Document hw.{pci,acpi}.host_start_mem
Requested by: ru@
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2020-12-20 02:59:44 +00:00
svn path=/head/; revision=136525
@ -429,6 +429,15 @@ are also accepted and indicate kilobytes, megabytes and gigabytes
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respectively.
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An invalid suffix will result in the variable being ignored by the
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kernel.
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.It Va hw.pci.host_start_mem, hw.acpi.host_start_mem
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When not otherwise constrained, this limits the memory start
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address.
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The default is 0x80000000 and should be set to at least size of the
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memory and not conflict with other resources.
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Typically, only systems without pci bridges need to set this variable
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since pci bridges typically constrain the memory starting address
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(and the variable is only used when bridges don't constrain this
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address).
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.It Va hw.pci.enable_io_modes
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Enable PCI resources which are left off by some BIOSes or are not
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enabled correctly by the device driver.
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