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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 | |||
| 526 | giacomo | 7 | extern void *int_arg_table[MAX_INT_TABLE]; |
| 8 | extern void *int_func_table[MAX_INT_TABLE]; |
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| 495 | giacomo | 9 | |
| 847 | giacomo | 10 | #define MAX_IRQS 16 |
| 11 | |||
| 12 | #ifndef NIL |
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| 13 | #define NIL -1 /*+ integer unvalid value +*/ |
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| 14 | #endif |
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| 15 | |||
| 16 | struct int_handler { |
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| 17 | void (*func)(int, void *dev_id, struct pt_regs *); |
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| 18 | void *data; |
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| 19 | int flags; |
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| 20 | struct int_handler *next; |
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| 21 | }; |
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| 22 | |||
| 23 | static struct irq_handler_list { |
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| 24 | struct int_handler *handlers; |
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| 25 | } irq_list[MAX_IRQS]; |
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| 26 | |||
| 27 | void init_linux_irq(); |
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| 28 | extern void fast_call_intr(int no); |
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| 29 | extern void* malloc(int size); |
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| 30 | extern void free(void *ptr); |
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| 31 | extern int handler_set(int no, void (*fast)(int), int pi, BYTE lock); |
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| 32 | extern int handler_remove(int no); |
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| 33 | |||
| 34 | unsigned long intr_count = 0; |
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| 35 | static int init = 0; |
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| 36 | |||
| 495 | giacomo | 37 | /* |
| 847 | giacomo | 38 | * Generic Linux interrupt handler. |
| 39 | */ |
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| 513 | giacomo | 40 | void linux_intr(int irq) |
| 495 | giacomo | 41 | { |
| 847 | giacomo | 42 | struct pt_regs regs; |
| 43 | struct int_handler *ihp; |
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| 44 | |||
| 45 | intr_count++; |
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| 46 | |||
| 47 | ihp=irq_list[irq].handlers; |
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| 48 | while (ihp) { |
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| 49 | (*ihp->func)(irq, ihp->data, ®s); |
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| 50 | ihp=ihp->next; |
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| 51 | } |
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| 52 | |||
| 53 | intr_count--; |
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| 54 | |||
| 495 | giacomo | 55 | } |
| 56 | |||
| 847 | giacomo | 57 | void add_list(struct int_handler** headp, struct int_handler *ihp) |
| 58 | { |
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| 59 | if (*headp == NULL) { |
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| 60 | *headp=ihp; |
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| 61 | return; |
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| 62 | } |
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| 63 | ihp->next=*headp; |
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| 64 | *headp=ihp; |
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| 65 | } |
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| 66 | |||
| 67 | #define USE_IRQ_SERVER |
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| 68 | |||
| 495 | giacomo | 69 | /* |
| 847 | giacomo | 70 | * Attach a handler to an IRQ. |
| 71 | */ |
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| 495 | giacomo | 72 | int request_irq(unsigned int irq, void (*handler)(int, void *dev_id, struct pt_regs *), unsigned long flags, const char *device, void *dev_id) |
| 73 | { |
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| 847 | giacomo | 74 | struct int_handler *ihp; |
| 75 | |||
| 76 | if (init == 0) |
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| 77 | init_linux_irq(); |
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| 78 | |||
| 79 | ihp=malloc(sizeof(struct int_handler)); |
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| 80 | if (ihp == NULL) |
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| 81 | return -ENOMEM; |
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| 82 | |||
| 83 | if (irq_list[irq].handlers == NULL) |
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| 84 | { |
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| 85 | //* Warning: check if irq is used from somebody that doesn't share! |
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| 86 | #ifdef USE_IRQ_SERVER |
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| 87 | shark_handler_set(irq, NULL, NULL); |
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| 88 | #else |
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| 89 | handler_set(irq, linux_intr, NIL, TRUE); |
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| 90 | #endif |
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| 91 | } |
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| 92 | ihp->func = handler; |
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| 93 | ihp->flags = flags; |
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| 94 | ihp->data = dev_id; |
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| 95 | ihp->next = NULL; |
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| 96 | add_list(&irq_list[irq].handlers, ihp); |
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| 97 | |||
| 495 | giacomo | 98 | return 0; |
| 99 | } |
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| 100 | |||
| 101 | /* |
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| 847 | giacomo | 102 | * Deallocate an irq |
| 103 | */ |
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| 104 | void free_irq(unsigned int irq, void *dev_id) |
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| 495 | giacomo | 105 | { |
| 847 | giacomo | 106 | struct int_handler **headp, *ihp; |
| 513 | giacomo | 107 | |
| 847 | giacomo | 108 | headp=&irq_list[irq].handlers; |
| 109 | while (*headp) |
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| 110 | { |
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| 111 | ihp=*headp; |
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| 112 | if (ihp->data == dev_id) |
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| 113 | { |
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| 114 | *headp=ihp->next; |
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| 115 | free(ihp); |
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| 116 | break; |
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| 117 | } |
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| 118 | headp=&ihp->next; |
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| 119 | } |
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| 513 | giacomo | 120 | |
| 847 | giacomo | 121 | if (irq_list[irq].handlers == NULL) |
| 122 | { |
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| 123 | handler_remove(irq); |
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| 124 | } |
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| 495 | giacomo | 125 | } |
| 847 | giacomo | 126 | |
| 127 | void init_linux_irq() |
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| 128 | { |
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| 129 | int i; |
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| 130 | |||
| 131 | for (i=0; i<MAX_IRQS; i++) |
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| 132 | { |
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| 133 | irq_list[i].handlers = NULL; |
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| 134 | } |
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| 135 | init=1; |
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| 136 | } |