1 /* SPDX-License-Identifier: GPL-2.0 */
2 #ifndef _ASM_EARLY_IOREMAP_H_
3 #define _ASM_EARLY_IOREMAP_H_
5 #include <linux/types.h>
8 * early_ioremap() and early_iounmap() are for temporary early boot-time
9 * mappings, before the real ioremap() is functional.
11 extern void __iomem *early_ioremap(resource_size_t phys_addr,
13 extern void *early_memremap(resource_size_t phys_addr,
15 extern void *early_memremap_ro(resource_size_t phys_addr,
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);
23 * Weak function called by early_ioremap_reset(). It does nothing, but
24 * architectures may provide their own version to do any needed cleanups.
26 extern void early_ioremap_shutdown(void);
28 #if defined(CONFIG_GENERIC_EARLY_IOREMAP) && defined(CONFIG_MMU)
29 /* Arch-specific initialization */
30 extern void early_ioremap_init(void);
32 /* Generic initialization called by architecture code */
33 extern void early_ioremap_setup(void);
36 * Called as last step in paging_init() so library can act
37 * accordingly for subsequent map/unmap requests.
39 extern void early_ioremap_reset(void);
42 * Early copy from unmapped memory to kernel mapped memory.
44 extern void copy_from_early_mem(void *dest, phys_addr_t src,
48 static inline void early_ioremap_init(void) { }
49 static inline void early_ioremap_setup(void) { }
50 static inline void early_ioremap_reset(void) { }
53 #endif /* _ASM_EARLY_IOREMAP_H_ */