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 flush_kernel_dcache_page_asm(void *);
  30void flush_kernel_icache_page(void *);
  31
  32/* Cache flush operations */
  33
  34void flush_cache_all_local(void);
  35void flush_cache_all(void);
  36void flush_cache_mm(struct mm_struct *mm);
  37
  38#define ARCH_HAS_FLUSH_KERNEL_DCACHE_PAGE
  39void flush_kernel_dcache_page_addr(void *addr);
  40static 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
  48void flush_kernel_vmap_range(void *vaddr, int size);
  49void 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
  55extern 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) \
  73do { \
  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) \
  80do { \
  81        flush_cache_page(vma, vaddr, page_to_pfn(page)); \
  82        memcpy(dst, src, len); \
  83} while (0)
  84
  85void flush_cache_page(struct vm_area_struct *vma, unsigned long vmaddr, unsigned long pfn);
  86void 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 */
  90void flush_dcache_page_asm(unsigned long phys_addr, unsigned long vaddr);
  91
  92#define ARCH_HAS_FLUSH_ANON_PAGE
  93static inline void
  94flush_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
 108static inline void *kmap(struct page *page)
 109{
 110        might_sleep();
 111        return page_address(page);
 112}
 113
 114static inline void kunmap(struct page *page)
 115{
 116        flush_kernel_dcache_page_addr(page_address(page));
 117}
 118
 119static inline void *kmap_atomic(struct page *page)
 120{
 121        preempt_disable();
 122        pagefault_disable();
 123        return page_address(page);
 124}
 125
 126static 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
 138