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