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
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
jensen_local_inb(unsigned long addr)114 __EXTERN_INLINE unsigned int jensen_local_inb(unsigned long addr)
115 {
116 return 0xff & *(vuip)((addr << 9) + EISA_VL82C106);
117 }
118
jensen_local_outb(u8 b,unsigned long addr)119 __EXTERN_INLINE void jensen_local_outb(u8 b, unsigned long addr)
120 {
121 *(vuip)((addr << 9) + EISA_VL82C106) = b;
122 mb();
123 }
124
jensen_bus_inb(unsigned long addr)125 __EXTERN_INLINE unsigned int jensen_bus_inb(unsigned long addr)
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
jensen_bus_outb(u8 b,unsigned long addr)134 __EXTERN_INLINE void jensen_bus_outb(u8 b, unsigned long addr)
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
jensen_inb(unsigned long addr)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
jensen_outb(u8 b,unsigned long addr)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
jensen_inw(unsigned long addr)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
jensen_inl(unsigned long addr)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
jensen_outw(u16 b,unsigned long addr)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
jensen_outl(u32 b,unsigned long addr)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
jensen_readb(const volatile void __iomem * xaddr)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
jensen_readw(const volatile void __iomem * xaddr)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
jensen_readl(const volatile void __iomem * xaddr)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
jensen_readq(const volatile void __iomem * xaddr)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
jensen_writeb(u8 b,volatile void __iomem * xaddr)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
jensen_writew(u16 b,volatile void __iomem * xaddr)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
jensen_writel(u32 b,volatile void __iomem * xaddr)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
jensen_writeq(u64 b,volatile void __iomem * xaddr)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
jensen_ioportmap(unsigned long addr)283 __EXTERN_INLINE void __iomem *jensen_ioportmap(unsigned long addr)
284 {
285 return (void __iomem *)addr;
286 }
287
jensen_ioremap(unsigned long addr,unsigned long size)288 __EXTERN_INLINE void __iomem *jensen_ioremap(unsigned long addr,
289 unsigned long size)
290 {
291 return (void __iomem *)(addr + 0x100000000ul);
292 }
293
jensen_is_ioaddr(unsigned long addr)294 __EXTERN_INLINE int jensen_is_ioaddr(unsigned long addr)
295 {
296 return (long)addr >= 0;
297 }
298
jensen_is_mmio(const volatile void __iomem * addr)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) \
308 __EXTERN_INLINE unsigned int jensen_ioread##NS(const void __iomem *xaddr) \
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 */
348