1 #ifndef _ASM_FIXMAP_H 2 #define _ASM_FIXMAP_H 3 4 #define FIXADDR_START 0xffc00000UL 5 #define FIXADDR_END 0xfff00000UL 6 #define FIXADDR_TOP (FIXADDR_END - PAGE_SIZE) 7 8 #include <asm/kmap_types.h> 9 #include <asm/pgtable.h> 10 11 enum fixed_addresses { 12 FIX_EARLYCON_MEM_BASE, 13 __end_of_permanent_fixed_addresses, 14 15 FIX_KMAP_BEGIN = __end_of_permanent_fixed_addresses, 16 FIX_KMAP_END = FIX_KMAP_BEGIN + (KM_TYPE_NR * NR_CPUS) - 1, 17 18 /* Support writing RO kernel text via kprobes, jump labels, etc. */ 19 FIX_TEXT_POKE0, 20 FIX_TEXT_POKE1, 21 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 36 }; 37 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 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) 45 #define FIXMAP_PAGE_RO (FIXMAP_PAGE_NORMAL | L_PTE_RDONLY) 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 51 #define __early_set_fixmap __set_fixmap 52 53 #ifdef CONFIG_MMU 54 55 void __set_fixmap(enum fixed_addresses idx, phys_addr_t phys, pgprot_t prot); 56 void __init early_fixmap_init(void); 57 58 #include <asm-generic/fixmap.h> 59 60 #else 61 62 static inline void early_fixmap_init(void) { } 63 64 #endif 65 #endif 66