Commit 24653515 authored by Huacai Chen's avatar Huacai Chen Committed by Ralf Baechle
Browse files

MIPS: Loongson-3: Adjust irq dispatch to speedup processing 



This patch adjust the logic in mach_irq_dispatch(), allow multiple IPs
handled in the same dispatching. This can speedup interrupt processing.

Signed-off-by: default avatarHuacai Chen <chenhc@lemote.com>
Cc: Aurelien Jarno <aurelien@aurel32.net>
Cc: Steven J . Hill <sjhill@realitydiluted.com>
Cc: Fuxin Zhang <zhangfx@lemote.com>
Cc: Zhangjin Wu <wuzhangjin@gmail.com>
Cc: linux-mips@linux-mips.org
Patchwork: https://patchwork.linux-mips.org/patch/12891/


Signed-off-by: default avatarRalf Baechle <ralf@linux-mips.org>
parent d0514728

arch/mips/loongson64/loongson-3/irq.c

+6 −4
Original line number Diff line number Diff line
@@ -24,19 +24,21 @@ static void ht_irqdispatch(void) 
	}

}



#define UNUSED_IPS (CAUSEF_IP5 | CAUSEF_IP4 | CAUSEF_IP1 | CAUSEF_IP0)



void mach_irq_dispatch(unsigned int pending)

{

	if (pending & CAUSEF_IP7)

		do_IRQ(LOONGSON_TIMER_IRQ);

#if defined(CONFIG_SMP)

	else if (pending & CAUSEF_IP6)

	if (pending & CAUSEF_IP6)

		loongson3_ipi_interrupt(NULL);

#endif

	else if (pending & CAUSEF_IP3)

	if (pending & CAUSEF_IP3)

		ht_irqdispatch();

	else if (pending & CAUSEF_IP2)

	if (pending & CAUSEF_IP2)

		do_IRQ(LOONGSON_UART_IRQ);

	else {

	if (pending & UNUSED_IPS) {

		pr_err("%s : spurious interrupt\n", __func__);

		spurious_interrupt();

	}