1*4882a593Smuzhiyun /* SPDX-License-Identifier: GPL-2.0-only */ 2*4882a593Smuzhiyun /* 3*4882a593Smuzhiyun * Copyright (C) 2015 Synopsys, Inc. (www.synopsys.com) 4*4882a593Smuzhiyun */ 5*4882a593Smuzhiyun 6*4882a593Smuzhiyun #ifndef _ASM_HIGHMEM_H 7*4882a593Smuzhiyun #define _ASM_HIGHMEM_H 8*4882a593Smuzhiyun 9*4882a593Smuzhiyun #ifdef CONFIG_HIGHMEM 10*4882a593Smuzhiyun 11*4882a593Smuzhiyun #include <uapi/asm/page.h> 12*4882a593Smuzhiyun #include <asm/kmap_types.h> 13*4882a593Smuzhiyun 14*4882a593Smuzhiyun /* start after vmalloc area */ 15*4882a593Smuzhiyun #define FIXMAP_BASE (PAGE_OFFSET - FIXMAP_SIZE - PKMAP_SIZE) 16*4882a593Smuzhiyun #define FIXMAP_SIZE PGDIR_SIZE /* only 1 PGD worth */ 17*4882a593Smuzhiyun #define KM_TYPE_NR ((FIXMAP_SIZE >> PAGE_SHIFT)/NR_CPUS) 18*4882a593Smuzhiyun #define FIXMAP_ADDR(nr) (FIXMAP_BASE + ((nr) << PAGE_SHIFT)) 19*4882a593Smuzhiyun 20*4882a593Smuzhiyun /* start after fixmap area */ 21*4882a593Smuzhiyun #define PKMAP_BASE (FIXMAP_BASE + FIXMAP_SIZE) 22*4882a593Smuzhiyun #define PKMAP_SIZE PGDIR_SIZE 23*4882a593Smuzhiyun #define LAST_PKMAP (PKMAP_SIZE >> PAGE_SHIFT) 24*4882a593Smuzhiyun #define LAST_PKMAP_MASK (LAST_PKMAP - 1) 25*4882a593Smuzhiyun #define PKMAP_ADDR(nr) (PKMAP_BASE + ((nr) << PAGE_SHIFT)) 26*4882a593Smuzhiyun #define PKMAP_NR(virt) (((virt) - PKMAP_BASE) >> PAGE_SHIFT) 27*4882a593Smuzhiyun 28*4882a593Smuzhiyun #include <asm/cacheflush.h> 29*4882a593Smuzhiyun 30*4882a593Smuzhiyun extern void kmap_init(void); 31*4882a593Smuzhiyun flush_cache_kmaps(void)32*4882a593Smuzhiyunstatic inline void flush_cache_kmaps(void) 33*4882a593Smuzhiyun { 34*4882a593Smuzhiyun flush_cache_all(); 35*4882a593Smuzhiyun } 36*4882a593Smuzhiyun 37*4882a593Smuzhiyun #endif 38*4882a593Smuzhiyun 39*4882a593Smuzhiyun #endif 40