diff options
| author | Benjamin Herrenschmidt <benh@kernel.crashing.org> | 2008-12-18 19:13:22 +0000 |
|---|---|---|
| committer | Paul Mackerras <paulus@samba.org> | 2008-12-21 14:21:15 +1100 |
| commit | 6d2170be4561293a6aa821c773687bd3f18e8206 (patch) | |
| tree | b267fb2405c6029dcc7958c5786699741064e43f /arch/powerpc/sysdev/dcr-low.S | |
| parent | fecba96268fc48ab9b4a016356a8f2371df25e64 (diff) | |
powerpc/4xx: Extended DCR support v2
This adds supports to the "extended" DCR addressing via the indirect
mfdcrx/mtdcrx instructions supported by some 4xx cores (440H6 and
later).
I enabled the feature for now only on AMCC 460 chips.
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Acked-by: Josh Boyer <jwboyer@linux.vnet.ibm.com>
Acked-by: Kumar Gala <galak@kernel.crashing.org>
Signed-off-by: Paul Mackerras <paulus@samba.org>
Diffstat (limited to 'arch/powerpc/sysdev/dcr-low.S')
| -rw-r--r-- | arch/powerpc/sysdev/dcr-low.S | 8 |
1 files changed, 7 insertions, 1 deletions
diff --git a/arch/powerpc/sysdev/dcr-low.S b/arch/powerpc/sysdev/dcr-low.S index 2078f39e2f17..d3098ef1404a 100644 --- a/arch/powerpc/sysdev/dcr-low.S +++ b/arch/powerpc/sysdev/dcr-low.S @@ -11,14 +11,20 @@ #include <asm/ppc_asm.h> #include <asm/processor.h> +#include <asm/bug.h> #define DCR_ACCESS_PROLOG(table) \ + cmpli cr0,r3,1024; \ rlwinm r3,r3,4,18,27; \ lis r5,table@h; \ ori r5,r5,table@l; \ add r3,r3,r5; \ + bge- 1f; \ mtctr r3; \ - bctr + bctr; \ +1: trap; \ + EMIT_BUG_ENTRY 1b,__FILE__,__LINE__,0; \ + blr _GLOBAL(__mfdcr) DCR_ACCESS_PROLOG(__mfdcr_table) |