[SPARC64]: Use ASI_SCRATCHPAD address 0x0 properly.

This is where the virtual address of the fault status
area belongs.

To set it up we don't make a hypervisor call, instead
we call OBP's SUNW,set-trap-table with the real address
of the fault status area as the second argument.  And
right before that call we write the virtual address into
ASI_SCRATCHPAD vaddr 0x0.

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

3 files changed, 31 insertions, 30 deletions

diff --git a/include/asm-sparc64/cpudata.h b/include/asm-sparc64/cpudata.h
index 338b0ca5b51..5a970f5ed9b 100644
--- a/include/asm-sparc64/cpudata.h
+++ b/include/asm-sparc64/cpudata.h
@@ -156,13 +156,16 @@ extern struct sun4v_2insn_patch_entry __sun4v_2insn_patch,
 	nop;						\
 	.previous;
 
-/* Clobbers TMP, current address space PGD phys address into DEST.  */
-#define TRAP_LOAD_PGD_PHYS(DEST, TMP)		\
+#define TRAP_LOAD_TRAP_BLOCK(DEST, TMP)		\
 	__GET_CPUID(TMP)			\
 	sethi	%hi(trap_block), DEST;		\
 	sllx	TMP, TRAP_BLOCK_SZ_SHIFT, TMP;	\
 	or	DEST, %lo(trap_block), DEST;	\
 	add	DEST, TMP, DEST;		\
+
+/* Clobbers TMP, current address space PGD phys address into DEST.  */
+#define TRAP_LOAD_PGD_PHYS(DEST, TMP)		\
+	TRAP_LOAD_TRAP_BLOCK(DEST, TMP)		\
 	ldx	[DEST + TRAP_PER_CPU_PGD_PADDR], DEST;
 
 /* Clobbers TMP, loads local processor's IRQ work area into DEST.  */
@@ -175,11 +178,8 @@ extern struct sun4v_2insn_patch_entry __sun4v_2insn_patch,
 
 /* Clobbers TMP, loads DEST with current thread info pointer.  */
 #define TRAP_LOAD_THREAD_REG(DEST, TMP)		\
-	__GET_CPUID(TMP)			\
-	sethi	%hi(trap_block), DEST;		\
-	sllx	TMP, TRAP_BLOCK_SZ_SHIFT, TMP;	\
-	or	DEST, %lo(trap_block), DEST;	\
-	ldx	[DEST + TMP], DEST;
+	TRAP_LOAD_TRAP_BLOCK(DEST, TMP)		\
+	ldx	[DEST + TRAP_PER_CPU_THREAD], DEST;
 
 /* Given the current thread info pointer in THR, load the per-cpu
  * area base of the current processor into DEST.  REG1, REG2, and REG3 are
@@ -201,13 +201,13 @@ extern struct sun4v_2insn_patch_entry __sun4v_2insn_patch,
 
 #else
 
-#define __GET_CPUID(REG)				\
-	mov	0, REG;
+#define TRAP_LOAD_TRAP_BLOCK(DEST, TMP)		\
+	sethi	%hi(trap_block), DEST;		\
+	or	DEST, %lo(trap_block), DEST;	\
 
 /* Uniprocessor versions, we know the cpuid is zero.  */
 #define TRAP_LOAD_PGD_PHYS(DEST, TMP)		\
-	sethi	%hi(trap_block), DEST;		\
-	or	DEST, %lo(trap_block), DEST;	\
+	TRAP_LOAD_TRAP_BLOCK(DEST, TMP)		\
 	ldx	[DEST + TRAP_PER_CPU_PGD_PADDR], DEST;
 
 #define TRAP_LOAD_IRQ_WORK(DEST, TMP)		\
@@ -215,8 +215,8 @@ extern struct sun4v_2insn_patch_entry __sun4v_2insn_patch,
 	or	DEST, %lo(__irq_work), DEST;
 
 #define TRAP_LOAD_THREAD_REG(DEST, TMP)		\
-	sethi	%hi(trap_block), DEST;		\
-	ldx	[DEST + %lo(trap_block)], DEST;
+	TRAP_LOAD_TRAP_BLOCK(DEST, TMP)		\
+	ldx	[DEST + TRAP_PER_CPU_THREAD], DEST;
 
 /* No per-cpu areas on uniprocessor, so no need to load DEST.  */
 #define LOAD_PER_CPU_BASE(DEST, THR, REG1, REG2, REG3)
diff --git a/include/asm-sparc64/oplib.h b/include/asm-sparc64/oplib.h
index 2ea545b931b..ce5066ef2dd 100644
--- a/include/asm-sparc64/oplib.h
+++ b/include/asm-sparc64/oplib.h
@@ -338,6 +338,7 @@ int cpu_find_by_mid(int mid, int *prom_node);
 
 /* Client interface level routines. */
 extern void prom_set_trap_table(unsigned long tba);
+extern void prom_set_trap_table_sun4v(unsigned long tba, unsigned long mmfsa);
 
 extern long p1275_cmd(const char *, long, ...);
 				   
diff --git a/include/asm-sparc64/ttable.h b/include/asm-sparc64/ttable.h
index 972f913709a..6bb86a7a5b4 100644
--- a/include/asm-sparc64/ttable.h
+++ b/include/asm-sparc64/ttable.h
@@ -180,25 +180,25 @@
 #define KPROBES_TRAP(lvl) TRAP_ARG(bad_trap, lvl)
 #endif
 
-#define SUN4V_ITSB_MISS				\
-	mov	SCRATCHPAD_CPUID, %g1;		\
-	ldxa	[%g1] ASI_SCRATCHPAD, %g2;	\
-	ldxa	[%g1 + %g1] ASI_SCRATCHPAD, %g1;\
-	sethi	%hi(trap_block), %g5;		\
-	sllx	%g2, TRAP_BLOCK_SZ_SHIFT, %g2;	\
-	or	%g5, %lo(trap_block), %g5;	\
-	ba,pt	%xcc, sun4v_itsb_miss;		\
-	 add	%g5, %g2, %g5;
+#define SUN4V_ITSB_MISS					\
+	ldxa	[%g0] ASI_SCRATCHPAD, %g2;		\
+	ldx	[%g2 + HV_FAULT_I_ADDR_OFFSET], %g4;	\
+	ldx	[%g2 + HV_FAULT_I_CTX_OFFSET], %g5;	\
+	srlx	%g4, 22, %g7;				\
+	sllx	%g5, 48, %g6;				\
+	brz,pn	%g5, kvmap_itlb_4v;			\
+	 or	%g6, %g7, %g6;				\
+	ba,a,pt	%xcc, sun4v_itsb_miss;
 
 #define SUN4V_DTSB_MISS				\
-	mov	SCRATCHPAD_CPUID, %g1;		\
-	ldxa	[%g1] ASI_SCRATCHPAD, %g2;	\
-	ldxa	[%g1 + %g1] ASI_SCRATCHPAD, %g1;\
-	sethi	%hi(trap_block), %g5;		\
-	sllx	%g2, TRAP_BLOCK_SZ_SHIFT, %g2;	\
-	or	%g5, %lo(trap_block), %g5;	\
-	ba,pt	%xcc, sun4v_dtsb_miss;		\
-	 add	%g5, %g2, %g5;
+	ldxa	[%g0] ASI_SCRATCHPAD, %g2;		\
+	ldx	[%g2 + HV_FAULT_D_ADDR_OFFSET], %g4;	\
+	ldx	[%g2 + HV_FAULT_D_CTX_OFFSET], %g5;	\
+	srlx	%g4, 22, %g7;				\
+	sllx	%g5, 48, %g6;				\
+	brz,pn	%g5, kvmap_dtlb_4v;			\
+	 or	%g6, %g7, %g6;				\
+	ba,a,pt	%xcc, sun4v_dtsb_miss;
 
 /* Before touching these macros, you owe it to yourself to go and
  * see how arch/sparc64/kernel/winfixup.S works... -DaveM