Commit | Line | Data |
---|---|---|
14cf11af PM |
1 | /* |
2 | * SMP support for power macintosh. | |
3 | * | |
4 | * We support both the old "powersurge" SMP architecture | |
5 | * and the current Core99 (G4 PowerMac) machines. | |
6 | * | |
7 | * Note that we don't support the very first rev. of | |
8 | * Apple/DayStar 2 CPUs board, the one with the funky | |
9 | * watchdog. Hopefully, none of these should be there except | |
10 | * maybe internally to Apple. I should probably still add some | |
11 | * code to detect this card though and disable SMP. --BenH. | |
12 | * | |
13 | * Support Macintosh G4 SMP by Troy Benjegerdes (hozer@drgw.net) | |
14 | * and Ben Herrenschmidt <benh@kernel.crashing.org>. | |
15 | * | |
16 | * Support for DayStar quad CPU cards | |
17 | * Copyright (C) XLR8, Inc. 1994-2000 | |
18 | * | |
19 | * This program is free software; you can redistribute it and/or | |
20 | * modify it under the terms of the GNU General Public License | |
21 | * as published by the Free Software Foundation; either version | |
22 | * 2 of the License, or (at your option) any later version. | |
23 | */ | |
14cf11af PM |
24 | #include <linux/kernel.h> |
25 | #include <linux/sched.h> | |
26 | #include <linux/smp.h> | |
14cf11af PM |
27 | #include <linux/interrupt.h> |
28 | #include <linux/kernel_stat.h> | |
29 | #include <linux/delay.h> | |
30 | #include <linux/init.h> | |
31 | #include <linux/spinlock.h> | |
32 | #include <linux/errno.h> | |
33 | #include <linux/hardirq.h> | |
34 | #include <linux/cpu.h> | |
54c4e6b5 | 35 | #include <linux/compiler.h> |
14cf11af PM |
36 | |
37 | #include <asm/ptrace.h> | |
38 | #include <asm/atomic.h> | |
aaddd3ea | 39 | #include <asm/code-patching.h> |
14cf11af PM |
40 | #include <asm/irq.h> |
41 | #include <asm/page.h> | |
42 | #include <asm/pgtable.h> | |
43 | #include <asm/sections.h> | |
44 | #include <asm/io.h> | |
45 | #include <asm/prom.h> | |
46 | #include <asm/smp.h> | |
14cf11af PM |
47 | #include <asm/machdep.h> |
48 | #include <asm/pmac_feature.h> | |
49 | #include <asm/time.h> | |
c0c0d996 | 50 | #include <asm/mpic.h> |
14cf11af PM |
51 | #include <asm/cacheflush.h> |
52 | #include <asm/keylargo.h> | |
35499c01 | 53 | #include <asm/pmac_low_i2c.h> |
5b9ca526 | 54 | #include <asm/pmac_pfunc.h> |
35499c01 | 55 | |
c478b581 | 56 | #undef DEBUG |
35499c01 PM |
57 | |
58 | #ifdef DEBUG | |
59 | #define DBG(fmt...) udbg_printf(fmt) | |
60 | #else | |
61 | #define DBG(fmt...) | |
62 | #endif | |
63 | ||
64 | extern void __secondary_start_pmac_0(void); | |
5b9ca526 | 65 | extern int pmac_pfunc_base_install(void); |
35499c01 | 66 | |
7ccbe504 BH |
67 | static void (*pmac_tb_freeze)(int freeze); |
68 | static u64 timebase; | |
69 | static int tb_req; | |
35499c01 | 70 | |
7ccbe504 | 71 | #ifdef CONFIG_PPC32 |
14cf11af PM |
72 | |
73 | /* | |
74 | * Powersurge (old powermac SMP) support. | |
75 | */ | |
76 | ||
14cf11af PM |
77 | /* Addresses for powersurge registers */ |
78 | #define HAMMERHEAD_BASE 0xf8000000 | |
79 | #define HHEAD_CONFIG 0x90 | |
80 | #define HHEAD_SEC_INTR 0xc0 | |
81 | ||
82 | /* register for interrupting the primary processor on the powersurge */ | |
83 | /* N.B. this is actually the ethernet ROM! */ | |
84 | #define PSURGE_PRI_INTR 0xf3019000 | |
85 | ||
86 | /* register for storing the start address for the secondary processor */ | |
87 | /* N.B. this is the PCI config space address register for the 1st bridge */ | |
88 | #define PSURGE_START 0xf2800000 | |
89 | ||
90 | /* Daystar/XLR8 4-CPU card */ | |
91 | #define PSURGE_QUAD_REG_ADDR 0xf8800000 | |
92 | ||
93 | #define PSURGE_QUAD_IRQ_SET 0 | |
94 | #define PSURGE_QUAD_IRQ_CLR 1 | |
95 | #define PSURGE_QUAD_IRQ_PRIMARY 2 | |
96 | #define PSURGE_QUAD_CKSTOP_CTL 3 | |
97 | #define PSURGE_QUAD_PRIMARY_ARB 4 | |
98 | #define PSURGE_QUAD_BOARD_ID 6 | |
99 | #define PSURGE_QUAD_WHICH_CPU 7 | |
100 | #define PSURGE_QUAD_CKSTOP_RDBK 8 | |
101 | #define PSURGE_QUAD_RESET_CTL 11 | |
102 | ||
103 | #define PSURGE_QUAD_OUT(r, v) (out_8(quad_base + ((r) << 4) + 4, (v))) | |
104 | #define PSURGE_QUAD_IN(r) (in_8(quad_base + ((r) << 4) + 4) & 0x0f) | |
105 | #define PSURGE_QUAD_BIS(r, v) (PSURGE_QUAD_OUT((r), PSURGE_QUAD_IN(r) | (v))) | |
106 | #define PSURGE_QUAD_BIC(r, v) (PSURGE_QUAD_OUT((r), PSURGE_QUAD_IN(r) & ~(v))) | |
107 | ||
108 | /* virtual addresses for the above */ | |
109 | static volatile u8 __iomem *hhead_base; | |
110 | static volatile u8 __iomem *quad_base; | |
111 | static volatile u32 __iomem *psurge_pri_intr; | |
112 | static volatile u8 __iomem *psurge_sec_intr; | |
113 | static volatile u32 __iomem *psurge_start; | |
114 | ||
115 | /* values for psurge_type */ | |
116 | #define PSURGE_NONE -1 | |
117 | #define PSURGE_DUAL 0 | |
118 | #define PSURGE_QUAD_OKEE 1 | |
119 | #define PSURGE_QUAD_COTTON 2 | |
120 | #define PSURGE_QUAD_ICEGRASS 3 | |
121 | ||
122 | /* what sort of powersurge board we have */ | |
123 | static int psurge_type = PSURGE_NONE; | |
124 | ||
14cf11af PM |
125 | /* |
126 | * Set and clear IPIs for powersurge. | |
127 | */ | |
128 | static inline void psurge_set_ipi(int cpu) | |
129 | { | |
130 | if (psurge_type == PSURGE_NONE) | |
131 | return; | |
132 | if (cpu == 0) | |
133 | in_be32(psurge_pri_intr); | |
134 | else if (psurge_type == PSURGE_DUAL) | |
135 | out_8(psurge_sec_intr, 0); | |
136 | else | |
137 | PSURGE_QUAD_OUT(PSURGE_QUAD_IRQ_SET, 1 << cpu); | |
138 | } | |
139 | ||
140 | static inline void psurge_clr_ipi(int cpu) | |
141 | { | |
142 | if (cpu > 0) { | |
143 | switch(psurge_type) { | |
144 | case PSURGE_DUAL: | |
145 | out_8(psurge_sec_intr, ~0); | |
146 | case PSURGE_NONE: | |
147 | break; | |
148 | default: | |
149 | PSURGE_QUAD_OUT(PSURGE_QUAD_IRQ_CLR, 1 << cpu); | |
150 | } | |
151 | } | |
152 | } | |
153 | ||
154 | /* | |
155 | * On powersurge (old SMP powermac architecture) we don't have | |
156 | * separate IPIs for separate messages like openpic does. Instead | |
157 | * we have a bitmap for each processor, where a 1 bit means that | |
158 | * the corresponding message is pending for that processor. | |
159 | * Ideally each cpu's entry would be in a different cache line. | |
160 | * -- paulus. | |
161 | */ | |
162 | static unsigned long psurge_smp_message[NR_CPUS]; | |
163 | ||
35a84c2f | 164 | void psurge_smp_message_recv(void) |
14cf11af PM |
165 | { |
166 | int cpu = smp_processor_id(); | |
167 | int msg; | |
168 | ||
169 | /* clear interrupt */ | |
170 | psurge_clr_ipi(cpu); | |
171 | ||
172 | if (num_online_cpus() < 2) | |
173 | return; | |
174 | ||
175 | /* make sure there is a message there */ | |
176 | for (msg = 0; msg < 4; msg++) | |
177 | if (test_and_clear_bit(msg, &psurge_smp_message[cpu])) | |
35a84c2f | 178 | smp_message_recv(msg); |
14cf11af PM |
179 | } |
180 | ||
35a84c2f | 181 | irqreturn_t psurge_primary_intr(int irq, void *d) |
14cf11af | 182 | { |
35a84c2f | 183 | psurge_smp_message_recv(); |
14cf11af PM |
184 | return IRQ_HANDLED; |
185 | } | |
186 | ||
7ed476d1 | 187 | static void smp_psurge_message_pass(int target, int msg) |
14cf11af PM |
188 | { |
189 | int i; | |
190 | ||
191 | if (num_online_cpus() < 2) | |
192 | return; | |
193 | ||
394e3902 | 194 | for_each_online_cpu(i) { |
14cf11af PM |
195 | if (target == MSG_ALL |
196 | || (target == MSG_ALL_BUT_SELF && i != smp_processor_id()) | |
197 | || target == i) { | |
198 | set_bit(msg, &psurge_smp_message[i]); | |
199 | psurge_set_ipi(i); | |
200 | } | |
201 | } | |
202 | } | |
203 | ||
204 | /* | |
205 | * Determine a quad card presence. We read the board ID register, we | |
206 | * force the data bus to change to something else, and we read it again. | |
207 | * It it's stable, then the register probably exist (ugh !) | |
208 | */ | |
209 | static int __init psurge_quad_probe(void) | |
210 | { | |
211 | int type; | |
212 | unsigned int i; | |
213 | ||
214 | type = PSURGE_QUAD_IN(PSURGE_QUAD_BOARD_ID); | |
215 | if (type < PSURGE_QUAD_OKEE || type > PSURGE_QUAD_ICEGRASS | |
216 | || type != PSURGE_QUAD_IN(PSURGE_QUAD_BOARD_ID)) | |
217 | return PSURGE_DUAL; | |
218 | ||
219 | /* looks OK, try a slightly more rigorous test */ | |
220 | /* bogus is not necessarily cacheline-aligned, | |
221 | though I don't suppose that really matters. -- paulus */ | |
222 | for (i = 0; i < 100; i++) { | |
223 | volatile u32 bogus[8]; | |
224 | bogus[(0+i)%8] = 0x00000000; | |
225 | bogus[(1+i)%8] = 0x55555555; | |
226 | bogus[(2+i)%8] = 0xFFFFFFFF; | |
227 | bogus[(3+i)%8] = 0xAAAAAAAA; | |
228 | bogus[(4+i)%8] = 0x33333333; | |
229 | bogus[(5+i)%8] = 0xCCCCCCCC; | |
230 | bogus[(6+i)%8] = 0xCCCCCCCC; | |
231 | bogus[(7+i)%8] = 0x33333333; | |
232 | wmb(); | |
233 | asm volatile("dcbf 0,%0" : : "r" (bogus) : "memory"); | |
234 | mb(); | |
235 | if (type != PSURGE_QUAD_IN(PSURGE_QUAD_BOARD_ID)) | |
236 | return PSURGE_DUAL; | |
237 | } | |
238 | return type; | |
239 | } | |
240 | ||
241 | static void __init psurge_quad_init(void) | |
242 | { | |
243 | int procbits; | |
244 | ||
245 | if (ppc_md.progress) ppc_md.progress("psurge_quad_init", 0x351); | |
246 | procbits = ~PSURGE_QUAD_IN(PSURGE_QUAD_WHICH_CPU); | |
247 | if (psurge_type == PSURGE_QUAD_ICEGRASS) | |
248 | PSURGE_QUAD_BIS(PSURGE_QUAD_RESET_CTL, procbits); | |
249 | else | |
250 | PSURGE_QUAD_BIC(PSURGE_QUAD_CKSTOP_CTL, procbits); | |
251 | mdelay(33); | |
252 | out_8(psurge_sec_intr, ~0); | |
253 | PSURGE_QUAD_OUT(PSURGE_QUAD_IRQ_CLR, procbits); | |
254 | PSURGE_QUAD_BIS(PSURGE_QUAD_RESET_CTL, procbits); | |
255 | if (psurge_type != PSURGE_QUAD_ICEGRASS) | |
256 | PSURGE_QUAD_BIS(PSURGE_QUAD_CKSTOP_CTL, procbits); | |
257 | PSURGE_QUAD_BIC(PSURGE_QUAD_PRIMARY_ARB, procbits); | |
258 | mdelay(33); | |
259 | PSURGE_QUAD_BIC(PSURGE_QUAD_RESET_CTL, procbits); | |
260 | mdelay(33); | |
261 | PSURGE_QUAD_BIS(PSURGE_QUAD_PRIMARY_ARB, procbits); | |
262 | mdelay(33); | |
263 | } | |
264 | ||
265 | static int __init smp_psurge_probe(void) | |
266 | { | |
267 | int i, ncpus; | |
30686ba6 | 268 | struct device_node *dn; |
14cf11af PM |
269 | |
270 | /* We don't do SMP on the PPC601 -- paulus */ | |
271 | if (PVR_VER(mfspr(SPRN_PVR)) == 1) | |
272 | return 1; | |
273 | ||
274 | /* | |
275 | * The powersurge cpu board can be used in the generation | |
276 | * of powermacs that have a socket for an upgradeable cpu card, | |
277 | * including the 7500, 8500, 9500, 9600. | |
278 | * The device tree doesn't tell you if you have 2 cpus because | |
279 | * OF doesn't know anything about the 2nd processor. | |
280 | * Instead we look for magic bits in magic registers, | |
281 | * in the hammerhead memory controller in the case of the | |
282 | * dual-cpu powersurge board. -- paulus. | |
283 | */ | |
30686ba6 SR |
284 | dn = of_find_node_by_name(NULL, "hammerhead"); |
285 | if (dn == NULL) | |
14cf11af | 286 | return 1; |
30686ba6 | 287 | of_node_put(dn); |
14cf11af PM |
288 | |
289 | hhead_base = ioremap(HAMMERHEAD_BASE, 0x800); | |
290 | quad_base = ioremap(PSURGE_QUAD_REG_ADDR, 1024); | |
291 | psurge_sec_intr = hhead_base + HHEAD_SEC_INTR; | |
292 | ||
293 | psurge_type = psurge_quad_probe(); | |
294 | if (psurge_type != PSURGE_DUAL) { | |
295 | psurge_quad_init(); | |
296 | /* All released cards using this HW design have 4 CPUs */ | |
297 | ncpus = 4; | |
7ccbe504 BH |
298 | /* No sure how timebase sync works on those, let's use SW */ |
299 | smp_ops->give_timebase = smp_generic_give_timebase; | |
300 | smp_ops->take_timebase = smp_generic_take_timebase; | |
14cf11af PM |
301 | } else { |
302 | iounmap(quad_base); | |
303 | if ((in_8(hhead_base + HHEAD_CONFIG) & 0x02) == 0) { | |
304 | /* not a dual-cpu card */ | |
305 | iounmap(hhead_base); | |
306 | psurge_type = PSURGE_NONE; | |
307 | return 1; | |
308 | } | |
309 | ncpus = 2; | |
310 | } | |
311 | ||
312 | psurge_start = ioremap(PSURGE_START, 4); | |
313 | psurge_pri_intr = ioremap(PSURGE_PRI_INTR, 4); | |
314 | ||
7ccbe504 | 315 | /* This is necessary because OF doesn't know about the |
094fe2e7 PM |
316 | * secondary cpu(s), and thus there aren't nodes in the |
317 | * device tree for them, and smp_setup_cpu_maps hasn't | |
7ccbe504 | 318 | * set their bits in cpu_present_map. |
094fe2e7 PM |
319 | */ |
320 | if (ncpus > NR_CPUS) | |
321 | ncpus = NR_CPUS; | |
7ccbe504 | 322 | for (i = 1; i < ncpus ; ++i) |
094fe2e7 | 323 | cpu_set(i, cpu_present_map); |
14cf11af PM |
324 | |
325 | if (ppc_md.progress) ppc_md.progress("smp_psurge_probe - done", 0x352); | |
326 | ||
327 | return ncpus; | |
328 | } | |
329 | ||
330 | static void __init smp_psurge_kick_cpu(int nr) | |
331 | { | |
332 | unsigned long start = __pa(__secondary_start_pmac_0) + nr * 8; | |
7ccbe504 BH |
333 | unsigned long a, flags; |
334 | int i, j; | |
335 | ||
336 | /* Defining this here is evil ... but I prefer hiding that | |
337 | * crap to avoid giving people ideas that they can do the | |
338 | * same. | |
339 | */ | |
340 | extern volatile unsigned int cpu_callin_map[NR_CPUS]; | |
14cf11af PM |
341 | |
342 | /* may need to flush here if secondary bats aren't setup */ | |
343 | for (a = KERNELBASE; a < KERNELBASE + 0x800000; a += 32) | |
344 | asm volatile("dcbf 0,%0" : : "r" (a) : "memory"); | |
345 | asm volatile("sync"); | |
346 | ||
347 | if (ppc_md.progress) ppc_md.progress("smp_psurge_kick_cpu", 0x353); | |
348 | ||
7ccbe504 BH |
349 | /* This is going to freeze the timeebase, we disable interrupts */ |
350 | local_irq_save(flags); | |
351 | ||
14cf11af PM |
352 | out_be32(psurge_start, start); |
353 | mb(); | |
354 | ||
355 | psurge_set_ipi(nr); | |
7ccbe504 | 356 | |
d6a29252 PM |
357 | /* |
358 | * We can't use udelay here because the timebase is now frozen. | |
359 | */ | |
360 | for (i = 0; i < 2000; ++i) | |
7ccbe504 | 361 | asm volatile("nop" : : : "memory"); |
14cf11af PM |
362 | psurge_clr_ipi(nr); |
363 | ||
7ccbe504 BH |
364 | /* |
365 | * Also, because the timebase is frozen, we must not return to the | |
366 | * caller which will try to do udelay's etc... Instead, we wait -here- | |
367 | * for the CPU to callin. | |
368 | */ | |
369 | for (i = 0; i < 100000 && !cpu_callin_map[nr]; ++i) { | |
370 | for (j = 1; j < 10000; j++) | |
371 | asm volatile("nop" : : : "memory"); | |
372 | asm volatile("sync" : : : "memory"); | |
373 | } | |
374 | if (!cpu_callin_map[nr]) | |
375 | goto stuck; | |
376 | ||
377 | /* And we do the TB sync here too for standard dual CPU cards */ | |
378 | if (psurge_type == PSURGE_DUAL) { | |
379 | while(!tb_req) | |
380 | barrier(); | |
381 | tb_req = 0; | |
382 | mb(); | |
383 | timebase = get_tb(); | |
384 | mb(); | |
385 | while (timebase) | |
386 | barrier(); | |
14cf11af | 387 | mb(); |
14cf11af | 388 | } |
7ccbe504 BH |
389 | stuck: |
390 | /* now interrupt the secondary, restarting both TBs */ | |
391 | if (psurge_type == PSURGE_DUAL) | |
392 | psurge_set_ipi(1); | |
14cf11af | 393 | |
7ccbe504 | 394 | if (ppc_md.progress) ppc_md.progress("smp_psurge_kick_cpu - done", 0x354); |
14cf11af PM |
395 | } |
396 | ||
397 | static struct irqaction psurge_irqaction = { | |
398 | .handler = psurge_primary_intr, | |
6714465e | 399 | .flags = IRQF_DISABLED, |
14cf11af PM |
400 | .name = "primary IPI", |
401 | }; | |
402 | ||
403 | static void __init smp_psurge_setup_cpu(int cpu_nr) | |
404 | { | |
7ccbe504 BH |
405 | if (cpu_nr != 0) |
406 | return; | |
14cf11af | 407 | |
7ccbe504 BH |
408 | /* reset the entry point so if we get another intr we won't |
409 | * try to startup again */ | |
410 | out_be32(psurge_start, 0x100); | |
527b3639 | 411 | if (setup_irq(irq_create_mapping(NULL, 30), &psurge_irqaction)) |
7ccbe504 | 412 | printk(KERN_ERR "Couldn't get primary IPI interrupt"); |
14cf11af PM |
413 | } |
414 | ||
415 | void __init smp_psurge_take_timebase(void) | |
416 | { | |
7ccbe504 BH |
417 | if (psurge_type != PSURGE_DUAL) |
418 | return; | |
419 | ||
420 | tb_req = 1; | |
421 | mb(); | |
422 | while (!timebase) | |
423 | barrier(); | |
424 | mb(); | |
425 | set_tb(timebase >> 32, timebase & 0xffffffff); | |
426 | timebase = 0; | |
427 | mb(); | |
428 | set_dec(tb_ticks_per_jiffy/2); | |
14cf11af PM |
429 | } |
430 | ||
431 | void __init smp_psurge_give_timebase(void) | |
432 | { | |
7ccbe504 | 433 | /* Nothing to do here */ |
14cf11af PM |
434 | } |
435 | ||
35499c01 PM |
436 | /* PowerSurge-style Macs */ |
437 | struct smp_ops_t psurge_smp_ops = { | |
438 | .message_pass = smp_psurge_message_pass, | |
439 | .probe = smp_psurge_probe, | |
440 | .kick_cpu = smp_psurge_kick_cpu, | |
441 | .setup_cpu = smp_psurge_setup_cpu, | |
442 | .give_timebase = smp_psurge_give_timebase, | |
443 | .take_timebase = smp_psurge_take_timebase, | |
444 | }; | |
445 | #endif /* CONFIG_PPC32 - actually powersurge support */ | |
14cf11af | 446 | |
1beb6a7d BH |
447 | /* |
448 | * Core 99 and later support | |
449 | */ | |
450 | ||
1beb6a7d BH |
451 | |
452 | static void smp_core99_give_timebase(void) | |
453 | { | |
454 | unsigned long flags; | |
455 | ||
456 | local_irq_save(flags); | |
457 | ||
458 | while(!tb_req) | |
459 | barrier(); | |
460 | tb_req = 0; | |
461 | (*pmac_tb_freeze)(1); | |
462 | mb(); | |
463 | timebase = get_tb(); | |
464 | mb(); | |
465 | while (timebase) | |
466 | barrier(); | |
467 | mb(); | |
468 | (*pmac_tb_freeze)(0); | |
469 | mb(); | |
470 | ||
471 | local_irq_restore(flags); | |
472 | } | |
473 | ||
474 | ||
475 | static void __devinit smp_core99_take_timebase(void) | |
476 | { | |
477 | unsigned long flags; | |
478 | ||
479 | local_irq_save(flags); | |
480 | ||
481 | tb_req = 1; | |
482 | mb(); | |
483 | while (!timebase) | |
484 | barrier(); | |
485 | mb(); | |
486 | set_tb(timebase >> 32, timebase & 0xffffffff); | |
487 | timebase = 0; | |
488 | mb(); | |
1beb6a7d BH |
489 | |
490 | local_irq_restore(flags); | |
491 | } | |
492 | ||
35499c01 PM |
493 | #ifdef CONFIG_PPC64 |
494 | /* | |
495 | * G5s enable/disable the timebase via an i2c-connected clock chip. | |
496 | */ | |
730745a5 | 497 | static struct pmac_i2c_bus *pmac_tb_clock_chip_host; |
35499c01 | 498 | static u8 pmac_tb_pulsar_addr; |
14cf11af | 499 | |
35499c01 PM |
500 | static void smp_core99_cypress_tb_freeze(int freeze) |
501 | { | |
502 | u8 data; | |
503 | int rc; | |
14cf11af | 504 | |
35499c01 PM |
505 | /* Strangely, the device-tree says address is 0xd2, but darwin |
506 | * accesses 0xd0 ... | |
507 | */ | |
730745a5 BH |
508 | pmac_i2c_setmode(pmac_tb_clock_chip_host, |
509 | pmac_i2c_mode_combined); | |
510 | rc = pmac_i2c_xfer(pmac_tb_clock_chip_host, | |
511 | 0xd0 | pmac_i2c_read, | |
512 | 1, 0x81, &data, 1); | |
35499c01 PM |
513 | if (rc != 0) |
514 | goto bail; | |
515 | ||
516 | data = (data & 0xf3) | (freeze ? 0x00 : 0x0c); | |
517 | ||
730745a5 BH |
518 | pmac_i2c_setmode(pmac_tb_clock_chip_host, pmac_i2c_mode_stdsub); |
519 | rc = pmac_i2c_xfer(pmac_tb_clock_chip_host, | |
520 | 0xd0 | pmac_i2c_write, | |
521 | 1, 0x81, &data, 1); | |
35499c01 PM |
522 | |
523 | bail: | |
524 | if (rc != 0) { | |
525 | printk("Cypress Timebase %s rc: %d\n", | |
526 | freeze ? "freeze" : "unfreeze", rc); | |
527 | panic("Timebase freeze failed !\n"); | |
14cf11af | 528 | } |
14cf11af PM |
529 | } |
530 | ||
14cf11af | 531 | |
35499c01 PM |
532 | static void smp_core99_pulsar_tb_freeze(int freeze) |
533 | { | |
534 | u8 data; | |
535 | int rc; | |
536 | ||
730745a5 BH |
537 | pmac_i2c_setmode(pmac_tb_clock_chip_host, |
538 | pmac_i2c_mode_combined); | |
539 | rc = pmac_i2c_xfer(pmac_tb_clock_chip_host, | |
540 | pmac_tb_pulsar_addr | pmac_i2c_read, | |
541 | 1, 0x2e, &data, 1); | |
35499c01 PM |
542 | if (rc != 0) |
543 | goto bail; | |
544 | ||
545 | data = (data & 0x88) | (freeze ? 0x11 : 0x22); | |
546 | ||
730745a5 BH |
547 | pmac_i2c_setmode(pmac_tb_clock_chip_host, pmac_i2c_mode_stdsub); |
548 | rc = pmac_i2c_xfer(pmac_tb_clock_chip_host, | |
549 | pmac_tb_pulsar_addr | pmac_i2c_write, | |
550 | 1, 0x2e, &data, 1); | |
35499c01 PM |
551 | bail: |
552 | if (rc != 0) { | |
553 | printk(KERN_ERR "Pulsar Timebase %s rc: %d\n", | |
554 | freeze ? "freeze" : "unfreeze", rc); | |
555 | panic("Timebase freeze failed !\n"); | |
556 | } | |
557 | } | |
14cf11af | 558 | |
1beb6a7d | 559 | static void __init smp_core99_setup_i2c_hwsync(int ncpus) |
14cf11af | 560 | { |
35499c01 PM |
561 | struct device_node *cc = NULL; |
562 | struct device_node *p; | |
1beb6a7d | 563 | const char *name = NULL; |
018a3d1d | 564 | const u32 *reg; |
35499c01 PM |
565 | int ok; |
566 | ||
35499c01 PM |
567 | /* Look for the clock chip */ |
568 | while ((cc = of_find_node_by_name(cc, "i2c-hwclock")) != NULL) { | |
569 | p = of_get_parent(cc); | |
55b61fec | 570 | ok = p && of_device_is_compatible(p, "uni-n-i2c"); |
35499c01 PM |
571 | of_node_put(p); |
572 | if (!ok) | |
573 | continue; | |
14cf11af | 574 | |
730745a5 BH |
575 | pmac_tb_clock_chip_host = pmac_i2c_find_bus(cc); |
576 | if (pmac_tb_clock_chip_host == NULL) | |
577 | continue; | |
e2eb6392 | 578 | reg = of_get_property(cc, "reg", NULL); |
35499c01 PM |
579 | if (reg == NULL) |
580 | continue; | |
35499c01 PM |
581 | switch (*reg) { |
582 | case 0xd2: | |
55b61fec | 583 | if (of_device_is_compatible(cc,"pulsar-legacy-slewing")) { |
35499c01 PM |
584 | pmac_tb_freeze = smp_core99_pulsar_tb_freeze; |
585 | pmac_tb_pulsar_addr = 0xd2; | |
1beb6a7d | 586 | name = "Pulsar"; |
55b61fec | 587 | } else if (of_device_is_compatible(cc, "cy28508")) { |
35499c01 | 588 | pmac_tb_freeze = smp_core99_cypress_tb_freeze; |
1beb6a7d | 589 | name = "Cypress"; |
35499c01 PM |
590 | } |
591 | break; | |
592 | case 0xd4: | |
593 | pmac_tb_freeze = smp_core99_pulsar_tb_freeze; | |
594 | pmac_tb_pulsar_addr = 0xd4; | |
1beb6a7d | 595 | name = "Pulsar"; |
35499c01 PM |
596 | break; |
597 | } | |
1beb6a7d | 598 | if (pmac_tb_freeze != NULL) |
35499c01 | 599 | break; |
35499c01 | 600 | } |
1beb6a7d | 601 | if (pmac_tb_freeze != NULL) { |
1beb6a7d | 602 | /* Open i2c bus for synchronous access */ |
730745a5 BH |
603 | if (pmac_i2c_open(pmac_tb_clock_chip_host, 1)) { |
604 | printk(KERN_ERR "Failed top open i2c bus for clock" | |
605 | " sync, fallback to software sync !\n"); | |
1beb6a7d BH |
606 | goto no_i2c_sync; |
607 | } | |
1beb6a7d BH |
608 | printk(KERN_INFO "Processor timebase sync using %s i2c clock\n", |
609 | name); | |
610 | return; | |
14cf11af | 611 | } |
1beb6a7d BH |
612 | no_i2c_sync: |
613 | pmac_tb_freeze = NULL; | |
730745a5 | 614 | pmac_tb_clock_chip_host = NULL; |
14cf11af PM |
615 | } |
616 | ||
14cf11af | 617 | |
14cf11af | 618 | |
35499c01 | 619 | /* |
5b9ca526 BH |
620 | * Newer G5s uses a platform function |
621 | */ | |
622 | ||
623 | static void smp_core99_pfunc_tb_freeze(int freeze) | |
624 | { | |
625 | struct device_node *cpus; | |
626 | struct pmf_args args; | |
627 | ||
628 | cpus = of_find_node_by_path("/cpus"); | |
629 | BUG_ON(cpus == NULL); | |
630 | args.count = 1; | |
631 | args.u[0].v = !freeze; | |
632 | pmf_call_function(cpus, "cpu-timebase", &args); | |
633 | of_node_put(cpus); | |
634 | } | |
635 | ||
636 | #else /* CONFIG_PPC64 */ | |
637 | ||
638 | /* | |
639 | * SMP G4 use a GPIO to enable/disable the timebase. | |
35499c01 | 640 | */ |
14cf11af | 641 | |
35499c01 | 642 | static unsigned int core99_tb_gpio; /* Timebase freeze GPIO */ |
14cf11af | 643 | |
1beb6a7d | 644 | static void smp_core99_gpio_tb_freeze(int freeze) |
14cf11af | 645 | { |
1beb6a7d BH |
646 | if (freeze) |
647 | pmac_call_feature(PMAC_FTR_WRITE_GPIO, NULL, core99_tb_gpio, 4); | |
648 | else | |
649 | pmac_call_feature(PMAC_FTR_WRITE_GPIO, NULL, core99_tb_gpio, 0); | |
14cf11af | 650 | pmac_call_feature(PMAC_FTR_READ_GPIO, NULL, core99_tb_gpio, 0); |
35499c01 PM |
651 | } |
652 | ||
5b9ca526 BH |
653 | |
654 | #endif /* !CONFIG_PPC64 */ | |
655 | ||
35499c01 PM |
656 | /* L2 and L3 cache settings to pass from CPU0 to CPU1 on G4 cpus */ |
657 | volatile static long int core99_l2_cache; | |
658 | volatile static long int core99_l3_cache; | |
659 | ||
660 | static void __devinit core99_init_caches(int cpu) | |
14cf11af | 661 | { |
1beb6a7d | 662 | #ifndef CONFIG_PPC64 |
35499c01 | 663 | if (!cpu_has_feature(CPU_FTR_L2CR)) |
14cf11af | 664 | return; |
35499c01 PM |
665 | |
666 | if (cpu == 0) { | |
667 | core99_l2_cache = _get_L2CR(); | |
668 | printk("CPU0: L2CR is %lx\n", core99_l2_cache); | |
669 | } else { | |
670 | printk("CPU%d: L2CR was %lx\n", cpu, _get_L2CR()); | |
671 | _set_L2CR(0); | |
672 | _set_L2CR(core99_l2_cache); | |
673 | printk("CPU%d: L2CR set to %lx\n", cpu, core99_l2_cache); | |
14cf11af | 674 | } |
35499c01 PM |
675 | |
676 | if (!cpu_has_feature(CPU_FTR_L3CR)) | |
677 | return; | |
678 | ||
679 | if (cpu == 0){ | |
680 | core99_l3_cache = _get_L3CR(); | |
681 | printk("CPU0: L3CR is %lx\n", core99_l3_cache); | |
682 | } else { | |
683 | printk("CPU%d: L3CR was %lx\n", cpu, _get_L3CR()); | |
684 | _set_L3CR(0); | |
685 | _set_L3CR(core99_l3_cache); | |
686 | printk("CPU%d: L3CR set to %lx\n", cpu, core99_l3_cache); | |
14cf11af | 687 | } |
1beb6a7d | 688 | #endif /* !CONFIG_PPC64 */ |
14cf11af PM |
689 | } |
690 | ||
35499c01 PM |
691 | static void __init smp_core99_setup(int ncpus) |
692 | { | |
1beb6a7d | 693 | #ifdef CONFIG_PPC64 |
35499c01 | 694 | |
1beb6a7d BH |
695 | /* i2c based HW sync on some G5s */ |
696 | if (machine_is_compatible("PowerMac7,2") || | |
697 | machine_is_compatible("PowerMac7,3") || | |
698 | machine_is_compatible("RackMac3,1")) | |
699 | smp_core99_setup_i2c_hwsync(ncpus); | |
700 | ||
5b9ca526 | 701 | /* pfunc based HW sync on recent G5s */ |
1beb6a7d | 702 | if (pmac_tb_freeze == NULL) { |
5b9ca526 BH |
703 | struct device_node *cpus = |
704 | of_find_node_by_path("/cpus"); | |
705 | if (cpus && | |
e2eb6392 | 706 | of_get_property(cpus, "platform-cpu-timebase", NULL)) { |
5b9ca526 | 707 | pmac_tb_freeze = smp_core99_pfunc_tb_freeze; |
1beb6a7d | 708 | printk(KERN_INFO "Processor timebase sync using" |
5b9ca526 | 709 | " platform function\n"); |
1beb6a7d | 710 | } |
35499c01 PM |
711 | } |
712 | ||
1beb6a7d BH |
713 | #else /* CONFIG_PPC64 */ |
714 | ||
715 | /* GPIO based HW sync on ppc32 Core99 */ | |
716 | if (pmac_tb_freeze == NULL && !machine_is_compatible("MacRISC4")) { | |
717 | struct device_node *cpu; | |
13b5aecc | 718 | const u32 *tbprop = NULL; |
1beb6a7d BH |
719 | |
720 | core99_tb_gpio = KL_GPIO_TB_ENABLE; /* default value */ | |
721 | cpu = of_find_node_by_type(NULL, "cpu"); | |
722 | if (cpu != NULL) { | |
e2eb6392 | 723 | tbprop = of_get_property(cpu, "timebase-enable", NULL); |
1beb6a7d BH |
724 | if (tbprop) |
725 | core99_tb_gpio = *tbprop; | |
726 | of_node_put(cpu); | |
727 | } | |
728 | pmac_tb_freeze = smp_core99_gpio_tb_freeze; | |
729 | printk(KERN_INFO "Processor timebase sync using" | |
730 | " GPIO 0x%02x\n", core99_tb_gpio); | |
731 | } | |
732 | ||
733 | #endif /* CONFIG_PPC64 */ | |
734 | ||
735 | /* No timebase sync, fallback to software */ | |
736 | if (pmac_tb_freeze == NULL) { | |
737 | smp_ops->give_timebase = smp_generic_give_timebase; | |
738 | smp_ops->take_timebase = smp_generic_take_timebase; | |
739 | printk(KERN_INFO "Processor timebase sync using software\n"); | |
740 | } | |
741 | ||
742 | #ifndef CONFIG_PPC64 | |
743 | { | |
744 | int i; | |
745 | ||
746 | /* XXX should get this from reg properties */ | |
747 | for (i = 1; i < ncpus; ++i) | |
6ff04c53 | 748 | set_hard_smp_processor_id(i, i); |
1beb6a7d | 749 | } |
35499c01 PM |
750 | #endif |
751 | ||
1beb6a7d BH |
752 | /* 32 bits SMP can't NAP */ |
753 | if (!machine_is_compatible("MacRISC4")) | |
754 | powersave_nap = 0; | |
755 | } | |
756 | ||
35499c01 PM |
757 | static int __init smp_core99_probe(void) |
758 | { | |
759 | struct device_node *cpus; | |
760 | int ncpus = 0; | |
761 | ||
762 | if (ppc_md.progress) ppc_md.progress("smp_core99_probe", 0x345); | |
763 | ||
764 | /* Count CPUs in the device-tree */ | |
765 | for (cpus = NULL; (cpus = of_find_node_by_type(cpus, "cpu")) != NULL;) | |
766 | ++ncpus; | |
767 | ||
768 | printk(KERN_INFO "PowerMac SMP probe found %d cpus\n", ncpus); | |
769 | ||
770 | /* Nothing more to do if less than 2 of them */ | |
771 | if (ncpus <= 1) | |
772 | return 1; | |
773 | ||
730745a5 BH |
774 | /* We need to perform some early initialisations before we can start |
775 | * setting up SMP as we are running before initcalls | |
776 | */ | |
5b9ca526 | 777 | pmac_pfunc_base_install(); |
730745a5 BH |
778 | pmac_i2c_init(); |
779 | ||
780 | /* Setup various bits like timebase sync method, ability to nap, ... */ | |
35499c01 | 781 | smp_core99_setup(ncpus); |
730745a5 BH |
782 | |
783 | /* Install IPIs */ | |
35499c01 | 784 | mpic_request_ipis(); |
730745a5 BH |
785 | |
786 | /* Collect l2cr and l3cr values from CPU 0 */ | |
35499c01 PM |
787 | core99_init_caches(0); |
788 | ||
789 | return ncpus; | |
790 | } | |
791 | ||
792 | static void __devinit smp_core99_kick_cpu(int nr) | |
793 | { | |
794 | unsigned int save_vector; | |
758438a7 | 795 | unsigned long target, flags; |
549e8152 | 796 | unsigned int *vector = (unsigned int *)(PAGE_OFFSET+0x100); |
35499c01 PM |
797 | |
798 | if (nr < 0 || nr > 3) | |
799 | return; | |
758438a7 ME |
800 | |
801 | if (ppc_md.progress) | |
802 | ppc_md.progress("smp_core99_kick_cpu", 0x346); | |
35499c01 PM |
803 | |
804 | local_irq_save(flags); | |
35499c01 PM |
805 | |
806 | /* Save reset vector */ | |
807 | save_vector = *vector; | |
808 | ||
758438a7 | 809 | /* Setup fake reset vector that does |
549e8152 | 810 | * b __secondary_start_pmac_0 + nr*8 |
35499c01 | 811 | */ |
758438a7 | 812 | target = (unsigned long) __secondary_start_pmac_0 + nr * 8; |
e7a57273 | 813 | patch_branch(vector, target, BRANCH_SET_LINK); |
35499c01 PM |
814 | |
815 | /* Put some life in our friend */ | |
816 | pmac_call_feature(PMAC_FTR_RESET_CPU, NULL, nr, 0); | |
817 | ||
818 | /* FIXME: We wait a bit for the CPU to take the exception, I should | |
819 | * instead wait for the entry code to set something for me. Well, | |
820 | * ideally, all that crap will be done in prom.c and the CPU left | |
821 | * in a RAM-based wait loop like CHRP. | |
822 | */ | |
823 | mdelay(1); | |
824 | ||
825 | /* Restore our exception vector */ | |
826 | *vector = save_vector; | |
827 | flush_icache_range((unsigned long) vector, (unsigned long) vector + 4); | |
828 | ||
829 | local_irq_restore(flags); | |
830 | if (ppc_md.progress) ppc_md.progress("smp_core99_kick_cpu done", 0x347); | |
831 | } | |
832 | ||
833 | static void __devinit smp_core99_setup_cpu(int cpu_nr) | |
834 | { | |
835 | /* Setup L2/L3 */ | |
836 | if (cpu_nr != 0) | |
837 | core99_init_caches(cpu_nr); | |
838 | ||
839 | /* Setup openpic */ | |
840 | mpic_setup_this_cpu(); | |
841 | ||
842 | if (cpu_nr == 0) { | |
1beb6a7d | 843 | #ifdef CONFIG_PPC64 |
35499c01 PM |
844 | extern void g5_phy_disable_cpu1(void); |
845 | ||
1beb6a7d BH |
846 | /* Close i2c bus if it was used for tb sync */ |
847 | if (pmac_tb_clock_chip_host) { | |
730745a5 | 848 | pmac_i2c_close(pmac_tb_clock_chip_host); |
1beb6a7d BH |
849 | pmac_tb_clock_chip_host = NULL; |
850 | } | |
851 | ||
35499c01 PM |
852 | /* If we didn't start the second CPU, we must take |
853 | * it off the bus | |
854 | */ | |
855 | if (machine_is_compatible("MacRISC4") && | |
856 | num_online_cpus() < 2) | |
857 | g5_phy_disable_cpu1(); | |
1beb6a7d BH |
858 | #endif /* CONFIG_PPC64 */ |
859 | ||
860 | if (ppc_md.progress) | |
861 | ppc_md.progress("core99_setup_cpu 0 done", 0x349); | |
35499c01 PM |
862 | } |
863 | } | |
14cf11af | 864 | |
14cf11af | 865 | |
35499c01 | 866 | #if defined(CONFIG_HOTPLUG_CPU) && defined(CONFIG_PPC32) |
14cf11af | 867 | |
094fe2e7 | 868 | int smp_core99_cpu_disable(void) |
14cf11af PM |
869 | { |
870 | cpu_clear(smp_processor_id(), cpu_online_map); | |
871 | ||
872 | /* XXX reset cpu affinity here */ | |
c0c0d996 | 873 | mpic_cpu_set_priority(0xf); |
14cf11af PM |
874 | asm volatile("mtdec %0" : : "r" (0x7fffffff)); |
875 | mb(); | |
876 | udelay(20); | |
877 | asm volatile("mtdec %0" : : "r" (0x7fffffff)); | |
878 | return 0; | |
879 | } | |
880 | ||
35499c01 | 881 | extern void low_cpu_die(void) __attribute__((noreturn)); /* in sleep.S */ |
14cf11af PM |
882 | static int cpu_dead[NR_CPUS]; |
883 | ||
884 | void cpu_die(void) | |
885 | { | |
886 | local_irq_disable(); | |
887 | cpu_dead[smp_processor_id()] = 1; | |
888 | mb(); | |
889 | low_cpu_die(); | |
890 | } | |
891 | ||
094fe2e7 | 892 | void smp_core99_cpu_die(unsigned int cpu) |
14cf11af PM |
893 | { |
894 | int timeout; | |
895 | ||
896 | timeout = 1000; | |
897 | while (!cpu_dead[cpu]) { | |
898 | if (--timeout == 0) { | |
899 | printk("CPU %u refused to die!\n", cpu); | |
900 | break; | |
901 | } | |
902 | msleep(1); | |
903 | } | |
14cf11af PM |
904 | cpu_dead[cpu] = 0; |
905 | } | |
906 | ||
d9333afd | 907 | #endif /* CONFIG_HOTPLUG_CPU && CONFIG_PP32 */ |
094fe2e7 PM |
908 | |
909 | /* Core99 Macs (dual G4s and G5s) */ | |
910 | struct smp_ops_t core99_smp_ops = { | |
911 | .message_pass = smp_mpic_message_pass, | |
912 | .probe = smp_core99_probe, | |
913 | .kick_cpu = smp_core99_kick_cpu, | |
914 | .setup_cpu = smp_core99_setup_cpu, | |
915 | .give_timebase = smp_core99_give_timebase, | |
916 | .take_timebase = smp_core99_take_timebase, | |
d9333afd JB |
917 | #if defined(CONFIG_HOTPLUG_CPU) |
918 | # if defined(CONFIG_PPC32) | |
094fe2e7 PM |
919 | .cpu_disable = smp_core99_cpu_disable, |
920 | .cpu_die = smp_core99_cpu_die, | |
d9333afd JB |
921 | # endif |
922 | # if defined(CONFIG_PPC64) | |
923 | .cpu_disable = generic_cpu_disable, | |
924 | .cpu_die = generic_cpu_die, | |
925 | /* intentionally do *NOT* assign cpu_enable, | |
926 | * the generic code will use kick_cpu then! */ | |
927 | # endif | |
094fe2e7 PM |
928 | #endif |
929 | }; | |
7ccbe504 BH |
930 | |
931 | void __init pmac_setup_smp(void) | |
932 | { | |
933 | struct device_node *np; | |
934 | ||
935 | /* Check for Core99 */ | |
936 | np = of_find_node_by_name(NULL, "uni-n"); | |
937 | if (!np) | |
938 | np = of_find_node_by_name(NULL, "u3"); | |
939 | if (!np) | |
940 | np = of_find_node_by_name(NULL, "u4"); | |
941 | if (np) { | |
942 | of_node_put(np); | |
943 | smp_ops = &core99_smp_ops; | |
944 | } | |
945 | #ifdef CONFIG_PPC32 | |
946 | else { | |
947 | /* We have to set bits in cpu_possible_map here since the | |
948 | * secondary CPU(s) aren't in the device tree. Various | |
949 | * things won't be initialized for CPUs not in the possible | |
950 | * map, so we really need to fix it up here. | |
951 | */ | |
952 | int cpu; | |
953 | ||
954 | for (cpu = 1; cpu < 4 && cpu < NR_CPUS; ++cpu) | |
955 | cpu_set(cpu, cpu_possible_map); | |
956 | smp_ops = &psurge_smp_ops; | |
957 | } | |
958 | #endif /* CONFIG_PPC32 */ | |
959 | } | |
960 |