nexoniarz/SchOS
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SchOS/kernel/dev
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Repository files (latest commit first)
Filename Latest commit message Latest commit date
Nexoniarz c1e52e172f q35: five seconds of boot spent waiting on disks that are not there 
/proc/interrupts on q35 said "LOSING 526" ticks: 5 s of boot with
interrupts off. Timing each step of kmain() found two waits:

- AHCI sent a COMRESET to every empty port and waited a second for a
  link. DET = 0 is "no device", so only DET = 1 is worth a reset now
  (after 20 ms of grace for a drive that is still spinning up).
- ideinit() read 0xFF from a bus with no IDE controller, took the BSY
  bit for a busy drive, and waited out its 1 s timeout. A status of
  0xFF means no controller and is answered at once.

That is every PC with SATA disks. q35 now loses 33 ticks, under the
flag; i440fx still roots on IDE and loses none.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01HH7xukt4aaiGj1nQEAoQf1
2026-10-22 11:10:07 +02:00
..
audio.c audio: /dev/dsp, AudioEngine, and an AC'97 under it 2026-09-24 14:23:13 +02:00
bio.c storage: AHCI, GPT/MBR partitions, and a disk a PC can boot 2026-10-22 10:57:41 +02:00
blkdev.c storage: AHCI, GPT/MBR partitions, and a disk a PC can boot 2026-10-22 10:57:41 +02:00
cdev.c audio: /dev/dsp, AudioEngine, and an AC'97 under it 2026-09-24 14:23:13 +02:00
dbg.c licence: SchOS is GPL-2.0-or-later, no longer Apache-2.0 2026-10-22 08:48:45 +02:00
device.c audio: /dev/dsp, AudioEngine, and an AC'97 under it 2026-09-24 14:23:13 +02:00
disk.c dev: raw disks are 64-bit, so a real drive stops wrapping at 4 GB 2026-08-11 12:15:38 +02:00
fb.c gfx: the console and the crash screen stop drawing on a driver by name 2026-08-15 17:04:10 +02:00
gfx.c smp: every stack on every AP was misaligned by eight 2026-09-23 19:37:35 +02:00
ide.c q35: five seconds of boot spent waiting on disks that are not there 2026-10-22 11:10:07 +02:00
input.c kernel: the clock ran 7x slow because the GPU never acknowledged its interrupt 2026-09-12 21:34:36 +02:00
irq.c irq: MSI first, and poll the INTx lines that never arrive 2026-10-22 10:29:24 +02:00
kbd.c kbd: three layouts, and the arrow keys were sitting on top of UTF-8 2026-09-20 01:09:32 +02:00
keymap.c kbd: three layouts, and the arrow keys were sitting on top of UTF-8 2026-09-20 01:09:32 +02:00
mouse.c boot: stop assuming the machine is an emulator 2026-10-22 10:29:12 +02:00
netuser.c licence: SchOS is GPL-2.0-or-later, no longer Apache-2.0 2026-10-22 08:48:45 +02:00
pci.c irq: MSI first, and poll the INTx lines that never arrive 2026-10-22 10:29:24 +02:00
pciuser.c licence: SchOS is GPL-2.0-or-later, no longer Apache-2.0 2026-10-22 08:48:45 +02:00
procfs.c dbg: the boot menu can turn on remote debugging, in a debug build 2026-09-24 15:05:23 +02:00
ramdisk.c Initial commit: Schunix as it stands before the SchOS rename 2026-08-09 13:47:01 +02:00
text.c gfx: one glyph blitter, and a terminal cell is a surface 2026-09-23 17:57:16 +02:00
ttf.c font: the console draws outlines now, and a byte could not have held Ą 2026-09-20 00:35:34 +02:00
uart.c boot: one line when it works, all of it when it does not 2026-09-14 21:19:50 +02:00
vt.c licence: SchOS is GPL-2.0-or-later, no longer Apache-2.0 2026-10-22 08:48:45 +02:00