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Kevin O'Connor84ad59a2008-07-04 05:47:26 -04001// MPTable generation (on emulators)
2//
Kevin O'Connor9fd48512010-07-26 22:34:37 -04003// Copyright (C) 2008-2010 Kevin O'Connor <kevin@koconnor.net>
Kevin O'Connor84ad59a2008-07-04 05:47:26 -04004// Copyright (C) 2006 Fabrice Bellard
5//
Kevin O'Connorb1b7c2a2009-01-15 20:52:58 -05006// This file may be distributed under the terms of the GNU LGPLv3 license.
Kevin O'Connor84ad59a2008-07-04 05:47:26 -04007
8#include "util.h" // dprintf
Kevin O'Connor9521e262008-07-04 13:04:29 -04009#include "config.h" // CONFIG_*
Kevin O'Connor35746442009-02-27 20:54:51 -050010#include "mptable.h" // MPTABLE_SIGNATURE
Kevin O'Connor86916ce2009-11-14 13:34:27 -050011#include "paravirt.h" // qemu_cfg_irq0_override
Gleb Natapov928d4df2009-12-24 14:29:43 +020012#include "pci.h"
13#include "pci_regs.h"
Kevin O'Connorc0ad0e82009-11-09 19:20:21 -050014
Kevin O'Connor84ad59a2008-07-04 05:47:26 -040015void
16mptable_init(void)
17{
Kevin O'Connord3817022008-07-12 12:46:07 -040018 if (! CONFIG_MPTABLE)
19 return;
20
Kevin O'Connor7b49cd92008-11-08 10:35:26 -050021 dprintf(3, "init MPTable\n");
22
Kevin O'Connor83626992009-12-26 11:15:31 -050023 // Config structure in temp area.
Kevin O'Connor34e9cc52010-06-06 11:07:08 -040024 struct mptable_config_s *config = malloc_tmp(32*1024);
Kevin O'Connor83626992009-12-26 11:15:31 -050025 if (!config) {
Kevin O'Connorcfdc13f2010-02-14 13:07:54 -050026 warn_noalloc();
Kevin O'Connor35746442009-02-27 20:54:51 -050027 return;
28 }
Kevin O'Connor35746442009-02-27 20:54:51 -050029 memset(config, 0, sizeof(*config));
30 config->signature = MPCONFIG_SIGNATURE;
Kevin O'Connor35746442009-02-27 20:54:51 -050031 config->spec = 4;
32 memcpy(config->oemid, CONFIG_CPUNAME8, sizeof(config->oemid));
33 memcpy(config->productid, "0.1 ", sizeof(config->productid));
Kevin O'Connor35746442009-02-27 20:54:51 -050034 config->lapic = BUILD_APIC_ADDR;
35
Kevin O'Connor86916ce2009-11-14 13:34:27 -050036 // Detect cpu info
Kevin O'Connore97ca7b2009-06-21 09:10:28 -040037 u32 cpuid_signature, ebx, ecx, cpuid_features;
38 cpuid(1, &cpuid_signature, &ebx, &ecx, &cpuid_features);
Kevin O'Connorbf7f1f32010-02-11 22:19:14 -050039 if (! cpuid_signature) {
40 // Use default values.
41 cpuid_signature = 0x600;
42 cpuid_features = 0x201;
43 }
Kevin O'Connor86916ce2009-11-14 13:34:27 -050044 int pkgcpus = 1;
45 if (cpuid_features & (1 << 28)) {
46 /* Only populate the MPS tables with the first logical CPU in
47 each package */
48 pkgcpus = (ebx >> 16) & 0xff;
49 pkgcpus = 1 << (__fls(pkgcpus - 1) + 1); /* round up to power of 2 */
50 }
Kevin O'Connorbf7f1f32010-02-11 22:19:14 -050051 u8 apic_version = readl((u8*)BUILD_APIC_ADDR + 0x30) & 0xff;
Kevin O'Connorc0ad0e82009-11-09 19:20:21 -050052
Kevin O'Connor86916ce2009-11-14 13:34:27 -050053 // CPU definitions.
54 struct mpt_cpu *cpus = (void*)&config[1], *cpu = cpus;
55 int i;
56 for (i = 0; i < MaxCountCPUs; i+=pkgcpus) {
Kevin O'Connor35746442009-02-27 20:54:51 -050057 memset(cpu, 0, sizeof(*cpu));
58 cpu->type = MPT_TYPE_CPU;
59 cpu->apicid = i;
Magnus Christensson41c09572009-11-23 14:01:19 +010060 cpu->apicver = apic_version;
Kevin O'Connor35746442009-02-27 20:54:51 -050061 /* cpu flags: enabled, bootstrap cpu */
Kevin O'Connor9fd48512010-07-26 22:34:37 -040062 cpu->cpuflag = ((i<CountCPUs) ? 0x01 : 0x00) | ((i==0) ? 0x02 : 0x00);
Kevin O'Connorbf7f1f32010-02-11 22:19:14 -050063 cpu->cpusignature = cpuid_signature;
64 cpu->featureflag = cpuid_features;
Kevin O'Connor86916ce2009-11-14 13:34:27 -050065 cpu++;
Kevin O'Connor84ad59a2008-07-04 05:47:26 -040066 }
Kevin O'Connor86916ce2009-11-14 13:34:27 -050067 int entrycount = cpu - cpus;
Kevin O'Connorc0ad0e82009-11-09 19:20:21 -050068
Kevin O'Connor5c99b6c2009-12-30 12:36:22 -050069 // PCI buses
Kevin O'Connor34e9cc52010-06-06 11:07:08 -040070 struct mpt_bus *buses = (void*)cpu, *bus = buses;
Kevin O'Connor49f5ce52011-06-20 22:21:11 -040071 int lastbus = -1;
72 struct pci_device *pci;
73 foreachpci(pci) {
74 int curbus = pci_bdf_to_bus(pci->bdf);
Gleb Natapov4c94b7e2009-12-28 11:04:46 +020075 if (curbus == lastbus)
76 continue;
77 lastbus = curbus;
78 memset(bus, 0, sizeof(*bus));
79 bus->type = MPT_TYPE_BUS;
80 bus->busid = curbus;
81 memcpy(bus->bustype, "PCI ", sizeof(bus->bustype));
82 bus++;
Gleb Natapov4c94b7e2009-12-28 11:04:46 +020083 }
Kevin O'Connor84ad59a2008-07-04 05:47:26 -040084
Gleb Natapov4c94b7e2009-12-28 11:04:46 +020085 /* isa bus */
86 int isabusid;
Gleb Natapov928d4df2009-12-24 14:29:43 +020087 memset(bus, 0, sizeof(*bus));
88 bus->type = MPT_TYPE_BUS;
Gleb Natapov4c94b7e2009-12-28 11:04:46 +020089 isabusid = bus->busid = lastbus + 1;
90 memcpy(bus->bustype, "ISA ", sizeof(bus->bustype));
Kevin O'Connor34e9cc52010-06-06 11:07:08 -040091 bus++;
92 entrycount += bus - buses;
Gleb Natapov928d4df2009-12-24 14:29:43 +020093
Kevin O'Connor84ad59a2008-07-04 05:47:26 -040094 /* ioapic */
Kevin O'Connora26df9b2009-10-09 09:42:11 -040095 u8 ioapic_id = CountCPUs;
Kevin O'Connor34e9cc52010-06-06 11:07:08 -040096 struct mpt_ioapic *ioapic = (void*)bus;
Kevin O'Connor35746442009-02-27 20:54:51 -050097 memset(ioapic, 0, sizeof(*ioapic));
98 ioapic->type = MPT_TYPE_IOAPIC;
99 ioapic->apicid = ioapic_id;
100 ioapic->apicver = 0x11;
101 ioapic->flags = 1; // enable
102 ioapic->apicaddr = BUILD_IOAPIC_ADDR;
Kevin O'Connor86916ce2009-11-14 13:34:27 -0500103 entrycount++;
Kevin O'Connor84ad59a2008-07-04 05:47:26 -0400104
105 /* irqs */
Kevin O'Connor86916ce2009-11-14 13:34:27 -0500106 struct mpt_intsrc *intsrcs = (void*)&ioapic[1], *intsrc = intsrcs;
Gleb Natapov4c94b7e2009-12-28 11:04:46 +0200107 int dev = -1;
Kevin O'Connor5c99b6c2009-12-30 12:36:22 -0500108 unsigned short mask = 0, pinmask = 0;
Gleb Natapov928d4df2009-12-24 14:29:43 +0200109
Kevin O'Connor49f5ce52011-06-20 22:21:11 -0400110 foreachpci(pci) {
111 u16 bdf = pci->bdf;
Gleb Natapov928d4df2009-12-24 14:29:43 +0200112 int pin = pci_config_readb(bdf, PCI_INTERRUPT_PIN);
113 int irq = pci_config_readb(bdf, PCI_INTERRUPT_LINE);
114 if (pin == 0)
115 continue;
Kevin O'Connorb5bb9db2010-01-03 15:14:11 -0500116 if (dev != pci_bdf_to_busdev(bdf)) {
117 dev = pci_bdf_to_busdev(bdf);
Gleb Natapov928d4df2009-12-24 14:29:43 +0200118 pinmask = 0;
119 }
120 if (pinmask & (1 << pin)) /* pin was seen already */
121 continue;
122 pinmask |= (1 << pin);
123 mask |= (1 << irq);
Kevin O'Connorb64db302009-07-29 19:20:03 -0400124 memset(intsrc, 0, sizeof(*intsrc));
125 intsrc->type = MPT_TYPE_INTSRC;
Gleb Natapov928d4df2009-12-24 14:29:43 +0200126 intsrc->irqtype = 0; /* INT */
127 intsrc->irqflag = 1; /* active high */
Gleb Natapov4c94b7e2009-12-28 11:04:46 +0200128 intsrc->srcbus = pci_bdf_to_bus(bdf); /* PCI bus */
Kevin O'Connorb5bb9db2010-01-03 15:14:11 -0500129 intsrc->srcbusirq = (pci_bdf_to_dev(bdf) << 2) | (pin - 1);
Gleb Natapov928d4df2009-12-24 14:29:43 +0200130 intsrc->dstapic = ioapic_id;
131 intsrc->dstirq = irq;
132 intsrc++;
133 }
134
135 for (i = 0; i < 16; i++) {
136 memset(intsrc, 0, sizeof(*intsrc));
137 if (mask & (1 << i))
138 continue;
139 intsrc->type = MPT_TYPE_INTSRC;
140 intsrc->irqtype = 0; /* INT */
141 intsrc->irqflag = 0; /* conform to bus spec */
Gleb Natapov4c94b7e2009-12-28 11:04:46 +0200142 intsrc->srcbus = isabusid; /* ISA bus */
Kevin O'Connorb64db302009-07-29 19:20:03 -0400143 intsrc->srcbusirq = i;
144 intsrc->dstapic = ioapic_id;
145 intsrc->dstirq = i;
Kevin O'Connor4d2b6192009-10-08 21:37:21 -0400146 if (qemu_cfg_irq0_override()) {
Kevin O'Connorb64db302009-07-29 19:20:03 -0400147 /* Destination 2 is covered by irq0->inti2 override (i ==
148 0). Source IRQ 2 is unused */
149 if (i == 0)
150 intsrc->dstirq = 2;
151 else if (i == 2)
152 intsrc--;
153 }
154 intsrc++;
Kevin O'Connor84ad59a2008-07-04 05:47:26 -0400155 }
Kevin O'Connor84ad59a2008-07-04 05:47:26 -0400156
Kevin O'Connorb021a572009-11-14 13:49:06 -0500157 /* Local interrupt assignment */
158 intsrc->type = MPT_TYPE_LOCAL_INT;
159 intsrc->irqtype = 3; /* ExtINT */
160 intsrc->irqflag = 0; /* PO, EL default */
Gleb Natapov4c94b7e2009-12-28 11:04:46 +0200161 intsrc->srcbus = isabusid; /* ISA */
Kevin O'Connorb021a572009-11-14 13:49:06 -0500162 intsrc->srcbusirq = 0;
163 intsrc->dstapic = 0; /* BSP == APIC #0 */
164 intsrc->dstirq = 0; /* LINTIN0 */
165 intsrc++;
Kevin O'Connorb021a572009-11-14 13:49:06 -0500166
167 intsrc->type = MPT_TYPE_LOCAL_INT;
168 intsrc->irqtype = 1; /* NMI */
169 intsrc->irqflag = 0; /* PO, EL default */
Gleb Natapov4c94b7e2009-12-28 11:04:46 +0200170 intsrc->srcbus = isabusid; /* ISA */
Kevin O'Connorb021a572009-11-14 13:49:06 -0500171 intsrc->srcbusirq = 0;
Kenji Kaneshige55e28a42011-10-10 14:06:29 +0800172 intsrc->dstapic = 0xff; /* to all local APICs */
Kevin O'Connorb021a572009-11-14 13:49:06 -0500173 intsrc->dstirq = 1; /* LINTIN1 */
174 intsrc++;
Kevin O'Connor34e9cc52010-06-06 11:07:08 -0400175 entrycount += intsrc - intsrcs;
Kevin O'Connorb021a572009-11-14 13:49:06 -0500176
Kevin O'Connor86916ce2009-11-14 13:34:27 -0500177 // Finalize config structure.
Kevin O'Connor83626992009-12-26 11:15:31 -0500178 int length = (void*)intsrc - (void*)config;
Kevin O'Connor86916ce2009-11-14 13:34:27 -0500179 config->entrycount = entrycount;
Kevin O'Connor83626992009-12-26 11:15:31 -0500180 config->length = length;
181 config->checksum -= checksum(config, length);
182
Kevin O'Connor48cf2322010-01-04 20:49:45 -0500183 // Allocate final memory locations. (In theory the config
184 // structure can go in high memory, but Linux kernels before
185 // v2.6.30 crash with that.)
Kevin O'Connor83626992009-12-26 11:15:31 -0500186 struct mptable_config_s *finalconfig = malloc_fseg(length);
187 struct mptable_floating_s *floating = malloc_fseg(sizeof(*floating));
188 if (!finalconfig || !floating) {
Kevin O'Connorcfdc13f2010-02-14 13:07:54 -0500189 warn_noalloc();
Kevin O'Connor83626992009-12-26 11:15:31 -0500190 free(config);
191 free(finalconfig);
192 free(floating);
193 return;
194 }
195 memcpy(finalconfig, config, length);
196 free(config);
197
198 /* floating pointer structure */
199 memset(floating, 0, sizeof(*floating));
200 floating->signature = MPTABLE_SIGNATURE;
201 floating->physaddr = (u32)finalconfig;
202 floating->length = 1;
203 floating->spec_rev = 4;
204 floating->checksum -= checksum(floating, sizeof(*floating));
Kevin O'Connor84ad59a2008-07-04 05:47:26 -0400205
Kevin O'Connor2929c352009-07-25 13:48:27 -0400206 dprintf(1, "MP table addr=%p MPC table addr=%p size=%d\n",
Kevin O'Connor83626992009-12-26 11:15:31 -0500207 floating, finalconfig, length);
Kevin O'Connor84ad59a2008-07-04 05:47:26 -0400208}