[SPARC64]: Increase swapper_tsb size to 32K.

Signed-off-by: David S. Miller <davem@davemloft.net>

1 files changed, 10 insertions, 3 deletions

diff --git a/include/asm-sparc64/tsb.h b/include/asm-sparc64/tsb.h
index 09ab3aaa8d20..1addd91d7200 100644
--- a/include/asm-sparc64/tsb.h
+++ b/include/asm-sparc64/tsb.h
@@ -143,6 +143,14 @@
          add            REG1, (3 * 8), REG1; \
 99:
 
+        /* We use a 32K TSB for the whole kernel, this allows to
+         * handle about 16MB of modules and vmalloc mappings without
+         * incurring many hash conflicts.
+         */
+#define KERNEL_TSB_SIZE_BYTES   (32 * 1024)
+#define KERNEL_TSB_NENTRIES     \
+        (KERNEL_TSB_SIZE_BYTES / 16)
+
         /* Do a kernel TSB lookup at tl>0 on VADDR+TAG, branch to OK_LABEL
          * on TSB hit.  REG1, REG2, REG3, and REG4 are used as temporaries
          * and the found TTE will be left in REG1.  REG3 and REG4 must
@@ -150,12 +158,11 @@
          *
          * VADDR and TAG will be preserved and not clobbered by this macro.
          */
-        /* XXX non-8K base page size support... */
 #define KERN_TSB_LOOKUP_TL1(VADDR, TAG, REG1, REG2, REG3, REG4, OK_LABEL) \
         sethi           %hi(swapper_tsb), REG1; \
         or              REG1, %lo(swapper_tsb), REG1; \
-        srlx            VADDR, 13, REG2; \
-        and             REG2, (512 - 1), REG2; \
+        srlx            VADDR, PAGE_SHIFT, REG2; \
+        and             REG2, (KERNEL_TSB_NENTRIES - 1), REG2; \
         sllx            REG2, 4, REG2; \
         add             REG1, REG2, REG2; \
         ldda            [REG2] ASI_NUCLEUS_QUAD_LDD, REG3; \