projects / deliverable / linux.git / blame
| Commit | Line | Data |
|---|---|---|
| 1da177e4 LT |
1 | /* |
| 2 | * IRQ vector handles | |
| 3 | * | |
| 4 | * This file is subject to the terms and conditions of the GNU General Public | |
| 5 | * License. See the file "COPYING" in the main directory of this archive | |
| 6 | * for more details. | |
| 7 | * | |
| 8 | * Copyright (C) 1995, 1996, 1997, 2003 by Ralf Baechle | |
| 9 | */ | |
| 10 | #include <linux/kernel.h> | |
| 11 | #include <linux/init.h> | |
| 12 | #include <linux/irq.h> | |
| c4ed38a0 RB |
13 | #include <linux/interrupt.h> |
| 14 | #include <linux/pci.h> | |
| 1da177e4 LT |
15 | |
| 16 | #include <asm/i8259.h> | |
| 17 | #include <asm/irq_cpu.h> | |
| d5ab1a69 | 18 | #include <asm/irq_gt641xx.h> |
| 1da177e4 | 19 | #include <asm/gt64120.h> |
| 1da177e4 | 20 | |
| d5ab1a69 | 21 | #include <irq.h> |
| c4ed38a0 | 22 | |
| 937a8015 | 23 | asmlinkage void plat_irq_dispatch(void) |
| c4ed38a0 | 24 | { |
| d5ab1a69 YY |
25 | unsigned pending = read_c0_status() & read_c0_cause() & ST0_IM; |
| 26 | int irq; | |
| 937a8015 | 27 | |
| d5ab1a69 YY |
28 | if (pending & CAUSEF_IP2) |
| 29 | gt641xx_irq_dispatch(); | |
| 30 | else if (pending & CAUSEF_IP6) { | |
| 31 | irq = i8259_irq(); | |
| 32 | if (irq < 0) | |
| 33 | spurious_interrupt(); | |
| 34 | else | |
| 35 | do_IRQ(irq); | |
| 36 | } else if (pending & CAUSEF_IP3) | |
| 37 | do_IRQ(MIPS_CPU_IRQ_BASE + 3); | |
| 38 | else if (pending & CAUSEF_IP4) | |
| 39 | do_IRQ(MIPS_CPU_IRQ_BASE + 4); | |
| 40 | else if (pending & CAUSEF_IP5) | |
| 41 | do_IRQ(MIPS_CPU_IRQ_BASE + 5); | |
| 42 | else if (pending & CAUSEF_IP7) | |
| 43 | do_IRQ(MIPS_CPU_IRQ_BASE + 7); | |
| 44 | else | |
| 45 | spurious_interrupt(); | |
| c4ed38a0 RB |
46 | } |
| 47 | ||
| d5ab1a69 YY |
48 | static struct irqaction cascade = { |
| 49 | .handler = no_action, | |
| d5ab1a69 | 50 | .name = "cascade", |
| 5a4a4ad8 | 51 | .flags = IRQF_NO_THREAD, |
| c4ed38a0 RB |
52 | }; |
| 53 | ||
| 1da177e4 LT |
54 | void __init arch_init_irq(void) |
| 55 | { | |
| d5ab1a69 YY |
56 | mips_cpu_irq_init(); |
| 57 | gt641xx_irq_init(); | |
| 58 | init_i8259_irqs(); | |
| c4ed38a0 | 59 | |
| d5ab1a69 YY |
60 | setup_irq(GT641XX_CASCADE_IRQ, &cascade); |
| 61 | setup_irq(I8259_CASCADE_IRQ, &cascade); | |
| 1da177e4 | 62 | } |