1 #ifndef _ASM_EARLY_IOREMAP_H_ 2 #define _ASM_EARLY_IOREMAP_H_ 3 4 #include <linux/types.h> 5 6 /* 7 * early_ioremap() and early_iounmap() are for temporary early boot-time 8 * mappings, before the real ioremap() is functional. 9 */ 10 extern void __iomem *early_ioremap(resource_size_t phys_addr, 11 unsigned long size); 12 extern void *early_memremap(resource_size_t phys_addr, 13 unsigned long size); 14 extern void *early_memremap_ro(resource_size_t phys_addr, 15 unsigned long size); 16 extern void *early_memremap_prot(resource_size_t phys_addr, 17 unsigned long size, unsigned long prot_val); 18 extern void early_iounmap(void __iomem *addr, unsigned long size); 19 extern void early_memunmap(void *addr, unsigned long size); 20 21 /* 22 * Weak function called by early_ioremap_reset(). It does nothing, but 23 * architectures may provide their own version to do any needed cleanups. 24 */ 25 extern void early_ioremap_shutdown(void); 26 27 #if defined(CONFIG_GENERIC_EARLY_IOREMAP) && defined(CONFIG_MMU) 28 /* Arch-specific initialization */ 29 extern void early_ioremap_init(void); 30 31 /* Generic initialization called by architecture code */ 32 extern void early_ioremap_setup(void); 33 34 /* 35 * Called as last step in paging_init() so library can act 36 * accordingly for subsequent map/unmap requests. 37 */ 38 extern void early_ioremap_reset(void); 39 40 /* 41 * Early copy from unmapped memory to kernel mapped memory. 42 */ 43 extern void copy_from_early_mem(void *dest, phys_addr_t src, 44 unsigned long size); 45 46 #else 47 static inline void early_ioremap_init(void) { } 48 static inline void early_ioremap_setup(void) { } 49 static inline void early_ioremap_reset(void) { } 50 #endif 51 52 #endif /* _ASM_EARLY_IOREMAP_H_ */ 53