root/arch/csky/abiv2/cacheflush.c

DEFINITIONS

1. flush_icache_page
2. flush_icache_user_range
3. update_mmu_cache

   1 // SPDX-License-Identifier: GPL-2.0
   2 // Copyright (C) 2018 Hangzhou C-SKY Microsystems co.,ltd.
   3 
   4 #include <linux/cache.h>
   5 #include <linux/highmem.h>
   6 #include <linux/mm.h>
   7 #include <asm/cache.h>
   8 
   9 void flush_icache_page(struct vm_area_struct *vma, struct page *page)
  10 {
  11         unsigned long start;
  12 
  13         start = (unsigned long) kmap_atomic(page);
  14 
  15         cache_wbinv_range(start, start + PAGE_SIZE);
  16 
  17         kunmap_atomic((void *)start);
  18 }
  19 
  20 void flush_icache_user_range(struct vm_area_struct *vma, struct page *page,
  21                              unsigned long vaddr, int len)
  22 {
  23         unsigned long kaddr;
  24 
  25         kaddr = (unsigned long) kmap_atomic(page) + (vaddr & ~PAGE_MASK);
  26 
  27         cache_wbinv_range(kaddr, kaddr + len);
  28 
  29         kunmap_atomic((void *)kaddr);
  30 }
  31 
  32 void update_mmu_cache(struct vm_area_struct *vma, unsigned long address,
  33                       pte_t *pte)
  34 {
  35         unsigned long addr, pfn;
  36         struct page *page;
  37 
  38         pfn = pte_pfn(*pte);
  39         if (unlikely(!pfn_valid(pfn)))
  40                 return;
  41 
  42         page = pfn_to_page(pfn);
  43         if (page == ZERO_PAGE(0))
  44                 return;
  45 
  46         addr = (unsigned long) kmap_atomic(page);
  47 
  48         cache_wbinv_range(addr, addr + PAGE_SIZE);
  49 
  50         kunmap_atomic((void *) addr);
  51 }