1 /* SPDX-License-Identifier: GPL-2.0 */
2 #ifndef __ALPHA_MCPCIA__H__
3 #define __ALPHA_MCPCIA__H__
4 
5 /* Define to experiment with fitting everything into one 128MB HAE window.
6    One window per bus, that is.  */
7 #define MCPCIA_ONE_HAE_WINDOW 1
8 
9 #include <linux/types.h>
10 #include <asm/compiler.h>
11 #include <asm/mce.h>
12 
13 /*
14  * MCPCIA is the internal name for a core logic chipset which provides
15  * PCI access for the RAWHIDE family of systems.
16  *
17  * This file is based on:
18  *
19  * RAWHIDE System Programmer's Manual
20  * 16-May-96
21  * Rev. 1.4
22  *
23  */
24 
25 /*------------------------------------------------------------------------**
26 **                                                                        **
27 **  I/O procedures                                                        **
28 **                                                                        **
29 **      inport[b|w|t|l], outport[b|w|t|l] 8:16:24:32 IO xfers             **
30 **	inportbxt: 8 bits only                                            **
31 **      inport:    alias of inportw                                       **
32 **      outport:   alias of outportw                                      **
33 **                                                                        **
34 **      inmem[b|w|t|l], outmem[b|w|t|l] 8:16:24:32 ISA memory xfers       **
35 **	inmembxt: 8 bits only                                             **
36 **      inmem:    alias of inmemw                                         **
37 **      outmem:   alias of outmemw                                        **
38 **                                                                        **
39 **------------------------------------------------------------------------*/
40 
41 
42 /* MCPCIA ADDRESS BIT DEFINITIONS
43  *
44  *  3333 3333 3322 2222 2222 1111 1111 11
45  *  9876 5432 1098 7654 3210 9876 5432 1098 7654 3210
46  *  ---- ---- ---- ---- ---- ---- ---- ---- ---- ----
47  *  1                                             000
48  *  ---- ---- ---- ---- ---- ---- ---- ---- ---- ----
49  *  |                                             |\|
50  *  |                               Byte Enable --+ |
51  *  |                             Transfer Length --+
52  *  +-- IO space, not cached
53  *
54  *   Byte      Transfer
55  *   Enable    Length    Transfer  Byte    Address
56  *   adr<6:5>  adr<4:3>  Length    Enable  Adder
57  *   ---------------------------------------------
58  *      00        00      Byte      1110   0x000
59  *      01        00      Byte      1101   0x020
60  *      10        00      Byte      1011   0x040
61  *      11        00      Byte      0111   0x060
62  *
63  *      00        01      Word      1100   0x008
64  *      01        01      Word      1001   0x028 <= Not supported in this code.
65  *      10        01      Word      0011   0x048
66  *
67  *      00        10      Tribyte   1000   0x010
68  *      01        10      Tribyte   0001   0x030
69  *
70  *      10        11      Longword  0000   0x058
71  *
72  *      Note that byte enables are asserted low.
73  *
74  */
75 
76 #define MCPCIA_MAX_HOSES 4
77 
78 #define MCPCIA_MID(m)		((unsigned long)(m) << 33)
79 
80 /* Dodge has PCI0 and PCI1 at MID 4 and 5 respectively.
81    Durango adds PCI2 and PCI3 at MID 6 and 7 respectively.  */
82 #define MCPCIA_HOSE2MID(h)	((h) + 4)
83 
84 #define MCPCIA_MEM_MASK 0x07ffffff /* SPARSE Mem region mask is 27 bits */
85 
86 /*
87  * Memory spaces:
88  */
89 #define MCPCIA_SPARSE(m)	(IDENT_ADDR + 0xf000000000UL + MCPCIA_MID(m))
90 #define MCPCIA_DENSE(m)		(IDENT_ADDR + 0xf100000000UL + MCPCIA_MID(m))
91 #define MCPCIA_IO(m)		(IDENT_ADDR + 0xf180000000UL + MCPCIA_MID(m))
92 #define MCPCIA_CONF(m)		(IDENT_ADDR + 0xf1c0000000UL + MCPCIA_MID(m))
93 #define MCPCIA_CSR(m)		(IDENT_ADDR + 0xf1e0000000UL + MCPCIA_MID(m))
94 #define MCPCIA_IO_IACK(m)	(IDENT_ADDR + 0xf1f0000000UL + MCPCIA_MID(m))
95 #define MCPCIA_DENSE_IO(m)	(IDENT_ADDR + 0xe1fc000000UL + MCPCIA_MID(m))
96 #define MCPCIA_DENSE_CONF(m)	(IDENT_ADDR + 0xe1fe000000UL + MCPCIA_MID(m))
97 
98 /*
99  *  General Registers
100  */
101 #define MCPCIA_REV(m)		(MCPCIA_CSR(m) + 0x000)
102 #define MCPCIA_WHOAMI(m)	(MCPCIA_CSR(m) + 0x040)
103 #define MCPCIA_PCI_LAT(m)	(MCPCIA_CSR(m) + 0x080)
104 #define MCPCIA_CAP_CTRL(m)	(MCPCIA_CSR(m) + 0x100)
105 #define MCPCIA_HAE_MEM(m)	(MCPCIA_CSR(m) + 0x400)
106 #define MCPCIA_HAE_IO(m)	(MCPCIA_CSR(m) + 0x440)
107 #define _MCPCIA_IACK_SC(m)	(MCPCIA_CSR(m) + 0x480)
108 #define MCPCIA_HAE_DENSE(m)	(MCPCIA_CSR(m) + 0x4C0)
109 
110 /*
111  * Interrupt Control registers
112  */
113 #define MCPCIA_INT_CTL(m)	(MCPCIA_CSR(m) + 0x500)
114 #define MCPCIA_INT_REQ(m)	(MCPCIA_CSR(m) + 0x540)
115 #define MCPCIA_INT_TARG(m)	(MCPCIA_CSR(m) + 0x580)
116 #define MCPCIA_INT_ADR(m)	(MCPCIA_CSR(m) + 0x5C0)
117 #define MCPCIA_INT_ADR_EXT(m)	(MCPCIA_CSR(m) + 0x600)
118 #define MCPCIA_INT_MASK0(m)	(MCPCIA_CSR(m) + 0x640)
119 #define MCPCIA_INT_MASK1(m)	(MCPCIA_CSR(m) + 0x680)
120 #define MCPCIA_INT_ACK0(m)	(MCPCIA_CSR(m) + 0x10003f00)
121 #define MCPCIA_INT_ACK1(m)	(MCPCIA_CSR(m) + 0x10003f40)
122 
123 /*
124  * Performance Monitor registers
125  */
126 #define MCPCIA_PERF_MON(m)	(MCPCIA_CSR(m) + 0x300)
127 #define MCPCIA_PERF_CONT(m)	(MCPCIA_CSR(m) + 0x340)
128 
129 /*
130  * Diagnostic Registers
131  */
132 #define MCPCIA_CAP_DIAG(m)	(MCPCIA_CSR(m) + 0x700)
133 #define MCPCIA_TOP_OF_MEM(m)	(MCPCIA_CSR(m) + 0x7C0)
134 
135 /*
136  * Error registers
137  */
138 #define MCPCIA_MC_ERR0(m)	(MCPCIA_CSR(m) + 0x800)
139 #define MCPCIA_MC_ERR1(m)	(MCPCIA_CSR(m) + 0x840)
140 #define MCPCIA_CAP_ERR(m)	(MCPCIA_CSR(m) + 0x880)
141 #define MCPCIA_PCI_ERR1(m)	(MCPCIA_CSR(m) + 0x1040)
142 #define MCPCIA_MDPA_STAT(m)	(MCPCIA_CSR(m) + 0x4000)
143 #define MCPCIA_MDPA_SYN(m)	(MCPCIA_CSR(m) + 0x4040)
144 #define MCPCIA_MDPA_DIAG(m)	(MCPCIA_CSR(m) + 0x4080)
145 #define MCPCIA_MDPB_STAT(m)	(MCPCIA_CSR(m) + 0x8000)
146 #define MCPCIA_MDPB_SYN(m)	(MCPCIA_CSR(m) + 0x8040)
147 #define MCPCIA_MDPB_DIAG(m)	(MCPCIA_CSR(m) + 0x8080)
148 
149 /*
150  * PCI Address Translation Registers.
151  */
152 #define MCPCIA_SG_TBIA(m)	(MCPCIA_CSR(m) + 0x1300)
153 #define MCPCIA_HBASE(m)		(MCPCIA_CSR(m) + 0x1340)
154 
155 #define MCPCIA_W0_BASE(m)	(MCPCIA_CSR(m) + 0x1400)
156 #define MCPCIA_W0_MASK(m)	(MCPCIA_CSR(m) + 0x1440)
157 #define MCPCIA_T0_BASE(m)	(MCPCIA_CSR(m) + 0x1480)
158 
159 #define MCPCIA_W1_BASE(m)	(MCPCIA_CSR(m) + 0x1500)
160 #define MCPCIA_W1_MASK(m)	(MCPCIA_CSR(m) + 0x1540)
161 #define MCPCIA_T1_BASE(m)	(MCPCIA_CSR(m) + 0x1580)
162 
163 #define MCPCIA_W2_BASE(m)	(MCPCIA_CSR(m) + 0x1600)
164 #define MCPCIA_W2_MASK(m)	(MCPCIA_CSR(m) + 0x1640)
165 #define MCPCIA_T2_BASE(m)	(MCPCIA_CSR(m) + 0x1680)
166 
167 #define MCPCIA_W3_BASE(m)	(MCPCIA_CSR(m) + 0x1700)
168 #define MCPCIA_W3_MASK(m)	(MCPCIA_CSR(m) + 0x1740)
169 #define MCPCIA_T3_BASE(m)	(MCPCIA_CSR(m) + 0x1780)
170 
171 /* Hack!  Only words for bus 0.  */
172 
173 #ifndef MCPCIA_ONE_HAE_WINDOW
174 #define MCPCIA_HAE_ADDRESS	MCPCIA_HAE_MEM(4)
175 #endif
176 #define MCPCIA_IACK_SC		_MCPCIA_IACK_SC(4)
177 
178 /*
179  * The canonical non-remaped I/O and MEM addresses have these values
180  * subtracted out.  This is arranged so that folks manipulating ISA
181  * devices can use their familiar numbers and have them map to bus 0.
182  */
183 
184 #define MCPCIA_IO_BIAS		MCPCIA_IO(4)
185 #define MCPCIA_MEM_BIAS		MCPCIA_DENSE(4)
186 
187 /* Offset between ram physical addresses and pci64 DAC bus addresses.  */
188 #define MCPCIA_DAC_OFFSET	(1UL << 40)
189 
190 /*
191  * Data structure for handling MCPCIA machine checks:
192  */
193 struct el_MCPCIA_uncorrected_frame_mcheck {
194 	struct el_common header;
195 	struct el_common_EV5_uncorrectable_mcheck procdata;
196 };
197 
198 
199 #ifdef __KERNEL__
200 
201 #ifndef __EXTERN_INLINE
202 #define __EXTERN_INLINE extern inline
203 #define __IO_EXTERN_INLINE
204 #endif
205 
206 /*
207  * I/O functions:
208  *
209  * MCPCIA, the RAWHIDE family PCI/memory support chipset for the EV5 (21164)
210  * and EV56 (21164a) processors, can use either a sparse address mapping
211  * scheme, or the so-called byte-word PCI address space, to get at PCI memory
212  * and I/O.
213  *
214  * Unfortunately, we can't use BWIO with EV5, so for now, we always use SPARSE.
215  */
216 
217 /*
218  * Memory functions.  64-bit and 32-bit accesses are done through
219  * dense memory space, everything else through sparse space.
220  *
221  * For reading and writing 8 and 16 bit quantities we need to
222  * go through one of the three sparse address mapping regions
223  * and use the HAE_MEM CSR to provide some bits of the address.
224  * The following few routines use only sparse address region 1
225  * which gives 1Gbyte of accessible space which relates exactly
226  * to the amount of PCI memory mapping *into* system address space.
227  * See p 6-17 of the specification but it looks something like this:
228  *
229  * 21164 Address:
230  *
231  *          3         2         1
232  * 9876543210987654321098765432109876543210
233  * 1ZZZZ0.PCI.QW.Address............BBLL
234  *
235  * ZZ = SBZ
236  * BB = Byte offset
237  * LL = Transfer length
238  *
239  * PCI Address:
240  *
241  * 3         2         1
242  * 10987654321098765432109876543210
243  * HHH....PCI.QW.Address........ 00
244  *
245  * HHH = 31:29 HAE_MEM CSR
246  *
247  */
248 
249 #define vip	volatile int __force *
250 #define vuip	volatile unsigned int __force *
251 
252 #ifndef MCPCIA_ONE_HAE_WINDOW
253 #define MCPCIA_FROB_MMIO						\
254 	if (__mcpcia_is_mmio(hose)) {					\
255 		set_hae(hose & 0xffffffff);				\
256 		hose = hose - MCPCIA_DENSE(4) + MCPCIA_SPARSE(4);	\
257 	}
258 #else
259 #define MCPCIA_FROB_MMIO						\
260 	if (__mcpcia_is_mmio(hose)) {					\
261 		hose = hose - MCPCIA_DENSE(4) + MCPCIA_SPARSE(4);	\
262 	}
263 #endif
264 
265 extern inline int __mcpcia_is_mmio(unsigned long addr)
266 {
267 	return (addr & 0x80000000UL) == 0;
268 }
269 
270 __EXTERN_INLINE unsigned int mcpcia_ioread8(const void __iomem *xaddr)
271 {
272 	unsigned long addr = (unsigned long)xaddr & MCPCIA_MEM_MASK;
273 	unsigned long hose = (unsigned long)xaddr & ~MCPCIA_MEM_MASK;
274 	unsigned long result;
275 
276 	MCPCIA_FROB_MMIO;
277 
278 	result = *(vip) ((addr << 5) + hose + 0x00);
279 	return __kernel_extbl(result, addr & 3);
280 }
281 
282 __EXTERN_INLINE void mcpcia_iowrite8(u8 b, void __iomem *xaddr)
283 {
284 	unsigned long addr = (unsigned long)xaddr & MCPCIA_MEM_MASK;
285 	unsigned long hose = (unsigned long)xaddr & ~MCPCIA_MEM_MASK;
286 	unsigned long w;
287 
288 	MCPCIA_FROB_MMIO;
289 
290 	w = __kernel_insbl(b, addr & 3);
291 	*(vuip) ((addr << 5) + hose + 0x00) = w;
292 }
293 
294 __EXTERN_INLINE unsigned int mcpcia_ioread16(const void __iomem *xaddr)
295 {
296 	unsigned long addr = (unsigned long)xaddr & MCPCIA_MEM_MASK;
297 	unsigned long hose = (unsigned long)xaddr & ~MCPCIA_MEM_MASK;
298 	unsigned long result;
299 
300 	MCPCIA_FROB_MMIO;
301 
302 	result = *(vip) ((addr << 5) + hose + 0x08);
303 	return __kernel_extwl(result, addr & 3);
304 }
305 
306 __EXTERN_INLINE void mcpcia_iowrite16(u16 b, void __iomem *xaddr)
307 {
308 	unsigned long addr = (unsigned long)xaddr & MCPCIA_MEM_MASK;
309 	unsigned long hose = (unsigned long)xaddr & ~MCPCIA_MEM_MASK;
310 	unsigned long w;
311 
312 	MCPCIA_FROB_MMIO;
313 
314 	w = __kernel_inswl(b, addr & 3);
315 	*(vuip) ((addr << 5) + hose + 0x08) = w;
316 }
317 
318 __EXTERN_INLINE unsigned int mcpcia_ioread32(const void __iomem *xaddr)
319 {
320 	unsigned long addr = (unsigned long)xaddr;
321 
322 	if (!__mcpcia_is_mmio(addr))
323 		addr = ((addr & 0xffff) << 5) + (addr & ~0xfffful) + 0x18;
324 
325 	return *(vuip)addr;
326 }
327 
328 __EXTERN_INLINE void mcpcia_iowrite32(u32 b, void __iomem *xaddr)
329 {
330 	unsigned long addr = (unsigned long)xaddr;
331 
332 	if (!__mcpcia_is_mmio(addr))
333 		addr = ((addr & 0xffff) << 5) + (addr & ~0xfffful) + 0x18;
334 
335 	*(vuip)addr = b;
336 }
337 
338 
339 __EXTERN_INLINE void __iomem *mcpcia_ioportmap(unsigned long addr)
340 {
341 	return (void __iomem *)(addr + MCPCIA_IO_BIAS);
342 }
343 
344 __EXTERN_INLINE void __iomem *mcpcia_ioremap(unsigned long addr,
345 					     unsigned long size)
346 {
347 	return (void __iomem *)(addr + MCPCIA_MEM_BIAS);
348 }
349 
350 __EXTERN_INLINE int mcpcia_is_ioaddr(unsigned long addr)
351 {
352 	return addr >= MCPCIA_SPARSE(0);
353 }
354 
355 __EXTERN_INLINE int mcpcia_is_mmio(const volatile void __iomem *xaddr)
356 {
357 	unsigned long addr = (unsigned long) xaddr;
358 	return __mcpcia_is_mmio(addr);
359 }
360 
361 #undef MCPCIA_FROB_MMIO
362 
363 #undef vip
364 #undef vuip
365 
366 #undef __IO_PREFIX
367 #define __IO_PREFIX		mcpcia
368 #define mcpcia_trivial_rw_bw	2
369 #define mcpcia_trivial_rw_lq	1
370 #define mcpcia_trivial_io_bw	0
371 #define mcpcia_trivial_io_lq	0
372 #define mcpcia_trivial_iounmap	1
373 #include <asm/io_trivial.h>
374 
375 #ifdef __IO_EXTERN_INLINE
376 #undef __EXTERN_INLINE
377 #undef __IO_EXTERN_INLINE
378 #endif
379 
380 #endif /* __KERNEL__ */
381 
382 #endif /* __ALPHA_MCPCIA__H__ */
383