Contents of /alx-src/tags/kernel26-2.6.12-alx-r9/include/asm-alpha/jensen.h
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Wed Mar 4 11:03:09 2009 UTC (15 years, 3 months ago) by niro
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Wed Mar 4 11:03:09 2009 UTC (15 years, 3 months ago) by niro
File MIME type: text/plain
File size: 8550 byte(s)
Tag kernel26-2.6.12-alx-r9
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 */ |