2 * Copyright (C) 2006 Atmel Corporation
4 * See file CREDITS for list of people who contributed to this
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.
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.
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,
22 #ifndef __ASM_AVR32_IO_H
23 #define __ASM_AVR32_IO_H
28 * Generic IO read/write. These perform native-endian accesses. Note
29 * that some architectures will want to re-define __raw_{read,write}w.
31 extern void __raw_writesb(unsigned int addr, const void *data, int bytelen);
32 extern void __raw_writesw(unsigned int addr, const void *data, int wordlen);
33 extern void __raw_writesl(unsigned int addr, const void *data, int longlen);
35 extern void __raw_readsb(unsigned int addr, void *data, int bytelen);
36 extern void __raw_readsw(unsigned int addr, void *data, int wordlen);
37 extern void __raw_readsl(unsigned int addr, void *data, int longlen);
39 #define __raw_writeb(v,a) (*(volatile unsigned char *)(a) = (v))
40 #define __raw_writew(v,a) (*(volatile unsigned short *)(a) = (v))
41 #define __raw_writel(v,a) (*(volatile unsigned int *)(a) = (v))
43 #define __raw_readb(a) (*(volatile unsigned char *)(a))
44 #define __raw_readw(a) (*(volatile unsigned short *)(a))
45 #define __raw_readl(a) (*(volatile unsigned int *)(a))
47 /* As long as I/O is only performed in P4 (or possibly P3), we're safe */
48 #define writeb(v,a) __raw_writeb(v,a)
49 #define writew(v,a) __raw_writew(v,a)
50 #define writel(v,a) __raw_writel(v,a)
52 #define readb(a) __raw_readb(a)
53 #define readw(a) __raw_readw(a)
54 #define readl(a) __raw_readl(a)
57 * Bad read/write accesses...
59 extern void __readwrite_bug(const char *fn);
61 #define IO_SPACE_LIMIT 0xffffffff
64 * All I/O is memory mapped, so these macros doesn't make very much sense
66 #define outb(v,p) __raw_writeb(v, p)
67 #define outw(v,p) __raw_writew(cpu_to_le16(v),p)
68 #define outl(v,p) __raw_writel(cpu_to_le32(v),p)
70 #define inb(p) ({ unsigned int __v = __raw_readb(p); __v; })
71 #define inw(p) ({ unsigned int __v = __le16_to_cpu(__raw_readw(p)); __v; })
72 #define inl(p) ({ unsigned int __v = __le32_to_cpu(__raw_readl(p)); __v; })
74 #include <asm/addrspace.h>
76 /* virt_to_phys will only work when address is in P1 or P2 */
77 static __inline__ unsigned long virt_to_phys(volatile void *address)
79 return PHYSADDR(address);
82 static __inline__ void * phys_to_virt(unsigned long address)
84 return (void *)P1SEGADDR(address);
87 #define cached(addr) ((void *)P1SEGADDR(addr))
88 #define uncached(addr) ((void *)P2SEGADDR(addr))
90 #endif /* __KERNEL__ */
92 static inline void sync(void)
97 * Given a physical address and a length, return a virtual address
98 * that can be used to access the memory range with the caching
99 * properties specified by "flags".
101 * This implementation works for memory below 512MiB (flash, etc.) as
102 * well as above 3.5GiB (internal peripherals.)
104 typedef unsigned long phys_addr_t;
106 #define MAP_NOCACHE (0)
107 #define MAP_WRCOMBINE (1 << 7)
108 #define MAP_WRBACK (MAP_WRCOMBINE | (1 << 9))
109 #define MAP_WRTHROUGH (MAP_WRBACK | (1 << 0))
112 map_physmem(phys_addr_t paddr, unsigned long len, unsigned long flags)
114 if (flags == MAP_WRBACK)
115 return (void *)P1SEGADDR(paddr);
117 return (void *)P2SEGADDR(paddr);
121 * Take down a mapping set up by map_physmem().
123 static inline void unmap_physmem(void *vaddr, unsigned long len)
128 #endif /* __ASM_AVR32_IO_H */