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authorDavid S. Miller <davem@sunset.davemloft.net>2006-02-10 15:39:51 -0800
committerDavid S. Miller <davem@sunset.davemloft.net>2006-03-20 01:12:15 -0800
commit12eaa328f9fb2d3fcb5afb682c762690d05a3cd8 (patch)
treecce4e68b971757010a3e0bbf035fc65a381a3cd4 /arch/sparc64/kernel/head.S
parent18397944642cbca7fcd4a109b43ed5b4652e95b9 (diff)
[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>
Diffstat (limited to 'arch/sparc64/kernel/head.S')
-rw-r--r--arch/sparc64/kernel/head.S29
1 files changed, 27 insertions, 2 deletions
diff --git a/arch/sparc64/kernel/head.S b/arch/sparc64/kernel/head.S
index d048f0dfd423..f581f0e917f7 100644
--- a/arch/sparc64/kernel/head.S
+++ b/arch/sparc64/kernel/head.S
@@ -521,11 +521,36 @@ setup_trap_table:
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