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_iounmap(void __iomem *addr, unsigned long size); 17 extern void early_memunmap(void *addr, unsigned long size); 18 19 /* 20 * Weak function called by early_ioremap_reset(). It does nothing, but 21 * architectures may provide their own version to do any needed cleanups. 22 */ 23 extern void early_ioremap_shutdown(void); 24 25 #if defined(CONFIG_GENERIC_EARLY_IOREMAP) && defined(CONFIG_MMU) 26 /* Arch-specific initialization */ 27 extern void early_ioremap_init(void); 28 29 /* Generic initialization called by architecture code */ 30 extern void early_ioremap_setup(void); 31 32 /* 33 * Called as last step in paging_init() so library can act 34 * accordingly for subsequent map/unmap requests. 35 */ 36 extern void early_ioremap_reset(void); 37 38 /* 39 * Early copy from unmapped memory to kernel mapped memory. 40 */ 41 extern void copy_from_early_mem(void *dest, phys_addr_t src, 42 unsigned long size); 43 44 #else 45 static inline void early_ioremap_init(void) { } 46 static inline void early_ioremap_setup(void) { } 47 static inline void early_ioremap_reset(void) { } 48 #endif 49 50 #endif /* _ASM_EARLY_IOREMAP_H_ */ 51