| // MPTable generation (on emulators) |
| // |
| // Copyright (C) 2008 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 "memmap.h" // bios_table_cur_addr |
| #include "config.h" // CONFIG_* |
| #include "mptable.h" // MPTABLE_SIGNATURE |
| |
| void |
| mptable_init(void) |
| { |
| if (! CONFIG_MPTABLE) |
| return; |
| |
| dprintf(3, "init MPTable\n"); |
| |
| int smp_cpus = smp_probe(); |
| if (smp_cpus <= 1) |
| // Building an mptable on uniprocessor machines confuses some OSes. |
| return; |
| |
| u32 start = ALIGN(bios_table_cur_addr, 16); |
| int length = (sizeof(struct mptable_floating_s) |
| + sizeof(struct mptable_config_s) |
| + sizeof(struct mpt_cpu) * smp_cpus |
| + sizeof(struct mpt_bus) |
| + sizeof(struct mpt_ioapic) |
| + sizeof(struct mpt_intsrc) * 16); |
| if (start + length > bios_table_end_addr) { |
| dprintf(1, "No room for MPTABLE!\n"); |
| return; |
| } |
| bios_table_cur_addr = start + length; |
| |
| /* floating pointer structure */ |
| struct mptable_floating_s *floating = (void*)start; |
| memset(floating, 0, sizeof(*floating)); |
| struct mptable_config_s *config = (void*)&floating[1]; |
| 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->length = length - sizeof(*floating); |
| 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. |
| 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); |
| cpu->cpufeature = 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 *intsrcs = (void *)&ioapic[1]; |
| for(i = 0; i < 16; i++) { |
| struct mpt_intsrc *isrc = &intsrcs[i]; |
| memset(isrc, 0, sizeof(*isrc)); |
| isrc->type = MPT_TYPE_INTSRC; |
| isrc->srcbusirq = i; |
| isrc->dstapic = ioapic_id; |
| isrc->dstirq = i; |
| } |
| |
| // Set checksum. |
| config->checksum = -checksum(config, config->length); |
| |
| dprintf(1, "MP table addr=0x%x MPC table addr=0x%x size=0x%x\n", |
| (u32)floating, (u32)config, length); |
| } |