arch/avr32/include/asm/io.h

   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
   9 #include <asm/types.h>
  10
  11 #ifdef __KERNEL__
  12
  13 /*
  14  * Generic IO read/write.  These perform native-endian accesses.  Note
  15  * that some architectures will want to re-define __raw_{read,write}w.
  16  */
  17 extern void __raw_writesb(unsigned int addr, const void *data, int bytelen);
  18 extern void __raw_writesw(unsigned int addr, const void *data, int wordlen);
  19 extern void __raw_writesl(unsigned int addr, const void *data, int longlen);
  20
  21 extern void __raw_readsb(unsigned int addr, void *data, int bytelen);
  22 extern void __raw_readsw(unsigned int addr, void *data, int wordlen);
  23 extern void __raw_readsl(unsigned int addr, void *data, int longlen);
  24
  25 #define __raw_writeb(v,a)       (*(volatile unsigned char  *)(a) = (v))
  26 #define __raw_writew(v,a)       (*(volatile unsigned short *)(a) = (v))
  27 #define __raw_writel(v,a)       (*(volatile unsigned int   *)(a) = (v))
  28
  29 #define __raw_readb(a)          (*(volatile unsigned char  *)(a))
  30 #define __raw_readw(a)          (*(volatile unsigned short *)(a))
  31 #define __raw_readl(a)          (*(volatile unsigned int   *)(a))
  32
  33 /* As long as I/O is only performed in P4 (or possibly P3), we're safe */
  34 #define writeb(v,a)             __raw_writeb(v,a)
  35 #define writew(v,a)             __raw_writew(v,a)
  36 #define writel(v,a)             __raw_writel(v,a)
  37
  38 #define readb(a)                __raw_readb(a)
  39 #define readw(a)                __raw_readw(a)
  40 #define readl(a)                __raw_readl(a)
  41
  42 /*
  43  * Bad read/write accesses...
  44  */
  45 extern void __readwrite_bug(const char *fn);
  46
  47 #define IO_SPACE_LIMIT  0xffffffff
  48
  49 /*
  50  * All I/O is memory mapped, so these macros doesn't make very much sense
  51  */
  52 #define outb(v,p)               __raw_writeb(v, p)
  53 #define outw(v,p)               __raw_writew(cpu_to_le16(v),p)
  54 #define outl(v,p)               __raw_writel(cpu_to_le32(v),p)
  55
  56 #define inb(p)  ({ unsigned int __v = __raw_readb(p); __v; })
  57 #define inw(p)  ({ unsigned int __v = __le16_to_cpu(__raw_readw(p)); __v; })
  58 #define inl(p)  ({ unsigned int __v = __le32_to_cpu(__raw_readl(p)); __v; })
  59
  60 #include <asm/arch/addrspace.h>
  61 /* Provides virt_to_phys, phys_to_virt, cached, uncached, map_physmem */
  62
  63 #endif /* __KERNEL__ */
  64
  65 static inline void sync(void)
  66 {
  67 }
  68
  69 /*
  70  * Take down a mapping set up by map_physmem().
  71  */
  72 static inline void unmap_physmem(void *vaddr, unsigned long len)
  73 {
  74
  75 }
  76
  77 #endif /* __ASM_AVR32_IO_H */