1#ifndef _M68K_IRQ_H_ 2#define _M68K_IRQ_H_ 3 4#include <linux/linkage.h> 5#include <linux/hardirq.h> 6#include <linux/spinlock_types.h> 7 8/* 9 * This should be the same as the max(NUM_X_SOURCES) for all the 10 * different m68k hosts compiled into the kernel. 11 * Currently the Atari has 72 and the Amiga 24, but if both are 12 * supported in the kernel it is better to make room for 72. 13 */ 14#if defined(CONFIG_VME) || defined(CONFIG_SUN3) || defined(CONFIG_SUN3X) 15#define NR_IRQS 200 16#elif defined(CONFIG_ATARI) || defined(CONFIG_MAC) 17#define NR_IRQS 72 18#elif defined(CONFIG_Q40) 19#define NR_IRQS 43 20#elif defined(CONFIG_AMIGA) 21#define NR_IRQS 32 22#elif defined(CONFIG_APOLLO) 23#define NR_IRQS 24 24#elif defined(CONFIG_HP300) 25#define NR_IRQS 8 26#else 27#error unknown nr of irqs 28#endif 29 30/* 31 * The hardirq mask has to be large enough to have 32 * space for potentially all IRQ sources in the system 33 * nesting on a single CPU: 34 */ 35#if (1 << HARDIRQ_BITS) < NR_IRQS 36# error HARDIRQ_BITS is too low! 37#endif 38 39/* 40 * Interrupt source definitions 41 * General interrupt sources are the level 1-7. 42 * Adding an interrupt service routine for one of these sources 43 * results in the addition of that routine to a chain of routines. 44 * Each one is called in succession. Each individual interrupt 45 * service routine should determine if the device associated with 46 * that routine requires service. 47 */ 48 49#define IRQ_SPURIOUS 0 50 51#define IRQ_AUTO_1 1 /* level 1 interrupt */ 52#define IRQ_AUTO_2 2 /* level 2 interrupt */ 53#define IRQ_AUTO_3 3 /* level 3 interrupt */ 54#define IRQ_AUTO_4 4 /* level 4 interrupt */ 55#define IRQ_AUTO_5 5 /* level 5 interrupt */ 56#define IRQ_AUTO_6 6 /* level 6 interrupt */ 57#define IRQ_AUTO_7 7 /* level 7 interrupt (non-maskable) */ 58 59#define IRQ_USER 8 60 61extern unsigned int irq_canonicalize(unsigned int irq); 62extern void enable_irq(unsigned int); 63extern void disable_irq(unsigned int); 64#define disable_irq_nosync disable_irq 65 66struct pt_regs; 67 68/* 69 * various flags for request_irq() - the Amiga now uses the standard 70 * mechanism like all other architectures - IRQF_DISABLED and 71 * IRQF_SHARED are your friends. 72 */ 73#ifndef MACH_AMIGA_ONLY 74#define IRQ_FLG_LOCK (0x0001) /* handler is not replaceable */ 75#define IRQ_FLG_REPLACE (0x0002) /* replace existing handler */ 76#define IRQ_FLG_FAST (0x0004) 77#define IRQ_FLG_SLOW (0x0008) 78#define IRQ_FLG_STD (0x8000) /* internally used */ 79#endif 80 81/* 82 * This structure is used to chain together the ISRs for a particular 83 * interrupt source (if it supports chaining). 84 */ 85typedef struct irq_node { 86 int (*handler)(int, void *); 87 void *dev_id; 88 struct irq_node *next; 89 unsigned long flags; 90 const char *devname; 91} irq_node_t; 92 93/* 94 * This structure has only 4 elements for speed reasons 95 */ 96struct irq_handler { 97 int (*handler)(int, void *); 98 unsigned long flags; 99 void *dev_id; 100 const char *devname; 101}; 102 103struct irq_controller { 104 const char *name; 105 spinlock_t lock; 106 int (*startup)(unsigned int irq); 107 void (*shutdown)(unsigned int irq); 108 void (*enable)(unsigned int irq); 109 void (*disable)(unsigned int irq); 110}; 111 112extern int m68k_irq_startup(unsigned int); 113extern void m68k_irq_shutdown(unsigned int); 114 115/* 116 * This function returns a new irq_node_t 117 */ 118extern irq_node_t *new_irq_node(void); 119 120extern void m68k_setup_auto_interrupt(void (*handler)(unsigned int, struct pt_regs *)); 121extern void m68k_setup_user_interrupt(unsigned int vec, unsigned int cnt, 122 void (*handler)(unsigned int, struct pt_regs *)); 123extern void m68k_setup_irq_controller(struct irq_controller *, unsigned int, unsigned int); 124 125asmlinkage void m68k_handle_int(unsigned int); 126asmlinkage void __m68k_handle_int(unsigned int, struct pt_regs *); 127 128#endif /* _M68K_IRQ_H_ */ 129