feat: setup structure for block devices

added ide block device added mbr block device driver started fat block device driver reordered boot start timer before pci/ide/etc. enable interrupts earlier fixed exception from ide controller cleanup code more printfs
2021-02-09 22:47:35 +01:00
parent 9440fae968
commit 2ac0da6574
16 changed files with 467 additions and 106 deletions
--- a/kernel/fs/fat.c
+++ b/kernel/fs/fat.c
@@ -0,0 +1,53 @@
+//
+// Created by rick on 07-02-21.
+//
+
+#include "fat.h"
+
+#include <types.h>
+
+typedef struct {
+    struct {
+        u8 jump[3];
+        char oem_identifier[8];
+        u16 bytes_per_sector;
+        u8 sectors_per_cluster;
+        u16 reserved_sectors;
+        u8 fats;
+        u16 directories;
+        u16 total_sectors;
+        u8 media_descriptor;
+        u16 sectors_per_fat;
+        u16 sectors_per_track;
+        u16 heads_sides;
+        u32 hidden_sectors;
+        u32 large_sector_count;
+    } bpb;
+    union {
+        struct {
+            u8 drive_number;
+            u8 flags;
+            u8 signature;
+            u32 serial;
+            u8 label[11];
+            u8 system_id[8];
+        } ebr_12_16;
+        struct {
+            u32 sectors_per_fat;
+            u16 flags;
+            u16 fat_version;
+            u32 root_directory;
+            u16 fs_info;
+            u16 backup_boot;
+            u8 reserved[12];
+            u8 drive_number;
+            u8 flags_nt;
+            u8 signature;
+            u32 serial;
+            u8 label[11];
+            u8 system_id[8];
+        } ebr_32;
+    };
+} fat_bpb;
+
+// steal validation code from here https://github.com/torvalds/linux/blob/fcadab740480e0e0e9fa9bd272acd409884d431a/fs/fat/inode.c#L1456