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>

diff --git a/arch/mips/include/asm/mach-loongson/loongson.h b/arch/mips/include/asm/mach-loongson/loongson.h
index 53ee881..cb6985f 100644 (file)
--- a/arch/mips/include/asm/mach-loongson/loongson.h
+++ b/arch/mips/include/asm/mach-loongson/loongson.h
@@ -62,6 +62,14 @@ extern int mach_i8259_irq(void);
 #define LOONGSON_IRQ_BASE      32
 #define LOONGSON2_PERFCNT_IRQ  (MIPS_CPU_IRQ_BASE + 6) /* cpu perf counter */
 
+#include <linux/interrupt.h>
+static inline void do_perfcnt_IRQ(void)
+{
+#if defined(CONFIG_OPROFILE) || defined(CONFIG_OPROFILE_MODULE)
+       do_IRQ(LOONGSON2_PERFCNT_IRQ);
+#endif
+}
+
 #define LOONGSON_FLASH_BASE    0x1c000000
 #define LOONGSON_FLASH_SIZE    0x02000000      /* 32M */
 #define LOONGSON_FLASH_TOP     (LOONGSON_FLASH_BASE+LOONGSON_FLASH_SIZE-1)

diff --git a/arch/mips/loongson/fuloong-2e/irq.c b/arch/mips/loongson/fuloong-2e/irq.c
index 99e08c3..d61a042 100644 (file)
--- a/arch/mips/loongson/fuloong-2e/irq.c
+++ b/arch/mips/loongson/fuloong-2e/irq.c
@@ -30,7 +30,7 @@ asmlinkage void mach_irq_dispatch(unsigned int pending)
        if (pending & CAUSEF_IP7)
                do_IRQ(MIPS_CPU_IRQ_BASE + 7);
        else if (pending & CAUSEF_IP6) /* perf counter loverflow */
-               do_IRQ(LOONGSON2_PERFCNT_IRQ);
+               do_perfcnt_IRQ();
        else if (pending & CAUSEF_IP5)
                i8259_irqdispatch();
        else if (pending & CAUSEF_IP2)

diff --git a/arch/mips/loongson/lemote-2f/irq.c b/arch/mips/loongson/lemote-2f/irq.c
index c6db7e7..71347d7 100644 (file)
--- a/arch/mips/loongson/lemote-2f/irq.c
+++ b/arch/mips/loongson/lemote-2f/irq.c
@@ -79,9 +79,7 @@ void mach_irq_dispatch(unsigned int pending)
        if (pending & CAUSEF_IP7)
                do_IRQ(LOONGSON_TIMER_IRQ);
        else if (pending & CAUSEF_IP6) {        /* North Bridge, Perf counter */
-#if defined(CONFIG_OPROFILE) || defined(CONFIG_OPROFILE_MODULE)
-               do_IRQ(LOONGSON2_PERFCNT_IRQ);
-#endif
+               do_perfcnt_IRQ();
                bonito_irqdispatch();
        } else if (pending & CAUSEF_IP3)        /* CPU UART */
                do_IRQ(LOONGSON_UART_IRQ);