diff options
Diffstat (limited to '')
-rw-r--r-- | arch/csky/mm/highmem.c | 36 |
1 files changed, 36 insertions, 0 deletions
diff --git a/arch/csky/mm/highmem.c b/arch/csky/mm/highmem.c new file mode 100644 index 0000000000..4161df3c6c --- /dev/null +++ b/arch/csky/mm/highmem.c @@ -0,0 +1,36 @@ +// SPDX-License-Identifier: GPL-2.0 +// Copyright (C) 2018 Hangzhou C-SKY Microsystems co.,ltd. + +#include <linux/module.h> +#include <linux/highmem.h> +#include <linux/smp.h> +#include <linux/memblock.h> +#include <asm/fixmap.h> +#include <asm/tlbflush.h> +#include <asm/cacheflush.h> + +unsigned long highstart_pfn, highend_pfn; + +void kmap_flush_tlb(unsigned long addr) +{ + flush_tlb_one(addr); +} +EXPORT_SYMBOL(kmap_flush_tlb); + +void __init kmap_init(void) +{ + unsigned long vaddr; + pgd_t *pgd; + pmd_t *pmd; + pud_t *pud; + pte_t *pte; + + vaddr = PKMAP_BASE; + fixrange_init(vaddr, vaddr + PAGE_SIZE*LAST_PKMAP, swapper_pg_dir); + + pgd = swapper_pg_dir + pgd_index(vaddr); + pud = (pud_t *)pgd; + pmd = pmd_offset(pud, vaddr); + pte = pte_offset_kernel(pmd, vaddr); + pkmap_page_table = pte; +} |