52 lines
1.2 KiB
C
52 lines
1.2 KiB
C
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// SPDX-License-Identifier: GPL-2.0-only
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/*
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* Copyright (C) 2011-12 Synopsys, Inc. (www.synopsys.com)
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*/
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#include <linux/interrupt.h>
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#include <linux/irqchip.h>
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#include <asm/mach_desc.h>
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#include <asm/irq_regs.h>
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#include <asm/smp.h>
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/*
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* Late Interrupt system init called from start_kernel for Boot CPU only
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*
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* Since slab must already be initialized, platforms can start doing any
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* needed request_irq( )s
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*/
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void __init init_IRQ(void)
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{
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/*
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* process the entire interrupt tree in one go
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* Any external intc will be setup provided DT chains them
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* properly
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*/
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irqchip_init();
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#ifdef CONFIG_SMP
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/* a SMP H/w block could do IPI IRQ request here */
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if (plat_smp_ops.init_per_cpu)
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plat_smp_ops.init_per_cpu(smp_processor_id());
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#endif
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if (machine_desc->init_per_cpu)
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machine_desc->init_per_cpu(smp_processor_id());
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}
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/*
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* "C" Entry point for any ARC ISR, called from low level vector handler
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* @irq is the vector number read from ICAUSE reg of on-chip intc
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*/
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void arch_do_IRQ(unsigned int hwirq, struct pt_regs *regs)
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{
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struct pt_regs *old_regs;
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irq_enter();
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old_regs = set_irq_regs(regs);
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generic_handle_domain_irq(NULL, hwirq);
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set_irq_regs(old_regs);
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irq_exit();
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}
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