1 #ifndef _M68K_IRQ_H_ 2 #define _M68K_IRQ_H_ 3 4 /* 5 * This should be the same as the max(NUM_X_SOURCES) for all the 6 * different m68k hosts compiled into the kernel. 7 * Currently the Atari has 72 and the Amiga 24, but if both are 8 * supported in the kernel it is better to make room for 72. 9 */ 10 #if defined(CONFIG_COLDFIRE) 11 #define NR_IRQS 256 12 #elif defined(CONFIG_VME) || defined(CONFIG_SUN3) || defined(CONFIG_SUN3X) 13 #define NR_IRQS 200 14 #elif defined(CONFIG_ATARI) || defined(CONFIG_MAC) 15 #define NR_IRQS 72 16 #elif defined(CONFIG_Q40) 17 #define NR_IRQS 43 18 #elif defined(CONFIG_AMIGA) || !defined(CONFIG_MMU) 19 #define NR_IRQS 32 20 #elif defined(CONFIG_APOLLO) 21 #define NR_IRQS 24 22 #elif defined(CONFIG_HP300) 23 #define NR_IRQS 8 24 #else 25 #define NR_IRQS 0 26 #endif 27 28 #ifdef CONFIG_MMU 29 30 #include <linux/linkage.h> 31 #include <linux/hardirq.h> 32 #include <linux/irqreturn.h> 33 #include <linux/spinlock_types.h> 34 35 /* 36 * The hardirq mask has to be large enough to have 37 * space for potentially all IRQ sources in the system 38 * nesting on a single CPU: 39 */ 40 #if (1 << HARDIRQ_BITS) < NR_IRQS 41 # error HARDIRQ_BITS is too low! 42 #endif 43 44 /* 45 * Interrupt source definitions 46 * General interrupt sources are the level 1-7. 47 * Adding an interrupt service routine for one of these sources 48 * results in the addition of that routine to a chain of routines. 49 * Each one is called in succession. Each individual interrupt 50 * service routine should determine if the device associated with 51 * that routine requires service. 52 */ 53 54 #define IRQ_SPURIOUS 0 55 56 #define IRQ_AUTO_1 1 /* level 1 interrupt */ 57 #define IRQ_AUTO_2 2 /* level 2 interrupt */ 58 #define IRQ_AUTO_3 3 /* level 3 interrupt */ 59 #define IRQ_AUTO_4 4 /* level 4 interrupt */ 60 #define IRQ_AUTO_5 5 /* level 5 interrupt */ 61 #define IRQ_AUTO_6 6 /* level 6 interrupt */ 62 #define IRQ_AUTO_7 7 /* level 7 interrupt (non-maskable) */ 63 64 #define IRQ_USER 8 65 66 extern unsigned int irq_canonicalize(unsigned int irq); 67 68 struct pt_regs; 69 70 /* 71 * various flags for request_irq() - the Amiga now uses the standard 72 * mechanism like all other architectures - IRQF_DISABLED and 73 * IRQF_SHARED are your friends. 74 */ 75 #ifndef MACH_AMIGA_ONLY 76 #define IRQ_FLG_LOCK (0x0001) /* handler is not replaceable */ 77 #define IRQ_FLG_REPLACE (0x0002) /* replace existing handler */ 78 #define IRQ_FLG_FAST (0x0004) 79 #define IRQ_FLG_SLOW (0x0008) 80 #define IRQ_FLG_STD (0x8000) /* internally used */ 81 #endif 82 83 /* 84 * This structure is used to chain together the ISRs for a particular 85 * interrupt source (if it supports chaining). 86 */ 87 typedef struct irq_node { 88 irqreturn_t (*handler)(int, void *); 89 void *dev_id; 90 struct irq_node *next; 91 unsigned long flags; 92 const char *devname; 93 } irq_node_t; 94 95 /* 96 * This structure has only 4 elements for speed reasons 97 */ 98 struct irq_handler { 99 int (*handler)(int, void *); 100 unsigned long flags; 101 void *dev_id; 102 const char *devname; 103 }; 104 105 struct irq_controller { 106 const char *name; 107 spinlock_t lock; 108 int (*startup)(unsigned int irq); 109 void (*shutdown)(unsigned int irq); 110 void (*enable)(unsigned int irq); 111 void (*disable)(unsigned int irq); 112 }; 113 114 extern int m68k_irq_startup(unsigned int); 115 extern void m68k_irq_shutdown(unsigned int); 116 117 /* 118 * This function returns a new irq_node_t 119 */ 120 extern irq_node_t *new_irq_node(void); 121 122 extern void m68k_setup_auto_interrupt(void (*handler)(unsigned int, struct pt_regs *)); 123 extern void m68k_setup_user_interrupt(unsigned int vec, unsigned int cnt, 124 void (*handler)(unsigned int, struct pt_regs *)); 125 extern void m68k_setup_irq_controller(struct irq_controller *, unsigned int, unsigned int); 126 127 asmlinkage void m68k_handle_int(unsigned int); 128 asmlinkage void __m68k_handle_int(unsigned int, struct pt_regs *); 129 130 #else 131 #define irq_canonicalize(irq) (irq) 132 #endif /* CONFIG_MMU */ 133 134 #endif /* _M68K_IRQ_H_ */ 135