From b7b97d32cbb6fbc928078ebe3a00714cbbebea86 Mon Sep 17 00:00:00 2001
From: EmulatedSeasons <89668582+EmulatedSeasons@users.noreply.github.com>
Date: Fri, 29 Dec 2023 01:38:34 -0500
Subject: got grub memory map and added to kernel printf

---
 kernel/arch/i386/multiboot.cpp | 29 +++++++++++++++++++++++++++++
 1 file changed, 29 insertions(+)
 create mode 100644 kernel/arch/i386/multiboot.cpp

(limited to 'kernel/arch/i386/multiboot.cpp')

diff --git a/kernel/arch/i386/multiboot.cpp b/kernel/arch/i386/multiboot.cpp
new file mode 100644
index 0000000..4ce94df
--- /dev/null
+++ b/kernel/arch/i386/multiboot.cpp
@@ -0,0 +1,29 @@
+#include <stdint.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include "multiboot.h"
+#include <arch/i386/tmtty.h>
+
+// gets the memory map and stuff
+extern "C" void multiboot_main(multiboot_info_t* mbd, uint32_t magic) {
+    terminal_initialize();
+    if (magic != MULTIBOOT_BOOTLOADER_MAGIC) {
+        printf("Invalid multiboot magic number\n");
+        abort();
+    }
+
+    // checks bit 6 to see if there's a valid memory map
+    if (!(mbd->flags >> 6 & 0x1)) {
+        printf("Invalid GRUB memory map\n");
+        abort();
+    }
+
+    // loop through memory map and display the values
+    for (int i = 0; i < mbd->mmap_length; i += sizeof(multiboot_memory_map_t)) {
+        multiboot_memory_map_t* mmmt = (multiboot_memory_map_t*)(mbd->mmap_addr + i);
+
+        printf("Start Addr: 0x%lx | Length: 0x%lx | Size: 0x%x | Type: %d\n", 
+        mmmt->addr, mmmt->len, mmmt->size, mmmt->type);
+        //printf("%lx,%x,%x,%d\n", mmmt->size, mmmt->size, mmmt->size, mmmt->size);
+    }
+}
\ No newline at end of file
-- 
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