| 1 | // SPDX-License-Identifier: GPL-2.0-only |
|---|
| 2 | /* |
|---|
| 3 | * Copyright (C) 2011-12 Synopsys, Inc. (www.synopsys.com) |
|---|
| 4 | */ |
|---|
| 5 | |
|---|
| 6 | #include <linux/interrupt.h> |
|---|
| 7 | #include <linux/irqchip.h> |
|---|
| 8 | #include <asm/mach_desc.h> |
|---|
| 9 | |
|---|
| 10 | #include <asm/irq_regs.h> |
|---|
| 11 | #include <asm/smp.h> |
|---|
| 12 | |
|---|
| 13 | /* |
|---|
| 14 | * Late Interrupt system init called from start_kernel for Boot CPU only |
|---|
| 15 | * |
|---|
| 16 | * Since slab must already be initialized, platforms can start doing any |
|---|
| 17 | * needed request_irq( )s |
|---|
| 18 | */ |
|---|
| 19 | void __init init_IRQ(void) |
|---|
| 20 | { |
|---|
| 21 | /* |
|---|
| 22 | * process the entire interrupt tree in one go |
|---|
| 23 | * Any external intc will be setup provided DT chains them |
|---|
| 24 | * properly |
|---|
| 25 | */ |
|---|
| 26 | irqchip_init(); |
|---|
| 27 | |
|---|
| 28 | #ifdef CONFIG_SMP |
|---|
| 29 | /* a SMP H/w block could do IPI IRQ request here */ |
|---|
| 30 | if (plat_smp_ops.init_per_cpu) |
|---|
| 31 | plat_smp_ops.init_per_cpu(smp_processor_id()); |
|---|
| 32 | #endif |
|---|
| 33 | |
|---|
| 34 | if (machine_desc->init_per_cpu) |
|---|
| 35 | machine_desc->init_per_cpu(smp_processor_id()); |
|---|
| 36 | } |
|---|
| 37 | |
|---|
| 38 | /* |
|---|
| 39 | * "C" Entry point for any ARC ISR, called from low level vector handler |
|---|
| 40 | * @irq is the vector number read from ICAUSE reg of on-chip intc |
|---|
| 41 | */ |
|---|
| 42 | void arch_do_IRQ(unsigned int hwirq, struct pt_regs *regs) |
|---|
| 43 | { |
|---|
| 44 | struct pt_regs *old_regs; |
|---|
| 45 | |
|---|
| 46 | irq_enter(); |
|---|
| 47 | old_regs = set_irq_regs(regs); |
|---|
| 48 | generic_handle_domain_irq(NULL, hwirq); |
|---|
| 49 | set_irq_regs(old_regs); |
|---|
| 50 | irq_exit(); |
|---|
| 51 | } |
|---|
| 52 | |
|---|
