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-rw-r--r--include/asm-alpha/jensen.h346
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diff --git a/include/asm-alpha/jensen.h b/include/asm-alpha/jensen.h
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--- a/include/asm-alpha/jensen.h
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1#ifndef __ALPHA_JENSEN_H
2#define __ALPHA_JENSEN_H
3
4#include <asm/compiler.h>
5
6/*
7 * Defines for the AlphaPC EISA IO and memory address space.
8 */
9
10/*
11 * NOTE! The memory operations do not set any memory barriers, as it's
12 * not needed for cases like a frame buffer that is essentially memory-like.
13 * You need to do them by hand if the operations depend on ordering.
14 *
15 * Similarly, the port IO operations do a "mb" only after a write operation:
16 * if an mb is needed before (as in the case of doing memory mapped IO
17 * first, and then a port IO operation to the same device), it needs to be
18 * done by hand.
19 *
20 * After the above has bitten me 100 times, I'll give up and just do the
21 * mb all the time, but right now I'm hoping this will work out. Avoiding
22 * mb's may potentially be a noticeable speed improvement, but I can't
23 * honestly say I've tested it.
24 *
25 * Handling interrupts that need to do mb's to synchronize to non-interrupts
26 * is another fun race area. Don't do it (because if you do, I'll have to
27 * do *everything* with interrupts disabled, ugh).
28 */
29
30/*
31 * EISA Interrupt Acknowledge address
32 */
33#define EISA_INTA (IDENT_ADDR + 0x100000000UL)
34
35/*
36 * FEPROM addresses
37 */
38#define EISA_FEPROM0 (IDENT_ADDR + 0x180000000UL)
39#define EISA_FEPROM1 (IDENT_ADDR + 0x1A0000000UL)
40
41/*
42 * VL82C106 base address
43 */
44#define EISA_VL82C106 (IDENT_ADDR + 0x1C0000000UL)
45
46/*
47 * EISA "Host Address Extension" address (bits 25-31 of the EISA address)
48 */
49#define EISA_HAE (IDENT_ADDR + 0x1D0000000UL)
50
51/*
52 * "SYSCTL" register address
53 */
54#define EISA_SYSCTL (IDENT_ADDR + 0x1E0000000UL)
55
56/*
57 * "spare" register address
58 */
59#define EISA_SPARE (IDENT_ADDR + 0x1F0000000UL)
60
61/*
62 * EISA memory address offset
63 */
64#define EISA_MEM (IDENT_ADDR + 0x200000000UL)
65
66/*
67 * EISA IO address offset
68 */
69#define EISA_IO (IDENT_ADDR + 0x300000000UL)
70
71
72#ifdef __KERNEL__
73
74#ifndef __EXTERN_INLINE
75#define __EXTERN_INLINE extern inline
76#define __IO_EXTERN_INLINE
77#endif
78
79/*
80 * Handle the "host address register". This needs to be set
81 * to the high 7 bits of the EISA address. This is also needed
82 * for EISA IO addresses, which are only 16 bits wide (the
83 * hae needs to be set to 0).
84 *
85 * HAE isn't needed for the local IO operations, though.
86 */
87
88#define JENSEN_HAE_ADDRESS EISA_HAE
89#define JENSEN_HAE_MASK 0x1ffffff
90
91__EXTERN_INLINE void jensen_set_hae(unsigned long addr)
92{
93 /* hae on the Jensen is bits 31:25 shifted right */
94 addr >>= 25;
95 if (addr != alpha_mv.hae_cache)
96 set_hae(addr);
97}
98
99#define vuip volatile unsigned int *
100
101/*
102 * IO functions
103 *
104 * The "local" functions are those that don't go out to the EISA bus,
105 * but instead act on the VL82C106 chip directly.. This is mainly the
106 * keyboard, RTC, printer and first two serial lines..
107 *
108 * The local stuff makes for some complications, but it seems to be
109 * gone in the PCI version. I hope I can get DEC suckered^H^H^H^H^H^H^H^H
110 * convinced that I need one of the newer machines.
111 */
112
113static inline unsigned int jensen_local_inb(unsigned long addr)
114{
115 return 0xff & *(vuip)((addr << 9) + EISA_VL82C106);
116}
117
118static inline void jensen_local_outb(u8 b, unsigned long addr)
119{
120 *(vuip)((addr << 9) + EISA_VL82C106) = b;
121 mb();
122}
123
124static inline unsigned int jensen_bus_inb(unsigned long addr)
125{
126 long result;
127
128 jensen_set_hae(0);
129 result = *(volatile int *)((addr << 7) + EISA_IO + 0x00);
130 return __kernel_extbl(result, addr & 3);
131}
132
133static inline void jensen_bus_outb(u8 b, unsigned long addr)
134{
135 jensen_set_hae(0);
136 *(vuip)((addr << 7) + EISA_IO + 0x00) = b * 0x01010101;
137 mb();
138}
139
140/*
141 * It seems gcc is not very good at optimizing away logical
142 * operations that result in operations across inline functions.
143 * Which is why this is a macro.
144 */
145
146#define jensen_is_local(addr) ( \
147/* keyboard */ (addr == 0x60 || addr == 0x64) || \
148/* RTC */ (addr == 0x170 || addr == 0x171) || \
149/* mb COM2 */ (addr >= 0x2f8 && addr <= 0x2ff) || \
150/* mb LPT1 */ (addr >= 0x3bc && addr <= 0x3be) || \
151/* mb COM2 */ (addr >= 0x3f8 && addr <= 0x3ff))
152
153__EXTERN_INLINE u8 jensen_inb(unsigned long addr)
154{
155 if (jensen_is_local(addr))
156 return jensen_local_inb(addr);
157 else
158 return jensen_bus_inb(addr);
159}
160
161__EXTERN_INLINE void jensen_outb(u8 b, unsigned long addr)
162{
163 if (jensen_is_local(addr))
164 jensen_local_outb(b, addr);
165 else
166 jensen_bus_outb(b, addr);
167}
168
169__EXTERN_INLINE u16 jensen_inw(unsigned long addr)
170{
171 long result;
172
173 jensen_set_hae(0);
174 result = *(volatile int *) ((addr << 7) + EISA_IO + 0x20);
175 result >>= (addr & 3) * 8;
176 return 0xffffUL & result;
177}
178
179__EXTERN_INLINE u32 jensen_inl(unsigned long addr)
180{
181 jensen_set_hae(0);
182 return *(vuip) ((addr << 7) + EISA_IO + 0x60);
183}
184
185__EXTERN_INLINE void jensen_outw(u16 b, unsigned long addr)
186{
187 jensen_set_hae(0);
188 *(vuip) ((addr << 7) + EISA_IO + 0x20) = b * 0x00010001;
189 mb();
190}
191
192__EXTERN_INLINE void jensen_outl(u32 b, unsigned long addr)
193{
194 jensen_set_hae(0);
195 *(vuip) ((addr << 7) + EISA_IO + 0x60) = b;
196 mb();
197}
198
199/*
200 * Memory functions.
201 */
202
203__EXTERN_INLINE u8 jensen_readb(const volatile void __iomem *xaddr)
204{
205 unsigned long addr = (unsigned long) xaddr;
206 long result;
207
208 jensen_set_hae(addr);
209 addr &= JENSEN_HAE_MASK;
210 result = *(volatile int *) ((addr << 7) + EISA_MEM + 0x00);
211 result >>= (addr & 3) * 8;
212 return 0xffUL & result;
213}
214
215__EXTERN_INLINE u16 jensen_readw(const volatile void __iomem *xaddr)
216{
217 unsigned long addr = (unsigned long) xaddr;
218 long result;
219
220 jensen_set_hae(addr);
221 addr &= JENSEN_HAE_MASK;
222 result = *(volatile int *) ((addr << 7) + EISA_MEM + 0x20);
223 result >>= (addr & 3) * 8;
224 return 0xffffUL & result;
225}
226
227__EXTERN_INLINE u32 jensen_readl(const volatile void __iomem *xaddr)
228{
229 unsigned long addr = (unsigned long) xaddr;
230 jensen_set_hae(addr);
231 addr &= JENSEN_HAE_MASK;
232 return *(vuip) ((addr << 7) + EISA_MEM + 0x60);
233}
234
235__EXTERN_INLINE u64 jensen_readq(const volatile void __iomem *xaddr)
236{
237 unsigned long addr = (unsigned long) xaddr;
238 unsigned long r0, r1;
239
240 jensen_set_hae(addr);
241 addr &= JENSEN_HAE_MASK;
242 addr = (addr << 7) + EISA_MEM + 0x60;
243 r0 = *(vuip) (addr);
244 r1 = *(vuip) (addr + (4 << 7));
245 return r1 << 32 | r0;
246}
247
248__EXTERN_INLINE void jensen_writeb(u8 b, volatile void __iomem *xaddr)
249{
250 unsigned long addr = (unsigned long) xaddr;
251 jensen_set_hae(addr);
252 addr &= JENSEN_HAE_MASK;
253 *(vuip) ((addr << 7) + EISA_MEM + 0x00) = b * 0x01010101;
254}
255
256__EXTERN_INLINE void jensen_writew(u16 b, volatile void __iomem *xaddr)
257{
258 unsigned long addr = (unsigned long) xaddr;
259 jensen_set_hae(addr);
260 addr &= JENSEN_HAE_MASK;
261 *(vuip) ((addr << 7) + EISA_MEM + 0x20) = b * 0x00010001;
262}
263
264__EXTERN_INLINE void jensen_writel(u32 b, volatile void __iomem *xaddr)
265{
266 unsigned long addr = (unsigned long) xaddr;
267 jensen_set_hae(addr);
268 addr &= JENSEN_HAE_MASK;
269 *(vuip) ((addr << 7) + EISA_MEM + 0x60) = b;
270}
271
272__EXTERN_INLINE void jensen_writeq(u64 b, volatile void __iomem *xaddr)
273{
274 unsigned long addr = (unsigned long) xaddr;
275 jensen_set_hae(addr);
276 addr &= JENSEN_HAE_MASK;
277 addr = (addr << 7) + EISA_MEM + 0x60;
278 *(vuip) (addr) = b;
279 *(vuip) (addr + (4 << 7)) = b >> 32;
280}
281
282__EXTERN_INLINE void __iomem *jensen_ioportmap(unsigned long addr)
283{
284 return (void __iomem *)addr;
285}
286
287__EXTERN_INLINE void __iomem *jensen_ioremap(unsigned long addr,
288 unsigned long size)
289{
290 return (void __iomem *)(addr + 0x100000000ul);
291}
292
293__EXTERN_INLINE int jensen_is_ioaddr(unsigned long addr)
294{
295 return (long)addr >= 0;
296}
297
298__EXTERN_INLINE int jensen_is_mmio(const volatile void __iomem *addr)
299{
300 return (unsigned long)addr >= 0x100000000ul;
301}
302
303/* New-style ioread interface. All the routines are so ugly for Jensen
304 that it doesn't make sense to merge them. */
305
306#define IOPORT(OS, NS) \
307__EXTERN_INLINE unsigned int jensen_ioread##NS(void __iomem *xaddr) \
308{ \
309 if (jensen_is_mmio(xaddr)) \
310 return jensen_read##OS(xaddr - 0x100000000ul); \
311 else \
312 return jensen_in##OS((unsigned long)xaddr); \
313} \
314__EXTERN_INLINE void jensen_iowrite##NS(u##NS b, void __iomem *xaddr) \
315{ \
316 if (jensen_is_mmio(xaddr)) \
317 jensen_write##OS(b, xaddr - 0x100000000ul); \
318 else \
319 jensen_out##OS(b, (unsigned long)xaddr); \
320}
321
322IOPORT(b, 8)
323IOPORT(w, 16)
324IOPORT(l, 32)
325
326#undef IOPORT
327
328#undef vuip
329
330#undef __IO_PREFIX
331#define __IO_PREFIX jensen
332#define jensen_trivial_rw_bw 0
333#define jensen_trivial_rw_lq 0
334#define jensen_trivial_io_bw 0
335#define jensen_trivial_io_lq 0
336#define jensen_trivial_iounmap 1
337#include <asm/io_trivial.h>
338
339#ifdef __IO_EXTERN_INLINE
340#undef __EXTERN_INLINE
341#undef __IO_EXTERN_INLINE
342#endif
343
344#endif /* __KERNEL__ */
345
346#endif /* __ALPHA_JENSEN_H */
generated by cgit v1.2.2 (git 2.25.0) at 2024-12-20 12:18:13 -0500