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b2441318 | 1 | /* SPDX-License-Identifier: GPL-2.0 */ |
9e5c33d7 MS |
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); | |
2592dbbb JG |
15 | extern void *early_memremap_ro(resource_size_t phys_addr, |
16 | unsigned long size); | |
f88a68fa TL |
17 | extern void *early_memremap_prot(resource_size_t phys_addr, |
18 | unsigned long size, unsigned long prot_val); | |
9e5c33d7 MS |
19 | extern void early_iounmap(void __iomem *addr, unsigned long size); |
20 | extern void early_memunmap(void *addr, unsigned long size); | |
21 | ||
22 | /* | |
23 | * Weak function called by early_ioremap_reset(). It does nothing, but | |
24 | * architectures may provide their own version to do any needed cleanups. | |
25 | */ | |
26 | extern void early_ioremap_shutdown(void); | |
27 | ||
28 | #if defined(CONFIG_GENERIC_EARLY_IOREMAP) && defined(CONFIG_MMU) | |
29 | /* Arch-specific initialization */ | |
30 | extern void early_ioremap_init(void); | |
31 | ||
32 | /* Generic initialization called by architecture code */ | |
33 | extern void early_ioremap_setup(void); | |
34 | ||
35 | /* | |
36 | * Called as last step in paging_init() so library can act | |
37 | * accordingly for subsequent map/unmap requests. | |
38 | */ | |
39 | extern void early_ioremap_reset(void); | |
40 | ||
6b0f68e3 MS |
41 | /* |
42 | * Early copy from unmapped memory to kernel mapped memory. | |
43 | */ | |
44 | extern void copy_from_early_mem(void *dest, phys_addr_t src, | |
45 | unsigned long size); | |
46 | ||
9e5c33d7 MS |
47 | #else |
48 | static inline void early_ioremap_init(void) { } | |
49 | static inline void early_ioremap_setup(void) { } | |
50 | static inline void early_ioremap_reset(void) { } | |
51 | #endif | |
52 | ||
53 | #endif /* _ASM_EARLY_IOREMAP_H_ */ |