Contributors: 1
| Author |
Tokens |
Token Proportion |
Commits |
Commit Proportion |
| Guo Ren |
272 |
100.00% |
1 |
100.00% |
| Total |
272 |
|
1 |
|
// SPDX-License-Identifier: GPL-2.0
// Copyright (C) 2018 Hangzhou C-SKY Microsystems co.,ltd.
#include <linux/cache.h>
#include <linux/highmem.h>
#include <linux/mm.h>
#include <asm/cache.h>
void flush_icache_page(struct vm_area_struct *vma, struct page *page)
{
unsigned long start;
start = (unsigned long) kmap_atomic(page);
cache_wbinv_range(start, start + PAGE_SIZE);
kunmap_atomic((void *)start);
}
void flush_icache_user_range(struct vm_area_struct *vma, struct page *page,
unsigned long vaddr, int len)
{
unsigned long kaddr;
kaddr = (unsigned long) kmap_atomic(page) + (vaddr & ~PAGE_MASK);
cache_wbinv_range(kaddr, kaddr + len);
kunmap_atomic((void *)kaddr);
}
void update_mmu_cache(struct vm_area_struct *vma, unsigned long address,
pte_t *pte)
{
unsigned long addr, pfn;
struct page *page;
void *va;
if (!(vma->vm_flags & VM_EXEC))
return;
pfn = pte_pfn(*pte);
if (unlikely(!pfn_valid(pfn)))
return;
page = pfn_to_page(pfn);
if (page == ZERO_PAGE(0))
return;
va = page_address(page);
addr = (unsigned long) va;
if (va == NULL && PageHighMem(page))
addr = (unsigned long) kmap_atomic(page);
cache_wbinv_range(addr, addr + PAGE_SIZE);
if (va == NULL && PageHighMem(page))
kunmap_atomic((void *) addr);
}