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/*
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 */
26extern void early_ioremap_shutdown(void);
27
28#if defined(CONFIG_GENERIC_EARLY_IOREMAP) && defined(CONFIG_MMU)
29/* Arch-specific initialization */
30extern void early_ioremap_init(void);
31
32/* Generic initialization called by architecture code */
33extern 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 */
39extern void early_ioremap_reset(void);
40
41/*
42 * Early copy from unmapped memory to kernel mapped memory.
43 */
44extern void copy_from_early_mem(void *dest, phys_addr_t src,
45				unsigned long size);
46
47#else
48static inline void early_ioremap_init(void) { }
49static inline void early_ioremap_setup(void) { }
50static inline void early_ioremap_reset(void) { }
51#endif
52
53#endif /* _ASM_EARLY_IOREMAP_H_ */