io.h 2.3 KB

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  1. /*
  2. * Copyright (C) 2006 Atmel Corporation
  3. *
  4. * SPDX-License-Identifier: GPL-2.0+
  5. */
  6. #ifndef __ASM_AVR32_IO_H
  7. #define __ASM_AVR32_IO_H
  8. #include <asm/types.h>
  9. #ifdef __KERNEL__
  10. /*
  11. * Generic IO read/write. These perform native-endian accesses. Note
  12. * that some architectures will want to re-define __raw_{read,write}w.
  13. */
  14. extern void __raw_writesb(unsigned int addr, const void *data, int bytelen);
  15. extern void __raw_writesw(unsigned int addr, const void *data, int wordlen);
  16. extern void __raw_writesl(unsigned int addr, const void *data, int longlen);
  17. extern void __raw_readsb(unsigned int addr, void *data, int bytelen);
  18. extern void __raw_readsw(unsigned int addr, void *data, int wordlen);
  19. extern void __raw_readsl(unsigned int addr, void *data, int longlen);
  20. #define __raw_writeb(v,a) (*(volatile unsigned char *)(a) = (v))
  21. #define __raw_writew(v,a) (*(volatile unsigned short *)(a) = (v))
  22. #define __raw_writel(v,a) (*(volatile unsigned int *)(a) = (v))
  23. #define __raw_readb(a) (*(volatile unsigned char *)(a))
  24. #define __raw_readw(a) (*(volatile unsigned short *)(a))
  25. #define __raw_readl(a) (*(volatile unsigned int *)(a))
  26. /* As long as I/O is only performed in P4 (or possibly P3), we're safe */
  27. #define writeb(v,a) __raw_writeb(v,a)
  28. #define writew(v,a) __raw_writew(v,a)
  29. #define writel(v,a) __raw_writel(v,a)
  30. #define readb(a) __raw_readb(a)
  31. #define readw(a) __raw_readw(a)
  32. #define readl(a) __raw_readl(a)
  33. /*
  34. * Bad read/write accesses...
  35. */
  36. extern void __readwrite_bug(const char *fn);
  37. #define IO_SPACE_LIMIT 0xffffffff
  38. /*
  39. * All I/O is memory mapped, so these macros doesn't make very much sense
  40. */
  41. #define outb(v,p) __raw_writeb(v, p)
  42. #define outw(v,p) __raw_writew(cpu_to_le16(v),p)
  43. #define outl(v,p) __raw_writel(cpu_to_le32(v),p)
  44. #define inb(p) ({ unsigned int __v = __raw_readb(p); __v; })
  45. #define inw(p) ({ unsigned int __v = __le16_to_cpu(__raw_readw(p)); __v; })
  46. #define inl(p) ({ unsigned int __v = __le32_to_cpu(__raw_readl(p)); __v; })
  47. #include <asm/arch/addrspace.h>
  48. /* Provides virt_to_phys, phys_to_virt, cached, uncached, map_physmem */
  49. #endif /* __KERNEL__ */
  50. static inline void sync(void)
  51. {
  52. }
  53. /*
  54. * Take down a mapping set up by map_physmem().
  55. */
  56. static inline void unmap_physmem(void *vaddr, unsigned long len)
  57. {
  58. }
  59. #endif /* __ASM_AVR32_IO_H */