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according to the PCI 2.1 spec, the low _two_ bits of I/O BARs have

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defined meaning/value other than specifying the address of the region.
(lowest bit is 1, meaning I/O space.  second-lowest bit is reserved.)
This commit is contained in:
cgd 1998-06-01 17:48:13 +00:00
parent 6a5e8c9ebf
commit 350942b30d
1 changed files with 2 additions and 2 deletions
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4
sys/dev/pci/pcireg.h
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@ -1,4 +1,4 @@
/* $NetBSD: pcireg.h,v 1.15 1998/05/18 17:17:04 cgd Exp $ */
/* $NetBSD: pcireg.h,v 1.16 1998/06/01 17:48:13 cgd Exp $ */
/*
* Copyright (c) 1995, 1996 Christopher G. Demetriou. All rights reserved.
@ -280,7 +280,7 @@ typedef u_int8_t pci_revision_t;
((mr) & PCI_MAPREG_IO_ADDR_MASK)
#define PCI_MAPREG_IO_SIZE(mr) \
(PCI_MAPREG_IO_ADDR(mr) & -PCI_MAPREG_IO_ADDR(mr))
#define PCI_MAPREG_IO_ADDR_MASK 0xfffffffe
#define PCI_MAPREG_IO_ADDR_MASK 0xfffffffc
/*
* Interrupt Configuration Register; contains interrupt pin and line.