58 lines
983 B
PHP
58 lines
983 B
PHP
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;; File: xv6fs.inc
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;;
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;; Usefull links:
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;; - <https://github.com/mit-pdos/xv6-riscv/blob/riscv/kernel/fs.h>
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;; - <xv6 book at https://pdos.csail.mit.edu/6.1810/2023/xv6/book-riscv-rev3.pdf>
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XV6FS_BSIZE = 1024
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XV6FS_ROOTINO = 1
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XV6FS_MAGIC = 0x10203040
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XV6FS_NDIRECT = 12
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XV6FS_NINDIRECT = (XV6FS_BSIZE / 4)
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XV6FS_MAXFILE = (XV6FS_NDIRECT + XV6FS_NINDIRECT)
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XV6FS_IPB = (XV6FS_BSIZE / 64)
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XV6FS_DIRSIZE = 14
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struc Xv6FS_Sb {
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.magic dd ?
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.size dd ?
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.nblock dd ?
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.ninodes dd ?
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.nlog dd ?
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.nlogstart dd ?
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.inodestart dd ?
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.bmapstart dd ?
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}
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DEFN Xv6FS_Sb
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struc Xv6FS_Inode {
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.type dw ?
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.major dw ?
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.minor dw ?
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.nlink dw ?
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.size dd ?
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.addrs dd (XV6FS_NDIRECT + 1) dup(?)
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}
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DEFN Xv6FS_Inode
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struc Xv6FS_Dirent {
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.inum dw ?
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.name db XV6FS_DIRSIZE dup(?)
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}
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szVfsXv6FSName db 'xv6FS', 0
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vops_xv6fs:
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dd 0
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vfs_xv6fs:
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dd szVfsXv6FSName
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dd 0
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dd vops_xv6fs
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xv6fs_init:
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mov eax, vfs_xv6fs
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call vfs_register
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ret
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