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treewide: remove redundant IS_ERR() before error code check
[linux/fpc-iii.git] / arch / alpha / include / asm / core_mcpcia.h
blobb30dc128210d2f661df57c74d26b11735f4e14ca
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(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(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(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__ */
Linux with added FPC-III support