[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>
diff --git a/arch/sparc64/kernel/head.S b/arch/sparc64/kernel/head.S
index d048f0d..f581f0e 100644
--- a/arch/sparc64/kernel/head.S
+++ b/arch/sparc64/kernel/head.S
@@ -521,11 +521,36 @@
wrpr %g0, 15, %pil
/* Make the firmware call to jump over to the Linux trap table. */
- call prom_set_trap_table
+ sethi %hi(is_sun4v), %o0
+ lduw [%o0 + %lo(is_sun4v)], %o0
+ brz,pt %o0, 1f
+ nop
+
+ TRAP_LOAD_TRAP_BLOCK(%g2, %g3)
+ add %g2, TRAP_PER_CPU_FAULT_INFO, %g2
+ stxa %g2, [%g0] ASI_SCRATCHPAD
+
+ /* Compute physical address:
+ *
+ * paddr = kern_base + (mmfsa_vaddr - KERNBASE)
+ */
+ sethi %hi(KERNBASE), %g3
+ sub %g2, %g3, %g2
+ sethi %hi(kern_base), %g3
+ ldx [%g3 + %lo(kern_base)], %g3
+ add %g2, %g3, %o1
+
+ call prom_set_trap_table_sun4v
+ sethi %hi(sparc64_ttable_tl0), %o0
+
+ ba,pt %xcc, 2f
+ nop
+
+1: call prom_set_trap_table
sethi %hi(sparc64_ttable_tl0), %o0
/* Start using proper page size encodings in ctx register. */
- sethi %hi(sparc64_kern_pri_context), %g3
+2: sethi %hi(sparc64_kern_pri_context), %g3
ldx [%g3 + %lo(sparc64_kern_pri_context)], %g2
mov PRIMARY_CONTEXT, %g1