| // MPTable generation (on emulators) |
| // |
| // Copyright (C) 2008,2009 Kevin O'Connor <kevin@koconnor.net> |
| // Copyright (C) 2006 Fabrice Bellard |
| // |
| // This file may be distributed under the terms of the GNU LGPLv3 license. |
| |
| #include "util.h" // dprintf |
| #include "config.h" // CONFIG_* |
| #include "mptable.h" // MPTABLE_SIGNATURE |
| |
| #if CONFIG_KVM |
| int irq0override = 1; |
| #else |
| int irq0override = 0; |
| #endif |
| |
| void |
| mptable_init(void) |
| { |
| if (! CONFIG_MPTABLE) |
| return; |
| |
| dprintf(3, "init MPTable\n"); |
| |
| int smp_cpus = CountCPUs; |
| if (smp_cpus <= 1) |
| // Building an mptable on uniprocessor machines confuses some OSes. |
| return; |
| |
| int length = (sizeof(struct mptable_config_s) |
| + sizeof(struct mpt_cpu) * smp_cpus |
| + sizeof(struct mpt_bus) |
| + sizeof(struct mpt_ioapic) |
| + sizeof(struct mpt_intsrc) * 16); |
| struct mptable_config_s *config = malloc_fseg(length); |
| struct mptable_floating_s *floating = malloc_fseg(sizeof(*floating)); |
| if (!config || !floating) { |
| dprintf(1, "No room for MPTABLE!\n"); |
| return; |
| } |
| |
| /* floating pointer structure */ |
| memset(floating, 0, sizeof(*floating)); |
| floating->signature = MPTABLE_SIGNATURE; |
| floating->physaddr = (u32)config; |
| floating->length = 1; |
| floating->spec_rev = 4; |
| floating->checksum -= checksum(floating, sizeof(*floating)); |
| |
| // Config structure. |
| memset(config, 0, sizeof(*config)); |
| config->signature = MPCONFIG_SIGNATURE; |
| config->spec = 4; |
| memcpy(config->oemid, CONFIG_CPUNAME8, sizeof(config->oemid)); |
| memcpy(config->productid, "0.1 ", sizeof(config->productid)); |
| config->entrycount = smp_cpus + 2 + 16; |
| config->lapic = BUILD_APIC_ADDR; |
| |
| // CPU definitions. |
| u32 cpuid_signature, ebx, ecx, cpuid_features; |
| cpuid(1, &cpuid_signature, &ebx, &ecx, &cpuid_features); |
| struct mpt_cpu *cpus = (void*)&config[1]; |
| int i; |
| for (i = 0; i < smp_cpus; i++) { |
| struct mpt_cpu *cpu = &cpus[i]; |
| memset(cpu, 0, sizeof(*cpu)); |
| cpu->type = MPT_TYPE_CPU; |
| cpu->apicid = i; |
| cpu->apicver = 0x11; |
| /* cpu flags: enabled, bootstrap cpu */ |
| cpu->cpuflag = (i == 0 ? 3 : 1); |
| if (cpuid_signature) { |
| cpu->cpusignature = cpuid_signature; |
| cpu->featureflag = cpuid_features; |
| } else { |
| cpu->cpusignature = 0x600; |
| cpu->featureflag = 0x201; |
| } |
| } |
| |
| /* isa bus */ |
| struct mpt_bus *bus = (void*)&cpus[smp_cpus]; |
| memset(bus, 0, sizeof(*bus)); |
| bus->type = MPT_TYPE_BUS; |
| memcpy(bus->bustype, "ISA ", sizeof(bus->bustype)); |
| |
| /* ioapic */ |
| u8 ioapic_id = smp_cpus; |
| struct mpt_ioapic *ioapic = (void*)&bus[1]; |
| memset(ioapic, 0, sizeof(*ioapic)); |
| ioapic->type = MPT_TYPE_IOAPIC; |
| ioapic->apicid = ioapic_id; |
| ioapic->apicver = 0x11; |
| ioapic->flags = 1; // enable |
| ioapic->apicaddr = BUILD_IOAPIC_ADDR; |
| |
| /* irqs */ |
| struct mpt_intsrc *intsrc = (void*)&ioapic[1]; |
| for (i = 0; i < 16; i++) { |
| memset(intsrc, 0, sizeof(*intsrc)); |
| intsrc->type = MPT_TYPE_INTSRC; |
| intsrc->srcbusirq = i; |
| intsrc->dstapic = ioapic_id; |
| intsrc->dstirq = i; |
| if (irq0override) { |
| /* Destination 2 is covered by irq0->inti2 override (i == |
| 0). Source IRQ 2 is unused */ |
| if (i == 0) |
| intsrc->dstirq = 2; |
| else if (i == 2) |
| intsrc--; |
| } |
| intsrc++; |
| } |
| |
| // Set checksum. |
| config->length = (void*)intsrc - (void*)config; |
| config->checksum -= checksum(config, config->length); |
| |
| dprintf(1, "MP table addr=%p MPC table addr=%p size=%d\n", |
| floating, config, config->length); |
| } |