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 */
11extern void __iomem *early_ioremap(resource_size_t phys_addr,
12 unsigned long size);
13extern void *early_memremap(resource_size_t phys_addr,
14 unsigned long size);
15extern void *early_memremap_ro(resource_size_t phys_addr,
16 unsigned long size);
17extern void *early_memremap_prot(resource_size_t phys_addr,
18 unsigned long size, unsigned long prot_val);
19extern void early_iounmap(void __iomem *addr, unsigned long size);
20extern void early_memunmap(void *addr, unsigned long size);
21
22#if defined(CONFIG_GENERIC_EARLY_IOREMAP) && defined(CONFIG_MMU)
23/* Arch-specific initialization */
24extern void early_ioremap_init(void);
25
26/* Generic initialization called by architecture code */
27extern 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 */
33extern void early_ioremap_reset(void);
34
35/*
36 * Early copy from unmapped memory to kernel mapped memory.
37 */
38extern int copy_from_early_mem(void *dest, phys_addr_t src,
39 unsigned long size);
40
41#else
42static inline void early_ioremap_init(void) { }
43static inline void early_ioremap_setup(void) { }
44static inline void early_ioremap_reset(void) { }
45#endif
46
47#endif /* _ASM_EARLY_IOREMAP_H_ */
48