tjh.dev
Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel
os
linux
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
9void 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
20void 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
32void 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 void *va;
38
39 if (!(vma->vm_flags & VM_EXEC))
40 return;
41
42 pfn = pte_pfn(*pte);
43 if (unlikely(!pfn_valid(pfn)))
44 return;
45
46 page = pfn_to_page(pfn);
47 if (page == ZERO_PAGE(0))
48 return;
49
50 va = page_address(page);
51 addr = (unsigned long) va;
52
53 if (va == NULL && PageHighMem(page))
54 addr = (unsigned long) kmap_atomic(page);
55
56 cache_wbinv_range(addr, addr + PAGE_SIZE);
57
58 if (va == NULL && PageHighMem(page))
59 kunmap_atomic((void *) addr);
60}