1 // SPDX-License-Identifier: GPL-2.0 1
2 // Copyright (C) 2018 Hangzhou C-SKY Microsyst
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
30
31 pgd = swapper_pg_dir + pgd_index(vaddr
32 pud = (pud_t *)pgd;
33 pmd = pmd_offset(pud, vaddr);
34 pte = pte_offset_kernel(pmd, vaddr);
35 pkmap_page_table = pte;
36 }
37
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