1 /* SPDX-License-Identifier: GPL-2.0 */
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
jensen_set_hae(unsigned long addr)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 #define vulp volatile unsigned long *
102
103 /*
104 * IO functions
105 *
106 * The "local" functions are those that don't go out to the EISA bus,
107 * but instead act on the VL82C106 chip directly.. This is mainly the
108 * keyboard, RTC, printer and first two serial lines..
109 *
110 * The local stuff makes for some complications, but it seems to be
111 * gone in the PCI version. I hope I can get DEC suckered^H^H^H^H^H^H^H^H
112 * convinced that I need one of the newer machines.
113 */
114
jensen_local_inb(unsigned long addr)115 __EXTERN_INLINE unsigned int jensen_local_inb(unsigned long addr)
116 {
117 return 0xff & *(vuip)((addr << 9) + EISA_VL82C106);
118 }
119
jensen_local_outb(u8 b,unsigned long addr)120 __EXTERN_INLINE void jensen_local_outb(u8 b, unsigned long addr)
121 {
122 *(vuip)((addr << 9) + EISA_VL82C106) = b;
123 mb();
124 }
125
jensen_bus_inb(unsigned long addr)126 __EXTERN_INLINE unsigned int jensen_bus_inb(unsigned long addr)
127 {
128 long result;
129
130 jensen_set_hae(0);
131 result = *(volatile int *)((addr << 7) + EISA_IO + 0x00);
132 return __kernel_extbl(result, addr & 3);
133 }
134
jensen_bus_outb(u8 b,unsigned long addr)135 __EXTERN_INLINE void jensen_bus_outb(u8 b, unsigned long addr)
136 {
137 jensen_set_hae(0);
138 *(vuip)((addr << 7) + EISA_IO + 0x00) = b * 0x01010101;
139 mb();
140 }
141
142 /*
143 * It seems gcc is not very good at optimizing away logical
144 * operations that result in operations across inline functions.
145 * Which is why this is a macro.
146 */
147
148 #define jensen_is_local(addr) ( \
149 /* keyboard */ (addr == 0x60 || addr == 0x64) || \
150 /* RTC */ (addr == 0x170 || addr == 0x171) || \
151 /* mb COM2 */ (addr >= 0x2f8 && addr <= 0x2ff) || \
152 /* mb LPT1 */ (addr >= 0x3bc && addr <= 0x3be) || \
153 /* mb COM2 */ (addr >= 0x3f8 && addr <= 0x3ff))
154
jensen_inb(unsigned long addr)155 __EXTERN_INLINE u8 jensen_inb(unsigned long addr)
156 {
157 if (jensen_is_local(addr))
158 return jensen_local_inb(addr);
159 else
160 return jensen_bus_inb(addr);
161 }
162
jensen_outb(u8 b,unsigned long addr)163 __EXTERN_INLINE void jensen_outb(u8 b, unsigned long addr)
164 {
165 if (jensen_is_local(addr))
166 jensen_local_outb(b, addr);
167 else
168 jensen_bus_outb(b, addr);
169 }
170
jensen_inw(unsigned long addr)171 __EXTERN_INLINE u16 jensen_inw(unsigned long addr)
172 {
173 long result;
174
175 jensen_set_hae(0);
176 result = *(volatile int *) ((addr << 7) + EISA_IO + 0x20);
177 result >>= (addr & 3) * 8;
178 return 0xffffUL & result;
179 }
180
jensen_inl(unsigned long addr)181 __EXTERN_INLINE u32 jensen_inl(unsigned long addr)
182 {
183 jensen_set_hae(0);
184 return *(vuip) ((addr << 7) + EISA_IO + 0x60);
185 }
186
jensen_inq(unsigned long addr)187 __EXTERN_INLINE u64 jensen_inq(unsigned long addr)
188 {
189 jensen_set_hae(0);
190 return *(vulp) ((addr << 7) + EISA_IO + 0x60);
191 }
192
jensen_outw(u16 b,unsigned long addr)193 __EXTERN_INLINE void jensen_outw(u16 b, unsigned long addr)
194 {
195 jensen_set_hae(0);
196 *(vuip) ((addr << 7) + EISA_IO + 0x20) = b * 0x00010001;
197 mb();
198 }
199
jensen_outl(u32 b,unsigned long addr)200 __EXTERN_INLINE void jensen_outl(u32 b, unsigned long addr)
201 {
202 jensen_set_hae(0);
203 *(vuip) ((addr << 7) + EISA_IO + 0x60) = b;
204 mb();
205 }
206
jensen_outq(u64 b,unsigned long addr)207 __EXTERN_INLINE void jensen_outq(u64 b, unsigned long addr)
208 {
209 jensen_set_hae(0);
210 *(vulp) ((addr << 7) + EISA_IO + 0x60) = b;
211 mb();
212 }
213
214 /*
215 * Memory functions.
216 */
217
jensen_readb(const volatile void __iomem * xaddr)218 __EXTERN_INLINE u8 jensen_readb(const volatile void __iomem *xaddr)
219 {
220 unsigned long addr = (unsigned long) xaddr;
221 long result;
222
223 jensen_set_hae(addr);
224 addr &= JENSEN_HAE_MASK;
225 result = *(volatile int *) ((addr << 7) + EISA_MEM + 0x00);
226 result >>= (addr & 3) * 8;
227 return 0xffUL & result;
228 }
229
jensen_readw(const volatile void __iomem * xaddr)230 __EXTERN_INLINE u16 jensen_readw(const volatile void __iomem *xaddr)
231 {
232 unsigned long addr = (unsigned long) xaddr;
233 long result;
234
235 jensen_set_hae(addr);
236 addr &= JENSEN_HAE_MASK;
237 result = *(volatile int *) ((addr << 7) + EISA_MEM + 0x20);
238 result >>= (addr & 3) * 8;
239 return 0xffffUL & result;
240 }
241
jensen_readl(const volatile void __iomem * xaddr)242 __EXTERN_INLINE u32 jensen_readl(const volatile void __iomem *xaddr)
243 {
244 unsigned long addr = (unsigned long) xaddr;
245 jensen_set_hae(addr);
246 addr &= JENSEN_HAE_MASK;
247 return *(vuip) ((addr << 7) + EISA_MEM + 0x60);
248 }
249
jensen_readq(const volatile void __iomem * xaddr)250 __EXTERN_INLINE u64 jensen_readq(const volatile void __iomem *xaddr)
251 {
252 unsigned long addr = (unsigned long) xaddr;
253 unsigned long r0, r1;
254
255 jensen_set_hae(addr);
256 addr &= JENSEN_HAE_MASK;
257 addr = (addr << 7) + EISA_MEM + 0x60;
258 r0 = *(vuip) (addr);
259 r1 = *(vuip) (addr + (4 << 7));
260 return r1 << 32 | r0;
261 }
262
jensen_writeb(u8 b,volatile void __iomem * xaddr)263 __EXTERN_INLINE void jensen_writeb(u8 b, volatile void __iomem *xaddr)
264 {
265 unsigned long addr = (unsigned long) xaddr;
266 jensen_set_hae(addr);
267 addr &= JENSEN_HAE_MASK;
268 *(vuip) ((addr << 7) + EISA_MEM + 0x00) = b * 0x01010101;
269 }
270
jensen_writew(u16 b,volatile void __iomem * xaddr)271 __EXTERN_INLINE void jensen_writew(u16 b, volatile void __iomem *xaddr)
272 {
273 unsigned long addr = (unsigned long) xaddr;
274 jensen_set_hae(addr);
275 addr &= JENSEN_HAE_MASK;
276 *(vuip) ((addr << 7) + EISA_MEM + 0x20) = b * 0x00010001;
277 }
278
jensen_writel(u32 b,volatile void __iomem * xaddr)279 __EXTERN_INLINE void jensen_writel(u32 b, volatile void __iomem *xaddr)
280 {
281 unsigned long addr = (unsigned long) xaddr;
282 jensen_set_hae(addr);
283 addr &= JENSEN_HAE_MASK;
284 *(vuip) ((addr << 7) + EISA_MEM + 0x60) = b;
285 }
286
jensen_writeq(u64 b,volatile void __iomem * xaddr)287 __EXTERN_INLINE void jensen_writeq(u64 b, volatile void __iomem *xaddr)
288 {
289 unsigned long addr = (unsigned long) xaddr;
290 jensen_set_hae(addr);
291 addr &= JENSEN_HAE_MASK;
292 addr = (addr << 7) + EISA_MEM + 0x60;
293 *(vuip) (addr) = b;
294 *(vuip) (addr + (4 << 7)) = b >> 32;
295 }
296
jensen_ioportmap(unsigned long addr)297 __EXTERN_INLINE void __iomem *jensen_ioportmap(unsigned long addr)
298 {
299 return (void __iomem *)addr;
300 }
301
jensen_ioremap(unsigned long addr,unsigned long size)302 __EXTERN_INLINE void __iomem *jensen_ioremap(unsigned long addr,
303 unsigned long size)
304 {
305 return (void __iomem *)(addr + 0x100000000ul);
306 }
307
jensen_is_ioaddr(unsigned long addr)308 __EXTERN_INLINE int jensen_is_ioaddr(unsigned long addr)
309 {
310 return (long)addr >= 0;
311 }
312
jensen_is_mmio(const volatile void __iomem * addr)313 __EXTERN_INLINE int jensen_is_mmio(const volatile void __iomem *addr)
314 {
315 return (unsigned long)addr >= 0x100000000ul;
316 }
317
318 /* New-style ioread interface. All the routines are so ugly for Jensen
319 that it doesn't make sense to merge them. */
320
321 #define IOPORT(OS, NS) \
322 __EXTERN_INLINE u##NS jensen_ioread##NS(const void __iomem *xaddr) \
323 { \
324 if (jensen_is_mmio(xaddr)) \
325 return jensen_read##OS(xaddr - 0x100000000ul); \
326 else \
327 return jensen_in##OS((unsigned long)xaddr); \
328 } \
329 __EXTERN_INLINE void jensen_iowrite##NS(u##NS b, void __iomem *xaddr) \
330 { \
331 if (jensen_is_mmio(xaddr)) \
332 jensen_write##OS(b, xaddr - 0x100000000ul); \
333 else \
334 jensen_out##OS(b, (unsigned long)xaddr); \
335 }
336
337 IOPORT(b, 8)
338 IOPORT(w, 16)
339 IOPORT(l, 32)
340 IOPORT(q, 64)
341
342 #undef IOPORT
343
344 #undef vuip
345 #undef vulp
346
347 #undef __IO_PREFIX
348 #define __IO_PREFIX jensen
349 #define jensen_trivial_rw_bw 0
350 #define jensen_trivial_rw_lq 0
351 #define jensen_trivial_io_bw 0
352 #define jensen_trivial_io_lq 0
353 #define jensen_trivial_iounmap 1
354 #include <asm/io_trivial.h>
355
356 #ifdef __IO_EXTERN_INLINE
357 #undef __EXTERN_INLINE
358 #undef __IO_EXTERN_INLINE
359 #endif
360
361 #endif /* __KERNEL__ */
362
363 #endif /* __ALPHA_JENSEN_H */
364