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Kevin O'Connor84ad59a2008-07-04 05:47:26 -04001// MPTable generation (on emulators)
2//
Kevin O'Connor2929c352009-07-25 13:48:27 -04003// Copyright (C) 2008,2009 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.
24 struct mptable_config_s *config = malloc_tmphigh(32*1024);
25 if (!config) {
26 dprintf(1, "No space for temp mptable\n");
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'Connor86916ce2009-11-14 13:34:27 -050039 int pkgcpus = 1;
40 if (cpuid_features & (1 << 28)) {
41 /* Only populate the MPS tables with the first logical CPU in
42 each package */
43 pkgcpus = (ebx >> 16) & 0xff;
44 pkgcpus = 1 << (__fls(pkgcpus - 1) + 1); /* round up to power of 2 */
45 }
Kevin O'Connorc0ad0e82009-11-09 19:20:21 -050046
Kevin O'Connor86916ce2009-11-14 13:34:27 -050047 // CPU definitions.
48 struct mpt_cpu *cpus = (void*)&config[1], *cpu = cpus;
49 int i;
50 for (i = 0; i < MaxCountCPUs; i+=pkgcpus) {
Kevin O'Connor35746442009-02-27 20:54:51 -050051 memset(cpu, 0, sizeof(*cpu));
52 cpu->type = MPT_TYPE_CPU;
53 cpu->apicid = i;
54 cpu->apicver = 0x11;
55 /* cpu flags: enabled, bootstrap cpu */
Kevin O'Connor86916ce2009-11-14 13:34:27 -050056 cpu->cpuflag = (i < CountCPUs) | ((i == 0) << 1);
Kevin O'Connore97ca7b2009-06-21 09:10:28 -040057 if (cpuid_signature) {
58 cpu->cpusignature = cpuid_signature;
59 cpu->featureflag = cpuid_features;
60 } else {
61 cpu->cpusignature = 0x600;
62 cpu->featureflag = 0x201;
63 }
Kevin O'Connor86916ce2009-11-14 13:34:27 -050064 cpu++;
Kevin O'Connor84ad59a2008-07-04 05:47:26 -040065 }
Kevin O'Connor86916ce2009-11-14 13:34:27 -050066 int entrycount = cpu - cpus;
Kevin O'Connorc0ad0e82009-11-09 19:20:21 -050067
Kevin O'Connor84ad59a2008-07-04 05:47:26 -040068 /* isa bus */
Kevin O'Connor86916ce2009-11-14 13:34:27 -050069 struct mpt_bus *bus = (void*)cpu;
Kevin O'Connor35746442009-02-27 20:54:51 -050070 memset(bus, 0, sizeof(*bus));
71 bus->type = MPT_TYPE_BUS;
Gleb Natapov928d4df2009-12-24 14:29:43 +020072 bus->busid = 1;
Kevin O'Connor35746442009-02-27 20:54:51 -050073 memcpy(bus->bustype, "ISA ", sizeof(bus->bustype));
Kevin O'Connor86916ce2009-11-14 13:34:27 -050074 entrycount++;
Kevin O'Connor84ad59a2008-07-04 05:47:26 -040075
Gleb Natapov928d4df2009-12-24 14:29:43 +020076 bus++;
77 memset(bus, 0, sizeof(*bus));
78 bus->type = MPT_TYPE_BUS;
79 bus->busid = 0;
80 memcpy(bus->bustype, "PCI ", sizeof(bus->bustype));
81 entrycount++;
82
Kevin O'Connor84ad59a2008-07-04 05:47:26 -040083 /* ioapic */
Kevin O'Connora26df9b2009-10-09 09:42:11 -040084 u8 ioapic_id = CountCPUs;
Kevin O'Connor35746442009-02-27 20:54:51 -050085 struct mpt_ioapic *ioapic = (void*)&bus[1];
86 memset(ioapic, 0, sizeof(*ioapic));
87 ioapic->type = MPT_TYPE_IOAPIC;
88 ioapic->apicid = ioapic_id;
89 ioapic->apicver = 0x11;
90 ioapic->flags = 1; // enable
91 ioapic->apicaddr = BUILD_IOAPIC_ADDR;
Kevin O'Connor86916ce2009-11-14 13:34:27 -050092 entrycount++;
Kevin O'Connor84ad59a2008-07-04 05:47:26 -040093
94 /* irqs */
Kevin O'Connor86916ce2009-11-14 13:34:27 -050095 struct mpt_intsrc *intsrcs = (void*)&ioapic[1], *intsrc = intsrcs;
Gleb Natapov928d4df2009-12-24 14:29:43 +020096 int bdf, max, dev = -1;
97 unsigned short mask = 0, pinmask;
98
99 foreachpci(bdf, max) {
100 int pin = pci_config_readb(bdf, PCI_INTERRUPT_PIN);
101 int irq = pci_config_readb(bdf, PCI_INTERRUPT_LINE);
102 if (pin == 0)
103 continue;
104 if (dev != pci_bdf_to_dev(bdf)) {
105 dev = pci_bdf_to_dev(bdf);
106 pinmask = 0;
107 }
108 if (pinmask & (1 << pin)) /* pin was seen already */
109 continue;
110 pinmask |= (1 << pin);
111 mask |= (1 << irq);
Kevin O'Connorb64db302009-07-29 19:20:03 -0400112 memset(intsrc, 0, sizeof(*intsrc));
113 intsrc->type = MPT_TYPE_INTSRC;
Gleb Natapov928d4df2009-12-24 14:29:43 +0200114 intsrc->irqtype = 0; /* INT */
115 intsrc->irqflag = 1; /* active high */
116 intsrc->srcbus = 0; /* PCI bus */
117 intsrc->srcbusirq = (dev << 2) | (pin - 1);
118 intsrc->dstapic = ioapic_id;
119 intsrc->dstirq = irq;
120 intsrc++;
121 }
122
123 for (i = 0; i < 16; i++) {
124 memset(intsrc, 0, sizeof(*intsrc));
125 if (mask & (1 << i))
126 continue;
127 intsrc->type = MPT_TYPE_INTSRC;
128 intsrc->irqtype = 0; /* INT */
129 intsrc->irqflag = 0; /* conform to bus spec */
130 intsrc->srcbus = 1; /* ISA bus */
Kevin O'Connorb64db302009-07-29 19:20:03 -0400131 intsrc->srcbusirq = i;
132 intsrc->dstapic = ioapic_id;
133 intsrc->dstirq = i;
Kevin O'Connor4d2b6192009-10-08 21:37:21 -0400134 if (qemu_cfg_irq0_override()) {
Kevin O'Connorb64db302009-07-29 19:20:03 -0400135 /* Destination 2 is covered by irq0->inti2 override (i ==
136 0). Source IRQ 2 is unused */
137 if (i == 0)
138 intsrc->dstirq = 2;
139 else if (i == 2)
140 intsrc--;
141 }
142 intsrc++;
Kevin O'Connor84ad59a2008-07-04 05:47:26 -0400143 }
Kevin O'Connor86916ce2009-11-14 13:34:27 -0500144 entrycount += intsrc - intsrcs;
Kevin O'Connor84ad59a2008-07-04 05:47:26 -0400145
Kevin O'Connorb021a572009-11-14 13:49:06 -0500146 /* Local interrupt assignment */
147 intsrc->type = MPT_TYPE_LOCAL_INT;
148 intsrc->irqtype = 3; /* ExtINT */
149 intsrc->irqflag = 0; /* PO, EL default */
Gleb Natapov928d4df2009-12-24 14:29:43 +0200150 intsrc->srcbus = 1; /* ISA */
Kevin O'Connorb021a572009-11-14 13:49:06 -0500151 intsrc->srcbusirq = 0;
152 intsrc->dstapic = 0; /* BSP == APIC #0 */
153 intsrc->dstirq = 0; /* LINTIN0 */
154 intsrc++;
155 entrycount++;
156
157 intsrc->type = MPT_TYPE_LOCAL_INT;
158 intsrc->irqtype = 1; /* NMI */
159 intsrc->irqflag = 0; /* PO, EL default */
Gleb Natapov928d4df2009-12-24 14:29:43 +0200160 intsrc->srcbus = 1; /* ISA */
Kevin O'Connorb021a572009-11-14 13:49:06 -0500161 intsrc->srcbusirq = 0;
162 intsrc->dstapic = 0; /* BSP == APIC #0 */
163 intsrc->dstirq = 1; /* LINTIN1 */
164 intsrc++;
165 entrycount++;
166
Kevin O'Connor86916ce2009-11-14 13:34:27 -0500167 // Finalize config structure.
Kevin O'Connor83626992009-12-26 11:15:31 -0500168 int length = (void*)intsrc - (void*)config;
Kevin O'Connor86916ce2009-11-14 13:34:27 -0500169 config->entrycount = entrycount;
Kevin O'Connor83626992009-12-26 11:15:31 -0500170 config->length = length;
171 config->checksum -= checksum(config, length);
172
173 // Allocate final memory locations
174 struct mptable_config_s *finalconfig = malloc_fseg(length);
175 struct mptable_floating_s *floating = malloc_fseg(sizeof(*floating));
176 if (!finalconfig || !floating) {
177 dprintf(1, "No room for MPTABLE!\n");
178 free(config);
179 free(finalconfig);
180 free(floating);
181 return;
182 }
183 memcpy(finalconfig, config, length);
184 free(config);
185
186 /* floating pointer structure */
187 memset(floating, 0, sizeof(*floating));
188 floating->signature = MPTABLE_SIGNATURE;
189 floating->physaddr = (u32)finalconfig;
190 floating->length = 1;
191 floating->spec_rev = 4;
192 floating->checksum -= checksum(floating, sizeof(*floating));
Kevin O'Connor84ad59a2008-07-04 05:47:26 -0400193
Kevin O'Connor2929c352009-07-25 13:48:27 -0400194 dprintf(1, "MP table addr=%p MPC table addr=%p size=%d\n",
Kevin O'Connor83626992009-12-26 11:15:31 -0500195 floating, finalconfig, length);
Kevin O'Connor84ad59a2008-07-04 05:47:26 -0400196}