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| author | David S. Miller <davem@davemloft.net> | 2006-11-16 22:38:57 +0100 |
|---|---|---|
| committer | David S. Miller <davem@sunset.davemloft.net> | 2006-12-10 11:39:09 +0100 |
| commit | 10e267234cc0133bc9ed26bc34eb09de90c248c0 (patch) | |
| tree | 8493e2767e1752f5873e50cc899a4c701cc55fbb /arch/sparc64/kernel/rtrap.S | |
| parent | Merge branch 'for-linus' of git://one.firstfloor.org/home/andi/git/linux-2.6 (diff) | |
| download | linux-10e267234cc0133bc9ed26bc34eb09de90c248c0.tar.xz linux-10e267234cc0133bc9ed26bc34eb09de90c248c0.zip | |
[SPARC64]: Add irqtrace/stacktrace/lockdep support.
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'arch/sparc64/kernel/rtrap.S')
| -rw-r--r-- | arch/sparc64/kernel/rtrap.S | 23 |
1 files changed, 17 insertions, 6 deletions
diff --git a/arch/sparc64/kernel/rtrap.S b/arch/sparc64/kernel/rtrap.S index 3522cd66f3bb..079d18a11d24 100644 --- a/arch/sparc64/kernel/rtrap.S +++ b/arch/sparc64/kernel/rtrap.S @@ -165,14 +165,26 @@ rtrap: __handle_softirq_continue: rtrap_xcall: sethi %hi(0xf << 20), %l4 - andcc %l1, TSTATE_PRIV, %l3 and %l1, %l4, %l4 + andn %l1, %l4, %l1 + srl %l4, 20, %l4 +#ifdef CONFIG_TRACE_IRQFLAGS + brnz,pn %l4, rtrap_no_irq_enable + nop + call trace_hardirqs_on + nop + wrpr %l4, %pil +rtrap_no_irq_enable: +#endif + andcc %l1, TSTATE_PRIV, %l3 bne,pn %icc, to_kernel - andn %l1, %l4, %l1 + nop /* We must hold IRQs off and atomically test schedule+signal * state, then hold them off all the way back to userspace. - * If we are returning to kernel, none of this matters. + * If we are returning to kernel, none of this matters. Note + * that we are disabling interrupts via PSTATE_IE, not using + * %pil. * * If we do not do this, there is a window where we would do * the tests, later the signal/resched event arrives but we do @@ -256,7 +268,6 @@ rt_continue: ldx [%sp + PTREGS_OFF + PT_V9_G1], %g1 ld [%sp + PTREGS_OFF + PT_V9_Y], %o3 wr %o3, %g0, %y - srl %l4, 20, %l4 wrpr %l4, 0x0, %pil wrpr %g0, 0x1, %tl wrpr %l1, %g0, %tstate @@ -374,8 +385,8 @@ to_kernel: ldx [%g6 + TI_FLAGS], %l5 andcc %l5, _TIF_NEED_RESCHED, %g0 be,pt %xcc, kern_fpucheck - srl %l4, 20, %l5 - cmp %l5, 0 + nop + cmp %l4, 0 bne,pn %xcc, kern_fpucheck sethi %hi(PREEMPT_ACTIVE), %l6 stw %l6, [%g6 + TI_PRE_COUNT] |