early_ioremap.h (1501B)
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 void 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_ */