From 132d3236bb884433bf94e961f6d32264e0334aec Mon Sep 17 00:00:00 2001
From: ornitorrincos
Date: Tue, 18 Aug 2026 12:15:05 +0200
Subject: 

---
 kernel/acpi.h | 125 ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 125 insertions(+)
 create mode 100644 kernel/acpi.h

(limited to 'kernel/acpi.h')

diff --git a/kernel/acpi.h b/kernel/acpi.h
new file mode 100644
index 0000000..ec9eeaa
--- /dev/null
+++ b/kernel/acpi.h
@@ -0,0 +1,125 @@
+#pragma once
+
+#include <stdint.h>
+
+typedef struct __attribute__((packed))
+{
+    uint8_t signature[8];
+    uint8_t checksum;
+    uint8_t OEMID[6];
+    uint8_t revision;
+    uint32_t deprecated;
+    uint32_t length;
+    uint64_t xsdtaddress;
+    uint8_t extendedchecksum;
+    uint8_t reserved[3];
+} XSDP;
+
+typedef struct __attribute__((packed))
+{
+    uint8_t signature[4];
+    uint32_t length;
+    uint8_t revision;
+    uint8_t checksum;
+    uint8_t OEMID[6];
+    uint8_t OEMTableId[8];
+    uint32_t OEMRevision;
+    uint32_t creatorID;
+    uint32_t creatorrevision;
+} ACPISDTHeader;
+
+typedef struct __attribute__((packed))
+{
+    uint8_t siganture[4];
+    uint32_t length;
+    uint8_t revision;
+    uint8_t checksum;
+    uint8_t OEMID[6];
+    uint8_t OEMTableId[8];
+    uint32_t OEMRevision;
+    uint32_t creatorID;
+    uint32_t creatorrevision;
+
+    // APIC Fields
+    uint32_t l_ic_addr;
+    uint32_t flags;
+} APICHeader; // At 44 byte starts the variable part;
+
+typedef struct __attribute__((packed))
+{
+    uint8_t type;
+    uint8_t length;
+} APICEntry;
+
+typedef struct __attribute__((packed))
+{
+    uint8_t type;
+    uint8_t length;
+    uint8_t id;
+    uint8_t rsv;
+    uint32_t addr;
+    uint32_t si_base;
+} IOAPICTable;
+
+enum ACPI_TABLES
+{
+    APIC, // <- MADT
+    BGRT,
+    BERT,
+    CPEP,
+    DSDT,
+    ECDT,
+    EINJ,
+    ERST,
+    FACP, // <- FADT
+    FACS,
+    HEST,
+    MSCT,
+    MPST,
+    OEMx,
+    PMTT,
+    PSDT,
+    RASF,
+    RSDT,
+    SBST,
+    SLIT,
+    SRAT,
+    SSDT,
+    XSDT,
+    HPET,
+    NONE
+};
+
+enum APIC_TYPE
+{
+    LAPIC = 0,
+    IOAPIC = 1,
+    ISO = 2,
+    NMI_S = 3,
+    LAPIC_NMI = 4,
+    LAPIC_AO = 5,
+    IOSAPIC = 6,
+    LSAPIC = 7,
+    PIS = 8,
+    PLX2APIC = 9,
+    LX2APIC_NMI = 0xA,
+    GICC = 0xB,
+    GICD = 0xC,
+    GIC_MSI_FRAME = 0xD,
+    GICR = 0xE,
+    GIC_ITS = 0xF,
+    MP_WAKEUP = 0x10,
+    CORE_PIC = 0x11,
+    LIO_PIC = 0x12,
+    HT_PIC = 0x13,
+    EIO_PIC = 0x14,
+    MSI_PIC = 0x15,
+    BIO_PIC = 0x16,
+    LPC_PIC = 0x17,
+    RINTC = 0x18,
+    IMSIC = 0x19,
+    APLIC = 0x20,
+    PLIC = 0x21
+};
+
+void init_acpi(XSDP* xsdp);
-- 
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