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[zion] Add ability to dump MADT (APIC) tables

This commit is contained in:
Drew Galbraith 2023-06-12 19:17:00 -07:00
parent 7cf54c0dd2
commit 8ac5366882
1 changed files with 94 additions and 1 deletions
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95
zion/boot/acpi.cpp
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@ -34,6 +34,48 @@ struct SdtHeader {
uint32_t creator_revision;
} __attribute__((packed));
struct MadtEntry {
uint8_t type;
uint8_t length;
} __attribute__((packed));
struct MadtLocalApic {
MadtEntry entry;
uint8_t processor_id;
uint8_t apic_id;
uint32_t flags;
} __attribute__((packed));
struct MadtIoApic {
MadtEntry entry;
uint8_t io_apic_id;
uint8_t reserved;
uint32_t io_apic_address;
uint32_t global_system_interrupt_base;
} __attribute__((packed));
struct MadtIoApicInterruptSource {
MadtEntry entry;
uint8_t bus_source;
uint8_t irq_source;
uint32_t global_system_interrupt;
uint16_t flags;
} __attribute__((packed));
struct MadtLocalApicNonMaskable {
MadtEntry entry;
uint8_t apic_processor_id;
uint16_t flags;
uint8_t lint_num;
} __attribute__((packed));
struct MadtHeader {
SdtHeader sdt_headr;
uint32_t local_apic_address;
uint32_t flags;
MadtEntry first_entry;
} __attribute__((packed));
bool streq(const char* a, const char* b, uint8_t len) {
for (uint8_t i = 0; i < len; i++) {
if (a[i] != b[i]) return false;
@ -76,7 +118,7 @@ void ParseMcfg(SdtHeader* rsdt) {
uint64_t bus_info = entries[2 * i + 1];
if (bus_info != 0xff000000) {
#if K_ACPI_DEBUG
dbgln("WARN: Unexpected bus-info for PCI EC. Mem region will be wrong.")
dbgln("WARN: Unexpected bus-info for PCI EC. Mem region will be wrong.");
#endif
}
gPcieEcBase = base_ecm_addr;
@ -91,6 +133,55 @@ void ParseMcfg(SdtHeader* rsdt) {
}
}
void ParseMadt(SdtHeader* rsdt) {
#if K_ACPI_DEBUG
dbgsz(rsdt->signature, 4);
#endif
uint64_t max_addr = reinterpret_cast<uint64_t>(rsdt) + rsdt->length;
MadtHeader* header = reinterpret_cast<MadtHeader*>(rsdt);
dbgln("Local APIC %x", header->local_apic_address);
dbgln("Flags: %x", header->flags);
MadtEntry* entry = &header->first_entry;
while (reinterpret_cast<uint64_t>(entry) < max_addr) {
switch (entry->type) {
case 0: {
MadtLocalApic* local = reinterpret_cast<MadtLocalApic*>(entry);
dbgln("Local APIC (Proc id, id, flags): %x, %x, %x",
local->processor_id, local->apic_id, local->flags);
break;
}
case 1: {
MadtIoApic* io = reinterpret_cast<MadtIoApic*>(entry);
dbgln("IO Apic (id, addr, gsi base): %x, %x, %x", io->io_apic_id,
io->io_apic_address, io->global_system_interrupt_base);
break;
}
case 2: {
MadtIoApicInterruptSource* src =
reinterpret_cast<MadtIoApicInterruptSource*>(entry);
dbgln("IO Source (Bus, IRQ, GSI, flags): %x, %x, %x, %x",
src->bus_source, src->irq_source, src->global_system_interrupt,
src->flags);
break;
}
case 4: {
MadtLocalApicNonMaskable* lnmi =
reinterpret_cast<MadtLocalApicNonMaskable*>(entry);
dbgln("Local NMI (proc id, flags, lint#): %x, %x, %x",
lnmi->apic_processor_id, lnmi->flags, lnmi->lint_num);
break;
}
default:
dbgln("Unhandled entry type: %u", entry->type);
}
entry = reinterpret_cast<MadtEntry*>(reinterpret_cast<uint64_t>(entry) +
entry->length);
}
}
void ParseSdt(SdtHeader* rsdt) {
if (!checksum((uint8_t*)rsdt, rsdt->length)) {
dbgln("Bad RSDT checksum.");
@ -98,6 +189,8 @@ void ParseSdt(SdtHeader* rsdt) {
}
if (streq(rsdt->signature, "MCFG", 4)) {
ParseMcfg(rsdt);
} else if (streq(rsdt->signature, "APIC", 4)) {
ParseMadt(rsdt);
} else {
#if K_ACPI_DEBUG
dbgln("Unhandled:");