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Change PCI_MAPREG_{MEM,IO}_SIZE() to use the standard `x & -x' trick to select 

the lowest bit set.  This isn't any more or less valid according to the PCI
spec, but it deals with lame devices that don't implement all of the top
bits.
This commit is contained in:
mycroft 1996-08-10 15:42:33 +00:00
parent 5c2e33fc0a
commit 121dfd8f1b
1 changed files with 3 additions and 5 deletions
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8
sys/dev/pci/pcireg.h
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@ -1,4 +1,4 @@
/* $NetBSD: pcireg.h,v 1.10 1996/08/06 02:11:25 cgd Exp $ */
/* $NetBSD: pcireg.h,v 1.11 1996/08/10 15:42:33 mycroft Exp $ */
/*
* Copyright (c) 1995, 1996 Christopher G. Demetriou. All rights reserved.
@ -222,16 +222,14 @@ typedef u_int8_t pci_revision_t;
#define PCI_MAPREG_MEM_ADDR(mr) \
((mr) & PCI_MAPREG_MEM_ADDR_MASK)
#define PCI_MAPREG_MEM_SIZE(mr) \
((~PCI_MAPREG_MEM_ADDR(mr) & PCI_MAPREG_MEM_SIZE_MASK) + 1)
(PCI_MAPREG_MEM_ADDR(mr) & -PCI_MAPREG_MEM_ADDR(mr))
#define PCI_MAPREG_MEM_ADDR_MASK 0xfffffff0
#define PCI_MAPREG_MEM_SIZE_MASK 0xffffffff
#define PCI_MAPREG_IO_ADDR(mr) \
((mr) & PCI_MAPREG_IO_ADDR_MASK)
#define PCI_MAPREG_IO_SIZE(mr) \
((~PCI_MAPREG_IO_ADDR(mr) & PCI_MAPREG_IO_SIZE_MASK) + 1)
(PCI_MAPREG_IO_ADDR(mr) & -PCI_MAPREG_IO_ADDR(mr))
#define PCI_MAPREG_IO_ADDR_MASK 0xfffffffe
#define PCI_MAPREG_IO_SIZE_MASK 0xffffffff
/*
* Interrupt Configuration Register; contains interrupt pin and line.