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 flush_kernel_dcache_page_asm(void *);
  30 void flush_kernel_icache_page(void *);
  31
  32 /* Cache flush operations */
  33
  34 void flush_cache_all_local(void);
  35 void flush_cache_all(void);
  36 void flush_cache_mm(struct mm_struct *mm);
  37
  38 #define ARCH_HAS_FLUSH_KERNEL_DCACHE_PAGE
  39 void flush_kernel_dcache_page_addr(void *addr);
  40 static inline void flush_kernel_dcache_page(struct page *page)
  41 {
  42         flush_kernel_dcache_page_addr(page_address(page));
  43 }
  44
  45 #define flush_kernel_dcache_range(start,size) \
  46         flush_kernel_dcache_range_asm((start), (start)+(size));
  47
  48 void flush_kernel_vmap_range(void *vaddr, int size);
  49 void invalidate_kernel_vmap_range(void *vaddr, int size);
  50
  51 #define flush_cache_vmap(start, end)            flush_cache_all()
  52 #define flush_cache_vunmap(start, end)          flush_cache_all()
  53
  54 #define ARCH_IMPLEMENTS_FLUSH_DCACHE_PAGE 1
  55 extern void flush_dcache_page(struct page *page);
  56
  57 #define flush_dcache_mmap_lock(mapping) \
  58         spin_lock_irq(&(mapping)->tree_lock)
  59 #define flush_dcache_mmap_unlock(mapping) \
  60         spin_unlock_irq(&(mapping)->tree_lock)
  61
  62 #define flush_icache_page(vma,page)     do {            \
  63         flush_kernel_dcache_page(page);                 \
  64         flush_kernel_icache_page(page_address(page));   \
  65 } while (0)
  66
  67 #define flush_icache_range(s,e)         do {            \
  68         flush_kernel_dcache_range_asm(s,e);             \
  69         flush_kernel_icache_range_asm(s,e);             \
  70 } while (0)
  71
  72 #define copy_to_user_page(vma, page, vaddr, dst, src, len) \
  73 do { \
  74         flush_cache_page(vma, vaddr, page_to_pfn(page)); \
  75         memcpy(dst, src, len); \
  76         flush_kernel_dcache_range_asm((unsigned long)dst, (unsigned long)dst + len); \
  77 } while (0)
  78
  79 #define copy_from_user_page(vma, page, vaddr, dst, src, len) \
  80 do { \
  81         flush_cache_page(vma, vaddr, page_to_pfn(page)); \
  82         memcpy(dst, src, len); \
  83 } while (0)
  84
  85 void flush_cache_page(struct vm_area_struct *vma, unsigned long vmaddr, unsigned long pfn);
  86 void flush_cache_range(struct vm_area_struct *vma,
  87                 unsigned long start, unsigned long end);
  88
  89 /* defined in pacache.S exported in cache.c used by flush_anon_page */
  90 void flush_dcache_page_asm(unsigned long phys_addr, unsigned long vaddr);
  91
  92 #define ARCH_HAS_FLUSH_ANON_PAGE
  93 static inline void
  94 flush_anon_page(struct vm_area_struct *vma, struct page *page, unsigned long vmaddr)
  95 {
  96         if (PageAnon(page)) {
  97                 flush_tlb_page(vma, vmaddr);
  98                 preempt_disable();
  99                 flush_dcache_page_asm(page_to_phys(page), vmaddr);
 100                 preempt_enable();
 101         }
 102 }
 103
 104 #include <asm/kmap_types.h>
 105
 106 #define ARCH_HAS_KMAP
 107
 108 static inline void *kmap(struct page *page)
 109 {
 110         might_sleep();
 111         return page_address(page);
 112 }
 113
 114 static inline void kunmap(struct page *page)
 115 {
 116         flush_kernel_dcache_page_addr(page_address(page));
 117 }
 118
 119 static inline void *kmap_atomic(struct page *page)
 120 {
 121         preempt_disable();
 122         pagefault_disable();
 123         return page_address(page);
 124 }
 125
 126 static inline void __kunmap_atomic(void *addr)
 127 {
 128         flush_kernel_dcache_page_addr(addr);
 129         pagefault_enable();
 130         preempt_enable();
 131 }
 132
 133 #define kmap_atomic_prot(page, prot)    kmap_atomic(page)
 134 #define kmap_atomic_pfn(pfn)    kmap_atomic(pfn_to_page(pfn))
 135
 136 #endif /* _PARISC_CACHEFLUSH_H */
 137