| 1 |
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| 2 | #ifndef _ASM_FIXMAP_H
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| 3 | #define _ASM_FIXMAP_H
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| 4 |
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| 5 | #define FIXADDR_START 0xffc80000UL
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| 6 | #define FIXADDR_END 0xfff00000UL
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| 7 | #define FIXADDR_TOP (FIXADDR_END - PAGE_SIZE)
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| 8 |
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| 9 | #include <linux/pgtable.h>
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| 10 | #include <asm/kmap_size.h>
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| 11 |
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| 12 | enum fixed_addresses {
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| 13 | FIX_EARLYCON_MEM_BASE,
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| 14 | __end_of_permanent_fixed_addresses,
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| 15 |
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| 16 | FIX_KMAP_BEGIN = __end_of_permanent_fixed_addresses,
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| 17 | FIX_KMAP_END = FIX_KMAP_BEGIN + (KM_MAX_IDX * NR_CPUS) - 1,
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| 18 |
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| 19 |
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| 20 | FIX_TEXT_POKE0,
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| 21 | FIX_TEXT_POKE1,
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| 22 |
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| 23 | __end_of_fixmap_region,
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| 24 |
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| 25 | |
| 26 | * Share the kmap() region with early_ioremap(): this is guaranteed
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| 27 | * not to clash since early_ioremap() is only available before
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| 28 | * paging_init(), and kmap() only after.
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| 29 |
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| 30 | #define NR_FIX_BTMAPS 32
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| 31 | #define FIX_BTMAPS_SLOTS 7
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| 32 | #define TOTAL_FIX_BTMAPS (NR_FIX_BTMAPS * FIX_BTMAPS_SLOTS)
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| 33 |
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| 34 | FIX_BTMAP_END = __end_of_permanent_fixed_addresses,
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| 35 | FIX_BTMAP_BEGIN = FIX_BTMAP_END + TOTAL_FIX_BTMAPS - 1,
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| 36 | __end_of_early_ioremap_region
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| 37 | };
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| 38 |
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| 39 | static const enum fixed_addresses __end_of_fixed_addresses =
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| 40 | __end_of_fixmap_region > __end_of_early_ioremap_region ?
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| 41 | __end_of_fixmap_region : __end_of_early_ioremap_region;
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| 42 |
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| 43 | #define FIXMAP_PAGE_COMMON (L_PTE_YOUNG | L_PTE_PRESENT | L_PTE_XN | L_PTE_DIRTY)
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| 44 |
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| 45 | #define FIXMAP_PAGE_NORMAL (pgprot_kernel | L_PTE_XN)
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| 46 | #define FIXMAP_PAGE_RO (FIXMAP_PAGE_NORMAL | L_PTE_RDONLY)
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| 47 |
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| 48 |
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| 49 | #define FIXMAP_PAGE_IO (FIXMAP_PAGE_COMMON | L_PTE_MT_DEV_SHARED | L_PTE_SHARED)
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| 50 | #define FIXMAP_PAGE_NOCACHE FIXMAP_PAGE_IO
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| 51 |
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| 52 | #define __early_set_fixmap __set_fixmap
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| 53 |
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| 54 | #ifdef CONFIG_MMU
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| 55 |
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| 56 | void __set_fixmap(enum fixed_addresses idx, phys_addr_t phys, pgprot_t prot);
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| 57 | void __init early_fixmap_init(void);
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| 58 |
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| 59 | #include <asm-generic/fixmap.h>
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| 60 |
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| 61 | #else
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| 62 |
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| 63 | static inline void early_fixmap_init(void) { }
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| 64 |
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| 65 | #endif
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| 66 | #endif
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