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| author | Alan Cox <alc@FreeBSD.org> | 2007-05-05 19:50:28 +0000 |
|---|---|---|
| committer | Alan Cox <alc@FreeBSD.org> | 2007-05-05 19:50:28 +0000 |
| commit | 04a18977c815b83bf38911871f3c4ca7f881f275 (patch) | |
| tree | 7aa0cbd313dfa6ace4e0a35a84679f7d3492a165 /sys/sun4v | |
| parent | 4887800305c8d2e9e6b5fdeb06aa86519e74b0ba (diff) | |
| download | src-04a18977c815b83bf38911871f3c4ca7f881f275.tar.gz src-04a18977c815b83bf38911871f3c4ca7f881f275.zip | |
Define every architecture as either VM_PHYSSEG_DENSE or
VM_PHYSSEG_SPARSE depending on whether the physical address space is
densely or sparsely populated with memory. The effect of this
definition is to determine which of two implementations of
vm_page_array and PHYS_TO_VM_PAGE() is used. The legacy
implementation is obtained by defining VM_PHYSSEG_DENSE, and a new
implementation that trades off time for space is obtained by defining
VM_PHYSSEG_SPARSE. For now, all architectures except for ia64 and
sparc64 define VM_PHYSSEG_DENSE. Defining VM_PHYSSEG_SPARSE on ia64
allows the entirety of my Itanium 2's memory to be used. Previously,
only the first 1 GB could be used. Defining VM_PHYSSEG_SPARSE on
sparc64 allows USIIIi-based systems to boot without crashing.
This change is a combination of Nathan Whitehorn's patch and my own
work in perforce.
Discussed with: kmacy, marius, Nathan Whitehorn
PR: 112194
Notes
Notes:
svn path=/head/; revision=169291
Diffstat (limited to 'sys/sun4v')
| -rw-r--r-- | sys/sun4v/include/vmparam.h | 5 |
1 files changed, 5 insertions, 0 deletions
diff --git a/sys/sun4v/include/vmparam.h b/sys/sun4v/include/vmparam.h index 3b87beace822..6d475f667696 100644 --- a/sys/sun4v/include/vmparam.h +++ b/sys/sun4v/include/vmparam.h @@ -78,6 +78,11 @@ #define MAXSLP 20 /* + * The physical address space is densely populated. + */ +#define VM_PHYSSEG_DENSE + +/* * Address space layout. * * UltraSPARC I and II implement a 44 bit virtual address space. The address |