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_memremap_ro(resource_size_t phys_addr,
  15                                unsigned long size);
  16 extern void early_iounmap(void __iomem *addr, unsigned long size);
  17 extern void early_memunmap(void *addr, unsigned long size);
  18
  19 /*
  20  * Weak function called by early_ioremap_reset(). It does nothing, but
  21  * architectures may provide their own version to do any needed cleanups.
  22  */
  23 extern void early_ioremap_shutdown(void);
  24
  25 #if defined(CONFIG_GENERIC_EARLY_IOREMAP) && defined(CONFIG_MMU)
  26 /* Arch-specific initialization */
  27 extern void early_ioremap_init(void);
  28
  29 /* Generic initialization called by architecture code */
  30 extern void early_ioremap_setup(void);
  31
  32 /*
  33  * Called as last step in paging_init() so library can act
  34  * accordingly for subsequent map/unmap requests.
  35  */
  36 extern void early_ioremap_reset(void);
  37
  38 /*
  39  * Early copy from unmapped memory to kernel mapped memory.
  40  */
  41 extern void copy_from_early_mem(void *dest, phys_addr_t src,
  42                                 unsigned long size);
  43
  44 #else
  45 static inline void early_ioremap_init(void) { }
  46 static inline void early_ioremap_setup(void) { }
  47 static inline void early_ioremap_reset(void) { }
  48 #endif
  49
  50 #endif /* _ASM_EARLY_IOREMAP_H_ */