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>
35 #define __raw_readb(addr) (*(volatile u8 *)(addr))
36 #define __raw_readw(addr) (*(volatile u16 *)(addr))
37 #define __raw_readl(addr) (*(volatile u32 *)(addr))
39 #define __raw_writeb(b,addr) ((*(volatile u8 *) (addr)) = (b))
40 #define __raw_writew(w,addr) ((*(volatile u16 *) (addr)) = (w))
41 #define __raw_writel(l,addr) ((*(volatile u32 *) (addr)) = (l))
43 #define readb(addr) in_8((volatile u8 *)(addr))
44 #define writeb(b,addr) out_8((volatile u8 *)(addr), (b))
45 #if !defined(__BIG_ENDIAN)
46 #define readw(addr) (*(volatile u16 *) (addr))
47 #define readl(addr) (*(volatile u32 *) (addr))
48 #define writew(b,addr) ((*(volatile u16 *) (addr)) = (b))
49 #define writel(b,addr) ((*(volatile u32 *) (addr)) = (b))
51 #define readw(addr) in_le16((volatile u16 *)(addr))
52 #define readl(addr) in_le32((volatile u32 *)(addr))
53 #define writew(b,addr) out_le16((volatile u16 *)(addr),(b))
54 #define writel(b,addr) out_le32((volatile u32 *)(addr),(b))
58 * The insw/outsw/insl/outsl macros don't do byte-swapping.
59 * They are only used in practice for transferring buffers which
60 * are arrays of bytes, and byte-swapping is not appropriate in
63 #define insb(port, buf, ns) _insb((u8 *)((port)+_IO_BASE), (buf), (ns))
64 #define outsb(port, buf, ns) _outsb((u8 *)((port)+_IO_BASE), (buf), (ns))
65 #define insw(port, buf, ns) _insw_ns((u16 *)((port)+_IO_BASE), (buf), (ns))
66 #define outsw(port, buf, ns) _outsw_ns((u16 *)((port)+_IO_BASE), (buf), (ns))
67 #define insl(port, buf, nl) _insl_ns((u32 *)((port)+_IO_BASE), (buf), (nl))
68 #define outsl(port, buf, nl) _outsl_ns((u32 *)((port)+_IO_BASE), (buf), (nl))
70 #define inb(port) in_8((u8 *)((port)+_IO_BASE))
71 #define outb(val, port) out_8((u8 *)((port)+_IO_BASE), (val))
72 #if !defined(__BIG_ENDIAN)
73 #define inw(port) in_be16((u16 *)((port)+_IO_BASE))
74 #define outw(val, port) out_be16((u16 *)((port)+_IO_BASE), (val))
75 #define inl(port) in_be32((u32 *)((port)+_IO_BASE))
76 #define outl(val, port) out_be32((u32 *)((port)+_IO_BASE), (val))
78 #define inw(port) in_le16((u16 *)((port)+_IO_BASE))
79 #define outw(val, port) out_le16((u16 *)((port)+_IO_BASE), (val))
80 #define inl(port) in_le32((u32 *)((port)+_IO_BASE))
81 #define outl(val, port) out_le32((u32 *)((port)+_IO_BASE), (val))
84 extern inline void _insb(volatile u8 * port, void *buf, int ns)
86 u8 *data = (u8 *) buf;
91 extern inline void _outsb(volatile u8 * port, const void *buf, int ns)
93 u8 *data = (u8 *) buf;
98 extern inline void _insw(volatile u16 * port, void *buf, int ns)
100 u16 *data = (u16 *) buf;
102 *data++ = __sw16(*port);
105 extern inline void _outsw(volatile u16 * port, const void *buf, int ns)
107 u16 *data = (u16 *) buf;
109 *port = __sw16(*data);
114 extern inline void _insl(volatile u32 * port, void *buf, int nl)
116 u32 *data = (u32 *) buf;
118 *data++ = __sw32(*port);
121 extern inline void _outsl(volatile u32 * port, const void *buf, int nl)
123 u32 *data = (u32 *) buf;
125 *port = __sw32(*data);
130 extern inline void _insw_ns(volatile u16 * port, void *buf, int ns)
132 u16 *data = (u16 *) buf;
137 extern inline void _outsw_ns(volatile u16 * port, const void *buf, int ns)
139 u16 *data = (u16 *) buf;
145 extern inline void _insl_ns(volatile u32 * port, void *buf, int nl)
147 u32 *data = (u32 *) buf;
152 extern inline void _outsl_ns(volatile u32 * port, const void *buf, int nl)
154 u32 *data = (u32 *) buf;
162 * The *_ns versions below don't do byte-swapping.
163 * Neither do the standard versions now, these are just here
166 #define insw_ns(port, buf, ns) _insw_ns((u16 *)((port)+_IO_BASE), (buf), (ns))
167 #define outsw_ns(port, buf, ns) _outsw_ns((u16 *)((port)+_IO_BASE), (buf), (ns))
168 #define insl_ns(port, buf, nl) _insl_ns((u32 *)((port)+_IO_BASE), (buf), (nl))
169 #define outsl_ns(port, buf, nl) _outsl_ns((u32 *)((port)+_IO_BASE), (buf), (nl))
171 #define IO_SPACE_LIMIT ~0
174 * 8, 16 and 32 bit, big and little endian I/O operations, with barrier.
176 extern inline int in_8(volatile u8 * addr)
181 extern inline void out_8(volatile u8 * addr, int val)
186 extern inline int in_le16(volatile u16 * addr)
188 return __sw16(*addr);
191 extern inline int in_be16(volatile u16 * addr)
193 return (*addr & 0xFFFF);
196 extern inline void out_le16(volatile u16 * addr, int val)
201 extern inline void out_be16(volatile u16 * addr, int val)
206 extern inline unsigned in_le32(volatile u32 * addr)
208 return __sw32(*addr);
211 extern inline unsigned in_be32(volatile u32 * addr)
216 extern inline void out_le32(volatile unsigned *addr, int val)
221 extern inline void out_be32(volatile unsigned *addr, int val)
226 static inline void sync(void)
228 /* This sync function is for PowerPC or other architecture instruction
229 * ColdFire does not have this instruction. Dummy function, added for
230 * compatibility (CFI driver)
235 * Given a physical address and a length, return a virtual address
236 * that can be used to access the memory range with the caching
237 * properties specified by "flags".
239 #define MAP_NOCACHE (0)
240 #define MAP_WRCOMBINE (0)
241 #define MAP_WRBACK (0)
242 #define MAP_WRTHROUGH (0)
244 static inline void *map_physmem(phys_addr_t paddr, unsigned long len,
247 return (void *)paddr;
251 * Take down a mapping set up by map_physmem().
253 static inline void unmap_physmem(void *vaddr, unsigned long flags)
258 static inline phys_addr_t virt_to_phys(void * vaddr)
260 return (phys_addr_t)(vaddr);
263 #endif /* __ASM_M68K_IO_H__ */