From fafba296467b7398a97549a7d1f4dbf1552d6475 Mon Sep 17 00:00:00 2001 From: Nao Pross Date: Tue, 1 Aug 2017 01:32:37 +0200 Subject: filesystem structure intro and docs - new type pid_t and program management mechanism to make it easier to switch to a multitasking kernel - new memory related functions in memory.h to move, copy and manage pages - fix typos --- sw/z80/kernel/include/filesystem.h | 77 ++++++++++++++++++++++++++++++++++++++ 1 file changed, 77 insertions(+) create mode 100644 sw/z80/kernel/include/filesystem.h (limited to 'sw/z80/kernel/include/filesystem.h') diff --git a/sw/z80/kernel/include/filesystem.h b/sw/z80/kernel/include/filesystem.h new file mode 100644 index 0000000..6505d5e --- /dev/null +++ b/sw/z80/kernel/include/filesystem.h @@ -0,0 +1,77 @@ +#ifndef __FILESYSTEM_H__ +#define __FILESYSTEM_H__ + +#include "types.h" + +#define FS_OFFSET 0x1000 + +#define FS_BLOCK_SIZE 512 +#define FS_BLOCKS_N 12 +/* #define FS_IBLOCKS_N 1 */ + +#define INODE_TYPE_FILE 0 +#define INODE_TYPE_DIR 1 +#define INODE_TYPE_LINK 2 + +typedef struct time_s +{ + uint16_t time; + uint16_t date; +} time_t; + + +/* on-disk structures */ +struct fs_superblock +{ + uint8_t magic; + uint16_t blk_size; /* default is 512 bytes */ + uint16_t imap_size; /* size of the inode bitmap in blocks */ + uint16_t dmap_size; /* size of the data blocks map in blocks */ +}; + + +struct fs_blk +{ + uint size; +}; + +typedef struct fs_inode +{ + uint i_used :1; // inode is free + uint i_mode :3; // inode mode (rwx) + + uint8_t i_uid; // user (owner) id + uint16_t i_number; // identifier + + uint16_t i_blocks; // number of blocks + + struct fs_blk i_block[FS_BLOCKS_N]; // direct blocks +/* struct fs_blk i_iblock[FS_IBLOCKS_N]; // indirect blocks */ + + inode_t *parent; +} inode_t; + +/* inode table structures */ +struct fs_inode_entry +{ + uint16_t i_number; + uint8_t str_len; + char name[24]; +}; + +/* filesystem struct for the operating system */ +struct filesystem +{ + size_t size; + size_t fsize; + inode_t *mntpt; +}; + +void fs_parse_superblock(struct filesystem *fs); + +void fs_write_imap(); +void fs_write_dmap(); + +/* void fs_ */ + +#endif // __FILESYSTEM_H__ -- cgit v1.2.1