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1.1 root 1: // MPTable generation (on emulators)
2: //
3: // Copyright (C) 2008,2009 Kevin O'Connor <[email protected]>
4: // Copyright (C) 2006 Fabrice Bellard
5: //
6: // This file may be distributed under the terms of the GNU LGPLv3 license.
7:
8: #include "util.h" // dprintf
9: #include "config.h" // CONFIG_*
10: #include "mptable.h" // MPTABLE_SIGNATURE
11: #include "paravirt.h" // qemu_cfg_irq0_override
12:
13: void
14: mptable_init(void)
15: {
16: if (! CONFIG_MPTABLE)
17: return;
18:
19: dprintf(3, "init MPTable\n");
20:
21: // Allocate memory
22: int length = (sizeof(struct mptable_config_s)
23: + sizeof(struct mpt_cpu) * MaxCountCPUs
24: + sizeof(struct mpt_bus)
25: + sizeof(struct mpt_ioapic)
26: + sizeof(struct mpt_intsrc) * 18);
27: struct mptable_config_s *config = malloc_fseg(length);
28: struct mptable_floating_s *floating = malloc_fseg(sizeof(*floating));
29: if (!config || !floating) {
30: dprintf(1, "No room for MPTABLE!\n");
31: free(config);
32: free(floating);
33: return;
34: }
35:
36: /* floating pointer structure */
37: memset(floating, 0, sizeof(*floating));
38: floating->signature = MPTABLE_SIGNATURE;
39: floating->physaddr = (u32)config;
40: floating->length = 1;
41: floating->spec_rev = 4;
42: floating->checksum -= checksum(floating, sizeof(*floating));
43:
44: // Config structure.
45: memset(config, 0, sizeof(*config));
46: config->signature = MPCONFIG_SIGNATURE;
47: config->spec = 4;
48: memcpy(config->oemid, CONFIG_CPUNAME8, sizeof(config->oemid));
49: memcpy(config->productid, "0.1 ", sizeof(config->productid));
50: config->lapic = BUILD_APIC_ADDR;
51:
52: // Detect cpu info
53: u32 cpuid_signature, ebx, ecx, cpuid_features;
54: cpuid(1, &cpuid_signature, &ebx, &ecx, &cpuid_features);
55: int pkgcpus = 1;
56: if (cpuid_features & (1 << 28)) {
57: /* Only populate the MPS tables with the first logical CPU in
58: each package */
59: pkgcpus = (ebx >> 16) & 0xff;
60: pkgcpus = 1 << (__fls(pkgcpus - 1) + 1); /* round up to power of 2 */
61: }
62:
63: // CPU definitions.
64: struct mpt_cpu *cpus = (void*)&config[1], *cpu = cpus;
65: int i;
66: for (i = 0; i < MaxCountCPUs; i+=pkgcpus) {
67: memset(cpu, 0, sizeof(*cpu));
68: cpu->type = MPT_TYPE_CPU;
69: cpu->apicid = i;
70: cpu->apicver = 0x11;
71: /* cpu flags: enabled, bootstrap cpu */
72: cpu->cpuflag = (i < CountCPUs) | ((i == 0) << 1);
73: if (cpuid_signature) {
74: cpu->cpusignature = cpuid_signature;
75: cpu->featureflag = cpuid_features;
76: } else {
77: cpu->cpusignature = 0x600;
78: cpu->featureflag = 0x201;
79: }
80: cpu++;
81: }
82: int entrycount = cpu - cpus;
83:
84: /* isa bus */
85: struct mpt_bus *bus = (void*)cpu;
86: memset(bus, 0, sizeof(*bus));
87: bus->type = MPT_TYPE_BUS;
88: memcpy(bus->bustype, "ISA ", sizeof(bus->bustype));
89: entrycount++;
90:
91: /* ioapic */
92: u8 ioapic_id = CountCPUs;
93: struct mpt_ioapic *ioapic = (void*)&bus[1];
94: memset(ioapic, 0, sizeof(*ioapic));
95: ioapic->type = MPT_TYPE_IOAPIC;
96: ioapic->apicid = ioapic_id;
97: ioapic->apicver = 0x11;
98: ioapic->flags = 1; // enable
99: ioapic->apicaddr = BUILD_IOAPIC_ADDR;
100: entrycount++;
101:
102: /* irqs */
103: struct mpt_intsrc *intsrcs = (void*)&ioapic[1], *intsrc = intsrcs;
104: for (i = 0; i < 16; i++) {
105: memset(intsrc, 0, sizeof(*intsrc));
106: intsrc->type = MPT_TYPE_INTSRC;
107: intsrc->srcbusirq = i;
108: intsrc->dstapic = ioapic_id;
109: intsrc->dstirq = i;
110: if (qemu_cfg_irq0_override()) {
111: /* Destination 2 is covered by irq0->inti2 override (i ==
112: 0). Source IRQ 2 is unused */
113: if (i == 0)
114: intsrc->dstirq = 2;
115: else if (i == 2)
116: intsrc--;
117: }
118: intsrc++;
119: }
120: entrycount += intsrc - intsrcs;
121:
122: /* Local interrupt assignment */
123: intsrc->type = MPT_TYPE_LOCAL_INT;
124: intsrc->irqtype = 3; /* ExtINT */
125: intsrc->irqflag = 0; /* PO, EL default */
126: intsrc->srcbus = 0;
127: intsrc->srcbusirq = 0;
128: intsrc->dstapic = 0; /* BSP == APIC #0 */
129: intsrc->dstirq = 0; /* LINTIN0 */
130: intsrc++;
131: entrycount++;
132:
133: intsrc->type = MPT_TYPE_LOCAL_INT;
134: intsrc->irqtype = 1; /* NMI */
135: intsrc->irqflag = 0; /* PO, EL default */
136: intsrc->srcbus = 0;
137: intsrc->srcbusirq = 0;
138: intsrc->dstapic = 0; /* BSP == APIC #0 */
139: intsrc->dstirq = 1; /* LINTIN1 */
140: intsrc++;
141: entrycount++;
142:
143: // Finalize config structure.
144: config->entrycount = entrycount;
145: config->length = (void*)intsrc - (void*)config;
146: config->checksum -= checksum(config, config->length);
147:
148: dprintf(1, "MP table addr=%p MPC table addr=%p size=%d\n",
149: floating, config, config->length);
150: }
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