arch/avr32/include/asm/io.h

   1 /*
   2  * Copyright (C) 2006 Atmel Corporation
   3  *
   4  * See file CREDITS for list of people who contributed to this
   5  * project.
   6  *
   7  * This program is free software; you can redistribute it and/or
   8  * modify it under the terms of the GNU General Public License as
   9  * published by the Free Software Foundation; either version 2 of
  10  * the License, or (at your option) any later version.
  11  *
  12  * This program is distributed in the hope that it will be useful,
  13  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  14  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  15  * GNU General Public License for more details.
  16  *
  17  * You should have received a copy of the GNU General Public License
  18  * along with this program; if not, write to the Free Software
  19  * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
  20  * MA 02111-1307 USA
  21  */
  22 #ifndef __ASM_AVR32_IO_H
  23 #define __ASM_AVR32_IO_H
  24
  25 #include <asm/types.h>
  26
  27 #ifdef __KERNEL__
  28
  29 /*
  30  * Generic IO read/write.  These perform native-endian accesses.  Note
  31  * that some architectures will want to re-define __raw_{read,write}w.
  32  */
  33 extern void __raw_writesb(unsigned int addr, const void *data, int bytelen);
  34 extern void __raw_writesw(unsigned int addr, const void *data, int wordlen);
  35 extern void __raw_writesl(unsigned int addr, const void *data, int longlen);
  36
  37 extern void __raw_readsb(unsigned int addr, void *data, int bytelen);
  38 extern void __raw_readsw(unsigned int addr, void *data, int wordlen);
  39 extern void __raw_readsl(unsigned int addr, void *data, int longlen);
  40
  41 #define __raw_writeb(v,a)       (*(volatile unsigned char  *)(a) = (v))
  42 #define __raw_writew(v,a)       (*(volatile unsigned short *)(a) = (v))
  43 #define __raw_writel(v,a)       (*(volatile unsigned int   *)(a) = (v))
  44
  45 #define __raw_readb(a)          (*(volatile unsigned char  *)(a))
  46 #define __raw_readw(a)          (*(volatile unsigned short *)(a))
  47 #define __raw_readl(a)          (*(volatile unsigned int   *)(a))
  48
  49 /* As long as I/O is only performed in P4 (or possibly P3), we're safe */
  50 #define writeb(v,a)             __raw_writeb(v,a)
  51 #define writew(v,a)             __raw_writew(v,a)
  52 #define writel(v,a)             __raw_writel(v,a)
  53
  54 #define readb(a)                __raw_readb(a)
  55 #define readw(a)                __raw_readw(a)
  56 #define readl(a)                __raw_readl(a)
  57
  58 /*
  59  * Bad read/write accesses...
  60  */
  61 extern void __readwrite_bug(const char *fn);
  62
  63 #define IO_SPACE_LIMIT  0xffffffff
  64
  65 /*
  66  * All I/O is memory mapped, so these macros doesn't make very much sense
  67  */
  68 #define outb(v,p)               __raw_writeb(v, p)
  69 #define outw(v,p)               __raw_writew(cpu_to_le16(v),p)
  70 #define outl(v,p)               __raw_writel(cpu_to_le32(v),p)
  71
  72 #define inb(p)  ({ unsigned int __v = __raw_readb(p); __v; })
  73 #define inw(p)  ({ unsigned int __v = __le16_to_cpu(__raw_readw(p)); __v; })
  74 #define inl(p)  ({ unsigned int __v = __le32_to_cpu(__raw_readl(p)); __v; })
  75
  76 #include <asm/arch/addrspace.h>
  77 /* Provides virt_to_phys, phys_to_virt, cached, uncached, map_physmem */
  78
  79 #endif /* __KERNEL__ */
  80
  81 static inline void sync(void)
  82 {
  83 }
  84
  85 /*
  86  * Take down a mapping set up by map_physmem().
  87  */
  88 static inline void unmap_physmem(void *vaddr, unsigned long len)
  89 {
  90
  91 }
  92
  93 #endif /* __ASM_AVR32_IO_H */