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