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b2441318 | 1 | /* SPDX-License-Identifier: GPL-2.0 */ |
1da177e4 LT |
2 | #ifndef __ALPHA_JENSEN_H |
3 | #define __ALPHA_JENSEN_H | |
4 | ||
5 | #include <asm/compiler.h> | |
6 | ||
7 | /* | |
8 | * Defines for the AlphaPC EISA IO and memory address space. | |
9 | */ | |
10 | ||
11 | /* | |
12 | * NOTE! The memory operations do not set any memory barriers, as it's | |
13 | * not needed for cases like a frame buffer that is essentially memory-like. | |
14 | * You need to do them by hand if the operations depend on ordering. | |
15 | * | |
16 | * Similarly, the port IO operations do a "mb" only after a write operation: | |
17 | * if an mb is needed before (as in the case of doing memory mapped IO | |
18 | * first, and then a port IO operation to the same device), it needs to be | |
19 | * done by hand. | |
20 | * | |
21 | * After the above has bitten me 100 times, I'll give up and just do the | |
22 | * mb all the time, but right now I'm hoping this will work out. Avoiding | |
23 | * mb's may potentially be a noticeable speed improvement, but I can't | |
24 | * honestly say I've tested it. | |
25 | * | |
26 | * Handling interrupts that need to do mb's to synchronize to non-interrupts | |
27 | * is another fun race area. Don't do it (because if you do, I'll have to | |
28 | * do *everything* with interrupts disabled, ugh). | |
29 | */ | |
30 | ||
31 | /* | |
32 | * EISA Interrupt Acknowledge address | |
33 | */ | |
34 | #define EISA_INTA (IDENT_ADDR + 0x100000000UL) | |
35 | ||
36 | /* | |
37 | * FEPROM addresses | |
38 | */ | |
39 | #define EISA_FEPROM0 (IDENT_ADDR + 0x180000000UL) | |
40 | #define EISA_FEPROM1 (IDENT_ADDR + 0x1A0000000UL) | |
41 | ||
42 | /* | |
43 | * VL82C106 base address | |
44 | */ | |
45 | #define EISA_VL82C106 (IDENT_ADDR + 0x1C0000000UL) | |
46 | ||
47 | /* | |
48 | * EISA "Host Address Extension" address (bits 25-31 of the EISA address) | |
49 | */ | |
50 | #define EISA_HAE (IDENT_ADDR + 0x1D0000000UL) | |
51 | ||
52 | /* | |
53 | * "SYSCTL" register address | |
54 | */ | |
55 | #define EISA_SYSCTL (IDENT_ADDR + 0x1E0000000UL) | |
56 | ||
57 | /* | |
58 | * "spare" register address | |
59 | */ | |
60 | #define EISA_SPARE (IDENT_ADDR + 0x1F0000000UL) | |
61 | ||
62 | /* | |
63 | * EISA memory address offset | |
64 | */ | |
65 | #define EISA_MEM (IDENT_ADDR + 0x200000000UL) | |
66 | ||
67 | /* | |
68 | * EISA IO address offset | |
69 | */ | |
70 | #define EISA_IO (IDENT_ADDR + 0x300000000UL) | |
71 | ||
72 | ||
73 | #ifdef __KERNEL__ | |
74 | ||
75 | #ifndef __EXTERN_INLINE | |
76 | #define __EXTERN_INLINE extern inline | |
77 | #define __IO_EXTERN_INLINE | |
78 | #endif | |
79 | ||
80 | /* | |
81 | * Handle the "host address register". This needs to be set | |
82 | * to the high 7 bits of the EISA address. This is also needed | |
83 | * for EISA IO addresses, which are only 16 bits wide (the | |
84 | * hae needs to be set to 0). | |
85 | * | |
86 | * HAE isn't needed for the local IO operations, though. | |
87 | */ | |
88 | ||
89 | #define JENSEN_HAE_ADDRESS EISA_HAE | |
90 | #define JENSEN_HAE_MASK 0x1ffffff | |
91 | ||
92 | __EXTERN_INLINE void jensen_set_hae(unsigned long addr) | |
93 | { | |
94 | /* hae on the Jensen is bits 31:25 shifted right */ | |
95 | addr >>= 25; | |
96 | if (addr != alpha_mv.hae_cache) | |
97 | set_hae(addr); | |
98 | } | |
99 | ||
100 | #define vuip volatile unsigned int * | |
101 | ||
102 | /* | |
103 | * IO functions | |
104 | * | |
105 | * The "local" functions are those that don't go out to the EISA bus, | |
106 | * but instead act on the VL82C106 chip directly.. This is mainly the | |
107 | * keyboard, RTC, printer and first two serial lines.. | |
108 | * | |
109 | * The local stuff makes for some complications, but it seems to be | |
110 | * gone in the PCI version. I hope I can get DEC suckered^H^H^H^H^H^H^H^H | |
111 | * convinced that I need one of the newer machines. | |
112 | */ | |
113 | ||
cc9d3aaa | 114 | __EXTERN_INLINE unsigned int jensen_local_inb(unsigned long addr) |
1da177e4 LT |
115 | { |
116 | return 0xff & *(vuip)((addr << 9) + EISA_VL82C106); | |
117 | } | |
118 | ||
cc9d3aaa | 119 | __EXTERN_INLINE void jensen_local_outb(u8 b, unsigned long addr) |
1da177e4 LT |
120 | { |
121 | *(vuip)((addr << 9) + EISA_VL82C106) = b; | |
122 | mb(); | |
123 | } | |
124 | ||
cc9d3aaa | 125 | __EXTERN_INLINE unsigned int jensen_bus_inb(unsigned long addr) |
1da177e4 LT |
126 | { |
127 | long result; | |
128 | ||
129 | jensen_set_hae(0); | |
130 | result = *(volatile int *)((addr << 7) + EISA_IO + 0x00); | |
131 | return __kernel_extbl(result, addr & 3); | |
132 | } | |
133 | ||
cc9d3aaa | 134 | __EXTERN_INLINE void jensen_bus_outb(u8 b, unsigned long addr) |
1da177e4 LT |
135 | { |
136 | jensen_set_hae(0); | |
137 | *(vuip)((addr << 7) + EISA_IO + 0x00) = b * 0x01010101; | |
138 | mb(); | |
139 | } | |
140 | ||
141 | /* | |
142 | * It seems gcc is not very good at optimizing away logical | |
143 | * operations that result in operations across inline functions. | |
144 | * Which is why this is a macro. | |
145 | */ | |
146 | ||
147 | #define jensen_is_local(addr) ( \ | |
148 | /* keyboard */ (addr == 0x60 || addr == 0x64) || \ | |
149 | /* RTC */ (addr == 0x170 || addr == 0x171) || \ | |
150 | /* mb COM2 */ (addr >= 0x2f8 && addr <= 0x2ff) || \ | |
151 | /* mb LPT1 */ (addr >= 0x3bc && addr <= 0x3be) || \ | |
152 | /* mb COM2 */ (addr >= 0x3f8 && addr <= 0x3ff)) | |
153 | ||
154 | __EXTERN_INLINE u8 jensen_inb(unsigned long addr) | |
155 | { | |
156 | if (jensen_is_local(addr)) | |
157 | return jensen_local_inb(addr); | |
158 | else | |
159 | return jensen_bus_inb(addr); | |
160 | } | |
161 | ||
162 | __EXTERN_INLINE void jensen_outb(u8 b, unsigned long addr) | |
163 | { | |
164 | if (jensen_is_local(addr)) | |
165 | jensen_local_outb(b, addr); | |
166 | else | |
167 | jensen_bus_outb(b, addr); | |
168 | } | |
169 | ||
170 | __EXTERN_INLINE u16 jensen_inw(unsigned long addr) | |
171 | { | |
172 | long result; | |
173 | ||
174 | jensen_set_hae(0); | |
175 | result = *(volatile int *) ((addr << 7) + EISA_IO + 0x20); | |
176 | result >>= (addr & 3) * 8; | |
177 | return 0xffffUL & result; | |
178 | } | |
179 | ||
180 | __EXTERN_INLINE u32 jensen_inl(unsigned long addr) | |
181 | { | |
182 | jensen_set_hae(0); | |
183 | return *(vuip) ((addr << 7) + EISA_IO + 0x60); | |
184 | } | |
185 | ||
186 | __EXTERN_INLINE void jensen_outw(u16 b, unsigned long addr) | |
187 | { | |
188 | jensen_set_hae(0); | |
189 | *(vuip) ((addr << 7) + EISA_IO + 0x20) = b * 0x00010001; | |
190 | mb(); | |
191 | } | |
192 | ||
193 | __EXTERN_INLINE void jensen_outl(u32 b, unsigned long addr) | |
194 | { | |
195 | jensen_set_hae(0); | |
196 | *(vuip) ((addr << 7) + EISA_IO + 0x60) = b; | |
197 | mb(); | |
198 | } | |
199 | ||
200 | /* | |
201 | * Memory functions. | |
202 | */ | |
203 | ||
204 | __EXTERN_INLINE u8 jensen_readb(const volatile void __iomem *xaddr) | |
205 | { | |
206 | unsigned long addr = (unsigned long) xaddr; | |
207 | long result; | |
208 | ||
209 | jensen_set_hae(addr); | |
210 | addr &= JENSEN_HAE_MASK; | |
211 | result = *(volatile int *) ((addr << 7) + EISA_MEM + 0x00); | |
212 | result >>= (addr & 3) * 8; | |
213 | return 0xffUL & result; | |
214 | } | |
215 | ||
216 | __EXTERN_INLINE u16 jensen_readw(const volatile void __iomem *xaddr) | |
217 | { | |
218 | unsigned long addr = (unsigned long) xaddr; | |
219 | long result; | |
220 | ||
221 | jensen_set_hae(addr); | |
222 | addr &= JENSEN_HAE_MASK; | |
223 | result = *(volatile int *) ((addr << 7) + EISA_MEM + 0x20); | |
224 | result >>= (addr & 3) * 8; | |
225 | return 0xffffUL & result; | |
226 | } | |
227 | ||
228 | __EXTERN_INLINE u32 jensen_readl(const volatile void __iomem *xaddr) | |
229 | { | |
230 | unsigned long addr = (unsigned long) xaddr; | |
231 | jensen_set_hae(addr); | |
232 | addr &= JENSEN_HAE_MASK; | |
233 | return *(vuip) ((addr << 7) + EISA_MEM + 0x60); | |
234 | } | |
235 | ||
236 | __EXTERN_INLINE u64 jensen_readq(const volatile void __iomem *xaddr) | |
237 | { | |
238 | unsigned long addr = (unsigned long) xaddr; | |
239 | unsigned long r0, r1; | |
240 | ||
241 | jensen_set_hae(addr); | |
242 | addr &= JENSEN_HAE_MASK; | |
243 | addr = (addr << 7) + EISA_MEM + 0x60; | |
244 | r0 = *(vuip) (addr); | |
245 | r1 = *(vuip) (addr + (4 << 7)); | |
246 | return r1 << 32 | r0; | |
247 | } | |
248 | ||
249 | __EXTERN_INLINE void jensen_writeb(u8 b, volatile void __iomem *xaddr) | |
250 | { | |
251 | unsigned long addr = (unsigned long) xaddr; | |
252 | jensen_set_hae(addr); | |
253 | addr &= JENSEN_HAE_MASK; | |
254 | *(vuip) ((addr << 7) + EISA_MEM + 0x00) = b * 0x01010101; | |
255 | } | |
256 | ||
257 | __EXTERN_INLINE void jensen_writew(u16 b, volatile void __iomem *xaddr) | |
258 | { | |
259 | unsigned long addr = (unsigned long) xaddr; | |
260 | jensen_set_hae(addr); | |
261 | addr &= JENSEN_HAE_MASK; | |
262 | *(vuip) ((addr << 7) + EISA_MEM + 0x20) = b * 0x00010001; | |
263 | } | |
264 | ||
265 | __EXTERN_INLINE void jensen_writel(u32 b, volatile void __iomem *xaddr) | |
266 | { | |
267 | unsigned long addr = (unsigned long) xaddr; | |
268 | jensen_set_hae(addr); | |
269 | addr &= JENSEN_HAE_MASK; | |
270 | *(vuip) ((addr << 7) + EISA_MEM + 0x60) = b; | |
271 | } | |
272 | ||
273 | __EXTERN_INLINE void jensen_writeq(u64 b, volatile void __iomem *xaddr) | |
274 | { | |
275 | unsigned long addr = (unsigned long) xaddr; | |
276 | jensen_set_hae(addr); | |
277 | addr &= JENSEN_HAE_MASK; | |
278 | addr = (addr << 7) + EISA_MEM + 0x60; | |
279 | *(vuip) (addr) = b; | |
280 | *(vuip) (addr + (4 << 7)) = b >> 32; | |
281 | } | |
282 | ||
283 | __EXTERN_INLINE void __iomem *jensen_ioportmap(unsigned long addr) | |
284 | { | |
285 | return (void __iomem *)addr; | |
286 | } | |
287 | ||
288 | __EXTERN_INLINE void __iomem *jensen_ioremap(unsigned long addr, | |
289 | unsigned long size) | |
290 | { | |
291 | return (void __iomem *)(addr + 0x100000000ul); | |
292 | } | |
293 | ||
294 | __EXTERN_INLINE int jensen_is_ioaddr(unsigned long addr) | |
295 | { | |
296 | return (long)addr >= 0; | |
297 | } | |
298 | ||
299 | __EXTERN_INLINE int jensen_is_mmio(const volatile void __iomem *addr) | |
300 | { | |
301 | return (unsigned long)addr >= 0x100000000ul; | |
302 | } | |
303 | ||
304 | /* New-style ioread interface. All the routines are so ugly for Jensen | |
305 | that it doesn't make sense to merge them. */ | |
306 | ||
307 | #define IOPORT(OS, NS) \ | |
8f28ca6b | 308 | __EXTERN_INLINE unsigned int jensen_ioread##NS(const void __iomem *xaddr) \ |
1da177e4 LT |
309 | { \ |
310 | if (jensen_is_mmio(xaddr)) \ | |
311 | return jensen_read##OS(xaddr - 0x100000000ul); \ | |
312 | else \ | |
313 | return jensen_in##OS((unsigned long)xaddr); \ | |
314 | } \ | |
315 | __EXTERN_INLINE void jensen_iowrite##NS(u##NS b, void __iomem *xaddr) \ | |
316 | { \ | |
317 | if (jensen_is_mmio(xaddr)) \ | |
318 | jensen_write##OS(b, xaddr - 0x100000000ul); \ | |
319 | else \ | |
320 | jensen_out##OS(b, (unsigned long)xaddr); \ | |
321 | } | |
322 | ||
323 | IOPORT(b, 8) | |
324 | IOPORT(w, 16) | |
325 | IOPORT(l, 32) | |
326 | ||
327 | #undef IOPORT | |
328 | ||
329 | #undef vuip | |
330 | ||
331 | #undef __IO_PREFIX | |
332 | #define __IO_PREFIX jensen | |
333 | #define jensen_trivial_rw_bw 0 | |
334 | #define jensen_trivial_rw_lq 0 | |
335 | #define jensen_trivial_io_bw 0 | |
336 | #define jensen_trivial_io_lq 0 | |
337 | #define jensen_trivial_iounmap 1 | |
338 | #include <asm/io_trivial.h> | |
339 | ||
340 | #ifdef __IO_EXTERN_INLINE | |
341 | #undef __EXTERN_INLINE | |
342 | #undef __IO_EXTERN_INLINE | |
343 | #endif | |
344 | ||
345 | #endif /* __KERNEL__ */ | |
346 | ||
347 | #endif /* __ALPHA_JENSEN_H */ |