LXR linux/include/asm-generic/early

   1/* SPDX-License-Identifier: GPL-2.0 */
   2#ifndef _ASM_EARLY_IOREMAP_H_
   3#define _ASM_EARLY_IOREMAP_H_
   4
   5#include <linux/types.h>
   6
   7/*
   8 * early_ioremap() and early_iounmap() are for temporary early boot-time
   9 * mappings, before the real ioremap() is functional.
  10 */
  11extern void __iomem *early_ioremap(resource_size_t phys_addr,
  12                                   unsigned long size);
  13extern void *early_memremap(resource_size_t phys_addr,
  14                            unsigned long size);
  15extern void *early_memremap_ro(resource_size_t phys_addr,
  16                               unsigned long size);
  17extern void *early_memremap_prot(resource_size_t phys_addr,
  18                                 unsigned long size, unsigned long prot_val);
  19extern void early_iounmap(void __iomem *addr, unsigned long size);
  20extern void early_memunmap(void *addr, unsigned long size);
  21
  22#if defined(CONFIG_GENERIC_EARLY_IOREMAP) && defined(CONFIG_MMU)
  23/* Arch-specific initialization */
  24extern void early_ioremap_init(void);
  25
  26/* Generic initialization called by architecture code */
  27extern void early_ioremap_setup(void);
  28
  29/*
  30 * Called as last step in paging_init() so library can act
  31 * accordingly for subsequent map/unmap requests.
  32 */
  33extern void early_ioremap_reset(void);
  34
  35/*
  36 * Early copy from unmapped memory to kernel mapped memory.
  37 */
  38extern void copy_from_early_mem(void *dest, phys_addr_t src,
  39                                unsigned long size);
  40
  41#else
  42static inline void early_ioremap_init(void) { }
  43static inline void early_ioremap_setup(void) { }
  44static inline void early_ioremap_reset(void) { }
  45#endif
  46
  47#endif /* _ASM_EARLY_IOREMAP_H_ */
  48