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authorWarner Losh <imp@FreeBSD.org>2016-04-14 04:59:51 +0000
committerWarner Losh <imp@FreeBSD.org>2016-04-14 04:59:51 +0000
commitbd3bce41db1e29fb96124a57e89d02e56c4c242b (patch)
treefe9a1d88c1c4bc8f8964451ce33426ad54a424a5 /sys/sys/bio.h
parent47754aa24056aba4a2242c53b2aaf4225f190740 (diff)
downloadsrc-bd3bce41db1e29fb96124a57e89d02e56c4c242b.tar.gz
src-bd3bce41db1e29fb96124a57e89d02e56c4c242b.zip
Deprecate using hints.acpi.0.rsdp to communicate the RSDP to the
system. This uses the hints mechnanism. This mostly works today because when there's no static hints (the default), this value can be fetched from the hint. When there is a static hints file, the hint passed from the boot loader to the kernel is ignored, but for the BIOS case we're able to find it anyway. However, with UEFI, the fallback doesn't work, so we get a panic instead. Switch to acpi.rsdp and use TUNABLE_ULONG_FETCH instead. Continue to generate the old values to allow for transitions. In addition, fall back to the old method if the new method isn't present. Add comments about all this. Differential Revision: https://reviews.freebsd.org/D5866
Notes
Notes: svn path=/head/; revision=297954
Diffstat (limited to 'sys/sys/bio.h')
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