[IA64] remove unused PAL_CALL_IC_OFF

Linux maps PAL instructions with an ITR, but uses a DTC for PAL data.
Section 11.10.2.1.3, "Making PAL Procedures Calls in Physical or Virtual
Mode," of the SDM (rev 2.2), says we must therefore make all PAL calls
with PSR.ic = 1 so that Linux can handle any TLB faults.

PAL_CALL_IC_OFF is currently unused, and as long as we use the ITR + DTC
strategy, we can't use it.  So remove it.  I also removed the code in
ia64_pal_call_static() that conditionally cleared PSR.ic.

Signed-off-by: Bjorn Helgaas <bjorn.helgaas@hp.com>
Signed-off-by: Tony Luck <tony.luck@intel.com>

1 files changed, 3 insertions, 8 deletions

diff --git a/arch/ia64/kernel/pal.S b/arch/ia64/kernel/pal.S
index ebaf1e685f5e..5f50e6bbc686 100644
--- a/arch/ia64/kernel/pal.S
+++ b/arch/ia64/kernel/pal.S
@@ -50,12 +50,10 @@ END(ia64_pal_default_handler)
  *
  * in0         Index of PAL service
  * in1 - in3   Remaining PAL arguments
- * in4         1 ==> clear psr.ic,  0 ==> don't clear psr.ic
- *
  */
 GLOBAL_ENTRY(ia64_pal_call_static)
-        .prologue ASM_UNW_PRLG_RP|ASM_UNW_PRLG_PFS, ASM_UNW_PRLG_GRSAVE(5)
-        alloc loc1 = ar.pfs,5,5,0,0
+        .prologue ASM_UNW_PRLG_RP|ASM_UNW_PRLG_PFS, ASM_UNW_PRLG_GRSAVE(4)
+        alloc loc1 = ar.pfs,4,5,0,0
         movl loc2 = pal_entry_point
 1:      {
           mov r28 = in0
@@ -64,7 +62,6 @@ GLOBAL_ENTRY(ia64_pal_call_static)
         }
         ;;
         ld8 loc2 = [loc2]               // loc2 <- entry point
-        tbit.nz p6,p7 = in4, 0
         adds r8 = 1f-1b,r8
         mov loc4=ar.rsc                 // save RSE configuration
         ;;
@@ -74,13 +71,11 @@ GLOBAL_ENTRY(ia64_pal_call_static)
         .body
         mov r30 = in2
 
-(p6)    rsm psr.i | psr.ic
         mov r31 = in3
         mov b7 = loc2
 
-(p7)    rsm psr.i
+        rsm psr.i
         ;;
-(p6)    srlz.i
         mov rp = r8
         br.cond.sptk.many b7
 1:      mov psr.l = loc3