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This commit is contained in:
haya 2002-05-31 09:54:52 +00:00
parent 83d7d548f9
commit a7937db203
1 changed files with 13 additions and 2 deletions
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15
sys/dev/pci/pccbb.c
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@ -1,4 +1,4 @@
/* $NetBSD: pccbb.c,v 1.75 2002/03/05 11:56:33 haya Exp $ */
/* $NetBSD: pccbb.c,v 1.76 2002/05/31 09:54:52 haya Exp $ */
/*
* Copyright (c) 1998, 1999 and 2000
@ -31,7 +31,7 @@
*/
#include <sys/cdefs.h>
__KERNEL_RCSID(0, "$NetBSD: pccbb.c,v 1.75 2002/03/05 11:56:33 haya Exp $");
__KERNEL_RCSID(0, "$NetBSD: pccbb.c,v 1.76 2002/05/31 09:54:52 haya Exp $");
/*
#define CBB_DEBUG
@ -2969,6 +2969,17 @@ pccbb_rbus_cb_space_alloc(ct, rb, addr, size, mask, align, flags, addrp, bshp)
if (align < 16) {
return 1;
}
/*
* XXX: align more than 0x1000 to avoid overwrapping
* memory windows for two or more devices. 0x1000
* means memory window's granularity.
*
* Two or more devices should be able to share same
* memory window region. However, overrapping memory
* window is not good because some devices, such as
* 3Com 3C575[BC], have a broken address decoder and
* intrude other's memory region.
*/
if (align < 0x1000) {
align = 0x1000;
}