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[IA64] Force error to surface in nofault code 

Montecito behaves slightly differently than previous processors,
resulting in the MCA due to a failed PIO read to sometimes surfacing
outside the nofault code.  Adding an additional or and stop bits
ensures the MCA surfaces in the nofault code.

Signed-off-by: Russ Anderson <rja@sgi.com>
Signed-off-by: Tony Luck <tony.luck@intel.com>
hifive-unleashed-5.1
Russ Anderson 2007-06-14 16:01:24 -05:00 committed by Tony Luck
parent eaf6c76644
commit c034637967
1 changed files with 2 additions and 1 deletions
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3
arch/ia64/sn/kernel/xp_nofault.S
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@ -21,7 +21,8 @@
xp_nofault_PIOR:
mov r8=r0 // Stage a success return value
ld8.acq r9=[r32];; // PIO Read the specified register
adds r9=1,r9 // Add to force a consume
adds r9=1,r9;; // Add to force consumption
or r9=r9,r9;; // Or to force consumption
br.ret.sptk.many b0;; // Return success
.global xp_error_PIOR