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Redefine ptoa() to be the inverse of atop. If you were using a 32-bit vaddr_t

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with 64-bit paddr_t and using managed addresses > 4GB, uvm_page_init would
silently discard the upper 32-bits of the physical address possibly double
mapping pages.
This commit is contained in:
matt 2011-11-29 07:43:54 +00:00
parent 38f95ba1b7
commit a617230f3e
1 changed files with 2 additions and 2 deletions
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4
sys/uvm/uvm_param.h
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@ -1,4 +1,4 @@
/* $NetBSD: uvm_param.h,v 1.25 2010/11/14 04:31:02 uebayasi Exp $ */
/* $NetBSD: uvm_param.h,v 1.26 2011/11/29 07:43:54 matt Exp $ */
/*
* Copyright (c) 1991, 1993
@ -199,7 +199,7 @@ extern int *uvmexp_pageshift;
*/
#ifdef _KERNEL
#define atop(x) (((paddr_t)(x)) >> PAGE_SHIFT)
#define ptoa(x) ((vaddr_t)((vaddr_t)(x) << PAGE_SHIFT))
#define ptoa(x) (((paddr_t)(x)) << PAGE_SHIFT)
/*
* Round off or truncate to the nearest page. These will work