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authorChris Dearman <chris@mips.com>2007-05-25 01:24:20 +0400
committerRalf Baechle <ralf@linux-mips.org>2007-06-14 21:25:15 +0400
commitffe9ee4709cf513fb80e9b7e04d214dd8b76a10d (patch)
tree07453e5644806b9c755159e5a4c1fe11dacfcab0 /arch/mips/oprofile
parentb72c05262298cc2ac92edb657f5ea3a97ad5ea3d (diff)
downloadlinux-ffe9ee4709cf513fb80e9b7e04d214dd8b76a10d.tar.xz
[MIPS] Separate performance counter interrupts
Support for performance counter overflow interrupt that is on a separate interrupt from the timer. Signed-off-by: Chris Dearman <chris@mips.com> Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
Diffstat (limited to 'arch/mips/oprofile')
-rw-r--r--arch/mips/oprofile/op_model_mipsxx.c7
1 files changed, 5 insertions, 2 deletions
diff --git a/arch/mips/oprofile/op_model_mipsxx.c b/arch/mips/oprofile/op_model_mipsxx.c
index 4f94fa261aae..1ea5c9c1010b 100644
--- a/arch/mips/oprofile/op_model_mipsxx.c
+++ b/arch/mips/oprofile/op_model_mipsxx.c
@@ -177,7 +177,10 @@ static int mipsxx_perfcount_handler(void)
unsigned int counters = op_model_mipsxx_ops.num_counters;
unsigned int control;
unsigned int counter;
- int handled = 0;
+ int handled = IRQ_NONE;
+
+ if (cpu_has_mips_r2 && !(read_c0_cause() & (1 << 26)))
+ return handled;
switch (counters) {
#define HANDLE_COUNTER(n) \
@@ -188,7 +191,7 @@ static int mipsxx_perfcount_handler(void)
(counter & M_COUNTER_OVERFLOW)) { \
oprofile_add_sample(get_irq_regs(), n); \
w_c0_perfcntr ## n(reg.counter[n]); \
- handled = 1; \
+ handled = IRQ_HANDLED; \
}
HANDLE_COUNTER(3)
HANDLE_COUNTER(2)