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#if DCACHE_WAY_SIZE > PAGE_SIZE |
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#define get_pkmap_color get_pkmap_color |
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static inline int get_pkmap_color(struct page *page) |
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{ |
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return DCACHE_ALIAS(page_to_phys(page)); |
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} |
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extern unsigned int last_pkmap_nr_arr[]; |
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static inline unsigned int get_next_pkmap_nr(unsigned int color) |
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{ |
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last_pkmap_nr_arr[color] = |
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(last_pkmap_nr_arr[color] + DCACHE_N_COLORS) & LAST_PKMAP_MASK; |
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return last_pkmap_nr_arr[color] + color; |
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} |
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static inline int no_more_pkmaps(unsigned int pkmap_nr, unsigned int color) |
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{ |
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return pkmap_nr < DCACHE_N_COLORS; |
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} |
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static inline int get_pkmap_entries_count(unsigned int color) |
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{ |
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return LAST_PKMAP / DCACHE_N_COLORS; |
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} |
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extern wait_queue_head_t pkmap_map_wait_arr[]; |
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static inline wait_queue_head_t *get_pkmap_wait_queue_head(unsigned int color) |
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{ |
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return pkmap_map_wait_arr + color; |
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} |
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enum fixed_addresses kmap_local_map_idx(int type, unsigned long pfn); |
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#define arch_kmap_local_map_idx kmap_local_map_idx |
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enum fixed_addresses kmap_local_unmap_idx(int type, unsigned long addr); |
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#define arch_kmap_local_unmap_idx kmap_local_unmap_idx |
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#endif |
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extern pte_t *pkmap_page_table; |
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static inline void flush_cache_kmaps(void) |
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{ |
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flush_cache_all(); |
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} |
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#define arch_kmap_local_post_unmap(vaddr) \ |
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local_flush_tlb_kernel_range(vaddr, vaddr + PAGE_SIZE) |
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void kmap_init(void); |
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#endif /* CONFIG_HIGHMEM */ |
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#endif
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