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raw_io.h
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1 /*
2  * linux/include/asm-m68k/raw_io.h
3  *
4  * 10/20/00 RZ: - created from bits of io.h and ide.h to cleanup namespace
5  *
6  */
7 
8 #ifndef _RAW_IO_H
9 #define _RAW_IO_H
10 
11 #ifdef __KERNEL__
12 
13 #include <asm/types.h>
14 
15 
16 /* Values for nocacheflag and cmode */
17 #define IOMAP_FULL_CACHING 0
18 #define IOMAP_NOCACHE_SER 1
19 #define IOMAP_NOCACHE_NONSER 2
20 #define IOMAP_WRITETHROUGH 3
21 
22 extern void iounmap(void __iomem *addr);
23 
24 extern void __iomem *__ioremap(unsigned long physaddr, unsigned long size,
25  int cacheflag);
26 extern void __iounmap(void *addr, unsigned long size);
27 
28 
29 /* ++roman: The assignments to temp. vars avoid that gcc sometimes generates
30  * two accesses to memory, which may be undesirable for some devices.
31  */
32 #define in_8(addr) \
33  ({ u8 __v = (*(__force volatile u8 *) (addr)); __v; })
34 #define in_be16(addr) \
35  ({ u16 __v = (*(__force volatile u16 *) (addr)); __v; })
36 #define in_be32(addr) \
37  ({ u32 __v = (*(__force volatile u32 *) (addr)); __v; })
38 #define in_le16(addr) \
39  ({ u16 __v = le16_to_cpu(*(__force volatile __le16 *) (addr)); __v; })
40 #define in_le32(addr) \
41  ({ u32 __v = le32_to_cpu(*(__force volatile __le32 *) (addr)); __v; })
42 
43 #define out_8(addr,b) (void)((*(__force volatile u8 *) (addr)) = (b))
44 #define out_be16(addr,w) (void)((*(__force volatile u16 *) (addr)) = (w))
45 #define out_be32(addr,l) (void)((*(__force volatile u32 *) (addr)) = (l))
46 #define out_le16(addr,w) (void)((*(__force volatile __le16 *) (addr)) = cpu_to_le16(w))
47 #define out_le32(addr,l) (void)((*(__force volatile __le32 *) (addr)) = cpu_to_le32(l))
48 
49 #define raw_inb in_8
50 #define raw_inw in_be16
51 #define raw_inl in_be32
52 #define __raw_readb in_8
53 #define __raw_readw in_be16
54 #define __raw_readl in_be32
55 
56 #define raw_outb(val,port) out_8((port),(val))
57 #define raw_outw(val,port) out_be16((port),(val))
58 #define raw_outl(val,port) out_be32((port),(val))
59 #define __raw_writeb(val,addr) out_8((addr),(val))
60 #define __raw_writew(val,addr) out_be16((addr),(val))
61 #define __raw_writel(val,addr) out_be32((addr),(val))
62 
63 static inline void raw_insb(volatile u8 __iomem *port, u8 *buf, unsigned int len)
64 {
65  unsigned int i;
66 
67  for (i = 0; i < len; i++)
68  *buf++ = in_8(port);
69 }
70 
71 static inline void raw_outsb(volatile u8 __iomem *port, const u8 *buf,
72  unsigned int len)
73 {
74  unsigned int i;
75 
76  for (i = 0; i < len; i++)
77  out_8(port, *buf++);
78 }
79 
80 static inline void raw_insw(volatile u16 __iomem *port, u16 *buf, unsigned int nr)
81 {
82  unsigned int tmp;
83 
84  if (nr & 15) {
85  tmp = (nr & 15) - 1;
86  asm volatile (
87  "1: movew %2@,%0@+; dbra %1,1b"
88  : "=a" (buf), "=d" (tmp)
89  : "a" (port), "0" (buf),
90  "1" (tmp));
91  }
92  if (nr >> 4) {
93  tmp = (nr >> 4) - 1;
94  asm volatile (
95  "1: "
96  "movew %2@,%0@+; "
97  "movew %2@,%0@+; "
98  "movew %2@,%0@+; "
99  "movew %2@,%0@+; "
100  "movew %2@,%0@+; "
101  "movew %2@,%0@+; "
102  "movew %2@,%0@+; "
103  "movew %2@,%0@+; "
104  "movew %2@,%0@+; "
105  "movew %2@,%0@+; "
106  "movew %2@,%0@+; "
107  "movew %2@,%0@+; "
108  "movew %2@,%0@+; "
109  "movew %2@,%0@+; "
110  "movew %2@,%0@+; "
111  "movew %2@,%0@+; "
112  "dbra %1,1b"
113  : "=a" (buf), "=d" (tmp)
114  : "a" (port), "0" (buf),
115  "1" (tmp));
116  }
117 }
118 
119 static inline void raw_outsw(volatile u16 __iomem *port, const u16 *buf,
120  unsigned int nr)
121 {
122  unsigned int tmp;
123 
124  if (nr & 15) {
125  tmp = (nr & 15) - 1;
126  asm volatile (
127  "1: movew %0@+,%2@; dbra %1,1b"
128  : "=a" (buf), "=d" (tmp)
129  : "a" (port), "0" (buf),
130  "1" (tmp));
131  }
132  if (nr >> 4) {
133  tmp = (nr >> 4) - 1;
134  asm volatile (
135  "1: "
136  "movew %0@+,%2@; "
137  "movew %0@+,%2@; "
138  "movew %0@+,%2@; "
139  "movew %0@+,%2@; "
140  "movew %0@+,%2@; "
141  "movew %0@+,%2@; "
142  "movew %0@+,%2@; "
143  "movew %0@+,%2@; "
144  "movew %0@+,%2@; "
145  "movew %0@+,%2@; "
146  "movew %0@+,%2@; "
147  "movew %0@+,%2@; "
148  "movew %0@+,%2@; "
149  "movew %0@+,%2@; "
150  "movew %0@+,%2@; "
151  "movew %0@+,%2@; "
152  "dbra %1,1b"
153  : "=a" (buf), "=d" (tmp)
154  : "a" (port), "0" (buf),
155  "1" (tmp));
156  }
157 }
158 
159 static inline void raw_insl(volatile u32 __iomem *port, u32 *buf, unsigned int nr)
160 {
161  unsigned int tmp;
162 
163  if (nr & 15) {
164  tmp = (nr & 15) - 1;
165  asm volatile (
166  "1: movel %2@,%0@+; dbra %1,1b"
167  : "=a" (buf), "=d" (tmp)
168  : "a" (port), "0" (buf),
169  "1" (tmp));
170  }
171  if (nr >> 4) {
172  tmp = (nr >> 4) - 1;
173  asm volatile (
174  "1: "
175  "movel %2@,%0@+; "
176  "movel %2@,%0@+; "
177  "movel %2@,%0@+; "
178  "movel %2@,%0@+; "
179  "movel %2@,%0@+; "
180  "movel %2@,%0@+; "
181  "movel %2@,%0@+; "
182  "movel %2@,%0@+; "
183  "movel %2@,%0@+; "
184  "movel %2@,%0@+; "
185  "movel %2@,%0@+; "
186  "movel %2@,%0@+; "
187  "movel %2@,%0@+; "
188  "movel %2@,%0@+; "
189  "movel %2@,%0@+; "
190  "movel %2@,%0@+; "
191  "dbra %1,1b"
192  : "=a" (buf), "=d" (tmp)
193  : "a" (port), "0" (buf),
194  "1" (tmp));
195  }
196 }
197 
198 static inline void raw_outsl(volatile u32 __iomem *port, const u32 *buf,
199  unsigned int nr)
200 {
201  unsigned int tmp;
202 
203  if (nr & 15) {
204  tmp = (nr & 15) - 1;
205  asm volatile (
206  "1: movel %0@+,%2@; dbra %1,1b"
207  : "=a" (buf), "=d" (tmp)
208  : "a" (port), "0" (buf),
209  "1" (tmp));
210  }
211  if (nr >> 4) {
212  tmp = (nr >> 4) - 1;
213  asm volatile (
214  "1: "
215  "movel %0@+,%2@; "
216  "movel %0@+,%2@; "
217  "movel %0@+,%2@; "
218  "movel %0@+,%2@; "
219  "movel %0@+,%2@; "
220  "movel %0@+,%2@; "
221  "movel %0@+,%2@; "
222  "movel %0@+,%2@; "
223  "movel %0@+,%2@; "
224  "movel %0@+,%2@; "
225  "movel %0@+,%2@; "
226  "movel %0@+,%2@; "
227  "movel %0@+,%2@; "
228  "movel %0@+,%2@; "
229  "movel %0@+,%2@; "
230  "movel %0@+,%2@; "
231  "dbra %1,1b"
232  : "=a" (buf), "=d" (tmp)
233  : "a" (port), "0" (buf),
234  "1" (tmp));
235  }
236 }
237 
238 
239 static inline void raw_insw_swapw(volatile u16 __iomem *port, u16 *buf,
240  unsigned int nr)
241 {
242  if ((nr) % 8)
243  __asm__ __volatile__
244  ("\tmovel %0,%/a0\n\t"
245  "movel %1,%/a1\n\t"
246  "movel %2,%/d6\n\t"
247  "subql #1,%/d6\n"
248  "1:\tmovew %/a0@,%/d0\n\t"
249  "rolw #8,%/d0\n\t"
250  "movew %/d0,%/a1@+\n\t"
251  "dbra %/d6,1b"
252  :
253  : "g" (port), "g" (buf), "g" (nr)
254  : "d0", "a0", "a1", "d6");
255  else
256  __asm__ __volatile__
257  ("movel %0,%/a0\n\t"
258  "movel %1,%/a1\n\t"
259  "movel %2,%/d6\n\t"
260  "lsrl #3,%/d6\n\t"
261  "subql #1,%/d6\n"
262  "1:\tmovew %/a0@,%/d0\n\t"
263  "rolw #8,%/d0\n\t"
264  "movew %/d0,%/a1@+\n\t"
265  "movew %/a0@,%/d0\n\t"
266  "rolw #8,%/d0\n\t"
267  "movew %/d0,%/a1@+\n\t"
268  "movew %/a0@,%/d0\n\t"
269  "rolw #8,%/d0\n\t"
270  "movew %/d0,%/a1@+\n\t"
271  "movew %/a0@,%/d0\n\t"
272  "rolw #8,%/d0\n\t"
273  "movew %/d0,%/a1@+\n\t"
274  "movew %/a0@,%/d0\n\t"
275  "rolw #8,%/d0\n\t"
276  "movew %/d0,%/a1@+\n\t"
277  "movew %/a0@,%/d0\n\t"
278  "rolw #8,%/d0\n\t"
279  "movew %/d0,%/a1@+\n\t"
280  "movew %/a0@,%/d0\n\t"
281  "rolw #8,%/d0\n\t"
282  "movew %/d0,%/a1@+\n\t"
283  "movew %/a0@,%/d0\n\t"
284  "rolw #8,%/d0\n\t"
285  "movew %/d0,%/a1@+\n\t"
286  "dbra %/d6,1b"
287  :
288  : "g" (port), "g" (buf), "g" (nr)
289  : "d0", "a0", "a1", "d6");
290 }
291 
292 static inline void raw_outsw_swapw(volatile u16 __iomem *port, const u16 *buf,
293  unsigned int nr)
294 {
295  if ((nr) % 8)
296  __asm__ __volatile__
297  ("movel %0,%/a0\n\t"
298  "movel %1,%/a1\n\t"
299  "movel %2,%/d6\n\t"
300  "subql #1,%/d6\n"
301  "1:\tmovew %/a1@+,%/d0\n\t"
302  "rolw #8,%/d0\n\t"
303  "movew %/d0,%/a0@\n\t"
304  "dbra %/d6,1b"
305  :
306  : "g" (port), "g" (buf), "g" (nr)
307  : "d0", "a0", "a1", "d6");
308  else
309  __asm__ __volatile__
310  ("movel %0,%/a0\n\t"
311  "movel %1,%/a1\n\t"
312  "movel %2,%/d6\n\t"
313  "lsrl #3,%/d6\n\t"
314  "subql #1,%/d6\n"
315  "1:\tmovew %/a1@+,%/d0\n\t"
316  "rolw #8,%/d0\n\t"
317  "movew %/d0,%/a0@\n\t"
318  "movew %/a1@+,%/d0\n\t"
319  "rolw #8,%/d0\n\t"
320  "movew %/d0,%/a0@\n\t"
321  "movew %/a1@+,%/d0\n\t"
322  "rolw #8,%/d0\n\t"
323  "movew %/d0,%/a0@\n\t"
324  "movew %/a1@+,%/d0\n\t"
325  "rolw #8,%/d0\n\t"
326  "movew %/d0,%/a0@\n\t"
327  "movew %/a1@+,%/d0\n\t"
328  "rolw #8,%/d0\n\t"
329  "movew %/d0,%/a0@\n\t"
330  "movew %/a1@+,%/d0\n\t"
331  "rolw #8,%/d0\n\t"
332  "movew %/d0,%/a0@\n\t"
333  "movew %/a1@+,%/d0\n\t"
334  "rolw #8,%/d0\n\t"
335  "movew %/d0,%/a0@\n\t"
336  "movew %/a1@+,%/d0\n\t"
337  "rolw #8,%/d0\n\t"
338  "movew %/d0,%/a0@\n\t"
339  "dbra %/d6,1b"
340  :
341  : "g" (port), "g" (buf), "g" (nr)
342  : "d0", "a0", "a1", "d6");
343 }
344 
345 #endif /* __KERNEL__ */
346 
347 #endif /* _RAW_IO_H */
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