#ifndef _M68K_IRQ_H_ #define _M68K_IRQ_H_ #include <linux/linkage.h> #include <linux/hardirq.h> #include <linux/spinlock_types.h> /* * This should be the same as the max(NUM_X_SOURCES) for all the * different m68k hosts compiled into the kernel. * Currently the Atari has 72 and the Amiga 24, but if both are * supported in the kernel it is better to make room for 72. */ #if defined(CONFIG_VME) || defined(CONFIG_SUN3) || defined(CONFIG_SUN3X) #define NR_IRQS 200 #elif defined(CONFIG_ATARI) || defined(CONFIG_MAC) #define NR_IRQS 72 #elif defined(CONFIG_Q40) #define NR_IRQS 43 #elif defined(CONFIG_AMIGA) #define NR_IRQS 32 #elif defined(CONFIG_APOLLO) #define NR_IRQS 24 #elif defined(CONFIG_HP300) #define NR_IRQS 8 #else #error unknown nr of irqs #endif /* * The hardirq mask has to be large enough to have * space for potentially all IRQ sources in the system * nesting on a single CPU: */ #if (1 << HARDIRQ_BITS) < NR_IRQS # error HARDIRQ_BITS is too low! #endif /* * Interrupt source definitions * General interrupt sources are the level 1-7. * Adding an interrupt service routine for one of these sources * results in the addition of that routine to a chain of routines. * Each one is called in succession. Each individual interrupt * service routine should determine if the device associated with * that routine requires service. */ #define IRQ_SPURIOUS 0 #define IRQ_AUTO_1 1 /* level 1 interrupt */ #define IRQ_AUTO_2 2 /* level 2 interrupt */ #define IRQ_AUTO_3 3 /* level 3 interrupt */ #define IRQ_AUTO_4 4 /* level 4 interrupt */ #define IRQ_AUTO_5 5 /* level 5 interrupt */ #define IRQ_AUTO_6 6 /* level 6 interrupt */ #define IRQ_AUTO_7 7 /* level 7 interrupt (non-maskable) */ #define IRQ_USER 8 extern unsigned int irq_canonicalize(unsigned int irq); struct pt_regs; /* * various flags for request_irq() - the Amiga now uses the standard * mechanism like all other architectures - IRQF_DISABLED and * IRQF_SHARED are your friends. */ #ifndef MACH_AMIGA_ONLY #define IRQ_FLG_LOCK (0x0001) /* handler is not replaceable */ #define IRQ_FLG_REPLACE (0x0002) /* replace existing handler */ #define IRQ_FLG_FAST (0x0004) #define IRQ_FLG_SLOW (0x0008) #define IRQ_FLG_STD (0x8000) /* internally used */ #endif /* * This structure is used to chain together the ISRs for a particular * interrupt source (if it supports chaining). */ typedef struct irq_node { int (*handler)(int, void *); void *dev_id; struct irq_node *next; unsigned long flags; const char *devname; } irq_node_t; /* * This structure has only 4 elements for speed reasons */ struct irq_handler { int (*handler)(int, void *); unsigned long flags; void *dev_id; const char *devname; }; struct irq_controller { const char *name; spinlock_t lock; int (*startup)(unsigned int irq); void (*shutdown)(unsigned int irq); void (*enable)(unsigned int irq); void (*disable)(unsigned int irq); }; extern int m68k_irq_startup(unsigned int); extern void m68k_irq_shutdown(unsigned int); /* * This function returns a new irq_node_t */ extern irq_node_t *new_irq_node(void); extern void m68k_setup_auto_interrupt(void (*handler)(unsigned int, struct pt_regs *)); extern void m68k_setup_user_interrupt(unsigned int vec, unsigned int cnt, void (*handler)(unsigned int, struct pt_regs *)); extern void m68k_setup_irq_controller(struct irq_controller *, unsigned int, unsigned int); asmlinkage void m68k_handle_int(unsigned int); asmlinkage void __m68k_handle_int(unsigned int, struct pt_regs *); #endif /* _M68K_IRQ_H_ */