Merge git://git.kernel.org/pub/scm/linux/kernel/git/czankel/xtensa-2.6
[linux-2.6] / arch / sparc / kernel / chmc.c
1 /* chmc.c: Driver for UltraSPARC-III memory controller.
2  *
3  * Copyright (C) 2001, 2007, 2008 David S. Miller (davem@davemloft.net)
4  */
5
6 #include <linux/module.h>
7 #include <linux/kernel.h>
8 #include <linux/types.h>
9 #include <linux/slab.h>
10 #include <linux/list.h>
11 #include <linux/string.h>
12 #include <linux/sched.h>
13 #include <linux/smp.h>
14 #include <linux/errno.h>
15 #include <linux/init.h>
16 #include <linux/of.h>
17 #include <linux/of_device.h>
18 #include <asm/spitfire.h>
19 #include <asm/chmctrl.h>
20 #include <asm/cpudata.h>
21 #include <asm/oplib.h>
22 #include <asm/prom.h>
23 #include <asm/head.h>
24 #include <asm/io.h>
25 #include <asm/memctrl.h>
26
27 #define DRV_MODULE_NAME         "chmc"
28 #define PFX DRV_MODULE_NAME     ": "
29 #define DRV_MODULE_VERSION      "0.2"
30
31 MODULE_AUTHOR("David S. Miller (davem@davemloft.net)");
32 MODULE_DESCRIPTION("UltraSPARC-III memory controller driver");
33 MODULE_LICENSE("GPL");
34 MODULE_VERSION(DRV_MODULE_VERSION);
35
36 static int mc_type;
37 #define MC_TYPE_SAFARI          1
38 #define MC_TYPE_JBUS            2
39
40 static dimm_printer_t us3mc_dimm_printer;
41
42 #define CHMCTRL_NDGRPS  2
43 #define CHMCTRL_NDIMMS  4
44
45 #define CHMC_DIMMS_PER_MC       (CHMCTRL_NDGRPS * CHMCTRL_NDIMMS)
46
47 /* OBP memory-layout property format. */
48 struct chmc_obp_map {
49         unsigned char   dimm_map[144];
50         unsigned char   pin_map[576];
51 };
52
53 #define DIMM_LABEL_SZ   8
54
55 struct chmc_obp_mem_layout {
56         /* One max 8-byte string label per DIMM.  Usually
57          * this matches the label on the motherboard where
58          * that DIMM resides.
59          */
60         char                    dimm_labels[CHMC_DIMMS_PER_MC][DIMM_LABEL_SZ];
61
62         /* If symmetric use map[0], else it is
63          * asymmetric and map[1] should be used.
64          */
65         char                    symmetric;
66
67         struct chmc_obp_map     map[2];
68 };
69
70 #define CHMCTRL_NBANKS  4
71
72 struct chmc_bank_info {
73         struct chmc             *p;
74         int                     bank_id;
75
76         u64                     raw_reg;
77         int                     valid;
78         int                     uk;
79         int                     um;
80         int                     lk;
81         int                     lm;
82         int                     interleave;
83         unsigned long           base;
84         unsigned long           size;
85 };
86
87 struct chmc {
88         struct list_head                list;
89         int                             portid;
90
91         struct chmc_obp_mem_layout      layout_prop;
92         int                             layout_size;
93
94         void __iomem                    *regs;
95
96         u64                             timing_control1;
97         u64                             timing_control2;
98         u64                             timing_control3;
99         u64                             timing_control4;
100         u64                             memaddr_control;
101
102         struct chmc_bank_info           logical_banks[CHMCTRL_NBANKS];
103 };
104
105 #define JBUSMC_REGS_SIZE                8
106
107 #define JB_MC_REG1_DIMM2_BANK3          0x8000000000000000UL
108 #define JB_MC_REG1_DIMM1_BANK1          0x4000000000000000UL
109 #define JB_MC_REG1_DIMM2_BANK2          0x2000000000000000UL
110 #define JB_MC_REG1_DIMM1_BANK0          0x1000000000000000UL
111 #define JB_MC_REG1_XOR                  0x0000010000000000UL
112 #define JB_MC_REG1_ADDR_GEN_2           0x000000e000000000UL
113 #define JB_MC_REG1_ADDR_GEN_2_SHIFT     37
114 #define JB_MC_REG1_ADDR_GEN_1           0x0000001c00000000UL
115 #define JB_MC_REG1_ADDR_GEN_1_SHIFT     34
116 #define JB_MC_REG1_INTERLEAVE           0x0000000001800000UL
117 #define JB_MC_REG1_INTERLEAVE_SHIFT     23
118 #define JB_MC_REG1_DIMM2_PTYPE          0x0000000000200000UL
119 #define JB_MC_REG1_DIMM2_PTYPE_SHIFT    21
120 #define JB_MC_REG1_DIMM1_PTYPE          0x0000000000100000UL
121 #define JB_MC_REG1_DIMM1_PTYPE_SHIFT    20
122
123 #define PART_TYPE_X8            0
124 #define PART_TYPE_X4            1
125
126 #define INTERLEAVE_NONE         0
127 #define INTERLEAVE_SAME         1
128 #define INTERLEAVE_INTERNAL     2
129 #define INTERLEAVE_BOTH         3
130
131 #define ADDR_GEN_128MB          0
132 #define ADDR_GEN_256MB          1
133 #define ADDR_GEN_512MB          2
134 #define ADDR_GEN_1GB            3
135
136 #define JB_NUM_DIMM_GROUPS      2
137 #define JB_NUM_DIMMS_PER_GROUP  2
138 #define JB_NUM_DIMMS            (JB_NUM_DIMM_GROUPS * JB_NUM_DIMMS_PER_GROUP)
139
140 struct jbusmc_obp_map {
141         unsigned char   dimm_map[18];
142         unsigned char   pin_map[144];
143 };
144
145 struct jbusmc_obp_mem_layout {
146         /* One max 8-byte string label per DIMM.  Usually
147          * this matches the label on the motherboard where
148          * that DIMM resides.
149          */
150         char            dimm_labels[JB_NUM_DIMMS][DIMM_LABEL_SZ];
151
152         /* If symmetric use map[0], else it is
153          * asymmetric and map[1] should be used.
154          */
155         char                    symmetric;
156
157         struct jbusmc_obp_map   map;
158
159         char                    _pad;
160 };
161
162 struct jbusmc_dimm_group {
163         struct jbusmc                   *controller;
164         int                             index;
165         u64                             base_addr;
166         u64                             size;
167 };
168
169 struct jbusmc {
170         void __iomem                    *regs;
171         u64                             mc_reg_1;
172         u32                             portid;
173         struct jbusmc_obp_mem_layout    layout;
174         int                             layout_len;
175         int                             num_dimm_groups;
176         struct jbusmc_dimm_group        dimm_groups[JB_NUM_DIMM_GROUPS];
177         struct list_head                list;
178 };
179
180 static DEFINE_SPINLOCK(mctrl_list_lock);
181 static LIST_HEAD(mctrl_list);
182
183 static void mc_list_add(struct list_head *list)
184 {
185         spin_lock(&mctrl_list_lock);
186         list_add(list, &mctrl_list);
187         spin_unlock(&mctrl_list_lock);
188 }
189
190 static void mc_list_del(struct list_head *list)
191 {
192         spin_lock(&mctrl_list_lock);
193         list_del_init(list);
194         spin_unlock(&mctrl_list_lock);
195 }
196
197 #define SYNDROME_MIN    -1
198 #define SYNDROME_MAX    144
199
200 /* Covert syndrome code into the way the bits are positioned
201  * on the bus.
202  */
203 static int syndrome_to_qword_code(int syndrome_code)
204 {
205         if (syndrome_code < 128)
206                 syndrome_code += 16;
207         else if (syndrome_code < 128 + 9)
208                 syndrome_code -= (128 - 7);
209         else if (syndrome_code < (128 + 9 + 3))
210                 syndrome_code -= (128 + 9 - 4);
211         else
212                 syndrome_code -= (128 + 9 + 3);
213         return syndrome_code;
214 }
215
216 /* All this magic has to do with how a cache line comes over the wire
217  * on Safari and JBUS.  A 64-bit line comes over in 1 or more quadword
218  * cycles, each of which transmit ECC/MTAG info as well as the actual
219  * data.
220  */
221 #define L2_LINE_SIZE            64
222 #define L2_LINE_ADDR_MSK        (L2_LINE_SIZE - 1)
223 #define QW_PER_LINE             4
224 #define QW_BYTES                (L2_LINE_SIZE / QW_PER_LINE)
225 #define QW_BITS                 144
226 #define SAFARI_LAST_BIT         (576 - 1)
227 #define JBUS_LAST_BIT           (144 - 1)
228
229 static void get_pin_and_dimm_str(int syndrome_code, unsigned long paddr,
230                                  int *pin_p, char **dimm_str_p, void *_prop,
231                                  int base_dimm_offset)
232 {
233         int qword_code = syndrome_to_qword_code(syndrome_code);
234         int cache_line_offset;
235         int offset_inverse;
236         int dimm_map_index;
237         int map_val;
238
239         if (mc_type == MC_TYPE_JBUS) {
240                 struct jbusmc_obp_mem_layout *p = _prop;
241
242                 /* JBUS */
243                 cache_line_offset = qword_code;
244                 offset_inverse = (JBUS_LAST_BIT - cache_line_offset);
245                 dimm_map_index = offset_inverse / 8;
246                 map_val = p->map.dimm_map[dimm_map_index];
247                 map_val = ((map_val >> ((7 - (offset_inverse & 7)))) & 1);
248                 *dimm_str_p = p->dimm_labels[base_dimm_offset + map_val];
249                 *pin_p = p->map.pin_map[cache_line_offset];
250         } else {
251                 struct chmc_obp_mem_layout *p = _prop;
252                 struct chmc_obp_map *mp;
253                 int qword;
254
255                 /* Safari */
256                 if (p->symmetric)
257                         mp = &p->map[0];
258                 else
259                         mp = &p->map[1];
260
261                 qword = (paddr & L2_LINE_ADDR_MSK) / QW_BYTES;
262                 cache_line_offset = ((3 - qword) * QW_BITS) + qword_code;
263                 offset_inverse = (SAFARI_LAST_BIT - cache_line_offset);
264                 dimm_map_index = offset_inverse >> 2;
265                 map_val = mp->dimm_map[dimm_map_index];
266                 map_val = ((map_val >> ((3 - (offset_inverse & 3)) << 1)) & 0x3);
267                 *dimm_str_p = p->dimm_labels[base_dimm_offset + map_val];
268                 *pin_p = mp->pin_map[cache_line_offset];
269         }
270 }
271
272 static struct jbusmc_dimm_group *jbusmc_find_dimm_group(unsigned long phys_addr)
273 {
274         struct jbusmc *p;
275
276         list_for_each_entry(p, &mctrl_list, list) {
277                 int i;
278
279                 for (i = 0; i < p->num_dimm_groups; i++) {
280                         struct jbusmc_dimm_group *dp = &p->dimm_groups[i];
281
282                         if (phys_addr < dp->base_addr ||
283                             (dp->base_addr + dp->size) <= phys_addr)
284                                 continue;
285
286                         return dp;
287                 }
288         }
289         return NULL;
290 }
291
292 static int jbusmc_print_dimm(int syndrome_code,
293                              unsigned long phys_addr,
294                              char *buf, int buflen)
295 {
296         struct jbusmc_obp_mem_layout *prop;
297         struct jbusmc_dimm_group *dp;
298         struct jbusmc *p;
299         int first_dimm;
300
301         dp = jbusmc_find_dimm_group(phys_addr);
302         if (dp == NULL ||
303             syndrome_code < SYNDROME_MIN ||
304             syndrome_code > SYNDROME_MAX) {
305                 buf[0] = '?';
306                 buf[1] = '?';
307                 buf[2] = '?';
308                 buf[3] = '\0';
309         }
310         p = dp->controller;
311         prop = &p->layout;
312
313         first_dimm = dp->index * JB_NUM_DIMMS_PER_GROUP;
314
315         if (syndrome_code != SYNDROME_MIN) {
316                 char *dimm_str;
317                 int pin;
318
319                 get_pin_and_dimm_str(syndrome_code, phys_addr, &pin,
320                                      &dimm_str, prop, first_dimm);
321                 sprintf(buf, "%s, pin %3d", dimm_str, pin);
322         } else {
323                 int dimm;
324
325                 /* Multi-bit error, we just dump out all the
326                  * dimm labels associated with this dimm group.
327                  */
328                 for (dimm = 0; dimm < JB_NUM_DIMMS_PER_GROUP; dimm++) {
329                         sprintf(buf, "%s ",
330                                 prop->dimm_labels[first_dimm + dimm]);
331                         buf += strlen(buf);
332                 }
333         }
334
335         return 0;
336 }
337
338 static u64 __devinit jbusmc_dimm_group_size(u64 base,
339                                             const struct linux_prom64_registers *mem_regs,
340                                             int num_mem_regs)
341 {
342         u64 max = base + (8UL * 1024 * 1024 * 1024);
343         u64 max_seen = base;
344         int i;
345
346         for (i = 0; i < num_mem_regs; i++) {
347                 const struct linux_prom64_registers *ent;
348                 u64 this_base;
349                 u64 this_end;
350
351                 ent = &mem_regs[i];
352                 this_base = ent->phys_addr;
353                 this_end = this_base + ent->reg_size;
354                 if (base < this_base || base >= this_end)
355                         continue;
356                 if (this_end > max)
357                         this_end = max;
358                 if (this_end > max_seen)
359                         max_seen = this_end;
360         }
361
362         return max_seen - base;
363 }
364
365 static void __devinit jbusmc_construct_one_dimm_group(struct jbusmc *p,
366                                                       unsigned long index,
367                                                       const struct linux_prom64_registers *mem_regs,
368                                                       int num_mem_regs)
369 {
370         struct jbusmc_dimm_group *dp = &p->dimm_groups[index];
371
372         dp->controller = p;
373         dp->index = index;
374
375         dp->base_addr  = (p->portid * (64UL * 1024 * 1024 * 1024));
376         dp->base_addr += (index * (8UL * 1024 * 1024 * 1024));
377         dp->size = jbusmc_dimm_group_size(dp->base_addr, mem_regs, num_mem_regs);
378 }
379
380 static void __devinit jbusmc_construct_dimm_groups(struct jbusmc *p,
381                                                    const struct linux_prom64_registers *mem_regs,
382                                                    int num_mem_regs)
383 {
384         if (p->mc_reg_1 & JB_MC_REG1_DIMM1_BANK0) {
385                 jbusmc_construct_one_dimm_group(p, 0, mem_regs, num_mem_regs);
386                 p->num_dimm_groups++;
387         }
388         if (p->mc_reg_1 & JB_MC_REG1_DIMM2_BANK2) {
389                 jbusmc_construct_one_dimm_group(p, 1, mem_regs, num_mem_regs);
390                 p->num_dimm_groups++;
391         }
392 }
393
394 static int __devinit jbusmc_probe(struct of_device *op,
395                                   const struct of_device_id *match)
396 {
397         const struct linux_prom64_registers *mem_regs;
398         struct device_node *mem_node;
399         int err, len, num_mem_regs;
400         struct jbusmc *p;
401         const u32 *prop;
402         const void *ml;
403
404         err = -ENODEV;
405         mem_node = of_find_node_by_path("/memory");
406         if (!mem_node) {
407                 printk(KERN_ERR PFX "Cannot find /memory node.\n");
408                 goto out;
409         }
410         mem_regs = of_get_property(mem_node, "reg", &len);
411         if (!mem_regs) {
412                 printk(KERN_ERR PFX "Cannot get reg property of /memory node.\n");
413                 goto out;
414         }
415         num_mem_regs = len / sizeof(*mem_regs);
416
417         err = -ENOMEM;
418         p = kzalloc(sizeof(*p), GFP_KERNEL);
419         if (!p) {
420                 printk(KERN_ERR PFX "Cannot allocate struct jbusmc.\n");
421                 goto out;
422         }
423
424         INIT_LIST_HEAD(&p->list);
425
426         err = -ENODEV;
427         prop = of_get_property(op->node, "portid", &len);
428         if (!prop || len != 4) {
429                 printk(KERN_ERR PFX "Cannot find portid.\n");
430                 goto out_free;
431         }
432
433         p->portid = *prop;
434
435         prop = of_get_property(op->node, "memory-control-register-1", &len);
436         if (!prop || len != 8) {
437                 printk(KERN_ERR PFX "Cannot get memory control register 1.\n");
438                 goto out_free;
439         }
440
441         p->mc_reg_1 = ((u64)prop[0] << 32) | (u64) prop[1];
442
443         err = -ENOMEM;
444         p->regs = of_ioremap(&op->resource[0], 0, JBUSMC_REGS_SIZE, "jbusmc");
445         if (!p->regs) {
446                 printk(KERN_ERR PFX "Cannot map jbusmc regs.\n");
447                 goto out_free;
448         }
449
450         err = -ENODEV;
451         ml = of_get_property(op->node, "memory-layout", &p->layout_len);
452         if (!ml) {
453                 printk(KERN_ERR PFX "Cannot get memory layout property.\n");
454                 goto out_iounmap;
455         }
456         if (p->layout_len > sizeof(p->layout)) {
457                 printk(KERN_ERR PFX "Unexpected memory-layout size %d\n",
458                        p->layout_len);
459                 goto out_iounmap;
460         }
461         memcpy(&p->layout, ml, p->layout_len);
462
463         jbusmc_construct_dimm_groups(p, mem_regs, num_mem_regs);
464
465         mc_list_add(&p->list);
466
467         printk(KERN_INFO PFX "UltraSPARC-IIIi memory controller at %s\n",
468                op->node->full_name);
469
470         dev_set_drvdata(&op->dev, p);
471
472         err = 0;
473
474 out:
475         return err;
476
477 out_iounmap:
478         of_iounmap(&op->resource[0], p->regs, JBUSMC_REGS_SIZE);
479
480 out_free:
481         kfree(p);
482         goto out;
483 }
484
485 /* Does BANK decode PHYS_ADDR? */
486 static int chmc_bank_match(struct chmc_bank_info *bp, unsigned long phys_addr)
487 {
488         unsigned long upper_bits = (phys_addr & PA_UPPER_BITS) >> PA_UPPER_BITS_SHIFT;
489         unsigned long lower_bits = (phys_addr & PA_LOWER_BITS) >> PA_LOWER_BITS_SHIFT;
490
491         /* Bank must be enabled to match. */
492         if (bp->valid == 0)
493                 return 0;
494
495         /* Would BANK match upper bits? */
496         upper_bits ^= bp->um;           /* What bits are different? */
497         upper_bits  = ~upper_bits;      /* Invert. */
498         upper_bits |= bp->uk;           /* What bits don't matter for matching? */
499         upper_bits  = ~upper_bits;      /* Invert. */
500
501         if (upper_bits)
502                 return 0;
503
504         /* Would BANK match lower bits? */
505         lower_bits ^= bp->lm;           /* What bits are different? */
506         lower_bits  = ~lower_bits;      /* Invert. */
507         lower_bits |= bp->lk;           /* What bits don't matter for matching? */
508         lower_bits  = ~lower_bits;      /* Invert. */
509
510         if (lower_bits)
511                 return 0;
512
513         /* I always knew you'd be the one. */
514         return 1;
515 }
516
517 /* Given PHYS_ADDR, search memory controller banks for a match. */
518 static struct chmc_bank_info *chmc_find_bank(unsigned long phys_addr)
519 {
520         struct chmc *p;
521
522         list_for_each_entry(p, &mctrl_list, list) {
523                 int bank_no;
524
525                 for (bank_no = 0; bank_no < CHMCTRL_NBANKS; bank_no++) {
526                         struct chmc_bank_info *bp;
527
528                         bp = &p->logical_banks[bank_no];
529                         if (chmc_bank_match(bp, phys_addr))
530                                 return bp;
531                 }
532         }
533
534         return NULL;
535 }
536
537 /* This is the main purpose of this driver. */
538 static int chmc_print_dimm(int syndrome_code,
539                            unsigned long phys_addr,
540                            char *buf, int buflen)
541 {
542         struct chmc_bank_info *bp;
543         struct chmc_obp_mem_layout *prop;
544         int bank_in_controller, first_dimm;
545
546         bp = chmc_find_bank(phys_addr);
547         if (bp == NULL ||
548             syndrome_code < SYNDROME_MIN ||
549             syndrome_code > SYNDROME_MAX) {
550                 buf[0] = '?';
551                 buf[1] = '?';
552                 buf[2] = '?';
553                 buf[3] = '\0';
554                 return 0;
555         }
556
557         prop = &bp->p->layout_prop;
558         bank_in_controller = bp->bank_id & (CHMCTRL_NBANKS - 1);
559         first_dimm  = (bank_in_controller & (CHMCTRL_NDGRPS - 1));
560         first_dimm *= CHMCTRL_NDIMMS;
561
562         if (syndrome_code != SYNDROME_MIN) {
563                 char *dimm_str;
564                 int pin;
565
566                 get_pin_and_dimm_str(syndrome_code, phys_addr, &pin,
567                                      &dimm_str, prop, first_dimm);
568                 sprintf(buf, "%s, pin %3d", dimm_str, pin);
569         } else {
570                 int dimm;
571
572                 /* Multi-bit error, we just dump out all the
573                  * dimm labels associated with this bank.
574                  */
575                 for (dimm = 0; dimm < CHMCTRL_NDIMMS; dimm++) {
576                         sprintf(buf, "%s ",
577                                 prop->dimm_labels[first_dimm + dimm]);
578                         buf += strlen(buf);
579                 }
580         }
581         return 0;
582 }
583
584 /* Accessing the registers is slightly complicated.  If you want
585  * to get at the memory controller which is on the same processor
586  * the code is executing, you must use special ASI load/store else
587  * you go through the global mapping.
588  */
589 static u64 chmc_read_mcreg(struct chmc *p, unsigned long offset)
590 {
591         unsigned long ret, this_cpu;
592
593         preempt_disable();
594
595         this_cpu = real_hard_smp_processor_id();
596
597         if (p->portid == this_cpu) {
598                 __asm__ __volatile__("ldxa      [%1] %2, %0"
599                                      : "=r" (ret)
600                                      : "r" (offset), "i" (ASI_MCU_CTRL_REG));
601         } else {
602                 __asm__ __volatile__("ldxa      [%1] %2, %0"
603                                      : "=r" (ret)
604                                      : "r" (p->regs + offset),
605                                        "i" (ASI_PHYS_BYPASS_EC_E));
606         }
607
608         preempt_enable();
609
610         return ret;
611 }
612
613 #if 0 /* currently unused */
614 static void chmc_write_mcreg(struct chmc *p, unsigned long offset, u64 val)
615 {
616         if (p->portid == smp_processor_id()) {
617                 __asm__ __volatile__("stxa      %0, [%1] %2"
618                                      : : "r" (val),
619                                          "r" (offset), "i" (ASI_MCU_CTRL_REG));
620         } else {
621                 __asm__ __volatile__("ldxa      %0, [%1] %2"
622                                      : : "r" (val),
623                                          "r" (p->regs + offset),
624                                          "i" (ASI_PHYS_BYPASS_EC_E));
625         }
626 }
627 #endif
628
629 static void chmc_interpret_one_decode_reg(struct chmc *p, int which_bank, u64 val)
630 {
631         struct chmc_bank_info *bp = &p->logical_banks[which_bank];
632
633         bp->p = p;
634         bp->bank_id = (CHMCTRL_NBANKS * p->portid) + which_bank;
635         bp->raw_reg = val;
636         bp->valid = (val & MEM_DECODE_VALID) >> MEM_DECODE_VALID_SHIFT;
637         bp->uk = (val & MEM_DECODE_UK) >> MEM_DECODE_UK_SHIFT;
638         bp->um = (val & MEM_DECODE_UM) >> MEM_DECODE_UM_SHIFT;
639         bp->lk = (val & MEM_DECODE_LK) >> MEM_DECODE_LK_SHIFT;
640         bp->lm = (val & MEM_DECODE_LM) >> MEM_DECODE_LM_SHIFT;
641
642         bp->base  =  (bp->um);
643         bp->base &= ~(bp->uk);
644         bp->base <<= PA_UPPER_BITS_SHIFT;
645
646         switch(bp->lk) {
647         case 0xf:
648         default:
649                 bp->interleave = 1;
650                 break;
651
652         case 0xe:
653                 bp->interleave = 2;
654                 break;
655
656         case 0xc:
657                 bp->interleave = 4;
658                 break;
659
660         case 0x8:
661                 bp->interleave = 8;
662                 break;
663
664         case 0x0:
665                 bp->interleave = 16;
666                 break;
667         };
668
669         /* UK[10] is reserved, and UK[11] is not set for the SDRAM
670          * bank size definition.
671          */
672         bp->size = (((unsigned long)bp->uk &
673                      ((1UL << 10UL) - 1UL)) + 1UL) << PA_UPPER_BITS_SHIFT;
674         bp->size /= bp->interleave;
675 }
676
677 static void chmc_fetch_decode_regs(struct chmc *p)
678 {
679         if (p->layout_size == 0)
680                 return;
681
682         chmc_interpret_one_decode_reg(p, 0,
683                                       chmc_read_mcreg(p, CHMCTRL_DECODE1));
684         chmc_interpret_one_decode_reg(p, 1,
685                                       chmc_read_mcreg(p, CHMCTRL_DECODE2));
686         chmc_interpret_one_decode_reg(p, 2,
687                                       chmc_read_mcreg(p, CHMCTRL_DECODE3));
688         chmc_interpret_one_decode_reg(p, 3,
689                                       chmc_read_mcreg(p, CHMCTRL_DECODE4));
690 }
691
692 static int __devinit chmc_probe(struct of_device *op,
693                                 const struct of_device_id *match)
694 {
695         struct device_node *dp = op->node;
696         unsigned long ver;
697         const void *pval;
698         int len, portid;
699         struct chmc *p;
700         int err;
701
702         err = -ENODEV;
703         __asm__ ("rdpr %%ver, %0" : "=r" (ver));
704         if ((ver >> 32UL) == __JALAPENO_ID ||
705             (ver >> 32UL) == __SERRANO_ID)
706                 goto out;
707
708         portid = of_getintprop_default(dp, "portid", -1);
709         if (portid == -1)
710                 goto out;
711
712         pval = of_get_property(dp, "memory-layout", &len);
713         if (pval && len > sizeof(p->layout_prop)) {
714                 printk(KERN_ERR PFX "Unexpected memory-layout property "
715                        "size %d.\n", len);
716                 goto out;
717         }
718
719         err = -ENOMEM;
720         p = kzalloc(sizeof(*p), GFP_KERNEL);
721         if (!p) {
722                 printk(KERN_ERR PFX "Could not allocate struct chmc.\n");
723                 goto out;
724         }
725
726         p->portid = portid;
727         p->layout_size = len;
728         if (!pval)
729                 p->layout_size = 0;
730         else
731                 memcpy(&p->layout_prop, pval, len);
732
733         p->regs = of_ioremap(&op->resource[0], 0, 0x48, "chmc");
734         if (!p->regs) {
735                 printk(KERN_ERR PFX "Could not map registers.\n");
736                 goto out_free;
737         }
738
739         if (p->layout_size != 0UL) {
740                 p->timing_control1 = chmc_read_mcreg(p, CHMCTRL_TCTRL1);
741                 p->timing_control2 = chmc_read_mcreg(p, CHMCTRL_TCTRL2);
742                 p->timing_control3 = chmc_read_mcreg(p, CHMCTRL_TCTRL3);
743                 p->timing_control4 = chmc_read_mcreg(p, CHMCTRL_TCTRL4);
744                 p->memaddr_control = chmc_read_mcreg(p, CHMCTRL_MACTRL);
745         }
746
747         chmc_fetch_decode_regs(p);
748
749         mc_list_add(&p->list);
750
751         printk(KERN_INFO PFX "UltraSPARC-III memory controller at %s [%s]\n",
752                dp->full_name,
753                (p->layout_size ? "ACTIVE" : "INACTIVE"));
754
755         dev_set_drvdata(&op->dev, p);
756
757         err = 0;
758
759 out:
760         return err;
761
762 out_free:
763         kfree(p);
764         goto out;
765 }
766
767 static int __devinit us3mc_probe(struct of_device *op,
768                                 const struct of_device_id *match)
769 {
770         if (mc_type == MC_TYPE_SAFARI)
771                 return chmc_probe(op, match);
772         else if (mc_type == MC_TYPE_JBUS)
773                 return jbusmc_probe(op, match);
774         return -ENODEV;
775 }
776
777 static void __devexit chmc_destroy(struct of_device *op, struct chmc *p)
778 {
779         list_del(&p->list);
780         of_iounmap(&op->resource[0], p->regs, 0x48);
781         kfree(p);
782 }
783
784 static void __devexit jbusmc_destroy(struct of_device *op, struct jbusmc *p)
785 {
786         mc_list_del(&p->list);
787         of_iounmap(&op->resource[0], p->regs, JBUSMC_REGS_SIZE);
788         kfree(p);
789 }
790
791 static int __devexit us3mc_remove(struct of_device *op)
792 {
793         void *p = dev_get_drvdata(&op->dev);
794
795         if (p) {
796                 if (mc_type == MC_TYPE_SAFARI)
797                         chmc_destroy(op, p);
798                 else if (mc_type == MC_TYPE_JBUS)
799                         jbusmc_destroy(op, p);
800         }
801         return 0;
802 }
803
804 static const struct of_device_id us3mc_match[] = {
805         {
806                 .name = "memory-controller",
807         },
808         {},
809 };
810 MODULE_DEVICE_TABLE(of, us3mc_match);
811
812 static struct of_platform_driver us3mc_driver = {
813         .name           = "us3mc",
814         .match_table    = us3mc_match,
815         .probe          = us3mc_probe,
816         .remove         = __devexit_p(us3mc_remove),
817 };
818
819 static inline bool us3mc_platform(void)
820 {
821         if (tlb_type == cheetah || tlb_type == cheetah_plus)
822                 return true;
823         return false;
824 }
825
826 static int __init us3mc_init(void)
827 {
828         unsigned long ver;
829         int ret;
830
831         if (!us3mc_platform())
832                 return -ENODEV;
833
834         __asm__ __volatile__("rdpr %%ver, %0" : "=r" (ver));
835         if ((ver >> 32UL) == __JALAPENO_ID ||
836             (ver >> 32UL) == __SERRANO_ID) {
837                 mc_type = MC_TYPE_JBUS;
838                 us3mc_dimm_printer = jbusmc_print_dimm;
839         } else {
840                 mc_type = MC_TYPE_SAFARI;
841                 us3mc_dimm_printer = chmc_print_dimm;
842         }
843
844         ret = register_dimm_printer(us3mc_dimm_printer);
845
846         if (!ret) {
847                 ret = of_register_driver(&us3mc_driver, &of_bus_type);
848                 if (ret)
849                         unregister_dimm_printer(us3mc_dimm_printer);
850         }
851         return ret;
852 }
853
854 static void __exit us3mc_cleanup(void)
855 {
856         if (us3mc_platform()) {
857                 unregister_dimm_printer(us3mc_dimm_printer);
858                 of_unregister_driver(&us3mc_driver);
859         }
860 }
861
862 module_init(us3mc_init);
863 module_exit(us3mc_cleanup);