diff options
Diffstat (limited to 'kernel/drivers')
| -rw-r--r-- | kernel/drivers/acpi.c | 21 |
1 files changed, 21 insertions, 0 deletions
diff --git a/kernel/drivers/acpi.c b/kernel/drivers/acpi.c index bcd0189..99e61c6 100644 --- a/kernel/drivers/acpi.c +++ b/kernel/drivers/acpi.c @@ -63,6 +63,19 @@ struct gas { uint64_t address; }; +struct mcfg { + struct acpi_header h; + uint8_t reserved[8]; + + struct mcfg_entry { + uint64_t base_address; // of enhanced configuration memory + uint16_t pci_segment_group_number; + uint8_t start_pci_number; + uint8_t end_pci_number; + uint8_t reserved[4]; + } __attribute__((packed)) entries[]; +} __attribute__((packed)); + // differentiated system description table struct dsdt { struct acpi_header h; @@ -162,6 +175,7 @@ struct acpi_state { struct apic *apic; struct hept *hept; struct waet *waet; + struct mcfg *mcfg; uint8_t version; uint16_t SLP_TYPa; @@ -249,6 +263,7 @@ static void acpi_load_xsdt_tables(struct xsdt *xsdt) #define SIG_APIC 0x43495041 #define SIG_HEPT 0x54455048 #define SIG_WAET 0x54454157 +#define SIG_MCFG 0x4746434d static void acpi_handle_table(struct acpi_header *header) { @@ -278,6 +293,9 @@ static void acpi_handle_table(struct acpi_header *header) case SIG_WAET: state.waet = (struct waet *)header; break; + case SIG_MCFG: + state.mcfg = (struct mcfg *)header; + break; default: break; } @@ -349,6 +367,9 @@ void acpi_report(void) if (state.waet) kprintf("%.*s: %#016lx\n", 4, (char *)&state.waet->h.signature, (uintptr_t)state.waet); + if (state.mcfg) + kprintf("%.*s: %#016lx\n", 4, (char *)&state.mcfg->h.signature, + (uintptr_t)state.mcfg); kprintf("\n"); } |