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[people/ms/linux.git] / arch / alpha / kernel / core_cia.c
1 /*
2 * linux/arch/alpha/kernel/core_cia.c
3 *
4 * Written by David A Rusling (david.rusling@reo.mts.dec.com).
5 * December 1995.
6 *
7 * Copyright (C) 1995 David A Rusling
8 * Copyright (C) 1997, 1998 Jay Estabrook
9 * Copyright (C) 1998, 1999, 2000 Richard Henderson
10 *
11 * Code common to all CIA core logic chips.
12 */
13
14 #define __EXTERN_INLINE inline
15 #include <asm/io.h>
16 #include <asm/core_cia.h>
17 #undef __EXTERN_INLINE
18
19 #include <linux/types.h>
20 #include <linux/pci.h>
21 #include <linux/sched.h>
22 #include <linux/init.h>
23 #include <linux/bootmem.h>
24
25 #include <asm/ptrace.h>
26
27 #include "proto.h"
28 #include "pci_impl.h"
29
30
31 /*
32 * NOTE: Herein lie back-to-back mb instructions. They are magic.
33 * One plausible explanation is that the i/o controller does not properly
34 * handle the system transaction. Another involves timing. Ho hum.
35 */
36
37 #define DEBUG_CONFIG 0
38 #if DEBUG_CONFIG
39 # define DBGC(args) printk args
40 #else
41 # define DBGC(args)
42 #endif
43
44 #define vip volatile int *
45
46 /*
47 * Given a bus, device, and function number, compute resulting
48 * configuration space address. It is therefore not safe to have
49 * concurrent invocations to configuration space access routines, but
50 * there really shouldn't be any need for this.
51 *
52 * Type 0:
53 *
54 * 3 3|3 3 2 2|2 2 2 2|2 2 2 2|1 1 1 1|1 1 1 1|1 1
55 * 3 2|1 0 9 8|7 6 5 4|3 2 1 0|9 8 7 6|5 4 3 2|1 0 9 8|7 6 5 4|3 2 1 0
56 * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
57 * | | |D|D|D|D|D|D|D|D|D|D|D|D|D|D|D|D|D|D|D|D|D|F|F|F|R|R|R|R|R|R|0|0|
58 * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
59 *
60 * 31:11 Device select bit.
61 * 10:8 Function number
62 * 7:2 Register number
63 *
64 * Type 1:
65 *
66 * 3 3|3 3 2 2|2 2 2 2|2 2 2 2|1 1 1 1|1 1 1 1|1 1
67 * 3 2|1 0 9 8|7 6 5 4|3 2 1 0|9 8 7 6|5 4 3 2|1 0 9 8|7 6 5 4|3 2 1 0
68 * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
69 * | | | | | | | | | | |B|B|B|B|B|B|B|B|D|D|D|D|D|F|F|F|R|R|R|R|R|R|0|1|
70 * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
71 *
72 * 31:24 reserved
73 * 23:16 bus number (8 bits = 128 possible buses)
74 * 15:11 Device number (5 bits)
75 * 10:8 function number
76 * 7:2 register number
77 *
78 * Notes:
79 * The function number selects which function of a multi-function device
80 * (e.g., SCSI and Ethernet).
81 *
82 * The register selects a DWORD (32 bit) register offset. Hence it
83 * doesn't get shifted by 2 bits as we want to "drop" the bottom two
84 * bits.
85 */
86
87 static int
88 mk_conf_addr(struct pci_bus *bus_dev, unsigned int device_fn, int where,
89 unsigned long *pci_addr, unsigned char *type1)
90 {
91 u8 bus = bus_dev->number;
92
93 *type1 = (bus != 0);
94 *pci_addr = (bus << 16) | (device_fn << 8) | where;
95
96 DBGC(("mk_conf_addr(bus=%d ,device_fn=0x%x, where=0x%x,"
97 " returning address 0x%p\n"
98 bus, device_fn, where, *pci_addr));
99
100 return 0;
101 }
102
103 static unsigned int
104 conf_read(unsigned long addr, unsigned char type1)
105 {
106 unsigned long flags;
107 int stat0, value;
108 int cia_cfg = 0;
109
110 DBGC(("conf_read(addr=0x%lx, type1=%d) ", addr, type1));
111 local_irq_save(flags);
112
113 /* Reset status register to avoid losing errors. */
114 stat0 = *(vip)CIA_IOC_CIA_ERR;
115 *(vip)CIA_IOC_CIA_ERR = stat0;
116 mb();
117 *(vip)CIA_IOC_CIA_ERR; /* re-read to force write */
118
119 /* If Type1 access, must set CIA CFG. */
120 if (type1) {
121 cia_cfg = *(vip)CIA_IOC_CFG;
122 *(vip)CIA_IOC_CFG = (cia_cfg & ~3) | 1;
123 mb();
124 *(vip)CIA_IOC_CFG;
125 }
126
127 mb();
128 draina();
129 mcheck_expected(0) = 1;
130 mcheck_taken(0) = 0;
131 mb();
132
133 /* Access configuration space. */
134 value = *(vip)addr;
135 mb();
136 mb(); /* magic */
137 if (mcheck_taken(0)) {
138 mcheck_taken(0) = 0;
139 value = 0xffffffff;
140 mb();
141 }
142 mcheck_expected(0) = 0;
143 mb();
144
145 /* If Type1 access, must reset IOC CFG so normal IO space ops work. */
146 if (type1) {
147 *(vip)CIA_IOC_CFG = cia_cfg;
148 mb();
149 *(vip)CIA_IOC_CFG;
150 }
151
152 local_irq_restore(flags);
153 DBGC(("done\n"));
154
155 return value;
156 }
157
158 static void
159 conf_write(unsigned long addr, unsigned int value, unsigned char type1)
160 {
161 unsigned long flags;
162 int stat0, cia_cfg = 0;
163
164 DBGC(("conf_write(addr=0x%lx, type1=%d) ", addr, type1));
165 local_irq_save(flags);
166
167 /* Reset status register to avoid losing errors. */
168 stat0 = *(vip)CIA_IOC_CIA_ERR;
169 *(vip)CIA_IOC_CIA_ERR = stat0;
170 mb();
171 *(vip)CIA_IOC_CIA_ERR; /* re-read to force write */
172
173 /* If Type1 access, must set CIA CFG. */
174 if (type1) {
175 cia_cfg = *(vip)CIA_IOC_CFG;
176 *(vip)CIA_IOC_CFG = (cia_cfg & ~3) | 1;
177 mb();
178 *(vip)CIA_IOC_CFG;
179 }
180
181 mb();
182 draina();
183 mcheck_expected(0) = 1;
184 mcheck_taken(0) = 0;
185 mb();
186
187 /* Access configuration space. */
188 *(vip)addr = value;
189 mb();
190 *(vip)addr; /* read back to force the write */
191
192 mcheck_expected(0) = 0;
193 mb();
194
195 /* If Type1 access, must reset IOC CFG so normal IO space ops work. */
196 if (type1) {
197 *(vip)CIA_IOC_CFG = cia_cfg;
198 mb();
199 *(vip)CIA_IOC_CFG;
200 }
201
202 local_irq_restore(flags);
203 DBGC(("done\n"));
204 }
205
206 static int
207 cia_read_config(struct pci_bus *bus, unsigned int devfn, int where, int size,
208 u32 *value)
209 {
210 unsigned long addr, pci_addr;
211 long mask;
212 unsigned char type1;
213 int shift;
214
215 if (mk_conf_addr(bus, devfn, where, &pci_addr, &type1))
216 return PCIBIOS_DEVICE_NOT_FOUND;
217
218 mask = (size - 1) * 8;
219 shift = (where & 3) * 8;
220 addr = (pci_addr << 5) + mask + CIA_CONF;
221 *value = conf_read(addr, type1) >> (shift);
222 return PCIBIOS_SUCCESSFUL;
223 }
224
225 static int
226 cia_write_config(struct pci_bus *bus, unsigned int devfn, int where, int size,
227 u32 value)
228 {
229 unsigned long addr, pci_addr;
230 long mask;
231 unsigned char type1;
232
233 if (mk_conf_addr(bus, devfn, where, &pci_addr, &type1))
234 return PCIBIOS_DEVICE_NOT_FOUND;
235
236 mask = (size - 1) * 8;
237 addr = (pci_addr << 5) + mask + CIA_CONF;
238 conf_write(addr, value << ((where & 3) * 8), type1);
239 return PCIBIOS_SUCCESSFUL;
240 }
241
242 struct pci_ops cia_pci_ops =
243 {
244 .read = cia_read_config,
245 .write = cia_write_config,
246 };
247 \f
248 /*
249 * CIA Pass 1 and PYXIS Pass 1 and 2 have a broken scatter-gather tlb.
250 * It cannot be invalidated. Rather than hard code the pass numbers,
251 * actually try the tbia to see if it works.
252 */
253
254 void
255 cia_pci_tbi(struct pci_controller *hose, dma_addr_t start, dma_addr_t end)
256 {
257 wmb();
258 *(vip)CIA_IOC_PCI_TBIA = 3; /* Flush all locked and unlocked. */
259 mb();
260 *(vip)CIA_IOC_PCI_TBIA;
261 }
262
263 /*
264 * On PYXIS, even if the tbia works, we cannot use it. It effectively locks
265 * the chip (as well as direct write to the tag registers) if there is a
266 * SG DMA operation in progress. This is true at least for PYXIS rev. 1,
267 * so always use the method below.
268 */
269 /*
270 * This is the method NT and NetBSD use.
271 *
272 * Allocate mappings, and put the chip into DMA loopback mode to read a
273 * garbage page. This works by causing TLB misses, causing old entries to
274 * be purged to make room for the new entries coming in for the garbage page.
275 */
276
277 #define CIA_BROKEN_TBIA_BASE 0x30000000
278 #define CIA_BROKEN_TBIA_SIZE 1024
279
280 /* Always called with interrupts disabled */
281 void
282 cia_pci_tbi_try2(struct pci_controller *hose,
283 dma_addr_t start, dma_addr_t end)
284 {
285 void __iomem *bus_addr;
286 int ctrl;
287
288 /* Put the chip into PCI loopback mode. */
289 mb();
290 ctrl = *(vip)CIA_IOC_CIA_CTRL;
291 *(vip)CIA_IOC_CIA_CTRL = ctrl | CIA_CTRL_PCI_LOOP_EN;
292 mb();
293 *(vip)CIA_IOC_CIA_CTRL;
294 mb();
295
296 /* Read from PCI dense memory space at TBI_ADDR, skipping 32k on
297 each read. This forces SG TLB misses. NetBSD claims that the
298 TLB entries are not quite LRU, meaning that we need to read more
299 times than there are actual tags. The 2117x docs claim strict
300 round-robin. Oh well, we've come this far... */
301 /* Even better - as seen on the PYXIS rev 1 the TLB tags 0-3 can
302 be filled by the TLB misses *only once* after being invalidated
303 (by tbia or direct write). Next misses won't update them even
304 though the lock bits are cleared. Tags 4-7 are "quite LRU" though,
305 so use them and read at window 3 base exactly 4 times. Reading
306 more sometimes makes the chip crazy. -ink */
307
308 bus_addr = cia_ioremap(CIA_BROKEN_TBIA_BASE, 32768 * 4);
309
310 cia_readl(bus_addr + 0x00000);
311 cia_readl(bus_addr + 0x08000);
312 cia_readl(bus_addr + 0x10000);
313 cia_readl(bus_addr + 0x18000);
314
315 cia_iounmap(bus_addr);
316
317 /* Restore normal PCI operation. */
318 mb();
319 *(vip)CIA_IOC_CIA_CTRL = ctrl;
320 mb();
321 *(vip)CIA_IOC_CIA_CTRL;
322 mb();
323 }
324
325 static inline void
326 cia_prepare_tbia_workaround(int window)
327 {
328 unsigned long *ppte, pte;
329 long i;
330
331 /* Use minimal 1K map. */
332 ppte = __alloc_bootmem(CIA_BROKEN_TBIA_SIZE, 32768, 0);
333 pte = (virt_to_phys(ppte) >> (PAGE_SHIFT - 1)) | 1;
334
335 for (i = 0; i < CIA_BROKEN_TBIA_SIZE / sizeof(unsigned long); ++i)
336 ppte[i] = pte;
337
338 *(vip)CIA_IOC_PCI_Wn_BASE(window) = CIA_BROKEN_TBIA_BASE | 3;
339 *(vip)CIA_IOC_PCI_Wn_MASK(window)
340 = (CIA_BROKEN_TBIA_SIZE*1024 - 1) & 0xfff00000;
341 *(vip)CIA_IOC_PCI_Tn_BASE(window) = virt_to_phys(ppte) >> 2;
342 }
343
344 static void __init
345 verify_tb_operation(void)
346 {
347 static int page[PAGE_SIZE/4]
348 __attribute__((aligned(PAGE_SIZE)))
349 __initdata = { 0 };
350
351 struct pci_iommu_arena *arena = pci_isa_hose->sg_isa;
352 int ctrl, addr0, tag0, pte0, data0;
353 int temp, use_tbia_try2 = 0;
354 void __iomem *bus_addr;
355
356 /* pyxis -- tbia is broken */
357 if (pci_isa_hose->dense_io_base)
358 use_tbia_try2 = 1;
359
360 /* Put the chip into PCI loopback mode. */
361 mb();
362 ctrl = *(vip)CIA_IOC_CIA_CTRL;
363 *(vip)CIA_IOC_CIA_CTRL = ctrl | CIA_CTRL_PCI_LOOP_EN;
364 mb();
365 *(vip)CIA_IOC_CIA_CTRL;
366 mb();
367
368 /* Write a valid entry directly into the TLB registers. */
369
370 addr0 = arena->dma_base;
371 tag0 = addr0 | 1;
372 pte0 = (virt_to_phys(page) >> (PAGE_SHIFT - 1)) | 1;
373
374 *(vip)CIA_IOC_TB_TAGn(0) = tag0;
375 *(vip)CIA_IOC_TB_TAGn(1) = 0;
376 *(vip)CIA_IOC_TB_TAGn(2) = 0;
377 *(vip)CIA_IOC_TB_TAGn(3) = 0;
378 *(vip)CIA_IOC_TB_TAGn(4) = 0;
379 *(vip)CIA_IOC_TB_TAGn(5) = 0;
380 *(vip)CIA_IOC_TB_TAGn(6) = 0;
381 *(vip)CIA_IOC_TB_TAGn(7) = 0;
382 *(vip)CIA_IOC_TBn_PAGEm(0,0) = pte0;
383 *(vip)CIA_IOC_TBn_PAGEm(0,1) = 0;
384 *(vip)CIA_IOC_TBn_PAGEm(0,2) = 0;
385 *(vip)CIA_IOC_TBn_PAGEm(0,3) = 0;
386 mb();
387
388 /* Get a usable bus address */
389 bus_addr = cia_ioremap(addr0, 8*PAGE_SIZE);
390
391 /* First, verify we can read back what we've written. If
392 this fails, we can't be sure of any of the other testing
393 we're going to do, so bail. */
394 /* ??? Actually, we could do the work with machine checks.
395 By passing this register update test, we pretty much
396 guarantee that cia_pci_tbi_try1 works. If this test
397 fails, cia_pci_tbi_try2 might still work. */
398
399 temp = *(vip)CIA_IOC_TB_TAGn(0);
400 if (temp != tag0) {
401 printk("pci: failed tb register update test "
402 "(tag0 %#x != %#x)\n", temp, tag0);
403 goto failed;
404 }
405 temp = *(vip)CIA_IOC_TB_TAGn(1);
406 if (temp != 0) {
407 printk("pci: failed tb register update test "
408 "(tag1 %#x != 0)\n", temp);
409 goto failed;
410 }
411 temp = *(vip)CIA_IOC_TBn_PAGEm(0,0);
412 if (temp != pte0) {
413 printk("pci: failed tb register update test "
414 "(pte0 %#x != %#x)\n", temp, pte0);
415 goto failed;
416 }
417 printk("pci: passed tb register update test\n");
418
419 /* Second, verify we can actually do I/O through this entry. */
420
421 data0 = 0xdeadbeef;
422 page[0] = data0;
423 mcheck_expected(0) = 1;
424 mcheck_taken(0) = 0;
425 mb();
426 temp = cia_readl(bus_addr);
427 mb();
428 mcheck_expected(0) = 0;
429 mb();
430 if (mcheck_taken(0)) {
431 printk("pci: failed sg loopback i/o read test (mcheck)\n");
432 goto failed;
433 }
434 if (temp != data0) {
435 printk("pci: failed sg loopback i/o read test "
436 "(%#x != %#x)\n", temp, data0);
437 goto failed;
438 }
439 printk("pci: passed sg loopback i/o read test\n");
440
441 /* Third, try to invalidate the TLB. */
442
443 if (! use_tbia_try2) {
444 cia_pci_tbi(arena->hose, 0, -1);
445 temp = *(vip)CIA_IOC_TB_TAGn(0);
446 if (temp & 1) {
447 use_tbia_try2 = 1;
448 printk("pci: failed tbia test; workaround available\n");
449 } else {
450 printk("pci: passed tbia test\n");
451 }
452 }
453
454 /* Fourth, verify the TLB snoops the EV5's caches when
455 doing a tlb fill. */
456
457 data0 = 0x5adda15e;
458 page[0] = data0;
459 arena->ptes[4] = pte0;
460 mcheck_expected(0) = 1;
461 mcheck_taken(0) = 0;
462 mb();
463 temp = cia_readl(bus_addr + 4*PAGE_SIZE);
464 mb();
465 mcheck_expected(0) = 0;
466 mb();
467 if (mcheck_taken(0)) {
468 printk("pci: failed pte write cache snoop test (mcheck)\n");
469 goto failed;
470 }
471 if (temp != data0) {
472 printk("pci: failed pte write cache snoop test "
473 "(%#x != %#x)\n", temp, data0);
474 goto failed;
475 }
476 printk("pci: passed pte write cache snoop test\n");
477
478 /* Fifth, verify that a previously invalid PTE entry gets
479 filled from the page table. */
480
481 data0 = 0xabcdef12;
482 page[0] = data0;
483 arena->ptes[5] = pte0;
484 mcheck_expected(0) = 1;
485 mcheck_taken(0) = 0;
486 mb();
487 temp = cia_readl(bus_addr + 5*PAGE_SIZE);
488 mb();
489 mcheck_expected(0) = 0;
490 mb();
491 if (mcheck_taken(0)) {
492 printk("pci: failed valid tag invalid pte reload test "
493 "(mcheck; workaround available)\n");
494 /* Work around this bug by aligning new allocations
495 on 4 page boundaries. */
496 arena->align_entry = 4;
497 } else if (temp != data0) {
498 printk("pci: failed valid tag invalid pte reload test "
499 "(%#x != %#x)\n", temp, data0);
500 goto failed;
501 } else {
502 printk("pci: passed valid tag invalid pte reload test\n");
503 }
504
505 /* Sixth, verify machine checks are working. Test invalid
506 pte under the same valid tag as we used above. */
507
508 mcheck_expected(0) = 1;
509 mcheck_taken(0) = 0;
510 mb();
511 temp = cia_readl(bus_addr + 6*PAGE_SIZE);
512 mb();
513 mcheck_expected(0) = 0;
514 mb();
515 printk("pci: %s pci machine check test\n",
516 mcheck_taken(0) ? "passed" : "failed");
517
518 /* Clean up after the tests. */
519 arena->ptes[4] = 0;
520 arena->ptes[5] = 0;
521
522 if (use_tbia_try2) {
523 alpha_mv.mv_pci_tbi = cia_pci_tbi_try2;
524
525 /* Tags 0-3 must be disabled if we use this workaraund. */
526 wmb();
527 *(vip)CIA_IOC_TB_TAGn(0) = 2;
528 *(vip)CIA_IOC_TB_TAGn(1) = 2;
529 *(vip)CIA_IOC_TB_TAGn(2) = 2;
530 *(vip)CIA_IOC_TB_TAGn(3) = 2;
531
532 printk("pci: tbia workaround enabled\n");
533 }
534 alpha_mv.mv_pci_tbi(arena->hose, 0, -1);
535
536 exit:
537 /* unmap the bus addr */
538 cia_iounmap(bus_addr);
539
540 /* Restore normal PCI operation. */
541 mb();
542 *(vip)CIA_IOC_CIA_CTRL = ctrl;
543 mb();
544 *(vip)CIA_IOC_CIA_CTRL;
545 mb();
546 return;
547
548 failed:
549 printk("pci: disabling sg translation window\n");
550 *(vip)CIA_IOC_PCI_W0_BASE = 0;
551 *(vip)CIA_IOC_PCI_W1_BASE = 0;
552 pci_isa_hose->sg_isa = NULL;
553 alpha_mv.mv_pci_tbi = NULL;
554 goto exit;
555 }
556 \f
557 #if defined(ALPHA_RESTORE_SRM_SETUP)
558 /* Save CIA configuration data as the console had it set up. */
559 struct
560 {
561 unsigned int hae_mem;
562 unsigned int hae_io;
563 unsigned int pci_dac_offset;
564 unsigned int err_mask;
565 unsigned int cia_ctrl;
566 unsigned int cia_cnfg;
567 struct {
568 unsigned int w_base;
569 unsigned int w_mask;
570 unsigned int t_base;
571 } window[4];
572 } saved_config __attribute((common));
573
574 void
575 cia_save_srm_settings(int is_pyxis)
576 {
577 int i;
578
579 /* Save some important registers. */
580 saved_config.err_mask = *(vip)CIA_IOC_ERR_MASK;
581 saved_config.cia_ctrl = *(vip)CIA_IOC_CIA_CTRL;
582 saved_config.hae_mem = *(vip)CIA_IOC_HAE_MEM;
583 saved_config.hae_io = *(vip)CIA_IOC_HAE_IO;
584 saved_config.pci_dac_offset = *(vip)CIA_IOC_PCI_W_DAC;
585
586 if (is_pyxis)
587 saved_config.cia_cnfg = *(vip)CIA_IOC_CIA_CNFG;
588 else
589 saved_config.cia_cnfg = 0;
590
591 /* Save DMA windows configuration. */
592 for (i = 0; i < 4; i++) {
593 saved_config.window[i].w_base = *(vip)CIA_IOC_PCI_Wn_BASE(i);
594 saved_config.window[i].w_mask = *(vip)CIA_IOC_PCI_Wn_MASK(i);
595 saved_config.window[i].t_base = *(vip)CIA_IOC_PCI_Tn_BASE(i);
596 }
597 mb();
598 }
599
600 void
601 cia_restore_srm_settings(void)
602 {
603 int i;
604
605 for (i = 0; i < 4; i++) {
606 *(vip)CIA_IOC_PCI_Wn_BASE(i) = saved_config.window[i].w_base;
607 *(vip)CIA_IOC_PCI_Wn_MASK(i) = saved_config.window[i].w_mask;
608 *(vip)CIA_IOC_PCI_Tn_BASE(i) = saved_config.window[i].t_base;
609 }
610
611 *(vip)CIA_IOC_HAE_MEM = saved_config.hae_mem;
612 *(vip)CIA_IOC_HAE_IO = saved_config.hae_io;
613 *(vip)CIA_IOC_PCI_W_DAC = saved_config.pci_dac_offset;
614 *(vip)CIA_IOC_ERR_MASK = saved_config.err_mask;
615 *(vip)CIA_IOC_CIA_CTRL = saved_config.cia_ctrl;
616
617 if (saved_config.cia_cnfg) /* Must be pyxis. */
618 *(vip)CIA_IOC_CIA_CNFG = saved_config.cia_cnfg;
619
620 mb();
621 }
622 #else /* ALPHA_RESTORE_SRM_SETUP */
623 #define cia_save_srm_settings(p) do {} while (0)
624 #define cia_restore_srm_settings() do {} while (0)
625 #endif /* ALPHA_RESTORE_SRM_SETUP */
626
627 \f
628 static void __init
629 do_init_arch(int is_pyxis)
630 {
631 struct pci_controller *hose;
632 int temp, cia_rev, tbia_window;
633
634 cia_rev = *(vip)CIA_IOC_CIA_REV & CIA_REV_MASK;
635 printk("pci: cia revision %d%s\n",
636 cia_rev, is_pyxis ? " (pyxis)" : "");
637
638 if (alpha_using_srm)
639 cia_save_srm_settings(is_pyxis);
640
641 /* Set up error reporting. */
642 temp = *(vip)CIA_IOC_ERR_MASK;
643 temp &= ~(CIA_ERR_CPU_PE | CIA_ERR_MEM_NEM | CIA_ERR_PA_PTE_INV
644 | CIA_ERR_RCVD_MAS_ABT | CIA_ERR_RCVD_TAR_ABT);
645 *(vip)CIA_IOC_ERR_MASK = temp;
646
647 /* Clear all currently pending errors. */
648 temp = *(vip)CIA_IOC_CIA_ERR;
649 *(vip)CIA_IOC_CIA_ERR = temp;
650
651 /* Turn on mchecks. */
652 temp = *(vip)CIA_IOC_CIA_CTRL;
653 temp |= CIA_CTRL_FILL_ERR_EN | CIA_CTRL_MCHK_ERR_EN;
654 *(vip)CIA_IOC_CIA_CTRL = temp;
655
656 /* Clear the CFG register, which gets used for PCI config space
657 accesses. That is the way we want to use it, and we do not
658 want to depend on what ARC or SRM might have left behind. */
659 *(vip)CIA_IOC_CFG = 0;
660
661 /* Zero the HAEs. */
662 *(vip)CIA_IOC_HAE_MEM = 0;
663 *(vip)CIA_IOC_HAE_IO = 0;
664
665 /* For PYXIS, we always use BWX bus and i/o accesses. To that end,
666 make sure they're enabled on the controller. At the same time,
667 enable the monster window. */
668 if (is_pyxis) {
669 temp = *(vip)CIA_IOC_CIA_CNFG;
670 temp |= CIA_CNFG_IOA_BWEN | CIA_CNFG_PCI_MWEN;
671 *(vip)CIA_IOC_CIA_CNFG = temp;
672 }
673
674 /* Synchronize with all previous changes. */
675 mb();
676 *(vip)CIA_IOC_CIA_REV;
677
678 /*
679 * Create our single hose.
680 */
681
682 pci_isa_hose = hose = alloc_pci_controller();
683 hose->io_space = &ioport_resource;
684 hose->mem_space = &iomem_resource;
685 hose->index = 0;
686
687 if (! is_pyxis) {
688 struct resource *hae_mem = alloc_resource();
689 hose->mem_space = hae_mem;
690
691 hae_mem->start = 0;
692 hae_mem->end = CIA_MEM_R1_MASK;
693 hae_mem->name = pci_hae0_name;
694 hae_mem->flags = IORESOURCE_MEM;
695
696 if (request_resource(&iomem_resource, hae_mem) < 0)
697 printk(KERN_ERR "Failed to request HAE_MEM\n");
698
699 hose->sparse_mem_base = CIA_SPARSE_MEM - IDENT_ADDR;
700 hose->dense_mem_base = CIA_DENSE_MEM - IDENT_ADDR;
701 hose->sparse_io_base = CIA_IO - IDENT_ADDR;
702 hose->dense_io_base = 0;
703 } else {
704 hose->sparse_mem_base = 0;
705 hose->dense_mem_base = CIA_BW_MEM - IDENT_ADDR;
706 hose->sparse_io_base = 0;
707 hose->dense_io_base = CIA_BW_IO - IDENT_ADDR;
708 }
709
710 /*
711 * Set up the PCI to main memory translation windows.
712 *
713 * Window 0 is S/G 8MB at 8MB (for isa)
714 * Window 1 is S/G 1MB at 768MB (for tbia) (unused for CIA rev 1)
715 * Window 2 is direct access 2GB at 2GB
716 * Window 3 is DAC access 4GB at 8GB (or S/G for tbia if CIA rev 1)
717 *
718 * ??? NetBSD hints that page tables must be aligned to 32K,
719 * possibly due to a hardware bug. This is over-aligned
720 * from the 8K alignment one would expect for an 8MB window.
721 * No description of what revisions affected.
722 */
723
724 hose->sg_pci = NULL;
725 hose->sg_isa = iommu_arena_new(hose, 0x00800000, 0x00800000, 32768);
726
727 __direct_map_base = 0x80000000;
728 __direct_map_size = 0x80000000;
729
730 *(vip)CIA_IOC_PCI_W0_BASE = hose->sg_isa->dma_base | 3;
731 *(vip)CIA_IOC_PCI_W0_MASK = (hose->sg_isa->size - 1) & 0xfff00000;
732 *(vip)CIA_IOC_PCI_T0_BASE = virt_to_phys(hose->sg_isa->ptes) >> 2;
733
734 *(vip)CIA_IOC_PCI_W2_BASE = __direct_map_base | 1;
735 *(vip)CIA_IOC_PCI_W2_MASK = (__direct_map_size - 1) & 0xfff00000;
736 *(vip)CIA_IOC_PCI_T2_BASE = 0 >> 2;
737
738 /* On PYXIS we have the monster window, selected by bit 40, so
739 there is no need for window3 to be enabled.
740
741 On CIA, we don't have true arbitrary addressing -- bits <39:32>
742 are compared against W_DAC. We can, however, directly map 4GB,
743 which is better than before. However, due to assumptions made
744 elsewhere, we should not claim that we support DAC unless that
745 4GB covers all of physical memory.
746
747 On CIA rev 1, apparently W1 and W2 can't be used for SG.
748 At least, there are reports that it doesn't work for Alcor.
749 In that case, we have no choice but to use W3 for the TBIA
750 workaround, which means we can't use DAC at all. */
751
752 tbia_window = 1;
753 if (is_pyxis) {
754 *(vip)CIA_IOC_PCI_W3_BASE = 0;
755 } else if (cia_rev == 1) {
756 *(vip)CIA_IOC_PCI_W1_BASE = 0;
757 tbia_window = 3;
758 } else if (max_low_pfn > (0x100000000UL >> PAGE_SHIFT)) {
759 *(vip)CIA_IOC_PCI_W3_BASE = 0;
760 } else {
761 *(vip)CIA_IOC_PCI_W3_BASE = 0x00000000 | 1 | 8;
762 *(vip)CIA_IOC_PCI_W3_MASK = 0xfff00000;
763 *(vip)CIA_IOC_PCI_T3_BASE = 0 >> 2;
764
765 alpha_mv.pci_dac_offset = 0x200000000UL;
766 *(vip)CIA_IOC_PCI_W_DAC = alpha_mv.pci_dac_offset >> 32;
767 }
768
769 /* Prepare workaround for apparently broken tbia. */
770 cia_prepare_tbia_workaround(tbia_window);
771 }
772
773 void __init
774 cia_init_arch(void)
775 {
776 do_init_arch(0);
777 }
778
779 void __init
780 pyxis_init_arch(void)
781 {
782 /* On pyxis machines we can precisely calculate the
783 CPU clock frequency using pyxis real time counter.
784 It's especially useful for SX164 with broken RTC.
785
786 Both CPU and chipset are driven by the single 16.666M
787 or 16.667M crystal oscillator. PYXIS_RT_COUNT clock is
788 66.66 MHz. -ink */
789
790 unsigned int cc0, cc1;
791 unsigned long pyxis_cc;
792
793 __asm__ __volatile__ ("rpcc %0" : "=r"(cc0));
794 pyxis_cc = *(vulp)PYXIS_RT_COUNT;
795 do { } while(*(vulp)PYXIS_RT_COUNT - pyxis_cc < 4096);
796 __asm__ __volatile__ ("rpcc %0" : "=r"(cc1));
797 cc1 -= cc0;
798 hwrpb->cycle_freq = ((cc1 >> 11) * 100000000UL) / 3;
799 hwrpb_update_checksum(hwrpb);
800
801 do_init_arch(1);
802 }
803
804 void
805 cia_kill_arch(int mode)
806 {
807 if (alpha_using_srm)
808 cia_restore_srm_settings();
809 }
810
811 void __init
812 cia_init_pci(void)
813 {
814 /* Must delay this from init_arch, as we need machine checks. */
815 verify_tb_operation();
816 common_init_pci();
817 }
818
819 static inline void
820 cia_pci_clr_err(void)
821 {
822 int jd;
823
824 jd = *(vip)CIA_IOC_CIA_ERR;
825 *(vip)CIA_IOC_CIA_ERR = jd;
826 mb();
827 *(vip)CIA_IOC_CIA_ERR; /* re-read to force write. */
828 }
829
830 #ifdef CONFIG_VERBOSE_MCHECK
831 static void
832 cia_decode_pci_error(struct el_CIA_sysdata_mcheck *cia, const char *msg)
833 {
834 static const char * const pci_cmd_desc[16] = {
835 "Interrupt Acknowledge", "Special Cycle", "I/O Read",
836 "I/O Write", "Reserved 0x4", "Reserved 0x5", "Memory Read",
837 "Memory Write", "Reserved 0x8", "Reserved 0x9",
838 "Configuration Read", "Configuration Write",
839 "Memory Read Multiple", "Dual Address Cycle",
840 "Memory Read Line", "Memory Write and Invalidate"
841 };
842
843 if (cia->cia_err & (CIA_ERR_COR_ERR
844 | CIA_ERR_UN_COR_ERR
845 | CIA_ERR_MEM_NEM
846 | CIA_ERR_PA_PTE_INV)) {
847 static const char * const window_desc[6] = {
848 "No window active", "Window 0 hit", "Window 1 hit",
849 "Window 2 hit", "Window 3 hit", "Monster window hit"
850 };
851
852 const char *window;
853 const char *cmd;
854 unsigned long addr, tmp;
855 int lock, dac;
856
857 cmd = pci_cmd_desc[cia->pci_err0 & 0x7];
858 lock = (cia->pci_err0 >> 4) & 1;
859 dac = (cia->pci_err0 >> 5) & 1;
860
861 tmp = (cia->pci_err0 >> 8) & 0x1F;
862 tmp = ffs(tmp);
863 window = window_desc[tmp];
864
865 addr = cia->pci_err1;
866 if (dac) {
867 tmp = *(vip)CIA_IOC_PCI_W_DAC & 0xFFUL;
868 addr |= tmp << 32;
869 }
870
871 printk(KERN_CRIT "CIA machine check: %s\n", msg);
872 printk(KERN_CRIT " DMA command: %s\n", cmd);
873 printk(KERN_CRIT " PCI address: %#010lx\n", addr);
874 printk(KERN_CRIT " %s, Lock: %d, DAC: %d\n",
875 window, lock, dac);
876 } else if (cia->cia_err & (CIA_ERR_PERR
877 | CIA_ERR_PCI_ADDR_PE
878 | CIA_ERR_RCVD_MAS_ABT
879 | CIA_ERR_RCVD_TAR_ABT
880 | CIA_ERR_IOA_TIMEOUT)) {
881 static const char * const master_st_desc[16] = {
882 "Idle", "Drive bus", "Address step cycle",
883 "Address cycle", "Data cycle", "Last read data cycle",
884 "Last write data cycle", "Read stop cycle",
885 "Write stop cycle", "Read turnaround cycle",
886 "Write turnaround cycle", "Reserved 0xB",
887 "Reserved 0xC", "Reserved 0xD", "Reserved 0xE",
888 "Unknown state"
889 };
890 static const char * const target_st_desc[16] = {
891 "Idle", "Busy", "Read data cycle", "Write data cycle",
892 "Read stop cycle", "Write stop cycle",
893 "Read turnaround cycle", "Write turnaround cycle",
894 "Read wait cycle", "Write wait cycle",
895 "Reserved 0xA", "Reserved 0xB", "Reserved 0xC",
896 "Reserved 0xD", "Reserved 0xE", "Unknown state"
897 };
898
899 const char *cmd;
900 const char *master, *target;
901 unsigned long addr, tmp;
902 int dac;
903
904 master = master_st_desc[(cia->pci_err0 >> 16) & 0xF];
905 target = target_st_desc[(cia->pci_err0 >> 20) & 0xF];
906 cmd = pci_cmd_desc[(cia->pci_err0 >> 24) & 0xF];
907 dac = (cia->pci_err0 >> 28) & 1;
908
909 addr = cia->pci_err2;
910 if (dac) {
911 tmp = *(volatile int *)CIA_IOC_PCI_W_DAC & 0xFFUL;
912 addr |= tmp << 32;
913 }
914
915 printk(KERN_CRIT "CIA machine check: %s\n", msg);
916 printk(KERN_CRIT " PCI command: %s\n", cmd);
917 printk(KERN_CRIT " Master state: %s, Target state: %s\n",
918 master, target);
919 printk(KERN_CRIT " PCI address: %#010lx, DAC: %d\n",
920 addr, dac);
921 } else {
922 printk(KERN_CRIT "CIA machine check: %s\n", msg);
923 printk(KERN_CRIT " Unknown PCI error\n");
924 printk(KERN_CRIT " PCI_ERR0 = %#08lx", cia->pci_err0);
925 printk(KERN_CRIT " PCI_ERR1 = %#08lx", cia->pci_err1);
926 printk(KERN_CRIT " PCI_ERR2 = %#08lx", cia->pci_err2);
927 }
928 }
929
930 static void
931 cia_decode_mem_error(struct el_CIA_sysdata_mcheck *cia, const char *msg)
932 {
933 unsigned long mem_port_addr;
934 unsigned long mem_port_mask;
935 const char *mem_port_cmd;
936 const char *seq_state;
937 const char *set_select;
938 unsigned long tmp;
939
940 /* If this is a DMA command, also decode the PCI bits. */
941 if ((cia->mem_err1 >> 20) & 1)
942 cia_decode_pci_error(cia, msg);
943 else
944 printk(KERN_CRIT "CIA machine check: %s\n", msg);
945
946 mem_port_addr = cia->mem_err0 & 0xfffffff0;
947 mem_port_addr |= (cia->mem_err1 & 0x83UL) << 32;
948
949 mem_port_mask = (cia->mem_err1 >> 12) & 0xF;
950
951 tmp = (cia->mem_err1 >> 8) & 0xF;
952 tmp |= ((cia->mem_err1 >> 20) & 1) << 4;
953 if ((tmp & 0x1E) == 0x06)
954 mem_port_cmd = "WRITE BLOCK or WRITE BLOCK LOCK";
955 else if ((tmp & 0x1C) == 0x08)
956 mem_port_cmd = "READ MISS or READ MISS MODIFY";
957 else if (tmp == 0x1C)
958 mem_port_cmd = "BC VICTIM";
959 else if ((tmp & 0x1E) == 0x0E)
960 mem_port_cmd = "READ MISS MODIFY";
961 else if ((tmp & 0x1C) == 0x18)
962 mem_port_cmd = "DMA READ or DMA READ MODIFY";
963 else if ((tmp & 0x1E) == 0x12)
964 mem_port_cmd = "DMA WRITE";
965 else
966 mem_port_cmd = "Unknown";
967
968 tmp = (cia->mem_err1 >> 16) & 0xF;
969 switch (tmp) {
970 case 0x0:
971 seq_state = "Idle";
972 break;
973 case 0x1:
974 seq_state = "DMA READ or DMA WRITE";
975 break;
976 case 0x2: case 0x3:
977 seq_state = "READ MISS (or READ MISS MODIFY) with victim";
978 break;
979 case 0x4: case 0x5: case 0x6:
980 seq_state = "READ MISS (or READ MISS MODIFY) with no victim";
981 break;
982 case 0x8: case 0x9: case 0xB:
983 seq_state = "Refresh";
984 break;
985 case 0xC:
986 seq_state = "Idle, waiting for DMA pending read";
987 break;
988 case 0xE: case 0xF:
989 seq_state = "Idle, ras precharge";
990 break;
991 default:
992 seq_state = "Unknown";
993 break;
994 }
995
996 tmp = (cia->mem_err1 >> 24) & 0x1F;
997 switch (tmp) {
998 case 0x00: set_select = "Set 0 selected"; break;
999 case 0x01: set_select = "Set 1 selected"; break;
1000 case 0x02: set_select = "Set 2 selected"; break;
1001 case 0x03: set_select = "Set 3 selected"; break;
1002 case 0x04: set_select = "Set 4 selected"; break;
1003 case 0x05: set_select = "Set 5 selected"; break;
1004 case 0x06: set_select = "Set 6 selected"; break;
1005 case 0x07: set_select = "Set 7 selected"; break;
1006 case 0x08: set_select = "Set 8 selected"; break;
1007 case 0x09: set_select = "Set 9 selected"; break;
1008 case 0x0A: set_select = "Set A selected"; break;
1009 case 0x0B: set_select = "Set B selected"; break;
1010 case 0x0C: set_select = "Set C selected"; break;
1011 case 0x0D: set_select = "Set D selected"; break;
1012 case 0x0E: set_select = "Set E selected"; break;
1013 case 0x0F: set_select = "Set F selected"; break;
1014 case 0x10: set_select = "No set selected"; break;
1015 case 0x1F: set_select = "Refresh cycle"; break;
1016 default: set_select = "Unknown"; break;
1017 }
1018
1019 printk(KERN_CRIT " Memory port command: %s\n", mem_port_cmd);
1020 printk(KERN_CRIT " Memory port address: %#010lx, mask: %#lx\n",
1021 mem_port_addr, mem_port_mask);
1022 printk(KERN_CRIT " Memory sequencer state: %s\n", seq_state);
1023 printk(KERN_CRIT " Memory set: %s\n", set_select);
1024 }
1025
1026 static void
1027 cia_decode_ecc_error(struct el_CIA_sysdata_mcheck *cia, const char *msg)
1028 {
1029 long syn;
1030 long i;
1031 const char *fmt;
1032
1033 cia_decode_mem_error(cia, msg);
1034
1035 syn = cia->cia_syn & 0xff;
1036 if (syn == (syn & -syn)) {
1037 fmt = KERN_CRIT " ECC syndrome %#x -- check bit %d\n";
1038 i = ffs(syn) - 1;
1039 } else {
1040 static unsigned char const data_bit[64] = {
1041 0xCE, 0xCB, 0xD3, 0xD5,
1042 0xD6, 0xD9, 0xDA, 0xDC,
1043 0x23, 0x25, 0x26, 0x29,
1044 0x2A, 0x2C, 0x31, 0x34,
1045 0x0E, 0x0B, 0x13, 0x15,
1046 0x16, 0x19, 0x1A, 0x1C,
1047 0xE3, 0xE5, 0xE6, 0xE9,
1048 0xEA, 0xEC, 0xF1, 0xF4,
1049 0x4F, 0x4A, 0x52, 0x54,
1050 0x57, 0x58, 0x5B, 0x5D,
1051 0xA2, 0xA4, 0xA7, 0xA8,
1052 0xAB, 0xAD, 0xB0, 0xB5,
1053 0x8F, 0x8A, 0x92, 0x94,
1054 0x97, 0x98, 0x9B, 0x9D,
1055 0x62, 0x64, 0x67, 0x68,
1056 0x6B, 0x6D, 0x70, 0x75
1057 };
1058
1059 for (i = 0; i < 64; ++i)
1060 if (data_bit[i] == syn)
1061 break;
1062
1063 if (i < 64)
1064 fmt = KERN_CRIT " ECC syndrome %#x -- data bit %d\n";
1065 else
1066 fmt = KERN_CRIT " ECC syndrome %#x -- unknown bit\n";
1067 }
1068
1069 printk (fmt, syn, i);
1070 }
1071
1072 static void
1073 cia_decode_parity_error(struct el_CIA_sysdata_mcheck *cia)
1074 {
1075 static const char * const cmd_desc[16] = {
1076 "NOP", "LOCK", "FETCH", "FETCH_M", "MEMORY BARRIER",
1077 "SET DIRTY", "WRITE BLOCK", "WRITE BLOCK LOCK",
1078 "READ MISS0", "READ MISS1", "READ MISS MOD0",
1079 "READ MISS MOD1", "BCACHE VICTIM", "Spare",
1080 "READ MISS MOD STC0", "READ MISS MOD STC1"
1081 };
1082
1083 unsigned long addr;
1084 unsigned long mask;
1085 const char *cmd;
1086 int par;
1087
1088 addr = cia->cpu_err0 & 0xfffffff0;
1089 addr |= (cia->cpu_err1 & 0x83UL) << 32;
1090 cmd = cmd_desc[(cia->cpu_err1 >> 8) & 0xF];
1091 mask = (cia->cpu_err1 >> 12) & 0xF;
1092 par = (cia->cpu_err1 >> 21) & 1;
1093
1094 printk(KERN_CRIT "CIA machine check: System bus parity error\n");
1095 printk(KERN_CRIT " Command: %s, Parity bit: %d\n", cmd, par);
1096 printk(KERN_CRIT " Address: %#010lx, Mask: %#lx\n", addr, mask);
1097 }
1098 #endif /* CONFIG_VERBOSE_MCHECK */
1099
1100
1101 static int
1102 cia_decode_mchk(unsigned long la_ptr)
1103 {
1104 struct el_common *com;
1105 struct el_CIA_sysdata_mcheck *cia;
1106
1107 com = (void *)la_ptr;
1108 cia = (void *)(la_ptr + com->sys_offset);
1109
1110 if ((cia->cia_err & CIA_ERR_VALID) == 0)
1111 return 0;
1112
1113 #ifdef CONFIG_VERBOSE_MCHECK
1114 if (!alpha_verbose_mcheck)
1115 return 1;
1116
1117 switch (ffs(cia->cia_err & 0xfff) - 1) {
1118 case 0: /* CIA_ERR_COR_ERR */
1119 cia_decode_ecc_error(cia, "Corrected ECC error");
1120 break;
1121 case 1: /* CIA_ERR_UN_COR_ERR */
1122 cia_decode_ecc_error(cia, "Uncorrected ECC error");
1123 break;
1124 case 2: /* CIA_ERR_CPU_PE */
1125 cia_decode_parity_error(cia);
1126 break;
1127 case 3: /* CIA_ERR_MEM_NEM */
1128 cia_decode_mem_error(cia, "Access to nonexistent memory");
1129 break;
1130 case 4: /* CIA_ERR_PCI_SERR */
1131 cia_decode_pci_error(cia, "PCI bus system error");
1132 break;
1133 case 5: /* CIA_ERR_PERR */
1134 cia_decode_pci_error(cia, "PCI data parity error");
1135 break;
1136 case 6: /* CIA_ERR_PCI_ADDR_PE */
1137 cia_decode_pci_error(cia, "PCI address parity error");
1138 break;
1139 case 7: /* CIA_ERR_RCVD_MAS_ABT */
1140 cia_decode_pci_error(cia, "PCI master abort");
1141 break;
1142 case 8: /* CIA_ERR_RCVD_TAR_ABT */
1143 cia_decode_pci_error(cia, "PCI target abort");
1144 break;
1145 case 9: /* CIA_ERR_PA_PTE_INV */
1146 cia_decode_pci_error(cia, "PCI invalid PTE");
1147 break;
1148 case 10: /* CIA_ERR_FROM_WRT_ERR */
1149 cia_decode_mem_error(cia, "Write to flash ROM attempted");
1150 break;
1151 case 11: /* CIA_ERR_IOA_TIMEOUT */
1152 cia_decode_pci_error(cia, "I/O timeout");
1153 break;
1154 }
1155
1156 if (cia->cia_err & CIA_ERR_LOST_CORR_ERR)
1157 printk(KERN_CRIT "CIA lost machine check: "
1158 "Correctable ECC error\n");
1159 if (cia->cia_err & CIA_ERR_LOST_UN_CORR_ERR)
1160 printk(KERN_CRIT "CIA lost machine check: "
1161 "Uncorrectable ECC error\n");
1162 if (cia->cia_err & CIA_ERR_LOST_CPU_PE)
1163 printk(KERN_CRIT "CIA lost machine check: "
1164 "System bus parity error\n");
1165 if (cia->cia_err & CIA_ERR_LOST_MEM_NEM)
1166 printk(KERN_CRIT "CIA lost machine check: "
1167 "Access to nonexistent memory\n");
1168 if (cia->cia_err & CIA_ERR_LOST_PERR)
1169 printk(KERN_CRIT "CIA lost machine check: "
1170 "PCI data parity error\n");
1171 if (cia->cia_err & CIA_ERR_LOST_PCI_ADDR_PE)
1172 printk(KERN_CRIT "CIA lost machine check: "
1173 "PCI address parity error\n");
1174 if (cia->cia_err & CIA_ERR_LOST_RCVD_MAS_ABT)
1175 printk(KERN_CRIT "CIA lost machine check: "
1176 "PCI master abort\n");
1177 if (cia->cia_err & CIA_ERR_LOST_RCVD_TAR_ABT)
1178 printk(KERN_CRIT "CIA lost machine check: "
1179 "PCI target abort\n");
1180 if (cia->cia_err & CIA_ERR_LOST_PA_PTE_INV)
1181 printk(KERN_CRIT "CIA lost machine check: "
1182 "PCI invalid PTE\n");
1183 if (cia->cia_err & CIA_ERR_LOST_FROM_WRT_ERR)
1184 printk(KERN_CRIT "CIA lost machine check: "
1185 "Write to flash ROM attempted\n");
1186 if (cia->cia_err & CIA_ERR_LOST_IOA_TIMEOUT)
1187 printk(KERN_CRIT "CIA lost machine check: "
1188 "I/O timeout\n");
1189 #endif /* CONFIG_VERBOSE_MCHECK */
1190
1191 return 1;
1192 }
1193
1194 void
1195 cia_machine_check(unsigned long vector, unsigned long la_ptr,
1196 struct pt_regs * regs)
1197 {
1198 int expected;
1199
1200 /* Clear the error before any reporting. */
1201 mb();
1202 mb(); /* magic */
1203 draina();
1204 cia_pci_clr_err();
1205 wrmces(rdmces()); /* reset machine check pending flag. */
1206 mb();
1207
1208 expected = mcheck_expected(0);
1209 if (!expected && vector == 0x660)
1210 expected = cia_decode_mchk(la_ptr);
1211 process_mcheck_info(vector, la_ptr, regs, "CIA", expected);
1212 }
Michael's Linux tree.