| // SPDX-License-Identifier: GPL-2.0-only |
| /* |
| * Copyright (C) 2000, 2001, 2004 MIPS Technologies, Inc. |
| * Copyright (C) 2001 Ralf Baechle |
| * Copyright (C) 2010 PMC-Sierra, Inc. |
| * |
| * VSMP support for MSP platforms . Derived from malta vsmp support. |
| */ |
| #include <linux/smp.h> |
| #include <linux/interrupt.h> |
| |
| #include <asm/setup.h> |
| |
| #ifdef CONFIG_MIPS_MT_SMP |
| #define MIPS_CPU_IPI_RESCHED_IRQ 0 /* SW int 0 for resched */ |
| #define MIPS_CPU_IPI_CALL_IRQ 1 /* SW int 1 for call */ |
| |
| |
| static void ipi_resched_dispatch(void) |
| { |
| do_IRQ(MIPS_CPU_IPI_RESCHED_IRQ); |
| } |
| |
| static void ipi_call_dispatch(void) |
| { |
| do_IRQ(MIPS_CPU_IPI_CALL_IRQ); |
| } |
| |
| static irqreturn_t ipi_resched_interrupt(int irq, void *dev_id) |
| { |
| return IRQ_HANDLED; |
| } |
| |
| static irqreturn_t ipi_call_interrupt(int irq, void *dev_id) |
| { |
| generic_smp_call_function_interrupt(); |
| |
| return IRQ_HANDLED; |
| } |
| |
| static struct irqaction irq_resched = { |
| .handler = ipi_resched_interrupt, |
| .flags = IRQF_PERCPU, |
| .name = "IPI_resched" |
| }; |
| |
| static struct irqaction irq_call = { |
| .handler = ipi_call_interrupt, |
| .flags = IRQF_PERCPU, |
| .name = "IPI_call" |
| }; |
| |
| void __init arch_init_ipiirq(int irq, struct irqaction *action) |
| { |
| setup_irq(irq, action); |
| irq_set_handler(irq, handle_percpu_irq); |
| } |
| |
| void __init msp_vsmp_int_init(void) |
| { |
| set_vi_handler(MIPS_CPU_IPI_RESCHED_IRQ, ipi_resched_dispatch); |
| set_vi_handler(MIPS_CPU_IPI_CALL_IRQ, ipi_call_dispatch); |
| arch_init_ipiirq(MIPS_CPU_IPI_RESCHED_IRQ, &irq_resched); |
| arch_init_ipiirq(MIPS_CPU_IPI_CALL_IRQ, &irq_call); |
| } |
| #endif /* CONFIG_MIPS_MT_SMP */ |