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 /* ++roman: The assignments to temp. vars avoid that gcc sometimes generates
32 * two accesses to memory, which may be undesirable for some devices.
34 #define __raw_readb(addr) \
35 ({ u8 __v = (*(volatile u8 *) (addr)); __v; })
36 #define __raw_readw(addr) \
37 ({ u16 __v = (*(volatile u16 *) (addr)); __v; })
38 #define __raw_readl(addr) \
39 ({ u32 __v = (*(volatile u32 *) (addr)); __v; })
41 #define __raw_writeb(addr,b) (void)((*(volatile u8 *) (addr)) = (b))
42 #define __raw_writew(addr,w) (void)((*(volatile u16 *) (addr)) = (w))
43 #define __raw_writel(addr,l) (void)((*(volatile u32 *) (addr)) = (l))
45 #define readb(addr) in_8((volatile u8 *)(addr))
46 #define writeb(b,addr) out_8((volatile u8 *)(addr), (b))
47 #if !defined(__BIG_ENDIAN)
48 #define readw(addr) (*(volatile u16 *) (addr))
49 #define readl(addr) (*(volatile u32 *) (addr))
50 #define writew(b,addr) ((*(volatile u16 *) (addr)) = (b))
51 #define writel(b,addr) ((*(volatile u32 *) (addr)) = (b))
53 #define readw(addr) in_le16((volatile u16 *)(addr))
54 #define readl(addr) in_le32((volatile u32 *)(addr))
55 #define writew(b,addr) out_le16((volatile u16 *)(addr),(b))
56 #define writel(b,addr) out_le32((volatile u32 *)(addr),(b))
60 * The insw/outsw/insl/outsl macros don't do byte-swapping.
61 * They are only used in practice for transferring buffers which
62 * are arrays of bytes, and byte-swapping is not appropriate in
65 #define insb(port, buf, ns) _insb((u8 *)((port)+_IO_BASE), (buf), (ns))
66 #define outsb(port, buf, ns) _outsb((u8 *)((port)+_IO_BASE), (buf), (ns))
67 #define insw(port, buf, ns) _insw_ns((u16 *)((port)+_IO_BASE), (buf), (ns))
68 #define outsw(port, buf, ns) _outsw_ns((u16 *)((port)+_IO_BASE), (buf), (ns))
69 #define insl(port, buf, nl) _insl_ns((u32 *)((port)+_IO_BASE), (buf), (nl))
70 #define outsl(port, buf, nl) _outsl_ns((u32 *)((port)+_IO_BASE), (buf), (nl))
72 #define inb(port) in_8((u8 *)((port)+_IO_BASE))
73 #define outb(val, port) out_8((u8 *)((port)+_IO_BASE), (val))
74 #if !defined(__BIG_ENDIAN)
75 #define inw(port) in_be16((u16 *)((port)+_IO_BASE))
76 #define outw(val, port) out_be16((u16 *)((port)+_IO_BASE), (val))
77 #define inl(port) in_be32((u32 *)((port)+_IO_BASE))
78 #define outl(val, port) out_be32((u32 *)((port)+_IO_BASE), (val))
80 #define inw(port) in_le16((u16 *)((port)+_IO_BASE))
81 #define outw(val, port) out_le16((u16 *)((port)+_IO_BASE), (val))
82 #define inl(port) in_le32((u32 *)((port)+_IO_BASE))
83 #define outl(val, port) out_le32((u32 *)((port)+_IO_BASE), (val))
86 extern inline void _insb(volatile u8 * port, void *buf, int ns)
88 u8 *data = (u8 *) buf;
93 extern inline void _outsb(volatile u8 * port, const void *buf, int ns)
95 u8 *data = (u8 *) buf;
100 extern inline void _insw(volatile u16 * port, void *buf, int ns)
102 u16 *data = (u16 *) buf;
104 *data++ = __sw16(*port);
107 extern inline void _outsw(volatile u16 * port, const void *buf, int ns)
109 u16 *data = (u16 *) buf;
111 *port = __sw16(*data);
116 extern inline void _insl(volatile u32 * port, void *buf, int nl)
118 u32 *data = (u32 *) buf;
120 *data++ = __sw32(*port);
123 extern inline void _outsl(volatile u32 * port, const void *buf, int nl)
125 u32 *data = (u32 *) buf;
127 *port = __sw32(*data);
132 extern inline void _insw_ns(volatile u16 * port, void *buf, int ns)
134 u16 *data = (u16 *) buf;
139 extern inline void _outsw_ns(volatile u16 * port, const void *buf, int ns)
141 u16 *data = (u16 *) buf;
147 extern inline void _insl_ns(volatile u32 * port, void *buf, int nl)
149 u32 *data = (u32 *) buf;
154 extern inline void _outsl_ns(volatile u32 * port, const void *buf, int nl)
156 u32 *data = (u32 *) buf;
164 * The *_ns versions below don't do byte-swapping.
165 * Neither do the standard versions now, these are just here
168 #define insw_ns(port, buf, ns) _insw_ns((u16 *)((port)+_IO_BASE), (buf), (ns))
169 #define outsw_ns(port, buf, ns) _outsw_ns((u16 *)((port)+_IO_BASE), (buf), (ns))
170 #define insl_ns(port, buf, nl) _insl_ns((u32 *)((port)+_IO_BASE), (buf), (nl))
171 #define outsl_ns(port, buf, nl) _outsl_ns((u32 *)((port)+_IO_BASE), (buf), (nl))
173 #define IO_SPACE_LIMIT ~0
176 * 8, 16 and 32 bit, big and little endian I/O operations, with barrier.
178 extern inline int in_8(volatile u8 * addr)
183 extern inline void out_8(volatile u8 * addr, int val)
188 extern inline int in_le16(volatile u16 * addr)
190 return __sw16(*addr);
193 extern inline int in_be16(volatile u16 * addr)
195 return (*addr & 0xFFFF);
198 extern inline void out_le16(volatile u16 * addr, int val)
203 extern inline void out_be16(volatile u16 * addr, int val)
208 extern inline unsigned in_le32(volatile u32 * addr)
210 return __sw32(*addr);
213 extern inline unsigned in_be32(volatile u32 * addr)
218 extern inline void out_le32(volatile unsigned *addr, int val)
223 extern inline void out_be32(volatile unsigned *addr, int val)
228 static inline void sync(void)
230 /* This sync function is for PowerPC or other architecture instruction
231 * ColdFire does not have this instruction. Dummy function, added for
232 * compatibility (CFI driver)
235 #endif /* __ASM_M68K_IO_H__ */