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| 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 | |
| 42 | extern void kmap_init(void); |
| 43 | |
| 44 | #define arch_kmap_local_post_unmap(vaddr) \ |
| 45 | local_flush_tlb_kernel_range(vaddr, vaddr + PAGE_SIZE) |
| 46 | |
| 47 | static inline void flush_cache_kmaps(void) |
| 48 | { |
| 49 | flush_cache_all(); |
| 50 | } |
| 51 | #endif |
| 52 | |
| 53 | #endif |
| 54 |
Warning: This file is not a C or C++ file. It does not have highlighting.