root/arch/parisc/include/asm/cacheflush.h

INCLUDED FROM

DEFINITIONS

1. flush_kernel_dcache_page
2. flush_anon_page
3. kmap
4. kunmap
5. kmap_atomic
6. __kunmap_atomic

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