Merge git://git.kernel.org/pub/scm/linux/kernel/git/sfrench/cifs-2.6

[pandora-kernel.git] / arch / sparc64 / kernel / ktlb.S

diff --git a/arch/sparc64/kernel/ktlb.S b/arch/sparc64/kernel/ktlb.S
index d4024ac..cef8def 100644 (file)
--- a/arch/sparc64/kernel/ktlb.S
+++ b/arch/sparc64/kernel/ktlb.S
@@ -1,6 +1,6 @@
 /* arch/sparc64/kernel/ktlb.S: Kernel mapping TLB miss handling.
  *
- * Copyright (C) 1995, 1997, 2005 David S. Miller <davem@davemloft.net>
+ * Copyright (C) 1995, 1997, 2005, 2008 David S. Miller <davem@davemloft.net>
  * Copyright (C) 1996 Eddie C. Dost        (ecd@brainaid.de)
  * Copyright (C) 1996 Miguel de Icaza      (miguel@nuclecu.unam.mx)
  * Copyright (C) 1996,98,99 Jakub Jelinek  (jj@sunsite.mff.cuni.cz)
@@ -226,6 +226,17 @@ kvmap_dtlb_load:
        ba,pt           %xcc, sun4v_dtlb_load
         mov            %g5, %g3
 
+#ifdef CONFIG_SPARSEMEM_VMEMMAP
+kvmap_vmemmap:
+       sub             %g4, %g5, %g5
+       srlx            %g5, 22, %g5
+       sethi           %hi(vmemmap_table), %g1
+       sllx            %g5, 3, %g5
+       or              %g1, %lo(vmemmap_table), %g1
+       ba,pt           %xcc, kvmap_dtlb_load
+        ldx            [%g1 + %g5], %g5
+#endif
+
 kvmap_dtlb_nonlinear:
        /* Catch kernel NULL pointer derefs.  */
        sethi           %hi(PAGE_SIZE), %g5
@@ -233,6 +244,15 @@ kvmap_dtlb_nonlinear:
        bleu,pn         %xcc, kvmap_dtlb_longpath
         nop
 
+#ifdef CONFIG_SPARSEMEM_VMEMMAP
+       /* Do not use the TSB for vmemmap.  */
+       mov             (VMEMMAP_BASE >> 24), %g5
+       sllx            %g5, 24, %g5
+       cmp             %g4,%g5
+       bgeu,pn         %xcc, kvmap_vmemmap
+        nop
+#endif
+
        KERN_TSB_LOOKUP_TL1(%g4, %g6, %g5, %g1, %g2, %g3, kvmap_dtlb_load)
 
 kvmap_dtlb_tsbmiss: