Parse multiboot information

src/kernel/include/memory.h

@@ -8,6 +8,7 @@
 #include <stdint.h>
 #define V2P(a) ((uintptr_t)(a) & ~KERNEL_OFFSET)
 #define P2V(a) ((void *)((uintptr_t)(a) | KERNEL_OFFSET))
+#define incptr(p, n) ((void *)(((uintptr_t)(p)) + (n)))
 #endif
 
 #define P1_OFFSET(a) (((a)>>12) & 0x1FF)

src/kernel/include/multiboot.h

@@ -0,0 +1,25 @@
+#pragma once
+#include <stdint.h>
+struct kernel_boot_data_st
+{
+  int multiboot_version;
+  char *bootloader;
+  char *commandline;
+};
+
+struct kernel_boot_data_st kernel_boot_data;
+
+struct mboot2_taglist{
+  uint32_t total_size;
+  uint32_t reserved;
+}__attribute__((packed));
+struct mboot2_tag {
+  uint32_t type;
+  uint32_t size;
+  uint8_t data[];
+}__attribute__((packed));
+
+#define MBOOT2_COMMANDLINE 1
+#define MBOOT2_BOOTLOADER 2
+
+int parse_multiboot(uint64_t magic, void *mboot_info);