1 /* SPDX-License-Identifier: GPL-2.0 */ 2 #ifndef _ALPHA_IRQ_H 3 #define _ALPHA_IRQ_H 4 5 /* 6 * linux/include/alpha/irq.h 7 * 8 * (C) 1994 Linus Torvalds 9 */ 10 11 #include <linux/linkage.h> 12 13 #if defined(CONFIG_ALPHA_GENERIC) 14 15 /* Here NR_IRQS is not exact, but rather an upper bound. This is used 16 many places throughout the kernel to size static arrays. That's ok, 17 we'll use alpha_mv.nr_irqs when we want the real thing. */ 18 19 /* When LEGACY_START_ADDRESS is selected, we leave out: 20 TITAN 21 WILDFIRE 22 MARVEL 23 24 This helps keep the kernel object size reasonable for the majority 25 of machines. 26 */ 27 28 # if defined(CONFIG_ALPHA_LEGACY_START_ADDRESS) 29 # define NR_IRQS (128) /* max is RAWHIDE/TAKARA */ 30 # else 31 # define NR_IRQS (32768 + 16) /* marvel - 32 pids */ 32 # endif 33 34 #elif defined(CONFIG_ALPHA_PC164) || \ 35 defined(CONFIG_ALPHA_LX164) 36 # define NR_IRQS 35 37 38 #elif defined(CONFIG_ALPHA_MIKASA) 39 # define NR_IRQS 32 40 41 #elif defined(CONFIG_ALPHA_ALCOR) || \ 42 defined(CONFIG_ALPHA_MIATA) || \ 43 defined(CONFIG_ALPHA_RUFFIAN) || \ 44 defined(CONFIG_ALPHA_RX164) || \ 45 defined(CONFIG_ALPHA_NORITAKE) 46 # define NR_IRQS 48 47 48 #elif defined(CONFIG_ALPHA_SABLE) || \ 49 defined(CONFIG_ALPHA_SX164) 50 # define NR_IRQS 40 51 52 #elif defined(CONFIG_ALPHA_DP264) || \ 53 defined(CONFIG_ALPHA_SHARK) 54 # define NR_IRQS 64 55 56 #elif defined(CONFIG_ALPHA_TITAN) 57 #define NR_IRQS 80 58 59 #elif defined(CONFIG_ALPHA_RAWHIDE) || \ 60 defined(CONFIG_ALPHA_TAKARA) || \ 61 defined(CONFIG_ALPHA_EIGER) 62 # define NR_IRQS 128 63 64 #elif defined(CONFIG_ALPHA_WILDFIRE) 65 # define NR_IRQS 2048 /* enuff for 8 QBBs */ 66 67 #elif defined(CONFIG_ALPHA_MARVEL) 68 # define NR_IRQS (32768 + 16) /* marvel - 32 pids*/ 69 70 #else /* everyone else */ 71 # define NR_IRQS 16 72 #endif 73 74 static __inline__ int irq_canonicalize(int irq) 75 { 76 /* 77 * XXX is this true for all Alpha's? The old serial driver 78 * did it this way for years without any complaints, so.... 79 */ 80 return ((irq == 2) ? 9 : irq); 81 } 82 83 struct pt_regs; 84 extern void (*perf_irq)(unsigned long, struct pt_regs *); 85 86 #endif /* _ALPHA_IRQ_H */ 87