1 | // SPDX-License-Identifier: GPL-2.0 |
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2 | // Copyright (C) 2018 Hangzhou C-SKY Microsystems co.,ltd. |
3 | |
4 | #include <linux/module.h> |
5 | #include <linux/highmem.h> |
6 | #include <linux/smp.h> |
7 | #include <linux/memblock.h> |
8 | #include <asm/fixmap.h> |
9 | #include <asm/tlbflush.h> |
10 | #include <asm/cacheflush.h> |
11 | |
12 | unsigned long highstart_pfn, highend_pfn; |
13 | |
14 | void kmap_flush_tlb(unsigned long addr) |
15 | { |
16 | flush_tlb_one(addr); |
17 | } |
18 | EXPORT_SYMBOL(kmap_flush_tlb); |
19 | |
20 | void __init kmap_init(void) |
21 | { |
22 | unsigned long vaddr; |
23 | pgd_t *pgd; |
24 | pmd_t *pmd; |
25 | pud_t *pud; |
26 | pte_t *pte; |
27 | |
28 | vaddr = PKMAP_BASE; |
29 | fixrange_init(vaddr, vaddr + PAGE_SIZE*LAST_PKMAP, swapper_pg_dir); |
30 | |
31 | pgd = swapper_pg_dir + pgd_index(vaddr); |
32 | pud = (pud_t *)pgd; |
33 | pmd = pmd_offset(pud, address: vaddr); |
34 | pte = pte_offset_kernel(pmd, address: vaddr); |
35 | pkmap_page_table = pte; |
36 | } |
37 |