[zion] Add ability to dump MADT (APIC) tables
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@ -34,6 +34,48 @@ struct SdtHeader {
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uint32_t creator_revision;
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} __attribute__((packed));
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struct MadtEntry {
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uint8_t type;
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uint8_t length;
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} __attribute__((packed));
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struct MadtLocalApic {
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MadtEntry entry;
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uint8_t processor_id;
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uint8_t apic_id;
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uint32_t flags;
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} __attribute__((packed));
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struct MadtIoApic {
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MadtEntry entry;
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uint8_t io_apic_id;
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uint8_t reserved;
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uint32_t io_apic_address;
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uint32_t global_system_interrupt_base;
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} __attribute__((packed));
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struct MadtIoApicInterruptSource {
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MadtEntry entry;
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uint8_t bus_source;
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uint8_t irq_source;
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uint32_t global_system_interrupt;
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uint16_t flags;
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} __attribute__((packed));
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struct MadtLocalApicNonMaskable {
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MadtEntry entry;
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uint8_t apic_processor_id;
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uint16_t flags;
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uint8_t lint_num;
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} __attribute__((packed));
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struct MadtHeader {
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SdtHeader sdt_headr;
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uint32_t local_apic_address;
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uint32_t flags;
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MadtEntry first_entry;
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} __attribute__((packed));
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bool streq(const char* a, const char* b, uint8_t len) {
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for (uint8_t i = 0; i < len; i++) {
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if (a[i] != b[i]) return false;
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@ -76,7 +118,7 @@ void ParseMcfg(SdtHeader* rsdt) {
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uint64_t bus_info = entries[2 * i + 1];
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if (bus_info != 0xff000000) {
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#if K_ACPI_DEBUG
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dbgln("WARN: Unexpected bus-info for PCI EC. Mem region will be wrong.")
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dbgln("WARN: Unexpected bus-info for PCI EC. Mem region will be wrong.");
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#endif
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}
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gPcieEcBase = base_ecm_addr;
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@ -91,6 +133,55 @@ void ParseMcfg(SdtHeader* rsdt) {
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}
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}
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void ParseMadt(SdtHeader* rsdt) {
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#if K_ACPI_DEBUG
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dbgsz(rsdt->signature, 4);
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#endif
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uint64_t max_addr = reinterpret_cast<uint64_t>(rsdt) + rsdt->length;
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MadtHeader* header = reinterpret_cast<MadtHeader*>(rsdt);
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dbgln("Local APIC %x", header->local_apic_address);
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dbgln("Flags: %x", header->flags);
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MadtEntry* entry = &header->first_entry;
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while (reinterpret_cast<uint64_t>(entry) < max_addr) {
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switch (entry->type) {
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case 0: {
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MadtLocalApic* local = reinterpret_cast<MadtLocalApic*>(entry);
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dbgln("Local APIC (Proc id, id, flags): %x, %x, %x",
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local->processor_id, local->apic_id, local->flags);
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break;
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}
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case 1: {
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MadtIoApic* io = reinterpret_cast<MadtIoApic*>(entry);
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dbgln("IO Apic (id, addr, gsi base): %x, %x, %x", io->io_apic_id,
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io->io_apic_address, io->global_system_interrupt_base);
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break;
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}
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case 2: {
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MadtIoApicInterruptSource* src =
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reinterpret_cast<MadtIoApicInterruptSource*>(entry);
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dbgln("IO Source (Bus, IRQ, GSI, flags): %x, %x, %x, %x",
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src->bus_source, src->irq_source, src->global_system_interrupt,
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src->flags);
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break;
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}
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case 4: {
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MadtLocalApicNonMaskable* lnmi =
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reinterpret_cast<MadtLocalApicNonMaskable*>(entry);
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dbgln("Local NMI (proc id, flags, lint#): %x, %x, %x",
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lnmi->apic_processor_id, lnmi->flags, lnmi->lint_num);
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break;
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}
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default:
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dbgln("Unhandled entry type: %u", entry->type);
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}
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entry = reinterpret_cast<MadtEntry*>(reinterpret_cast<uint64_t>(entry) +
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entry->length);
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}
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}
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void ParseSdt(SdtHeader* rsdt) {
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if (!checksum((uint8_t*)rsdt, rsdt->length)) {
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dbgln("Bad RSDT checksum.");
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@ -98,6 +189,8 @@ void ParseSdt(SdtHeader* rsdt) {
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}
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if (streq(rsdt->signature, "MCFG", 4)) {
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ParseMcfg(rsdt);
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} else if (streq(rsdt->signature, "APIC", 4)) {
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ParseMadt(rsdt);
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} else {
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#if K_ACPI_DEBUG
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dbgln("Unhandled:");
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