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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 LT |
36 | #include <linux/adb.h> |
37 | #include <linux/module.h> | |
38 | #include <linux/delay.h> | |
39 | #include <linux/irq.h> | |
40 | #include <linux/seq_file.h> | |
41 | #include <linux/root_dev.h> | |
42 | ||
43 | #include <asm/mmu.h> | |
44 | #include <asm/processor.h> | |
45 | #include <asm/io.h> | |
46 | #include <asm/pgtable.h> | |
47 | #include <asm/prom.h> | |
48 | #include <asm/rtas.h> | |
49 | #include <asm/pci-bridge.h> | |
50 | #include <asm/iommu.h> | |
51 | #include <asm/dma.h> | |
52 | #include <asm/machdep.h> | |
53 | #include <asm/irq.h> | |
54 | #include <asm/time.h> | |
55 | #include <asm/nvram.h> | |
007e8f51 | 56 | #include "xics.h" |
180a3362 | 57 | #include <asm/pmc.h> |
bbeb3f4c | 58 | #include <asm/mpic.h> |
d387899f | 59 | #include <asm/ppc-pci.h> |
69a80d3f PM |
60 | #include <asm/i8259.h> |
61 | #include <asm/udbg.h> | |
2249ca9d | 62 | #include <asm/smp.h> |
577830b0 | 63 | #include <asm/firmware.h> |
bed59275 | 64 | #include <asm/eeh.h> |
2eb4afb6 | 65 | #include <asm/pSeries_reconfig.h> |
1da177e4 | 66 | |
a1218720 | 67 | #include "plpar_wrappers.h" |
577830b0 | 68 | #include "pseries.h" |
a1218720 | 69 | |
81f14997 RJ |
70 | int CMO_PrPSP = -1; |
71 | int CMO_SecPSP = -1; | |
72 | unsigned long CMO_PageSize = (ASM_CONST(1) << IOMMU_PAGE_SHIFT); | |
d617a402 | 73 | EXPORT_SYMBOL(CMO_PageSize); |
1da177e4 | 74 | |
1da177e4 LT |
75 | int fwnmi_active; /* TRUE if an FWNMI handler is present */ |
76 | ||
fbd7740f PM |
77 | static void pseries_shared_idle_sleep(void); |
78 | static void pseries_dedicated_idle_sleep(void); | |
62d60e9f | 79 | |
0ebfff14 | 80 | static struct device_node *pSeries_mpic_node; |
1da177e4 | 81 | |
8446196a | 82 | static void pSeries_show_cpuinfo(struct seq_file *m) |
1da177e4 LT |
83 | { |
84 | struct device_node *root; | |
85 | const char *model = ""; | |
86 | ||
87 | root = of_find_node_by_path("/"); | |
88 | if (root) | |
e2eb6392 | 89 | model = of_get_property(root, "model", NULL); |
1da177e4 LT |
90 | seq_printf(m, "machine\t\t: CHRP %s\n", model); |
91 | of_node_put(root); | |
92 | } | |
93 | ||
94 | /* Initialize firmware assisted non-maskable interrupts if | |
95 | * the firmware supports this feature. | |
1da177e4 LT |
96 | */ |
97 | static void __init fwnmi_init(void) | |
98 | { | |
8c4f1f29 ME |
99 | unsigned long system_reset_addr, machine_check_addr; |
100 | ||
1da177e4 LT |
101 | int ibm_nmi_register = rtas_token("ibm,nmi-register"); |
102 | if (ibm_nmi_register == RTAS_UNKNOWN_SERVICE) | |
103 | return; | |
8c4f1f29 ME |
104 | |
105 | /* If the kernel's not linked at zero we point the firmware at low | |
106 | * addresses anyway, and use a trampoline to get to the real code. */ | |
107 | system_reset_addr = __pa(system_reset_fwnmi) - PHYSICAL_START; | |
108 | machine_check_addr = __pa(machine_check_fwnmi) - PHYSICAL_START; | |
109 | ||
110 | if (0 == rtas_call(ibm_nmi_register, 2, 1, NULL, system_reset_addr, | |
111 | machine_check_addr)) | |
1da177e4 LT |
112 | fwnmi_active = 1; |
113 | } | |
114 | ||
541b2755 | 115 | static void pseries_8259_cascade(unsigned int irq, struct irq_desc *desc) |
b9e5b4e6 | 116 | { |
35a84c2f | 117 | unsigned int cascade_irq = i8259_irq(); |
0ebfff14 | 118 | if (cascade_irq != NO_IRQ) |
7d12e780 | 119 | generic_handle_irq(cascade_irq); |
0ebfff14 | 120 | desc->chip->eoi(irq); |
b9e5b4e6 BH |
121 | } |
122 | ||
30d6ad25 | 123 | static void __init pseries_setup_i8259_cascade(void) |
032ace7e ME |
124 | { |
125 | struct device_node *np, *old, *found = NULL; | |
30d6ad25 | 126 | unsigned int cascade; |
032ace7e ME |
127 | const u32 *addrp; |
128 | unsigned long intack = 0; | |
30d6ad25 | 129 | int naddr; |
032ace7e | 130 | |
30d6ad25 | 131 | for_each_node_by_type(np, "interrupt-controller") { |
032ace7e ME |
132 | if (of_device_is_compatible(np, "chrp,iic")) { |
133 | found = np; | |
134 | break; | |
135 | } | |
30d6ad25 ME |
136 | } |
137 | ||
032ace7e | 138 | if (found == NULL) { |
30d6ad25 | 139 | printk(KERN_DEBUG "pic: no ISA interrupt controller\n"); |
032ace7e ME |
140 | return; |
141 | } | |
30d6ad25 | 142 | |
032ace7e ME |
143 | cascade = irq_of_parse_and_map(found, 0); |
144 | if (cascade == NO_IRQ) { | |
30d6ad25 | 145 | printk(KERN_ERR "pic: failed to map cascade interrupt"); |
032ace7e ME |
146 | return; |
147 | } | |
30d6ad25 | 148 | pr_debug("pic: cascade mapped to irq %d\n", cascade); |
032ace7e ME |
149 | |
150 | for (old = of_node_get(found); old != NULL ; old = np) { | |
151 | np = of_get_parent(old); | |
152 | of_node_put(old); | |
153 | if (np == NULL) | |
154 | break; | |
155 | if (strcmp(np->name, "pci") != 0) | |
156 | continue; | |
157 | addrp = of_get_property(np, "8259-interrupt-acknowledge", NULL); | |
158 | if (addrp == NULL) | |
159 | continue; | |
160 | naddr = of_n_addr_cells(np); | |
161 | intack = addrp[naddr-1]; | |
162 | if (naddr > 1) | |
163 | intack |= ((unsigned long)addrp[naddr-2]) << 32; | |
164 | } | |
165 | if (intack) | |
30d6ad25 | 166 | printk(KERN_DEBUG "pic: PCI 8259 intack at 0x%016lx\n", intack); |
032ace7e ME |
167 | i8259_init(found, intack); |
168 | of_node_put(found); | |
169 | set_irq_chained_handler(cascade, pseries_8259_cascade); | |
170 | } | |
171 | ||
0ebfff14 | 172 | static void __init pseries_mpic_init_IRQ(void) |
1da177e4 | 173 | { |
f01567d6 | 174 | struct device_node *np; |
954a46e2 | 175 | const unsigned int *opprop; |
1da177e4 | 176 | unsigned long openpic_addr = 0; |
0ebfff14 BH |
177 | int naddr, n, i, opplen; |
178 | struct mpic *mpic; | |
1da177e4 | 179 | |
0ebfff14 | 180 | np = of_find_node_by_path("/"); |
a8bda5dd | 181 | naddr = of_n_addr_cells(np); |
e2eb6392 | 182 | opprop = of_get_property(np, "platform-open-pic", &opplen); |
1da177e4 | 183 | if (opprop != 0) { |
0ebfff14 | 184 | openpic_addr = of_read_number(opprop, naddr); |
1da177e4 LT |
185 | printk(KERN_DEBUG "OpenPIC addr: %lx\n", openpic_addr); |
186 | } | |
0ebfff14 | 187 | of_node_put(np); |
1da177e4 LT |
188 | |
189 | BUG_ON(openpic_addr == 0); | |
190 | ||
1da177e4 | 191 | /* Setup the openpic driver */ |
0ebfff14 BH |
192 | mpic = mpic_alloc(pSeries_mpic_node, openpic_addr, |
193 | MPIC_PRIMARY, | |
194 | 16, 250, /* isu size, irq count */ | |
195 | " MPIC "); | |
196 | BUG_ON(mpic == NULL); | |
197 | ||
198 | /* Add ISUs */ | |
199 | opplen /= sizeof(u32); | |
200 | for (n = 0, i = naddr; i < opplen; i += naddr, n++) { | |
201 | unsigned long isuaddr = of_read_number(opprop + i, naddr); | |
202 | mpic_assign_isu(mpic, n, isuaddr); | |
203 | } | |
204 | ||
205 | /* All ISUs are setup, complete initialization */ | |
206 | mpic_init(mpic); | |
207 | ||
208 | /* Look for cascade */ | |
f01567d6 | 209 | pseries_setup_i8259_cascade(); |
1da177e4 LT |
210 | } |
211 | ||
032ace7e ME |
212 | static void __init pseries_xics_init_IRQ(void) |
213 | { | |
214 | xics_init_IRQ(); | |
30d6ad25 | 215 | pseries_setup_i8259_cascade(); |
032ace7e ME |
216 | } |
217 | ||
180a3362 ME |
218 | static void pseries_lpar_enable_pmcs(void) |
219 | { | |
220 | unsigned long set, reset; | |
221 | ||
180a3362 ME |
222 | set = 1UL << 63; |
223 | reset = 0; | |
224 | plpar_hcall_norets(H_PERFMON, set, reset); | |
180a3362 ME |
225 | } |
226 | ||
0ebfff14 BH |
227 | static void __init pseries_discover_pic(void) |
228 | { | |
229 | struct device_node *np; | |
954a46e2 | 230 | const char *typep; |
0ebfff14 BH |
231 | |
232 | for (np = NULL; (np = of_find_node_by_name(np, | |
233 | "interrupt-controller"));) { | |
e2eb6392 | 234 | typep = of_get_property(np, "compatible", NULL); |
0ebfff14 BH |
235 | if (strstr(typep, "open-pic")) { |
236 | pSeries_mpic_node = of_node_get(np); | |
237 | ppc_md.init_IRQ = pseries_mpic_init_IRQ; | |
238 | ppc_md.get_irq = mpic_get_irq; | |
dce623e0 | 239 | setup_kexec_cpu_down_mpic(); |
0ebfff14 | 240 | smp_init_pseries_mpic(); |
0ebfff14 BH |
241 | return; |
242 | } else if (strstr(typep, "ppc-xicp")) { | |
032ace7e | 243 | ppc_md.init_IRQ = pseries_xics_init_IRQ; |
dce623e0 | 244 | setup_kexec_cpu_down_xics(); |
0ebfff14 | 245 | smp_init_pseries_xics(); |
0ebfff14 BH |
246 | return; |
247 | } | |
248 | } | |
249 | printk(KERN_ERR "pSeries_discover_pic: failed to recognize" | |
250 | " interrupt-controller\n"); | |
251 | } | |
252 | ||
2eb4afb6 KG |
253 | static int pci_dn_reconfig_notifier(struct notifier_block *nb, unsigned long action, void *node) |
254 | { | |
255 | struct device_node *np = node; | |
256 | struct pci_dn *pci = NULL; | |
257 | int err = NOTIFY_OK; | |
258 | ||
259 | switch (action) { | |
260 | case PSERIES_RECONFIG_ADD: | |
261 | pci = np->parent->data; | |
262 | if (pci) | |
263 | update_dn_pci_info(np, pci->phb); | |
264 | break; | |
265 | default: | |
266 | err = NOTIFY_DONE; | |
267 | break; | |
268 | } | |
269 | return err; | |
270 | } | |
271 | ||
272 | static struct notifier_block pci_dn_reconfig_nb = { | |
273 | .notifier_call = pci_dn_reconfig_notifier, | |
274 | }; | |
275 | ||
0ebfff14 BH |
276 | static void __init pSeries_setup_arch(void) |
277 | { | |
278 | /* Discover PIC type and setup ppc_md accordingly */ | |
279 | pseries_discover_pic(); | |
280 | ||
1da177e4 LT |
281 | /* openpic global configuration register (64-bit format). */ |
282 | /* openpic Interrupt Source Unit pointer (64-bit format). */ | |
283 | /* python0 facility area (mmio) (64-bit format) REAL address. */ | |
284 | ||
285 | /* init to some ~sane value until calibrate_delay() runs */ | |
286 | loops_per_jiffy = 50000000; | |
287 | ||
1da177e4 LT |
288 | fwnmi_init(); |
289 | ||
290 | /* Find and initialize PCI host bridges */ | |
291 | init_pci_config_tokens(); | |
1da177e4 | 292 | find_and_init_phbs(); |
2eb4afb6 | 293 | pSeries_reconfig_notifier_register(&pci_dn_reconfig_nb); |
0160f53e | 294 | eeh_init(); |
1da177e4 | 295 | |
1da177e4 LT |
296 | pSeries_nvram_init(); |
297 | ||
62d60e9f | 298 | /* Choose an idle loop */ |
1ababe11 | 299 | if (firmware_has_feature(FW_FEATURE_SPLPAR)) { |
8d15a3e5 | 300 | vpa_init(boot_cpuid); |
3356bb9f | 301 | if (get_lppaca()->shared_proc) { |
4baaf0cf | 302 | printk(KERN_DEBUG "Using shared processor idle loop\n"); |
fbd7740f | 303 | ppc_md.power_save = pseries_shared_idle_sleep; |
62d60e9f | 304 | } else { |
4baaf0cf | 305 | printk(KERN_DEBUG "Using dedicated idle loop\n"); |
fbd7740f | 306 | ppc_md.power_save = pseries_dedicated_idle_sleep; |
62d60e9f ME |
307 | } |
308 | } else { | |
4baaf0cf | 309 | printk(KERN_DEBUG "Using default idle loop\n"); |
62d60e9f | 310 | } |
180a3362 | 311 | |
57cfb814 | 312 | if (firmware_has_feature(FW_FEATURE_LPAR)) |
180a3362 ME |
313 | ppc_md.enable_pmcs = pseries_lpar_enable_pmcs; |
314 | else | |
315 | ppc_md.enable_pmcs = power4_enable_pmcs; | |
1da177e4 LT |
316 | } |
317 | ||
318 | static int __init pSeries_init_panel(void) | |
319 | { | |
320 | /* Manually leave the kernel version on the panel. */ | |
321 | ppc_md.progress("Linux ppc64\n", 0); | |
96b644bd | 322 | ppc_md.progress(init_utsname()->version, 0); |
1da177e4 LT |
323 | |
324 | return 0; | |
325 | } | |
326 | arch_initcall(pSeries_init_panel); | |
327 | ||
cab0af98 ME |
328 | static int pseries_set_dabr(unsigned long dabr) |
329 | { | |
76032de8 | 330 | return plpar_hcall_norets(H_SET_DABR, dabr); |
cab0af98 ME |
331 | } |
332 | ||
76032de8 ME |
333 | static int pseries_set_xdabr(unsigned long dabr) |
334 | { | |
335 | /* We want to catch accesses from kernel and userspace */ | |
336 | return plpar_hcall_norets(H_SET_XDABR, dabr, | |
337 | H_DABRX_KERNEL | H_DABRX_USER); | |
338 | } | |
1da177e4 | 339 | |
e46de429 RJ |
340 | #define CMO_CHARACTERISTICS_TOKEN 44 |
341 | #define CMO_MAXLENGTH 1026 | |
342 | ||
343 | /** | |
344 | * fw_cmo_feature_init - FW_FEATURE_CMO is not stored in ibm,hypertas-functions, | |
345 | * handle that here. (Stolen from parse_system_parameter_string) | |
346 | */ | |
347 | void pSeries_cmo_feature_init(void) | |
348 | { | |
349 | char *ptr, *key, *value, *end; | |
350 | int call_status; | |
81f14997 | 351 | int page_order = IOMMU_PAGE_SHIFT; |
e46de429 RJ |
352 | |
353 | pr_debug(" -> fw_cmo_feature_init()\n"); | |
354 | spin_lock(&rtas_data_buf_lock); | |
355 | memset(rtas_data_buf, 0, RTAS_DATA_BUF_SIZE); | |
356 | call_status = rtas_call(rtas_token("ibm,get-system-parameter"), 3, 1, | |
357 | NULL, | |
358 | CMO_CHARACTERISTICS_TOKEN, | |
359 | __pa(rtas_data_buf), | |
360 | RTAS_DATA_BUF_SIZE); | |
361 | ||
362 | if (call_status != 0) { | |
363 | spin_unlock(&rtas_data_buf_lock); | |
364 | pr_debug("CMO not available\n"); | |
365 | pr_debug(" <- fw_cmo_feature_init()\n"); | |
366 | return; | |
367 | } | |
368 | ||
369 | end = rtas_data_buf + CMO_MAXLENGTH - 2; | |
370 | ptr = rtas_data_buf + 2; /* step over strlen value */ | |
371 | key = value = ptr; | |
372 | ||
373 | while (*ptr && (ptr <= end)) { | |
374 | /* Separate the key and value by replacing '=' with '\0' and | |
375 | * point the value at the string after the '=' | |
376 | */ | |
377 | if (ptr[0] == '=') { | |
378 | ptr[0] = '\0'; | |
379 | value = ptr + 1; | |
380 | } else if (ptr[0] == '\0' || ptr[0] == ',') { | |
381 | /* Terminate the string containing the key/value pair */ | |
382 | ptr[0] = '\0'; | |
383 | ||
384 | if (key == value) { | |
385 | pr_debug("Malformed key/value pair\n"); | |
386 | /* Never found a '=', end processing */ | |
387 | break; | |
388 | } | |
389 | ||
81f14997 RJ |
390 | if (0 == strcmp(key, "CMOPageSize")) |
391 | page_order = simple_strtol(value, NULL, 10); | |
392 | else if (0 == strcmp(key, "PrPSP")) | |
393 | CMO_PrPSP = simple_strtol(value, NULL, 10); | |
e46de429 | 394 | else if (0 == strcmp(key, "SecPSP")) |
81f14997 | 395 | CMO_SecPSP = simple_strtol(value, NULL, 10); |
e46de429 RJ |
396 | value = key = ptr + 1; |
397 | } | |
398 | ptr++; | |
399 | } | |
400 | ||
81f14997 RJ |
401 | /* Page size is returned as the power of 2 of the page size, |
402 | * convert to the page size in bytes before returning | |
403 | */ | |
404 | CMO_PageSize = 1 << page_order; | |
405 | pr_debug("CMO_PageSize = %lu\n", CMO_PageSize); | |
406 | ||
407 | if (CMO_PrPSP != -1 || CMO_SecPSP != -1) { | |
e46de429 | 408 | pr_info("CMO enabled\n"); |
81f14997 RJ |
409 | pr_debug("CMO enabled, PrPSP=%d, SecPSP=%d\n", CMO_PrPSP, |
410 | CMO_SecPSP); | |
e46de429 RJ |
411 | powerpc_firmware_features |= FW_FEATURE_CMO; |
412 | } else | |
81f14997 RJ |
413 | pr_debug("CMO not enabled, PrPSP=%d, SecPSP=%d\n", CMO_PrPSP, |
414 | CMO_SecPSP); | |
e46de429 RJ |
415 | spin_unlock(&rtas_data_buf_lock); |
416 | pr_debug(" <- fw_cmo_feature_init()\n"); | |
417 | } | |
418 | ||
1da177e4 LT |
419 | /* |
420 | * Early initialization. Relocation is on but do not reference unbolted pages | |
421 | */ | |
422 | static void __init pSeries_init_early(void) | |
423 | { | |
f7ebf352 | 424 | pr_debug(" -> pSeries_init_early()\n"); |
1da177e4 | 425 | |
57cfb814 | 426 | if (firmware_has_feature(FW_FEATURE_LPAR)) |
1da177e4 | 427 | find_udbg_vterm(); |
1da177e4 | 428 | |
76032de8 | 429 | if (firmware_has_feature(FW_FEATURE_DABR)) |
cab0af98 | 430 | ppc_md.set_dabr = pseries_set_dabr; |
76032de8 ME |
431 | else if (firmware_has_feature(FW_FEATURE_XDABR)) |
432 | ppc_md.set_dabr = pseries_set_xdabr; | |
1da177e4 | 433 | |
e46de429 | 434 | pSeries_cmo_feature_init(); |
1da177e4 LT |
435 | iommu_init_early_pSeries(); |
436 | ||
f7ebf352 | 437 | pr_debug(" <- pSeries_init_early()\n"); |
1da177e4 LT |
438 | } |
439 | ||
1da177e4 LT |
440 | /* |
441 | * Called very early, MMU is off, device-tree isn't unflattened | |
442 | */ | |
1da177e4 | 443 | |
e8222502 BH |
444 | static int __init pSeries_probe_hypertas(unsigned long node, |
445 | const char *uname, int depth, | |
446 | void *data) | |
1da177e4 | 447 | { |
ca8ffc97 MN |
448 | const char *hypertas; |
449 | unsigned long len; | |
450 | ||
e8222502 BH |
451 | if (depth != 1 || |
452 | (strcmp(uname, "rtas") != 0 && strcmp(uname, "rtas@0") != 0)) | |
ca8ffc97 MN |
453 | return 0; |
454 | ||
455 | hypertas = of_get_flat_dt_prop(node, "ibm,hypertas-functions", &len); | |
456 | if (!hypertas) | |
457 | return 1; | |
e8222502 | 458 | |
ca8ffc97 MN |
459 | powerpc_firmware_features |= FW_FEATURE_LPAR; |
460 | fw_feature_init(hypertas, len); | |
e8222502 | 461 | |
ca8ffc97 | 462 | return 1; |
e8222502 BH |
463 | } |
464 | ||
465 | static int __init pSeries_probe(void) | |
466 | { | |
133dda1e | 467 | unsigned long root = of_get_flat_dt_root(); |
5773bbcd AB |
468 | char *dtype = of_get_flat_dt_prop(root, "device_type", NULL); |
469 | ||
e8222502 BH |
470 | if (dtype == NULL) |
471 | return 0; | |
472 | if (strcmp(dtype, "chrp")) | |
1da177e4 LT |
473 | return 0; |
474 | ||
133dda1e AB |
475 | /* Cell blades firmware claims to be chrp while it's not. Until this |
476 | * is fixed, we need to avoid those here. | |
477 | */ | |
478 | if (of_flat_dt_is_compatible(root, "IBM,CPBW-1.0") || | |
479 | of_flat_dt_is_compatible(root, "IBM,CBEA")) | |
480 | return 0; | |
481 | ||
f7ebf352 | 482 | pr_debug("pSeries detected, looking for LPAR capability...\n"); |
1da177e4 | 483 | |
e8222502 BH |
484 | /* Now try to figure out if we are running on LPAR */ |
485 | of_scan_flat_dt(pSeries_probe_hypertas, NULL); | |
486 | ||
a2235354 AB |
487 | if (firmware_has_feature(FW_FEATURE_LPAR)) |
488 | hpte_init_lpar(); | |
489 | else | |
490 | hpte_init_native(); | |
491 | ||
f7ebf352 ME |
492 | pr_debug("Machine is%s LPAR !\n", |
493 | (powerpc_firmware_features & FW_FEATURE_LPAR) ? "" : " not"); | |
57cfb814 | 494 | |
1da177e4 LT |
495 | return 1; |
496 | } | |
497 | ||
e8222502 | 498 | |
c66d5dd6 ME |
499 | DECLARE_PER_CPU(unsigned long, smt_snooze_delay); |
500 | ||
fbd7740f | 501 | static void pseries_dedicated_idle_sleep(void) |
143a1dec | 502 | { |
050a0938 | 503 | unsigned int cpu = smp_processor_id(); |
c66d5dd6 | 504 | unsigned long start_snooze; |
96366a8d | 505 | unsigned long in_purr, out_purr; |
c66d5dd6 | 506 | |
fbd7740f PM |
507 | /* |
508 | * Indicate to the HV that we are idle. Now would be | |
509 | * a good time to find other work to dispatch. | |
510 | */ | |
511 | get_lppaca()->idle = 1; | |
d8c391a5 | 512 | get_lppaca()->donate_dedicated_cpu = 1; |
96366a8d | 513 | in_purr = mfspr(SPRN_PURR); |
050a0938 | 514 | |
fbd7740f PM |
515 | /* |
516 | * We come in with interrupts disabled, and need_resched() | |
517 | * has been checked recently. If we should poll for a little | |
518 | * while, do so. | |
519 | */ | |
0ddd3e7d | 520 | if (__get_cpu_var(smt_snooze_delay)) { |
fbd7740f | 521 | start_snooze = get_tb() + |
0ddd3e7d | 522 | __get_cpu_var(smt_snooze_delay) * tb_ticks_per_usec; |
fbd7740f PM |
523 | local_irq_enable(); |
524 | set_thread_flag(TIF_POLLING_NRFLAG); | |
050a0938 | 525 | |
fbd7740f PM |
526 | while (get_tb() < start_snooze) { |
527 | if (need_resched() || cpu_is_offline(cpu)) | |
528 | goto out; | |
529 | ppc64_runlatch_off(); | |
530 | HMT_low(); | |
531 | HMT_very_low(); | |
532 | } | |
533 | ||
534 | HMT_medium(); | |
535 | clear_thread_flag(TIF_POLLING_NRFLAG); | |
536 | smp_mb(); | |
537 | local_irq_disable(); | |
538 | if (need_resched() || cpu_is_offline(cpu)) | |
539 | goto out; | |
c66d5dd6 | 540 | } |
fbd7740f | 541 | |
0ddd3e7d | 542 | cede_processor(); |
fbd7740f PM |
543 | |
544 | out: | |
545 | HMT_medium(); | |
96366a8d TB |
546 | out_purr = mfspr(SPRN_PURR); |
547 | get_lppaca()->wait_state_cycles += out_purr - in_purr; | |
d8c391a5 | 548 | get_lppaca()->donate_dedicated_cpu = 0; |
fbd7740f | 549 | get_lppaca()->idle = 0; |
c66d5dd6 ME |
550 | } |
551 | ||
fbd7740f | 552 | static void pseries_shared_idle_sleep(void) |
c66d5dd6 | 553 | { |
fbd7740f PM |
554 | /* |
555 | * Indicate to the HV that we are idle. Now would be | |
556 | * a good time to find other work to dispatch. | |
557 | */ | |
558 | get_lppaca()->idle = 1; | |
050a0938 | 559 | |
fbd7740f PM |
560 | /* |
561 | * Yield the processor to the hypervisor. We return if | |
562 | * an external interrupt occurs (which are driven prior | |
563 | * to returning here) or if a prod occurs from another | |
564 | * processor. When returning here, external interrupts | |
565 | * are enabled. | |
566 | */ | |
567 | cede_processor(); | |
050a0938 | 568 | |
fbd7740f | 569 | get_lppaca()->idle = 0; |
c66d5dd6 ME |
570 | } |
571 | ||
4267292b PM |
572 | static int pSeries_pci_probe_mode(struct pci_bus *bus) |
573 | { | |
57cfb814 | 574 | if (firmware_has_feature(FW_FEATURE_LPAR)) |
4267292b PM |
575 | return PCI_PROBE_DEVTREE; |
576 | return PCI_PROBE_NORMAL; | |
577 | } | |
578 | ||
5d30bf30 MA |
579 | /** |
580 | * pSeries_power_off - tell firmware about how to power off the system. | |
581 | * | |
582 | * This function calls either the power-off rtas token in normal cases | |
583 | * or the ibm,power-off-ups token (if present & requested) in case of | |
584 | * a power failure. If power-off token is used, power on will only be | |
585 | * possible with power button press. If ibm,power-off-ups token is used | |
586 | * it will allow auto poweron after power is restored. | |
587 | */ | |
541b2755 | 588 | static void pSeries_power_off(void) |
5d30bf30 MA |
589 | { |
590 | int rc; | |
591 | int rtas_poweroff_ups_token = rtas_token("ibm,power-off-ups"); | |
592 | ||
593 | if (rtas_flash_term_hook) | |
594 | rtas_flash_term_hook(SYS_POWER_OFF); | |
595 | ||
596 | if (rtas_poweron_auto == 0 || | |
597 | rtas_poweroff_ups_token == RTAS_UNKNOWN_SERVICE) { | |
598 | rc = rtas_call(rtas_token("power-off"), 2, 1, NULL, -1, -1); | |
599 | printk(KERN_INFO "RTAS power-off returned %d\n", rc); | |
600 | } else { | |
601 | rc = rtas_call(rtas_poweroff_ups_token, 0, 1, NULL); | |
602 | printk(KERN_INFO "RTAS ibm,power-off-ups returned %d\n", rc); | |
603 | } | |
604 | for (;;); | |
605 | } | |
606 | ||
bed59275 SR |
607 | #ifndef CONFIG_PCI |
608 | void pSeries_final_fixup(void) { } | |
609 | #endif | |
610 | ||
e8222502 BH |
611 | define_machine(pseries) { |
612 | .name = "pSeries", | |
1da177e4 LT |
613 | .probe = pSeries_probe, |
614 | .setup_arch = pSeries_setup_arch, | |
615 | .init_early = pSeries_init_early, | |
0dd194d0 | 616 | .show_cpuinfo = pSeries_show_cpuinfo, |
1da177e4 LT |
617 | .log_error = pSeries_log_error, |
618 | .pcibios_fixup = pSeries_final_fixup, | |
4267292b | 619 | .pci_probe_mode = pSeries_pci_probe_mode, |
f4fcbbe9 | 620 | .restart = rtas_restart, |
5d30bf30 | 621 | .power_off = pSeries_power_off, |
f4fcbbe9 | 622 | .halt = rtas_halt, |
8f515061 | 623 | .panic = rtas_os_term, |
773bf9c4 AB |
624 | .get_boot_time = rtas_get_boot_time, |
625 | .get_rtc_time = rtas_get_rtc_time, | |
626 | .set_rtc_time = rtas_set_rtc_time, | |
10f7e7c1 | 627 | .calibrate_decr = generic_calibrate_decr, |
6566c6f1 | 628 | .progress = rtas_progress, |
1da177e4 LT |
629 | .system_reset_exception = pSeries_system_reset_exception, |
630 | .machine_check_exception = pSeries_machine_check_exception, | |
631 | }; |