[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, 1 insertions, 21 deletions

diff --git a/arch/sparc64/mm/init.c b/arch/sparc64/mm/init.c
index 7faba33202a9..88eb6f6be562 100644
--- a/arch/sparc64/mm/init.c
+++ b/arch/sparc64/mm/init.c
@@ -1109,24 +1109,6 @@ static void __init tsb_phys_patch(void)
         }
 }
 
-/* Register this cpu's fault status area with the hypervisor.  */
-void __cpuinit sun4v_register_fault_status(void)
-{
-        register unsigned long func asm("%o5");
-        register unsigned long arg0 asm("%o0");
-        int cpu = hard_smp_processor_id();
-        struct trap_per_cpu *tb = &trap_block[cpu];
-        unsigned long pa;
-
-        pa = kern_base + ((unsigned long) tb - KERNBASE);
-        func = HV_FAST_MMU_FAULT_AREA_CONF;
-        arg0 = pa;
-        __asm__ __volatile__("ta        %4"
-                             : "=&r" (func), "=&r" (arg0)
-                             : "0" (func), "1" (arg0),
-                               "i" (HV_FAST_TRAP));
-}
-
 /* paging_init() sets up the page tables */
 
 extern void cheetah_ecache_flush_init(void);
@@ -1147,10 +1129,8 @@ void __init paging_init(void)
             tlb_type == hypervisor)
                 tsb_phys_patch();
 
-        if (tlb_type == hypervisor) {
+        if (tlb_type == hypervisor)
                 sun4v_patch_tlb_handlers();
-                sun4v_register_fault_status();
-        }
 
         /* Find available physical memory... */
         read_obp_memory("available", &pavail[0], &pavail_ents);