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1da177e4 LT |
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 | ||
113 | static inline unsigned int jensen_local_inb(unsigned long addr) | |
114 | { | |
115 | return 0xff & *(vuip)((addr << 9) + EISA_VL82C106); | |
116 | } | |
117 | ||
118 | static inline void jensen_local_outb(u8 b, unsigned long addr) | |
119 | { | |
120 | *(vuip)((addr << 9) + EISA_VL82C106) = b; | |
121 | mb(); | |
122 | } | |
123 | ||
124 | static 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 | ||
133 | static 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 | ||
322 | IOPORT(b, 8) | |
323 | IOPORT(w, 16) | |
324 | IOPORT(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 */ |