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| author | Richard Russo <russor@ruka.org> | 2025-07-23 00:08:31 +0000 |
|---|---|---|
| committer | Warner Losh <imp@FreeBSD.org> | 2025-07-23 00:10:25 +0000 |
| commit | 15925062e1ba75cb4908a68655b797870187ea57 (patch) | |
| tree | c93209f20e31dc6eb7ab9359c868926634583992 /sys/dev/snp/(public-mirror) | |
| parent | d3c9f62862e4e76acec581a2e2c0aa05d7145e24 (diff) | |
Walk through the disk driver entries chained off of INT13.
MEMDISK is part of the Syslinux project; it loads disk images into
memory, sets an int 13h hook and then does a BIOS boot from the image;
this can be used as part of a PXE boot environment to load installer
disks, however the disks are not accessible from inside the FreeBSD
kernel because it doesn't access disks through BIOS APIs.
This patch detects the disk images in the loader, and passes their
address and length as a driver hint. When the md driver sees the hint,
it maps the image, and presents it to the system.
(rebased and reworked from https://reviews.freebsd.org/D27349)
Feedback from: kib, bapt, olce
Differential Revision: https://reviews.freebsd.org/D45404
Diffstat (limited to 'sys/dev/snp/(public-mirror)')
0 files changed, 0 insertions, 0 deletions