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 */
  13 void flush_data_cache_local(void *);  /* flushes local data-cache only */
  14 void flush_instruction_cache_local(void *); /* flushes local code-cache only */
  15 #ifdef CONFIG_SMP
  16 void flush_data_cache(void); /* flushes data-cache only (all processors) */
  17 void 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
  25 void flush_user_icache_range_asm(unsigned long, unsigned long);
  26 void flush_kernel_icache_range_asm(unsigned long, unsigned long);
  27 void flush_user_dcache_range_asm(unsigned long, unsigned long);
  28 void flush_kernel_dcache_range_asm(unsigned long, unsigned long);
  29 void purge_kernel_dcache_range_asm(unsigned long, unsigned long);
  30 void flush_kernel_dcache_page_asm(void *);
  31 void flush_kernel_icache_page(void *);
  32
  33 /* Cache flush operations */
  34
  35 void flush_cache_all_local(void);
  36 void flush_cache_all(void);
  37 void flush_cache_mm(struct mm_struct *mm);
  38
  39 void 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
  45 void flush_kernel_vmap_range(void *vaddr, int size);
  46 void 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
  52 extern 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) \
  68 do { \
  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) \
  75 do { \
  76         flush_cache_page(vma, vaddr, page_to_pfn(page)); \
  77         memcpy(dst, src, len); \
  78 } while (0)
  79
  80 void flush_cache_page(struct vm_area_struct *vma, unsigned long vmaddr, unsigned long pfn);
  81 void 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 */
  85 void flush_dcache_page_asm(unsigned long phys_addr, unsigned long vaddr);
  86
  87 #define ARCH_HAS_FLUSH_ANON_PAGE
  88 static inline void
  89 flush_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
 100 static inline void kunmap_flush_on_unmap(void *addr)
 101 {
 102         flush_kernel_dcache_page_addr(addr);
 103 }
 104
 105 #endif /* _PARISC_CACHEFLUSH_H */
 106