MAJOR RESTRUCTURE

2024-12-28 21:23:58 +01:00
parent 12b07a9f70
commit 2e0b030324
81 changed files with 1168 additions and 579 deletions
@@ -0,0 +1,61 @@
+#ifndef _MEMORY_ADDRESSES_H
+#define _MEMORY_ADDRESSES_H
+
+/*
+ * Memory layout of addresses 0x0000 - 0x12000
+ * 0x0000-0x0fff - Probably shouldn't mess with this? idk it feels wrong
+ * 0x1000-0x17ff - Free
+ * 0x1800-0x1fff - Global Variables
+ * 0x2000-0x2fff - Larger structs
+ * 0x3000-0x3fff - Filesystem Info
+ * 0x4000-0x4fff - Font area
+ * 0x6000-0x6fff - VBE info area
+ * 0x7000-0x7bff - SMAP Area
+ * 0x7c00-0x8bff - Bootblock
+ * 0x8c00-0x9bff - Superblock
+ * 0x9c00-0xafff - Free
+ * 0xb000-0xbfff - Bootloader first INode
+ * 0xc000-0xcfff - Scratch INode block
+ */
+
+// Global Variables 0x1800-0x1fff
+#define SLEEP_TIMER             0x1800
+#define CURRENT_PAGE_DIR_ADDR   0x1804
+#define PHYS_MEM_MAX_BLOCKS     0x1808
+#define PHYS_MEM_USED_BLOCKS    0x180C
+
+// Some structs 0x2000-0x2fff
+#define CONSOLE_INFO_LOC        0x2000
+#define KEYBOARD_STATE_LOC      0x2100
+#define DATETIME_LOC            0x2200
+
+// Filesystem Area 0x3000 - 0x3fff
+#define FS_INFO_LOC             0x3000
+
+// Font area 0x4000 - 0x4fff
+#define FONT_LOC                0x4000
+
+// VBE Info Area 0x6000 - 0x6fff
+#define MODE_INFO_BLOCK_LOC     0x6000 // 512 Bytes
+
+// Smap Area 0x7000 - 0x7bff
+#define SMAP_ENTRY_COUNT        0x7000
+#define SMAP_ENTRIES            0x7004
+
+// Bootblock 0x7c00-0x9bff
+#define BOOTBLOCK_LOC           0x7c00
+
+// Superblock 0x9c00-0xabff
+#define SUPERBLOCK_LOC          0x8c00
+
+// First INode from bootloader
+#define BOOT_FIRST_INODE_LOC    0xb000
+#define SCRATCH_BLOCK_LOC       0xc000
+
+// Other addresses
+#define KERNEL_LOC              0x100000
+#define KERNEL_MALLOC_AREA      0x300000
+#define MEMMAP_AREA             0x30000
+#define OPEN_FILE_LOC           0xd000
+
+#endif