diff options
Diffstat (limited to '')
| -rw-r--r-- | README.md | 23 |
1 files changed, 17 insertions, 6 deletions
@@ -304,9 +304,12 @@ blocks 2-3 inode table (32 inodes x 16 B: type, size, 8 direct block ptrs) blocks 4.. data blocks ``` -- **Inodes + a root directory.** A directory is a file of 16-byte entries - (inode# + name). Files are up to **2 KiB** (8 direct blocks); up to **16** - entries in the root, **32** inodes. +- **Inodes + nested directories.** A directory is a file of 16-byte entries + (inode# + name), each carrying `.`/`..`. Files are up to **2 KiB** (8 direct + blocks); **32** inodes, 16 entries per directory. +- **Paths + per-process cwd.** `open`/`mkdir`/`chdir`/`remove`/`ls` take paths + (absolute `/a/b` or relative `a/b`); each process has a cwd inode (`PROC_CWD`, + inherited on fork). Shell builtins: `cd`, and a cwd-aware prompt. - **Bounce buffer.** Only `read_block`/`write_block` touch cart-RAM banking; everything else works on WRAM buffers. The bitmap + inode table are cached in WRAMX; data/dir blocks stream through a one-block cache. @@ -320,8 +323,15 @@ $ save notes gbos has a real filesystem now $ cat notes gbos has a real filesystem now -$ ls -notes +$ mkdir docs +$ cd docs +/docs$ save note +hi +/docs$ cd / +$ cat docs/note +hi +$ ls docs +note $ wc notes # survives a reboot 1 5 31 ``` @@ -347,7 +357,8 @@ $ wc notes # survives a reboot - [x] **stage 1**: block device (`blk.asm`) via a WRAM bounce buffer - [x] **stage 2**: inodes + root directory; variable-size files (<=2 KiB), bitmap allocators; 16 files / 32 inodes; persists across reboots - - [ ] stage 3: nested directories, path resolution, per-process cwd, `cd`/`mkdir` + - [x] **stage 3**: nested directories, path resolution, per-process cwd, + `cd`/`mkdir`/`ls <dir>` — the whole tree persists across reboots - [ ] Preemptive scheduling: real context save in `TimerISR` → `hSwitchTo` - [ ] Use the `$D000-$DFFF` u-area (SVBK) for per-process kernel state / kstack - [ ] `brk`/heap allocator inside the task bank (heap up, stack down, collision = ENOMEM) |