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Linus Torvalds1da177e2005-04-16 15:20:36 -07001/*
Paul Mackerras033ef332005-10-26 17:05:24 +10002 * 64-bit pSeries and RS/6000 setup code.
Linus Torvalds1da177e2005-04-16 15:20:36 -07003 *
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
Michael Ellerman62d60e92005-07-07 17:56:30 -070019#include <linux/cpu.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070020#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>
Linus Torvalds1da177e2005-04-16 15:20:36 -070028#include <linux/tty.h>
29#include <linux/major.h>
30#include <linux/interrupt.h>
31#include <linux/reboot.h>
32#include <linux/init.h>
33#include <linux/ioport.h>
34#include <linux/console.h>
35#include <linux/pci.h>
Olaf Heringcebb2b12005-07-10 19:35:15 +000036#include <linux/utsname.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070037#include <linux/adb.h>
38#include <linux/module.h>
39#include <linux/delay.h>
40#include <linux/irq.h>
41#include <linux/seq_file.h>
42#include <linux/root_dev.h>
43
44#include <asm/mmu.h>
45#include <asm/processor.h>
46#include <asm/io.h>
47#include <asm/pgtable.h>
48#include <asm/prom.h>
49#include <asm/rtas.h>
50#include <asm/pci-bridge.h>
51#include <asm/iommu.h>
52#include <asm/dma.h>
53#include <asm/machdep.h>
54#include <asm/irq.h>
55#include <asm/time.h>
56#include <asm/nvram.h>
David Gibson007e8f52005-10-28 15:35:50 +100057#include "xics.h"
Michael Ellerman180a3362005-08-09 11:13:36 +100058#include <asm/pmc.h>
Stephen Rothwellbbeb3f42005-09-27 13:51:59 +100059#include <asm/mpic.h>
Stephen Rothwelld3878992005-09-28 02:50:25 +100060#include <asm/ppc-pci.h>
Paul Mackerras69a80d32005-10-10 22:03:41 +100061#include <asm/i8259.h>
62#include <asm/udbg.h>
Paul Mackerras2249ca92005-11-07 13:18:13 +110063#include <asm/smp.h>
Michael Ellerman577830b2007-02-08 18:33:51 +110064#include <asm/firmware.h>
Stephen Rothwellbed59272007-03-04 17:04:44 +110065#include <asm/eeh.h>
Kumar Gala2eb4afb2009-04-30 09:26:21 +000066#include <asm/pSeries_reconfig.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070067
Michael Ellermana1218722005-11-03 15:33:31 +110068#include "plpar_wrappers.h"
Michael Ellerman577830b2007-02-08 18:33:51 +110069#include "pseries.h"
Michael Ellermana1218722005-11-03 15:33:31 +110070
Robert Jennings81f14992008-08-16 05:07:31 +100071int CMO_PrPSP = -1;
72int CMO_SecPSP = -1;
73unsigned long CMO_PageSize = (ASM_CONST(1) << IOMMU_PAGE_SHIFT);
Andrew Mortond617a402008-08-21 11:16:26 +100074EXPORT_SYMBOL(CMO_PageSize);
Linus Torvalds1da177e2005-04-16 15:20:36 -070075
Linus Torvalds1da177e2005-04-16 15:20:36 -070076int fwnmi_active; /* TRUE if an FWNMI handler is present */
77
Paul Mackerrasfbd77402006-03-27 15:06:20 +110078static void pseries_shared_idle_sleep(void);
79static void pseries_dedicated_idle_sleep(void);
Michael Ellerman62d60e92005-07-07 17:56:30 -070080
Benjamin Herrenschmidt0ebfff12006-07-03 21:36:01 +100081static struct device_node *pSeries_mpic_node;
Linus Torvalds1da177e2005-04-16 15:20:36 -070082
Arnd Bergmann84461962006-01-11 00:00:02 +000083static void pSeries_show_cpuinfo(struct seq_file *m)
Linus Torvalds1da177e2005-04-16 15:20:36 -070084{
85 struct device_node *root;
86 const char *model = "";
87
88 root = of_find_node_by_path("/");
89 if (root)
Stephen Rothwelle2eb6392007-04-03 22:26:41 +100090 model = of_get_property(root, "model", NULL);
Linus Torvalds1da177e2005-04-16 15:20:36 -070091 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.
Linus Torvalds1da177e2005-04-16 15:20:36 -070097 */
98static void __init fwnmi_init(void)
99{
Michael Ellerman8c4f1f22005-12-04 18:39:33 +1100100 unsigned long system_reset_addr, machine_check_addr;
101
Linus Torvalds1da177e2005-04-16 15:20:36 -0700102 int ibm_nmi_register = rtas_token("ibm,nmi-register");
103 if (ibm_nmi_register == RTAS_UNKNOWN_SERVICE)
104 return;
Michael Ellerman8c4f1f22005-12-04 18:39:33 +1100105
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))
Linus Torvalds1da177e2005-04-16 15:20:36 -0700113 fwnmi_active = 1;
114}
115
Michael Ellerman541b2752008-05-08 14:27:23 +1000116static void pseries_8259_cascade(unsigned int irq, struct irq_desc *desc)
Benjamin Herrenschmidtb9e5b4e2006-07-03 19:32:51 +1000117{
Olaf Hering35a84c22006-10-07 22:08:26 +1000118 unsigned int cascade_irq = i8259_irq();
Benjamin Herrenschmidt0ebfff12006-07-03 21:36:01 +1000119 if (cascade_irq != NO_IRQ)
David Howells7d12e782006-10-05 14:55:46 +0100120 generic_handle_irq(cascade_irq);
Benjamin Herrenschmidt0ebfff12006-07-03 21:36:01 +1000121 desc->chip->eoi(irq);
Benjamin Herrenschmidtb9e5b4e2006-07-03 19:32:51 +1000122}
123
Michael Ellerman30d6ad22008-04-01 17:42:25 +1100124static void __init pseries_setup_i8259_cascade(void)
Michael Ellerman032ace72008-04-01 17:42:25 +1100125{
126 struct device_node *np, *old, *found = NULL;
Michael Ellerman30d6ad22008-04-01 17:42:25 +1100127 unsigned int cascade;
Michael Ellerman032ace72008-04-01 17:42:25 +1100128 const u32 *addrp;
129 unsigned long intack = 0;
Michael Ellerman30d6ad22008-04-01 17:42:25 +1100130 int naddr;
Michael Ellerman032ace72008-04-01 17:42:25 +1100131
Michael Ellerman30d6ad22008-04-01 17:42:25 +1100132 for_each_node_by_type(np, "interrupt-controller") {
Michael Ellerman032ace72008-04-01 17:42:25 +1100133 if (of_device_is_compatible(np, "chrp,iic")) {
134 found = np;
135 break;
136 }
Michael Ellerman30d6ad22008-04-01 17:42:25 +1100137 }
138
Michael Ellerman032ace72008-04-01 17:42:25 +1100139 if (found == NULL) {
Michael Ellerman30d6ad22008-04-01 17:42:25 +1100140 printk(KERN_DEBUG "pic: no ISA interrupt controller\n");
Michael Ellerman032ace72008-04-01 17:42:25 +1100141 return;
142 }
Michael Ellerman30d6ad22008-04-01 17:42:25 +1100143
Michael Ellerman032ace72008-04-01 17:42:25 +1100144 cascade = irq_of_parse_and_map(found, 0);
145 if (cascade == NO_IRQ) {
Michael Ellerman30d6ad22008-04-01 17:42:25 +1100146 printk(KERN_ERR "pic: failed to map cascade interrupt");
Michael Ellerman032ace72008-04-01 17:42:25 +1100147 return;
148 }
Michael Ellerman30d6ad22008-04-01 17:42:25 +1100149 pr_debug("pic: cascade mapped to irq %d\n", cascade);
Michael Ellerman032ace72008-04-01 17:42:25 +1100150
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)
Michael Ellerman30d6ad22008-04-01 17:42:25 +1100167 printk(KERN_DEBUG "pic: PCI 8259 intack at 0x%016lx\n", intack);
Michael Ellerman032ace72008-04-01 17:42:25 +1100168 i8259_init(found, intack);
169 of_node_put(found);
170 set_irq_chained_handler(cascade, pseries_8259_cascade);
171}
172
Benjamin Herrenschmidt0ebfff12006-07-03 21:36:01 +1000173static void __init pseries_mpic_init_IRQ(void)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700174{
Michael Ellermanf01567d2008-04-01 17:42:26 +1100175 struct device_node *np;
Jeremy Kerr954a46e2006-07-12 15:39:43 +1000176 const unsigned int *opprop;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700177 unsigned long openpic_addr = 0;
Benjamin Herrenschmidt0ebfff12006-07-03 21:36:01 +1000178 int naddr, n, i, opplen;
179 struct mpic *mpic;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700180
Benjamin Herrenschmidt0ebfff12006-07-03 21:36:01 +1000181 np = of_find_node_by_path("/");
Stephen Rothwella8bda5d2007-04-03 10:56:50 +1000182 naddr = of_n_addr_cells(np);
Stephen Rothwelle2eb6392007-04-03 22:26:41 +1000183 opprop = of_get_property(np, "platform-open-pic", &opplen);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700184 if (opprop != 0) {
Benjamin Herrenschmidt0ebfff12006-07-03 21:36:01 +1000185 openpic_addr = of_read_number(opprop, naddr);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700186 printk(KERN_DEBUG "OpenPIC addr: %lx\n", openpic_addr);
187 }
Benjamin Herrenschmidt0ebfff12006-07-03 21:36:01 +1000188 of_node_put(np);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700189
190 BUG_ON(openpic_addr == 0);
191
Linus Torvalds1da177e2005-04-16 15:20:36 -0700192 /* Setup the openpic driver */
Benjamin Herrenschmidt0ebfff12006-07-03 21:36:01 +1000193 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 */
Michael Ellermanf01567d2008-04-01 17:42:26 +1100210 pseries_setup_i8259_cascade();
Linus Torvalds1da177e2005-04-16 15:20:36 -0700211}
212
Michael Ellerman032ace72008-04-01 17:42:25 +1100213static void __init pseries_xics_init_IRQ(void)
214{
215 xics_init_IRQ();
Michael Ellerman30d6ad22008-04-01 17:42:25 +1100216 pseries_setup_i8259_cascade();
Michael Ellerman032ace72008-04-01 17:42:25 +1100217}
218
Michael Ellerman180a3362005-08-09 11:13:36 +1000219static void pseries_lpar_enable_pmcs(void)
220{
221 unsigned long set, reset;
222
Michael Ellerman180a3362005-08-09 11:13:36 +1000223 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))
David Gibson3356bb9f72006-01-13 10:26:42 +1100229 get_lppaca()->pmcregs_in_use = 1;
Michael Ellerman180a3362005-08-09 11:13:36 +1000230}
231
Benjamin Herrenschmidt0ebfff12006-07-03 21:36:01 +1000232static void __init pseries_discover_pic(void)
233{
234 struct device_node *np;
Jeremy Kerr954a46e2006-07-12 15:39:43 +1000235 const char *typep;
Benjamin Herrenschmidt0ebfff12006-07-03 21:36:01 +1000236
237 for (np = NULL; (np = of_find_node_by_name(np,
238 "interrupt-controller"));) {
Stephen Rothwelle2eb6392007-04-03 22:26:41 +1000239 typep = of_get_property(np, "compatible", NULL);
Benjamin Herrenschmidt0ebfff12006-07-03 21:36:01 +1000240 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;
Michael Ellermandce623e2007-02-08 18:33:55 +1100244 setup_kexec_cpu_down_mpic();
Benjamin Herrenschmidt0ebfff12006-07-03 21:36:01 +1000245 smp_init_pseries_mpic();
Benjamin Herrenschmidt0ebfff12006-07-03 21:36:01 +1000246 return;
247 } else if (strstr(typep, "ppc-xicp")) {
Michael Ellerman032ace72008-04-01 17:42:25 +1100248 ppc_md.init_IRQ = pseries_xics_init_IRQ;
Michael Ellermandce623e2007-02-08 18:33:55 +1100249 setup_kexec_cpu_down_xics();
Benjamin Herrenschmidt0ebfff12006-07-03 21:36:01 +1000250 smp_init_pseries_xics();
Benjamin Herrenschmidt0ebfff12006-07-03 21:36:01 +1000251 return;
252 }
253 }
254 printk(KERN_ERR "pSeries_discover_pic: failed to recognize"
255 " interrupt-controller\n");
256}
257
Kumar Gala2eb4afb2009-04-30 09:26:21 +0000258static int pci_dn_reconfig_notifier(struct notifier_block *nb, unsigned long action, void *node)
259{
260 struct device_node *np = node;
261 struct pci_dn *pci = NULL;
262 int err = NOTIFY_OK;
263
264 switch (action) {
265 case PSERIES_RECONFIG_ADD:
266 pci = np->parent->data;
267 if (pci)
268 update_dn_pci_info(np, pci->phb);
269 break;
270 default:
271 err = NOTIFY_DONE;
272 break;
273 }
274 return err;
275}
276
277static struct notifier_block pci_dn_reconfig_nb = {
278 .notifier_call = pci_dn_reconfig_notifier,
279};
280
Linus Torvalds1da177e2005-04-16 15:20:36 -0700281static void __init pSeries_setup_arch(void)
282{
Benjamin Herrenschmidt0ebfff12006-07-03 21:36:01 +1000283 /* Discover PIC type and setup ppc_md accordingly */
284 pseries_discover_pic();
Linus Torvalds1da177e2005-04-16 15:20:36 -0700285
Linus Torvalds1da177e2005-04-16 15:20:36 -0700286 /* openpic global configuration register (64-bit format). */
287 /* openpic Interrupt Source Unit pointer (64-bit format). */
288 /* python0 facility area (mmio) (64-bit format) REAL address. */
289
290 /* init to some ~sane value until calibrate_delay() runs */
291 loops_per_jiffy = 50000000;
292
Linus Torvalds1da177e2005-04-16 15:20:36 -0700293 fwnmi_init();
294
295 /* Find and initialize PCI host bridges */
296 init_pci_config_tokens();
Linus Torvalds1da177e2005-04-16 15:20:36 -0700297 find_and_init_phbs();
Kumar Gala2eb4afb2009-04-30 09:26:21 +0000298 pSeries_reconfig_notifier_register(&pci_dn_reconfig_nb);
Paul Mackerras0160f532005-09-13 20:56:20 +1000299 eeh_init();
Linus Torvalds1da177e2005-04-16 15:20:36 -0700300
Linus Torvalds1da177e2005-04-16 15:20:36 -0700301 pSeries_nvram_init();
302
Michael Ellerman62d60e92005-07-07 17:56:30 -0700303 /* Choose an idle loop */
Stephen Rothwell1ababe12005-08-03 14:35:25 +1000304 if (firmware_has_feature(FW_FEATURE_SPLPAR)) {
Stephen Rothwell8d15a3e2005-08-03 14:40:16 +1000305 vpa_init(boot_cpuid);
David Gibson3356bb9f72006-01-13 10:26:42 +1100306 if (get_lppaca()->shared_proc) {
Olof Johansson4baaf0c2006-04-12 15:23:22 -0500307 printk(KERN_DEBUG "Using shared processor idle loop\n");
Paul Mackerrasfbd77402006-03-27 15:06:20 +1100308 ppc_md.power_save = pseries_shared_idle_sleep;
Michael Ellerman62d60e92005-07-07 17:56:30 -0700309 } else {
Olof Johansson4baaf0c2006-04-12 15:23:22 -0500310 printk(KERN_DEBUG "Using dedicated idle loop\n");
Paul Mackerrasfbd77402006-03-27 15:06:20 +1100311 ppc_md.power_save = pseries_dedicated_idle_sleep;
Michael Ellerman62d60e92005-07-07 17:56:30 -0700312 }
313 } else {
Olof Johansson4baaf0c2006-04-12 15:23:22 -0500314 printk(KERN_DEBUG "Using default idle loop\n");
Michael Ellerman62d60e92005-07-07 17:56:30 -0700315 }
Michael Ellerman180a3362005-08-09 11:13:36 +1000316
Michael Ellerman57cfb812006-03-21 20:45:59 +1100317 if (firmware_has_feature(FW_FEATURE_LPAR))
Michael Ellerman180a3362005-08-09 11:13:36 +1000318 ppc_md.enable_pmcs = pseries_lpar_enable_pmcs;
319 else
320 ppc_md.enable_pmcs = power4_enable_pmcs;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700321}
322
323static int __init pSeries_init_panel(void)
324{
325 /* Manually leave the kernel version on the panel. */
326 ppc_md.progress("Linux ppc64\n", 0);
Serge E. Hallyn96b644b2006-10-02 02:18:13 -0700327 ppc_md.progress(init_utsname()->version, 0);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700328
329 return 0;
330}
331arch_initcall(pSeries_init_panel);
332
Michael Ellermancab0af92005-11-03 15:30:49 +1100333static int pseries_set_dabr(unsigned long dabr)
334{
Michael Ellerman76032de2005-11-07 13:12:03 +1100335 return plpar_hcall_norets(H_SET_DABR, dabr);
Michael Ellermancab0af92005-11-03 15:30:49 +1100336}
337
Michael Ellerman76032de2005-11-07 13:12:03 +1100338static int pseries_set_xdabr(unsigned long dabr)
339{
340 /* We want to catch accesses from kernel and userspace */
341 return plpar_hcall_norets(H_SET_XDABR, dabr,
342 H_DABRX_KERNEL | H_DABRX_USER);
343}
Linus Torvalds1da177e2005-04-16 15:20:36 -0700344
Robert Jenningse46de422008-07-24 04:29:03 +1000345#define CMO_CHARACTERISTICS_TOKEN 44
346#define CMO_MAXLENGTH 1026
347
348/**
349 * fw_cmo_feature_init - FW_FEATURE_CMO is not stored in ibm,hypertas-functions,
350 * handle that here. (Stolen from parse_system_parameter_string)
351 */
352void pSeries_cmo_feature_init(void)
353{
354 char *ptr, *key, *value, *end;
355 int call_status;
Robert Jennings81f14992008-08-16 05:07:31 +1000356 int page_order = IOMMU_PAGE_SHIFT;
Robert Jenningse46de422008-07-24 04:29:03 +1000357
358 pr_debug(" -> fw_cmo_feature_init()\n");
359 spin_lock(&rtas_data_buf_lock);
360 memset(rtas_data_buf, 0, RTAS_DATA_BUF_SIZE);
361 call_status = rtas_call(rtas_token("ibm,get-system-parameter"), 3, 1,
362 NULL,
363 CMO_CHARACTERISTICS_TOKEN,
364 __pa(rtas_data_buf),
365 RTAS_DATA_BUF_SIZE);
366
367 if (call_status != 0) {
368 spin_unlock(&rtas_data_buf_lock);
369 pr_debug("CMO not available\n");
370 pr_debug(" <- fw_cmo_feature_init()\n");
371 return;
372 }
373
374 end = rtas_data_buf + CMO_MAXLENGTH - 2;
375 ptr = rtas_data_buf + 2; /* step over strlen value */
376 key = value = ptr;
377
378 while (*ptr && (ptr <= end)) {
379 /* Separate the key and value by replacing '=' with '\0' and
380 * point the value at the string after the '='
381 */
382 if (ptr[0] == '=') {
383 ptr[0] = '\0';
384 value = ptr + 1;
385 } else if (ptr[0] == '\0' || ptr[0] == ',') {
386 /* Terminate the string containing the key/value pair */
387 ptr[0] = '\0';
388
389 if (key == value) {
390 pr_debug("Malformed key/value pair\n");
391 /* Never found a '=', end processing */
392 break;
393 }
394
Robert Jennings81f14992008-08-16 05:07:31 +1000395 if (0 == strcmp(key, "CMOPageSize"))
396 page_order = simple_strtol(value, NULL, 10);
397 else if (0 == strcmp(key, "PrPSP"))
398 CMO_PrPSP = simple_strtol(value, NULL, 10);
Robert Jenningse46de422008-07-24 04:29:03 +1000399 else if (0 == strcmp(key, "SecPSP"))
Robert Jennings81f14992008-08-16 05:07:31 +1000400 CMO_SecPSP = simple_strtol(value, NULL, 10);
Robert Jenningse46de422008-07-24 04:29:03 +1000401 value = key = ptr + 1;
402 }
403 ptr++;
404 }
405
Robert Jennings81f14992008-08-16 05:07:31 +1000406 /* Page size is returned as the power of 2 of the page size,
407 * convert to the page size in bytes before returning
408 */
409 CMO_PageSize = 1 << page_order;
410 pr_debug("CMO_PageSize = %lu\n", CMO_PageSize);
411
412 if (CMO_PrPSP != -1 || CMO_SecPSP != -1) {
Robert Jenningse46de422008-07-24 04:29:03 +1000413 pr_info("CMO enabled\n");
Robert Jennings81f14992008-08-16 05:07:31 +1000414 pr_debug("CMO enabled, PrPSP=%d, SecPSP=%d\n", CMO_PrPSP,
415 CMO_SecPSP);
Robert Jenningse46de422008-07-24 04:29:03 +1000416 powerpc_firmware_features |= FW_FEATURE_CMO;
417 } else
Robert Jennings81f14992008-08-16 05:07:31 +1000418 pr_debug("CMO not enabled, PrPSP=%d, SecPSP=%d\n", CMO_PrPSP,
419 CMO_SecPSP);
Robert Jenningse46de422008-07-24 04:29:03 +1000420 spin_unlock(&rtas_data_buf_lock);
421 pr_debug(" <- fw_cmo_feature_init()\n");
422}
423
Linus Torvalds1da177e2005-04-16 15:20:36 -0700424/*
425 * Early initialization. Relocation is on but do not reference unbolted pages
426 */
427static void __init pSeries_init_early(void)
428{
Michael Ellermanf7ebf352008-04-24 15:13:19 +1000429 pr_debug(" -> pSeries_init_early()\n");
Linus Torvalds1da177e2005-04-16 15:20:36 -0700430
Michael Ellerman57cfb812006-03-21 20:45:59 +1100431 if (firmware_has_feature(FW_FEATURE_LPAR))
Linus Torvalds1da177e2005-04-16 15:20:36 -0700432 find_udbg_vterm();
Linus Torvalds1da177e2005-04-16 15:20:36 -0700433
Michael Ellerman76032de2005-11-07 13:12:03 +1100434 if (firmware_has_feature(FW_FEATURE_DABR))
Michael Ellermancab0af92005-11-03 15:30:49 +1100435 ppc_md.set_dabr = pseries_set_dabr;
Michael Ellerman76032de2005-11-07 13:12:03 +1100436 else if (firmware_has_feature(FW_FEATURE_XDABR))
437 ppc_md.set_dabr = pseries_set_xdabr;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700438
Robert Jenningse46de422008-07-24 04:29:03 +1000439 pSeries_cmo_feature_init();
Linus Torvalds1da177e2005-04-16 15:20:36 -0700440 iommu_init_early_pSeries();
441
Michael Ellermanf7ebf352008-04-24 15:13:19 +1000442 pr_debug(" <- pSeries_init_early()\n");
Linus Torvalds1da177e2005-04-16 15:20:36 -0700443}
444
Linus Torvalds1da177e2005-04-16 15:20:36 -0700445/*
446 * Called very early, MMU is off, device-tree isn't unflattened
447 */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700448
Benjamin Herrenschmidte8222502006-03-28 23:15:54 +1100449static int __init pSeries_probe_hypertas(unsigned long node,
450 const char *uname, int depth,
451 void *data)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700452{
Michael Neulingca8ffc92007-07-19 07:56:32 +1000453 const char *hypertas;
454 unsigned long len;
455
Benjamin Herrenschmidte8222502006-03-28 23:15:54 +1100456 if (depth != 1 ||
457 (strcmp(uname, "rtas") != 0 && strcmp(uname, "rtas@0") != 0))
Michael Neulingca8ffc92007-07-19 07:56:32 +1000458 return 0;
Benjamin Herrenschmidte8222502006-03-28 23:15:54 +1100459
Michael Neulingca8ffc92007-07-19 07:56:32 +1000460 hypertas = of_get_flat_dt_prop(node, "ibm,hypertas-functions", &len);
461 if (!hypertas)
462 return 1;
Benjamin Herrenschmidte8222502006-03-28 23:15:54 +1100463
Michael Neulingca8ffc92007-07-19 07:56:32 +1000464 powerpc_firmware_features |= FW_FEATURE_LPAR;
465 fw_feature_init(hypertas, len);
466
467 return 1;
Benjamin Herrenschmidte8222502006-03-28 23:15:54 +1100468}
469
470static int __init pSeries_probe(void)
471{
Arnd Bergmann133dda12006-06-07 12:04:18 +1000472 unsigned long root = of_get_flat_dt_root();
Anton Blanchard5773bbc2006-12-08 18:08:37 +1100473 char *dtype = of_get_flat_dt_prop(root, "device_type", NULL);
474
Benjamin Herrenschmidte8222502006-03-28 23:15:54 +1100475 if (dtype == NULL)
476 return 0;
477 if (strcmp(dtype, "chrp"))
Linus Torvalds1da177e2005-04-16 15:20:36 -0700478 return 0;
479
Arnd Bergmann133dda12006-06-07 12:04:18 +1000480 /* Cell blades firmware claims to be chrp while it's not. Until this
481 * is fixed, we need to avoid those here.
482 */
483 if (of_flat_dt_is_compatible(root, "IBM,CPBW-1.0") ||
484 of_flat_dt_is_compatible(root, "IBM,CBEA"))
485 return 0;
486
Michael Ellermanf7ebf352008-04-24 15:13:19 +1000487 pr_debug("pSeries detected, looking for LPAR capability...\n");
Linus Torvalds1da177e2005-04-16 15:20:36 -0700488
Benjamin Herrenschmidte8222502006-03-28 23:15:54 +1100489 /* Now try to figure out if we are running on LPAR */
490 of_scan_flat_dt(pSeries_probe_hypertas, NULL);
491
Anton Blancharda2235352006-12-08 18:22:09 +1100492 if (firmware_has_feature(FW_FEATURE_LPAR))
493 hpte_init_lpar();
494 else
495 hpte_init_native();
496
Michael Ellermanf7ebf352008-04-24 15:13:19 +1000497 pr_debug("Machine is%s LPAR !\n",
498 (powerpc_firmware_features & FW_FEATURE_LPAR) ? "" : " not");
Michael Ellerman57cfb812006-03-21 20:45:59 +1100499
Linus Torvalds1da177e2005-04-16 15:20:36 -0700500 return 1;
501}
502
Benjamin Herrenschmidte8222502006-03-28 23:15:54 +1100503
Michael Ellermanc66d5dd2005-07-07 17:56:29 -0700504DECLARE_PER_CPU(unsigned long, smt_snooze_delay);
505
Paul Mackerrasfbd77402006-03-27 15:06:20 +1100506static void pseries_dedicated_idle_sleep(void)
Paul Mackerras143a1de2005-10-19 23:11:21 +1000507{
Anton Blanchard050a0932005-07-07 17:56:33 -0700508 unsigned int cpu = smp_processor_id();
Michael Ellermanc66d5dd2005-07-07 17:56:29 -0700509 unsigned long start_snooze;
Tony Breeds96366a82008-03-17 16:23:29 +1100510 unsigned long in_purr, out_purr;
Michael Ellermanc66d5dd2005-07-07 17:56:29 -0700511
Paul Mackerrasfbd77402006-03-27 15:06:20 +1100512 /*
513 * Indicate to the HV that we are idle. Now would be
514 * a good time to find other work to dispatch.
515 */
516 get_lppaca()->idle = 1;
Jake Moilanend8c391a2007-06-08 07:27:11 +1000517 get_lppaca()->donate_dedicated_cpu = 1;
Tony Breeds96366a82008-03-17 16:23:29 +1100518 in_purr = mfspr(SPRN_PURR);
Michael Ellermanc66d5dd2005-07-07 17:56:29 -0700519
Paul Mackerrasfbd77402006-03-27 15:06:20 +1100520 /*
521 * We come in with interrupts disabled, and need_resched()
522 * has been checked recently. If we should poll for a little
523 * while, do so.
524 */
Anton Blanchard0ddd3e72006-09-22 20:30:14 +1000525 if (__get_cpu_var(smt_snooze_delay)) {
Paul Mackerrasfbd77402006-03-27 15:06:20 +1100526 start_snooze = get_tb() +
Anton Blanchard0ddd3e72006-09-22 20:30:14 +1000527 __get_cpu_var(smt_snooze_delay) * tb_ticks_per_usec;
Paul Mackerrasfbd77402006-03-27 15:06:20 +1100528 local_irq_enable();
529 set_thread_flag(TIF_POLLING_NRFLAG);
Anton Blanchard050a0932005-07-07 17:56:33 -0700530
Paul Mackerrasfbd77402006-03-27 15:06:20 +1100531 while (get_tb() < start_snooze) {
532 if (need_resched() || cpu_is_offline(cpu))
533 goto out;
534 ppc64_runlatch_off();
535 HMT_low();
536 HMT_very_low();
Michael Ellermanc66d5dd2005-07-07 17:56:29 -0700537 }
538
Paul Mackerrasfbd77402006-03-27 15:06:20 +1100539 HMT_medium();
540 clear_thread_flag(TIF_POLLING_NRFLAG);
541 smp_mb();
542 local_irq_disable();
543 if (need_resched() || cpu_is_offline(cpu))
544 goto out;
Michael Ellermanc66d5dd2005-07-07 17:56:29 -0700545 }
Paul Mackerrasfbd77402006-03-27 15:06:20 +1100546
Anton Blanchard0ddd3e72006-09-22 20:30:14 +1000547 cede_processor();
Paul Mackerrasfbd77402006-03-27 15:06:20 +1100548
549out:
550 HMT_medium();
Tony Breeds96366a82008-03-17 16:23:29 +1100551 out_purr = mfspr(SPRN_PURR);
552 get_lppaca()->wait_state_cycles += out_purr - in_purr;
Jake Moilanend8c391a2007-06-08 07:27:11 +1000553 get_lppaca()->donate_dedicated_cpu = 0;
Paul Mackerrasfbd77402006-03-27 15:06:20 +1100554 get_lppaca()->idle = 0;
Michael Ellermanc66d5dd2005-07-07 17:56:29 -0700555}
556
Paul Mackerrasfbd77402006-03-27 15:06:20 +1100557static void pseries_shared_idle_sleep(void)
Michael Ellermanc66d5dd2005-07-07 17:56:29 -0700558{
Paul Mackerrasfbd77402006-03-27 15:06:20 +1100559 /*
560 * Indicate to the HV that we are idle. Now would be
561 * a good time to find other work to dispatch.
562 */
563 get_lppaca()->idle = 1;
Michael Ellermanc66d5dd2005-07-07 17:56:29 -0700564
Paul Mackerrasfbd77402006-03-27 15:06:20 +1100565 /*
566 * Yield the processor to the hypervisor. We return if
567 * an external interrupt occurs (which are driven prior
568 * to returning here) or if a prod occurs from another
569 * processor. When returning here, external interrupts
570 * are enabled.
571 */
572 cede_processor();
Michael Ellermanc66d5dd2005-07-07 17:56:29 -0700573
Paul Mackerrasfbd77402006-03-27 15:06:20 +1100574 get_lppaca()->idle = 0;
Michael Ellermanc66d5dd2005-07-07 17:56:29 -0700575}
576
Paul Mackerras42672922005-09-12 17:17:36 +1000577static int pSeries_pci_probe_mode(struct pci_bus *bus)
578{
Michael Ellerman57cfb812006-03-21 20:45:59 +1100579 if (firmware_has_feature(FW_FEATURE_LPAR))
Paul Mackerras42672922005-09-12 17:17:36 +1000580 return PCI_PROBE_DEVTREE;
581 return PCI_PROBE_NORMAL;
582}
583
Manish Ahuja5d30bf32007-02-08 16:01:17 -0600584/**
585 * pSeries_power_off - tell firmware about how to power off the system.
586 *
587 * This function calls either the power-off rtas token in normal cases
588 * or the ibm,power-off-ups token (if present & requested) in case of
589 * a power failure. If power-off token is used, power on will only be
590 * possible with power button press. If ibm,power-off-ups token is used
591 * it will allow auto poweron after power is restored.
592 */
Michael Ellerman541b2752008-05-08 14:27:23 +1000593static void pSeries_power_off(void)
Manish Ahuja5d30bf32007-02-08 16:01:17 -0600594{
595 int rc;
596 int rtas_poweroff_ups_token = rtas_token("ibm,power-off-ups");
597
598 if (rtas_flash_term_hook)
599 rtas_flash_term_hook(SYS_POWER_OFF);
600
601 if (rtas_poweron_auto == 0 ||
602 rtas_poweroff_ups_token == RTAS_UNKNOWN_SERVICE) {
603 rc = rtas_call(rtas_token("power-off"), 2, 1, NULL, -1, -1);
604 printk(KERN_INFO "RTAS power-off returned %d\n", rc);
605 } else {
606 rc = rtas_call(rtas_poweroff_ups_token, 0, 1, NULL);
607 printk(KERN_INFO "RTAS ibm,power-off-ups returned %d\n", rc);
608 }
609 for (;;);
610}
611
Stephen Rothwellbed59272007-03-04 17:04:44 +1100612#ifndef CONFIG_PCI
613void pSeries_final_fixup(void) { }
614#endif
615
Benjamin Herrenschmidte8222502006-03-28 23:15:54 +1100616define_machine(pseries) {
617 .name = "pSeries",
Linus Torvalds1da177e2005-04-16 15:20:36 -0700618 .probe = pSeries_probe,
619 .setup_arch = pSeries_setup_arch,
620 .init_early = pSeries_init_early,
Paul Mackerras0dd194d2005-10-20 20:48:19 +1000621 .show_cpuinfo = pSeries_show_cpuinfo,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700622 .log_error = pSeries_log_error,
623 .pcibios_fixup = pSeries_final_fixup,
Paul Mackerras42672922005-09-12 17:17:36 +1000624 .pci_probe_mode = pSeries_pci_probe_mode,
Paul Mackerrasf4fcbbe2005-11-03 14:41:19 +1100625 .restart = rtas_restart,
Manish Ahuja5d30bf32007-02-08 16:01:17 -0600626 .power_off = pSeries_power_off,
Paul Mackerrasf4fcbbe2005-11-03 14:41:19 +1100627 .halt = rtas_halt,
Paul Mackerras8f515062007-12-03 09:30:04 +1100628 .panic = rtas_os_term,
Arnd Bergmann773bf9c2005-06-23 09:43:18 +1000629 .get_boot_time = rtas_get_boot_time,
630 .get_rtc_time = rtas_get_rtc_time,
631 .set_rtc_time = rtas_set_rtc_time,
Arnd Bergmann10f7e7c2005-06-23 09:43:07 +1000632 .calibrate_decr = generic_calibrate_decr,
Arnd Bergmann6566c6f2005-06-23 09:43:28 +1000633 .progress = rtas_progress,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700634 .system_reset_exception = pSeries_system_reset_exception,
635 .machine_check_exception = pSeries_machine_check_exception,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700636};