Began two-stage hdd bootloader and os installer

1 files changed, 23 insertions, 0 deletions

diff --git a/src/kernel/fs/marfs/disklevel.c b/src/kernel/fs/marfs/disklevel.c
new file mode 100644
index 0000000..b6fc8c2
--- /dev/null
+++ b/src/kernel/fs/marfs/disklevel.c
@@ -0,0 +1,23 @@
+#include <stdint.h>
+#include <kernel/fs/ata_pio.h>
+#include "marfs.h"
+
+void marfs_format(void) {
+    // Create superblock
+    struct marfs_SUPERBLOCK sb;
+    sb.signature = 0x1083B99F34B59645; // Huh, magic?!
+    sb.n_inodes = (marfs_get_max_lba() - 2) >> 5;
+    sb.n_chunks = (marfs_get_max_lba() - (2 + sb.n_inodes)) >> 9;
+    sb.n_first_unallocated_inode = 0;
+    sb.s_first_inode = 2;
+    sb.s_first_chunk = 2 + sb.n_inodes;
+
+    // Write to disk
+    marfs_writeSB(&sb);
+
+    // Initialize the inodes
+    for (uint32_t i = 0; i < sb.n_inodes; i++) ATA_clear28(iface, 2 + i);
+
+    // Initialize the chunks
+    for (uint32_t i = 0; i < sb.n_chunks; i++) ATA_clear28(iface, sb.s_first_chunk + i * 512);
+}