• Home
  • Line#
  • Scopes#
  • Navigate#
  • Raw
  • Download
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 
jensen_set_hae(unsigned long addr)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 
jensen_local_inb(unsigned long addr)113 static inline unsigned int jensen_local_inb(unsigned long addr)
114 {
115 	return 0xff & *(vuip)((addr << 9) + EISA_VL82C106);
116 }
117 
jensen_local_outb(u8 b,unsigned long addr)118 static inline void jensen_local_outb(u8 b, unsigned long addr)
119 {
120 	*(vuip)((addr << 9) + EISA_VL82C106) = b;
121 	mb();
122 }
123 
jensen_bus_inb(unsigned long addr)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 
jensen_bus_outb(u8 b,unsigned long addr)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 
jensen_inb(unsigned long addr)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 
jensen_outb(u8 b,unsigned long addr)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 
jensen_inw(unsigned long addr)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 
jensen_inl(unsigned long addr)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 
jensen_outw(u16 b,unsigned long addr)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 
jensen_outl(u32 b,unsigned long addr)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 
jensen_readb(const volatile void __iomem * xaddr)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 
jensen_readw(const volatile void __iomem * xaddr)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 
jensen_readl(const volatile void __iomem * xaddr)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 
jensen_readq(const volatile void __iomem * xaddr)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 
jensen_writeb(u8 b,volatile void __iomem * xaddr)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 
jensen_writew(u16 b,volatile void __iomem * xaddr)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 
jensen_writel(u32 b,volatile void __iomem * xaddr)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 
jensen_writeq(u64 b,volatile void __iomem * xaddr)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 
jensen_ioportmap(unsigned long addr)282 __EXTERN_INLINE void __iomem *jensen_ioportmap(unsigned long addr)
283 {
284 	return (void __iomem *)addr;
285 }
286 
jensen_ioremap(unsigned long addr,unsigned long size)287 __EXTERN_INLINE void __iomem *jensen_ioremap(unsigned long addr,
288 					     unsigned long size)
289 {
290 	return (void __iomem *)(addr + 0x100000000ul);
291 }
292 
jensen_is_ioaddr(unsigned long addr)293 __EXTERN_INLINE int jensen_is_ioaddr(unsigned long addr)
294 {
295 	return (long)addr >= 0;
296 }
297 
jensen_is_mmio(const volatile void __iomem * addr)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 */
347