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, vaddr); 34 pte = pte_offset_kernel(pmd, vaddr); 35 pkmap_page_table = pte; 36 } 37