162306a36Sopenharmony_ci/* SPDX-License-Identifier: GPL-2.0 */ 262306a36Sopenharmony_ci#ifndef _ASM_EARLY_IOREMAP_H_ 362306a36Sopenharmony_ci#define _ASM_EARLY_IOREMAP_H_ 462306a36Sopenharmony_ci 562306a36Sopenharmony_ci#include <linux/types.h> 662306a36Sopenharmony_ci 762306a36Sopenharmony_ci/* 862306a36Sopenharmony_ci * early_ioremap() and early_iounmap() are for temporary early boot-time 962306a36Sopenharmony_ci * mappings, before the real ioremap() is functional. 1062306a36Sopenharmony_ci */ 1162306a36Sopenharmony_ciextern void __iomem *early_ioremap(resource_size_t phys_addr, 1262306a36Sopenharmony_ci unsigned long size); 1362306a36Sopenharmony_ciextern void *early_memremap(resource_size_t phys_addr, 1462306a36Sopenharmony_ci unsigned long size); 1562306a36Sopenharmony_ciextern void *early_memremap_ro(resource_size_t phys_addr, 1662306a36Sopenharmony_ci unsigned long size); 1762306a36Sopenharmony_ciextern void *early_memremap_prot(resource_size_t phys_addr, 1862306a36Sopenharmony_ci unsigned long size, unsigned long prot_val); 1962306a36Sopenharmony_ciextern void early_iounmap(void __iomem *addr, unsigned long size); 2062306a36Sopenharmony_ciextern void early_memunmap(void *addr, unsigned long size); 2162306a36Sopenharmony_ci 2262306a36Sopenharmony_ci#if defined(CONFIG_GENERIC_EARLY_IOREMAP) && defined(CONFIG_MMU) 2362306a36Sopenharmony_ci/* Arch-specific initialization */ 2462306a36Sopenharmony_ciextern void early_ioremap_init(void); 2562306a36Sopenharmony_ci 2662306a36Sopenharmony_ci/* Generic initialization called by architecture code */ 2762306a36Sopenharmony_ciextern void early_ioremap_setup(void); 2862306a36Sopenharmony_ci 2962306a36Sopenharmony_ci/* 3062306a36Sopenharmony_ci * Called as last step in paging_init() so library can act 3162306a36Sopenharmony_ci * accordingly for subsequent map/unmap requests. 3262306a36Sopenharmony_ci */ 3362306a36Sopenharmony_ciextern void early_ioremap_reset(void); 3462306a36Sopenharmony_ci 3562306a36Sopenharmony_ci/* 3662306a36Sopenharmony_ci * Early copy from unmapped memory to kernel mapped memory. 3762306a36Sopenharmony_ci */ 3862306a36Sopenharmony_ciextern void copy_from_early_mem(void *dest, phys_addr_t src, 3962306a36Sopenharmony_ci unsigned long size); 4062306a36Sopenharmony_ci 4162306a36Sopenharmony_ci#else 4262306a36Sopenharmony_cistatic inline void early_ioremap_init(void) { } 4362306a36Sopenharmony_cistatic inline void early_ioremap_setup(void) { } 4462306a36Sopenharmony_cistatic inline void early_ioremap_reset(void) { } 4562306a36Sopenharmony_ci#endif 4662306a36Sopenharmony_ci 4762306a36Sopenharmony_ci#endif /* _ASM_EARLY_IOREMAP_H_ */ 48