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