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MIPS: Loongson: Oprofile: add a new do_perfcnt_IRQ()
On FuLoong-2F IP6 is shared by the performance counter overflow interrupt and the Bonito northbridge interrupt. To reduce overhead only call do_IRQ() when oprofile is enabled to reduce overhead. This patch adds an inline function do_perfcnt_IRQ() to hide the #if's , which can be shared by the other Loongson machines, i.e. gdium. Signed-off-by: Wu Zhangjin <wuzhangjin@gmail.com> Cc: linux-mips@linux-mips.org Patchwork: https://patchwork.linux-mips.org/patch/1492/ Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
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3 changed files with 10 additions and 4 deletions
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@ -62,6 +62,14 @@ extern int mach_i8259_irq(void);
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#define LOONGSON_IRQ_BASE 32
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#define LOONGSON2_PERFCNT_IRQ (MIPS_CPU_IRQ_BASE + 6) /* cpu perf counter */
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#include <linux/interrupt.h>
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static inline void do_perfcnt_IRQ(void)
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{
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#if defined(CONFIG_OPROFILE) || defined(CONFIG_OPROFILE_MODULE)
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do_IRQ(LOONGSON2_PERFCNT_IRQ);
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#endif
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}
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#define LOONGSON_FLASH_BASE 0x1c000000
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#define LOONGSON_FLASH_SIZE 0x02000000 /* 32M */
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#define LOONGSON_FLASH_TOP (LOONGSON_FLASH_BASE+LOONGSON_FLASH_SIZE-1)
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@ -30,7 +30,7 @@ asmlinkage void mach_irq_dispatch(unsigned int pending)
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if (pending & CAUSEF_IP7)
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do_IRQ(MIPS_CPU_IRQ_BASE + 7);
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else if (pending & CAUSEF_IP6) /* perf counter loverflow */
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do_IRQ(LOONGSON2_PERFCNT_IRQ);
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do_perfcnt_IRQ();
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else if (pending & CAUSEF_IP5)
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i8259_irqdispatch();
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else if (pending & CAUSEF_IP2)
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@ -79,9 +79,7 @@ void mach_irq_dispatch(unsigned int pending)
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if (pending & CAUSEF_IP7)
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do_IRQ(LOONGSON_TIMER_IRQ);
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else if (pending & CAUSEF_IP6) { /* North Bridge, Perf counter */
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#if defined(CONFIG_OPROFILE) || defined(CONFIG_OPROFILE_MODULE)
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do_IRQ(LOONGSON2_PERFCNT_IRQ);
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#endif
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do_perfcnt_IRQ();
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bonito_irqdispatch();
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} else if (pending & CAUSEF_IP3) /* CPU UART */
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do_IRQ(LOONGSON_UART_IRQ);
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