Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1 | #ifndef _M68K_IRQ_H_ |
| 2 | #define _M68K_IRQ_H_ |
| 3 | |
| 4 | #include <linux/config.h> |
| 5 | #include <linux/interrupt.h> |
| 6 | #include <asm/ptrace.h> |
| 7 | |
| 8 | #ifdef CONFIG_COLDFIRE |
| 9 | /* |
| 10 | * On the ColdFire we keep track of all vectors. That way drivers |
| 11 | * can register whatever vector number they wish, and we can deal |
| 12 | * with it. |
| 13 | */ |
| 14 | #define SYS_IRQS 256 |
| 15 | #define NR_IRQS SYS_IRQS |
| 16 | |
| 17 | #else |
| 18 | |
| 19 | /* |
| 20 | * # of m68k interrupts |
| 21 | */ |
| 22 | #define SYS_IRQS 8 |
| 23 | #define NR_IRQS (24+SYS_IRQS) |
| 24 | |
| 25 | #endif /* CONFIG_COLDFIRE */ |
| 26 | |
| 27 | /* |
| 28 | * Interrupt source definitions |
| 29 | * General interrupt sources are the level 1-7. |
| 30 | * Adding an interrupt service routine for one of these sources |
| 31 | * results in the addition of that routine to a chain of routines. |
| 32 | * Each one is called in succession. Each individual interrupt |
| 33 | * service routine should determine if the device associated with |
| 34 | * that routine requires service. |
| 35 | */ |
| 36 | |
| 37 | #define IRQ1 (1) /* level 1 interrupt */ |
| 38 | #define IRQ2 (2) /* level 2 interrupt */ |
| 39 | #define IRQ3 (3) /* level 3 interrupt */ |
| 40 | #define IRQ4 (4) /* level 4 interrupt */ |
| 41 | #define IRQ5 (5) /* level 5 interrupt */ |
| 42 | #define IRQ6 (6) /* level 6 interrupt */ |
| 43 | #define IRQ7 (7) /* level 7 interrupt (non-maskable) */ |
| 44 | |
| 45 | /* |
| 46 | * Machine specific interrupt sources. |
| 47 | * |
| 48 | * Adding an interrupt service routine for a source with this bit |
| 49 | * set indicates a special machine specific interrupt source. |
| 50 | * The machine specific files define these sources. |
| 51 | * |
| 52 | * The IRQ_MACHSPEC bit is now gone - the only thing it did was to |
| 53 | * introduce unnecessary overhead. |
| 54 | * |
| 55 | * All interrupt handling is actually machine specific so it is better |
| 56 | * to use function pointers, as used by the Sparc port, and select the |
| 57 | * interrupt handling functions when initializing the kernel. This way |
| 58 | * we save some unnecessary overhead at run-time. |
| 59 | * 01/11/97 - Jes |
| 60 | */ |
| 61 | |
| 62 | extern void (*mach_enable_irq)(unsigned int); |
| 63 | extern void (*mach_disable_irq)(unsigned int); |
| 64 | |
| 65 | /* |
| 66 | * various flags for request_irq() - the Amiga now uses the standard |
| 67 | * mechanism like all other architectures - SA_INTERRUPT and SA_SHIRQ |
| 68 | * are your friends. |
| 69 | */ |
| 70 | #define IRQ_FLG_LOCK (0x0001) /* handler is not replaceable */ |
| 71 | #define IRQ_FLG_REPLACE (0x0002) /* replace existing handler */ |
| 72 | #define IRQ_FLG_FAST (0x0004) |
| 73 | #define IRQ_FLG_SLOW (0x0008) |
| 74 | #define IRQ_FLG_STD (0x8000) /* internally used */ |
| 75 | |
| 76 | #ifdef CONFIG_M68360 |
| 77 | |
| 78 | #define CPM_INTERRUPT IRQ4 |
| 79 | |
| 80 | /* see MC68360 User's Manual, p. 7-377 */ |
| 81 | #define CPM_VECTOR_BASE 0x04 /* 3 MSbits of CPM vector */ |
| 82 | |
| 83 | #endif /* CONFIG_M68360 */ |
| 84 | |
| 85 | /* |
| 86 | * This structure is used to chain together the ISRs for a particular |
| 87 | * interrupt source (if it supports chaining). |
| 88 | */ |
| 89 | typedef struct irq_node { |
| 90 | irqreturn_t (*handler)(int, void *, struct pt_regs *); |
| 91 | unsigned long flags; |
| 92 | void *dev_id; |
| 93 | const char *devname; |
| 94 | struct irq_node *next; |
| 95 | } irq_node_t; |
| 96 | |
| 97 | /* |
| 98 | * This structure has only 4 elements for speed reasons |
| 99 | */ |
| 100 | typedef struct irq_handler { |
| 101 | irqreturn_t (*handler)(int, void *, struct pt_regs *); |
| 102 | unsigned long flags; |
| 103 | void *dev_id; |
| 104 | const char *devname; |
| 105 | } irq_handler_t; |
| 106 | |
| 107 | /* count of spurious interrupts */ |
| 108 | extern volatile unsigned int num_spurious; |
| 109 | |
| 110 | /* |
| 111 | * This function returns a new irq_node_t |
| 112 | */ |
| 113 | extern irq_node_t *new_irq_node(void); |
| 114 | |
| 115 | /* |
| 116 | * Some drivers want these entry points |
| 117 | */ |
| 118 | #define enable_irq(x) (mach_enable_irq ? (*mach_enable_irq)(x) : 0) |
| 119 | #define disable_irq(x) (mach_disable_irq ? (*mach_disable_irq)(x) : 0) |
| 120 | |
| 121 | #define enable_irq_nosync(x) enable_irq(x) |
| 122 | #define disable_irq_nosync(x) disable_irq(x) |
| 123 | |
| 124 | struct irqaction; |
| 125 | struct pt_regs; |
| 126 | int handle_IRQ_event(unsigned int, struct pt_regs *, struct irqaction *); |
| 127 | |
| 128 | #endif /* _M68K_IRQ_H_ */ |