1/* SPDX-License-Identifier: GPL-2.0-only */ 2/* 3 * Copyright (C) 2015 Synopsys, Inc. (www.synopsys.com) 4 */ 5 6#ifndef _ASM_HIGHMEM_H 7#define _ASM_HIGHMEM_H 8 9#ifdef CONFIG_HIGHMEM 10 11#include <uapi/asm/page.h> 12#include <asm/kmap_size.h> 13 14#define FIXMAP_SIZE PGDIR_SIZE 15#define PKMAP_SIZE PGDIR_SIZE 16 17/* start after vmalloc area */ 18#define FIXMAP_BASE (PAGE_OFFSET - FIXMAP_SIZE - PKMAP_SIZE) 19 20#define FIX_KMAP_SLOTS (KM_MAX_IDX * NR_CPUS) 21#define FIX_KMAP_BEGIN (0UL) 22#define FIX_KMAP_END ((FIX_KMAP_BEGIN + FIX_KMAP_SLOTS) - 1) 23 24#define FIXADDR_TOP (FIXMAP_BASE + (FIX_KMAP_END << PAGE_SHIFT)) 25 26/* 27 * This should be converted to the asm-generic version, but of course this 28 * is needlessly different from all other architectures. Sigh - tglx 29 */ 30#define __fix_to_virt(x) (FIXADDR_TOP - ((x) << PAGE_SHIFT)) 31#define __virt_to_fix(x) (((FIXADDR_TOP - ((x) & PAGE_MASK))) >> PAGE_SHIFT) 32 33/* start after fixmap area */ 34#define PKMAP_BASE (FIXMAP_BASE + FIXMAP_SIZE) 35#define LAST_PKMAP (PKMAP_SIZE >> PAGE_SHIFT) 36#define LAST_PKMAP_MASK (LAST_PKMAP - 1) 37#define PKMAP_ADDR(nr) (PKMAP_BASE + ((nr) << PAGE_SHIFT)) 38#define PKMAP_NR(virt) (((virt) - PKMAP_BASE) >> PAGE_SHIFT) 39 40#include <asm/cacheflush.h> 41 42extern void kmap_init(void); 43 44#define arch_kmap_local_post_unmap(vaddr) \ 45 local_flush_tlb_kernel_range(vaddr, vaddr + PAGE_SIZE) 46 47static inline void flush_cache_kmaps(void) 48{ 49 flush_cache_all(); 50} 51#endif 52 53#endif 54