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Linus Torvalds1da177e2005-04-16 15:20:36 -07001/*
Alexey Starikovskiy11113f82008-05-14 19:02:57 +04002 * Intel Multiprocessor Specification 1.1 and 1.4
Linus Torvalds1da177e2005-04-16 15:20:36 -07003 * compliant MP-table parsing routines.
4 *
Alan Cox87c6fe22009-01-05 14:08:04 +00005 * (c) 1995 Alan Cox, Building #3 <alan@lxorguk.ukuu.org.uk>
Ingo Molnar8f47e162009-01-31 02:03:42 +01006 * (c) 1998, 1999, 2000, 2009 Ingo Molnar <mingo@redhat.com>
Alexey Starikovskiy85bddde2008-04-04 23:43:18 +04007 * (c) 2008 Alexey Starikovskiy <astarikovskiy@suse.de>
Linus Torvalds1da177e2005-04-16 15:20:36 -07008 */
9
10#include <linux/mm.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070011#include <linux/init.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070012#include <linux/delay.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070013#include <linux/bootmem.h>
Yinghai Lu72d7c3b2010-08-25 13:39:17 -070014#include <linux/memblock.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070015#include <linux/kernel_stat.h>
16#include <linux/mc146818rtc.h>
17#include <linux/bitops.h>
Alexey Starikovskiy85bddde2008-04-04 23:43:18 +040018#include <linux/acpi.h>
19#include <linux/module.h>
Jaswinder Singh Rajput103ceff2009-01-02 23:43:25 +053020#include <linux/smp.h>
Yinghai Lu629e15d2009-05-15 13:05:16 -070021#include <linux/pci.h>
Jiang Liu74501ed2014-06-09 16:19:55 +080022#include <linux/irqdomain.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070023
Linus Torvalds1da177e2005-04-16 15:20:36 -070024#include <asm/mtrr.h>
25#include <asm/mpspec.h>
Alexey Starikovskiy85bddde2008-04-04 23:43:18 +040026#include <asm/pgalloc.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070027#include <asm/io_apic.h>
Alexey Starikovskiy85bddde2008-04-04 23:43:18 +040028#include <asm/proto.h>
Alexey Starikovskiyce3fe6b2008-03-17 22:08:17 +030029#include <asm/bios_ebda.h>
Yinghai Lu2944e162008-06-01 13:17:38 -070030#include <asm/e820.h>
Yinghai Lu3c9cb6d2008-07-19 02:07:25 -070031#include <asm/setup.h>
Jaswinder Singh Rajput4884d8e2009-01-11 18:38:55 +053032#include <asm/smp.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070033
Ingo Molnar7b6aa332009-02-17 13:58:15 +010034#include <asm/apic.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070035/*
Linus Torvalds1da177e2005-04-16 15:20:36 -070036 * Checksum an MP configuration block.
37 */
38
39static int __init mpf_checksum(unsigned char *mp, int len)
40{
41 int sum = 0;
42
43 while (len--)
44 sum += *mp++;
45
46 return sum & 0xFF;
47}
48
Thomas Gleixnerfd6c6662009-08-20 10:41:58 +020049int __init default_mpc_apic_id(struct mpc_cpu *m)
50{
51 return m->apicid;
52}
53
Jaswinder Singh Rajputf4f21b72009-01-03 15:48:52 +053054static void __init MP_processor_info(struct mpc_cpu *m)
Alexey Starikovskiyc853c672008-03-27 23:54:13 +030055{
56 int apicid;
Alexey Starikovskiy746f2242008-04-04 23:42:15 +040057 char *bootup_cpu = "";
Alexey Starikovskiyc853c672008-03-27 23:54:13 +030058
Jaswinder Singh Rajputc4563822009-01-04 21:58:25 +053059 if (!(m->cpuflag & CPU_ENABLED)) {
Glauber Costa7b1292e2008-03-03 14:12:41 -030060 disabled_cpus++;
Linus Torvalds1da177e2005-04-16 15:20:36 -070061 return;
Glauber Costa7b1292e2008-03-03 14:12:41 -030062 }
Yinghai Lu64898a82008-07-19 18:01:16 -070063
Thomas Gleixnerfd6c6662009-08-20 10:41:58 +020064 apicid = x86_init.mpparse.mpc_apic_id(m);
Yinghai Lu64898a82008-07-19 18:01:16 -070065
Jaswinder Singh Rajputc4563822009-01-04 21:58:25 +053066 if (m->cpuflag & CPU_BOOTPROCESSOR) {
Alexey Starikovskiy746f2242008-04-04 23:42:15 +040067 bootup_cpu = " (Bootup-CPU)";
Jaswinder Singh Rajputc4563822009-01-04 21:58:25 +053068 boot_cpu_physical_apicid = m->apicid;
Linus Torvalds1da177e2005-04-16 15:20:36 -070069 }
70
Jiang Liub1bfd5e2014-06-09 16:19:31 +080071 pr_info("Processor #%d%s\n", m->apicid, bootup_cpu);
Jaswinder Singh Rajputc4563822009-01-04 21:58:25 +053072 generic_processor_info(apicid, m->apicver);
Linus Torvalds1da177e2005-04-16 15:20:36 -070073}
74
Thomas Gleixner85cc35f2008-05-25 21:21:36 +020075#ifdef CONFIG_X86_IO_APIC
Thomas Gleixner90e1c692009-08-20 12:34:47 +020076void __init default_mpc_oem_bus_info(struct mpc_bus *m, char *str)
77{
78 memcpy(str, m->bustype, 6);
79 str[6] = 0;
80 apic_printk(APIC_VERBOSE, "Bus #%d is %s\n", m->busid, str);
81}
82
Jaswinder Singh Rajput00fb8602009-01-03 15:47:32 +053083static void __init MP_bus_info(struct mpc_bus *m)
Linus Torvalds1da177e2005-04-16 15:20:36 -070084{
85 char str[7];
Linus Torvalds1da177e2005-04-16 15:20:36 -070086
Thomas Gleixner90e1c692009-08-20 12:34:47 +020087 x86_init.mpparse.mpc_oem_bus_info(m, str);
Linus Torvalds1da177e2005-04-16 15:20:36 -070088
Andi Kleen5e4edbb2006-09-26 10:52:35 +020089#if MAX_MP_BUSSES < 256
Jaswinder Singh Rajputd4c715f2009-01-04 21:59:26 +053090 if (m->busid >= MAX_MP_BUSSES) {
Jiang Liub1bfd5e2014-06-09 16:19:31 +080091 pr_warn("MP table busid value (%d) for bustype %s is too large, max. supported is %d\n",
92 m->busid, str, MAX_MP_BUSSES - 1);
Randy Dunlapc0ec31a2006-04-10 22:53:13 -070093 return;
94 }
Andi Kleen5e4edbb2006-09-26 10:52:35 +020095#endif
Randy Dunlapc0ec31a2006-04-10 22:53:13 -070096
Bjorn Helgaas9e686662011-09-25 15:29:00 -060097 set_bit(m->busid, mp_bus_not_pci);
Alexey Starikovskiyf8924e72008-04-04 23:42:21 +040098 if (strncmp(str, BUSTYPE_ISA, sizeof(BUSTYPE_ISA) - 1) == 0) {
Paul Gortmakerbb8187d2012-05-17 19:06:13 -040099#ifdef CONFIG_EISA
Jaswinder Singh Rajputd4c715f2009-01-04 21:59:26 +0530100 mp_bus_id_to_type[m->busid] = MP_BUS_ISA;
Alexey Starikovskiyf8924e72008-04-04 23:42:21 +0400101#endif
102 } else if (strncmp(str, BUSTYPE_PCI, sizeof(BUSTYPE_PCI) - 1) == 0) {
Thomas Gleixner52fdb562009-08-20 12:45:33 +0200103 if (x86_init.mpparse.mpc_oem_pci_bus)
104 x86_init.mpparse.mpc_oem_pci_bus(m);
Yinghai Lu64898a82008-07-19 18:01:16 -0700105
Jaswinder Singh Rajputd4c715f2009-01-04 21:59:26 +0530106 clear_bit(m->busid, mp_bus_not_pci);
Paul Gortmakerbb8187d2012-05-17 19:06:13 -0400107#ifdef CONFIG_EISA
Jaswinder Singh Rajputd4c715f2009-01-04 21:59:26 +0530108 mp_bus_id_to_type[m->busid] = MP_BUS_PCI;
Alexey Starikovskiy4ef81292008-04-04 23:42:03 +0400109 } else if (strncmp(str, BUSTYPE_EISA, sizeof(BUSTYPE_EISA) - 1) == 0) {
Jaswinder Singh Rajputd4c715f2009-01-04 21:59:26 +0530110 mp_bus_id_to_type[m->busid] = MP_BUS_EISA;
Alexey Starikovskiyc0a282c2008-03-20 14:55:02 +0300111#endif
Alexey Starikovskiyf8924e72008-04-04 23:42:21 +0400112 } else
Jiang Liub1bfd5e2014-06-09 16:19:31 +0800113 pr_warn("Unknown bustype %s - ignoring\n", str);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700114}
Alexey Starikovskiy61048c62008-04-04 23:41:07 +0400115
Jiang Liu95060632014-06-09 16:20:00 +0800116static struct irq_domain_ops mp_ioapic_irqdomain_ops = {
117 .map = mp_irqdomain_map,
Jiang Liuc03b3b02014-06-09 16:20:08 +0800118 .unmap = mp_irqdomain_unmap,
Jiang Liu95060632014-06-09 16:20:00 +0800119};
Jiang Liu74501ed2014-06-09 16:19:55 +0800120
Jaswinder Singh Rajput2b85b5f2009-01-03 15:49:57 +0530121static void __init MP_ioapic_info(struct mpc_ioapic *m)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700122{
Jiang Liu74501ed2014-06-09 16:19:55 +0800123 struct ioapic_domain_cfg cfg = {
124 .type = IOAPIC_DOMAIN_LEGACY,
125 .ops = &mp_ioapic_irqdomain_ops,
126 };
127
Feng Tang0e3fa132010-12-08 15:18:57 +0800128 if (m->flags & MPC_APIC_USABLE)
Jiang Liu74501ed2014-06-09 16:19:55 +0800129 mp_register_ioapic(m->apicid, m->apicaddr, gsi_top, &cfg);
Yinghai Lu2944e162008-06-01 13:17:38 -0700130}
131
Jaswinder Singh Rajputc2c21742009-01-12 17:47:22 +0530132static void __init print_mp_irq_info(struct mpc_intsrc *mp_irq)
Yinghai Lu2944e162008-06-01 13:17:38 -0700133{
Jiang Liub1bfd5e2014-06-09 16:19:31 +0800134 apic_printk(APIC_VERBOSE,
135 "Int: type %d, pol %d, trig %d, bus %02x, IRQ %02x, APIC ID %x, APIC INT %02x\n",
Jaswinder Singh Rajputc2c21742009-01-12 17:47:22 +0530136 mp_irq->irqtype, mp_irq->irqflag & 3,
137 (mp_irq->irqflag >> 2) & 3, mp_irq->srcbus,
138 mp_irq->srcbusirq, mp_irq->dstapic, mp_irq->dstirq);
Yinghai Lu2944e162008-06-01 13:17:38 -0700139}
140
Jaswinder Singh Rajputa6830272009-03-18 20:42:28 +0530141#else /* CONFIG_X86_IO_APIC */
142static inline void __init MP_bus_info(struct mpc_bus *m) {}
143static inline void __init MP_ioapic_info(struct mpc_ioapic *m) {}
Jaswinder Singh Rajputa6830272009-03-18 20:42:28 +0530144#endif /* CONFIG_X86_IO_APIC */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700145
Jaswinder Singh Rajput8fb29522009-01-03 15:51:54 +0530146static void __init MP_lintsrc_info(struct mpc_lintsrc *m)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700147{
Jiang Liub1bfd5e2014-06-09 16:19:31 +0800148 apic_printk(APIC_VERBOSE,
149 "Lint: type %d, pol %d, trig %d, bus %02x, IRQ %02x, APIC ID %x, APIC LINT %02x\n",
Jaswinder Singh Rajputb5ced7c2009-01-04 21:55:53 +0530150 m->irqtype, m->irqflag & 3, (m->irqflag >> 2) & 3, m->srcbusid,
151 m->srcbusirq, m->destapic, m->destapiclint);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700152}
153
Linus Torvalds1da177e2005-04-16 15:20:36 -0700154/*
155 * Read/parse the MPC
156 */
Jaswinder Singh Rajputf29521e2009-01-03 15:46:57 +0530157static int __init smp_check_mpc(struct mpc_table *mpc, char *oem, char *str)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700158{
Linus Torvalds1da177e2005-04-16 15:20:36 -0700159
Jaswinder Singh Rajput6c65da52009-01-04 22:22:56 +0530160 if (memcmp(mpc->signature, MPC_SIGNATURE, 4)) {
Jiang Liub1bfd5e2014-06-09 16:19:31 +0800161 pr_err("MPTABLE: bad signature [%c%c%c%c]!\n",
Jaswinder Singh Rajput6c65da52009-01-04 22:22:56 +0530162 mpc->signature[0], mpc->signature[1],
163 mpc->signature[2], mpc->signature[3]);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700164 return 0;
165 }
Jaswinder Singh Rajput6c65da52009-01-04 22:22:56 +0530166 if (mpf_checksum((unsigned char *)mpc, mpc->length)) {
Jiang Liub1bfd5e2014-06-09 16:19:31 +0800167 pr_err("MPTABLE: checksum error!\n");
Linus Torvalds1da177e2005-04-16 15:20:36 -0700168 return 0;
169 }
Jaswinder Singh Rajput6c65da52009-01-04 22:22:56 +0530170 if (mpc->spec != 0x01 && mpc->spec != 0x04) {
Jiang Liub1bfd5e2014-06-09 16:19:31 +0800171 pr_err("MPTABLE: bad table version (%d)!!\n", mpc->spec);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700172 return 0;
173 }
Jaswinder Singh Rajput6c65da52009-01-04 22:22:56 +0530174 if (!mpc->lapic) {
Jiang Liub1bfd5e2014-06-09 16:19:31 +0800175 pr_err("MPTABLE: null local APIC address!\n");
Linus Torvalds1da177e2005-04-16 15:20:36 -0700176 return 0;
177 }
Jaswinder Singh Rajput6c65da52009-01-04 22:22:56 +0530178 memcpy(oem, mpc->oem, 8);
Alexey Starikovskiy4ef81292008-04-04 23:42:03 +0400179 oem[8] = 0;
Jiang Liub1bfd5e2014-06-09 16:19:31 +0800180 pr_info("MPTABLE: OEM ID: %s\n", oem);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700181
Jaswinder Singh Rajput6c65da52009-01-04 22:22:56 +0530182 memcpy(str, mpc->productid, 12);
Alexey Starikovskiy4ef81292008-04-04 23:42:03 +0400183 str[12] = 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700184
Jiang Liub1bfd5e2014-06-09 16:19:31 +0800185 pr_info("MPTABLE: Product ID: %s\n", str);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700186
Jiang Liub1bfd5e2014-06-09 16:19:31 +0800187 pr_info("MPTABLE: APIC at: 0x%X\n", mpc->lapic);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700188
Yinghai Lu2944e162008-06-01 13:17:38 -0700189 return 1;
190}
191
Jaswinder Singh Rajputa6830272009-03-18 20:42:28 +0530192static void skip_entry(unsigned char **ptr, int *count, int size)
193{
194 *ptr += size;
195 *count += size;
196}
197
Jaswinder Singh Rajput5a5737e2009-03-21 13:28:39 +0530198static void __init smp_dump_mptable(struct mpc_table *mpc, unsigned char *mpt)
199{
Jiang Liub1bfd5e2014-06-09 16:19:31 +0800200 pr_err("Your mptable is wrong, contact your HW vendor!\n");
201 pr_cont("type %x\n", *mpt);
Jaswinder Singh Rajput5a5737e2009-03-21 13:28:39 +0530202 print_hex_dump(KERN_ERR, " ", DUMP_PREFIX_ADDRESS, 16,
203 1, mpc, mpc->length, 1);
204}
205
Thomas Gleixner72302142009-08-20 12:18:32 +0200206void __init default_smp_read_mpc_oem(struct mpc_table *mpc) { }
207
Jaswinder Singh Rajputf29521e2009-01-03 15:46:57 +0530208static int __init smp_read_mpc(struct mpc_table *mpc, unsigned early)
Yinghai Lu2944e162008-06-01 13:17:38 -0700209{
210 char str[16];
211 char oem[10];
212
213 int count = sizeof(*mpc);
214 unsigned char *mpt = ((unsigned char *)mpc) + count;
215
216 if (!smp_check_mpc(mpc, oem, str))
217 return 0;
218
Eric W. Biederman5989cd62010-08-04 13:30:27 -0700219 /* Initialize the lapic mapping */
220 if (!acpi_lapic)
Yinghai Luc0104d32010-12-07 00:55:17 -0800221 register_lapic_address(mpc->lapic);
Eric W. Biederman5989cd62010-08-04 13:30:27 -0700222
Yinghai Luf1157142010-12-07 00:55:29 -0800223 if (early)
224 return 1;
225
Thomas Gleixner72302142009-08-20 12:18:32 +0200226 if (mpc->oemptr)
227 x86_init.mpparse.smp_read_mpc_oem(mpc);
Yinghai Lu64898a82008-07-19 18:01:16 -0700228
Linus Torvalds1da177e2005-04-16 15:20:36 -0700229 /*
Alexey Starikovskiy4ef81292008-04-04 23:42:03 +0400230 * Now process the configuration blocks.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700231 */
Thomas Gleixnerf4848472009-08-20 12:05:01 +0200232 x86_init.mpparse.mpc_record(0);
Yinghai Lu64898a82008-07-19 18:01:16 -0700233
Jaswinder Singh Rajput6c65da52009-01-04 22:22:56 +0530234 while (count < mpc->length) {
Alexey Starikovskiy4ef81292008-04-04 23:42:03 +0400235 switch (*mpt) {
236 case MP_PROCESSOR:
Jaswinder Singh Rajputa6830272009-03-18 20:42:28 +0530237 /* ACPI may have already provided this data */
238 if (!acpi_lapic)
Ingo Molnarc58603e2009-03-19 08:50:35 +0100239 MP_processor_info((struct mpc_cpu *)mpt);
Jaswinder Singh Rajputa6830272009-03-18 20:42:28 +0530240 skip_entry(&mpt, &count, sizeof(struct mpc_cpu));
241 break;
Alexey Starikovskiy4ef81292008-04-04 23:42:03 +0400242 case MP_BUS:
Ingo Molnarc58603e2009-03-19 08:50:35 +0100243 MP_bus_info((struct mpc_bus *)mpt);
Jaswinder Singh Rajputa6830272009-03-18 20:42:28 +0530244 skip_entry(&mpt, &count, sizeof(struct mpc_bus));
245 break;
Alexey Starikovskiy4ef81292008-04-04 23:42:03 +0400246 case MP_IOAPIC:
Ingo Molnarc58603e2009-03-19 08:50:35 +0100247 MP_ioapic_info((struct mpc_ioapic *)mpt);
Jaswinder Singh Rajputa6830272009-03-18 20:42:28 +0530248 skip_entry(&mpt, &count, sizeof(struct mpc_ioapic));
249 break;
Alexey Starikovskiy4ef81292008-04-04 23:42:03 +0400250 case MP_INTSRC:
Feng Tang2d8009b2010-11-19 11:33:35 +0800251 mp_save_irq((struct mpc_intsrc *)mpt);
Jaswinder Singh Rajputa6830272009-03-18 20:42:28 +0530252 skip_entry(&mpt, &count, sizeof(struct mpc_intsrc));
253 break;
Alexey Starikovskiy4ef81292008-04-04 23:42:03 +0400254 case MP_LINTSRC:
Ingo Molnarc58603e2009-03-19 08:50:35 +0100255 MP_lintsrc_info((struct mpc_lintsrc *)mpt);
Jaswinder Singh Rajputa6830272009-03-18 20:42:28 +0530256 skip_entry(&mpt, &count, sizeof(struct mpc_lintsrc));
257 break;
Alexey Starikovskiy4ef81292008-04-04 23:42:03 +0400258 default:
Yinghai Lu711554d2008-04-07 11:36:39 -0700259 /* wrong mptable */
Jaswinder Singh Rajput5a5737e2009-03-21 13:28:39 +0530260 smp_dump_mptable(mpc, mpt);
Jaswinder Singh Rajput6c65da52009-01-04 22:22:56 +0530261 count = mpc->length;
Yinghai Lu711554d2008-04-07 11:36:39 -0700262 break;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700263 }
Thomas Gleixnerf4848472009-08-20 12:05:01 +0200264 x86_init.mpparse.mpc_record(1);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700265 }
Yinghai Lue0da3362008-06-08 18:29:22 -0700266
Linus Torvalds1da177e2005-04-16 15:20:36 -0700267 if (!num_processors)
Jiang Liub1bfd5e2014-06-09 16:19:31 +0800268 pr_err("MPTABLE: no processors registered!\n");
Linus Torvalds1da177e2005-04-16 15:20:36 -0700269 return num_processors;
270}
271
Alexey Starikovskiy61048c62008-04-04 23:41:07 +0400272#ifdef CONFIG_X86_IO_APIC
273
Linus Torvalds1da177e2005-04-16 15:20:36 -0700274static int __init ELCR_trigger(unsigned int irq)
275{
276 unsigned int port;
277
278 port = 0x4d0 + (irq >> 3);
279 return (inb(port) >> (irq & 7)) & 1;
280}
281
282static void __init construct_default_ioirq_mptable(int mpc_default_type)
283{
Jaswinder Singh Rajput540d4e72009-01-03 15:50:52 +0530284 struct mpc_intsrc intsrc;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700285 int i;
286 int ELCR_fallback = 0;
287
Jaswinder Singh Rajpute253b392009-01-04 21:56:44 +0530288 intsrc.type = MP_INTSRC;
289 intsrc.irqflag = 0; /* conforming */
290 intsrc.srcbus = 0;
Suresh Siddhad5371432011-05-18 16:31:37 -0700291 intsrc.dstapic = mpc_ioapic_id(0);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700292
Jaswinder Singh Rajpute253b392009-01-04 21:56:44 +0530293 intsrc.irqtype = mp_INT;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700294
295 /*
296 * If true, we have an ISA/PCI system with no IRQ entries
297 * in the MP table. To prevent the PCI interrupts from being set up
298 * incorrectly, we try to use the ELCR. The sanity check to see if
299 * there is good ELCR data is very simple - IRQ0, 1, 2 and 13 can
300 * never be level sensitive, so we simply see if the ELCR agrees.
301 * If it does, we assume it's valid.
302 */
303 if (mpc_default_type == 5) {
Jiang Liub1bfd5e2014-06-09 16:19:31 +0800304 pr_info("ISA/PCI bus type with no IRQ information... falling back to ELCR\n");
Linus Torvalds1da177e2005-04-16 15:20:36 -0700305
Alexey Starikovskiy62441bf2008-04-04 23:42:34 +0400306 if (ELCR_trigger(0) || ELCR_trigger(1) || ELCR_trigger(2) ||
307 ELCR_trigger(13))
Jiang Liub1bfd5e2014-06-09 16:19:31 +0800308 pr_err("ELCR contains invalid data... not using ELCR\n");
Linus Torvalds1da177e2005-04-16 15:20:36 -0700309 else {
Jiang Liub1bfd5e2014-06-09 16:19:31 +0800310 pr_info("Using ELCR to identify PCI interrupts\n");
Linus Torvalds1da177e2005-04-16 15:20:36 -0700311 ELCR_fallback = 1;
312 }
313 }
314
315 for (i = 0; i < 16; i++) {
316 switch (mpc_default_type) {
317 case 2:
318 if (i == 0 || i == 13)
319 continue; /* IRQ0 & IRQ13 not connected */
320 /* fall through */
321 default:
322 if (i == 2)
323 continue; /* IRQ2 is never connected */
324 }
325
326 if (ELCR_fallback) {
327 /*
328 * If the ELCR indicates a level-sensitive interrupt, we
329 * copy that information over to the MP table in the
330 * irqflag field (level sensitive, active high polarity).
331 */
332 if (ELCR_trigger(i))
Jaswinder Singh Rajpute253b392009-01-04 21:56:44 +0530333 intsrc.irqflag = 13;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700334 else
Jaswinder Singh Rajpute253b392009-01-04 21:56:44 +0530335 intsrc.irqflag = 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700336 }
337
Jaswinder Singh Rajpute253b392009-01-04 21:56:44 +0530338 intsrc.srcbusirq = i;
339 intsrc.dstirq = i ? i : 2; /* IRQ0 to INTIN2 */
Feng Tang2d8009b2010-11-19 11:33:35 +0800340 mp_save_irq(&intsrc);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700341 }
342
Jaswinder Singh Rajpute253b392009-01-04 21:56:44 +0530343 intsrc.irqtype = mp_ExtINT;
344 intsrc.srcbusirq = 0;
345 intsrc.dstirq = 0; /* 8259A to INTIN0 */
Feng Tang2d8009b2010-11-19 11:33:35 +0800346 mp_save_irq(&intsrc);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700347}
348
Alexey Starikovskiy61048c62008-04-04 23:41:07 +0400349
Marcin Slusarz39e00fe2008-08-11 00:09:38 +0200350static void __init construct_ioapic_table(int mpc_default_type)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700351{
Jaswinder Singh Rajput2b85b5f2009-01-03 15:49:57 +0530352 struct mpc_ioapic ioapic;
Jaswinder Singh Rajput00fb8602009-01-03 15:47:32 +0530353 struct mpc_bus bus;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700354
Jaswinder Singh Rajputd4c715f2009-01-04 21:59:26 +0530355 bus.type = MP_BUS;
356 bus.busid = 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700357 switch (mpc_default_type) {
Alexey Starikovskiy4ef81292008-04-04 23:42:03 +0400358 default:
Jiang Liub1bfd5e2014-06-09 16:19:31 +0800359 pr_err("???\nUnknown standard configuration %d\n",
Alexey Starikovskiy4ef81292008-04-04 23:42:03 +0400360 mpc_default_type);
361 /* fall through */
362 case 1:
363 case 5:
Jaswinder Singh Rajputd4c715f2009-01-04 21:59:26 +0530364 memcpy(bus.bustype, "ISA ", 6);
Alexey Starikovskiy4ef81292008-04-04 23:42:03 +0400365 break;
366 case 2:
367 case 6:
368 case 3:
Jaswinder Singh Rajputd4c715f2009-01-04 21:59:26 +0530369 memcpy(bus.bustype, "EISA ", 6);
Alexey Starikovskiy4ef81292008-04-04 23:42:03 +0400370 break;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700371 }
372 MP_bus_info(&bus);
373 if (mpc_default_type > 4) {
Jaswinder Singh Rajputd4c715f2009-01-04 21:59:26 +0530374 bus.busid = 1;
375 memcpy(bus.bustype, "PCI ", 6);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700376 MP_bus_info(&bus);
377 }
378
Cyrill Gorcunov8f3e1df2009-08-24 21:53:36 +0400379 ioapic.type = MP_IOAPIC;
380 ioapic.apicid = 2;
381 ioapic.apicver = mpc_default_type > 4 ? 0x10 : 0x01;
382 ioapic.flags = MPC_APIC_USABLE;
383 ioapic.apicaddr = IO_APIC_DEFAULT_PHYS_BASE;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700384 MP_ioapic_info(&ioapic);
385
386 /*
387 * We set up most of the low 16 IO-APIC pins according to MPS rules.
388 */
389 construct_default_ioirq_mptable(mpc_default_type);
Thomas Gleixner85cc35f2008-05-25 21:21:36 +0200390}
391#else
Marcin Slusarz39e00fe2008-08-11 00:09:38 +0200392static inline void __init construct_ioapic_table(int mpc_default_type) { }
Alexey Starikovskiy61048c62008-04-04 23:41:07 +0400393#endif
Thomas Gleixner85cc35f2008-05-25 21:21:36 +0200394
395static inline void __init construct_default_ISA_mptable(int mpc_default_type)
396{
Jaswinder Singh Rajputf4f21b72009-01-03 15:48:52 +0530397 struct mpc_cpu processor;
Jaswinder Singh Rajput8fb29522009-01-03 15:51:54 +0530398 struct mpc_lintsrc lintsrc;
Thomas Gleixner85cc35f2008-05-25 21:21:36 +0200399 int linttypes[2] = { mp_ExtINT, mp_NMI };
400 int i;
401
402 /*
403 * local APIC has default address
404 */
405 mp_lapic_addr = APIC_DEFAULT_PHYS_BASE;
406
407 /*
408 * 2 CPUs, numbered 0 & 1.
409 */
Jaswinder Singh Rajputc4563822009-01-04 21:58:25 +0530410 processor.type = MP_PROCESSOR;
Thomas Gleixner85cc35f2008-05-25 21:21:36 +0200411 /* Either an integrated APIC or a discrete 82489DX. */
Jaswinder Singh Rajputc4563822009-01-04 21:58:25 +0530412 processor.apicver = mpc_default_type > 4 ? 0x10 : 0x01;
413 processor.cpuflag = CPU_ENABLED;
414 processor.cpufeature = (boot_cpu_data.x86 << 8) |
Thomas Gleixner85cc35f2008-05-25 21:21:36 +0200415 (boot_cpu_data.x86_model << 4) | boot_cpu_data.x86_mask;
Jaswinder Singh Rajputc4563822009-01-04 21:58:25 +0530416 processor.featureflag = boot_cpu_data.x86_capability[0];
417 processor.reserved[0] = 0;
418 processor.reserved[1] = 0;
Thomas Gleixner85cc35f2008-05-25 21:21:36 +0200419 for (i = 0; i < 2; i++) {
Jaswinder Singh Rajputc4563822009-01-04 21:58:25 +0530420 processor.apicid = i;
Thomas Gleixner85cc35f2008-05-25 21:21:36 +0200421 MP_processor_info(&processor);
422 }
423
424 construct_ioapic_table(mpc_default_type);
425
Jaswinder Singh Rajputb5ced7c2009-01-04 21:55:53 +0530426 lintsrc.type = MP_LINTSRC;
427 lintsrc.irqflag = 0; /* conforming */
428 lintsrc.srcbusid = 0;
429 lintsrc.srcbusirq = 0;
430 lintsrc.destapic = MP_APIC_ALL;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700431 for (i = 0; i < 2; i++) {
Jaswinder Singh Rajputb5ced7c2009-01-04 21:55:53 +0530432 lintsrc.irqtype = linttypes[i];
433 lintsrc.destapiclint = i;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700434 MP_lintsrc_info(&lintsrc);
435 }
436}
437
Jaswinder Singh Rajput41401db2009-01-08 15:42:46 +0530438static struct mpf_intel *mpf_found;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700439
Yinghai Lu8d4dd912009-03-04 01:25:21 -0800440static unsigned long __init get_mpc_size(unsigned long physptr)
441{
442 struct mpc_table *mpc;
443 unsigned long size;
444
445 mpc = early_ioremap(physptr, PAGE_SIZE);
446 size = mpc->length;
447 early_iounmap(mpc, PAGE_SIZE);
448 apic_printk(APIC_VERBOSE, " mpc: %lx-%lx\n", physptr, physptr + size);
449
450 return size;
451}
452
Jaswinder Singh Rajput0b3ba0c2009-03-21 13:43:20 +0530453static int __init check_physptr(struct mpf_intel *mpf, unsigned int early)
454{
455 struct mpc_table *mpc;
456 unsigned long size;
457
458 size = get_mpc_size(mpf->physptr);
459 mpc = early_ioremap(mpf->physptr, size);
460 /*
461 * Read the physical hardware table. Anything here will
462 * override the defaults.
463 */
464 if (!smp_read_mpc(mpc, early)) {
465#ifdef CONFIG_X86_LOCAL_APIC
466 smp_found_config = 0;
467#endif
Jiang Liub1bfd5e2014-06-09 16:19:31 +0800468 pr_err("BIOS bug, MP table errors detected!...\n");
469 pr_cont("... disabling SMP support. (tell your hw vendor)\n");
Jaswinder Singh Rajput0b3ba0c2009-03-21 13:43:20 +0530470 early_iounmap(mpc, size);
471 return -1;
472 }
473 early_iounmap(mpc, size);
474
475 if (early)
476 return -1;
477
478#ifdef CONFIG_X86_IO_APIC
479 /*
480 * If there are no explicit MP IRQ entries, then we are
481 * broken. We set up most of the low 16 IO-APIC pins to
482 * ISA defaults and hope it will work.
483 */
484 if (!mp_irq_entries) {
485 struct mpc_bus bus;
486
Jiang Liub1bfd5e2014-06-09 16:19:31 +0800487 pr_err("BIOS bug, no explicit IRQ entries, using default mptable. (tell your hw vendor)\n");
Jaswinder Singh Rajput0b3ba0c2009-03-21 13:43:20 +0530488
489 bus.type = MP_BUS;
490 bus.busid = 0;
491 memcpy(bus.bustype, "ISA ", 6);
492 MP_bus_info(&bus);
493
494 construct_default_ioirq_mptable(0);
495 }
496#endif
497
498 return 0;
499}
500
Linus Torvalds1da177e2005-04-16 15:20:36 -0700501/*
502 * Scan the memory blocks for an SMP configuration block.
503 */
Thomas Gleixnerb3f1b612009-08-20 11:11:52 +0200504void __init default_get_smp_config(unsigned int early)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700505{
Jaswinder Singh Rajput41401db2009-01-08 15:42:46 +0530506 struct mpf_intel *mpf = mpf_found;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700507
Yinghai Lu69b88af2008-12-05 22:45:50 -0800508 if (!mpf)
509 return;
510
511 if (acpi_lapic && early)
512 return;
513
514 /*
515 * MPS doesn't support hyperthreading, aka only have
516 * thread 0 apic id in MPS table
517 */
518 if (acpi_lapic && acpi_ioapic)
519 return;
520
Jiang Liub1bfd5e2014-06-09 16:19:31 +0800521 pr_info("Intel MultiProcessor Specification v1.%d\n",
522 mpf->specification);
Alexey Starikovskiyb3e24162008-05-23 01:54:44 +0400523#if defined(CONFIG_X86_LOCAL_APIC) && defined(CONFIG_X86_32)
Jaswinder Singh Rajput1eb1b3b2009-01-08 15:43:26 +0530524 if (mpf->feature2 & (1 << 7)) {
Jiang Liub1bfd5e2014-06-09 16:19:31 +0800525 pr_info(" IMCR and PIC compatibility mode.\n");
Linus Torvalds1da177e2005-04-16 15:20:36 -0700526 pic_mode = 1;
527 } else {
Jiang Liub1bfd5e2014-06-09 16:19:31 +0800528 pr_info(" Virtual Wire compatibility mode.\n");
Linus Torvalds1da177e2005-04-16 15:20:36 -0700529 pic_mode = 0;
530 }
Alexey Starikovskiy4421b1c2008-04-04 23:42:40 +0400531#endif
Linus Torvalds1da177e2005-04-16 15:20:36 -0700532 /*
533 * Now see if we need to read further.
534 */
Jaswinder Singh Rajput1eb1b3b2009-01-08 15:43:26 +0530535 if (mpf->feature1 != 0) {
Alexey Starikovskiy888032c2008-04-04 23:42:09 +0400536 if (early) {
537 /*
538 * local APIC has default address
539 */
540 mp_lapic_addr = APIC_DEFAULT_PHYS_BASE;
541 return;
542 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700543
Jiang Liub1bfd5e2014-06-09 16:19:31 +0800544 pr_info("Default MP configuration #%d\n", mpf->feature1);
Jaswinder Singh Rajput1eb1b3b2009-01-08 15:43:26 +0530545 construct_default_ISA_mptable(mpf->feature1);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700546
Jaswinder Singh Rajput1eb1b3b2009-01-08 15:43:26 +0530547 } else if (mpf->physptr) {
Jaswinder Singh Rajput0b3ba0c2009-03-21 13:43:20 +0530548 if (check_physptr(mpf, early))
Linus Torvalds1da177e2005-04-16 15:20:36 -0700549 return;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700550 } else
551 BUG();
552
Alexey Starikovskiy888032c2008-04-04 23:42:09 +0400553 if (!early)
Jiang Liub1bfd5e2014-06-09 16:19:31 +0800554 pr_info("Processors: %d\n", num_processors);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700555 /*
556 * Only use the first configuration found.
557 */
558}
559
Yinghai Lub24c2a92009-11-24 02:48:18 -0800560static void __init smp_reserve_memory(struct mpf_intel *mpf)
Jaswinder Singh Rajputa6830272009-03-18 20:42:28 +0530561{
Tejun Heo24aa0782011-07-12 11:16:06 +0200562 memblock_reserve(mpf->physptr, get_mpc_size(mpf->physptr));
Jaswinder Singh Rajputa6830272009-03-18 20:42:28 +0530563}
564
Yinghai Lub24c2a92009-11-24 02:48:18 -0800565static int __init smp_scan_config(unsigned long base, unsigned long length)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700566{
Alexey Starikovskiy92fd4b72008-04-04 23:42:46 +0400567 unsigned int *bp = phys_to_virt(base);
Jaswinder Singh Rajput41401db2009-01-08 15:42:46 +0530568 struct mpf_intel *mpf;
Yinghai Lub24c2a92009-11-24 02:48:18 -0800569 unsigned long mem;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700570
Bjorn Helgaas365811d2012-05-29 15:06:29 -0700571 apic_printk(APIC_VERBOSE, "Scan for SMP in [mem %#010lx-%#010lx]\n",
572 base, base + length - 1);
Akinobu Mita5d47a272008-04-19 23:55:11 +0900573 BUILD_BUG_ON(sizeof(*mpf) != 16);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700574
575 while (length > 0) {
Jaswinder Singh Rajput41401db2009-01-08 15:42:46 +0530576 mpf = (struct mpf_intel *)bp;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700577 if ((*bp == SMP_MAGIC_IDENT) &&
Jaswinder Singh Rajput1eb1b3b2009-01-08 15:43:26 +0530578 (mpf->length == 1) &&
Alexey Starikovskiy4ef81292008-04-04 23:42:03 +0400579 !mpf_checksum((unsigned char *)bp, 16) &&
Jaswinder Singh Rajput1eb1b3b2009-01-08 15:43:26 +0530580 ((mpf->specification == 1)
581 || (mpf->specification == 4))) {
Alexey Starikovskiybab4b272008-05-19 19:47:03 +0400582#ifdef CONFIG_X86_LOCAL_APIC
Linus Torvalds1da177e2005-04-16 15:20:36 -0700583 smp_found_config = 1;
Alexey Starikovskiybab4b272008-05-19 19:47:03 +0400584#endif
Alexey Starikovskiy92fd4b72008-04-04 23:42:46 +0400585 mpf_found = mpf;
Yinghai Lub1f006b2008-06-09 18:11:36 -0700586
Jiang Liub1bfd5e2014-06-09 16:19:31 +0800587 pr_info("found SMP MP-table at [mem %#010llx-%#010llx] mapped at [%p]\n",
588 (unsigned long long) virt_to_phys(mpf),
589 (unsigned long long) virt_to_phys(mpf) +
590 sizeof(*mpf) - 1, mpf);
Yinghai Lub1f006b2008-06-09 18:11:36 -0700591
Yinghai Lub24c2a92009-11-24 02:48:18 -0800592 mem = virt_to_phys(mpf);
Tejun Heo24aa0782011-07-12 11:16:06 +0200593 memblock_reserve(mem, sizeof(*mpf));
Jaswinder Singh Rajputa6830272009-03-18 20:42:28 +0530594 if (mpf->physptr)
Yinghai Lub24c2a92009-11-24 02:48:18 -0800595 smp_reserve_memory(mpf);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700596
Yinghai Lud2dbf342008-06-13 02:00:56 -0700597 return 1;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700598 }
599 bp += 4;
600 length -= 16;
601 }
602 return 0;
603}
604
Yinghai Lub24c2a92009-11-24 02:48:18 -0800605void __init default_find_smp_config(void)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700606{
607 unsigned int address;
608
609 /*
610 * FIXME: Linux assumes you have 640K of base ram..
611 * this continues the error...
612 *
613 * 1) Scan the bottom 1K for a signature
614 * 2) Scan the top 1K of base RAM
615 * 3) Scan the 64K of bios
616 */
Yinghai Lub24c2a92009-11-24 02:48:18 -0800617 if (smp_scan_config(0x0, 0x400) ||
618 smp_scan_config(639 * 0x400, 0x400) ||
619 smp_scan_config(0xF0000, 0x10000))
Linus Torvalds1da177e2005-04-16 15:20:36 -0700620 return;
621 /*
622 * If it is an SMP machine we should know now, unless the
Paul Gortmakerbb8187d2012-05-17 19:06:13 -0400623 * configuration is in an EISA bus machine with an
Linus Torvalds1da177e2005-04-16 15:20:36 -0700624 * extended bios data area.
625 *
626 * there is a real-mode segmented pointer pointing to the
627 * 4K EBDA area at 0x40E, calculate and scan it here.
628 *
629 * NOTE! There are Linux loaders that will corrupt the EBDA
630 * area, and as such this kind of SMP config may be less
631 * trustworthy, simply because the SMP table may have been
632 * stomped on during early boot. These loaders are buggy and
633 * should be fixed.
634 *
635 * MP1.4 SPEC states to only scan first 1K of 4K EBDA.
636 */
637
638 address = get_bios_ebda();
639 if (address)
Yinghai Lub24c2a92009-11-24 02:48:18 -0800640 smp_scan_config(address, 0x400);
Alexey Starikovskiy888032c2008-04-04 23:42:09 +0400641}
642
Yinghai Lu2944e162008-06-01 13:17:38 -0700643#ifdef CONFIG_X86_IO_APIC
644static u8 __initdata irq_used[MAX_IRQ_SOURCES];
645
Jaswinder Singh Rajput540d4e72009-01-03 15:50:52 +0530646static int __init get_MP_intsrc_index(struct mpc_intsrc *m)
Yinghai Lu2944e162008-06-01 13:17:38 -0700647{
648 int i;
649
Jaswinder Singh Rajpute253b392009-01-04 21:56:44 +0530650 if (m->irqtype != mp_INT)
Yinghai Lu2944e162008-06-01 13:17:38 -0700651 return 0;
652
Jaswinder Singh Rajpute253b392009-01-04 21:56:44 +0530653 if (m->irqflag != 0x0f)
Yinghai Lu2944e162008-06-01 13:17:38 -0700654 return 0;
655
656 /* not legacy */
657
658 for (i = 0; i < mp_irq_entries; i++) {
Jaswinder Singh Rajputc2c21742009-01-12 17:47:22 +0530659 if (mp_irqs[i].irqtype != mp_INT)
Yinghai Lu2944e162008-06-01 13:17:38 -0700660 continue;
661
Jaswinder Singh Rajputc2c21742009-01-12 17:47:22 +0530662 if (mp_irqs[i].irqflag != 0x0f)
Yinghai Lu2944e162008-06-01 13:17:38 -0700663 continue;
664
Jaswinder Singh Rajputc2c21742009-01-12 17:47:22 +0530665 if (mp_irqs[i].srcbus != m->srcbus)
Yinghai Lu2944e162008-06-01 13:17:38 -0700666 continue;
Jaswinder Singh Rajputc2c21742009-01-12 17:47:22 +0530667 if (mp_irqs[i].srcbusirq != m->srcbusirq)
Yinghai Lu2944e162008-06-01 13:17:38 -0700668 continue;
669 if (irq_used[i]) {
670 /* already claimed */
671 return -2;
672 }
673 irq_used[i] = 1;
674 return i;
675 }
676
677 /* not found */
678 return -1;
679}
680
681#define SPARE_SLOT_NUM 20
682
Jaswinder Singh Rajput540d4e72009-01-03 15:50:52 +0530683static struct mpc_intsrc __initdata *m_spare[SPARE_SLOT_NUM];
Jaswinder Singh Rajputa6830272009-03-18 20:42:28 +0530684
Rakib Mullick57592222009-04-11 09:04:59 +0600685static void __init check_irq_src(struct mpc_intsrc *m, int *nr_m_spare)
Jaswinder Singh Rajputa6830272009-03-18 20:42:28 +0530686{
687 int i;
688
689 apic_printk(APIC_VERBOSE, "OLD ");
Feng Tang0e3fa132010-12-08 15:18:57 +0800690 print_mp_irq_info(m);
Jaswinder Singh Rajputa6830272009-03-18 20:42:28 +0530691
692 i = get_MP_intsrc_index(m);
693 if (i > 0) {
Feng Tang0e3fa132010-12-08 15:18:57 +0800694 memcpy(m, &mp_irqs[i], sizeof(*m));
Jaswinder Singh Rajputa6830272009-03-18 20:42:28 +0530695 apic_printk(APIC_VERBOSE, "NEW ");
696 print_mp_irq_info(&mp_irqs[i]);
697 return;
698 }
699 if (!i) {
700 /* legacy, do nothing */
701 return;
702 }
703 if (*nr_m_spare < SPARE_SLOT_NUM) {
704 /*
705 * not found (-1), or duplicated (-2) are invalid entries,
706 * we need to use the slot later
707 */
708 m_spare[*nr_m_spare] = m;
709 *nr_m_spare += 1;
710 }
711}
Jaswinder Singh Rajputa6830272009-03-18 20:42:28 +0530712
Rakib Mullick64d21fc2011-04-02 13:17:48 +0600713static int __init
Yinghai Luee214552009-05-06 10:07:07 -0700714check_slot(unsigned long mpc_new_phys, unsigned long mpc_new_length, int count)
Jaswinder Singh Rajputa6830272009-03-18 20:42:28 +0530715{
Yinghai Luee214552009-05-06 10:07:07 -0700716 if (!mpc_new_phys || count <= mpc_new_length) {
717 WARN(1, "update_mptable: No spare slots (length: %x)\n", count);
718 return -1;
Jaswinder Singh Rajputa6830272009-03-18 20:42:28 +0530719 }
720
Rakib Mullick9f1f1bf2011-03-23 21:31:40 +0600721 return 0;
Jaswinder Singh Rajputa6830272009-03-18 20:42:28 +0530722}
Rakib Mullickcbb84c42011-03-22 15:24:54 +0600723#else /* CONFIG_X86_IO_APIC */
724static
725inline void __init check_irq_src(struct mpc_intsrc *m, int *nr_m_spare) {}
726#endif /* CONFIG_X86_IO_APIC */
Yinghai Lu2944e162008-06-01 13:17:38 -0700727
Jaswinder Singh Rajputf29521e2009-01-03 15:46:57 +0530728static int __init replace_intsrc_all(struct mpc_table *mpc,
Yinghai Lu2944e162008-06-01 13:17:38 -0700729 unsigned long mpc_new_phys,
730 unsigned long mpc_new_length)
731{
732#ifdef CONFIG_X86_IO_APIC
733 int i;
Yinghai Lu2944e162008-06-01 13:17:38 -0700734#endif
Yinghai Lu2944e162008-06-01 13:17:38 -0700735 int count = sizeof(*mpc);
Jaswinder Singh Rajputa6830272009-03-18 20:42:28 +0530736 int nr_m_spare = 0;
Yinghai Lu2944e162008-06-01 13:17:38 -0700737 unsigned char *mpt = ((unsigned char *)mpc) + count;
738
Jiang Liub1bfd5e2014-06-09 16:19:31 +0800739 pr_info("mpc_length %x\n", mpc->length);
Jaswinder Singh Rajput6c65da52009-01-04 22:22:56 +0530740 while (count < mpc->length) {
Yinghai Lu2944e162008-06-01 13:17:38 -0700741 switch (*mpt) {
742 case MP_PROCESSOR:
Jaswinder Singh Rajputa6830272009-03-18 20:42:28 +0530743 skip_entry(&mpt, &count, sizeof(struct mpc_cpu));
744 break;
Yinghai Lu2944e162008-06-01 13:17:38 -0700745 case MP_BUS:
Jaswinder Singh Rajputa6830272009-03-18 20:42:28 +0530746 skip_entry(&mpt, &count, sizeof(struct mpc_bus));
747 break;
Yinghai Lu2944e162008-06-01 13:17:38 -0700748 case MP_IOAPIC:
Jaswinder Singh Rajputa6830272009-03-18 20:42:28 +0530749 skip_entry(&mpt, &count, sizeof(struct mpc_ioapic));
750 break;
Yinghai Lu2944e162008-06-01 13:17:38 -0700751 case MP_INTSRC:
Ingo Molnarc58603e2009-03-19 08:50:35 +0100752 check_irq_src((struct mpc_intsrc *)mpt, &nr_m_spare);
Jaswinder Singh Rajputa6830272009-03-18 20:42:28 +0530753 skip_entry(&mpt, &count, sizeof(struct mpc_intsrc));
754 break;
Yinghai Lu2944e162008-06-01 13:17:38 -0700755 case MP_LINTSRC:
Jaswinder Singh Rajputa6830272009-03-18 20:42:28 +0530756 skip_entry(&mpt, &count, sizeof(struct mpc_lintsrc));
757 break;
Yinghai Lu2944e162008-06-01 13:17:38 -0700758 default:
759 /* wrong mptable */
Jaswinder Singh Rajput5a5737e2009-03-21 13:28:39 +0530760 smp_dump_mptable(mpc, mpt);
Yinghai Lu2944e162008-06-01 13:17:38 -0700761 goto out;
762 }
763 }
764
765#ifdef CONFIG_X86_IO_APIC
766 for (i = 0; i < mp_irq_entries; i++) {
767 if (irq_used[i])
768 continue;
769
Jaswinder Singh Rajputc2c21742009-01-12 17:47:22 +0530770 if (mp_irqs[i].irqtype != mp_INT)
Yinghai Lu2944e162008-06-01 13:17:38 -0700771 continue;
772
Jaswinder Singh Rajputc2c21742009-01-12 17:47:22 +0530773 if (mp_irqs[i].irqflag != 0x0f)
Yinghai Lu2944e162008-06-01 13:17:38 -0700774 continue;
775
776 if (nr_m_spare > 0) {
Jan Beulich82034d62009-03-12 12:57:10 +0000777 apic_printk(APIC_VERBOSE, "*NEW* found\n");
Yinghai Lu2944e162008-06-01 13:17:38 -0700778 nr_m_spare--;
Feng Tang0e3fa132010-12-08 15:18:57 +0800779 memcpy(m_spare[nr_m_spare], &mp_irqs[i], sizeof(mp_irqs[i]));
Yinghai Lu2944e162008-06-01 13:17:38 -0700780 m_spare[nr_m_spare] = NULL;
781 } else {
Jaswinder Singh Rajput540d4e72009-01-03 15:50:52 +0530782 struct mpc_intsrc *m = (struct mpc_intsrc *)mpt;
783 count += sizeof(struct mpc_intsrc);
Yinghai Luee214552009-05-06 10:07:07 -0700784 if (check_slot(mpc_new_phys, mpc_new_length, count) < 0)
Jaswinder Singh Rajputa6830272009-03-18 20:42:28 +0530785 goto out;
Feng Tang0e3fa132010-12-08 15:18:57 +0800786 memcpy(m, &mp_irqs[i], sizeof(*m));
Jaswinder Singh Rajput6c65da52009-01-04 22:22:56 +0530787 mpc->length = count;
Jaswinder Singh Rajput540d4e72009-01-03 15:50:52 +0530788 mpt += sizeof(struct mpc_intsrc);
Yinghai Lu2944e162008-06-01 13:17:38 -0700789 }
790 print_mp_irq_info(&mp_irqs[i]);
791 }
792#endif
793out:
794 /* update checksum */
Jaswinder Singh Rajput6c65da52009-01-04 22:22:56 +0530795 mpc->checksum = 0;
796 mpc->checksum -= mpf_checksum((unsigned char *)mpc, mpc->length);
Yinghai Lu2944e162008-06-01 13:17:38 -0700797
798 return 0;
799}
800
Yinghai Luf1bdb522009-05-15 13:05:16 -0700801int enable_update_mptable;
Yinghai Lufcfa1462008-06-18 17:29:31 -0700802
Yinghai Lu2944e162008-06-01 13:17:38 -0700803static int __init update_mptable_setup(char *str)
804{
805 enable_update_mptable = 1;
Yinghai Lu629e15d2009-05-15 13:05:16 -0700806#ifdef CONFIG_PCI
807 pci_routeirq = 1;
808#endif
Yinghai Lu2944e162008-06-01 13:17:38 -0700809 return 0;
810}
811early_param("update_mptable", update_mptable_setup);
812
813static unsigned long __initdata mpc_new_phys;
814static unsigned long mpc_new_length __initdata = 4096;
815
816/* alloc_mptable or alloc_mptable=4k */
817static int __initdata alloc_mptable;
818static int __init parse_alloc_mptable_opt(char *p)
819{
820 enable_update_mptable = 1;
Yinghai Lu629e15d2009-05-15 13:05:16 -0700821#ifdef CONFIG_PCI
822 pci_routeirq = 1;
823#endif
Yinghai Lu2944e162008-06-01 13:17:38 -0700824 alloc_mptable = 1;
825 if (!p)
826 return 0;
827 mpc_new_length = memparse(p, &p);
828 return 0;
829}
830early_param("alloc_mptable", parse_alloc_mptable_opt);
831
832void __init early_reserve_e820_mpc_new(void)
833{
Tejun Heoab5d1402011-07-12 11:15:58 +0200834 if (enable_update_mptable && alloc_mptable)
835 mpc_new_phys = early_reserve_e820(mpc_new_length, 4);
Yinghai Lu2944e162008-06-01 13:17:38 -0700836}
837
838static int __init update_mp_table(void)
839{
840 char str[16];
841 char oem[10];
Jaswinder Singh Rajput41401db2009-01-08 15:42:46 +0530842 struct mpf_intel *mpf;
Jaswinder Singh Rajputf29521e2009-01-03 15:46:57 +0530843 struct mpc_table *mpc, *mpc_new;
Yinghai Lu2944e162008-06-01 13:17:38 -0700844
845 if (!enable_update_mptable)
846 return 0;
847
848 mpf = mpf_found;
849 if (!mpf)
850 return 0;
851
852 /*
853 * Now see if we need to go further.
854 */
Jaswinder Singh Rajput1eb1b3b2009-01-08 15:43:26 +0530855 if (mpf->feature1 != 0)
Yinghai Lu2944e162008-06-01 13:17:38 -0700856 return 0;
857
Jaswinder Singh Rajput1eb1b3b2009-01-08 15:43:26 +0530858 if (!mpf->physptr)
Yinghai Lu2944e162008-06-01 13:17:38 -0700859 return 0;
860
Jaswinder Singh Rajput1eb1b3b2009-01-08 15:43:26 +0530861 mpc = phys_to_virt(mpf->physptr);
Yinghai Lu2944e162008-06-01 13:17:38 -0700862
863 if (!smp_check_mpc(mpc, oem, str))
864 return 0;
865
Jiang Liub1bfd5e2014-06-09 16:19:31 +0800866 pr_info("mpf: %llx\n", (u64)virt_to_phys(mpf));
867 pr_info("physptr: %x\n", mpf->physptr);
Yinghai Lu2944e162008-06-01 13:17:38 -0700868
Jaswinder Singh Rajput6c65da52009-01-04 22:22:56 +0530869 if (mpc_new_phys && mpc->length > mpc_new_length) {
Yinghai Lu2944e162008-06-01 13:17:38 -0700870 mpc_new_phys = 0;
Jiang Liub1bfd5e2014-06-09 16:19:31 +0800871 pr_info("mpc_new_length is %ld, please use alloc_mptable=8k\n",
872 mpc_new_length);
Yinghai Lu2944e162008-06-01 13:17:38 -0700873 }
874
875 if (!mpc_new_phys) {
876 unsigned char old, new;
Lucas De Marchi0d2eb442011-03-17 16:24:16 -0300877 /* check if we can change the position */
Jaswinder Singh Rajput6c65da52009-01-04 22:22:56 +0530878 mpc->checksum = 0;
879 old = mpf_checksum((unsigned char *)mpc, mpc->length);
880 mpc->checksum = 0xff;
881 new = mpf_checksum((unsigned char *)mpc, mpc->length);
Yinghai Lu2944e162008-06-01 13:17:38 -0700882 if (old == new) {
Jiang Liub1bfd5e2014-06-09 16:19:31 +0800883 pr_info("mpc is readonly, please try alloc_mptable instead\n");
Yinghai Lu2944e162008-06-01 13:17:38 -0700884 return 0;
885 }
Jiang Liub1bfd5e2014-06-09 16:19:31 +0800886 pr_info("use in-position replacing\n");
Yinghai Lu2944e162008-06-01 13:17:38 -0700887 } else {
Jaswinder Singh Rajput1eb1b3b2009-01-08 15:43:26 +0530888 mpf->physptr = mpc_new_phys;
Yinghai Lu2944e162008-06-01 13:17:38 -0700889 mpc_new = phys_to_virt(mpc_new_phys);
Jaswinder Singh Rajput6c65da52009-01-04 22:22:56 +0530890 memcpy(mpc_new, mpc, mpc->length);
Yinghai Lu2944e162008-06-01 13:17:38 -0700891 mpc = mpc_new;
892 /* check if we can modify that */
Jaswinder Singh Rajput1eb1b3b2009-01-08 15:43:26 +0530893 if (mpc_new_phys - mpf->physptr) {
Jaswinder Singh Rajput41401db2009-01-08 15:42:46 +0530894 struct mpf_intel *mpf_new;
Yinghai Lu2944e162008-06-01 13:17:38 -0700895 /* steal 16 bytes from [0, 1k) */
Jiang Liub1bfd5e2014-06-09 16:19:31 +0800896 pr_info("mpf new: %x\n", 0x400 - 16);
Yinghai Lu2944e162008-06-01 13:17:38 -0700897 mpf_new = phys_to_virt(0x400 - 16);
898 memcpy(mpf_new, mpf, 16);
899 mpf = mpf_new;
Jaswinder Singh Rajput1eb1b3b2009-01-08 15:43:26 +0530900 mpf->physptr = mpc_new_phys;
Yinghai Lu2944e162008-06-01 13:17:38 -0700901 }
Jaswinder Singh Rajput1eb1b3b2009-01-08 15:43:26 +0530902 mpf->checksum = 0;
903 mpf->checksum -= mpf_checksum((unsigned char *)mpf, 16);
Jiang Liub1bfd5e2014-06-09 16:19:31 +0800904 pr_info("physptr new: %x\n", mpf->physptr);
Yinghai Lu2944e162008-06-01 13:17:38 -0700905 }
906
907 /*
908 * only replace the one with mp_INT and
909 * MP_IRQ_TRIGGER_LEVEL|MP_IRQ_POLARITY_LOW,
910 * already in mp_irqs , stored by ... and mp_config_acpi_gsi,
911 * may need pci=routeirq for all coverage
912 */
913 replace_intsrc_all(mpc, mpc_new_phys, mpc_new_length);
914
915 return 0;
916}
917
918late_initcall(update_mp_table);