| /* SPDX-License-Identifier: GPL-2.0-only */ |
| /* |
| * Copyright (C) 2015 Synopsys, Inc. (www.synopsys.com) |
| */ |
| |
| #ifndef _ASM_HIGHMEM_H |
| #define _ASM_HIGHMEM_H |
| |
| #ifdef CONFIG_HIGHMEM |
| |
| #include <uapi/asm/page.h> |
| #include <asm/kmap_size.h> |
| |
| #define FIXMAP_SIZE PGDIR_SIZE |
| #define PKMAP_SIZE PGDIR_SIZE |
| |
| /* start after vmalloc area */ |
| #define FIXMAP_BASE (PAGE_OFFSET - FIXMAP_SIZE - PKMAP_SIZE) |
| |
| #define FIX_KMAP_SLOTS (KM_MAX_IDX * NR_CPUS) |
| #define FIX_KMAP_BEGIN (0UL) |
| #define FIX_KMAP_END ((FIX_KMAP_BEGIN + FIX_KMAP_SLOTS) - 1) |
| |
| #define FIXADDR_TOP (FIXMAP_BASE + (FIX_KMAP_END << PAGE_SHIFT)) |
| |
| /* |
| * This should be converted to the asm-generic version, but of course this |
| * is needlessly different from all other architectures. Sigh - tglx |
| */ |
| #define __fix_to_virt(x) (FIXADDR_TOP - ((x) << PAGE_SHIFT)) |
| #define __virt_to_fix(x) (((FIXADDR_TOP - ((x) & PAGE_MASK))) >> PAGE_SHIFT) |
| |
| /* start after fixmap area */ |
| #define PKMAP_BASE (FIXMAP_BASE + FIXMAP_SIZE) |
| #define LAST_PKMAP (PKMAP_SIZE >> PAGE_SHIFT) |
| #define LAST_PKMAP_MASK (LAST_PKMAP - 1) |
| #define PKMAP_ADDR(nr) (PKMAP_BASE + ((nr) << PAGE_SHIFT)) |
| #define PKMAP_NR(virt) (((virt) - PKMAP_BASE) >> PAGE_SHIFT) |
| |
| #include <asm/cacheflush.h> |
| |
| extern void kmap_init(void); |
| |
| #define arch_kmap_local_post_unmap(vaddr) \ |
| local_flush_tlb_kernel_range(vaddr, vaddr + PAGE_SIZE) |
| |
| static inline void flush_cache_kmaps(void) |
| { |
| flush_cache_all(); |
| } |
| #endif |
| |
| #endif |