| 1 | // SPDX-License-Identifier: GPL-2.0 |
|---|---|
| 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 |