src/kernel/fs/marfs/disklevel.c


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#include <stdint.h>
#include <kernel/fs/ata_pio.h>
#include <kernel/fs/marfs/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);
}