blob: 8e5fe113cb31b5e8f729ded45827d626b840b31f [file] [log] [blame]
wdenk041b1de2002-09-07 21:30:09 +00001/* originally from linux source.
2 * removed the dependencies on CONFIG_ values
3 * removed virt_to_phys stuff (and in fact everything surrounded by #if __KERNEL__)
4 * Modified By Rob Taylor, Flying Pig Systems, 2000
5 */
6
7#ifndef _PPC_IO_H
8#define _PPC_IO_H
9
10#include <linux/config.h>
11#include <asm/byteorder.h>
12
13#define SIO_CONFIG_RA 0x398
14#define SIO_CONFIG_RD 0x399
15
16
17#define readb(addr) in_8((volatile u8 *)(addr))
18#define writeb(b,addr) out_8((volatile u8 *)(addr), (b))
19#if !defined(__BIG_ENDIAN)
20#define readw(addr) (*(volatile u16 *) (addr))
21#define readl(addr) (*(volatile u32 *) (addr))
22#define writew(b,addr) ((*(volatile u16 *) (addr)) = (b))
23#define writel(b,addr) ((*(volatile u32 *) (addr)) = (b))
24#else
25#define readw(addr) in_le16((volatile u16 *)(addr))
26#define readl(addr) in_le32((volatile u32 *)(addr))
27#define writew(b,addr) out_le16((volatile u16 *)(addr),(b))
28#define writel(b,addr) out_le32((volatile u32 *)(addr),(b))
29#endif
30
31/*
32 * The insw/outsw/insl/outsl macros don't do byte-swapping.
33 * They are only used in practice for transferring buffers which
34 * are arrays of bytes, and byte-swapping is not appropriate in
35 * that case. - paulus
36 */
37#define insb(port, buf, ns) _insb((u8 *)((port)+_IO_BASE), (buf), (ns))
38#define outsb(port, buf, ns) _outsb((u8 *)((port)+_IO_BASE), (buf), (ns))
39#define insw(port, buf, ns) _insw_ns((u16 *)((port)+_IO_BASE), (buf), (ns))
40#define outsw(port, buf, ns) _outsw_ns((u16 *)((port)+_IO_BASE), (buf), (ns))
41#define insl(port, buf, nl) _insl_ns((u32 *)((port)+_IO_BASE), (buf), (nl))
42#define outsl(port, buf, nl) _outsl_ns((u32 *)((port)+_IO_BASE), (buf), (nl))
43
44#define inb(port) in_8((u8 *)((port)+_IO_BASE))
45#define outb(val, port) out_8((u8 *)((port)+_IO_BASE), (val))
46#if !defined(__BIG_ENDIAN)
47#define inw(port) in_be16((u16 *)((port)+_IO_BASE))
48#define outw(val, port) out_be16((u16 *)((port)+_IO_BASE), (val))
49#define inl(port) in_be32((u32 *)((port)+_IO_BASE))
50#define outl(val, port) out_be32((u32 *)((port)+_IO_BASE), (val))
51#else
52#define inw(port) in_le16((u16 *)((port)+_IO_BASE))
53#define outw(val, port) out_le16((u16 *)((port)+_IO_BASE), (val))
54#define inl(port) in_le32((u32 *)((port)+_IO_BASE))
55#define outl(val, port) out_le32((u32 *)((port)+_IO_BASE), (val))
56#endif
57
58#define inb_p(port) in_8((u8 *)((port)+_IO_BASE))
59#define outb_p(val, port) out_8((u8 *)((port)+_IO_BASE), (val))
60#define inw_p(port) in_le16((u16 *)((port)+_IO_BASE))
61#define outw_p(val, port) out_le16((u16 *)((port)+_IO_BASE), (val))
62#define inl_p(port) in_le32((u32 *)((port)+_IO_BASE))
63#define outl_p(val, port) out_le32((u32 *)((port)+_IO_BASE), (val))
64
65extern void _insb(volatile u8 *port, void *buf, int ns);
66extern void _outsb(volatile u8 *port, const void *buf, int ns);
67extern void _insw(volatile u16 *port, void *buf, int ns);
68extern void _outsw(volatile u16 *port, const void *buf, int ns);
69extern void _insl(volatile u32 *port, void *buf, int nl);
70extern void _outsl(volatile u32 *port, const void *buf, int nl);
71extern void _insw_ns(volatile u16 *port, void *buf, int ns);
72extern void _outsw_ns(volatile u16 *port, const void *buf, int ns);
73extern void _insl_ns(volatile u32 *port, void *buf, int nl);
74extern void _outsl_ns(volatile u32 *port, const void *buf, int nl);
75
76/*
77 * The *_ns versions below don't do byte-swapping.
78 * Neither do the standard versions now, these are just here
79 * for older code.
80 */
81#define insw_ns(port, buf, ns) _insw_ns((u16 *)((port)+_IO_BASE), (buf), (ns))
82#define outsw_ns(port, buf, ns) _outsw_ns((u16 *)((port)+_IO_BASE), (buf), (ns))
83#define insl_ns(port, buf, nl) _insl_ns((u32 *)((port)+_IO_BASE), (buf), (nl))
84#define outsl_ns(port, buf, nl) _outsl_ns((u32 *)((port)+_IO_BASE), (buf), (nl))
85
86
87#define IO_SPACE_LIMIT ~0
88
89#define memset_io(a,b,c) memset((void *)(a),(b),(c))
90#define memcpy_fromio(a,b,c) memcpy((a),(void *)(b),(c))
91#define memcpy_toio(a,b,c) memcpy((void *)(a),(b),(c))
92
93/*
94 * Enforce In-order Execution of I/O:
95 * Acts as a barrier to ensure all previous I/O accesses have
96 * completed before any further ones are issued.
97 */
98#define eieio() __asm__ __volatile__ ("eieio" : : : "memory");
99#define sync() __asm__ __volatile__ ("sync" : : : "memory");
100
101/* Enforce in-order execution of data I/O.
102 * No distinction between read/write on PPC; use eieio for all three.
103 */
104#define iobarrier_rw() eieio()
105#define iobarrier_r() eieio()
106#define iobarrier_w() eieio()
107
108/*
109 * 8, 16 and 32 bit, big and little endian I/O operations, with barrier.
110 */
111extern inline int in_8(volatile u8 *addr)
112{
113 int ret;
114
115 __asm__ __volatile__("lbz%U1%X1 %0,%1; eieio" : "=r" (ret) : "m" (*addr));
116 return ret;
117}
118
119extern inline void out_8(volatile u8 *addr, int val)
120{
121 __asm__ __volatile__("stb%U0%X0 %1,%0; eieio" : "=m" (*addr) : "r" (val));
122}
123
124extern inline int in_le16(volatile u16 *addr)
125{
126 int ret;
127
128 __asm__ __volatile__("lhbrx %0,0,%1; eieio" : "=r" (ret) :
wdenk8bde7f72003-06-27 21:31:46 +0000129 "r" (addr), "m" (*addr));
wdenk041b1de2002-09-07 21:30:09 +0000130 return ret;
131}
132
133extern inline int in_be16(volatile u16 *addr)
134{
135 int ret;
136
137 __asm__ __volatile__("lhz%U1%X1 %0,%1; eieio" : "=r" (ret) : "m" (*addr));
138 return ret;
139}
140
141extern inline void out_le16(volatile u16 *addr, int val)
142{
143 __asm__ __volatile__("sthbrx %1,0,%2; eieio" : "=m" (*addr) :
wdenk8bde7f72003-06-27 21:31:46 +0000144 "r" (val), "r" (addr));
wdenk041b1de2002-09-07 21:30:09 +0000145}
146
147extern inline void out_be16(volatile u16 *addr, int val)
148{
149 __asm__ __volatile__("sth%U0%X0 %1,%0; eieio" : "=m" (*addr) : "r" (val));
150}
151
152extern inline unsigned in_le32(volatile u32 *addr)
153{
154 unsigned ret;
155
156 __asm__ __volatile__("lwbrx %0,0,%1; eieio" : "=r" (ret) :
wdenk8bde7f72003-06-27 21:31:46 +0000157 "r" (addr), "m" (*addr));
wdenk041b1de2002-09-07 21:30:09 +0000158 return ret;
159}
160
161extern inline unsigned in_be32(volatile u32 *addr)
162{
163 unsigned ret;
164
165 __asm__ __volatile__("lwz%U1%X1 %0,%1; eieio" : "=r" (ret) : "m" (*addr));
166 return ret;
167}
168
169extern inline void out_le32(volatile unsigned *addr, int val)
170{
171 __asm__ __volatile__("stwbrx %1,0,%2; eieio" : "=m" (*addr) :
wdenk8bde7f72003-06-27 21:31:46 +0000172 "r" (val), "r" (addr));
wdenk041b1de2002-09-07 21:30:09 +0000173}
174
175extern inline void out_be32(volatile unsigned *addr, int val)
176{
177 __asm__ __volatile__("stw%U0%X0 %1,%0; eieio" : "=m" (*addr) : "r" (val));
178}
179
180#endif