19e5c33d7SMark Salter #ifndef _ASM_EARLY_IOREMAP_H_ 29e5c33d7SMark Salter #define _ASM_EARLY_IOREMAP_H_ 39e5c33d7SMark Salter 49e5c33d7SMark Salter #include <linux/types.h> 59e5c33d7SMark Salter 69e5c33d7SMark Salter /* 79e5c33d7SMark Salter * early_ioremap() and early_iounmap() are for temporary early boot-time 89e5c33d7SMark Salter * mappings, before the real ioremap() is functional. 99e5c33d7SMark Salter */ 109e5c33d7SMark Salter extern void __iomem *early_ioremap(resource_size_t phys_addr, 119e5c33d7SMark Salter unsigned long size); 129e5c33d7SMark Salter extern void *early_memremap(resource_size_t phys_addr, 139e5c33d7SMark Salter unsigned long size); 149e5c33d7SMark Salter extern void early_iounmap(void __iomem *addr, unsigned long size); 159e5c33d7SMark Salter extern void early_memunmap(void *addr, unsigned long size); 169e5c33d7SMark Salter 179e5c33d7SMark Salter /* 189e5c33d7SMark Salter * Weak function called by early_ioremap_reset(). It does nothing, but 199e5c33d7SMark Salter * architectures may provide their own version to do any needed cleanups. 209e5c33d7SMark Salter */ 219e5c33d7SMark Salter extern void early_ioremap_shutdown(void); 229e5c33d7SMark Salter 239e5c33d7SMark Salter #if defined(CONFIG_GENERIC_EARLY_IOREMAP) && defined(CONFIG_MMU) 249e5c33d7SMark Salter /* Arch-specific initialization */ 259e5c33d7SMark Salter extern void early_ioremap_init(void); 269e5c33d7SMark Salter 279e5c33d7SMark Salter /* Generic initialization called by architecture code */ 289e5c33d7SMark Salter extern void early_ioremap_setup(void); 299e5c33d7SMark Salter 309e5c33d7SMark Salter /* 319e5c33d7SMark Salter * Called as last step in paging_init() so library can act 329e5c33d7SMark Salter * accordingly for subsequent map/unmap requests. 339e5c33d7SMark Salter */ 349e5c33d7SMark Salter extern void early_ioremap_reset(void); 359e5c33d7SMark Salter 366b0f68e3SMark Salter /* 376b0f68e3SMark Salter * Early copy from unmapped memory to kernel mapped memory. 386b0f68e3SMark Salter */ 396b0f68e3SMark Salter extern void copy_from_early_mem(void *dest, phys_addr_t src, 406b0f68e3SMark Salter unsigned long size); 416b0f68e3SMark Salter 429e5c33d7SMark Salter #else 439e5c33d7SMark Salter static inline void early_ioremap_init(void) { } 449e5c33d7SMark Salter static inline void early_ioremap_setup(void) { } 459e5c33d7SMark Salter static inline void early_ioremap_reset(void) { } 469e5c33d7SMark Salter #endif 479e5c33d7SMark Salter 489e5c33d7SMark Salter #endif /* _ASM_EARLY_IOREMAP_H_ */ 49