Messages in this thread Patch in this message | | | Date | Thu, 8 Nov 2007 10:28:06 +0100 | From | Philippe Elie <> | Subject | Re: [RFC/PATCH] AVR32: Oprofile support |
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On Wed, 07 Nov 2007 at 15:05 +0000, Haavard Skinnemoen wrote:
> This adds the necessary architecture code to run oprofile on AVR32 > using the performance counters documented by the AVR32 Architecture > Manual. > > Signed-off-by: Haavard Skinnemoen <hskinnemoen@atmel.com>
> --- /dev/null > +++ b/arch/avr32/oprofile/op_model_avr32.c > @@ -0,0 +1,235 @@ > +/*
> +static irqreturn_t avr32_perf_counter_interrupt(int irq, void *dev_id) > +{ > + struct avr32_perf_counter *ctr = dev_id; > + struct pt_regs *regs; > + u32 pccr; > + > + if (likely(!(intc_get_pending(AVR32_PERFCTR_IRQ_GROUP) > + & (1 << AVR32_PERFCTR_IRQ_LINE)))) > + return IRQ_NONE; > + > + regs = get_irq_regs(); > + pccr = sysreg_read(PCCR); > + > + /* Clear the interrupt flags we're about to handle */ > + sysreg_write(PCCR, pccr); > + > + /* PCCNT */ > + if (ctr->enabled && (pccr & ctr->flag_mask)) { > + sysreg_write(PCCNT, -ctr->count); > + oprofile_add_sample(regs, PCCNT); > + } > + ctr++; > + /* PCNT0 */ > + if (ctr->enabled && (pccr & ctr->flag_mask)) { > + sysreg_write(PCNT0, -ctr->count); > + oprofile_add_sample(regs, PCNT0); > + } > + ctr++; > + /* PCNT1 */ > + if (ctr->enabled && (pccr & ctr->flag_mask)) { > + sysreg_write(PCNT1, -ctr->count); > + oprofile_add_sample(regs, PCNT1); > + }
Why not a loop here ?
-- regards, Phe
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