From: David S. Miller <davem@davemloft.net>
Date: Wed, 1 Feb 2006 02:33:49 +0000 (-0800)
Subject: [SPARC64]: Increase swapper_tsb size to 32K.
X-Git-Tag: v2.6.17-rc1~1184^2~213
X-Git-Url: https://err.no/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=2f7ee7c63f08b7f883b710a29d91c1891b81b8e1;p=linux-2.6

[SPARC64]: Increase swapper_tsb size to 32K.

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

diff --git a/arch/sparc64/kernel/head.S b/arch/sparc64/kernel/head.S
index 2988be8514..7840271d7a 100644
--- a/arch/sparc64/kernel/head.S
+++ b/arch/sparc64/kernel/head.S
@@ -484,16 +484,16 @@ sparc64_boot_end:
 /*
  * The following skip makes sure the trap table in ttable.S is aligned
  * on a 32K boundary as required by the v9 specs for TBA register.
+ *
+ * We align to a 32K boundary, then we have the 32K kernel TSB,
+ * then the 32K aligned trap table.
  */
 1:
 	.skip	0x4000 + _start - 1b
 
-#ifdef CONFIG_SBUS
-/* This is just a hack to fool make depend config.h discovering
-   strategy: As the .S files below need config.h, but
-   make depend does not find it for them, we include config.h
-   in head.S */
-#endif
+	.globl	swapper_tsb
+swapper_tsb:
+	.skip	(32 * 1024)
 
 ! 0x0000000000408000
 
diff --git a/arch/sparc64/kernel/vmlinux.lds.S b/arch/sparc64/kernel/vmlinux.lds.S
index f018aaf454..467d13a0d5 100644
--- a/arch/sparc64/kernel/vmlinux.lds.S
+++ b/arch/sparc64/kernel/vmlinux.lds.S
@@ -43,9 +43,6 @@ SECTIONS
   __ex_table : { *(__ex_table) }
   __stop___ex_table = .;
 
-  . = ALIGN(8192);
-  swapper_tsb = .;
-  . += 8192;
   . = ALIGN(8192);
   __init_begin = .;
   .init.text : { 
diff --git a/arch/sparc64/mm/tsb.c b/arch/sparc64/mm/tsb.c
index e605478217..1c4e5c2dfc 100644
--- a/arch/sparc64/mm/tsb.c
+++ b/arch/sparc64/mm/tsb.c
@@ -12,14 +12,6 @@
 #include <asm/pgtable.h>
 #include <asm/tsb.h>
 
-/* We use an 8K TSB for the whole kernel, this allows to
- * handle about 4MB of modules and vmalloc mappings without
- * incurring many hash conflicts.
- */
-#define KERNEL_TSB_SIZE_BYTES	8192
-#define KERNEL_TSB_NENTRIES \
-	(KERNEL_TSB_SIZE_BYTES / sizeof(struct tsb))
-
 extern struct tsb swapper_tsb[KERNEL_TSB_NENTRIES];
 
 static inline unsigned long tsb_hash(unsigned long vaddr, unsigned long nentries)
diff --git a/include/asm-sparc64/tsb.h b/include/asm-sparc64/tsb.h
index 09ab3aaa8d..1addd91d72 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; \