include/asm-generic/early_ioremap.h

   1 #ifndef _ASM_EARLY_IOREMAP_H_
   2 #define _ASM_EARLY_IOREMAP_H_
   3
   4 #include <linux/types.h>
   5
   6 /*
   7  * early_ioremap() and early_iounmap() are for temporary early boot-time
   8  * mappings, before the real ioremap() is functional.
   9  */
  10 extern void __iomem *early_ioremap(resource_size_t phys_addr,
  11                                    unsigned long size);
  12 extern void *early_memremap(resource_size_t phys_addr,
  13                             unsigned long size);
  14 extern void early_iounmap(void __iomem *addr, unsigned long size);
  15 extern void early_memunmap(void *addr, unsigned long size);
  16
  17 /*
  18  * Weak function called by early_ioremap_reset(). It does nothing, but
  19  * architectures may provide their own version to do any needed cleanups.
  20  */
  21 extern void early_ioremap_shutdown(void);
  22
  23 #if defined(CONFIG_GENERIC_EARLY_IOREMAP) && defined(CONFIG_MMU)
  24 /* Arch-specific initialization */
  25 extern void early_ioremap_init(void);
  26
  27 /* Generic initialization called by architecture code */
  28 extern void early_ioremap_setup(void);
  29
  30 /*
  31  * Called as last step in paging_init() so library can act
  32  * accordingly for subsequent map/unmap requests.
  33  */
  34 extern void early_ioremap_reset(void);
  35
  36 #else
  37 static inline void early_ioremap_init(void) { }
  38 static inline void early_ioremap_setup(void) { }
  39 static inline void early_ioremap_reset(void) { }
  40 #endif
  41
  42 #endif /* _ASM_EARLY_IOREMAP_H_ */