projects / deliverable / linux.git / blame
| Commit | Line | Data |
|---|---|---|
| 5f0fbf9e NP |
1 | #ifndef _ASM_FIXMAP_H |
| 2 | #define _ASM_FIXMAP_H | |
| 3 | ||
| a05e54c1 | 4 | #define FIXADDR_START 0xffc00000UL |
| 836a2418 | 5 | #define FIXADDR_END 0xfff00000UL |
| b615bbbf | 6 | #define FIXADDR_TOP (FIXADDR_END - PAGE_SIZE) |
| 5f0fbf9e | 7 | |
| b615bbbf | 8 | #include <asm/kmap_types.h> |
| a5f4c561 | 9 | #include <asm/pgtable.h> |
| 5f0fbf9e | 10 | |
| b615bbbf | 11 | enum fixed_addresses { |
| a5f4c561 SA |
12 | FIX_EARLYCON_MEM_BASE, |
| 13 | __end_of_permanent_fixed_addresses, | |
| 14 | ||
| 15 | FIX_KMAP_BEGIN = __end_of_permanent_fixed_addresses, | |
| b615bbbf | 16 | FIX_KMAP_END = FIX_KMAP_BEGIN + (KM_TYPE_NR * NR_CPUS) - 1, |
| 5f0fbf9e | 17 | |
| ab0615e2 RV |
18 | /* Support writing RO kernel text via kprobes, jump labels, etc. */ |
| 19 | FIX_TEXT_POKE0, | |
| 20 | FIX_TEXT_POKE1, | |
| 21 | ||
| 2937367b AB |
22 | __end_of_fixmap_region, |
| 23 | ||
| 24 | /* | |
| 25 | * Share the kmap() region with early_ioremap(): this is guaranteed | |
| 26 | * not to clash since early_ioremap() is only available before | |
| 27 | * paging_init(), and kmap() only after. | |
| 28 | */ | |
| 29 | #define NR_FIX_BTMAPS 32 | |
| 30 | #define FIX_BTMAPS_SLOTS 7 | |
| 31 | #define TOTAL_FIX_BTMAPS (NR_FIX_BTMAPS * FIX_BTMAPS_SLOTS) | |
| 32 | ||
| 33 | FIX_BTMAP_END = __end_of_permanent_fixed_addresses, | |
| 34 | FIX_BTMAP_BEGIN = FIX_BTMAP_END + TOTAL_FIX_BTMAPS - 1, | |
| 35 | __end_of_early_ioremap_region | |
| b615bbbf | 36 | }; |
| 5f0fbf9e | 37 | |
| 2937367b AB |
38 | static const enum fixed_addresses __end_of_fixed_addresses = |
| 39 | __end_of_fixmap_region > __end_of_early_ioremap_region ? | |
| 40 | __end_of_fixmap_region : __end_of_early_ioremap_region; | |
| 41 | ||
| a5f4c561 SA |
42 | #define FIXMAP_PAGE_COMMON (L_PTE_YOUNG | L_PTE_PRESENT | L_PTE_XN | L_PTE_DIRTY) |
| 43 | ||
| 44 | #define FIXMAP_PAGE_NORMAL (FIXMAP_PAGE_COMMON | L_PTE_MT_WRITEBACK) | |
| 2937367b | 45 | #define FIXMAP_PAGE_RO (FIXMAP_PAGE_NORMAL | L_PTE_RDONLY) |
| a5f4c561 SA |
46 | |
| 47 | /* Used by set_fixmap_(io|nocache), both meant for mapping a device */ | |
| 48 | #define FIXMAP_PAGE_IO (FIXMAP_PAGE_COMMON | L_PTE_MT_DEV_SHARED | L_PTE_SHARED) | |
| 49 | #define FIXMAP_PAGE_NOCACHE FIXMAP_PAGE_IO | |
| 50 | ||
| 2937367b AB |
51 | #define __early_set_fixmap __set_fixmap |
| 52 | ||
| 53 | #ifdef CONFIG_MMU | |
| 54 | ||
| 99b4ac9a | 55 | void __set_fixmap(enum fixed_addresses idx, phys_addr_t phys, pgprot_t prot); |
| a5f4c561 | 56 | void __init early_fixmap_init(void); |
| 99b4ac9a | 57 | |
| b615bbbf | 58 | #include <asm-generic/fixmap.h> |
| 5f0fbf9e | 59 | |
| 2937367b AB |
60 | #else |
| 61 | ||
| 62 | static inline void early_fixmap_init(void) { } | |
| 63 | ||
| 64 | #endif | |
| 5f0fbf9e | 65 | #endif |