1 | /* SPDX-License-Identifier: GPL-2.0 */ |
2 | #ifndef _ASM_EARLY_IOREMAP_H_ |
3 | #define _ASM_EARLY_IOREMAP_H_ |
4 | |
5 | #include <linux/types.h> |
6 | |
7 | /* |
8 | * early_ioremap() and early_iounmap() are for temporary early boot-time |
9 | * mappings, before the real ioremap() is functional. |
10 | */ |
11 | extern void __iomem *early_ioremap(resource_size_t phys_addr, |
12 | unsigned long size); |
13 | extern void *early_memremap(resource_size_t phys_addr, |
14 | unsigned long size); |
15 | extern void *early_memremap_ro(resource_size_t phys_addr, |
16 | unsigned long size); |
17 | extern void *early_memremap_prot(resource_size_t phys_addr, |
18 | unsigned long size, unsigned long prot_val); |
19 | extern void early_iounmap(void __iomem *addr, unsigned long size); |
20 | extern void early_memunmap(void *addr, unsigned long size); |
21 | |
22 | #if defined(CONFIG_GENERIC_EARLY_IOREMAP) && defined(CONFIG_MMU) |
23 | /* Arch-specific initialization */ |
24 | extern void early_ioremap_init(void); |
25 | |
26 | /* Generic initialization called by architecture code */ |
27 | extern void early_ioremap_setup(void); |
28 | |
29 | /* |
30 | * Called as last step in paging_init() so library can act |
31 | * accordingly for subsequent map/unmap requests. |
32 | */ |
33 | extern void early_ioremap_reset(void); |
34 | |
35 | /* |
36 | * Early copy from unmapped memory to kernel mapped memory. |
37 | */ |
38 | extern void copy_from_early_mem(void *dest, phys_addr_t src, |
39 | unsigned long size); |
40 | |
41 | #else |
42 | static inline void early_ioremap_init(void) { } |
43 | static inline void early_ioremap_setup(void) { } |
44 | static inline void early_ioremap_reset(void) { } |
45 | #endif |
46 | |
47 | #endif /* _ASM_EARLY_IOREMAP_H_ */ |
48 | |