LXR linux/arch/parisc/include/asm/cacheflush.h

   1/* SPDX-License-Identifier: GPL-2.0 */
   2#ifndef _PARISC_CACHEFLUSH_H
   3#define _PARISC_CACHEFLUSH_H
   4
   5#include <linux/mm.h>
   6#include <linux/uaccess.h>
   7#include <asm/tlbflush.h>
   8
   9/* The usual comment is "Caches aren't brain-dead on the <architecture>".
  10 * Unfortunately, that doesn't apply to PA-RISC. */
  11
  12/* Internal implementation */
  13void flush_data_cache_local(void *);  /* flushes local data-cache only */
  14void flush_instruction_cache_local(void *); /* flushes local code-cache only */
  15#ifdef CONFIG_SMP
  16void flush_data_cache(void); /* flushes data-cache only (all processors) */
  17void flush_instruction_cache(void); /* flushes i-cache only (all processors) */
  18#else
  19#define flush_data_cache() flush_data_cache_local(NULL)
  20#define flush_instruction_cache() flush_instruction_cache_local(NULL)
  21#endif
  22
  23#define flush_cache_dup_mm(mm) flush_cache_mm(mm)
  24
  25void flush_user_icache_range_asm(unsigned long, unsigned long);
  26void flush_kernel_icache_range_asm(unsigned long, unsigned long);
  27void flush_user_dcache_range_asm(unsigned long, unsigned long);
  28void flush_kernel_dcache_range_asm(unsigned long, unsigned long);
  29void purge_kernel_dcache_range_asm(unsigned long, unsigned long);
  30void flush_kernel_dcache_page_asm(void *);
  31void flush_kernel_icache_page(void *);
  32
  33/* Cache flush operations */
  34
  35void flush_cache_all_local(void);
  36void flush_cache_all(void);
  37void flush_cache_mm(struct mm_struct *mm);
  38
  39void flush_kernel_dcache_page_addr(void *addr);
  40
  41#define flush_kernel_dcache_range(start,size) \
  42        flush_kernel_dcache_range_asm((start), (start)+(size));
  43
  44#define ARCH_IMPLEMENTS_FLUSH_KERNEL_VMAP_RANGE 1
  45void flush_kernel_vmap_range(void *vaddr, int size);
  46void invalidate_kernel_vmap_range(void *vaddr, int size);
  47
  48#define flush_cache_vmap(start, end)            flush_cache_all()
  49#define flush_cache_vunmap(start, end)          flush_cache_all()
  50
  51#define ARCH_IMPLEMENTS_FLUSH_DCACHE_PAGE 1
  52extern void flush_dcache_page(struct page *page);
  53
  54#define flush_dcache_mmap_lock(mapping)         xa_lock_irq(&mapping->i_pages)
  55#define flush_dcache_mmap_unlock(mapping)       xa_unlock_irq(&mapping->i_pages)
  56
  57#define flush_icache_page(vma,page)     do {            \
  58        flush_kernel_dcache_page_addr(page_address(page)); \
  59        flush_kernel_icache_page(page_address(page));   \
  60} while (0)
  61
  62#define flush_icache_range(s,e)         do {            \
  63        flush_kernel_dcache_range_asm(s,e);             \
  64        flush_kernel_icache_range_asm(s,e);             \
  65} while (0)
  66
  67#define copy_to_user_page(vma, page, vaddr, dst, src, len) \
  68do { \
  69        flush_cache_page(vma, vaddr, page_to_pfn(page)); \
  70        memcpy(dst, src, len); \
  71        flush_kernel_dcache_range_asm((unsigned long)dst, (unsigned long)dst + len); \
  72} while (0)
  73
  74#define copy_from_user_page(vma, page, vaddr, dst, src, len) \
  75do { \
  76        flush_cache_page(vma, vaddr, page_to_pfn(page)); \
  77        memcpy(dst, src, len); \
  78} while (0)
  79
  80void flush_cache_page(struct vm_area_struct *vma, unsigned long vmaddr, unsigned long pfn);
  81void flush_cache_range(struct vm_area_struct *vma,
  82                unsigned long start, unsigned long end);
  83
  84/* defined in pacache.S exported in cache.c used by flush_anon_page */
  85void flush_dcache_page_asm(unsigned long phys_addr, unsigned long vaddr);
  86
  87#define ARCH_HAS_FLUSH_ANON_PAGE
  88static inline void
  89flush_anon_page(struct vm_area_struct *vma, struct page *page, unsigned long vmaddr)
  90{
  91        if (PageAnon(page)) {
  92                flush_tlb_page(vma, vmaddr);
  93                preempt_disable();
  94                flush_dcache_page_asm(page_to_phys(page), vmaddr);
  95                preempt_enable();
  96        }
  97}
  98
  99#define ARCH_HAS_FLUSH_ON_KUNMAP
 100static inline void kunmap_flush_on_unmap(void *addr)
 101{
 102        flush_kernel_dcache_page_addr(addr);
 103}
 104
 105#endif /* _PARISC_CACHEFLUSH_H */
 106
 107