pbrook | cdbdb64 | 2006-04-09 01:32:52 +0000 | [diff] [blame^] | 1 | /* |
| 2 | * Generic ARM Programmable Interrupt Controller support. |
| 3 | * |
| 4 | * Copyright (c) 2006 CodeSourcery. |
| 5 | * Written by Paul Brook |
| 6 | * |
| 7 | * This code is licenced under the LGPL |
| 8 | */ |
| 9 | |
| 10 | #include "vl.h" |
| 11 | #include "arm_pic.h" |
| 12 | |
| 13 | /* Stub functions for hardware that doesn't exist. */ |
| 14 | void pic_set_irq(int irq, int level) |
| 15 | { |
| 16 | cpu_abort(cpu_single_env, "pic_set_irq"); |
| 17 | } |
| 18 | |
| 19 | void pic_info(void) |
| 20 | { |
| 21 | } |
| 22 | |
| 23 | void irq_info(void) |
| 24 | { |
| 25 | } |
| 26 | |
| 27 | |
| 28 | void pic_set_irq_new(void *opaque, int irq, int level) |
| 29 | { |
| 30 | arm_pic_handler *p = (arm_pic_handler *)opaque; |
| 31 | /* Call the real handler. */ |
| 32 | (*p)(opaque, irq, level); |
| 33 | } |
| 34 | |
| 35 | /* Model the IRQ/FIQ CPU interrupt lines as a two input interrupt controller. |
| 36 | Input 0 is IRQ and input 1 is FIQ. */ |
| 37 | typedef struct |
| 38 | { |
| 39 | arm_pic_handler handler; |
| 40 | CPUState *cpu_env; |
| 41 | } arm_pic_cpu_state; |
| 42 | |
| 43 | static void arm_pic_cpu_handler(void *opaque, int irq, int level) |
| 44 | { |
| 45 | arm_pic_cpu_state *s = (arm_pic_cpu_state *)opaque; |
| 46 | switch (irq) { |
| 47 | case ARM_PIC_CPU_IRQ: |
| 48 | if (level) |
| 49 | cpu_interrupt(s->cpu_env, CPU_INTERRUPT_HARD); |
| 50 | else |
| 51 | cpu_reset_interrupt(s->cpu_env, CPU_INTERRUPT_HARD); |
| 52 | break; |
| 53 | case ARM_PIC_CPU_FIQ: |
| 54 | if (level) |
| 55 | cpu_interrupt(s->cpu_env, CPU_INTERRUPT_FIQ); |
| 56 | else |
| 57 | cpu_reset_interrupt(s->cpu_env, CPU_INTERRUPT_FIQ); |
| 58 | break; |
| 59 | default: |
| 60 | cpu_abort(s->cpu_env, "arm_pic_cpu_handler: Bad interrput line %d\n", |
| 61 | irq); |
| 62 | } |
| 63 | } |
| 64 | |
| 65 | void *arm_pic_init_cpu(CPUState *env) |
| 66 | { |
| 67 | arm_pic_cpu_state *s; |
| 68 | |
| 69 | s = (arm_pic_cpu_state *)malloc(sizeof(arm_pic_cpu_state)); |
| 70 | s->handler = arm_pic_cpu_handler; |
| 71 | s->cpu_env = env; |
| 72 | return s; |
| 73 | } |