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100 lines
2.8 KiB
C
100 lines
2.8 KiB
C
/* SPDX-License-Identifier: GPL-2.0 */
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/*
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* Copyright (C) 2020 Loongson Technology Corporation Limited
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*/
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#ifndef _ASM_CACHEFLUSH_H
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#define _ASM_CACHEFLUSH_H
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#include <linux/mm.h>
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#include <asm/cpu-features.h>
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#include <asm/cacheops.h>
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/*
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* This flag is used to indicate that the page pointed to by a pte
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* is dirty and requires cleaning before returning it to the user.
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*/
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#define PG_dcache_dirty PG_arch_1
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#define Page_dcache_dirty(page) \
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test_bit(PG_dcache_dirty, &(page)->flags)
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#define SetPageDcacheDirty(page) \
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set_bit(PG_dcache_dirty, &(page)->flags)
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#define ClearPageDcacheDirty(page) \
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clear_bit(PG_dcache_dirty, &(page)->flags)
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extern void local_flush_icache_range(unsigned long start, unsigned long end);
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#define flush_icache_range local_flush_icache_range
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#define flush_icache_user_range local_flush_icache_range
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extern void copy_to_user_page(struct vm_area_struct *vma,
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struct page *page, unsigned long vaddr, void *dst, const void *src,
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unsigned long len);
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extern void copy_from_user_page(struct vm_area_struct *vma,
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struct page *page, unsigned long vaddr, void *dst, const void *src,
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unsigned long len);
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#define ARCH_IMPLEMENTS_FLUSH_DCACHE_PAGE 1
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#define flush_cache_all() do { } while (0)
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#define flush_cache_mm(mm) do { } while (0)
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#define flush_cache_dup_mm(mm) do { } while (0)
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#define flush_cache_range(vma, start, end) do { } while (0)
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#define flush_cache_page(vma, vmaddr, pfn) do { } while (0)
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#define flush_cache_vmap(start, end) do { } while (0)
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#define flush_cache_vunmap(start, end) do { } while (0)
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#define flush_icache_page(vma, page) do { } while (0)
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#define flush_icache_user_page(vma, page, addr, len) do { } while (0)
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#define flush_dcache_page(page) do { } while (0)
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#define flush_dcache_mmap_lock(mapping) do { } while (0)
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#define flush_dcache_mmap_unlock(mapping) do { } while (0)
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#define cache_op(op, addr) \
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__asm__ __volatile__( \
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" cacop %0, %1 \n" \
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: \
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: "i" (op), "ZC" (*(unsigned char *)(addr)))
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static inline void flush_icache_line_indexed(unsigned long addr)
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{
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cache_op(Index_Invalidate_I, addr);
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}
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static inline void flush_dcache_line_indexed(unsigned long addr)
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{
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cache_op(Index_Writeback_Inv_D, addr);
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}
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static inline void flush_vcache_line_indexed(unsigned long addr)
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{
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cache_op(Index_Writeback_Inv_V, addr);
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}
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static inline void flush_scache_line_indexed(unsigned long addr)
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{
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cache_op(Index_Writeback_Inv_S, addr);
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}
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static inline void flush_icache_line(unsigned long addr)
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{
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cache_op(Hit_Invalidate_I, addr);
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}
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static inline void flush_dcache_line(unsigned long addr)
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{
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cache_op(Hit_Writeback_Inv_D, addr);
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}
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static inline void flush_vcache_line(unsigned long addr)
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{
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cache_op(Hit_Writeback_Inv_V, addr);
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}
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static inline void flush_scache_line(unsigned long addr)
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{
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cache_op(Hit_Writeback_Inv_S, addr);
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}
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#endif /* _ASM_CACHEFLUSH_H */
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