Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1 | /* |
Alexey Starikovskiy | 11113f8 | 2008-05-14 19:02:57 +0400 | [diff] [blame] | 2 | * Intel Multiprocessor Specification 1.1 and 1.4 |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3 | * compliant MP-table parsing routines. |
| 4 | * |
Alan Cox | 87c6fe2 | 2009-01-05 14:08:04 +0000 | [diff] [blame] | 5 | * (c) 1995 Alan Cox, Building #3 <alan@lxorguk.ukuu.org.uk> |
Ingo Molnar | 8f47e16 | 2009-01-31 02:03:42 +0100 | [diff] [blame] | 6 | * (c) 1998, 1999, 2000, 2009 Ingo Molnar <mingo@redhat.com> |
Alexey Starikovskiy | 85bddde | 2008-04-04 23:43:18 +0400 | [diff] [blame] | 7 | * (c) 2008 Alexey Starikovskiy <astarikovskiy@suse.de> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 8 | */ |
| 9 | |
| 10 | #include <linux/mm.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 11 | #include <linux/init.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 12 | #include <linux/delay.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 13 | #include <linux/bootmem.h> |
Yinghai Lu | 72d7c3b | 2010-08-25 13:39:17 -0700 | [diff] [blame] | 14 | #include <linux/memblock.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 15 | #include <linux/kernel_stat.h> |
| 16 | #include <linux/mc146818rtc.h> |
| 17 | #include <linux/bitops.h> |
Alexey Starikovskiy | 85bddde | 2008-04-04 23:43:18 +0400 | [diff] [blame] | 18 | #include <linux/acpi.h> |
| 19 | #include <linux/module.h> |
Jaswinder Singh Rajput | 103ceff | 2009-01-02 23:43:25 +0530 | [diff] [blame] | 20 | #include <linux/smp.h> |
Yinghai Lu | 629e15d | 2009-05-15 13:05:16 -0700 | [diff] [blame] | 21 | #include <linux/pci.h> |
Jiang Liu | 74501ed | 2014-06-09 16:19:55 +0800 | [diff] [blame] | 22 | #include <linux/irqdomain.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 23 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 24 | #include <asm/mtrr.h> |
| 25 | #include <asm/mpspec.h> |
Alexey Starikovskiy | 85bddde | 2008-04-04 23:43:18 +0400 | [diff] [blame] | 26 | #include <asm/pgalloc.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 27 | #include <asm/io_apic.h> |
Alexey Starikovskiy | 85bddde | 2008-04-04 23:43:18 +0400 | [diff] [blame] | 28 | #include <asm/proto.h> |
Alexey Starikovskiy | ce3fe6b | 2008-03-17 22:08:17 +0300 | [diff] [blame] | 29 | #include <asm/bios_ebda.h> |
Yinghai Lu | 2944e16 | 2008-06-01 13:17:38 -0700 | [diff] [blame] | 30 | #include <asm/e820.h> |
Yinghai Lu | 3c9cb6d | 2008-07-19 02:07:25 -0700 | [diff] [blame] | 31 | #include <asm/setup.h> |
Jaswinder Singh Rajput | 4884d8e | 2009-01-11 18:38:55 +0530 | [diff] [blame] | 32 | #include <asm/smp.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 33 | |
Ingo Molnar | 7b6aa33 | 2009-02-17 13:58:15 +0100 | [diff] [blame] | 34 | #include <asm/apic.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 35 | /* |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 36 | * Checksum an MP configuration block. |
| 37 | */ |
| 38 | |
| 39 | static 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 Gleixner | fd6c666 | 2009-08-20 10:41:58 +0200 | [diff] [blame] | 49 | int __init default_mpc_apic_id(struct mpc_cpu *m) |
| 50 | { |
| 51 | return m->apicid; |
| 52 | } |
| 53 | |
Jaswinder Singh Rajput | f4f21b7 | 2009-01-03 15:48:52 +0530 | [diff] [blame] | 54 | static void __init MP_processor_info(struct mpc_cpu *m) |
Alexey Starikovskiy | c853c67 | 2008-03-27 23:54:13 +0300 | [diff] [blame] | 55 | { |
| 56 | int apicid; |
Alexey Starikovskiy | 746f224 | 2008-04-04 23:42:15 +0400 | [diff] [blame] | 57 | char *bootup_cpu = ""; |
Alexey Starikovskiy | c853c67 | 2008-03-27 23:54:13 +0300 | [diff] [blame] | 58 | |
Jaswinder Singh Rajput | c456382 | 2009-01-04 21:58:25 +0530 | [diff] [blame] | 59 | if (!(m->cpuflag & CPU_ENABLED)) { |
Glauber Costa | 7b1292e | 2008-03-03 14:12:41 -0300 | [diff] [blame] | 60 | disabled_cpus++; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 61 | return; |
Glauber Costa | 7b1292e | 2008-03-03 14:12:41 -0300 | [diff] [blame] | 62 | } |
Yinghai Lu | 64898a8 | 2008-07-19 18:01:16 -0700 | [diff] [blame] | 63 | |
Thomas Gleixner | fd6c666 | 2009-08-20 10:41:58 +0200 | [diff] [blame] | 64 | apicid = x86_init.mpparse.mpc_apic_id(m); |
Yinghai Lu | 64898a8 | 2008-07-19 18:01:16 -0700 | [diff] [blame] | 65 | |
Jaswinder Singh Rajput | c456382 | 2009-01-04 21:58:25 +0530 | [diff] [blame] | 66 | if (m->cpuflag & CPU_BOOTPROCESSOR) { |
Alexey Starikovskiy | 746f224 | 2008-04-04 23:42:15 +0400 | [diff] [blame] | 67 | bootup_cpu = " (Bootup-CPU)"; |
Jaswinder Singh Rajput | c456382 | 2009-01-04 21:58:25 +0530 | [diff] [blame] | 68 | boot_cpu_physical_apicid = m->apicid; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 69 | } |
| 70 | |
Jiang Liu | b1bfd5e | 2014-06-09 16:19:31 +0800 | [diff] [blame] | 71 | pr_info("Processor #%d%s\n", m->apicid, bootup_cpu); |
Jaswinder Singh Rajput | c456382 | 2009-01-04 21:58:25 +0530 | [diff] [blame] | 72 | generic_processor_info(apicid, m->apicver); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 73 | } |
| 74 | |
Thomas Gleixner | 85cc35f | 2008-05-25 21:21:36 +0200 | [diff] [blame] | 75 | #ifdef CONFIG_X86_IO_APIC |
Thomas Gleixner | 90e1c69 | 2009-08-20 12:34:47 +0200 | [diff] [blame] | 76 | void __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 Rajput | 00fb860 | 2009-01-03 15:47:32 +0530 | [diff] [blame] | 83 | static void __init MP_bus_info(struct mpc_bus *m) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 84 | { |
| 85 | char str[7]; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 86 | |
Thomas Gleixner | 90e1c69 | 2009-08-20 12:34:47 +0200 | [diff] [blame] | 87 | x86_init.mpparse.mpc_oem_bus_info(m, str); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 88 | |
Andi Kleen | 5e4edbb | 2006-09-26 10:52:35 +0200 | [diff] [blame] | 89 | #if MAX_MP_BUSSES < 256 |
Jaswinder Singh Rajput | d4c715f | 2009-01-04 21:59:26 +0530 | [diff] [blame] | 90 | if (m->busid >= MAX_MP_BUSSES) { |
Jiang Liu | b1bfd5e | 2014-06-09 16:19:31 +0800 | [diff] [blame] | 91 | 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 Dunlap | c0ec31a | 2006-04-10 22:53:13 -0700 | [diff] [blame] | 93 | return; |
| 94 | } |
Andi Kleen | 5e4edbb | 2006-09-26 10:52:35 +0200 | [diff] [blame] | 95 | #endif |
Randy Dunlap | c0ec31a | 2006-04-10 22:53:13 -0700 | [diff] [blame] | 96 | |
Bjorn Helgaas | 9e68666 | 2011-09-25 15:29:00 -0600 | [diff] [blame] | 97 | set_bit(m->busid, mp_bus_not_pci); |
Alexey Starikovskiy | f8924e7 | 2008-04-04 23:42:21 +0400 | [diff] [blame] | 98 | if (strncmp(str, BUSTYPE_ISA, sizeof(BUSTYPE_ISA) - 1) == 0) { |
Paul Gortmaker | bb8187d | 2012-05-17 19:06:13 -0400 | [diff] [blame] | 99 | #ifdef CONFIG_EISA |
Jaswinder Singh Rajput | d4c715f | 2009-01-04 21:59:26 +0530 | [diff] [blame] | 100 | mp_bus_id_to_type[m->busid] = MP_BUS_ISA; |
Alexey Starikovskiy | f8924e7 | 2008-04-04 23:42:21 +0400 | [diff] [blame] | 101 | #endif |
| 102 | } else if (strncmp(str, BUSTYPE_PCI, sizeof(BUSTYPE_PCI) - 1) == 0) { |
Thomas Gleixner | 52fdb56 | 2009-08-20 12:45:33 +0200 | [diff] [blame] | 103 | if (x86_init.mpparse.mpc_oem_pci_bus) |
| 104 | x86_init.mpparse.mpc_oem_pci_bus(m); |
Yinghai Lu | 64898a8 | 2008-07-19 18:01:16 -0700 | [diff] [blame] | 105 | |
Jaswinder Singh Rajput | d4c715f | 2009-01-04 21:59:26 +0530 | [diff] [blame] | 106 | clear_bit(m->busid, mp_bus_not_pci); |
Paul Gortmaker | bb8187d | 2012-05-17 19:06:13 -0400 | [diff] [blame] | 107 | #ifdef CONFIG_EISA |
Jaswinder Singh Rajput | d4c715f | 2009-01-04 21:59:26 +0530 | [diff] [blame] | 108 | mp_bus_id_to_type[m->busid] = MP_BUS_PCI; |
Alexey Starikovskiy | 4ef8129 | 2008-04-04 23:42:03 +0400 | [diff] [blame] | 109 | } else if (strncmp(str, BUSTYPE_EISA, sizeof(BUSTYPE_EISA) - 1) == 0) { |
Jaswinder Singh Rajput | d4c715f | 2009-01-04 21:59:26 +0530 | [diff] [blame] | 110 | mp_bus_id_to_type[m->busid] = MP_BUS_EISA; |
Alexey Starikovskiy | c0a282c | 2008-03-20 14:55:02 +0300 | [diff] [blame] | 111 | #endif |
Alexey Starikovskiy | f8924e7 | 2008-04-04 23:42:21 +0400 | [diff] [blame] | 112 | } else |
Jiang Liu | b1bfd5e | 2014-06-09 16:19:31 +0800 | [diff] [blame] | 113 | pr_warn("Unknown bustype %s - ignoring\n", str); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 114 | } |
Alexey Starikovskiy | 61048c6 | 2008-04-04 23:41:07 +0400 | [diff] [blame] | 115 | |
Jiang Liu | 9506063 | 2014-06-09 16:20:00 +0800 | [diff] [blame] | 116 | static struct irq_domain_ops mp_ioapic_irqdomain_ops = { |
| 117 | .map = mp_irqdomain_map, |
Jiang Liu | c03b3b0 | 2014-06-09 16:20:08 +0800 | [diff] [blame] | 118 | .unmap = mp_irqdomain_unmap, |
Jiang Liu | 9506063 | 2014-06-09 16:20:00 +0800 | [diff] [blame] | 119 | }; |
Jiang Liu | 74501ed | 2014-06-09 16:19:55 +0800 | [diff] [blame] | 120 | |
Jaswinder Singh Rajput | 2b85b5f | 2009-01-03 15:49:57 +0530 | [diff] [blame] | 121 | static void __init MP_ioapic_info(struct mpc_ioapic *m) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 122 | { |
Jiang Liu | 74501ed | 2014-06-09 16:19:55 +0800 | [diff] [blame] | 123 | struct ioapic_domain_cfg cfg = { |
| 124 | .type = IOAPIC_DOMAIN_LEGACY, |
| 125 | .ops = &mp_ioapic_irqdomain_ops, |
| 126 | }; |
| 127 | |
Feng Tang | 0e3fa13 | 2010-12-08 15:18:57 +0800 | [diff] [blame] | 128 | if (m->flags & MPC_APIC_USABLE) |
Jiang Liu | 74501ed | 2014-06-09 16:19:55 +0800 | [diff] [blame] | 129 | mp_register_ioapic(m->apicid, m->apicaddr, gsi_top, &cfg); |
Yinghai Lu | 2944e16 | 2008-06-01 13:17:38 -0700 | [diff] [blame] | 130 | } |
| 131 | |
Jaswinder Singh Rajput | c2c2174 | 2009-01-12 17:47:22 +0530 | [diff] [blame] | 132 | static void __init print_mp_irq_info(struct mpc_intsrc *mp_irq) |
Yinghai Lu | 2944e16 | 2008-06-01 13:17:38 -0700 | [diff] [blame] | 133 | { |
Jiang Liu | b1bfd5e | 2014-06-09 16:19:31 +0800 | [diff] [blame] | 134 | 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 Rajput | c2c2174 | 2009-01-12 17:47:22 +0530 | [diff] [blame] | 136 | 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 Lu | 2944e16 | 2008-06-01 13:17:38 -0700 | [diff] [blame] | 139 | } |
| 140 | |
Jaswinder Singh Rajput | a683027 | 2009-03-18 20:42:28 +0530 | [diff] [blame] | 141 | #else /* CONFIG_X86_IO_APIC */ |
| 142 | static inline void __init MP_bus_info(struct mpc_bus *m) {} |
| 143 | static inline void __init MP_ioapic_info(struct mpc_ioapic *m) {} |
Jaswinder Singh Rajput | a683027 | 2009-03-18 20:42:28 +0530 | [diff] [blame] | 144 | #endif /* CONFIG_X86_IO_APIC */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 145 | |
Jaswinder Singh Rajput | 8fb2952 | 2009-01-03 15:51:54 +0530 | [diff] [blame] | 146 | static void __init MP_lintsrc_info(struct mpc_lintsrc *m) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 147 | { |
Jiang Liu | b1bfd5e | 2014-06-09 16:19:31 +0800 | [diff] [blame] | 148 | 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 Rajput | b5ced7c | 2009-01-04 21:55:53 +0530 | [diff] [blame] | 150 | m->irqtype, m->irqflag & 3, (m->irqflag >> 2) & 3, m->srcbusid, |
| 151 | m->srcbusirq, m->destapic, m->destapiclint); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 152 | } |
| 153 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 154 | /* |
| 155 | * Read/parse the MPC |
| 156 | */ |
Jaswinder Singh Rajput | f29521e | 2009-01-03 15:46:57 +0530 | [diff] [blame] | 157 | static int __init smp_check_mpc(struct mpc_table *mpc, char *oem, char *str) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 158 | { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 159 | |
Jaswinder Singh Rajput | 6c65da5 | 2009-01-04 22:22:56 +0530 | [diff] [blame] | 160 | if (memcmp(mpc->signature, MPC_SIGNATURE, 4)) { |
Jiang Liu | b1bfd5e | 2014-06-09 16:19:31 +0800 | [diff] [blame] | 161 | pr_err("MPTABLE: bad signature [%c%c%c%c]!\n", |
Jaswinder Singh Rajput | 6c65da5 | 2009-01-04 22:22:56 +0530 | [diff] [blame] | 162 | mpc->signature[0], mpc->signature[1], |
| 163 | mpc->signature[2], mpc->signature[3]); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 164 | return 0; |
| 165 | } |
Jaswinder Singh Rajput | 6c65da5 | 2009-01-04 22:22:56 +0530 | [diff] [blame] | 166 | if (mpf_checksum((unsigned char *)mpc, mpc->length)) { |
Jiang Liu | b1bfd5e | 2014-06-09 16:19:31 +0800 | [diff] [blame] | 167 | pr_err("MPTABLE: checksum error!\n"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 168 | return 0; |
| 169 | } |
Jaswinder Singh Rajput | 6c65da5 | 2009-01-04 22:22:56 +0530 | [diff] [blame] | 170 | if (mpc->spec != 0x01 && mpc->spec != 0x04) { |
Jiang Liu | b1bfd5e | 2014-06-09 16:19:31 +0800 | [diff] [blame] | 171 | pr_err("MPTABLE: bad table version (%d)!!\n", mpc->spec); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 172 | return 0; |
| 173 | } |
Jaswinder Singh Rajput | 6c65da5 | 2009-01-04 22:22:56 +0530 | [diff] [blame] | 174 | if (!mpc->lapic) { |
Jiang Liu | b1bfd5e | 2014-06-09 16:19:31 +0800 | [diff] [blame] | 175 | pr_err("MPTABLE: null local APIC address!\n"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 176 | return 0; |
| 177 | } |
Jaswinder Singh Rajput | 6c65da5 | 2009-01-04 22:22:56 +0530 | [diff] [blame] | 178 | memcpy(oem, mpc->oem, 8); |
Alexey Starikovskiy | 4ef8129 | 2008-04-04 23:42:03 +0400 | [diff] [blame] | 179 | oem[8] = 0; |
Jiang Liu | b1bfd5e | 2014-06-09 16:19:31 +0800 | [diff] [blame] | 180 | pr_info("MPTABLE: OEM ID: %s\n", oem); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 181 | |
Jaswinder Singh Rajput | 6c65da5 | 2009-01-04 22:22:56 +0530 | [diff] [blame] | 182 | memcpy(str, mpc->productid, 12); |
Alexey Starikovskiy | 4ef8129 | 2008-04-04 23:42:03 +0400 | [diff] [blame] | 183 | str[12] = 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 184 | |
Jiang Liu | b1bfd5e | 2014-06-09 16:19:31 +0800 | [diff] [blame] | 185 | pr_info("MPTABLE: Product ID: %s\n", str); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 186 | |
Jiang Liu | b1bfd5e | 2014-06-09 16:19:31 +0800 | [diff] [blame] | 187 | pr_info("MPTABLE: APIC at: 0x%X\n", mpc->lapic); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 188 | |
Yinghai Lu | 2944e16 | 2008-06-01 13:17:38 -0700 | [diff] [blame] | 189 | return 1; |
| 190 | } |
| 191 | |
Jaswinder Singh Rajput | a683027 | 2009-03-18 20:42:28 +0530 | [diff] [blame] | 192 | static void skip_entry(unsigned char **ptr, int *count, int size) |
| 193 | { |
| 194 | *ptr += size; |
| 195 | *count += size; |
| 196 | } |
| 197 | |
Jaswinder Singh Rajput | 5a5737e | 2009-03-21 13:28:39 +0530 | [diff] [blame] | 198 | static void __init smp_dump_mptable(struct mpc_table *mpc, unsigned char *mpt) |
| 199 | { |
Jiang Liu | b1bfd5e | 2014-06-09 16:19:31 +0800 | [diff] [blame] | 200 | pr_err("Your mptable is wrong, contact your HW vendor!\n"); |
| 201 | pr_cont("type %x\n", *mpt); |
Jaswinder Singh Rajput | 5a5737e | 2009-03-21 13:28:39 +0530 | [diff] [blame] | 202 | print_hex_dump(KERN_ERR, " ", DUMP_PREFIX_ADDRESS, 16, |
| 203 | 1, mpc, mpc->length, 1); |
| 204 | } |
| 205 | |
Thomas Gleixner | 7230214 | 2009-08-20 12:18:32 +0200 | [diff] [blame] | 206 | void __init default_smp_read_mpc_oem(struct mpc_table *mpc) { } |
| 207 | |
Jaswinder Singh Rajput | f29521e | 2009-01-03 15:46:57 +0530 | [diff] [blame] | 208 | static int __init smp_read_mpc(struct mpc_table *mpc, unsigned early) |
Yinghai Lu | 2944e16 | 2008-06-01 13:17:38 -0700 | [diff] [blame] | 209 | { |
| 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. Biederman | 5989cd6 | 2010-08-04 13:30:27 -0700 | [diff] [blame] | 219 | /* Initialize the lapic mapping */ |
| 220 | if (!acpi_lapic) |
Yinghai Lu | c0104d3 | 2010-12-07 00:55:17 -0800 | [diff] [blame] | 221 | register_lapic_address(mpc->lapic); |
Eric W. Biederman | 5989cd6 | 2010-08-04 13:30:27 -0700 | [diff] [blame] | 222 | |
Yinghai Lu | f115714 | 2010-12-07 00:55:29 -0800 | [diff] [blame] | 223 | if (early) |
| 224 | return 1; |
| 225 | |
Thomas Gleixner | 7230214 | 2009-08-20 12:18:32 +0200 | [diff] [blame] | 226 | if (mpc->oemptr) |
| 227 | x86_init.mpparse.smp_read_mpc_oem(mpc); |
Yinghai Lu | 64898a8 | 2008-07-19 18:01:16 -0700 | [diff] [blame] | 228 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 229 | /* |
Alexey Starikovskiy | 4ef8129 | 2008-04-04 23:42:03 +0400 | [diff] [blame] | 230 | * Now process the configuration blocks. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 231 | */ |
Thomas Gleixner | f484847 | 2009-08-20 12:05:01 +0200 | [diff] [blame] | 232 | x86_init.mpparse.mpc_record(0); |
Yinghai Lu | 64898a8 | 2008-07-19 18:01:16 -0700 | [diff] [blame] | 233 | |
Jaswinder Singh Rajput | 6c65da5 | 2009-01-04 22:22:56 +0530 | [diff] [blame] | 234 | while (count < mpc->length) { |
Alexey Starikovskiy | 4ef8129 | 2008-04-04 23:42:03 +0400 | [diff] [blame] | 235 | switch (*mpt) { |
| 236 | case MP_PROCESSOR: |
Jaswinder Singh Rajput | a683027 | 2009-03-18 20:42:28 +0530 | [diff] [blame] | 237 | /* ACPI may have already provided this data */ |
| 238 | if (!acpi_lapic) |
Ingo Molnar | c58603e | 2009-03-19 08:50:35 +0100 | [diff] [blame] | 239 | MP_processor_info((struct mpc_cpu *)mpt); |
Jaswinder Singh Rajput | a683027 | 2009-03-18 20:42:28 +0530 | [diff] [blame] | 240 | skip_entry(&mpt, &count, sizeof(struct mpc_cpu)); |
| 241 | break; |
Alexey Starikovskiy | 4ef8129 | 2008-04-04 23:42:03 +0400 | [diff] [blame] | 242 | case MP_BUS: |
Ingo Molnar | c58603e | 2009-03-19 08:50:35 +0100 | [diff] [blame] | 243 | MP_bus_info((struct mpc_bus *)mpt); |
Jaswinder Singh Rajput | a683027 | 2009-03-18 20:42:28 +0530 | [diff] [blame] | 244 | skip_entry(&mpt, &count, sizeof(struct mpc_bus)); |
| 245 | break; |
Alexey Starikovskiy | 4ef8129 | 2008-04-04 23:42:03 +0400 | [diff] [blame] | 246 | case MP_IOAPIC: |
Ingo Molnar | c58603e | 2009-03-19 08:50:35 +0100 | [diff] [blame] | 247 | MP_ioapic_info((struct mpc_ioapic *)mpt); |
Jaswinder Singh Rajput | a683027 | 2009-03-18 20:42:28 +0530 | [diff] [blame] | 248 | skip_entry(&mpt, &count, sizeof(struct mpc_ioapic)); |
| 249 | break; |
Alexey Starikovskiy | 4ef8129 | 2008-04-04 23:42:03 +0400 | [diff] [blame] | 250 | case MP_INTSRC: |
Feng Tang | 2d8009b | 2010-11-19 11:33:35 +0800 | [diff] [blame] | 251 | mp_save_irq((struct mpc_intsrc *)mpt); |
Jaswinder Singh Rajput | a683027 | 2009-03-18 20:42:28 +0530 | [diff] [blame] | 252 | skip_entry(&mpt, &count, sizeof(struct mpc_intsrc)); |
| 253 | break; |
Alexey Starikovskiy | 4ef8129 | 2008-04-04 23:42:03 +0400 | [diff] [blame] | 254 | case MP_LINTSRC: |
Ingo Molnar | c58603e | 2009-03-19 08:50:35 +0100 | [diff] [blame] | 255 | MP_lintsrc_info((struct mpc_lintsrc *)mpt); |
Jaswinder Singh Rajput | a683027 | 2009-03-18 20:42:28 +0530 | [diff] [blame] | 256 | skip_entry(&mpt, &count, sizeof(struct mpc_lintsrc)); |
| 257 | break; |
Alexey Starikovskiy | 4ef8129 | 2008-04-04 23:42:03 +0400 | [diff] [blame] | 258 | default: |
Yinghai Lu | 711554d | 2008-04-07 11:36:39 -0700 | [diff] [blame] | 259 | /* wrong mptable */ |
Jaswinder Singh Rajput | 5a5737e | 2009-03-21 13:28:39 +0530 | [diff] [blame] | 260 | smp_dump_mptable(mpc, mpt); |
Jaswinder Singh Rajput | 6c65da5 | 2009-01-04 22:22:56 +0530 | [diff] [blame] | 261 | count = mpc->length; |
Yinghai Lu | 711554d | 2008-04-07 11:36:39 -0700 | [diff] [blame] | 262 | break; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 263 | } |
Thomas Gleixner | f484847 | 2009-08-20 12:05:01 +0200 | [diff] [blame] | 264 | x86_init.mpparse.mpc_record(1); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 265 | } |
Yinghai Lu | e0da336 | 2008-06-08 18:29:22 -0700 | [diff] [blame] | 266 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 267 | if (!num_processors) |
Jiang Liu | b1bfd5e | 2014-06-09 16:19:31 +0800 | [diff] [blame] | 268 | pr_err("MPTABLE: no processors registered!\n"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 269 | return num_processors; |
| 270 | } |
| 271 | |
Alexey Starikovskiy | 61048c6 | 2008-04-04 23:41:07 +0400 | [diff] [blame] | 272 | #ifdef CONFIG_X86_IO_APIC |
| 273 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 274 | static 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 | |
| 282 | static void __init construct_default_ioirq_mptable(int mpc_default_type) |
| 283 | { |
Jaswinder Singh Rajput | 540d4e7 | 2009-01-03 15:50:52 +0530 | [diff] [blame] | 284 | struct mpc_intsrc intsrc; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 285 | int i; |
| 286 | int ELCR_fallback = 0; |
| 287 | |
Jaswinder Singh Rajput | e253b39 | 2009-01-04 21:56:44 +0530 | [diff] [blame] | 288 | intsrc.type = MP_INTSRC; |
| 289 | intsrc.irqflag = 0; /* conforming */ |
| 290 | intsrc.srcbus = 0; |
Suresh Siddha | d537143 | 2011-05-18 16:31:37 -0700 | [diff] [blame] | 291 | intsrc.dstapic = mpc_ioapic_id(0); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 292 | |
Jaswinder Singh Rajput | e253b39 | 2009-01-04 21:56:44 +0530 | [diff] [blame] | 293 | intsrc.irqtype = mp_INT; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 294 | |
| 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 Liu | b1bfd5e | 2014-06-09 16:19:31 +0800 | [diff] [blame] | 304 | pr_info("ISA/PCI bus type with no IRQ information... falling back to ELCR\n"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 305 | |
Alexey Starikovskiy | 62441bf | 2008-04-04 23:42:34 +0400 | [diff] [blame] | 306 | if (ELCR_trigger(0) || ELCR_trigger(1) || ELCR_trigger(2) || |
| 307 | ELCR_trigger(13)) |
Jiang Liu | b1bfd5e | 2014-06-09 16:19:31 +0800 | [diff] [blame] | 308 | pr_err("ELCR contains invalid data... not using ELCR\n"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 309 | else { |
Jiang Liu | b1bfd5e | 2014-06-09 16:19:31 +0800 | [diff] [blame] | 310 | pr_info("Using ELCR to identify PCI interrupts\n"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 311 | 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 Rajput | e253b39 | 2009-01-04 21:56:44 +0530 | [diff] [blame] | 333 | intsrc.irqflag = 13; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 334 | else |
Jaswinder Singh Rajput | e253b39 | 2009-01-04 21:56:44 +0530 | [diff] [blame] | 335 | intsrc.irqflag = 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 336 | } |
| 337 | |
Jaswinder Singh Rajput | e253b39 | 2009-01-04 21:56:44 +0530 | [diff] [blame] | 338 | intsrc.srcbusirq = i; |
| 339 | intsrc.dstirq = i ? i : 2; /* IRQ0 to INTIN2 */ |
Feng Tang | 2d8009b | 2010-11-19 11:33:35 +0800 | [diff] [blame] | 340 | mp_save_irq(&intsrc); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 341 | } |
| 342 | |
Jaswinder Singh Rajput | e253b39 | 2009-01-04 21:56:44 +0530 | [diff] [blame] | 343 | intsrc.irqtype = mp_ExtINT; |
| 344 | intsrc.srcbusirq = 0; |
| 345 | intsrc.dstirq = 0; /* 8259A to INTIN0 */ |
Feng Tang | 2d8009b | 2010-11-19 11:33:35 +0800 | [diff] [blame] | 346 | mp_save_irq(&intsrc); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 347 | } |
| 348 | |
Alexey Starikovskiy | 61048c6 | 2008-04-04 23:41:07 +0400 | [diff] [blame] | 349 | |
Marcin Slusarz | 39e00fe | 2008-08-11 00:09:38 +0200 | [diff] [blame] | 350 | static void __init construct_ioapic_table(int mpc_default_type) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 351 | { |
Jaswinder Singh Rajput | 2b85b5f | 2009-01-03 15:49:57 +0530 | [diff] [blame] | 352 | struct mpc_ioapic ioapic; |
Jaswinder Singh Rajput | 00fb860 | 2009-01-03 15:47:32 +0530 | [diff] [blame] | 353 | struct mpc_bus bus; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 354 | |
Jaswinder Singh Rajput | d4c715f | 2009-01-04 21:59:26 +0530 | [diff] [blame] | 355 | bus.type = MP_BUS; |
| 356 | bus.busid = 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 357 | switch (mpc_default_type) { |
Alexey Starikovskiy | 4ef8129 | 2008-04-04 23:42:03 +0400 | [diff] [blame] | 358 | default: |
Jiang Liu | b1bfd5e | 2014-06-09 16:19:31 +0800 | [diff] [blame] | 359 | pr_err("???\nUnknown standard configuration %d\n", |
Alexey Starikovskiy | 4ef8129 | 2008-04-04 23:42:03 +0400 | [diff] [blame] | 360 | mpc_default_type); |
| 361 | /* fall through */ |
| 362 | case 1: |
| 363 | case 5: |
Jaswinder Singh Rajput | d4c715f | 2009-01-04 21:59:26 +0530 | [diff] [blame] | 364 | memcpy(bus.bustype, "ISA ", 6); |
Alexey Starikovskiy | 4ef8129 | 2008-04-04 23:42:03 +0400 | [diff] [blame] | 365 | break; |
| 366 | case 2: |
| 367 | case 6: |
| 368 | case 3: |
Jaswinder Singh Rajput | d4c715f | 2009-01-04 21:59:26 +0530 | [diff] [blame] | 369 | memcpy(bus.bustype, "EISA ", 6); |
Alexey Starikovskiy | 4ef8129 | 2008-04-04 23:42:03 +0400 | [diff] [blame] | 370 | break; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 371 | } |
| 372 | MP_bus_info(&bus); |
| 373 | if (mpc_default_type > 4) { |
Jaswinder Singh Rajput | d4c715f | 2009-01-04 21:59:26 +0530 | [diff] [blame] | 374 | bus.busid = 1; |
| 375 | memcpy(bus.bustype, "PCI ", 6); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 376 | MP_bus_info(&bus); |
| 377 | } |
| 378 | |
Cyrill Gorcunov | 8f3e1df | 2009-08-24 21:53:36 +0400 | [diff] [blame] | 379 | 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 Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 384 | 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 Gleixner | 85cc35f | 2008-05-25 21:21:36 +0200 | [diff] [blame] | 390 | } |
| 391 | #else |
Marcin Slusarz | 39e00fe | 2008-08-11 00:09:38 +0200 | [diff] [blame] | 392 | static inline void __init construct_ioapic_table(int mpc_default_type) { } |
Alexey Starikovskiy | 61048c6 | 2008-04-04 23:41:07 +0400 | [diff] [blame] | 393 | #endif |
Thomas Gleixner | 85cc35f | 2008-05-25 21:21:36 +0200 | [diff] [blame] | 394 | |
| 395 | static inline void __init construct_default_ISA_mptable(int mpc_default_type) |
| 396 | { |
Jaswinder Singh Rajput | f4f21b7 | 2009-01-03 15:48:52 +0530 | [diff] [blame] | 397 | struct mpc_cpu processor; |
Jaswinder Singh Rajput | 8fb2952 | 2009-01-03 15:51:54 +0530 | [diff] [blame] | 398 | struct mpc_lintsrc lintsrc; |
Thomas Gleixner | 85cc35f | 2008-05-25 21:21:36 +0200 | [diff] [blame] | 399 | 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 Rajput | c456382 | 2009-01-04 21:58:25 +0530 | [diff] [blame] | 410 | processor.type = MP_PROCESSOR; |
Thomas Gleixner | 85cc35f | 2008-05-25 21:21:36 +0200 | [diff] [blame] | 411 | /* Either an integrated APIC or a discrete 82489DX. */ |
Jaswinder Singh Rajput | c456382 | 2009-01-04 21:58:25 +0530 | [diff] [blame] | 412 | processor.apicver = mpc_default_type > 4 ? 0x10 : 0x01; |
| 413 | processor.cpuflag = CPU_ENABLED; |
| 414 | processor.cpufeature = (boot_cpu_data.x86 << 8) | |
Thomas Gleixner | 85cc35f | 2008-05-25 21:21:36 +0200 | [diff] [blame] | 415 | (boot_cpu_data.x86_model << 4) | boot_cpu_data.x86_mask; |
Jaswinder Singh Rajput | c456382 | 2009-01-04 21:58:25 +0530 | [diff] [blame] | 416 | processor.featureflag = boot_cpu_data.x86_capability[0]; |
| 417 | processor.reserved[0] = 0; |
| 418 | processor.reserved[1] = 0; |
Thomas Gleixner | 85cc35f | 2008-05-25 21:21:36 +0200 | [diff] [blame] | 419 | for (i = 0; i < 2; i++) { |
Jaswinder Singh Rajput | c456382 | 2009-01-04 21:58:25 +0530 | [diff] [blame] | 420 | processor.apicid = i; |
Thomas Gleixner | 85cc35f | 2008-05-25 21:21:36 +0200 | [diff] [blame] | 421 | MP_processor_info(&processor); |
| 422 | } |
| 423 | |
| 424 | construct_ioapic_table(mpc_default_type); |
| 425 | |
Jaswinder Singh Rajput | b5ced7c | 2009-01-04 21:55:53 +0530 | [diff] [blame] | 426 | lintsrc.type = MP_LINTSRC; |
| 427 | lintsrc.irqflag = 0; /* conforming */ |
| 428 | lintsrc.srcbusid = 0; |
| 429 | lintsrc.srcbusirq = 0; |
| 430 | lintsrc.destapic = MP_APIC_ALL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 431 | for (i = 0; i < 2; i++) { |
Jaswinder Singh Rajput | b5ced7c | 2009-01-04 21:55:53 +0530 | [diff] [blame] | 432 | lintsrc.irqtype = linttypes[i]; |
| 433 | lintsrc.destapiclint = i; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 434 | MP_lintsrc_info(&lintsrc); |
| 435 | } |
| 436 | } |
| 437 | |
Jaswinder Singh Rajput | 41401db | 2009-01-08 15:42:46 +0530 | [diff] [blame] | 438 | static struct mpf_intel *mpf_found; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 439 | |
Yinghai Lu | 8d4dd91 | 2009-03-04 01:25:21 -0800 | [diff] [blame] | 440 | static 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 Rajput | 0b3ba0c | 2009-03-21 13:43:20 +0530 | [diff] [blame] | 453 | static 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 Liu | b1bfd5e | 2014-06-09 16:19:31 +0800 | [diff] [blame] | 468 | pr_err("BIOS bug, MP table errors detected!...\n"); |
| 469 | pr_cont("... disabling SMP support. (tell your hw vendor)\n"); |
Jaswinder Singh Rajput | 0b3ba0c | 2009-03-21 13:43:20 +0530 | [diff] [blame] | 470 | 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 Liu | b1bfd5e | 2014-06-09 16:19:31 +0800 | [diff] [blame] | 487 | pr_err("BIOS bug, no explicit IRQ entries, using default mptable. (tell your hw vendor)\n"); |
Jaswinder Singh Rajput | 0b3ba0c | 2009-03-21 13:43:20 +0530 | [diff] [blame] | 488 | |
| 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 Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 501 | /* |
| 502 | * Scan the memory blocks for an SMP configuration block. |
| 503 | */ |
Thomas Gleixner | b3f1b61 | 2009-08-20 11:11:52 +0200 | [diff] [blame] | 504 | void __init default_get_smp_config(unsigned int early) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 505 | { |
Jaswinder Singh Rajput | 41401db | 2009-01-08 15:42:46 +0530 | [diff] [blame] | 506 | struct mpf_intel *mpf = mpf_found; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 507 | |
Yinghai Lu | 69b88af | 2008-12-05 22:45:50 -0800 | [diff] [blame] | 508 | 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 Liu | b1bfd5e | 2014-06-09 16:19:31 +0800 | [diff] [blame] | 521 | pr_info("Intel MultiProcessor Specification v1.%d\n", |
| 522 | mpf->specification); |
Alexey Starikovskiy | b3e2416 | 2008-05-23 01:54:44 +0400 | [diff] [blame] | 523 | #if defined(CONFIG_X86_LOCAL_APIC) && defined(CONFIG_X86_32) |
Jaswinder Singh Rajput | 1eb1b3b | 2009-01-08 15:43:26 +0530 | [diff] [blame] | 524 | if (mpf->feature2 & (1 << 7)) { |
Jiang Liu | b1bfd5e | 2014-06-09 16:19:31 +0800 | [diff] [blame] | 525 | pr_info(" IMCR and PIC compatibility mode.\n"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 526 | pic_mode = 1; |
| 527 | } else { |
Jiang Liu | b1bfd5e | 2014-06-09 16:19:31 +0800 | [diff] [blame] | 528 | pr_info(" Virtual Wire compatibility mode.\n"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 529 | pic_mode = 0; |
| 530 | } |
Alexey Starikovskiy | 4421b1c | 2008-04-04 23:42:40 +0400 | [diff] [blame] | 531 | #endif |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 532 | /* |
| 533 | * Now see if we need to read further. |
| 534 | */ |
Jaswinder Singh Rajput | 1eb1b3b | 2009-01-08 15:43:26 +0530 | [diff] [blame] | 535 | if (mpf->feature1 != 0) { |
Alexey Starikovskiy | 888032c | 2008-04-04 23:42:09 +0400 | [diff] [blame] | 536 | if (early) { |
| 537 | /* |
| 538 | * local APIC has default address |
| 539 | */ |
| 540 | mp_lapic_addr = APIC_DEFAULT_PHYS_BASE; |
| 541 | return; |
| 542 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 543 | |
Jiang Liu | b1bfd5e | 2014-06-09 16:19:31 +0800 | [diff] [blame] | 544 | pr_info("Default MP configuration #%d\n", mpf->feature1); |
Jaswinder Singh Rajput | 1eb1b3b | 2009-01-08 15:43:26 +0530 | [diff] [blame] | 545 | construct_default_ISA_mptable(mpf->feature1); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 546 | |
Jaswinder Singh Rajput | 1eb1b3b | 2009-01-08 15:43:26 +0530 | [diff] [blame] | 547 | } else if (mpf->physptr) { |
Jaswinder Singh Rajput | 0b3ba0c | 2009-03-21 13:43:20 +0530 | [diff] [blame] | 548 | if (check_physptr(mpf, early)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 549 | return; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 550 | } else |
| 551 | BUG(); |
| 552 | |
Alexey Starikovskiy | 888032c | 2008-04-04 23:42:09 +0400 | [diff] [blame] | 553 | if (!early) |
Jiang Liu | b1bfd5e | 2014-06-09 16:19:31 +0800 | [diff] [blame] | 554 | pr_info("Processors: %d\n", num_processors); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 555 | /* |
| 556 | * Only use the first configuration found. |
| 557 | */ |
| 558 | } |
| 559 | |
Yinghai Lu | b24c2a9 | 2009-11-24 02:48:18 -0800 | [diff] [blame] | 560 | static void __init smp_reserve_memory(struct mpf_intel *mpf) |
Jaswinder Singh Rajput | a683027 | 2009-03-18 20:42:28 +0530 | [diff] [blame] | 561 | { |
Tejun Heo | 24aa078 | 2011-07-12 11:16:06 +0200 | [diff] [blame] | 562 | memblock_reserve(mpf->physptr, get_mpc_size(mpf->physptr)); |
Jaswinder Singh Rajput | a683027 | 2009-03-18 20:42:28 +0530 | [diff] [blame] | 563 | } |
| 564 | |
Yinghai Lu | b24c2a9 | 2009-11-24 02:48:18 -0800 | [diff] [blame] | 565 | static int __init smp_scan_config(unsigned long base, unsigned long length) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 566 | { |
Alexey Starikovskiy | 92fd4b7 | 2008-04-04 23:42:46 +0400 | [diff] [blame] | 567 | unsigned int *bp = phys_to_virt(base); |
Jaswinder Singh Rajput | 41401db | 2009-01-08 15:42:46 +0530 | [diff] [blame] | 568 | struct mpf_intel *mpf; |
Yinghai Lu | b24c2a9 | 2009-11-24 02:48:18 -0800 | [diff] [blame] | 569 | unsigned long mem; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 570 | |
Bjorn Helgaas | 365811d | 2012-05-29 15:06:29 -0700 | [diff] [blame] | 571 | apic_printk(APIC_VERBOSE, "Scan for SMP in [mem %#010lx-%#010lx]\n", |
| 572 | base, base + length - 1); |
Akinobu Mita | 5d47a27 | 2008-04-19 23:55:11 +0900 | [diff] [blame] | 573 | BUILD_BUG_ON(sizeof(*mpf) != 16); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 574 | |
| 575 | while (length > 0) { |
Jaswinder Singh Rajput | 41401db | 2009-01-08 15:42:46 +0530 | [diff] [blame] | 576 | mpf = (struct mpf_intel *)bp; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 577 | if ((*bp == SMP_MAGIC_IDENT) && |
Jaswinder Singh Rajput | 1eb1b3b | 2009-01-08 15:43:26 +0530 | [diff] [blame] | 578 | (mpf->length == 1) && |
Alexey Starikovskiy | 4ef8129 | 2008-04-04 23:42:03 +0400 | [diff] [blame] | 579 | !mpf_checksum((unsigned char *)bp, 16) && |
Jaswinder Singh Rajput | 1eb1b3b | 2009-01-08 15:43:26 +0530 | [diff] [blame] | 580 | ((mpf->specification == 1) |
| 581 | || (mpf->specification == 4))) { |
Alexey Starikovskiy | bab4b27 | 2008-05-19 19:47:03 +0400 | [diff] [blame] | 582 | #ifdef CONFIG_X86_LOCAL_APIC |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 583 | smp_found_config = 1; |
Alexey Starikovskiy | bab4b27 | 2008-05-19 19:47:03 +0400 | [diff] [blame] | 584 | #endif |
Alexey Starikovskiy | 92fd4b7 | 2008-04-04 23:42:46 +0400 | [diff] [blame] | 585 | mpf_found = mpf; |
Yinghai Lu | b1f006b | 2008-06-09 18:11:36 -0700 | [diff] [blame] | 586 | |
Jiang Liu | b1bfd5e | 2014-06-09 16:19:31 +0800 | [diff] [blame] | 587 | 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 Lu | b1f006b | 2008-06-09 18:11:36 -0700 | [diff] [blame] | 591 | |
Yinghai Lu | b24c2a9 | 2009-11-24 02:48:18 -0800 | [diff] [blame] | 592 | mem = virt_to_phys(mpf); |
Tejun Heo | 24aa078 | 2011-07-12 11:16:06 +0200 | [diff] [blame] | 593 | memblock_reserve(mem, sizeof(*mpf)); |
Jaswinder Singh Rajput | a683027 | 2009-03-18 20:42:28 +0530 | [diff] [blame] | 594 | if (mpf->physptr) |
Yinghai Lu | b24c2a9 | 2009-11-24 02:48:18 -0800 | [diff] [blame] | 595 | smp_reserve_memory(mpf); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 596 | |
Yinghai Lu | d2dbf34 | 2008-06-13 02:00:56 -0700 | [diff] [blame] | 597 | return 1; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 598 | } |
| 599 | bp += 4; |
| 600 | length -= 16; |
| 601 | } |
| 602 | return 0; |
| 603 | } |
| 604 | |
Yinghai Lu | b24c2a9 | 2009-11-24 02:48:18 -0800 | [diff] [blame] | 605 | void __init default_find_smp_config(void) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 606 | { |
| 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 Lu | b24c2a9 | 2009-11-24 02:48:18 -0800 | [diff] [blame] | 617 | if (smp_scan_config(0x0, 0x400) || |
| 618 | smp_scan_config(639 * 0x400, 0x400) || |
| 619 | smp_scan_config(0xF0000, 0x10000)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 620 | return; |
| 621 | /* |
| 622 | * If it is an SMP machine we should know now, unless the |
Paul Gortmaker | bb8187d | 2012-05-17 19:06:13 -0400 | [diff] [blame] | 623 | * configuration is in an EISA bus machine with an |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 624 | * 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 Lu | b24c2a9 | 2009-11-24 02:48:18 -0800 | [diff] [blame] | 640 | smp_scan_config(address, 0x400); |
Alexey Starikovskiy | 888032c | 2008-04-04 23:42:09 +0400 | [diff] [blame] | 641 | } |
| 642 | |
Yinghai Lu | 2944e16 | 2008-06-01 13:17:38 -0700 | [diff] [blame] | 643 | #ifdef CONFIG_X86_IO_APIC |
| 644 | static u8 __initdata irq_used[MAX_IRQ_SOURCES]; |
| 645 | |
Jaswinder Singh Rajput | 540d4e7 | 2009-01-03 15:50:52 +0530 | [diff] [blame] | 646 | static int __init get_MP_intsrc_index(struct mpc_intsrc *m) |
Yinghai Lu | 2944e16 | 2008-06-01 13:17:38 -0700 | [diff] [blame] | 647 | { |
| 648 | int i; |
| 649 | |
Jaswinder Singh Rajput | e253b39 | 2009-01-04 21:56:44 +0530 | [diff] [blame] | 650 | if (m->irqtype != mp_INT) |
Yinghai Lu | 2944e16 | 2008-06-01 13:17:38 -0700 | [diff] [blame] | 651 | return 0; |
| 652 | |
Jaswinder Singh Rajput | e253b39 | 2009-01-04 21:56:44 +0530 | [diff] [blame] | 653 | if (m->irqflag != 0x0f) |
Yinghai Lu | 2944e16 | 2008-06-01 13:17:38 -0700 | [diff] [blame] | 654 | return 0; |
| 655 | |
| 656 | /* not legacy */ |
| 657 | |
| 658 | for (i = 0; i < mp_irq_entries; i++) { |
Jaswinder Singh Rajput | c2c2174 | 2009-01-12 17:47:22 +0530 | [diff] [blame] | 659 | if (mp_irqs[i].irqtype != mp_INT) |
Yinghai Lu | 2944e16 | 2008-06-01 13:17:38 -0700 | [diff] [blame] | 660 | continue; |
| 661 | |
Jaswinder Singh Rajput | c2c2174 | 2009-01-12 17:47:22 +0530 | [diff] [blame] | 662 | if (mp_irqs[i].irqflag != 0x0f) |
Yinghai Lu | 2944e16 | 2008-06-01 13:17:38 -0700 | [diff] [blame] | 663 | continue; |
| 664 | |
Jaswinder Singh Rajput | c2c2174 | 2009-01-12 17:47:22 +0530 | [diff] [blame] | 665 | if (mp_irqs[i].srcbus != m->srcbus) |
Yinghai Lu | 2944e16 | 2008-06-01 13:17:38 -0700 | [diff] [blame] | 666 | continue; |
Jaswinder Singh Rajput | c2c2174 | 2009-01-12 17:47:22 +0530 | [diff] [blame] | 667 | if (mp_irqs[i].srcbusirq != m->srcbusirq) |
Yinghai Lu | 2944e16 | 2008-06-01 13:17:38 -0700 | [diff] [blame] | 668 | 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 Rajput | 540d4e7 | 2009-01-03 15:50:52 +0530 | [diff] [blame] | 683 | static struct mpc_intsrc __initdata *m_spare[SPARE_SLOT_NUM]; |
Jaswinder Singh Rajput | a683027 | 2009-03-18 20:42:28 +0530 | [diff] [blame] | 684 | |
Rakib Mullick | 5759222 | 2009-04-11 09:04:59 +0600 | [diff] [blame] | 685 | static void __init check_irq_src(struct mpc_intsrc *m, int *nr_m_spare) |
Jaswinder Singh Rajput | a683027 | 2009-03-18 20:42:28 +0530 | [diff] [blame] | 686 | { |
| 687 | int i; |
| 688 | |
| 689 | apic_printk(APIC_VERBOSE, "OLD "); |
Feng Tang | 0e3fa13 | 2010-12-08 15:18:57 +0800 | [diff] [blame] | 690 | print_mp_irq_info(m); |
Jaswinder Singh Rajput | a683027 | 2009-03-18 20:42:28 +0530 | [diff] [blame] | 691 | |
| 692 | i = get_MP_intsrc_index(m); |
| 693 | if (i > 0) { |
Feng Tang | 0e3fa13 | 2010-12-08 15:18:57 +0800 | [diff] [blame] | 694 | memcpy(m, &mp_irqs[i], sizeof(*m)); |
Jaswinder Singh Rajput | a683027 | 2009-03-18 20:42:28 +0530 | [diff] [blame] | 695 | 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 Rajput | a683027 | 2009-03-18 20:42:28 +0530 | [diff] [blame] | 712 | |
Rakib Mullick | 64d21fc | 2011-04-02 13:17:48 +0600 | [diff] [blame] | 713 | static int __init |
Yinghai Lu | ee21455 | 2009-05-06 10:07:07 -0700 | [diff] [blame] | 714 | check_slot(unsigned long mpc_new_phys, unsigned long mpc_new_length, int count) |
Jaswinder Singh Rajput | a683027 | 2009-03-18 20:42:28 +0530 | [diff] [blame] | 715 | { |
Yinghai Lu | ee21455 | 2009-05-06 10:07:07 -0700 | [diff] [blame] | 716 | 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 Rajput | a683027 | 2009-03-18 20:42:28 +0530 | [diff] [blame] | 719 | } |
| 720 | |
Rakib Mullick | 9f1f1bf | 2011-03-23 21:31:40 +0600 | [diff] [blame] | 721 | return 0; |
Jaswinder Singh Rajput | a683027 | 2009-03-18 20:42:28 +0530 | [diff] [blame] | 722 | } |
Rakib Mullick | cbb84c4 | 2011-03-22 15:24:54 +0600 | [diff] [blame] | 723 | #else /* CONFIG_X86_IO_APIC */ |
| 724 | static |
| 725 | inline void __init check_irq_src(struct mpc_intsrc *m, int *nr_m_spare) {} |
| 726 | #endif /* CONFIG_X86_IO_APIC */ |
Yinghai Lu | 2944e16 | 2008-06-01 13:17:38 -0700 | [diff] [blame] | 727 | |
Jaswinder Singh Rajput | f29521e | 2009-01-03 15:46:57 +0530 | [diff] [blame] | 728 | static int __init replace_intsrc_all(struct mpc_table *mpc, |
Yinghai Lu | 2944e16 | 2008-06-01 13:17:38 -0700 | [diff] [blame] | 729 | unsigned long mpc_new_phys, |
| 730 | unsigned long mpc_new_length) |
| 731 | { |
| 732 | #ifdef CONFIG_X86_IO_APIC |
| 733 | int i; |
Yinghai Lu | 2944e16 | 2008-06-01 13:17:38 -0700 | [diff] [blame] | 734 | #endif |
Yinghai Lu | 2944e16 | 2008-06-01 13:17:38 -0700 | [diff] [blame] | 735 | int count = sizeof(*mpc); |
Jaswinder Singh Rajput | a683027 | 2009-03-18 20:42:28 +0530 | [diff] [blame] | 736 | int nr_m_spare = 0; |
Yinghai Lu | 2944e16 | 2008-06-01 13:17:38 -0700 | [diff] [blame] | 737 | unsigned char *mpt = ((unsigned char *)mpc) + count; |
| 738 | |
Jiang Liu | b1bfd5e | 2014-06-09 16:19:31 +0800 | [diff] [blame] | 739 | pr_info("mpc_length %x\n", mpc->length); |
Jaswinder Singh Rajput | 6c65da5 | 2009-01-04 22:22:56 +0530 | [diff] [blame] | 740 | while (count < mpc->length) { |
Yinghai Lu | 2944e16 | 2008-06-01 13:17:38 -0700 | [diff] [blame] | 741 | switch (*mpt) { |
| 742 | case MP_PROCESSOR: |
Jaswinder Singh Rajput | a683027 | 2009-03-18 20:42:28 +0530 | [diff] [blame] | 743 | skip_entry(&mpt, &count, sizeof(struct mpc_cpu)); |
| 744 | break; |
Yinghai Lu | 2944e16 | 2008-06-01 13:17:38 -0700 | [diff] [blame] | 745 | case MP_BUS: |
Jaswinder Singh Rajput | a683027 | 2009-03-18 20:42:28 +0530 | [diff] [blame] | 746 | skip_entry(&mpt, &count, sizeof(struct mpc_bus)); |
| 747 | break; |
Yinghai Lu | 2944e16 | 2008-06-01 13:17:38 -0700 | [diff] [blame] | 748 | case MP_IOAPIC: |
Jaswinder Singh Rajput | a683027 | 2009-03-18 20:42:28 +0530 | [diff] [blame] | 749 | skip_entry(&mpt, &count, sizeof(struct mpc_ioapic)); |
| 750 | break; |
Yinghai Lu | 2944e16 | 2008-06-01 13:17:38 -0700 | [diff] [blame] | 751 | case MP_INTSRC: |
Ingo Molnar | c58603e | 2009-03-19 08:50:35 +0100 | [diff] [blame] | 752 | check_irq_src((struct mpc_intsrc *)mpt, &nr_m_spare); |
Jaswinder Singh Rajput | a683027 | 2009-03-18 20:42:28 +0530 | [diff] [blame] | 753 | skip_entry(&mpt, &count, sizeof(struct mpc_intsrc)); |
| 754 | break; |
Yinghai Lu | 2944e16 | 2008-06-01 13:17:38 -0700 | [diff] [blame] | 755 | case MP_LINTSRC: |
Jaswinder Singh Rajput | a683027 | 2009-03-18 20:42:28 +0530 | [diff] [blame] | 756 | skip_entry(&mpt, &count, sizeof(struct mpc_lintsrc)); |
| 757 | break; |
Yinghai Lu | 2944e16 | 2008-06-01 13:17:38 -0700 | [diff] [blame] | 758 | default: |
| 759 | /* wrong mptable */ |
Jaswinder Singh Rajput | 5a5737e | 2009-03-21 13:28:39 +0530 | [diff] [blame] | 760 | smp_dump_mptable(mpc, mpt); |
Yinghai Lu | 2944e16 | 2008-06-01 13:17:38 -0700 | [diff] [blame] | 761 | 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 Rajput | c2c2174 | 2009-01-12 17:47:22 +0530 | [diff] [blame] | 770 | if (mp_irqs[i].irqtype != mp_INT) |
Yinghai Lu | 2944e16 | 2008-06-01 13:17:38 -0700 | [diff] [blame] | 771 | continue; |
| 772 | |
Jaswinder Singh Rajput | c2c2174 | 2009-01-12 17:47:22 +0530 | [diff] [blame] | 773 | if (mp_irqs[i].irqflag != 0x0f) |
Yinghai Lu | 2944e16 | 2008-06-01 13:17:38 -0700 | [diff] [blame] | 774 | continue; |
| 775 | |
| 776 | if (nr_m_spare > 0) { |
Jan Beulich | 82034d6 | 2009-03-12 12:57:10 +0000 | [diff] [blame] | 777 | apic_printk(APIC_VERBOSE, "*NEW* found\n"); |
Yinghai Lu | 2944e16 | 2008-06-01 13:17:38 -0700 | [diff] [blame] | 778 | nr_m_spare--; |
Feng Tang | 0e3fa13 | 2010-12-08 15:18:57 +0800 | [diff] [blame] | 779 | memcpy(m_spare[nr_m_spare], &mp_irqs[i], sizeof(mp_irqs[i])); |
Yinghai Lu | 2944e16 | 2008-06-01 13:17:38 -0700 | [diff] [blame] | 780 | m_spare[nr_m_spare] = NULL; |
| 781 | } else { |
Jaswinder Singh Rajput | 540d4e7 | 2009-01-03 15:50:52 +0530 | [diff] [blame] | 782 | struct mpc_intsrc *m = (struct mpc_intsrc *)mpt; |
| 783 | count += sizeof(struct mpc_intsrc); |
Yinghai Lu | ee21455 | 2009-05-06 10:07:07 -0700 | [diff] [blame] | 784 | if (check_slot(mpc_new_phys, mpc_new_length, count) < 0) |
Jaswinder Singh Rajput | a683027 | 2009-03-18 20:42:28 +0530 | [diff] [blame] | 785 | goto out; |
Feng Tang | 0e3fa13 | 2010-12-08 15:18:57 +0800 | [diff] [blame] | 786 | memcpy(m, &mp_irqs[i], sizeof(*m)); |
Jaswinder Singh Rajput | 6c65da5 | 2009-01-04 22:22:56 +0530 | [diff] [blame] | 787 | mpc->length = count; |
Jaswinder Singh Rajput | 540d4e7 | 2009-01-03 15:50:52 +0530 | [diff] [blame] | 788 | mpt += sizeof(struct mpc_intsrc); |
Yinghai Lu | 2944e16 | 2008-06-01 13:17:38 -0700 | [diff] [blame] | 789 | } |
| 790 | print_mp_irq_info(&mp_irqs[i]); |
| 791 | } |
| 792 | #endif |
| 793 | out: |
| 794 | /* update checksum */ |
Jaswinder Singh Rajput | 6c65da5 | 2009-01-04 22:22:56 +0530 | [diff] [blame] | 795 | mpc->checksum = 0; |
| 796 | mpc->checksum -= mpf_checksum((unsigned char *)mpc, mpc->length); |
Yinghai Lu | 2944e16 | 2008-06-01 13:17:38 -0700 | [diff] [blame] | 797 | |
| 798 | return 0; |
| 799 | } |
| 800 | |
Yinghai Lu | f1bdb52 | 2009-05-15 13:05:16 -0700 | [diff] [blame] | 801 | int enable_update_mptable; |
Yinghai Lu | fcfa146 | 2008-06-18 17:29:31 -0700 | [diff] [blame] | 802 | |
Yinghai Lu | 2944e16 | 2008-06-01 13:17:38 -0700 | [diff] [blame] | 803 | static int __init update_mptable_setup(char *str) |
| 804 | { |
| 805 | enable_update_mptable = 1; |
Yinghai Lu | 629e15d | 2009-05-15 13:05:16 -0700 | [diff] [blame] | 806 | #ifdef CONFIG_PCI |
| 807 | pci_routeirq = 1; |
| 808 | #endif |
Yinghai Lu | 2944e16 | 2008-06-01 13:17:38 -0700 | [diff] [blame] | 809 | return 0; |
| 810 | } |
| 811 | early_param("update_mptable", update_mptable_setup); |
| 812 | |
| 813 | static unsigned long __initdata mpc_new_phys; |
| 814 | static unsigned long mpc_new_length __initdata = 4096; |
| 815 | |
| 816 | /* alloc_mptable or alloc_mptable=4k */ |
| 817 | static int __initdata alloc_mptable; |
| 818 | static int __init parse_alloc_mptable_opt(char *p) |
| 819 | { |
| 820 | enable_update_mptable = 1; |
Yinghai Lu | 629e15d | 2009-05-15 13:05:16 -0700 | [diff] [blame] | 821 | #ifdef CONFIG_PCI |
| 822 | pci_routeirq = 1; |
| 823 | #endif |
Yinghai Lu | 2944e16 | 2008-06-01 13:17:38 -0700 | [diff] [blame] | 824 | alloc_mptable = 1; |
| 825 | if (!p) |
| 826 | return 0; |
| 827 | mpc_new_length = memparse(p, &p); |
| 828 | return 0; |
| 829 | } |
| 830 | early_param("alloc_mptable", parse_alloc_mptable_opt); |
| 831 | |
| 832 | void __init early_reserve_e820_mpc_new(void) |
| 833 | { |
Tejun Heo | ab5d140 | 2011-07-12 11:15:58 +0200 | [diff] [blame] | 834 | if (enable_update_mptable && alloc_mptable) |
| 835 | mpc_new_phys = early_reserve_e820(mpc_new_length, 4); |
Yinghai Lu | 2944e16 | 2008-06-01 13:17:38 -0700 | [diff] [blame] | 836 | } |
| 837 | |
| 838 | static int __init update_mp_table(void) |
| 839 | { |
| 840 | char str[16]; |
| 841 | char oem[10]; |
Jaswinder Singh Rajput | 41401db | 2009-01-08 15:42:46 +0530 | [diff] [blame] | 842 | struct mpf_intel *mpf; |
Jaswinder Singh Rajput | f29521e | 2009-01-03 15:46:57 +0530 | [diff] [blame] | 843 | struct mpc_table *mpc, *mpc_new; |
Yinghai Lu | 2944e16 | 2008-06-01 13:17:38 -0700 | [diff] [blame] | 844 | |
| 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 Rajput | 1eb1b3b | 2009-01-08 15:43:26 +0530 | [diff] [blame] | 855 | if (mpf->feature1 != 0) |
Yinghai Lu | 2944e16 | 2008-06-01 13:17:38 -0700 | [diff] [blame] | 856 | return 0; |
| 857 | |
Jaswinder Singh Rajput | 1eb1b3b | 2009-01-08 15:43:26 +0530 | [diff] [blame] | 858 | if (!mpf->physptr) |
Yinghai Lu | 2944e16 | 2008-06-01 13:17:38 -0700 | [diff] [blame] | 859 | return 0; |
| 860 | |
Jaswinder Singh Rajput | 1eb1b3b | 2009-01-08 15:43:26 +0530 | [diff] [blame] | 861 | mpc = phys_to_virt(mpf->physptr); |
Yinghai Lu | 2944e16 | 2008-06-01 13:17:38 -0700 | [diff] [blame] | 862 | |
| 863 | if (!smp_check_mpc(mpc, oem, str)) |
| 864 | return 0; |
| 865 | |
Jiang Liu | b1bfd5e | 2014-06-09 16:19:31 +0800 | [diff] [blame] | 866 | pr_info("mpf: %llx\n", (u64)virt_to_phys(mpf)); |
| 867 | pr_info("physptr: %x\n", mpf->physptr); |
Yinghai Lu | 2944e16 | 2008-06-01 13:17:38 -0700 | [diff] [blame] | 868 | |
Jaswinder Singh Rajput | 6c65da5 | 2009-01-04 22:22:56 +0530 | [diff] [blame] | 869 | if (mpc_new_phys && mpc->length > mpc_new_length) { |
Yinghai Lu | 2944e16 | 2008-06-01 13:17:38 -0700 | [diff] [blame] | 870 | mpc_new_phys = 0; |
Jiang Liu | b1bfd5e | 2014-06-09 16:19:31 +0800 | [diff] [blame] | 871 | pr_info("mpc_new_length is %ld, please use alloc_mptable=8k\n", |
| 872 | mpc_new_length); |
Yinghai Lu | 2944e16 | 2008-06-01 13:17:38 -0700 | [diff] [blame] | 873 | } |
| 874 | |
| 875 | if (!mpc_new_phys) { |
| 876 | unsigned char old, new; |
Lucas De Marchi | 0d2eb44 | 2011-03-17 16:24:16 -0300 | [diff] [blame] | 877 | /* check if we can change the position */ |
Jaswinder Singh Rajput | 6c65da5 | 2009-01-04 22:22:56 +0530 | [diff] [blame] | 878 | 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 Lu | 2944e16 | 2008-06-01 13:17:38 -0700 | [diff] [blame] | 882 | if (old == new) { |
Jiang Liu | b1bfd5e | 2014-06-09 16:19:31 +0800 | [diff] [blame] | 883 | pr_info("mpc is readonly, please try alloc_mptable instead\n"); |
Yinghai Lu | 2944e16 | 2008-06-01 13:17:38 -0700 | [diff] [blame] | 884 | return 0; |
| 885 | } |
Jiang Liu | b1bfd5e | 2014-06-09 16:19:31 +0800 | [diff] [blame] | 886 | pr_info("use in-position replacing\n"); |
Yinghai Lu | 2944e16 | 2008-06-01 13:17:38 -0700 | [diff] [blame] | 887 | } else { |
Jaswinder Singh Rajput | 1eb1b3b | 2009-01-08 15:43:26 +0530 | [diff] [blame] | 888 | mpf->physptr = mpc_new_phys; |
Yinghai Lu | 2944e16 | 2008-06-01 13:17:38 -0700 | [diff] [blame] | 889 | mpc_new = phys_to_virt(mpc_new_phys); |
Jaswinder Singh Rajput | 6c65da5 | 2009-01-04 22:22:56 +0530 | [diff] [blame] | 890 | memcpy(mpc_new, mpc, mpc->length); |
Yinghai Lu | 2944e16 | 2008-06-01 13:17:38 -0700 | [diff] [blame] | 891 | mpc = mpc_new; |
| 892 | /* check if we can modify that */ |
Jaswinder Singh Rajput | 1eb1b3b | 2009-01-08 15:43:26 +0530 | [diff] [blame] | 893 | if (mpc_new_phys - mpf->physptr) { |
Jaswinder Singh Rajput | 41401db | 2009-01-08 15:42:46 +0530 | [diff] [blame] | 894 | struct mpf_intel *mpf_new; |
Yinghai Lu | 2944e16 | 2008-06-01 13:17:38 -0700 | [diff] [blame] | 895 | /* steal 16 bytes from [0, 1k) */ |
Jiang Liu | b1bfd5e | 2014-06-09 16:19:31 +0800 | [diff] [blame] | 896 | pr_info("mpf new: %x\n", 0x400 - 16); |
Yinghai Lu | 2944e16 | 2008-06-01 13:17:38 -0700 | [diff] [blame] | 897 | mpf_new = phys_to_virt(0x400 - 16); |
| 898 | memcpy(mpf_new, mpf, 16); |
| 899 | mpf = mpf_new; |
Jaswinder Singh Rajput | 1eb1b3b | 2009-01-08 15:43:26 +0530 | [diff] [blame] | 900 | mpf->physptr = mpc_new_phys; |
Yinghai Lu | 2944e16 | 2008-06-01 13:17:38 -0700 | [diff] [blame] | 901 | } |
Jaswinder Singh Rajput | 1eb1b3b | 2009-01-08 15:43:26 +0530 | [diff] [blame] | 902 | mpf->checksum = 0; |
| 903 | mpf->checksum -= mpf_checksum((unsigned char *)mpf, 16); |
Jiang Liu | b1bfd5e | 2014-06-09 16:19:31 +0800 | [diff] [blame] | 904 | pr_info("physptr new: %x\n", mpf->physptr); |
Yinghai Lu | 2944e16 | 2008-06-01 13:17:38 -0700 | [diff] [blame] | 905 | } |
| 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 | |
| 918 | late_initcall(update_mp_table); |