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Commit | Line | Data |
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1da177e4 | 1 | /* |
033ef338 | 2 | * 64-bit pSeries and RS/6000 setup code. |
1da177e4 LT |
3 | * |
4 | * Copyright (C) 1995 Linus Torvalds | |
5 | * Adapted from 'alpha' version by Gary Thomas | |
6 | * Modified by Cort Dougan (cort@cs.nmt.edu) | |
7 | * Modified by PPC64 Team, IBM Corp | |
8 | * | |
9 | * This program is free software; you can redistribute it and/or | |
10 | * modify it under the terms of the GNU General Public License | |
11 | * as published by the Free Software Foundation; either version | |
12 | * 2 of the License, or (at your option) any later version. | |
13 | */ | |
14 | ||
15 | /* | |
16 | * bootup setup stuff.. | |
17 | */ | |
18 | ||
62d60e9f | 19 | #include <linux/cpu.h> |
1da177e4 LT |
20 | #include <linux/errno.h> |
21 | #include <linux/sched.h> | |
22 | #include <linux/kernel.h> | |
23 | #include <linux/mm.h> | |
24 | #include <linux/stddef.h> | |
25 | #include <linux/unistd.h> | |
1da177e4 | 26 | #include <linux/user.h> |
1da177e4 LT |
27 | #include <linux/tty.h> |
28 | #include <linux/major.h> | |
29 | #include <linux/interrupt.h> | |
30 | #include <linux/reboot.h> | |
31 | #include <linux/init.h> | |
32 | #include <linux/ioport.h> | |
33 | #include <linux/console.h> | |
34 | #include <linux/pci.h> | |
cebb2b15 | 35 | #include <linux/utsname.h> |
1da177e4 | 36 | #include <linux/adb.h> |
4b16f8e2 | 37 | #include <linux/export.h> |
1da177e4 LT |
38 | #include <linux/delay.h> |
39 | #include <linux/irq.h> | |
40 | #include <linux/seq_file.h> | |
41 | #include <linux/root_dev.h> | |
1cf3d8b3 | 42 | #include <linux/of.h> |
705a7b47 | 43 | #include <linux/of_pci.h> |
1da177e4 LT |
44 | |
45 | #include <asm/mmu.h> | |
46 | #include <asm/processor.h> | |
47 | #include <asm/io.h> | |
48 | #include <asm/pgtable.h> | |
49 | #include <asm/prom.h> | |
50 | #include <asm/rtas.h> | |
51 | #include <asm/pci-bridge.h> | |
52 | #include <asm/iommu.h> | |
53 | #include <asm/dma.h> | |
54 | #include <asm/machdep.h> | |
55 | #include <asm/irq.h> | |
56 | #include <asm/time.h> | |
57 | #include <asm/nvram.h> | |
180a3362 | 58 | #include <asm/pmc.h> |
0b05ac6e | 59 | #include <asm/xics.h> |
d387899f | 60 | #include <asm/ppc-pci.h> |
69a80d3f PM |
61 | #include <asm/i8259.h> |
62 | #include <asm/udbg.h> | |
2249ca9d | 63 | #include <asm/smp.h> |
577830b0 | 64 | #include <asm/firmware.h> |
bed59275 | 65 | #include <asm/eeh.h> |
bf99de36 | 66 | #include <asm/reg.h> |
212bebb4 | 67 | #include <asm/plpar_wrappers.h> |
d81d8258 | 68 | #include <asm/kexec.h> |
38e9d36b | 69 | #include <asm/isa-bridge.h> |
1da177e4 | 70 | |
577830b0 | 71 | #include "pseries.h" |
a1218720 | 72 | |
81f14997 RJ |
73 | int CMO_PrPSP = -1; |
74 | int CMO_SecPSP = -1; | |
e589a440 | 75 | unsigned long CMO_PageSize = (ASM_CONST(1) << IOMMU_PAGE_SHIFT_4K); |
d617a402 | 76 | EXPORT_SYMBOL(CMO_PageSize); |
1da177e4 | 77 | |
1da177e4 LT |
78 | int fwnmi_active; /* TRUE if an FWNMI handler is present */ |
79 | ||
8446196a | 80 | static void pSeries_show_cpuinfo(struct seq_file *m) |
1da177e4 LT |
81 | { |
82 | struct device_node *root; | |
83 | const char *model = ""; | |
84 | ||
85 | root = of_find_node_by_path("/"); | |
86 | if (root) | |
e2eb6392 | 87 | model = of_get_property(root, "model", NULL); |
1da177e4 LT |
88 | seq_printf(m, "machine\t\t: CHRP %s\n", model); |
89 | of_node_put(root); | |
3a4c2601 AK |
90 | if (radix_enabled()) |
91 | seq_printf(m, "MMU\t\t: Radix\n"); | |
92 | else | |
93 | seq_printf(m, "MMU\t\t: Hash\n"); | |
1da177e4 LT |
94 | } |
95 | ||
96 | /* Initialize firmware assisted non-maskable interrupts if | |
97 | * the firmware supports this feature. | |
1da177e4 LT |
98 | */ |
99 | static void __init fwnmi_init(void) | |
100 | { | |
8c4f1f29 ME |
101 | unsigned long system_reset_addr, machine_check_addr; |
102 | ||
1da177e4 LT |
103 | int ibm_nmi_register = rtas_token("ibm,nmi-register"); |
104 | if (ibm_nmi_register == RTAS_UNKNOWN_SERVICE) | |
105 | return; | |
8c4f1f29 ME |
106 | |
107 | /* If the kernel's not linked at zero we point the firmware at low | |
108 | * addresses anyway, and use a trampoline to get to the real code. */ | |
109 | system_reset_addr = __pa(system_reset_fwnmi) - PHYSICAL_START; | |
110 | machine_check_addr = __pa(machine_check_fwnmi) - PHYSICAL_START; | |
111 | ||
112 | if (0 == rtas_call(ibm_nmi_register, 2, 1, NULL, system_reset_addr, | |
113 | machine_check_addr)) | |
1da177e4 LT |
114 | fwnmi_active = 1; |
115 | } | |
116 | ||
bd0b9ac4 | 117 | static void pseries_8259_cascade(struct irq_desc *desc) |
b9e5b4e6 | 118 | { |
ec775d0e | 119 | struct irq_chip *chip = irq_desc_get_chip(desc); |
35a84c2f | 120 | unsigned int cascade_irq = i8259_irq(); |
79f26c26 | 121 | |
ef24ba70 | 122 | if (cascade_irq) |
7d12e780 | 123 | generic_handle_irq(cascade_irq); |
79f26c26 LB |
124 | |
125 | chip->irq_eoi(&desc->irq_data); | |
b9e5b4e6 BH |
126 | } |
127 | ||
30d6ad25 | 128 | static void __init pseries_setup_i8259_cascade(void) |
032ace7e ME |
129 | { |
130 | struct device_node *np, *old, *found = NULL; | |
30d6ad25 | 131 | unsigned int cascade; |
032ace7e ME |
132 | const u32 *addrp; |
133 | unsigned long intack = 0; | |
30d6ad25 | 134 | int naddr; |
032ace7e | 135 | |
30d6ad25 | 136 | for_each_node_by_type(np, "interrupt-controller") { |
032ace7e ME |
137 | if (of_device_is_compatible(np, "chrp,iic")) { |
138 | found = np; | |
139 | break; | |
140 | } | |
30d6ad25 ME |
141 | } |
142 | ||
032ace7e | 143 | if (found == NULL) { |
30d6ad25 | 144 | printk(KERN_DEBUG "pic: no ISA interrupt controller\n"); |
032ace7e ME |
145 | return; |
146 | } | |
30d6ad25 | 147 | |
032ace7e | 148 | cascade = irq_of_parse_and_map(found, 0); |
ef24ba70 | 149 | if (!cascade) { |
30d6ad25 | 150 | printk(KERN_ERR "pic: failed to map cascade interrupt"); |
032ace7e ME |
151 | return; |
152 | } | |
30d6ad25 | 153 | pr_debug("pic: cascade mapped to irq %d\n", cascade); |
032ace7e ME |
154 | |
155 | for (old = of_node_get(found); old != NULL ; old = np) { | |
156 | np = of_get_parent(old); | |
157 | of_node_put(old); | |
158 | if (np == NULL) | |
159 | break; | |
160 | if (strcmp(np->name, "pci") != 0) | |
161 | continue; | |
162 | addrp = of_get_property(np, "8259-interrupt-acknowledge", NULL); | |
163 | if (addrp == NULL) | |
164 | continue; | |
165 | naddr = of_n_addr_cells(np); | |
166 | intack = addrp[naddr-1]; | |
167 | if (naddr > 1) | |
168 | intack |= ((unsigned long)addrp[naddr-2]) << 32; | |
169 | } | |
170 | if (intack) | |
30d6ad25 | 171 | printk(KERN_DEBUG "pic: PCI 8259 intack at 0x%016lx\n", intack); |
032ace7e ME |
172 | i8259_init(found, intack); |
173 | of_node_put(found); | |
ec775d0e | 174 | irq_set_chained_handler(cascade, pseries_8259_cascade); |
032ace7e ME |
175 | } |
176 | ||
e7da5dac | 177 | static void __init pseries_init_irq(void) |
032ace7e | 178 | { |
0b05ac6e | 179 | xics_init(); |
30d6ad25 | 180 | pseries_setup_i8259_cascade(); |
032ace7e ME |
181 | } |
182 | ||
180a3362 ME |
183 | static void pseries_lpar_enable_pmcs(void) |
184 | { | |
185 | unsigned long set, reset; | |
186 | ||
180a3362 ME |
187 | set = 1UL << 63; |
188 | reset = 0; | |
189 | plpar_hcall_norets(H_PERFMON, set, reset); | |
180a3362 ME |
190 | } |
191 | ||
f5242e5a | 192 | static int pci_dn_reconfig_notifier(struct notifier_block *nb, unsigned long action, void *data) |
2eb4afb6 | 193 | { |
f5242e5a | 194 | struct of_reconfig_data *rd = data; |
ea0f8acf GS |
195 | struct device_node *parent, *np = rd->dn; |
196 | struct pci_dn *pdn; | |
2eb4afb6 KG |
197 | int err = NOTIFY_OK; |
198 | ||
199 | switch (action) { | |
1cf3d8b3 | 200 | case OF_RECONFIG_ATTACH_NODE: |
ea0f8acf GS |
201 | parent = of_get_parent(np); |
202 | pdn = parent ? PCI_DN(parent) : NULL; | |
8cc7581c | 203 | if (pdn) |
d8f66f41 | 204 | pci_add_device_node_info(pdn->phb, np); |
ea0f8acf GS |
205 | |
206 | of_node_put(parent); | |
2eb4afb6 | 207 | break; |
590c7567 | 208 | case OF_RECONFIG_DETACH_NODE: |
ea0f8acf GS |
209 | pdn = PCI_DN(np); |
210 | if (pdn) | |
211 | list_del(&pdn->list); | |
590c7567 | 212 | break; |
2eb4afb6 KG |
213 | default: |
214 | err = NOTIFY_DONE; | |
215 | break; | |
216 | } | |
217 | return err; | |
218 | } | |
219 | ||
220 | static struct notifier_block pci_dn_reconfig_nb = { | |
221 | .notifier_call = pci_dn_reconfig_notifier, | |
222 | }; | |
223 | ||
af442a1b NA |
224 | struct kmem_cache *dtl_cache; |
225 | ||
abf917cd | 226 | #ifdef CONFIG_VIRT_CPU_ACCOUNTING_NATIVE |
cf9efce0 PM |
227 | /* |
228 | * Allocate space for the dispatch trace log for all possible cpus | |
229 | * and register the buffers with the hypervisor. This is used for | |
230 | * computing time stolen by the hypervisor. | |
231 | */ | |
232 | static int alloc_dispatch_logs(void) | |
233 | { | |
234 | int cpu, ret; | |
235 | struct paca_struct *pp; | |
236 | struct dtl_entry *dtl; | |
237 | ||
238 | if (!firmware_has_feature(FW_FEATURE_SPLPAR)) | |
239 | return 0; | |
240 | ||
af442a1b | 241 | if (!dtl_cache) |
127493d5 | 242 | return 0; |
127493d5 | 243 | |
cf9efce0 PM |
244 | for_each_possible_cpu(cpu) { |
245 | pp = &paca[cpu]; | |
127493d5 | 246 | dtl = kmem_cache_alloc(dtl_cache, GFP_KERNEL); |
cf9efce0 PM |
247 | if (!dtl) { |
248 | pr_warn("Failed to allocate dispatch trace log for cpu %d\n", | |
249 | cpu); | |
250 | pr_warn("Stolen time statistics will be unreliable\n"); | |
251 | break; | |
252 | } | |
253 | ||
254 | pp->dtl_ridx = 0; | |
255 | pp->dispatch_log = dtl; | |
256 | pp->dispatch_log_end = dtl + N_DISPATCH_LOG; | |
257 | pp->dtl_curr = dtl; | |
258 | } | |
259 | ||
260 | /* Register the DTL for the current (boot) cpu */ | |
261 | dtl = get_paca()->dispatch_log; | |
262 | get_paca()->dtl_ridx = 0; | |
263 | get_paca()->dtl_curr = dtl; | |
264 | get_paca()->lppaca_ptr->dtl_idx = 0; | |
265 | ||
266 | /* hypervisor reads buffer length from this field */ | |
7ffcf8ec | 267 | dtl->enqueue_to_dispatch_time = cpu_to_be32(DISPATCH_LOG_BYTES); |
cf9efce0 PM |
268 | ret = register_dtl(hard_smp_processor_id(), __pa(dtl)); |
269 | if (ret) | |
711ef84e AB |
270 | pr_err("WARNING: DTL registration of cpu %d (hw %d) failed " |
271 | "with %d\n", smp_processor_id(), | |
272 | hard_smp_processor_id(), ret); | |
cf9efce0 PM |
273 | get_paca()->lppaca_ptr->dtl_enable_mask = 2; |
274 | ||
275 | return 0; | |
276 | } | |
abf917cd | 277 | #else /* !CONFIG_VIRT_CPU_ACCOUNTING_NATIVE */ |
af442a1b NA |
278 | static inline int alloc_dispatch_logs(void) |
279 | { | |
280 | return 0; | |
281 | } | |
abf917cd | 282 | #endif /* CONFIG_VIRT_CPU_ACCOUNTING_NATIVE */ |
cf9efce0 | 283 | |
af442a1b NA |
284 | static int alloc_dispatch_log_kmem_cache(void) |
285 | { | |
286 | dtl_cache = kmem_cache_create("dtl", DISPATCH_LOG_BYTES, | |
287 | DISPATCH_LOG_BYTES, 0, NULL); | |
288 | if (!dtl_cache) { | |
289 | pr_warn("Failed to create dispatch trace log buffer cache\n"); | |
290 | pr_warn("Stolen time statistics will be unreliable\n"); | |
291 | return 0; | |
292 | } | |
293 | ||
294 | return alloc_dispatch_logs(); | |
295 | } | |
8e83e905 | 296 | machine_early_initcall(pseries, alloc_dispatch_log_kmem_cache); |
af442a1b | 297 | |
363edbe2 | 298 | static void pseries_lpar_idle(void) |
e179816c | 299 | { |
d8c6ad31 NP |
300 | /* |
301 | * Default handler to go into low thread priority and possibly | |
027dfac6 | 302 | * low power mode by ceding processor to hypervisor |
e179816c | 303 | */ |
d8c6ad31 NP |
304 | |
305 | /* Indicate to hypervisor that we are idle. */ | |
306 | get_lppaca()->idle = 1; | |
307 | ||
308 | /* | |
309 | * Yield the processor to the hypervisor. We return if | |
310 | * an external interrupt occurs (which are driven prior | |
311 | * to returning here) or if a prod occurs from another | |
312 | * processor. When returning here, external interrupts | |
313 | * are enabled. | |
314 | */ | |
315 | cede_processor(); | |
316 | ||
317 | get_lppaca()->idle = 0; | |
e179816c DD |
318 | } |
319 | ||
fc8effa4 IM |
320 | /* |
321 | * Enable relocation on during exceptions. This has partition wide scope and | |
322 | * may take a while to complete, if it takes longer than one second we will | |
323 | * just give up rather than wasting any more time on this - if that turns out | |
324 | * to ever be a problem in practice we can move this into a kernel thread to | |
325 | * finish off the process later in boot. | |
326 | */ | |
d3cbff1b | 327 | void pseries_enable_reloc_on_exc(void) |
fc8effa4 IM |
328 | { |
329 | long rc; | |
330 | unsigned int delay, total_delay = 0; | |
331 | ||
332 | while (1) { | |
333 | rc = enable_reloc_on_exceptions(); | |
d3cbff1b BH |
334 | if (!H_IS_LONG_BUSY(rc)) { |
335 | if (rc == H_P2) { | |
336 | pr_info("Relocation on exceptions not" | |
337 | " supported\n"); | |
338 | } else if (rc != H_SUCCESS) { | |
339 | pr_warn("Unable to enable relocation" | |
340 | " on exceptions: %ld\n", rc); | |
341 | } | |
342 | break; | |
343 | } | |
fc8effa4 IM |
344 | |
345 | delay = get_longbusy_msecs(rc); | |
346 | total_delay += delay; | |
347 | if (total_delay > 1000) { | |
348 | pr_warn("Warning: Giving up waiting to enable " | |
349 | "relocation on exceptions (%u msec)!\n", | |
350 | total_delay); | |
d3cbff1b | 351 | return; |
fc8effa4 IM |
352 | } |
353 | ||
354 | mdelay(delay); | |
355 | } | |
356 | } | |
d3cbff1b | 357 | EXPORT_SYMBOL(pseries_enable_reloc_on_exc); |
fc8effa4 | 358 | |
d3cbff1b | 359 | void pseries_disable_reloc_on_exc(void) |
cedddd81 IM |
360 | { |
361 | long rc; | |
362 | ||
363 | while (1) { | |
364 | rc = disable_reloc_on_exceptions(); | |
365 | if (!H_IS_LONG_BUSY(rc)) | |
d3cbff1b | 366 | break; |
cedddd81 IM |
367 | mdelay(get_longbusy_msecs(rc)); |
368 | } | |
d3cbff1b BH |
369 | if (rc != H_SUCCESS) |
370 | pr_warning("Warning: Failed to disable relocation on " | |
371 | "exceptions: %ld\n", rc); | |
cedddd81 | 372 | } |
d3cbff1b | 373 | EXPORT_SYMBOL(pseries_disable_reloc_on_exc); |
cedddd81 | 374 | |
da665885 | 375 | #ifdef CONFIG_KEXEC_CORE |
cedddd81 IM |
376 | static void pSeries_machine_kexec(struct kimage *image) |
377 | { | |
d3cbff1b BH |
378 | if (firmware_has_feature(FW_FEATURE_SET_MODE)) |
379 | pseries_disable_reloc_on_exc(); | |
cedddd81 IM |
380 | |
381 | default_machine_kexec(image); | |
382 | } | |
383 | #endif | |
384 | ||
e844b1ee | 385 | #ifdef __LITTLE_ENDIAN__ |
d3cbff1b | 386 | void pseries_big_endian_exceptions(void) |
e844b1ee AB |
387 | { |
388 | long rc; | |
389 | ||
390 | while (1) { | |
391 | rc = enable_big_endian_exceptions(); | |
392 | if (!H_IS_LONG_BUSY(rc)) | |
d3cbff1b | 393 | break; |
e844b1ee AB |
394 | mdelay(get_longbusy_msecs(rc)); |
395 | } | |
d3cbff1b BH |
396 | |
397 | /* | |
398 | * At this point it is unlikely panic() will get anything | |
399 | * out to the user, since this is called very late in kexec | |
400 | * but at least this will stop us from continuing on further | |
401 | * and creating an even more difficult to debug situation. | |
402 | * | |
403 | * There is a known problem when kdump'ing, if cpus are offline | |
404 | * the above call will fail. Rather than panicking again, keep | |
405 | * going and hope the kdump kernel is also little endian, which | |
406 | * it usually is. | |
407 | */ | |
408 | if (rc && !kdump_in_progress()) | |
409 | panic("Could not enable big endian exceptions"); | |
e844b1ee AB |
410 | } |
411 | ||
d3cbff1b | 412 | void pseries_little_endian_exceptions(void) |
e844b1ee AB |
413 | { |
414 | long rc; | |
415 | ||
416 | while (1) { | |
417 | rc = enable_little_endian_exceptions(); | |
418 | if (!H_IS_LONG_BUSY(rc)) | |
d3cbff1b | 419 | break; |
e844b1ee AB |
420 | mdelay(get_longbusy_msecs(rc)); |
421 | } | |
d3cbff1b BH |
422 | if (rc) { |
423 | ppc_md.progress("H_SET_MODE LE exception fail", 0); | |
424 | panic("Could not enable little endian exceptions"); | |
425 | } | |
e844b1ee AB |
426 | } |
427 | #endif | |
428 | ||
bdc728a8 DA |
429 | static void __init find_and_init_phbs(void) |
430 | { | |
431 | struct device_node *node; | |
432 | struct pci_controller *phb; | |
433 | struct device_node *root = of_find_node_by_path("/"); | |
434 | ||
435 | for_each_child_of_node(root, node) { | |
436 | if (node->type == NULL || (strcmp(node->type, "pci") != 0 && | |
437 | strcmp(node->type, "pciex") != 0)) | |
438 | continue; | |
439 | ||
440 | phb = pcibios_alloc_controller(node); | |
441 | if (!phb) | |
442 | continue; | |
443 | rtas_setup_phb(phb); | |
444 | pci_process_bridge_OF_ranges(phb, node, 0); | |
445 | isa_bridge_find_early(phb); | |
38ae9ec4 | 446 | phb->controller_ops = pseries_pci_controller_ops; |
bdc728a8 DA |
447 | } |
448 | ||
449 | of_node_put(root); | |
bdc728a8 DA |
450 | |
451 | /* | |
452 | * PCI_PROBE_ONLY and PCI_REASSIGN_ALL_BUS can be set via properties | |
453 | * in chosen. | |
454 | */ | |
705a7b47 | 455 | of_pci_check_probe_only(); |
bdc728a8 DA |
456 | } |
457 | ||
ad7b3c45 AM |
458 | static void pSeries_setup_rfi_flush(void) |
459 | { | |
460 | unsigned long character, behaviour, rc; | |
ab39f962 | 461 | enum l1d_flush_type types; |
ad7b3c45 AM |
462 | bool enable; |
463 | ||
7b441ef9 | 464 | /* Enable by default */ |
ad7b3c45 AM |
465 | enable = true; |
466 | ||
467 | rc = plpar_get_cpu_characteristics(&character, &behaviour); | |
468 | if (rc == H_SUCCESS) { | |
ab39f962 | 469 | types = L1D_FLUSH_NONE; |
7b441ef9 | 470 | |
ed0e9c82 | 471 | if (character & H_CPU_CHAR_L1D_FLUSH_TRIG2) |
ab39f962 | 472 | types |= L1D_FLUSH_MTTRIG; |
ed0e9c82 | 473 | if (character & H_CPU_CHAR_L1D_FLUSH_ORI30) |
ab39f962 | 474 | types |= L1D_FLUSH_ORI; |
ad7b3c45 | 475 | |
7b441ef9 ME |
476 | /* Use fallback if nothing set in hcall */ |
477 | if (types == L1D_FLUSH_NONE) | |
478 | types = L1D_FLUSH_FALLBACK; | |
479 | ||
ed0e9c82 | 480 | if (!(behaviour & H_CPU_BEHAV_L1D_FLUSH_PR)) |
ad7b3c45 | 481 | enable = false; |
7b441ef9 ME |
482 | } else { |
483 | /* Default to fallback if case hcall is not available */ | |
484 | types = L1D_FLUSH_FALLBACK; | |
ad7b3c45 AM |
485 | } |
486 | ||
ab39f962 | 487 | setup_rfi_flush(types, enable); |
ad7b3c45 AM |
488 | } |
489 | ||
0ebfff14 BH |
490 | static void __init pSeries_setup_arch(void) |
491 | { | |
b71d47c1 | 492 | set_arch_panic_timeout(10, ARCH_PANIC_TIMEOUT); |
a934904d | 493 | |
0ebfff14 | 494 | /* Discover PIC type and setup ppc_md accordingly */ |
86425bed | 495 | smp_init_pseries(); |
e7da5dac | 496 | |
0ebfff14 | 497 | |
1da177e4 LT |
498 | /* openpic global configuration register (64-bit format). */ |
499 | /* openpic Interrupt Source Unit pointer (64-bit format). */ | |
500 | /* python0 facility area (mmio) (64-bit format) REAL address. */ | |
501 | ||
502 | /* init to some ~sane value until calibrate_delay() runs */ | |
503 | loops_per_jiffy = 50000000; | |
504 | ||
1da177e4 LT |
505 | fwnmi_init(); |
506 | ||
ad7b3c45 AM |
507 | pSeries_setup_rfi_flush(); |
508 | ||
446957ba | 509 | /* By default, only probe PCI (can be overridden by rtas_pci) */ |
673c9756 | 510 | pci_add_flags(PCI_PROBE_ONLY); |
3c13be01 | 511 | |
1da177e4 LT |
512 | /* Find and initialize PCI host bridges */ |
513 | init_pci_config_tokens(); | |
1da177e4 | 514 | find_and_init_phbs(); |
1cf3d8b3 | 515 | of_reconfig_notifier_register(&pci_dn_reconfig_nb); |
1da177e4 | 516 | |
1da177e4 LT |
517 | pSeries_nvram_init(); |
518 | ||
363edbe2 | 519 | if (firmware_has_feature(FW_FEATURE_LPAR)) { |
8d15a3e5 | 520 | vpa_init(boot_cpuid); |
363edbe2 | 521 | ppc_md.power_save = pseries_lpar_idle; |
180a3362 | 522 | ppc_md.enable_pmcs = pseries_lpar_enable_pmcs; |
363edbe2 VS |
523 | } else { |
524 | /* No special idle routine */ | |
180a3362 | 525 | ppc_md.enable_pmcs = power4_enable_pmcs; |
363edbe2 | 526 | } |
fc8effa4 | 527 | |
d82fb31a | 528 | ppc_md.pcibios_root_bridge_prepare = pseries_root_bridge_prepare; |
1da177e4 LT |
529 | } |
530 | ||
531 | static int __init pSeries_init_panel(void) | |
532 | { | |
533 | /* Manually leave the kernel version on the panel. */ | |
983d8a6d | 534 | #ifdef __BIG_ENDIAN__ |
1da177e4 | 535 | ppc_md.progress("Linux ppc64\n", 0); |
983d8a6d TB |
536 | #else |
537 | ppc_md.progress("Linux ppc64le\n", 0); | |
538 | #endif | |
96b644bd | 539 | ppc_md.progress(init_utsname()->version, 0); |
1da177e4 LT |
540 | |
541 | return 0; | |
542 | } | |
f86d6b9b | 543 | machine_arch_initcall(pseries, pSeries_init_panel); |
1da177e4 | 544 | |
4474ef05 | 545 | static int pseries_set_dabr(unsigned long dabr, unsigned long dabrx) |
cab0af98 | 546 | { |
76032de8 | 547 | return plpar_hcall_norets(H_SET_DABR, dabr); |
cab0af98 ME |
548 | } |
549 | ||
4474ef05 | 550 | static int pseries_set_xdabr(unsigned long dabr, unsigned long dabrx) |
76032de8 | 551 | { |
4474ef05 MN |
552 | /* Have to set at least one bit in the DABRX according to PAPR */ |
553 | if (dabrx == 0 && dabr == 0) | |
554 | dabrx = DABRX_USER; | |
555 | /* PAPR says we can only set kernel and user bits */ | |
cd144573 | 556 | dabrx &= DABRX_KERNEL | DABRX_USER; |
4474ef05 MN |
557 | |
558 | return plpar_hcall_norets(H_SET_XDABR, dabr, dabrx); | |
76032de8 | 559 | } |
1da177e4 | 560 | |
bf99de36 MN |
561 | static int pseries_set_dawr(unsigned long dawr, unsigned long dawrx) |
562 | { | |
563 | /* PAPR says we can't set HYP */ | |
564 | dawrx &= ~DAWRX_HYP; | |
565 | ||
566 | return plapr_set_watchpoint0(dawr, dawrx); | |
567 | } | |
568 | ||
e46de429 RJ |
569 | #define CMO_CHARACTERISTICS_TOKEN 44 |
570 | #define CMO_MAXLENGTH 1026 | |
571 | ||
9ee820fa BK |
572 | void pSeries_coalesce_init(void) |
573 | { | |
574 | struct hvcall_mpp_x_data mpp_x_data; | |
575 | ||
576 | if (firmware_has_feature(FW_FEATURE_CMO) && !h_get_mpp_x(&mpp_x_data)) | |
577 | powerpc_firmware_features |= FW_FEATURE_XCMO; | |
578 | else | |
579 | powerpc_firmware_features &= ~FW_FEATURE_XCMO; | |
580 | } | |
581 | ||
e46de429 RJ |
582 | /** |
583 | * fw_cmo_feature_init - FW_FEATURE_CMO is not stored in ibm,hypertas-functions, | |
584 | * handle that here. (Stolen from parse_system_parameter_string) | |
585 | */ | |
e51df2c1 | 586 | static void pSeries_cmo_feature_init(void) |
e46de429 RJ |
587 | { |
588 | char *ptr, *key, *value, *end; | |
589 | int call_status; | |
e589a440 | 590 | int page_order = IOMMU_PAGE_SHIFT_4K; |
e46de429 RJ |
591 | |
592 | pr_debug(" -> fw_cmo_feature_init()\n"); | |
593 | spin_lock(&rtas_data_buf_lock); | |
594 | memset(rtas_data_buf, 0, RTAS_DATA_BUF_SIZE); | |
595 | call_status = rtas_call(rtas_token("ibm,get-system-parameter"), 3, 1, | |
596 | NULL, | |
597 | CMO_CHARACTERISTICS_TOKEN, | |
598 | __pa(rtas_data_buf), | |
599 | RTAS_DATA_BUF_SIZE); | |
600 | ||
601 | if (call_status != 0) { | |
602 | spin_unlock(&rtas_data_buf_lock); | |
603 | pr_debug("CMO not available\n"); | |
604 | pr_debug(" <- fw_cmo_feature_init()\n"); | |
605 | return; | |
606 | } | |
607 | ||
608 | end = rtas_data_buf + CMO_MAXLENGTH - 2; | |
609 | ptr = rtas_data_buf + 2; /* step over strlen value */ | |
610 | key = value = ptr; | |
611 | ||
612 | while (*ptr && (ptr <= end)) { | |
613 | /* Separate the key and value by replacing '=' with '\0' and | |
614 | * point the value at the string after the '=' | |
615 | */ | |
616 | if (ptr[0] == '=') { | |
617 | ptr[0] = '\0'; | |
618 | value = ptr + 1; | |
619 | } else if (ptr[0] == '\0' || ptr[0] == ',') { | |
620 | /* Terminate the string containing the key/value pair */ | |
621 | ptr[0] = '\0'; | |
622 | ||
623 | if (key == value) { | |
624 | pr_debug("Malformed key/value pair\n"); | |
625 | /* Never found a '=', end processing */ | |
626 | break; | |
627 | } | |
628 | ||
81f14997 RJ |
629 | if (0 == strcmp(key, "CMOPageSize")) |
630 | page_order = simple_strtol(value, NULL, 10); | |
631 | else if (0 == strcmp(key, "PrPSP")) | |
632 | CMO_PrPSP = simple_strtol(value, NULL, 10); | |
e46de429 | 633 | else if (0 == strcmp(key, "SecPSP")) |
81f14997 | 634 | CMO_SecPSP = simple_strtol(value, NULL, 10); |
e46de429 RJ |
635 | value = key = ptr + 1; |
636 | } | |
637 | ptr++; | |
638 | } | |
639 | ||
81f14997 RJ |
640 | /* Page size is returned as the power of 2 of the page size, |
641 | * convert to the page size in bytes before returning | |
642 | */ | |
643 | CMO_PageSize = 1 << page_order; | |
644 | pr_debug("CMO_PageSize = %lu\n", CMO_PageSize); | |
645 | ||
646 | if (CMO_PrPSP != -1 || CMO_SecPSP != -1) { | |
e46de429 | 647 | pr_info("CMO enabled\n"); |
81f14997 RJ |
648 | pr_debug("CMO enabled, PrPSP=%d, SecPSP=%d\n", CMO_PrPSP, |
649 | CMO_SecPSP); | |
e46de429 | 650 | powerpc_firmware_features |= FW_FEATURE_CMO; |
9ee820fa | 651 | pSeries_coalesce_init(); |
e46de429 | 652 | } else |
81f14997 RJ |
653 | pr_debug("CMO not enabled, PrPSP=%d, SecPSP=%d\n", CMO_PrPSP, |
654 | CMO_SecPSP); | |
e46de429 RJ |
655 | spin_unlock(&rtas_data_buf_lock); |
656 | pr_debug(" <- fw_cmo_feature_init()\n"); | |
657 | } | |
658 | ||
1da177e4 LT |
659 | /* |
660 | * Early initialization. Relocation is on but do not reference unbolted pages | |
661 | */ | |
f2d57694 | 662 | static void __init pseries_init(void) |
1da177e4 | 663 | { |
f2d57694 | 664 | pr_debug(" -> pseries_init()\n"); |
1da177e4 | 665 | |
4d2bb3f5 | 666 | #ifdef CONFIG_HVC_CONSOLE |
57cfb814 | 667 | if (firmware_has_feature(FW_FEATURE_LPAR)) |
4d2bb3f5 BH |
668 | hvc_vio_init_early(); |
669 | #endif | |
06c88766 | 670 | if (firmware_has_feature(FW_FEATURE_XDABR)) |
76032de8 | 671 | ppc_md.set_dabr = pseries_set_xdabr; |
06c88766 MN |
672 | else if (firmware_has_feature(FW_FEATURE_DABR)) |
673 | ppc_md.set_dabr = pseries_set_dabr; | |
1da177e4 | 674 | |
bf99de36 MN |
675 | if (firmware_has_feature(FW_FEATURE_SET_MODE)) |
676 | ppc_md.set_dawr = pseries_set_dawr; | |
677 | ||
e46de429 | 678 | pSeries_cmo_feature_init(); |
1da177e4 LT |
679 | iommu_init_early_pSeries(); |
680 | ||
f2d57694 | 681 | pr_debug(" <- pseries_init()\n"); |
1da177e4 LT |
682 | } |
683 | ||
9178ba29 AG |
684 | /** |
685 | * pseries_power_off - tell firmware about how to power off the system. | |
686 | * | |
687 | * This function calls either the power-off rtas token in normal cases | |
688 | * or the ibm,power-off-ups token (if present & requested) in case of | |
689 | * a power failure. If power-off token is used, power on will only be | |
690 | * possible with power button press. If ibm,power-off-ups token is used | |
691 | * it will allow auto poweron after power is restored. | |
692 | */ | |
693 | static void pseries_power_off(void) | |
694 | { | |
695 | int rc; | |
696 | int rtas_poweroff_ups_token = rtas_token("ibm,power-off-ups"); | |
697 | ||
698 | if (rtas_flash_term_hook) | |
699 | rtas_flash_term_hook(SYS_POWER_OFF); | |
700 | ||
701 | if (rtas_poweron_auto == 0 || | |
702 | rtas_poweroff_ups_token == RTAS_UNKNOWN_SERVICE) { | |
703 | rc = rtas_call(rtas_token("power-off"), 2, 1, NULL, -1, -1); | |
704 | printk(KERN_INFO "RTAS power-off returned %d\n", rc); | |
705 | } else { | |
706 | rc = rtas_call(rtas_poweroff_ups_token, 0, 1, NULL); | |
707 | printk(KERN_INFO "RTAS ibm,power-off-ups returned %d\n", rc); | |
708 | } | |
709 | for (;;); | |
710 | } | |
711 | ||
e8222502 BH |
712 | static int __init pSeries_probe(void) |
713 | { | |
406b0b6a | 714 | const char *dtype = of_get_property(of_root, "device_type", NULL); |
5773bbcd | 715 | |
e8222502 BH |
716 | if (dtype == NULL) |
717 | return 0; | |
718 | if (strcmp(dtype, "chrp")) | |
1da177e4 LT |
719 | return 0; |
720 | ||
133dda1e AB |
721 | /* Cell blades firmware claims to be chrp while it's not. Until this |
722 | * is fixed, we need to avoid those here. | |
723 | */ | |
406b0b6a BH |
724 | if (of_machine_is_compatible("IBM,CPBW-1.0") || |
725 | of_machine_is_compatible("IBM,CBEA")) | |
133dda1e AB |
726 | return 0; |
727 | ||
9178ba29 AG |
728 | pm_power_off = pseries_power_off; |
729 | ||
f7ebf352 ME |
730 | pr_debug("Machine is%s LPAR !\n", |
731 | (powerpc_firmware_features & FW_FEATURE_LPAR) ? "" : " not"); | |
57cfb814 | 732 | |
f2d57694 BH |
733 | pseries_init(); |
734 | ||
1da177e4 LT |
735 | return 1; |
736 | } | |
737 | ||
4267292b PM |
738 | static int pSeries_pci_probe_mode(struct pci_bus *bus) |
739 | { | |
57cfb814 | 740 | if (firmware_has_feature(FW_FEATURE_LPAR)) |
4267292b PM |
741 | return PCI_PROBE_DEVTREE; |
742 | return PCI_PROBE_NORMAL; | |
743 | } | |
744 | ||
38ae9ec4 DA |
745 | struct pci_controller_ops pseries_pci_controller_ops = { |
746 | .probe_mode = pSeries_pci_probe_mode, | |
747 | }; | |
748 | ||
e8222502 BH |
749 | define_machine(pseries) { |
750 | .name = "pSeries", | |
1da177e4 LT |
751 | .probe = pSeries_probe, |
752 | .setup_arch = pSeries_setup_arch, | |
e7da5dac | 753 | .init_IRQ = pseries_init_irq, |
0dd194d0 | 754 | .show_cpuinfo = pSeries_show_cpuinfo, |
1da177e4 LT |
755 | .log_error = pSeries_log_error, |
756 | .pcibios_fixup = pSeries_final_fixup, | |
f4fcbbe9 | 757 | .restart = rtas_restart, |
f4fcbbe9 | 758 | .halt = rtas_halt, |
773bf9c4 AB |
759 | .get_boot_time = rtas_get_boot_time, |
760 | .get_rtc_time = rtas_get_rtc_time, | |
761 | .set_rtc_time = rtas_set_rtc_time, | |
10f7e7c1 | 762 | .calibrate_decr = generic_calibrate_decr, |
6566c6f1 | 763 | .progress = rtas_progress, |
1da177e4 LT |
764 | .system_reset_exception = pSeries_system_reset_exception, |
765 | .machine_check_exception = pSeries_machine_check_exception, | |
da665885 | 766 | #ifdef CONFIG_KEXEC_CORE |
cedddd81 | 767 | .machine_kexec = pSeries_machine_kexec, |
d739d2ca | 768 | .kexec_cpu_down = pseries_kexec_cpu_down, |
cedddd81 | 769 | #endif |
a5d86257 AB |
770 | #ifdef CONFIG_MEMORY_HOTPLUG_SPARSE |
771 | .memory_block_size = pseries_memory_block_size, | |
772 | #endif | |
1da177e4 | 773 | }; |