4 * Copyright (C) 2004-2007 Freescale Semiconductor, Inc.
5 * TsiChung Liew (Tsi-Chung.Liew@freescale.com)
7 * See file CREDITS for list of people who contributed to this
10 * This program is free software; you can redistribute it and/or
11 * modify it under the terms of the GNU General Public License as
12 * published by the Free Software Foundation; either version 2 of
13 * the License, or (at your option) any later version.
15 * This program is distributed in the hope that it will be useful,
16 * but WITHOUT ANY WARRANTY; without even the implied warranty of
17 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
18 * GNU General Public License for more details.
20 * You should have received a copy of the GNU General Public License
21 * along with this program; if not, write to the Free Software
22 * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
26 #ifndef __ASM_M68K_IO_H__
27 #define __ASM_M68K_IO_H__
29 #include <asm/byteorder.h>
31 #define __raw_readb(addr) (*(volatile u8 *)(addr))
32 #define __raw_readw(addr) (*(volatile u16 *)(addr))
33 #define __raw_readl(addr) (*(volatile u32 *)(addr))
35 #define __raw_writeb(b,addr) ((*(volatile u8 *) (addr)) = (b))
36 #define __raw_writew(w,addr) ((*(volatile u16 *) (addr)) = (w))
37 #define __raw_writel(l,addr) ((*(volatile u32 *) (addr)) = (l))
39 #define readb(addr) in_8((volatile u8 *)(addr))
40 #define writeb(b,addr) out_8((volatile u8 *)(addr), (b))
41 #if !defined(__BIG_ENDIAN)
42 #define readw(addr) (*(volatile u16 *) (addr))
43 #define readl(addr) (*(volatile u32 *) (addr))
44 #define writew(b,addr) ((*(volatile u16 *) (addr)) = (b))
45 #define writel(b,addr) ((*(volatile u32 *) (addr)) = (b))
47 #define readw(addr) in_le16((volatile u16 *)(addr))
48 #define readl(addr) in_le32((volatile u32 *)(addr))
49 #define writew(b,addr) out_le16((volatile u16 *)(addr),(b))
50 #define writel(b,addr) out_le32((volatile u32 *)(addr),(b))
54 * The insw/outsw/insl/outsl macros don't do byte-swapping.
55 * They are only used in practice for transferring buffers which
56 * are arrays of bytes, and byte-swapping is not appropriate in
59 #define insb(port, buf, ns) _insb((u8 *)((port)+_IO_BASE), (buf), (ns))
60 #define outsb(port, buf, ns) _outsb((u8 *)((port)+_IO_BASE), (buf), (ns))
61 #define insw(port, buf, ns) _insw_ns((u16 *)((port)+_IO_BASE), (buf), (ns))
62 #define outsw(port, buf, ns) _outsw_ns((u16 *)((port)+_IO_BASE), (buf), (ns))
63 #define insl(port, buf, nl) _insl_ns((u32 *)((port)+_IO_BASE), (buf), (nl))
64 #define outsl(port, buf, nl) _outsl_ns((u32 *)((port)+_IO_BASE), (buf), (nl))
66 #define inb(port) in_8((u8 *)((port)+_IO_BASE))
67 #define outb(val, port) out_8((u8 *)((port)+_IO_BASE), (val))
68 #if !defined(__BIG_ENDIAN)
69 #define inw(port) in_be16((u16 *)((port)+_IO_BASE))
70 #define outw(val, port) out_be16((u16 *)((port)+_IO_BASE), (val))
71 #define inl(port) in_be32((u32 *)((port)+_IO_BASE))
72 #define outl(val, port) out_be32((u32 *)((port)+_IO_BASE), (val))
74 #define inw(port) in_le16((u16 *)((port)+_IO_BASE))
75 #define outw(val, port) out_le16((u16 *)((port)+_IO_BASE), (val))
76 #define inl(port) in_le32((u32 *)((port)+_IO_BASE))
77 #define outl(val, port) out_le32((u32 *)((port)+_IO_BASE), (val))
80 extern inline void _insb(volatile u8
* port
, void *buf
, int ns
)
82 u8
*data
= (u8
*) buf
;
87 extern inline void _outsb(volatile u8
* port
, const void *buf
, int ns
)
89 u8
*data
= (u8
*) buf
;
94 extern inline void _insw(volatile u16
* port
, void *buf
, int ns
)
96 u16
*data
= (u16
*) buf
;
98 *data
++ = __sw16(*port
);
101 extern inline void _outsw(volatile u16
* port
, const void *buf
, int ns
)
103 u16
*data
= (u16
*) buf
;
105 *port
= __sw16(*data
);
110 extern inline void _insl(volatile u32
* port
, void *buf
, int nl
)
112 u32
*data
= (u32
*) buf
;
114 *data
++ = __sw32(*port
);
117 extern inline void _outsl(volatile u32
* port
, const void *buf
, int nl
)
119 u32
*data
= (u32
*) buf
;
121 *port
= __sw32(*data
);
126 extern inline void _insw_ns(volatile u16
* port
, void *buf
, int ns
)
128 u16
*data
= (u16
*) buf
;
133 extern inline void _outsw_ns(volatile u16
* port
, const void *buf
, int ns
)
135 u16
*data
= (u16
*) buf
;
141 extern inline void _insl_ns(volatile u32
* port
, void *buf
, int nl
)
143 u32
*data
= (u32
*) buf
;
148 extern inline void _outsl_ns(volatile u32
* port
, const void *buf
, int nl
)
150 u32
*data
= (u32
*) buf
;
158 * The *_ns versions below don't do byte-swapping.
159 * Neither do the standard versions now, these are just here
162 #define insw_ns(port, buf, ns) _insw_ns((u16 *)((port)+_IO_BASE), (buf), (ns))
163 #define outsw_ns(port, buf, ns) _outsw_ns((u16 *)((port)+_IO_BASE), (buf), (ns))
164 #define insl_ns(port, buf, nl) _insl_ns((u32 *)((port)+_IO_BASE), (buf), (nl))
165 #define outsl_ns(port, buf, nl) _outsl_ns((u32 *)((port)+_IO_BASE), (buf), (nl))
167 #define IO_SPACE_LIMIT ~0
170 * 8, 16 and 32 bit, big and little endian I/O operations, with barrier.
172 extern inline int in_8(volatile u8
* addr
)
177 extern inline void out_8(volatile u8
* addr
, int val
)
182 extern inline int in_le16(volatile u16
* addr
)
184 return __sw16(*addr
);
187 extern inline int in_be16(volatile u16
* addr
)
189 return (*addr
& 0xFFFF);
192 extern inline void out_le16(volatile u16
* addr
, int val
)
197 extern inline void out_be16(volatile u16
* addr
, int val
)
202 extern inline unsigned in_le32(volatile u32
* addr
)
204 return __sw32(*addr
);
207 extern inline unsigned in_be32(volatile u32
* addr
)
212 extern inline void out_le32(volatile unsigned *addr
, int val
)
217 extern inline void out_be32(volatile unsigned *addr
, int val
)
222 static inline void sync(void)
224 /* This sync function is for PowerPC or other architecture instruction
225 * ColdFire does not have this instruction. Dummy function, added for
226 * compatibility (CFI driver)
231 * Given a physical address and a length, return a virtual address
232 * that can be used to access the memory range with the caching
233 * properties specified by "flags".
235 typedef unsigned long phys_addr_t
;
237 #define MAP_NOCACHE (0)
238 #define MAP_WRCOMBINE (0)
239 #define MAP_WRBACK (0)
240 #define MAP_WRTHROUGH (0)
242 static inline void *map_physmem(phys_addr_t paddr
, unsigned long len
,
245 return (void *)paddr
;
249 * Take down a mapping set up by map_physmem().
251 static inline void unmap_physmem(void *vaddr
, unsigned long flags
)
256 #endif /* __ASM_M68K_IO_H__ */