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_fixed_addresses 23 }; 24 25 #define FIXMAP_PAGE_COMMON (L_PTE_YOUNG | L_PTE_PRESENT | L_PTE_XN | L_PTE_DIRTY) 26 27 #define FIXMAP_PAGE_NORMAL (FIXMAP_PAGE_COMMON | L_PTE_MT_WRITEBACK) 28 29 /* Used by set_fixmap_(io|nocache), both meant for mapping a device */ 30 #define FIXMAP_PAGE_IO (FIXMAP_PAGE_COMMON | L_PTE_MT_DEV_SHARED | L_PTE_SHARED) 31 #define FIXMAP_PAGE_NOCACHE FIXMAP_PAGE_IO 32 33 void __set_fixmap(enum fixed_addresses idx, phys_addr_t phys, pgprot_t prot); 34 void __init early_fixmap_init(void); 35 36 #include <asm-generic/fixmap.h> 37 38 #endif 39