1 #ifndef __ALPHA_JENSEN_H
2 #define __ALPHA_JENSEN_H
4 #include <asm/compiler.h>
7 * Defines for the AlphaPC EISA IO and memory address space.
10 /* The Jensen is strange */
11 /* #define AUX_IRQ (9) *//* done in keyboard.h now */
14 * NOTE! The memory operations do not set any memory barriers, as it's
15 * not needed for cases like a frame buffer that is essentially memory-like.
16 * You need to do them by hand if the operations depend on ordering.
18 * Similarly, the port IO operations do a "mb" only after a write operation:
19 * if an mb is needed before (as in the case of doing memory mapped IO
20 * first, and then a port IO operation to the same device), it needs to be
23 * After the above has bitten me 100 times, I'll give up and just do the
24 * mb all the time, but right now I'm hoping this will work out. Avoiding
25 * mb's may potentially be a noticeable speed improvement, but I can't
26 * honestly say I've tested it.
28 * Handling interrupts that need to do mb's to synchronize to non-interrupts
29 * is another fun race area. Don't do it (because if you do, I'll have to
30 * do *everything* with interrupts disabled, ugh).
34 * EISA Interrupt Acknowledge address
36 #define EISA_INTA (IDENT_ADDR + 0x100000000UL)
41 #define EISA_FEPROM0 (IDENT_ADDR + 0x180000000UL)
42 #define EISA_FEPROM1 (IDENT_ADDR + 0x1A0000000UL)
45 * VL82C106 base address
47 #define EISA_VL82C106 (IDENT_ADDR + 0x1C0000000UL)
50 * EISA "Host Address Extension" address (bits 25-31 of the EISA address)
52 #define EISA_HAE (IDENT_ADDR + 0x1D0000000UL)
55 * "SYSCTL" register address
57 #define EISA_SYSCTL (IDENT_ADDR + 0x1E0000000UL)
60 * "spare" register address
62 #define EISA_SPARE (IDENT_ADDR + 0x1F0000000UL)
65 * EISA memory address offset
67 #define EISA_MEM (IDENT_ADDR + 0x200000000UL)
70 * EISA IO address offset
72 #define EISA_IO (IDENT_ADDR + 0x300000000UL)
77 #ifndef __EXTERN_INLINE
78 #define __EXTERN_INLINE extern inline
79 #define __IO_EXTERN_INLINE
83 * Handle the "host address register". This needs to be set
84 * to the high 7 bits of the EISA address. This is also needed
85 * for EISA IO addresses, which are only 16 bits wide (the
86 * hae needs to be set to 0).
88 * HAE isn't needed for the local IO operations, though.
91 #define JENSEN_HAE_ADDRESS EISA_HAE
92 #define JENSEN_HAE_MASK 0x1ffffff
94 __EXTERN_INLINE void jensen_set_hae(unsigned long addr)
96 /* hae on the Jensen is bits 31:25 shifted right */
98 if (addr != alpha_mv.hae_cache)
102 #define vuip volatile unsigned int *
107 * The "local" functions are those that don't go out to the EISA bus,
108 * but instead act on the VL82C106 chip directly.. This is mainly the
109 * keyboard, RTC, printer and first two serial lines..
111 * The local stuff makes for some complications, but it seems to be
112 * gone in the PCI version. I hope I can get DEC suckered^H^H^H^H^H^H^H^H
113 * convinced that I need one of the newer machines.
116 static inline unsigned int jensen_local_inb(unsigned long addr)
118 return 0xff & *(vuip)((addr << 9) + EISA_VL82C106);
121 static inline void jensen_local_outb(u8 b, unsigned long addr)
123 *(vuip)((addr << 9) + EISA_VL82C106) = b;
127 static inline unsigned int jensen_bus_inb(unsigned long addr)
132 result = *(volatile int *)((addr << 7) + EISA_IO + 0x00);
133 return __kernel_extbl(result, addr & 3);
136 static inline void jensen_bus_outb(u8 b, unsigned long addr)
139 *(vuip)((addr << 7) + EISA_IO + 0x00) = b * 0x01010101;
144 * It seems gcc is not very good at optimizing away logical
145 * operations that result in operations across inline functions.
146 * Which is why this is a macro.
149 #define jensen_is_local(addr) ( \
150 /* keyboard */ (addr == 0x60 || addr == 0x64) || \
151 /* RTC */ (addr == 0x170 || addr == 0x171) || \
152 /* mb COM2 */ (addr >= 0x2f8 && addr <= 0x2ff) || \
153 /* mb LPT1 */ (addr >= 0x3bc && addr <= 0x3be) || \
154 /* mb COM2 */ (addr >= 0x3f8 && addr <= 0x3ff))
156 __EXTERN_INLINE u8 jensen_inb(unsigned long addr)
158 if (jensen_is_local(addr))
159 return jensen_local_inb(addr);
161 return jensen_bus_inb(addr);
164 __EXTERN_INLINE void jensen_outb(u8 b, unsigned long addr)
166 if (jensen_is_local(addr))
167 jensen_local_outb(b, addr);
169 jensen_bus_outb(b, addr);
172 __EXTERN_INLINE u16 jensen_inw(unsigned long addr)
177 result = *(volatile int *) ((addr << 7) + EISA_IO + 0x20);
178 result >>= (addr & 3) * 8;
179 return 0xffffUL & result;
182 __EXTERN_INLINE u32 jensen_inl(unsigned long addr)
185 return *(vuip) ((addr << 7) + EISA_IO + 0x60);
188 __EXTERN_INLINE void jensen_outw(u16 b, unsigned long addr)
191 *(vuip) ((addr << 7) + EISA_IO + 0x20) = b * 0x00010001;
195 __EXTERN_INLINE void jensen_outl(u32 b, unsigned long addr)
198 *(vuip) ((addr << 7) + EISA_IO + 0x60) = b;
206 __EXTERN_INLINE u8 jensen_readb(unsigned long addr)
210 jensen_set_hae(addr);
211 addr &= JENSEN_HAE_MASK;
212 result = *(volatile int *) ((addr << 7) + EISA_MEM + 0x00);
213 result >>= (addr & 3) * 8;
214 return 0xffUL & result;
217 __EXTERN_INLINE u16 jensen_readw(unsigned long addr)
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;
228 __EXTERN_INLINE u32 jensen_readl(unsigned long addr)
230 jensen_set_hae(addr);
231 addr &= JENSEN_HAE_MASK;
232 return *(vuip) ((addr << 7) + EISA_MEM + 0x60);
235 __EXTERN_INLINE u64 jensen_readq(unsigned long addr)
237 unsigned long r0, r1;
239 jensen_set_hae(addr);
240 addr &= JENSEN_HAE_MASK;
241 addr = (addr << 7) + EISA_MEM + 0x60;
243 r1 = *(vuip) (addr + (4 << 7));
244 return r1 << 32 | r0;
247 __EXTERN_INLINE void jensen_writeb(u8 b, unsigned long addr)
249 jensen_set_hae(addr);
250 addr &= JENSEN_HAE_MASK;
251 *(vuip) ((addr << 7) + EISA_MEM + 0x00) = b * 0x01010101;
254 __EXTERN_INLINE void jensen_writew(u16 b, unsigned long addr)
256 jensen_set_hae(addr);
257 addr &= JENSEN_HAE_MASK;
258 *(vuip) ((addr << 7) + EISA_MEM + 0x20) = b * 0x00010001;
261 __EXTERN_INLINE void jensen_writel(u32 b, unsigned long addr)
263 jensen_set_hae(addr);
264 addr &= JENSEN_HAE_MASK;
265 *(vuip) ((addr << 7) + EISA_MEM + 0x60) = b;
268 __EXTERN_INLINE void jensen_writeq(u64 b, unsigned long addr)
270 jensen_set_hae(addr);
271 addr &= JENSEN_HAE_MASK;
272 addr = (addr << 7) + EISA_MEM + 0x60;
274 *(vuip) (addr + (4 << 7)) = b >> 32;
277 __EXTERN_INLINE unsigned long jensen_ioremap(unsigned long addr,
283 __EXTERN_INLINE void jensen_iounmap(unsigned long addr)
288 __EXTERN_INLINE int jensen_is_ioaddr(unsigned long addr)
290 return (long)addr >= 0;
297 #define __inb jensen_inb
298 #define __inw jensen_inw
299 #define __inl jensen_inl
300 #define __outb jensen_outb
301 #define __outw jensen_outw
302 #define __outl jensen_outl
303 #define __readb jensen_readb
304 #define __readw jensen_readw
305 #define __writeb jensen_writeb
306 #define __writew jensen_writew
307 #define __readl jensen_readl
308 #define __readq jensen_readq
309 #define __writel jensen_writel
310 #define __writeq jensen_writeq
311 #define __ioremap jensen_ioremap
312 #define __iounmap(a) jensen_iounmap((unsigned long)a)
313 #define __is_ioaddr jensen_is_ioaddr
316 * The above have so much overhead that it probably doesn't make
317 * sense to have them inlined (better icache behaviour).
320 (__builtin_constant_p((port))?__inb(port):_inb(port))
322 #define outb(x, port) \
323 (__builtin_constant_p((port))?__outb((x),(port)):_outb((x),(port)))
325 #endif /* __WANT_IO_DEF */
327 #ifdef __IO_EXTERN_INLINE
328 #undef __EXTERN_INLINE
329 #undef __IO_EXTERN_INLINE
332 #endif /* __KERNEL__ */
334 #endif /* __ALPHA_JENSEN_H */