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>
12#include <plat/irq.h>
13
14void __init plat_fpga_init_IRQ(void)
15{
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
25}