| Andrew Scull | b4b6d4a | 2019-01-02 15:54:55 +0000 | [diff] [blame^] | 1 | /* |
| 2 | * Copyright (C) 2000, 2001, 2004 MIPS Technologies, Inc. |
| 3 | * Copyright (C) 2001 Ralf Baechle |
| 4 | * Copyright (C) 2010 PMC-Sierra, Inc. |
| 5 | * |
| 6 | * VSMP support for MSP platforms . Derived from malta vsmp support. |
| 7 | * |
| 8 | * This program is free software; you can distribute it and/or modify it |
| 9 | * under the terms of the GNU General Public License (Version 2) as |
| 10 | * published by the Free Software Foundation. |
| 11 | * |
| 12 | * This program is distributed in the hope it will be useful, but WITHOUT |
| 13 | * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
| 14 | * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
| 15 | * for more details. |
| 16 | * |
| 17 | * You should have received a copy of the GNU General Public License along |
| 18 | * with this program; if not, write to the Free Software Foundation, Inc., |
| 19 | * 59 Temple Place - Suite 330, Boston MA 02111-1307, USA. |
| 20 | * |
| 21 | */ |
| 22 | #include <linux/smp.h> |
| 23 | #include <linux/interrupt.h> |
| 24 | |
| 25 | #include <asm/setup.h> |
| 26 | |
| 27 | #ifdef CONFIG_MIPS_MT_SMP |
| 28 | #define MIPS_CPU_IPI_RESCHED_IRQ 0 /* SW int 0 for resched */ |
| 29 | #define MIPS_CPU_IPI_CALL_IRQ 1 /* SW int 1 for call */ |
| 30 | |
| 31 | |
| 32 | static void ipi_resched_dispatch(void) |
| 33 | { |
| 34 | do_IRQ(MIPS_CPU_IPI_RESCHED_IRQ); |
| 35 | } |
| 36 | |
| 37 | static void ipi_call_dispatch(void) |
| 38 | { |
| 39 | do_IRQ(MIPS_CPU_IPI_CALL_IRQ); |
| 40 | } |
| 41 | |
| 42 | static irqreturn_t ipi_resched_interrupt(int irq, void *dev_id) |
| 43 | { |
| 44 | return IRQ_HANDLED; |
| 45 | } |
| 46 | |
| 47 | static irqreturn_t ipi_call_interrupt(int irq, void *dev_id) |
| 48 | { |
| 49 | generic_smp_call_function_interrupt(); |
| 50 | |
| 51 | return IRQ_HANDLED; |
| 52 | } |
| 53 | |
| 54 | static struct irqaction irq_resched = { |
| 55 | .handler = ipi_resched_interrupt, |
| 56 | .flags = IRQF_PERCPU, |
| 57 | .name = "IPI_resched" |
| 58 | }; |
| 59 | |
| 60 | static struct irqaction irq_call = { |
| 61 | .handler = ipi_call_interrupt, |
| 62 | .flags = IRQF_PERCPU, |
| 63 | .name = "IPI_call" |
| 64 | }; |
| 65 | |
| 66 | void __init arch_init_ipiirq(int irq, struct irqaction *action) |
| 67 | { |
| 68 | setup_irq(irq, action); |
| 69 | irq_set_handler(irq, handle_percpu_irq); |
| 70 | } |
| 71 | |
| 72 | void __init msp_vsmp_int_init(void) |
| 73 | { |
| 74 | set_vi_handler(MIPS_CPU_IPI_RESCHED_IRQ, ipi_resched_dispatch); |
| 75 | set_vi_handler(MIPS_CPU_IPI_CALL_IRQ, ipi_call_dispatch); |
| 76 | arch_init_ipiirq(MIPS_CPU_IPI_RESCHED_IRQ, &irq_resched); |
| 77 | arch_init_ipiirq(MIPS_CPU_IPI_CALL_IRQ, &irq_call); |
| 78 | } |
| 79 | #endif /* CONFIG_MIPS_MT_SMP */ |