Rev 1019 | Details | Compare with Previous | Last modification | View Log | RSS feed
| 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 | |||
| 1019 | mauro | 13 | //#define DEBUG_LINUX_INT |
| 14 | |||
| 847 | giacomo | 15 | struct int_handler { |
| 16 | void (*func)(int, void *dev_id, struct pt_regs *); |
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| 17 | void *data; |
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| 18 | int flags; |
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| 19 | struct int_handler *next; |
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| 20 | }; |
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| 21 | |||
| 22 | static struct irq_handler_list { |
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| 23 | struct int_handler *handlers; |
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| 24 | } irq_list[MAX_IRQS]; |
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| 25 | |||
| 26 | void init_linux_irq(); |
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| 27 | extern void fast_call_intr(int no); |
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| 28 | extern void* malloc(int size); |
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| 29 | extern void free(void *ptr); |
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| 30 | extern int handler_set(int no, void (*fast)(int), int pi, BYTE lock); |
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| 31 | extern int handler_remove(int no); |
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| 32 | |||
| 33 | unsigned long intr_count = 0; |
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| 34 | static int init = 0; |
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| 35 | |||
| 495 | giacomo | 36 | /* |
| 847 | giacomo | 37 | * Generic Linux interrupt handler. |
| 38 | */ |
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| 513 | giacomo | 39 | void linux_intr(int irq) |
| 495 | giacomo | 40 | { |
| 847 | giacomo | 41 | struct pt_regs regs; |
| 42 | struct int_handler *ihp; |
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| 43 | |||
| 44 | intr_count++; |
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| 45 | |||
| 1019 | mauro | 46 | #ifdef DEBUG_LINUX_INT |
| 47 | printk("(linux_intr %d)", irq); |
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| 48 | #endif |
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| 956 | mauro | 49 | |
| 847 | giacomo | 50 | ihp=irq_list[irq].handlers; |
| 51 | while (ihp) { |
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| 52 | (*ihp->func)(irq, ihp->data, ®s); |
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| 53 | ihp=ihp->next; |
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| 54 | } |
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| 55 | |||
| 56 | intr_count--; |
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| 57 | |||
| 495 | giacomo | 58 | } |
| 59 | |||
| 847 | giacomo | 60 | void add_list(struct int_handler** headp, struct int_handler *ihp) |
| 61 | { |
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| 62 | if (*headp == NULL) { |
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| 63 | *headp=ihp; |
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| 64 | return; |
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| 65 | } |
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| 66 | ihp->next=*headp; |
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| 67 | *headp=ihp; |
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| 68 | } |
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| 69 | |||
| 495 | giacomo | 70 | /* |
| 847 | giacomo | 71 | * Attach a handler to an IRQ. |
| 72 | */ |
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| 495 | giacomo | 73 | int request_irq(unsigned int irq, void (*handler)(int, void *dev_id, struct pt_regs *), unsigned long flags, const char *device, void *dev_id) |
| 74 | { |
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| 847 | giacomo | 75 | struct int_handler *ihp; |
| 76 | |||
| 77 | if (init == 0) |
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| 78 | init_linux_irq(); |
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| 79 | |||
| 80 | ihp=malloc(sizeof(struct int_handler)); |
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| 81 | if (ihp == NULL) |
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| 82 | return -ENOMEM; |
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| 83 | |||
| 84 | if (irq_list[irq].handlers == NULL) |
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| 85 | { |
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| 1007 | mauro | 86 | //* Warning: check if irq is used from somebody that doesn't share! (Claudio ?!?) |
| 87 | shark_handler_set(irq, linux_intr); |
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| 88 | //shark_handler_set(irq, NULL, NULL); |
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| 89 | |||
| 1019 | mauro | 90 | #ifdef DEBUG_LINUX_INT |
| 91 | printk("(request_irq %d)", irq); |
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| 92 | #endif |
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| 847 | giacomo | 93 | } |
| 94 | ihp->func = handler; |
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| 95 | ihp->flags = flags; |
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| 96 | ihp->data = dev_id; |
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| 97 | ihp->next = NULL; |
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| 98 | add_list(&irq_list[irq].handlers, ihp); |
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| 99 | |||
| 495 | giacomo | 100 | return 0; |
| 101 | } |
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| 102 | |||
| 103 | /* |
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| 847 | giacomo | 104 | * Deallocate an irq |
| 105 | */ |
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| 106 | void free_irq(unsigned int irq, void *dev_id) |
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| 495 | giacomo | 107 | { |
| 847 | giacomo | 108 | struct int_handler **headp, *ihp; |
| 513 | giacomo | 109 | |
| 847 | giacomo | 110 | headp=&irq_list[irq].handlers; |
| 111 | while (*headp) |
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| 112 | { |
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| 113 | ihp=*headp; |
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| 114 | if (ihp->data == dev_id) |
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| 115 | { |
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| 116 | *headp=ihp->next; |
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| 117 | free(ihp); |
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| 118 | break; |
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| 119 | } |
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| 120 | headp=&ihp->next; |
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| 121 | } |
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| 513 | giacomo | 122 | |
| 847 | giacomo | 123 | if (irq_list[irq].handlers == NULL) |
| 124 | { |
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| 1007 | mauro | 125 | shark_handler_remove(irq); |
| 126 | |||
| 1019 | mauro | 127 | #ifdef DEBUG_LINUX_INT |
| 128 | printk("(free_irq %d)", irq); |
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| 129 | #endif |
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| 847 | giacomo | 130 | } |
| 495 | giacomo | 131 | } |
| 847 | giacomo | 132 | |
| 133 | void init_linux_irq() |
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| 134 | { |
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| 135 | int i; |
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| 136 | |||
| 137 | for (i=0; i<MAX_IRQS; i++) |
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| 138 | { |
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| 139 | irq_list[i].handlers = NULL; |
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| 140 | } |
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| 141 | init=1; |
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| 142 | } |