[mirror_ubuntu-bionic-kernel.git] / arch / arc / plat-arcfpga / irq.c

/*
 * ARC FPGA Platform IRQ hookups
 *
 * Copyright (C) 2012 Synopsys, Inc. (www.synopsys.com)
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License version 2 as
 * published by the Free Software Foundation.
 */

#include <linux/interrupt.h>
#include <asm/irq.h>

void __init plat_fpga_init_IRQ(void)
{
	/*
	 * SMP Hack because UART IRQ hardwired to cpu0 (boot-cpu) but if the
	 * request_irq() comes from any other CPU, the low level IRQ unamsking
	 * essential for getting Interrupts won't be enabled on cpu0, locking
	 * up the UART state machine.
	 */
#ifdef CONFIG_SMP
	arch_unmask_irq(UART0_IRQ);
#endif
}
Commit	Line	Data
bacdf480 VG	1	/*
	2	* ARC FPGA Platform IRQ hookups
	3	*
	4	* Copyright (C) 2012 Synopsys, Inc. (www.synopsys.com)
	5	*
	6	* This program is free software; you can redistribute it and/or modify
	7	* it under the terms of the GNU General Public License version 2 as
	8	* published by the Free Software Foundation.
	9	*/
	10
	11	#include <linux/interrupt.h>
41195d23	12	#include <asm/irq.h>
bacdf480	13
877768c8	14	void __init plat_fpga_init_IRQ(void)
bacdf480	15	{
41195d23 VG	16	/*
	17	* SMP Hack because UART IRQ hardwired to cpu0 (boot-cpu) but if the
	18	* request_irq() comes from any other CPU, the low level IRQ unamsking
	19	* essential for getting Interrupts won't be enabled on cpu0, locking
	20	* up the UART state machine.
	21	*/
	22	#ifdef CONFIG_SMP
	23	arch_unmask_irq(UART0_IRQ);
	24	#endif
bacdf480	25	}