| 1 | |
| 2 | |
| 3 | * Copyright (C) 2011-12 Synopsys, Inc. (www.synopsys.com)
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| 4 |
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| 5 |
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| 6 | #include <linux/interrupt.h>
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| 7 | #include <linux/irqchip.h>
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| 8 | #include <asm/mach_desc.h>
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| 9 |
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| 10 | #include <asm/irq_regs.h>
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| 11 | #include <asm/smp.h>
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| 12 |
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| 13 | |
| 14 | * Late Interrupt system init called from start_kernel for Boot CPU only
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| 15 | *
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| 16 | * Since slab must already be initialized, platforms can start doing any
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| 17 | * needed request_irq( )s
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| 18 |
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| 19 | void __init init_IRQ(void)
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| 20 | {
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| 21 | |
| 22 | * process the entire interrupt tree in one go
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| 23 | * Any external intc will be setup provided DT chains them
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| 24 | * properly
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| 25 |
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| 26 | irqchip_init();
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| 27 |
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| 28 | #ifdef CONFIG_SMP
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| 29 |
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| 30 | if (plat_smp_ops.init_per_cpu)
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| 31 | plat_smp_ops.init_per_cpu(smp_processor_id());
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| 32 | #endif
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| 33 |
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| 34 | if (machine_desc->init_per_cpu)
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| 35 | machine_desc->init_per_cpu(smp_processor_id());
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| 36 | }
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| 37 |
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| 38 | |
| 39 | * "C" Entry point for any ARC ISR, called from low level vector handler
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| 40 | * @irq is the vector number read from ICAUSE reg of on-chip intc
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| 41 |
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| 42 | void arch_do_IRQ(unsigned int hwirq, struct pt_regs *regs)
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| 43 | {
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| 44 | struct pt_regs *old_regs;
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| 45 |
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| 46 | irq_enter();
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| 47 | old_regs = set_irq_regs(regs);
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| 48 | generic_handle_domain_irq(NULL, hwirq);
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| 49 | set_irq_regs(old_regs);
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| 50 | irq_exit();
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| 51 | }
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