Commit | Line | Data |
---|---|---|
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> | |
26 | #include <linux/slab.h> | |
27 | #include <linux/user.h> | |
28 | #include <linux/a.out.h> | |
29 | #include <linux/tty.h> | |
30 | #include <linux/major.h> | |
31 | #include <linux/interrupt.h> | |
32 | #include <linux/reboot.h> | |
33 | #include <linux/init.h> | |
34 | #include <linux/ioport.h> | |
35 | #include <linux/console.h> | |
36 | #include <linux/pci.h> | |
cebb2b15 | 37 | #include <linux/utsname.h> |
1da177e4 LT |
38 | #include <linux/adb.h> |
39 | #include <linux/module.h> | |
40 | #include <linux/delay.h> | |
41 | #include <linux/irq.h> | |
42 | #include <linux/seq_file.h> | |
43 | #include <linux/root_dev.h> | |
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> | |
007e8f51 | 58 | #include "xics.h" |
180a3362 | 59 | #include <asm/pmc.h> |
bbeb3f4c | 60 | #include <asm/mpic.h> |
d387899f | 61 | #include <asm/ppc-pci.h> |
69a80d3f PM |
62 | #include <asm/i8259.h> |
63 | #include <asm/udbg.h> | |
2249ca9d | 64 | #include <asm/smp.h> |
577830b0 | 65 | #include <asm/firmware.h> |
bed59275 | 66 | #include <asm/eeh.h> |
1da177e4 | 67 | |
a1218720 | 68 | #include "plpar_wrappers.h" |
577830b0 | 69 | #include "pseries.h" |
a1218720 | 70 | |
81f14997 RJ |
71 | int CMO_PrPSP = -1; |
72 | int CMO_SecPSP = -1; | |
73 | unsigned long CMO_PageSize = (ASM_CONST(1) << IOMMU_PAGE_SHIFT); | |
d617a402 | 74 | EXPORT_SYMBOL(CMO_PageSize); |
1da177e4 | 75 | |
1da177e4 LT |
76 | int fwnmi_active; /* TRUE if an FWNMI handler is present */ |
77 | ||
fbd7740f PM |
78 | static void pseries_shared_idle_sleep(void); |
79 | static void pseries_dedicated_idle_sleep(void); | |
62d60e9f | 80 | |
0ebfff14 | 81 | static struct device_node *pSeries_mpic_node; |
1da177e4 | 82 | |
8446196a | 83 | static void pSeries_show_cpuinfo(struct seq_file *m) |
1da177e4 LT |
84 | { |
85 | struct device_node *root; | |
86 | const char *model = ""; | |
87 | ||
88 | root = of_find_node_by_path("/"); | |
89 | if (root) | |
e2eb6392 | 90 | model = of_get_property(root, "model", NULL); |
1da177e4 LT |
91 | seq_printf(m, "machine\t\t: CHRP %s\n", model); |
92 | of_node_put(root); | |
93 | } | |
94 | ||
95 | /* Initialize firmware assisted non-maskable interrupts if | |
96 | * the firmware supports this feature. | |
1da177e4 LT |
97 | */ |
98 | static void __init fwnmi_init(void) | |
99 | { | |
8c4f1f29 ME |
100 | unsigned long system_reset_addr, machine_check_addr; |
101 | ||
1da177e4 LT |
102 | int ibm_nmi_register = rtas_token("ibm,nmi-register"); |
103 | if (ibm_nmi_register == RTAS_UNKNOWN_SERVICE) | |
104 | return; | |
8c4f1f29 ME |
105 | |
106 | /* If the kernel's not linked at zero we point the firmware at low | |
107 | * addresses anyway, and use a trampoline to get to the real code. */ | |
108 | system_reset_addr = __pa(system_reset_fwnmi) - PHYSICAL_START; | |
109 | machine_check_addr = __pa(machine_check_fwnmi) - PHYSICAL_START; | |
110 | ||
111 | if (0 == rtas_call(ibm_nmi_register, 2, 1, NULL, system_reset_addr, | |
112 | machine_check_addr)) | |
1da177e4 LT |
113 | fwnmi_active = 1; |
114 | } | |
115 | ||
541b2755 | 116 | static void pseries_8259_cascade(unsigned int irq, struct irq_desc *desc) |
b9e5b4e6 | 117 | { |
35a84c2f | 118 | unsigned int cascade_irq = i8259_irq(); |
0ebfff14 | 119 | if (cascade_irq != NO_IRQ) |
7d12e780 | 120 | generic_handle_irq(cascade_irq); |
0ebfff14 | 121 | desc->chip->eoi(irq); |
b9e5b4e6 BH |
122 | } |
123 | ||
30d6ad25 | 124 | static void __init pseries_setup_i8259_cascade(void) |
032ace7e ME |
125 | { |
126 | struct device_node *np, *old, *found = NULL; | |
30d6ad25 | 127 | unsigned int cascade; |
032ace7e ME |
128 | const u32 *addrp; |
129 | unsigned long intack = 0; | |
30d6ad25 | 130 | int naddr; |
032ace7e | 131 | |
30d6ad25 | 132 | for_each_node_by_type(np, "interrupt-controller") { |
032ace7e ME |
133 | if (of_device_is_compatible(np, "chrp,iic")) { |
134 | found = np; | |
135 | break; | |
136 | } | |
30d6ad25 ME |
137 | } |
138 | ||
032ace7e | 139 | if (found == NULL) { |
30d6ad25 | 140 | printk(KERN_DEBUG "pic: no ISA interrupt controller\n"); |
032ace7e ME |
141 | return; |
142 | } | |
30d6ad25 | 143 | |
032ace7e ME |
144 | cascade = irq_of_parse_and_map(found, 0); |
145 | if (cascade == NO_IRQ) { | |
30d6ad25 | 146 | printk(KERN_ERR "pic: failed to map cascade interrupt"); |
032ace7e ME |
147 | return; |
148 | } | |
30d6ad25 | 149 | pr_debug("pic: cascade mapped to irq %d\n", cascade); |
032ace7e ME |
150 | |
151 | for (old = of_node_get(found); old != NULL ; old = np) { | |
152 | np = of_get_parent(old); | |
153 | of_node_put(old); | |
154 | if (np == NULL) | |
155 | break; | |
156 | if (strcmp(np->name, "pci") != 0) | |
157 | continue; | |
158 | addrp = of_get_property(np, "8259-interrupt-acknowledge", NULL); | |
159 | if (addrp == NULL) | |
160 | continue; | |
161 | naddr = of_n_addr_cells(np); | |
162 | intack = addrp[naddr-1]; | |
163 | if (naddr > 1) | |
164 | intack |= ((unsigned long)addrp[naddr-2]) << 32; | |
165 | } | |
166 | if (intack) | |
30d6ad25 | 167 | printk(KERN_DEBUG "pic: PCI 8259 intack at 0x%016lx\n", intack); |
032ace7e ME |
168 | i8259_init(found, intack); |
169 | of_node_put(found); | |
170 | set_irq_chained_handler(cascade, pseries_8259_cascade); | |
171 | } | |
172 | ||
0ebfff14 | 173 | static void __init pseries_mpic_init_IRQ(void) |
1da177e4 | 174 | { |
f01567d6 | 175 | struct device_node *np; |
954a46e2 | 176 | const unsigned int *opprop; |
1da177e4 | 177 | unsigned long openpic_addr = 0; |
0ebfff14 BH |
178 | int naddr, n, i, opplen; |
179 | struct mpic *mpic; | |
1da177e4 | 180 | |
0ebfff14 | 181 | np = of_find_node_by_path("/"); |
a8bda5dd | 182 | naddr = of_n_addr_cells(np); |
e2eb6392 | 183 | opprop = of_get_property(np, "platform-open-pic", &opplen); |
1da177e4 | 184 | if (opprop != 0) { |
0ebfff14 | 185 | openpic_addr = of_read_number(opprop, naddr); |
1da177e4 LT |
186 | printk(KERN_DEBUG "OpenPIC addr: %lx\n", openpic_addr); |
187 | } | |
0ebfff14 | 188 | of_node_put(np); |
1da177e4 LT |
189 | |
190 | BUG_ON(openpic_addr == 0); | |
191 | ||
1da177e4 | 192 | /* Setup the openpic driver */ |
0ebfff14 BH |
193 | mpic = mpic_alloc(pSeries_mpic_node, openpic_addr, |
194 | MPIC_PRIMARY, | |
195 | 16, 250, /* isu size, irq count */ | |
196 | " MPIC "); | |
197 | BUG_ON(mpic == NULL); | |
198 | ||
199 | /* Add ISUs */ | |
200 | opplen /= sizeof(u32); | |
201 | for (n = 0, i = naddr; i < opplen; i += naddr, n++) { | |
202 | unsigned long isuaddr = of_read_number(opprop + i, naddr); | |
203 | mpic_assign_isu(mpic, n, isuaddr); | |
204 | } | |
205 | ||
206 | /* All ISUs are setup, complete initialization */ | |
207 | mpic_init(mpic); | |
208 | ||
209 | /* Look for cascade */ | |
f01567d6 | 210 | pseries_setup_i8259_cascade(); |
1da177e4 LT |
211 | } |
212 | ||
032ace7e ME |
213 | static void __init pseries_xics_init_IRQ(void) |
214 | { | |
215 | xics_init_IRQ(); | |
30d6ad25 | 216 | pseries_setup_i8259_cascade(); |
032ace7e ME |
217 | } |
218 | ||
180a3362 ME |
219 | static void pseries_lpar_enable_pmcs(void) |
220 | { | |
221 | unsigned long set, reset; | |
222 | ||
180a3362 ME |
223 | set = 1UL << 63; |
224 | reset = 0; | |
225 | plpar_hcall_norets(H_PERFMON, set, reset); | |
226 | ||
227 | /* instruct hypervisor to maintain PMCs */ | |
228 | if (firmware_has_feature(FW_FEATURE_SPLPAR)) | |
3356bb9f | 229 | get_lppaca()->pmcregs_in_use = 1; |
180a3362 ME |
230 | } |
231 | ||
0ebfff14 BH |
232 | static void __init pseries_discover_pic(void) |
233 | { | |
234 | struct device_node *np; | |
954a46e2 | 235 | const char *typep; |
0ebfff14 BH |
236 | |
237 | for (np = NULL; (np = of_find_node_by_name(np, | |
238 | "interrupt-controller"));) { | |
e2eb6392 | 239 | typep = of_get_property(np, "compatible", NULL); |
0ebfff14 BH |
240 | if (strstr(typep, "open-pic")) { |
241 | pSeries_mpic_node = of_node_get(np); | |
242 | ppc_md.init_IRQ = pseries_mpic_init_IRQ; | |
243 | ppc_md.get_irq = mpic_get_irq; | |
dce623e0 | 244 | setup_kexec_cpu_down_mpic(); |
0ebfff14 | 245 | smp_init_pseries_mpic(); |
0ebfff14 BH |
246 | return; |
247 | } else if (strstr(typep, "ppc-xicp")) { | |
032ace7e | 248 | ppc_md.init_IRQ = pseries_xics_init_IRQ; |
dce623e0 | 249 | setup_kexec_cpu_down_xics(); |
0ebfff14 | 250 | smp_init_pseries_xics(); |
0ebfff14 BH |
251 | return; |
252 | } | |
253 | } | |
254 | printk(KERN_ERR "pSeries_discover_pic: failed to recognize" | |
255 | " interrupt-controller\n"); | |
256 | } | |
257 | ||
258 | static void __init pSeries_setup_arch(void) | |
259 | { | |
260 | /* Discover PIC type and setup ppc_md accordingly */ | |
261 | pseries_discover_pic(); | |
262 | ||
1da177e4 LT |
263 | /* openpic global configuration register (64-bit format). */ |
264 | /* openpic Interrupt Source Unit pointer (64-bit format). */ | |
265 | /* python0 facility area (mmio) (64-bit format) REAL address. */ | |
266 | ||
267 | /* init to some ~sane value until calibrate_delay() runs */ | |
268 | loops_per_jiffy = 50000000; | |
269 | ||
1da177e4 LT |
270 | fwnmi_init(); |
271 | ||
272 | /* Find and initialize PCI host bridges */ | |
273 | init_pci_config_tokens(); | |
1da177e4 | 274 | find_and_init_phbs(); |
0160f53e | 275 | eeh_init(); |
1da177e4 | 276 | |
1da177e4 LT |
277 | pSeries_nvram_init(); |
278 | ||
62d60e9f | 279 | /* Choose an idle loop */ |
1ababe11 | 280 | if (firmware_has_feature(FW_FEATURE_SPLPAR)) { |
8d15a3e5 | 281 | vpa_init(boot_cpuid); |
3356bb9f | 282 | if (get_lppaca()->shared_proc) { |
4baaf0cf | 283 | printk(KERN_DEBUG "Using shared processor idle loop\n"); |
fbd7740f | 284 | ppc_md.power_save = pseries_shared_idle_sleep; |
62d60e9f | 285 | } else { |
4baaf0cf | 286 | printk(KERN_DEBUG "Using dedicated idle loop\n"); |
fbd7740f | 287 | ppc_md.power_save = pseries_dedicated_idle_sleep; |
62d60e9f ME |
288 | } |
289 | } else { | |
4baaf0cf | 290 | printk(KERN_DEBUG "Using default idle loop\n"); |
62d60e9f | 291 | } |
180a3362 | 292 | |
57cfb814 | 293 | if (firmware_has_feature(FW_FEATURE_LPAR)) |
180a3362 ME |
294 | ppc_md.enable_pmcs = pseries_lpar_enable_pmcs; |
295 | else | |
296 | ppc_md.enable_pmcs = power4_enable_pmcs; | |
1da177e4 LT |
297 | } |
298 | ||
299 | static int __init pSeries_init_panel(void) | |
300 | { | |
301 | /* Manually leave the kernel version on the panel. */ | |
302 | ppc_md.progress("Linux ppc64\n", 0); | |
96b644bd | 303 | ppc_md.progress(init_utsname()->version, 0); |
1da177e4 LT |
304 | |
305 | return 0; | |
306 | } | |
307 | arch_initcall(pSeries_init_panel); | |
308 | ||
cab0af98 ME |
309 | static int pseries_set_dabr(unsigned long dabr) |
310 | { | |
76032de8 | 311 | return plpar_hcall_norets(H_SET_DABR, dabr); |
cab0af98 ME |
312 | } |
313 | ||
76032de8 ME |
314 | static int pseries_set_xdabr(unsigned long dabr) |
315 | { | |
316 | /* We want to catch accesses from kernel and userspace */ | |
317 | return plpar_hcall_norets(H_SET_XDABR, dabr, | |
318 | H_DABRX_KERNEL | H_DABRX_USER); | |
319 | } | |
1da177e4 | 320 | |
e46de429 RJ |
321 | #define CMO_CHARACTERISTICS_TOKEN 44 |
322 | #define CMO_MAXLENGTH 1026 | |
323 | ||
324 | /** | |
325 | * fw_cmo_feature_init - FW_FEATURE_CMO is not stored in ibm,hypertas-functions, | |
326 | * handle that here. (Stolen from parse_system_parameter_string) | |
327 | */ | |
328 | void pSeries_cmo_feature_init(void) | |
329 | { | |
330 | char *ptr, *key, *value, *end; | |
331 | int call_status; | |
81f14997 | 332 | int page_order = IOMMU_PAGE_SHIFT; |
e46de429 RJ |
333 | |
334 | pr_debug(" -> fw_cmo_feature_init()\n"); | |
335 | spin_lock(&rtas_data_buf_lock); | |
336 | memset(rtas_data_buf, 0, RTAS_DATA_BUF_SIZE); | |
337 | call_status = rtas_call(rtas_token("ibm,get-system-parameter"), 3, 1, | |
338 | NULL, | |
339 | CMO_CHARACTERISTICS_TOKEN, | |
340 | __pa(rtas_data_buf), | |
341 | RTAS_DATA_BUF_SIZE); | |
342 | ||
343 | if (call_status != 0) { | |
344 | spin_unlock(&rtas_data_buf_lock); | |
345 | pr_debug("CMO not available\n"); | |
346 | pr_debug(" <- fw_cmo_feature_init()\n"); | |
347 | return; | |
348 | } | |
349 | ||
350 | end = rtas_data_buf + CMO_MAXLENGTH - 2; | |
351 | ptr = rtas_data_buf + 2; /* step over strlen value */ | |
352 | key = value = ptr; | |
353 | ||
354 | while (*ptr && (ptr <= end)) { | |
355 | /* Separate the key and value by replacing '=' with '\0' and | |
356 | * point the value at the string after the '=' | |
357 | */ | |
358 | if (ptr[0] == '=') { | |
359 | ptr[0] = '\0'; | |
360 | value = ptr + 1; | |
361 | } else if (ptr[0] == '\0' || ptr[0] == ',') { | |
362 | /* Terminate the string containing the key/value pair */ | |
363 | ptr[0] = '\0'; | |
364 | ||
365 | if (key == value) { | |
366 | pr_debug("Malformed key/value pair\n"); | |
367 | /* Never found a '=', end processing */ | |
368 | break; | |
369 | } | |
370 | ||
81f14997 RJ |
371 | if (0 == strcmp(key, "CMOPageSize")) |
372 | page_order = simple_strtol(value, NULL, 10); | |
373 | else if (0 == strcmp(key, "PrPSP")) | |
374 | CMO_PrPSP = simple_strtol(value, NULL, 10); | |
e46de429 | 375 | else if (0 == strcmp(key, "SecPSP")) |
81f14997 | 376 | CMO_SecPSP = simple_strtol(value, NULL, 10); |
e46de429 RJ |
377 | value = key = ptr + 1; |
378 | } | |
379 | ptr++; | |
380 | } | |
381 | ||
81f14997 RJ |
382 | /* Page size is returned as the power of 2 of the page size, |
383 | * convert to the page size in bytes before returning | |
384 | */ | |
385 | CMO_PageSize = 1 << page_order; | |
386 | pr_debug("CMO_PageSize = %lu\n", CMO_PageSize); | |
387 | ||
388 | if (CMO_PrPSP != -1 || CMO_SecPSP != -1) { | |
e46de429 | 389 | pr_info("CMO enabled\n"); |
81f14997 RJ |
390 | pr_debug("CMO enabled, PrPSP=%d, SecPSP=%d\n", CMO_PrPSP, |
391 | CMO_SecPSP); | |
e46de429 RJ |
392 | powerpc_firmware_features |= FW_FEATURE_CMO; |
393 | } else | |
81f14997 RJ |
394 | pr_debug("CMO not enabled, PrPSP=%d, SecPSP=%d\n", CMO_PrPSP, |
395 | CMO_SecPSP); | |
e46de429 RJ |
396 | spin_unlock(&rtas_data_buf_lock); |
397 | pr_debug(" <- fw_cmo_feature_init()\n"); | |
398 | } | |
399 | ||
1da177e4 LT |
400 | /* |
401 | * Early initialization. Relocation is on but do not reference unbolted pages | |
402 | */ | |
403 | static void __init pSeries_init_early(void) | |
404 | { | |
f7ebf352 | 405 | pr_debug(" -> pSeries_init_early()\n"); |
1da177e4 | 406 | |
57cfb814 | 407 | if (firmware_has_feature(FW_FEATURE_LPAR)) |
1da177e4 | 408 | find_udbg_vterm(); |
1da177e4 | 409 | |
76032de8 | 410 | if (firmware_has_feature(FW_FEATURE_DABR)) |
cab0af98 | 411 | ppc_md.set_dabr = pseries_set_dabr; |
76032de8 ME |
412 | else if (firmware_has_feature(FW_FEATURE_XDABR)) |
413 | ppc_md.set_dabr = pseries_set_xdabr; | |
1da177e4 | 414 | |
e46de429 | 415 | pSeries_cmo_feature_init(); |
1da177e4 LT |
416 | iommu_init_early_pSeries(); |
417 | ||
f7ebf352 | 418 | pr_debug(" <- pSeries_init_early()\n"); |
1da177e4 LT |
419 | } |
420 | ||
1da177e4 LT |
421 | /* |
422 | * Called very early, MMU is off, device-tree isn't unflattened | |
423 | */ | |
1da177e4 | 424 | |
e8222502 BH |
425 | static int __init pSeries_probe_hypertas(unsigned long node, |
426 | const char *uname, int depth, | |
427 | void *data) | |
1da177e4 | 428 | { |
ca8ffc97 MN |
429 | const char *hypertas; |
430 | unsigned long len; | |
431 | ||
e8222502 BH |
432 | if (depth != 1 || |
433 | (strcmp(uname, "rtas") != 0 && strcmp(uname, "rtas@0") != 0)) | |
ca8ffc97 MN |
434 | return 0; |
435 | ||
436 | hypertas = of_get_flat_dt_prop(node, "ibm,hypertas-functions", &len); | |
437 | if (!hypertas) | |
438 | return 1; | |
e8222502 | 439 | |
ca8ffc97 MN |
440 | powerpc_firmware_features |= FW_FEATURE_LPAR; |
441 | fw_feature_init(hypertas, len); | |
e8222502 | 442 | |
ca8ffc97 | 443 | return 1; |
e8222502 BH |
444 | } |
445 | ||
446 | static int __init pSeries_probe(void) | |
447 | { | |
133dda1e | 448 | unsigned long root = of_get_flat_dt_root(); |
5773bbcd AB |
449 | char *dtype = of_get_flat_dt_prop(root, "device_type", NULL); |
450 | ||
e8222502 BH |
451 | if (dtype == NULL) |
452 | return 0; | |
453 | if (strcmp(dtype, "chrp")) | |
1da177e4 LT |
454 | return 0; |
455 | ||
133dda1e AB |
456 | /* Cell blades firmware claims to be chrp while it's not. Until this |
457 | * is fixed, we need to avoid those here. | |
458 | */ | |
459 | if (of_flat_dt_is_compatible(root, "IBM,CPBW-1.0") || | |
460 | of_flat_dt_is_compatible(root, "IBM,CBEA")) | |
461 | return 0; | |
462 | ||
f7ebf352 | 463 | pr_debug("pSeries detected, looking for LPAR capability...\n"); |
1da177e4 | 464 | |
e8222502 BH |
465 | /* Now try to figure out if we are running on LPAR */ |
466 | of_scan_flat_dt(pSeries_probe_hypertas, NULL); | |
467 | ||
a2235354 AB |
468 | if (firmware_has_feature(FW_FEATURE_LPAR)) |
469 | hpte_init_lpar(); | |
470 | else | |
471 | hpte_init_native(); | |
472 | ||
f7ebf352 ME |
473 | pr_debug("Machine is%s LPAR !\n", |
474 | (powerpc_firmware_features & FW_FEATURE_LPAR) ? "" : " not"); | |
57cfb814 | 475 | |
1da177e4 LT |
476 | return 1; |
477 | } | |
478 | ||
e8222502 | 479 | |
c66d5dd6 ME |
480 | DECLARE_PER_CPU(unsigned long, smt_snooze_delay); |
481 | ||
fbd7740f | 482 | static void pseries_dedicated_idle_sleep(void) |
143a1dec | 483 | { |
050a0938 | 484 | unsigned int cpu = smp_processor_id(); |
c66d5dd6 | 485 | unsigned long start_snooze; |
96366a8d | 486 | unsigned long in_purr, out_purr; |
c66d5dd6 | 487 | |
fbd7740f PM |
488 | /* |
489 | * Indicate to the HV that we are idle. Now would be | |
490 | * a good time to find other work to dispatch. | |
491 | */ | |
492 | get_lppaca()->idle = 1; | |
d8c391a5 | 493 | get_lppaca()->donate_dedicated_cpu = 1; |
96366a8d | 494 | in_purr = mfspr(SPRN_PURR); |
050a0938 | 495 | |
fbd7740f PM |
496 | /* |
497 | * We come in with interrupts disabled, and need_resched() | |
498 | * has been checked recently. If we should poll for a little | |
499 | * while, do so. | |
500 | */ | |
0ddd3e7d | 501 | if (__get_cpu_var(smt_snooze_delay)) { |
fbd7740f | 502 | start_snooze = get_tb() + |
0ddd3e7d | 503 | __get_cpu_var(smt_snooze_delay) * tb_ticks_per_usec; |
fbd7740f PM |
504 | local_irq_enable(); |
505 | set_thread_flag(TIF_POLLING_NRFLAG); | |
050a0938 | 506 | |
fbd7740f PM |
507 | while (get_tb() < start_snooze) { |
508 | if (need_resched() || cpu_is_offline(cpu)) | |
509 | goto out; | |
510 | ppc64_runlatch_off(); | |
511 | HMT_low(); | |
512 | HMT_very_low(); | |
513 | } | |
514 | ||
515 | HMT_medium(); | |
516 | clear_thread_flag(TIF_POLLING_NRFLAG); | |
517 | smp_mb(); | |
518 | local_irq_disable(); | |
519 | if (need_resched() || cpu_is_offline(cpu)) | |
520 | goto out; | |
c66d5dd6 | 521 | } |
fbd7740f | 522 | |
0ddd3e7d | 523 | cede_processor(); |
fbd7740f PM |
524 | |
525 | out: | |
526 | HMT_medium(); | |
96366a8d TB |
527 | out_purr = mfspr(SPRN_PURR); |
528 | get_lppaca()->wait_state_cycles += out_purr - in_purr; | |
d8c391a5 | 529 | get_lppaca()->donate_dedicated_cpu = 0; |
fbd7740f | 530 | get_lppaca()->idle = 0; |
c66d5dd6 ME |
531 | } |
532 | ||
fbd7740f | 533 | static void pseries_shared_idle_sleep(void) |
c66d5dd6 | 534 | { |
fbd7740f PM |
535 | /* |
536 | * Indicate to the HV that we are idle. Now would be | |
537 | * a good time to find other work to dispatch. | |
538 | */ | |
539 | get_lppaca()->idle = 1; | |
050a0938 | 540 | |
fbd7740f PM |
541 | /* |
542 | * Yield the processor to the hypervisor. We return if | |
543 | * an external interrupt occurs (which are driven prior | |
544 | * to returning here) or if a prod occurs from another | |
545 | * processor. When returning here, external interrupts | |
546 | * are enabled. | |
547 | */ | |
548 | cede_processor(); | |
050a0938 | 549 | |
fbd7740f | 550 | get_lppaca()->idle = 0; |
c66d5dd6 ME |
551 | } |
552 | ||
4267292b PM |
553 | static int pSeries_pci_probe_mode(struct pci_bus *bus) |
554 | { | |
57cfb814 | 555 | if (firmware_has_feature(FW_FEATURE_LPAR)) |
4267292b PM |
556 | return PCI_PROBE_DEVTREE; |
557 | return PCI_PROBE_NORMAL; | |
558 | } | |
559 | ||
5d30bf30 MA |
560 | /** |
561 | * pSeries_power_off - tell firmware about how to power off the system. | |
562 | * | |
563 | * This function calls either the power-off rtas token in normal cases | |
564 | * or the ibm,power-off-ups token (if present & requested) in case of | |
565 | * a power failure. If power-off token is used, power on will only be | |
566 | * possible with power button press. If ibm,power-off-ups token is used | |
567 | * it will allow auto poweron after power is restored. | |
568 | */ | |
541b2755 | 569 | static void pSeries_power_off(void) |
5d30bf30 MA |
570 | { |
571 | int rc; | |
572 | int rtas_poweroff_ups_token = rtas_token("ibm,power-off-ups"); | |
573 | ||
574 | if (rtas_flash_term_hook) | |
575 | rtas_flash_term_hook(SYS_POWER_OFF); | |
576 | ||
577 | if (rtas_poweron_auto == 0 || | |
578 | rtas_poweroff_ups_token == RTAS_UNKNOWN_SERVICE) { | |
579 | rc = rtas_call(rtas_token("power-off"), 2, 1, NULL, -1, -1); | |
580 | printk(KERN_INFO "RTAS power-off returned %d\n", rc); | |
581 | } else { | |
582 | rc = rtas_call(rtas_poweroff_ups_token, 0, 1, NULL); | |
583 | printk(KERN_INFO "RTAS ibm,power-off-ups returned %d\n", rc); | |
584 | } | |
585 | for (;;); | |
586 | } | |
587 | ||
bed59275 SR |
588 | #ifndef CONFIG_PCI |
589 | void pSeries_final_fixup(void) { } | |
590 | #endif | |
591 | ||
e8222502 BH |
592 | define_machine(pseries) { |
593 | .name = "pSeries", | |
1da177e4 LT |
594 | .probe = pSeries_probe, |
595 | .setup_arch = pSeries_setup_arch, | |
596 | .init_early = pSeries_init_early, | |
0dd194d0 | 597 | .show_cpuinfo = pSeries_show_cpuinfo, |
1da177e4 LT |
598 | .log_error = pSeries_log_error, |
599 | .pcibios_fixup = pSeries_final_fixup, | |
4267292b | 600 | .pci_probe_mode = pSeries_pci_probe_mode, |
f4fcbbe9 | 601 | .restart = rtas_restart, |
5d30bf30 | 602 | .power_off = pSeries_power_off, |
f4fcbbe9 | 603 | .halt = rtas_halt, |
8f515061 | 604 | .panic = rtas_os_term, |
773bf9c4 AB |
605 | .get_boot_time = rtas_get_boot_time, |
606 | .get_rtc_time = rtas_get_rtc_time, | |
607 | .set_rtc_time = rtas_set_rtc_time, | |
10f7e7c1 | 608 | .calibrate_decr = generic_calibrate_decr, |
6566c6f1 | 609 | .progress = rtas_progress, |
1da177e4 LT |
610 | .system_reset_exception = pSeries_system_reset_exception, |
611 | .machine_check_exception = pSeries_machine_check_exception, | |
612 | }; |