diff options
| author | Felix Fietkau <nbd@openwrt.org> | 2012-05-02 17:33:04 +0200 |
|---|---|---|
| committer | Ralf Baechle <ralf@linux-mips.org> | 2012-05-15 17:49:19 +0200 |
| commit | 3572a2c37f667ee49333f8863722b8f43eac506b (patch) | |
| tree | 0c33d196770577509403447e6fda88e9b012d3b6 /arch/mips/oprofile | |
| parent | Linux 3.4-rc7 (diff) | |
| download | linux-3572a2c37f667ee49333f8863722b8f43eac506b.tar.xz linux-3572a2c37f667ee49333f8863722b8f43eac506b.zip | |
MIPS: make oprofile use cp0_perfcount_irq if it is set
Make the oprofile code use the performance counters irq.
Signed-off-by: Felix Fietkau <nbd@openwrt.org>
Signed-off-by: John Crispin <blogic@openwrt.org>
Cc: linux-mips@linux-mips.org
Patchwork: https://patchwork.linux-mips.org/patch/3723/
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
Diffstat (limited to 'arch/mips/oprofile')
| -rw-r--r-- | arch/mips/oprofile/op_model_mipsxx.c | 12 |
1 files changed, 12 insertions, 0 deletions
diff --git a/arch/mips/oprofile/op_model_mipsxx.c b/arch/mips/oprofile/op_model_mipsxx.c index 54759f1669d3..baba3bcaa3c2 100644 --- a/arch/mips/oprofile/op_model_mipsxx.c +++ b/arch/mips/oprofile/op_model_mipsxx.c @@ -298,6 +298,11 @@ static void reset_counters(void *arg) } } +static irqreturn_t mipsxx_perfcount_int(int irq, void *dev_id) +{ + return mipsxx_perfcount_handler(); +} + static int __init mipsxx_init(void) { int counters; @@ -374,6 +379,10 @@ static int __init mipsxx_init(void) save_perf_irq = perf_irq; perf_irq = mipsxx_perfcount_handler; + if ((cp0_perfcount_irq >= 0) && (cp0_compare_irq != cp0_perfcount_irq)) + return request_irq(cp0_perfcount_irq, mipsxx_perfcount_int, + 0, "Perfcounter", save_perf_irq); + return 0; } @@ -381,6 +390,9 @@ static void mipsxx_exit(void) { int counters = op_model_mipsxx_ops.num_counters; + if ((cp0_perfcount_irq >= 0) && (cp0_compare_irq != cp0_perfcount_irq)) + free_irq(cp0_perfcount_irq, save_perf_irq); + counters = counters_per_cpu_to_total(counters); on_each_cpu(reset_counters, (void *)(long)counters, 1); |