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[SPARC64]: Fix some Niagara memcpy() bugs.

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We need to restore the %asi register properly.
For the kernel this means get_fs(), for user this
means ASI_PNF.

Also, NGcopy_to_user.S was including U3memcpy.S instead
of NGmemcpy.S, oops :-)

Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
David S. Miller 2006-02-11 10:30:41 -08:00
parent e92b92571c
commit 0d4bc95b9c
2 changed files with 8 additions and 4 deletions
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2
arch/sparc64/lib/NGcopy_to_user.S
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@ -37,4 +37,4 @@
nop nop
#endif #endif
#include "U3memcpy.S" #include "NGmemcpy.S"

10
arch/sparc64/lib/NGmemcpy.S
View file

@ -5,11 +5,15 @@
#ifdef __KERNEL__ #ifdef __KERNEL__
#include <asm/asi.h> #include <asm/asi.h>
#include <asm/thread_info.h>
#define GLOBAL_SPARE %g7 #define GLOBAL_SPARE %g7
#define RESTORE_ASI wr %g0, ASI_AIUS, %asi #define RESTORE_ASI(TMP) \
ldub [%g6 + TI_CURRENT_DS], TMP; \
wr TMP, 0x0, %asi;
#else #else
#define GLOBAL_SPARE %g5 #define GLOBAL_SPARE %g5
#define RESTORE_ASI #define RESTORE_ASI(TMP) \
wr %g0, ASI_PNF, %asi
#endif #endif
#ifndef STORE_ASI #ifndef STORE_ASI
@ -246,7 +250,7 @@ FUNC_NAME: /* %o0=dst, %o1=src, %o2=len */
/* %o2 contains any final bytes still needed to be copied /* %o2 contains any final bytes still needed to be copied
* over. If anything is left, we copy it one byte at a time. * over. If anything is left, we copy it one byte at a time.
*/ */
RESTORE_ASI RESTORE_ASI(%o3)
brz,pt %o2, 85f brz,pt %o2, 85f
sub %o0, %o1, %o3 sub %o0, %o1, %o3
ba,a,pt %XCC, 90f ba,a,pt %XCC, 90f