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Document hw.{pci,acpi}.host_start_mem

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Requested by: ru@
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Warner Losh 2004-10-15 00:15:07 +00:00
parent ccd582b0fd
commit 71a77eda7d
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=136525
1 changed files with 9 additions and 0 deletions
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sys/boot/common/loader.8
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@ -429,6 +429,15 @@ 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.host_start_mem, hw.acpi.host_start_mem
When not otherwise constrained, this limits the memory start
address.
The default is 0x80000000 and should be set to at least size of the
memory and not conflict with other resources.
Typically, only systems without pci bridges need to set this variable
since pci bridges typically constrain the memory starting address
(and the variable is only used when bridges don't constrain this
address).
.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.