/* * Copyright (C) 2011-12 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 <linux/irqchip.h> #include <asm/mach_desc.h> #include <asm/smp.h> /* * Late Interrupt system init called from start_kernel for Boot CPU only * * Since slab must already be initialized, platforms can start doing any * needed request_irq( )s */ void __init init_IRQ(void) { /* * process the entire interrupt tree in one go * Any external intc will be setup provided DT chains them * properly */ irqchip_init(); #ifdef CONFIG_SMP /* a SMP H/w block could do IPI IRQ request here */ if (plat_smp_ops.init_per_cpu) plat_smp_ops.init_per_cpu(smp_processor_id()); #endif if (machine_desc->init_per_cpu) machine_desc->init_per_cpu(smp_processor_id()); } /* * "C" Entry point for any ARC ISR, called from low level vector handler * @irq is the vector number read from ICAUSE reg of on-chip intc */ void arch_do_IRQ(unsigned int hwirq, struct pt_regs *regs) { handle_domain_irq(NULL, hwirq, regs); }