Drop some .Pps, and convert some empty lines to .Pps.
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wiz
parent
a6623f6ddf
commit
35f42d96d9
@ -1,4 +1,4 @@
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.\" $NetBSD: pcibios.4,v 1.11 2001/04/21 14:33:39 wiz Exp $
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.\" $NetBSD: pcibios.4,v 1.12 2002/01/15 01:44:58 wiz Exp $
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.\"
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.\" Copyright (c) 1999, 2000 The NetBSD Foundation, Inc.
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.\" All rights reserved.
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@ -50,9 +50,8 @@
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.Cd "#options PCIBIOS_INTR_FIXUP_FORCE"
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.Cd "options PCIBIOS_INTR_GUESS"
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.Cd "#options PCIINTR_DEBUG"
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.Pp
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.Sh INTRODUCTION
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.Nx
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.Nm
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provides support for setting up PCI controllers, bridges, and devices
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using information extracted from the BIOS.
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.Pp
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@ -65,13 +64,10 @@ boots.
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.Pp
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Options:
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.Bl -tag -width PCIBIOS_INTR_FIXUP -offset 3n
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.It Nm PCIBIOS
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turn on the PCI BIOS support.
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.It Nm PCIBIOSVERBOSE
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make the setup procedure verbose.
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.It Nm PCIBIOS_ADDR_FIXUP
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fixup PCI I/O and memory addresses.
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.Pp
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@ -82,18 +78,18 @@ which is
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shows this behavior.
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Since necessary space isn't allocated, those devices
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will not work without special handling.
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.Pp
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This option allocates I/O space and memory space
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instead of relying upon the BIOS to do so.
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.Pp
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If necessary space is already correctly assigned to the devices,
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this option leaves the space as is.
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.Pp
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Although many BIOS implementations leave CardBus bridges'
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space unallocated, the CardBus bridge device driver doesn't
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require this option, since the driver allocates necessary space
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by itself.
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.Pp
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.It Nm PCIBIOS_BUS_FIXUP
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fixup PCI bus numbering; needed for many
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.Xr cardbus 4
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@ -103,7 +99,7 @@ Each PCI bus and CardBus should have a unique bus number.
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But some BIOS implementations don't assign a bus number
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for subordinate PCI buses. And many BIOS implementations
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don't assign a bus number for CardBuses.
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.Pp
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A typical symptom of this is the following boot message:
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.D1 Sy cardbus0 at cardslot0: bus 0 device 0...
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Please note that this cardbus0 has a bus number
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@ -117,26 +113,24 @@ show correct device ID,
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because its bus number 0 incorrectly refers to the primary
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PCI bus, and a device ID in the primary PCI bus is shown
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in the boot message instead of the device's ID in the cardbus0.
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.Pp
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This option assigns bus numbers for all subordinate
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PCI buses and CardBuses.
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.Pp
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Since this option renumbers all PCI buses and CardBuses,
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all bus numbers of subordinate buses become different
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when this option is enabled.
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.It Nm PCIBIOS_INTR_FIXUP
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fixup PCI interrupt routing.
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.Pp
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Some BIOS implementations don't assign an interrupt for
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some devices.
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.Pp
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This option assigns an interrupt for such devices instead
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of relying upon the BIOS to do so.
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.Pp
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If the BIOS has already assigned an interrupt to a device, this
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option leaves the interrupt as is.
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.It Nm PCIBIOS_IRQS_HINT
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hint for IRQ use.
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When the
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@ -154,7 +148,7 @@ The value is a logical or of power-of-2s of allowable interrupts:
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For example,
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.Qq Sy options PCIBIOS_IRQS_HINT=0x0a00
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allows IRQ 9 and IRQ 11.
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.Pp
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The kernel global variable
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.Va pcibios_irqs_hint
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holds this value,
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@ -184,9 +178,7 @@ prompt:
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.Dl Ic set pcibios_irqs_hint=0xa00
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.Dl Ic quit
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.El
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.It Nm PCIBIOS_INTR_FIXUP_FORCE
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.Pp
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Some buggy BIOS implementations provide inconsistent
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information between the PCI Interrupt Configuration Register
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and the PCI Interrupt Routing table. In such case,
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@ -196,7 +188,7 @@ by default. If this happens, a kernel with
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shows
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.Qq Sy WARNING: preserving irq XX
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in the PCI routing table.
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.Pp
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If
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.Em PCIBIOS_INTR_FIXUP_FORCE
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is specified in addition to the
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@ -207,7 +199,6 @@ In this case, a kernel with
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shows
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.Qq Sy WARNING: overriding irq XX
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in the PCI routing table.
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.It Nm PCIBIOS_INTR_GUESS
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make
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.Em PCIBIOS_INTR_FIXUP
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@ -215,7 +206,7 @@ work with unknown interrupt router.
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.Pp
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If a PCI interrupt router is not known, normally interrupt
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configuration will not be touched.
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.Pp
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But if
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.Em PCIBIOS_INTR_GUESS
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is specified in addition to the
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@ -224,12 +215,10 @@ and if a PCI interrupt routing table entry indicates that only
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one IRQ is available for the entry, the IRQ is assumed to be already
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connected to the device, and corresponding PCI Interrupt
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Configuration Register will be configured accordingly.
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.It Nm PCIINTR_DEBUG
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make the
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.Em PCIBIOS_INTR_FIXUP
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procedure verbose.
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.El
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.Sh SEE ALSO
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.Xr cardbus 4 ,
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