From 99e085d9a80a4c762595cc09ae7b4ab73e1beede Mon Sep 17 00:00:00 2001 From: Warner Losh Date: Fri, 15 Oct 2004 06:59:07 +0000 Subject: [PATCH] document host_start_mem. # feel free to wordsmith. Suggested by: ru@ --- sys/boot/common/help.common | 12 ++++++++++++ 1 file changed, 12 insertions(+) diff --git a/sys/boot/common/help.common b/sys/boot/common/help.common index f31580a09d9d..02bc3769ea04 100644 --- a/sys/boot/common/help.common +++ b/sys/boot/common/help.common @@ -311,6 +311,18 @@ this option provides a hint as to the actual size of system memory (which will be tested before use). + set hw.{acpi,pci}.host_start_mem= + + Sets the lowest address that the pci code will assign + when it doesn't have other information about the address + to assign (like from a pci bridge). This is only useful + in older systems without a pci bridge. Also, it only + impacts devices that the BIOS doesn't assign to, typically + CardBus bridges. The default is 0x80000000, but + some systems need values like 0xf0000000, 0xfc000000 or + 0xfe000000 may be suitable for older systems (the older + the system, the higher the number typically should be). + set hw.pci.enable_io_modes= Enable PCI resources which are left off by some BIOSes