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author | Vivek Goyal <vgoyal@in.ibm.com> | 2007-05-02 19:27:07 +0200 |
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committer | Andi Kleen <andi@basil.nowhere.org> | 2007-05-02 19:27:07 +0200 |
commit | 49c3df6aaa6a51071fc135273d1a2515d019099f (patch) | |
tree | cbd2fb611d14c9c859f7f417dfafae36ebebe29b /arch/powerpc/kernel/suspend.c | |
parent | cfd243d4af7c7f8f52f5cb99d3932d9074b039ff (diff) | |
download | op-kernel-dev-49c3df6aaa6a51071fc135273d1a2515d019099f.zip op-kernel-dev-49c3df6aaa6a51071fc135273d1a2515d019099f.tar.gz |
[PATCH] x86: Move swsusp __pa() dependent code to arch portion
o __pa() should be used only on kernel linearly mapped virtual addresses
and not on kernel text and data addresses.
o Hibernation code needs to determine the physical address associated
with kernel symbol to mark a section boundary which contains pages which
don't have to be saved and restored during hibernate/resume operation.
o Move this piece of code in arch dependent section. So that architectures
which don't have kernel text/data mapped into kernel linearly mapped
region can come up with their own ways of determining physical addresses
associated with a kernel text.
Signed-off-by: Vivek Goyal <vgoyal@in.ibm.com>
Signed-off-by: Andi Kleen <ak@suse.de>
Diffstat (limited to 'arch/powerpc/kernel/suspend.c')
-rw-r--r-- | arch/powerpc/kernel/suspend.c | 24 |
1 files changed, 24 insertions, 0 deletions
diff --git a/arch/powerpc/kernel/suspend.c b/arch/powerpc/kernel/suspend.c new file mode 100644 index 0000000..8cee571 --- /dev/null +++ b/arch/powerpc/kernel/suspend.c @@ -0,0 +1,24 @@ +/* + * Suspend support specific for power. + * + * Distribute under GPLv2 + * + * Copyright (c) 2002 Pavel Machek <pavel@suse.cz> + * Copyright (c) 2001 Patrick Mochel <mochel@osdl.org> + */ + +#include <asm/page.h> + +/* References to section boundaries */ +extern const void __nosave_begin, __nosave_end; + +/* + * pfn_is_nosave - check if given pfn is in the 'nosave' section + */ + +int pfn_is_nosave(unsigned long pfn) +{ + unsigned long nosave_begin_pfn = __pa(&__nosave_begin) >> PAGE_SHIFT; + unsigned long nosave_end_pfn = PAGE_ALIGN(__pa(&__nosave_end)) >> PAGE_SHIFT; + return (pfn >= nosave_begin_pfn) && (pfn < nosave_end_pfn); +} |