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-rw-r--r--sw/z80/kernel/include/errno.h35
-rw-r--r--sw/z80/kernel/include/fs/dev.h29
-rw-r--r--sw/z80/kernel/include/fs/dirent.h14
-rw-r--r--sw/z80/kernel/include/fs/fd.h102
-rw-r--r--sw/z80/kernel/include/fs/fdop.h140
-rw-r--r--sw/z80/kernel/include/fs/fs.h80
-rw-r--r--sw/z80/kernel/include/fs/iter.h17
-rw-r--r--sw/z80/kernel/include/fs/mount.h15
-rw-r--r--sw/z80/kernel/include/fs/users.h15
-rw-r--r--sw/z80/kernel/include/memory.h2
-rw-r--r--sw/z80/kernel/include/sio.h42
-rw-r--r--sw/z80/kernel/include/stat.h24
-rw-r--r--sw/z80/kernel/include/types.h48
13 files changed, 473 insertions, 90 deletions
diff --git a/sw/z80/kernel/include/errno.h b/sw/z80/kernel/include/errno.h
new file mode 100644
index 0000000..7632269
--- /dev/null
+++ b/sw/z80/kernel/include/errno.h
@@ -0,0 +1,35 @@
+#ifndef ERRNO_H
+#define ERRNO_H
+
+extern int errno;
+
+#define EPERM 1 /* Operation not permitted */
+#define ENOENT 2 /* No such file or directory */
+#define ESRCH 3 /* No such process */
+#define EINTR 4 /* Interrupted system call */
+#define EIO 5 /* Input/output error */
+#define ENXIO 6 /* Device not configured */
+#define E2BIG 7 /* Argument list too long */
+#define ENOEXEC 8 /* Exec format error */
+#define EBADF 9 /* Bad file descriptor */
+#define ECHILD 10 /* No child processes */
+#define EDEADLK 11 /* Resource deadlock avoided */
+
+#define ENOMEM 12 /* Cannot allocate memory */
+#define EACCES 13 /* Permission denied */
+#define EFAULT 14 /* Bad address */
+
+#define ENOTBLK 15 /* Block device required */
+#define EBUSY 16 /* Device busy */
+#define EEXIST 17 /* File exists */
+
+#define EXDEV 18 /* Cross-device link */
+#define ENODEV 19 /* Operation not supported by device */
+#define ENOTDIR 20 /* Not a directory */
+#define EISDIR 21 /* Is a directory */
+#define EINVAL 22 /* Invalid argument */
+#define ENFILE 23 /* Too many open files in system */
+#define EMFILE 24 /* Too many open files */
+#define ENOTTY 25 /* Inappropriate ioctl for device */
+
+#endif
diff --git a/sw/z80/kernel/include/fs/dev.h b/sw/z80/kernel/include/fs/dev.h
new file mode 100644
index 0000000..8e550f3
--- /dev/null
+++ b/sw/z80/kernel/include/fs/dev.h
@@ -0,0 +1,29 @@
+#ifndef DEV_H
+#define DEV_H
+
+#include "types.h"
+
+#define FS_MOUNT_LIMIT 16
+
+struct fs_superblock
+{
+ uint8_t magic; // identifier
+
+ size_t blk_size; // size of a single block
+ size_t imap_size; // quantity of inodes
+ size_t dmap_size; // quantity of blocks
+};
+
+struct fs_dev
+{
+ uint enabled :1; // in use
+ uint port_no :3; // serial port number
+ uint :4;
+ inode_t inode; // dir mounted
+ struct fs_superblock superblock; // block informations
+};
+
+/* list of devices */
+extern struct fs_dev devices[FS_MOUNT_LIMIT];
+
+#endif
diff --git a/sw/z80/kernel/include/fs/dirent.h b/sw/z80/kernel/include/fs/dirent.h
index ea5699b..2fd224a 100644
--- a/sw/z80/kernel/include/fs/dirent.h
+++ b/sw/z80/kernel/include/fs/dirent.h
@@ -1,13 +1,17 @@
-#ifndef DIRENT_H
-#define DIRENT_H
+#ifndef __DIRENT_H__
+#define __DIRENT_H__
#include "types.h"
struct dirent
{
- ino_t i_number; // inode referred
+ ino_t inode; // inode referred
uint8_t name_size; // size of the name
char name[]; // name of the referred inode
-}
+};
-#endif
+/* if inode is FS_INO_NULL, then the dirent is a memory leak */
+/* Warning: dirent leaks are generated by rm or rmdir operations */
+/* Filesystem must be periodically checked and cleaned */
+
+#endif // __DIRENT_H__
diff --git a/sw/z80/kernel/include/fs/fd.h b/sw/z80/kernel/include/fs/fd.h
new file mode 100644
index 0000000..d2fea2a
--- /dev/null
+++ b/sw/z80/kernel/include/fs/fd.h
@@ -0,0 +1,102 @@
+#ifndef __FD_H__
+#define __FD_H__
+
+#include "types.h"
+
+#define FD_MAX 32
+
+#define OPEN_READ 0x1
+#define OPEN_WRITE 0x2
+#define OPEN_BIN 0x4
+#define OPEN_APPEND 0x8
+#define OPEN_ERASE 0x10
+#define OPEN_DIR 0x20
+#define OPEN_LINK 0x40
+
+#define LS_ALL 0x1
+
+/* declare dirent, not include */
+#ifndef __DIRENT_H__
+struct dirent;
+#endif
+
+/* set of operations callback for fd */
+struct fd_operations
+{
+ size_t (*readline)(inode_t, fsize_t, char *, char term);
+ size_t (*print)(inode_t, fsize_t, const char *);
+ size_t (*append)(inode_t, fsize_t*, const char *);
+
+ size_t (*read)(inode_t, fsize_t, void *, size_t);
+ size_t (*write)(inode_t, fsize_t, const void *, size_t);
+ size_t (*bin_append)(inode_t, fsize_t*, const void *, size_t);
+
+ size_t (*ls)(inode_t, struct dirent *, uint8_t);
+ size_t (*find)(inode_t, struct dirent *, const char *);
+ int8_t (*mkdir)(inode_t, const char *);
+ int8_t (*rmdir)(inode_t, const char *);
+ int8_t (*touch)(inode_t, const char *);
+ int8_t (*rm)(inode_t, const char *);
+ int8_t (*ln)(inode_t, const char *, const char *);
+
+ int8_t (*special)(inode_t, void *, size_t);
+};
+
+/* file descriptor */
+struct file_desc
+{
+ inode_t inode; // inode pointed
+ fsize_t seek; // virtual seek
+ devsize_t begin; // beginning of blocks
+ struct fd_operations opers; // bound operations
+};
+
+/* bitmap of used file descriptors */
+extern struct uint8_t fd_bmap[FD_TABLE_SIZE / 8];
+
+/* table of file descriptors */
+extern struct file_desc fd_table[FD_TABLE_SIZE];
+
+/* returns a free file descriptor */
+int8_t __fd_new();
+
+/* opens a file streaming of the cwd */
+int8_t __open_c_inode(uint8_t flags);
+
+/* opens a file streaming by a path */
+int8_t open(const char *path, uint8_t flags);
+
+/* list content of directory */
+size_t ls(int8_t fd, struct dirent *buf, uint8_t all);
+
+/* find name through the directory entries */
+size_t find(int8_t fd, struct dirent *buf, const char *name);
+
+/* creates a new directory inside fd with the specified name */
+int8_t mkdir(int8_t fd, const char *name);
+
+/* creates a new file inside fd with the specified name */
+int8_t touch(int8_t fd, const char *name);
+
+/* creates a new symlink inside fd with the specified name */
+int8_t ln(int8_t fd, const char *name);
+
+/* change virtual seek position of the fd */
+int8_t seek(int8_t fd, fsize_t pos);
+
+/* reads a string from the fd until the terminator is reached */
+size_t readline(int8_t fd, char *buf, char term);
+
+/* writes a string into the fd */
+int8_t print(int8_t fd, const char *str);
+
+/* reads n bytes from the fd */
+size_t read(int8_t fd, void *buf, size_t n);
+
+/* writes n bytes into the fd */
+int8_t write(int8_t fd, const void *buf, size_t n);
+
+/* frees fd space */
+void close(int8_t fd);
+
+#endif // __FD_H__
diff --git a/sw/z80/kernel/include/fs/fdop.h b/sw/z80/kernel/include/fs/fdop.h
new file mode 100644
index 0000000..d4b1b77
--- /dev/null
+++ b/sw/z80/kernel/include/fs/fdop.h
@@ -0,0 +1,140 @@
+#ifndef __FDOP_H__
+#define __FDOP_H__
+
+#include "types.h"
+
+#ifndef __DIRENT_H__
+struct dirent;
+#endif
+
+/* macro for direct binding */
+
+#define FD_BIND_AS_DIR(oper) { \
+ oper.ls = &as_ls; \
+ oper.find = &as_find; \
+ oper.mkdir = &as_mkdir; \
+ oper.rmdir = &as_rmdir; \
+ oper.touch = &as_touch; \
+ oper.rm = &as_rm; \
+ oper.ln = &as_ln; \
+ }
+
+#define FD_BIND_SS_DIR(oper) { \
+ oper.ls = &ss_ls; \
+ oper.find = &ss_find; \
+ oper.mkdir = &ss_mkdir; \
+ oper.rmdir = &ss_rmdir; \
+ oper.touch = &ss_touch; \
+ oper.rm = &ss_rm; \
+ oper.ln = &ss_ln; \
+ }
+
+#define FD_BIND_AS_FILE(opers, flags) { \
+ if (flags & OPEN_READ) \
+ opers.readline = as_readline; \
+ if (flags & OPEN_APPEND) \
+ opers.append = as_append; \
+ else if (flags & OPEN_WRITE) \
+ opers.print = as_print; \
+ }
+
+#define FD_BIND_SS_FILE(opers, flags) { \
+ if (flags & OPEN_READ) \
+ opers.readline = ss_readline; \
+ if (flags & OPEN_APPEND) \
+ opers.append = ss_append; \
+ else if (flags & OPEN_WRITE) \
+ opers.print = ss_print; \
+ }
+
+#define FD_BIND_AS_BINFILE(opers, flags) { \
+ if (flags & OPEN_READ) \
+ opers.read = as_read; \
+ if (flags & OPEN_APPEND) \
+ opers.bin_append = as_bin_append; \
+ else if (flags & OPEN_WRITE) \
+ opers.write = as_write; \
+ }
+
+#define FD_BIND_SS_BINFILE(opers, flags) { \
+ if (flags & OPEN_READ) \
+ opers.read = ss_read; \
+ if (flags & OPEN_APPEND) \
+ opers.bin_append = ss_bin_append; \
+ else if (flags & OPEN_WRITE) \
+ opers.write = ss_write; \
+ }
+
+/* Set of file descriptors operations */
+/* Determines if to use the serial interface or the address space */
+
+/* Address space section */
+
+/* File functions */
+
+size_t as_readline(inode_t inode, fsize_t seek, char *buf, char term);
+
+size_t as_print(inode_t inode, fsize_t seek, const char *str);
+
+size_t as_append(inode_t inode, fsize_t *seek_ptr, const char *str);
+
+
+size_t as_read(inode_t inode, fsize_t seek, void *buf, size_t n);
+
+size_t as_write(inode_t inode, fsize_t seek, const void *buf, size_t n);
+
+size_t as_bin_append(inode_t inode, fsize_t *seek_ptr, const void *buf, size_t
+n);
+
+/* Directory functions */
+
+size_t as_ls(inode_t inode, struct dirent *buf, uint8_t all);
+
+size_t as_find(inode_t inode, struct dirent *buf, const char *name);
+
+int8_t as_mkdir(inode_t inode, const char *name);
+
+int8_t as_rmdir(inode_t inode, const char *name);
+
+int8_t as_touch(inode_t inode, const char *name);
+
+int8_t as_rm(inode_t inode, const char *name);
+
+int8_t as_ln(inode_t inode, const char *path, const char *name);
+
+/* Serial Space section */
+/* Warning, it doesn't switch to the right driver */
+
+/* File functions */
+
+size_t ss_readline(inode_t inode, fsize_t seek, char *buf, char term);
+
+size_t ss_print(inode_t inode, fsize_t seek, const char *str);
+
+size_t ss_append(inode_t inode, fsize_t *seek_ptr, const char *str);
+
+
+size_t ss_read(inode_t inode, fsize_t seek, void *buf, size_t n);
+
+size_t ss_write(inode_t inode, fsize_t seek, const void *buf, size_t n);
+
+size_t ss_bin_append(inode_t inode, fsize_t *seek_ptr, const void *buf, size_t
+n);
+
+/* Directory functions */
+
+size_t ss_ls(inode_t inode, struct dirent *buf, uint8_t all);
+
+size_t ss_find(inode_t inode, struct dirent *buf, const char *name);
+
+int8_t ss_mkdir(inode_t inode, const char *name);
+
+int8_t ss_rmdir(inode_t inode, const char *name);
+
+int8_t ss_touch(inode_t inode, const char *name);
+
+int8_t ss_rm(inode_t inode, const char *name);
+
+int8_t ss_ln(inode_t, const char *path, const char *name);
+
+#endif // __FDOP_H__
diff --git a/sw/z80/kernel/include/fs/fs.h b/sw/z80/kernel/include/fs/fs.h
index 2a0e9d4..b92303d 100644
--- a/sw/z80/kernel/include/fs/fs.h
+++ b/sw/z80/kernel/include/fs/fs.h
@@ -1,5 +1,5 @@
-#ifndef INODE_H
-#define INODE_H
+#ifndef __FS_H__
+#define __FS_H__
#include "types.h"
@@ -11,57 +11,53 @@
#define INODE_TYPE_FILE 0x0
#define INODE_TYPE_DIR 0x1
-#define INODE_TYPE_HLINK 0x2
-#define INODE_TYPE_SLINK 0x3
+#define INODE_TYPE_SLINK 0x2
+#define INODE_TYPE_SPECIAL 0x3
-typedef struct time_s
+#define INODE_META_SIZE 8
+
+/* inode basic structure */
+struct fs_inode
{
- struct
- {
- uint minutes :6;
- uint hour :5;
+ /* inode meta data */
- } time;
+ uint mode :3; // chmod
+ uint uid :3; // chown
+ uint type :2; // file, dir, sym-link, special
- struct
- {
- uint day :5;
- uint month :4;
- uint year :12;
+ time_t ctime; // creation time
- } date;
+ uint24_t size; // inode size
-} time_t;
+ /* data storage informations */
+ /* it doesn't allocate memory, virtual size FS_BLOCKS_N */
+ blk_t blocks[];
+};
-struct fs_superblock
-{
- uint8_t magic; // identifier
+#define FS_DEV_ROM 0x7f /* 01111111 */
+#define FS_DEV_NULL 0x80 /* 10000000 */
- uint16_t blk_size; // size of a single block
- uint16_t imap_size; // quantity of inodes
- uint16_t dmap_size; // quantity of blocks
-}
+#define FS_ROM_SPACE 0x2000 // second rom
-struct fs_inode
-{
-
- /* inode meta data */
- uint mode :3; // chmod
- uint uid :3; // chown
- uint type :2; // file, dir, hard-link, sym-link
+#define FS_INO_ROOT 0x0 // first inode
- time_t ctime; // creation time
+#define FS_INODE_ROOT(inode) {inode.dev = 0xff; inode.inode = 0x0}
+#define FS_INODE_NULL(inode) {inode.dev = 0x80; inode.inode = 0x0}
- /* data storage informations */
- uint24_t size;
- uint16_t blocks[FS_BLOCKS_N];
+#define FS_USE_ROM(inode) inode.dev == 0x7f
-}
+/* get block seek in current device */
+devsize_t fs_block(blk_t block);
-struct fs_inumber
-{
- uint dev : 4; // device id, global in the fs
- ino_t rel; // inode id relative to the volume
-}
+/* get common inode seek in current device */
+/* c_inode must be set first */
+/* returns seek at the beginning of blocks field */
+devsize_t fs_inode(struct fs_inode *buf);
+
+/* common inode for syscalls */
+extern inode_t c_inode;
+
+/* parse a path, absolute or relative to c_inode */
+inode_t fs_parse_path(const char *path);
-#endif
+#endif // __FS_H__
diff --git a/sw/z80/kernel/include/fs/iter.h b/sw/z80/kernel/include/fs/iter.h
new file mode 100644
index 0000000..41f011d
--- /dev/null
+++ b/sw/z80/kernel/include/fs/iter.h
@@ -0,0 +1,17 @@
+#ifndef __ITER_H__
+#define __ITER_H__
+
+struct inode_iter
+{
+ devsize_t dev_seek; /* seek position in the volume */
+ devsize_t blk_end; /* end of the block */
+
+ int16_t blk_index; /* index of the block */
+
+ int8_t blk_level; /* recursion level, indirect blocks */
+
+ fsize_t fseek; /* virtual seek in the file */
+ fsize_t size; /* file size */
+};
+
+#endif // __ITER_H__
diff --git a/sw/z80/kernel/include/fs/mount.h b/sw/z80/kernel/include/fs/mount.h
deleted file mode 100644
index a0edd5d..0000000
--- a/sw/z80/kernel/include/fs/mount.h
+++ /dev/null
@@ -1,15 +0,0 @@
-#ifndef MOUNT_H
-#define MOUNT_H
-
-#include "fs.h"
-
-#define FS_MOUNT_LIMIT 16
-
-struct fs_mount_point
-{
- struct fs_inumber inode; // dir mounted
- uint serial_port :4;
- struct fs_superblock superblock; // block informations
-}
-
-#endif
diff --git a/sw/z80/kernel/include/fs/users.h b/sw/z80/kernel/include/fs/users.h
index 7e4016b..83980e5 100644
--- a/sw/z80/kernel/include/fs/users.h
+++ b/sw/z80/kernel/include/fs/users.h
@@ -1,6 +1,21 @@
#ifndef USERS_H
#define USERS_H
+#include "types.h"
+#define USERS_MAX 8
+#define USER_ROOT 0
+
+/* current user in use */
+extern struct fs_user c_user;
+
+struct fs_user
+{
+ char name[32];
+ ino_t home;
+ uint8_t perm; // TODO, permissions
+};
+
+/* all users are in rom device */
#endif
diff --git a/sw/z80/kernel/include/memory.h b/sw/z80/kernel/include/memory.h
index e4352b5..45fc325 100644
--- a/sw/z80/kernel/include/memory.h
+++ b/sw/z80/kernel/include/memory.h
@@ -45,4 +45,4 @@ int mmu_write_table(void);
int page_map(int page, int pid, uint16_t addr);
int page_unmap(int page);
-#endif // __MEMORY_H__ \ No newline at end of file
+#endif // __MEMORY_H__
diff --git a/sw/z80/kernel/include/sio.h b/sw/z80/kernel/include/sio.h
index 9dc47f6..2efd706 100644
--- a/sw/z80/kernel/include/sio.h
+++ b/sw/z80/kernel/include/sio.h
@@ -3,8 +3,7 @@
#include "types.h"
-#define SIO_ROM 0x0
-
+#define SIO_PORT_0 0x0
#define SIO_PORT_1 0x1
#define SIO_PORT_2 0x2
#define SIO_PORT_3 0x3
@@ -13,37 +12,32 @@
#define SIO_PORT_6 0x6
#define SIO_PORT_7 0x7
-/* initialize serial interface */
-void sio_init();
+/* current port in use */
+extern uint8_t sio_port;
-/* return the device address in the address space */
-void * sio_dev_addr(uint8_t dev);
-/* return the driver id to be used on dev */
-uint8_t sio_dev_driver(uint8_t dev);
+/* current seek in the device */
+extern devsize_t sio_seek;
-/* set current device in use */
-void sio_set_dev(uint8_t dev);
-/* get current device in use */
-uint8_t sio_cdev();
+struct dev_buffer
+{
+ // TODO, bytes needed to the device buffer interface
+};
-/* get pointer in given device */
-uint16_t sio_tellg(uint8_t dev);
-/* get pointer in current device */
-uint16_t sio_ctellg();
+/* points to the buffers mapped in the I/O space */
+/* to be defined precisely in assemly */
+extern volatile struct dev_buffer sio_buffers[8];
-/* set pointer in given device */
-int sio_seekg(uint8_t dev, uint16_t value);
-/* set pointer in current device */
-int sio_seekg(uint16_t value);
+/* initialize serial interface */
+void sio_init();
/* syscall: read one byte from the current device */
uint8_t sio_recv();
/* syscall: write one byte into the current device */
void sio_send(uint8_t value);
-/* read n bytes from the current device */
-char * sio_read(uint8_t *buffer, size_t n);
-/* write n bytes into the current device */
-int sio_write(const uint8_t *buffer, size_t n);
+/* read n bytes from the current port */
+size_t sio_read(void *buffer, size_t n);
+/* write n bytes into the current port */
+int8_t sio_write(const void *buffer, size_t n);
#endif
diff --git a/sw/z80/kernel/include/stat.h b/sw/z80/kernel/include/stat.h
new file mode 100644
index 0000000..cc5a7bf
--- /dev/null
+++ b/sw/z80/kernel/include/stat.h
@@ -0,0 +1,24 @@
+#ifndef STAT_H
+#define STAT_H
+
+struct stat
+{
+ dev_t dev; /* device id */
+ ino_t inumber; /* inode number inside the volume */
+
+ uint mode :3; /* mode */
+ uint uid :3; /* owner id */
+ uint type :2; /* file, dir or link */
+
+ devsize_t size; /* file size */
+
+ size_t blk_size; /* single block size */
+ size_t blk_used; /* blocks used by the file */
+
+ time_t ctime; /* creation time */
+}
+
+struct stat * stat(const char *path, struct stat *buffer);
+struct stat * lstat(const char *link, struct stat *buffer);
+
+#endif
diff --git a/sw/z80/kernel/include/types.h b/sw/z80/kernel/include/types.h
index b822144..c01afb2 100644
--- a/sw/z80/kernel/include/types.h
+++ b/sw/z80/kernel/include/types.h
@@ -10,15 +10,57 @@
#define int8_t char
#define uint8_t unsigned char
#define int16_t int
-#define uint16_t unsigned long int
+#define uint16_t unsigned short int
+
+#define uint32_t unsigned long int
#define size_t uint16_t
+#define ssize_t int16_t
#define pid_t uint8_t
#define ino_t uint16_t
-typedef struct {
- uint data : 24;
+#define dev_t uint8_t
+#define devsize_t uint32_t
+
+#define fd_t uint8_t
+
+#define blk_t uint16_t
+
+#define user_t int8_t
+
+typedef struct
+{
+ uint8_t member[3];
+
} uint24_t;
+#define fsize_t uint32_t
+
+typedef struct
+{
+ dev_t dev; // device id, global in the fs
+ ino_t inode; // inode id relative to the volume
+
+} inode_t;
+
+typedef struct time_s
+{
+ struct
+ {
+ uint minutes :6;
+ uint hour :5;
+
+ } time;
+
+ struct
+ {
+ uint day :5;
+ uint month :4;
+ uint year :12;
+
+ } date;
+
+} time_t;
+
#endif
generated by cgit v1.2.1 (git 2.18.0) at 2024-12-23 18:35:23 +0100