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