[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>

1 files changed, 5 insertions, 0 deletions

diff --git a/arch/sparc64/prom/misc.c b/arch/sparc64/prom/misc.c
index 87f5cfce23bb..713cbac5f9bf 100644
--- a/arch/sparc64/prom/misc.c
+++ b/arch/sparc64/prom/misc.c
@@ -136,6 +136,11 @@ void prom_set_trap_table(unsigned long tba)
         p1275_cmd("SUNW,set-trap-table", P1275_INOUT(1, 0), tba);
 }
 
+void prom_set_trap_table_sun4v(unsigned long tba, unsigned long mmfsa)
+{
+        p1275_cmd("SUNW,set-trap-table", P1275_INOUT(2, 0), tba, mmfsa);
+}
+
 int prom_get_mmu_ihandle(void)
 {
         int node, ret;