diff options
| -rw-r--r-- | sys/boot/common/help.common | 15 | ||||
| -rw-r--r-- | sys/boot/common/loader.8 | 9 |
2 files changed, 24 insertions, 0 deletions
diff --git a/sys/boot/common/help.common b/sys/boot/common/help.common index ad30a33..1a4689b 100644 --- a/sys/boot/common/help.common +++ b/sys/boot/common/help.common @@ -277,6 +277,21 @@ this option provides a hint as to the actual size of system memory (which will be tested before use). + set hw.pci.allow_unsupported_io_range=<value> + + Allow the PCI Bridge to pass through an unsupported + memory range assigned by the BIOS. + + value is 0 (default) or non-zero to enable. + + set hw.pci.enable_io_modes=<value> + + Enable PCI resources which are left off by some BIOSes + or are not enabled correctly by the device driver. + + value is 1 (default), but this may cause problems with + some peripherals. Set to 0 to disable. + ################################################################################ # Tshow DShow the values of variables diff --git a/sys/boot/common/loader.8 b/sys/boot/common/loader.8 index a32be17..56faf91 100644 --- a/sys/boot/common/loader.8 +++ b/sys/boot/common/loader.8 @@ -422,6 +422,15 @@ are also accepted and indicate kilobytes, megabytes and gigabytes respectively. An invalid suffix will result in the variable being ignored by the kernel. +.It Va hw.pci.enable_io_modes +Enable PCI resources which are left off by some BIOSes or are not +enabled correctly by the device driver. +Tunable value set to ON (1) by default, but this may cause problems +with some peripherals. +.It Va hw.pci_allow_unsupported_io_range +Allow the PCI bridge to pass through an unsupported memory range +assigned by the BIOS. +Tunable value set to OFF (0) by default. .It Va kern.maxusers Set the size of a number of statically allocated system tables; see .Xr tuning 7 |
