/* SPDX-License-Identifier: GPL-2.0 */

  #ifndef _ASM_EARLY_IOREMAP_H_
  #define _ASM_EARLY_IOREMAP_H_
  
  #include <linux/types.h>
  
  /*
   * early_ioremap() and early_iounmap() are for temporary early boot-time
   * mappings, before the real ioremap() is functional.
   */
  extern void __iomem *early_ioremap(resource_size_t phys_addr,
  				   unsigned long size);
  extern void *early_memremap(resource_size_t phys_addr,
  			    unsigned long size);

  extern void *early_memremap_ro(resource_size_t phys_addr,
  			       unsigned long size);

  extern void *early_memremap_prot(resource_size_t phys_addr,
  				 unsigned long size, unsigned long prot_val);

  extern void early_iounmap(void __iomem *addr, unsigned long size);
  extern void early_memunmap(void *addr, unsigned long size);
  
  /*
   * Weak function called by early_ioremap_reset(). It does nothing, but
   * architectures may provide their own version to do any needed cleanups.
   */
  extern void early_ioremap_shutdown(void);
  
  #if defined(CONFIG_GENERIC_EARLY_IOREMAP) && defined(CONFIG_MMU)
  /* Arch-specific initialization */
  extern void early_ioremap_init(void);
  
  /* Generic initialization called by architecture code */
  extern void early_ioremap_setup(void);
  
  /*
   * Called as last step in paging_init() so library can act
   * accordingly for subsequent map/unmap requests.
   */
  extern void early_ioremap_reset(void);

  /*
   * Early copy from unmapped memory to kernel mapped memory.
   */
  extern void copy_from_early_mem(void *dest, phys_addr_t src,
  				unsigned long size);

  #else
  static inline void early_ioremap_init(void) { }
  static inline void early_ioremap_setup(void) { }
  static inline void early_ioremap_reset(void) { }
  #endif
  
  #endif /* _ASM_EARLY_IOREMAP_H_ */