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authorDavid S. Miller <davem@sunset.davemloft.net>2006-02-05 21:29:28 -0800
committerDavid S. Miller <davem@sunset.davemloft.net>2006-03-20 01:11:48 -0800
commit936f482af1743141d637483ec10eb881537c26dc (patch)
tree913da89a4d9f4038c510c9ecf2f5957b0f6d167f /arch/sparc64/kernel/etrap.S
parent6e02493a7f33ac89e698b980a657d77ab2749eaf (diff)
[SPARC64]: Add initial code to twiddle %gl on trap entry/exit.
Instead of setting/clearing PSTATE_AG we have to change the %gl register value on sun4v. Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'arch/sparc64/kernel/etrap.S')
-rw-r--r--arch/sparc64/kernel/etrap.S17
1 files changed, 15 insertions, 2 deletions
diff --git a/arch/sparc64/kernel/etrap.S b/arch/sparc64/kernel/etrap.S
index f2556146a73..4d644949ad4 100644
--- a/arch/sparc64/kernel/etrap.S
+++ b/arch/sparc64/kernel/etrap.S
@@ -102,7 +102,14 @@ etrap_save: save %g2, -STACK_BIAS, %sp
2: mov %g4, %l4
mov %g5, %l5
add %g7, 4, %l2
- wrpr %g0, ETRAP_PSTATE1, %pstate
+
+ /* Go to trap time globals so we can save them. */
+661: wrpr %g0, ETRAP_PSTATE1, %pstate
+ .section .gl_1insn_patch, "ax"
+ .word 661b
+ SET_GL(0)
+ .previous
+
stx %g1, [%sp + PTREGS_OFF + PT_V9_G1]
stx %g2, [%sp + PTREGS_OFF + PT_V9_G2]
sllx %l7, 24, %l7
@@ -195,9 +202,15 @@ etraptl1: /* Save tstate/tpc/tnpc of TL 1-->4 and the tl register itself.
rdpr %tt, %g3
stx %g3, [%g2 + STACK_BIAS + 0x78]
- wrpr %g1, %tl
stx %g1, [%g2 + STACK_BIAS + 0x80]
+ wrpr %g0, 1, %tl
+661: nop
+ .section .gl_1insn_patch, "ax"
+ .word 661b
+ SET_GL(1)
+ .previous
+
rdpr %tstate, %g1
sub %g2, STACKFRAME_SZ + TRACEREG_SZ - STACK_BIAS, %g2
ba,pt %xcc, 1b