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opnsense-src/sys/dev/ichwd
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ShengYi Hung 2b74ff5fce ichwd: introduce i6300esbwd watch dog driver 
The intel 6300ESB watchdog is a special ICH-based watchdog device with a
different interface.
QEMU implements this watchdog for x86 systems.

This change enables watchdog mode (rather than free-running mode) and
introduces 1 sysctl:
- hw.i6300esbwd.0.locked: locks the watchdog register after the event is
triggered, preventing it from being disabled until a hard reset.

This feature has been tested on a Vultr AMD guest machine and local qemu
machine.

PR:    259673
Approved by:    markj (mentor), lwhsu (mentor)
MFC after:      2 weeks
Sponsored by:   The FreeBSD Foundation
Differential Revision: https://reviews.freebsd.org/D52049
2025-08-25 11:45:24 -04:00
..
i6300esbwd.c ichwd: introduce i6300esbwd watch dog driver 2025-08-25 11:45:24 -04:00
i6300esbwd.h ichwd: introduce i6300esbwd watch dog driver 2025-08-25 11:45:24 -04:00
ichwd.c ichwd: introduce i6300esbwd watch dog driver 2025-08-25 11:45:24 -04:00
ichwd.h ichwd: introduce i6300esbwd watch dog driver 2025-08-25 11:45:24 -04:00