[MODERN FEATURES] ACPI tables

kernel/include/acpi.h

@@ -0,0 +1,63 @@
+#pragma once
+#include <stdint.h>
+
+typedef struct RSDP_st
+{
+  unsigned char signature[8];
+  uint8_t checksum;
+  unsigned char OEMID[6];
+  uint8_t revision;
+  uint32_t RSDT_p;
+  // The following are only available if revision != 0
+  uint32_t length;
+  uint64_t XSDT_p;
+  uint8_t checksum2;
+  uint8_t reserved[3];
+}__attribute__ ((packed)) RSDP_st;
+
+typedef struct SDT_header
+{
+  unsigned char signature[4];
+  uint32_t length;
+  uint8_t revision;
+  uint8_t checksum;
+  unsigned char OEMID[6];
+  unsigned char OEMtable[8];
+  uint32_t OEMrevision;
+  uint32_t CreatorID;
+  uint32_t CreatorRevision;
+  uint8_t data[];
+}__attribute__ ((packed)) SDT_header;
+
+typedef struct MADT_header
+{
+  uint32_t LCA;
+  uint32_t flags;
+  uint8_t fields[];
+}__attribute__((packed)) MADT_header;
+typedef struct MADT_field
+{
+  uint8_t type;
+  uint8_t length;
+  union{
+    struct{
+      uint8_t proc_ID;
+      uint8_t APIC_ID;
+      uint32_t flags;
+    }__attribute__((packed)) proc;
+    struct {
+      uint8_t APIC_ID;
+      uint8_t reserved;
+      uint32_t address;
+      uint32_t base;
+    }__attribute__((packed)) IOAPIC;
+    struct {
+      uint8_t bus;
+      uint8_t irq;
+      uint32_t interrupt;
+      uint16_t flags;
+    }__attribute__((packed)) ISO;
+  };
+}__attribute__((packed)) MADT_field;
+
+void acpi_init();

kernel/include/multiboot.h

@@ -80,6 +80,8 @@ typedef struct {
   #define MBOOT2_CMDLINE 1
   #define MBOOT2_BOOTLOADER 2
   #define MBOOT2_MMAP 6
+  #define MBOOT2_ACPI_V1 14
+  #define MBOOT2_ACPI_V2 15
 
   // Multiboot tags are padded to a multiple of 8 bytes
   #define next_tag(tag) ((void *)((((uintptr_t)tag) + tag->size + 7) & ~0x7))
@@ -92,6 +94,7 @@ typedef struct {
     char *bootloader;
     void *mmap;
     uint32_t mmap_size;
+    void *rsdp;
   };
   extern struct mboot_data_st mboot_data;