Move sw to sw-old and hw to hw-altium, add kicad files

14 files changed, 661 insertions, 0 deletions

diff --git a/sw-old/z80/kernel/include/devices.h b/sw-old/z80/kernel/include/devices.h
new file mode 100644
index 0000000..a846f9b
--- /dev/null
+++ b/sw-old/z80/kernel/include/devices.h
@@ -0,0 +1,15 @@
+#ifndef __DEVICES_H__
+#define __DEVICES_H__
+
+#define ADDR_DEV_ROM_L      0x0000
+#define ADDR_DEV_ROM_H      0x2000
+
+#define ADDR_DEV_USART      0x4000
+#define ADDR_DEV_CTC        0x4100
+#define ADDR_DEV_PIO        0x4200
+
+#define ADDR_DEV_MMU
+
+#define ADDR_DEV_RAM        0x8000
+
+#endif
diff --git a/sw-old/z80/kernel/include/errno.h b/sw-old/z80/kernel/include/errno.h
new file mode 100644
index 0000000..7632269
--- /dev/null
+++ b/sw-old/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-old/z80/kernel/include/fs/dev.h b/sw-old/z80/kernel/include/fs/dev.h
new file mode 100644
index 0000000..8e550f3
--- /dev/null
+++ b/sw-old/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-old/z80/kernel/include/fs/dirent.h b/sw-old/z80/kernel/include/fs/dirent.h
new file mode 100644
index 0000000..2fd224a
--- /dev/null
+++ b/sw-old/z80/kernel/include/fs/dirent.h
@@ -0,0 +1,17 @@
+#ifndef __DIRENT_H__
+#define __DIRENT_H__
+
+#include "types.h"
+
+struct dirent
+{
+    ino_t       inode;       // inode referred
+    uint8_t     name_size;    // size of the name
+    char        name[];         // name of the referred inode
+};
+
+/* 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-old/z80/kernel/include/fs/fd.h b/sw-old/z80/kernel/include/fs/fd.h
new file mode 100644
index 0000000..d2fea2a
--- /dev/null
+++ b/sw-old/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-old/z80/kernel/include/fs/fdop.h b/sw-old/z80/kernel/include/fs/fdop.h
new file mode 100644
index 0000000..d4b1b77
--- /dev/null
+++ b/sw-old/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-old/z80/kernel/include/fs/fs.h b/sw-old/z80/kernel/include/fs/fs.h
new file mode 100644
index 0000000..ad20adb
--- /dev/null
+++ b/sw-old/z80/kernel/include/fs/fs.h
@@ -0,0 +1,63 @@
+#ifndef __FS_H__
+#define __FS_H__
+
+#include "types.h"
+
+#define FS_OFFSET 0x1000
+
+#define FS_BLOCKS_SIZE 512
+#define FS_BLOCKS_N     8
+#define FS_BLOCKS_IND   6
+
+#define INODE_TYPE_FILE   0x0
+#define INODE_TYPE_DIR    0x1
+#define INODE_TYPE_SLINK    0x2
+#define INODE_TYPE_SPECIAL  0x3
+
+#define INODE_META_SIZE 8
+
+/* inode basic structure */
+struct fs_inode
+{
+    /* inode meta data */
+
+    uint        mode :3;  // chmod
+    uint        uid :3;   // chown
+    uint        type :2;  // file, dir, sym-link, special
+
+    time_t      ctime;          // creation time
+
+    uint24_t     size;              // inode size
+
+    /* data storage informations */
+    /* it doesn't allocate memory, virtual size FS_BLOCKS_N */ 
+    blk_t     blocks[];
+};
+
+#define FS_DEV_ROM      0x7f    /* 01111111 */
+#define FS_DEV_NULL     0x80    /* 10000000 */
+
+#define FS_ROM_SPACE    0x2000  // second rom 
+
+#define FS_INO_ROOT   0x0       // first inode
+
+#define FS_INODE_ROOT(inode)   {inode.dev = 0xff; inode.inode = 0x0}
+#define FS_INODE_NULL(inode)   {inode.dev = 0x80; inode.inode = 0x0}
+
+#define FS_USE_ROM(inode)   {inode.dev == 0x7f}
+
+/* get block seek in current device */
+devsize_t fs_block(blk_t block);
+
+/* 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  // __FS_H__
diff --git a/sw-old/z80/kernel/include/fs/iter.h b/sw-old/z80/kernel/include/fs/iter.h
new file mode 100644
index 0000000..41f011d
--- /dev/null
+++ b/sw-old/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-old/z80/kernel/include/fs/users.h b/sw-old/z80/kernel/include/fs/users.h
new file mode 100644
index 0000000..83980e5
--- /dev/null
+++ b/sw-old/z80/kernel/include/fs/users.h
@@ -0,0 +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-old/z80/kernel/include/memory.h b/sw-old/z80/kernel/include/memory.h
new file mode 100644
index 0000000..67c4b88
--- /dev/null
+++ b/sw-old/z80/kernel/include/memory.h
@@ -0,0 +1,50 @@
+#ifndef __MEMORY_H__
+#define __MEMORY_H__
+
+#include "types.h"
+#include "devices.h"
+
+/* maximum number of pages on the system */
+#define PAGES_MAX_COUNT 32
+#define PAGE_SIZE     1000
+
+/* in our system there are only 16 pages since only 64KB can be addressed
+ * to optimize the memory management in ROM and RAM only pages from this set
+ * shall be used
+ */
+// ROM
+#define ADDR_PAGE_0  0x0000
+#define ADDR_PAGE_1  0x1000
+#define ADDR_PAGE_2  0x2000
+#define ADDR_PAGE_3  0x3000
+// IOSPACE
+#define ADDR_PAGE_4  0x4000
+#define ADDR_PAGE_5  0x5000
+#define ADDR_PAGE_6  0x6000
+#define ADDR_PAGE_7  0x7000
+// RAM
+#define ADDR_PAGE_8  0x8000
+#define ADDR_PAGE_9  0x9000
+#define ADDR_PAGE_10 0xA000
+#define ADDR_PAGE_11 0xB000
+#define ADDR_PAGE_12 0xC000
+#define ADDR_PAGE_13 0xD000
+#define ADDR_PAGE_14 0xE000
+#define ADDR_PAGE_15 0xF000
+
+#define ADDR_PAGE_FIRST  ADDR_PAGE_8
+#define ADDR_PAGE_LAST   ADDR_PAGE_15
+
+struct page
+{
+	pid_t pid;       // process owner of the page (0 if free)
+    uint16_t addr;   // physical address
+};
+
+int mmu_write_table(void);
+
+int page_new(void);
+int page_map(int page, int pid, uint16_t addr);
+int page_unmap(int page);
+
+#endif // __MEMORY_H__
diff --git a/sw-old/z80/kernel/include/process.h b/sw-old/z80/kernel/include/process.h
new file mode 100644
index 0000000..3b0c843
--- /dev/null
+++ b/sw-old/z80/kernel/include/process.h
@@ -0,0 +1,43 @@
+#ifndef __PROCESS_H__
+#define __PROCESS_H__
+
+#include "types.h"
+#include "memory.h"
+
+ /* maximum number of processes (i.e. pages in ram)
+  * since each program can use only one page in ram
+  */
+#define PROC_COUNT 2 
+
+/* the pid is defined with a single byte (pid_t is uint8_t), because of that 
+ * there cannot be more than 255 processes open at the same time. this is a
+ * limitation but for our purposes is more than enough
+ */
+#define PID_COUNT_MAX 255
+
+struct executable
+{
+    void *text;
+    size_t text_size;
+    void *bss;
+    size_t bss_size;
+};
+
+struct process
+{
+    uint blocked :1;      // process is waiting for hardware or locked
+    uint running :1;      // pid is used
+    uint pages;           // number of pages used by the process
+    struct page page[4];  // pages used by the process
+};
+
+pid_t newpid(void);
+
+int fork(void);
+int exec(char *path, char *args);
+int spawn(char *path, char *args);
+
+pid_t getpid(void);
+int kill(pid_t pid);
+
+#endif // __PROCESS_H__
diff --git a/sw-old/z80/kernel/include/sio.h b/sw-old/z80/kernel/include/sio.h
new file mode 100644
index 0000000..276b99c
--- /dev/null
+++ b/sw-old/z80/kernel/include/sio.h
@@ -0,0 +1,43 @@
+#ifndef __SIO_H__
+#define __SIO_H__
+
+#include "types.h"
+
+#define SIO_PORT_0 0x0
+#define SIO_PORT_1 0x1
+#define SIO_PORT_2 0x2
+#define SIO_PORT_3 0x3
+#define SIO_PORT_4 0x4
+#define SIO_PORT_5 0x5
+#define SIO_PORT_6 0x6
+#define SIO_PORT_7 0x7
+
+/* current port in use */
+extern uint8_t      sio_port;
+
+/* current seek in the device */
+extern devsize_t    sio_seek;
+
+struct dev_buffer
+{
+   // TODO, bytes needed to the device buffer interface
+};
+
+/* points to the buffers mapped in the I/O space */
+/* to be defined precisely in assembly */
+extern volatile struct dev_buffer sio_buffers[8];
+
+/* 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 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  // __SIO_H__
diff --git a/sw-old/z80/kernel/include/stat.h b/sw-old/z80/kernel/include/stat.h
new file mode 100644
index 0000000..44c0f63
--- /dev/null
+++ b/sw-old/z80/kernel/include/stat.h
@@ -0,0 +1,24 @@
+#ifndef __STAT_H__
+#define __STAT_H__
+
+#include "types.h"
+
+struct stat
+{
+    inode_t     inode;      /* inode reference */
+
+    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);
+
+#endif  // __STAT_H__
diff --git a/sw-old/z80/kernel/include/types.h b/sw-old/z80/kernel/include/types.h
new file mode 100644
index 0000000..c6e620b
--- /dev/null
+++ b/sw-old/z80/kernel/include/types.h
@@ -0,0 +1,62 @@
+#ifndef __TYPES_H__
+#define __TYPES_H__
+
+/* only types from primitive types are defined in this file */ 
+
+typedef volatile unsigned char      register_t;
+
+typedef unsigned int                uint;
+
+typedef char                        int8_t;
+typedef unsigned char               uint8_t;
+typedef int                         int16_t;
+typedef unsigned int                uint16_t;
+typedef long int                    int32_t;
+typedef unsigned long int           uint32_t;
+
+typedef uint16_t                    size_t;
+typedef int16_t                     ssize_t;
+
+typedef uint8_t                     pid_t;
+typedef uint16_t                    ino_t;
+
+typedef uint8_t                     dev_t;
+typedef uint32_t                    devsize_t;
+typedef uint8_t                     fd_t;
+typedef uint16_t                    blk_t;
+typedef uint8_t                     user_t;
+
+typedef struct {
+    uint8_t member[3];
+
+} uint24_t;
+
+typedef uint32_t                    fsize_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