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| Rev | Author | Line No. | Line |
|---|---|---|---|
| 495 | giacomo | 1 | #include <linuxcomp.h> |
| 2 | |||
| 3 | #include <asm/ptrace.h> |
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| 4 | #include <asm-generic/errno-base.h> |
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| 5 | #include <linux/kernel.h> |
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| 6 | |||
| 1007 | mauro | 7 | #define MAX_IRQS (NR_IRQS +1) |
| 495 | giacomo | 8 | |
| 847 | giacomo | 9 | #ifndef NIL |
| 10 | #define NIL -1 /*+ integer unvalid value +*/ |
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| 11 | #endif |
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| 12 | |||
| 13 | struct int_handler { |
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| 14 | void (*func)(int, void *dev_id, struct pt_regs *); |
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| 15 | void *data; |
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| 16 | int flags; |
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| 17 | struct int_handler *next; |
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| 18 | }; |
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| 19 | |||
| 20 | static struct irq_handler_list { |
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| 21 | struct int_handler *handlers; |
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| 22 | } irq_list[MAX_IRQS]; |
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| 23 | |||
| 24 | void init_linux_irq(); |
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| 25 | extern void fast_call_intr(int no); |
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| 26 | extern void* malloc(int size); |
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| 27 | extern void free(void *ptr); |
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| 28 | extern int handler_set(int no, void (*fast)(int), int pi, BYTE lock); |
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| 29 | extern int handler_remove(int no); |
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| 30 | |||
| 31 | unsigned long intr_count = 0; |
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| 32 | static int init = 0; |
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| 33 | |||
| 495 | giacomo | 34 | /* |
| 847 | giacomo | 35 | * Generic Linux interrupt handler. |
| 36 | */ |
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| 513 | giacomo | 37 | void linux_intr(int irq) |
| 495 | giacomo | 38 | { |
| 847 | giacomo | 39 | struct pt_regs regs; |
| 40 | struct int_handler *ihp; |
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| 41 | |||
| 42 | intr_count++; |
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| 43 | |||
| 1007 | mauro | 44 | //cprintf("(linux_intr %d)", irq); |
| 956 | mauro | 45 | |
| 847 | giacomo | 46 | ihp=irq_list[irq].handlers; |
| 47 | while (ihp) { |
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| 48 | (*ihp->func)(irq, ihp->data, ®s); |
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| 49 | ihp=ihp->next; |
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| 50 | } |
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| 51 | |||
| 52 | intr_count--; |
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| 53 | |||
| 495 | giacomo | 54 | } |
| 55 | |||
| 847 | giacomo | 56 | void add_list(struct int_handler** headp, struct int_handler *ihp) |
| 57 | { |
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| 58 | if (*headp == NULL) { |
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| 59 | *headp=ihp; |
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| 60 | return; |
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| 61 | } |
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| 62 | ihp->next=*headp; |
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| 63 | *headp=ihp; |
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| 64 | } |
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| 65 | |||
| 495 | giacomo | 66 | /* |
| 847 | giacomo | 67 | * Attach a handler to an IRQ. |
| 68 | */ |
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| 495 | giacomo | 69 | int request_irq(unsigned int irq, void (*handler)(int, void *dev_id, struct pt_regs *), unsigned long flags, const char *device, void *dev_id) |
| 70 | { |
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| 847 | giacomo | 71 | struct int_handler *ihp; |
| 72 | |||
| 73 | if (init == 0) |
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| 74 | init_linux_irq(); |
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| 75 | |||
| 76 | ihp=malloc(sizeof(struct int_handler)); |
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| 77 | if (ihp == NULL) |
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| 78 | return -ENOMEM; |
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| 79 | |||
| 80 | if (irq_list[irq].handlers == NULL) |
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| 81 | { |
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| 1007 | mauro | 82 | //* Warning: check if irq is used from somebody that doesn't share! (Claudio ?!?) |
| 83 | shark_handler_set(irq, linux_intr); |
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| 84 | //shark_handler_set(irq, NULL, NULL); |
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| 85 | |||
| 86 | //cprintf("(request_irq %d)", irq); |
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| 847 | giacomo | 87 | } |
| 88 | ihp->func = handler; |
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| 89 | ihp->flags = flags; |
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| 90 | ihp->data = dev_id; |
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| 91 | ihp->next = NULL; |
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| 92 | add_list(&irq_list[irq].handlers, ihp); |
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| 93 | |||
| 495 | giacomo | 94 | return 0; |
| 95 | } |
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| 96 | |||
| 97 | /* |
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| 847 | giacomo | 98 | * Deallocate an irq |
| 99 | */ |
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| 100 | void free_irq(unsigned int irq, void *dev_id) |
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| 495 | giacomo | 101 | { |
| 847 | giacomo | 102 | struct int_handler **headp, *ihp; |
| 513 | giacomo | 103 | |
| 847 | giacomo | 104 | headp=&irq_list[irq].handlers; |
| 105 | while (*headp) |
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| 106 | { |
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| 107 | ihp=*headp; |
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| 108 | if (ihp->data == dev_id) |
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| 109 | { |
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| 110 | *headp=ihp->next; |
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| 111 | free(ihp); |
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| 112 | break; |
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| 113 | } |
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| 114 | headp=&ihp->next; |
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| 115 | } |
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| 513 | giacomo | 116 | |
| 847 | giacomo | 117 | if (irq_list[irq].handlers == NULL) |
| 118 | { |
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| 1007 | mauro | 119 | shark_handler_remove(irq); |
| 120 | |||
| 121 | //cprintf("(free_irq %d)", irq); |
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| 847 | giacomo | 122 | } |
| 495 | giacomo | 123 | } |
| 847 | giacomo | 124 | |
| 125 | void init_linux_irq() |
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| 126 | { |
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| 127 | int i; |
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| 128 | |||
| 129 | for (i=0; i<MAX_IRQS; i++) |
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| 130 | { |
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| 131 | irq_list[i].handlers = NULL; |
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| 132 | } |
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| 133 | init=1; |
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| 134 | } |