Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1 | #ifndef _ASM_IA64_HW_IRQ_H |
| 2 | #define _ASM_IA64_HW_IRQ_H |
| 3 | |
| 4 | /* |
| 5 | * Copyright (C) 2001-2003 Hewlett-Packard Co |
| 6 | * David Mosberger-Tang <davidm@hpl.hp.com> |
| 7 | */ |
| 8 | |
| 9 | #include <linux/interrupt.h> |
| 10 | #include <linux/sched.h> |
| 11 | #include <linux/types.h> |
| 12 | #include <linux/profile.h> |
| 13 | |
| 14 | #include <asm/machvec.h> |
| 15 | #include <asm/ptrace.h> |
| 16 | #include <asm/smp.h> |
| 17 | |
Isaku Yamahata | 85cbc50 | 2008-05-19 22:13:43 +0900 | [diff] [blame] | 18 | #ifndef CONFIG_PARAVIRT |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 19 | typedef u8 ia64_vector; |
Isaku Yamahata | 85cbc50 | 2008-05-19 22:13:43 +0900 | [diff] [blame] | 20 | #else |
| 21 | typedef u16 ia64_vector; |
| 22 | #endif |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 23 | |
| 24 | /* |
| 25 | * 0 special |
| 26 | * |
| 27 | * 1,3-14 are reserved from firmware |
| 28 | * |
| 29 | * 16-255 (vectored external interrupts) are available |
| 30 | * |
| 31 | * 15 spurious interrupt (see IVR) |
| 32 | * |
| 33 | * 16 lowest priority, 255 highest priority |
| 34 | * |
| 35 | * 15 classes of 16 interrupts each. |
| 36 | */ |
| 37 | #define IA64_MIN_VECTORED_IRQ 16 |
| 38 | #define IA64_MAX_VECTORED_IRQ 255 |
| 39 | #define IA64_NUM_VECTORS 256 |
| 40 | |
| 41 | #define AUTO_ASSIGN -1 |
| 42 | |
| 43 | #define IA64_SPURIOUS_INT_VECTOR 0x0f |
| 44 | |
| 45 | /* |
| 46 | * Vectors 0x10-0x1f are used for low priority interrupts, e.g. CMCI. |
| 47 | */ |
| 48 | #define IA64_CPEP_VECTOR 0x1c /* corrected platform error polling vector */ |
| 49 | #define IA64_CMCP_VECTOR 0x1d /* corrected machine-check polling vector */ |
| 50 | #define IA64_CPE_VECTOR 0x1e /* corrected platform error interrupt vector */ |
| 51 | #define IA64_CMC_VECTOR 0x1f /* corrected machine-check interrupt vector */ |
| 52 | /* |
| 53 | * Vectors 0x20-0x2f are reserved for legacy ISA IRQs. |
Mark Maule | 1008307 | 2006-04-14 16:03:49 -0500 | [diff] [blame] | 54 | * Use vectors 0x30-0xe7 as the default device vector range for ia64. |
| 55 | * Platforms may choose to reduce this range in platform_irq_setup, but the |
| 56 | * platform range must fall within |
| 57 | * [IA64_DEF_FIRST_DEVICE_VECTOR..IA64_DEF_LAST_DEVICE_VECTOR] |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 58 | */ |
Mark Maule | 1008307 | 2006-04-14 16:03:49 -0500 | [diff] [blame] | 59 | extern int ia64_first_device_vector; |
| 60 | extern int ia64_last_device_vector; |
| 61 | |
| 62 | #define IA64_DEF_FIRST_DEVICE_VECTOR 0x30 |
| 63 | #define IA64_DEF_LAST_DEVICE_VECTOR 0xe7 |
| 64 | #define IA64_FIRST_DEVICE_VECTOR ia64_first_device_vector |
| 65 | #define IA64_LAST_DEVICE_VECTOR ia64_last_device_vector |
| 66 | #define IA64_MAX_DEVICE_VECTORS (IA64_DEF_LAST_DEVICE_VECTOR - IA64_DEF_FIRST_DEVICE_VECTOR + 1) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 67 | #define IA64_NUM_DEVICE_VECTORS (IA64_LAST_DEVICE_VECTOR - IA64_FIRST_DEVICE_VECTOR + 1) |
| 68 | |
| 69 | #define IA64_MCA_RENDEZ_VECTOR 0xe8 /* MCA rendez interrupt */ |
Joe Perches | 313d8e5 | 2007-12-18 17:02:21 -0800 | [diff] [blame] | 70 | #define IA64_PERFMON_VECTOR 0xee /* performance monitor interrupt vector */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 71 | #define IA64_TIMER_VECTOR 0xef /* use highest-prio group 15 interrupt for timer */ |
| 72 | #define IA64_MCA_WAKEUP_VECTOR 0xf0 /* MCA wakeup (must be >MCA_RENDEZ_VECTOR) */ |
Jack Steiner | 3be44b9 | 2007-05-08 14:50:43 -0700 | [diff] [blame] | 73 | #define IA64_IPI_LOCAL_TLB_FLUSH 0xfc /* SMP flush local TLB */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 74 | #define IA64_IPI_RESCHEDULE 0xfd /* SMP reschedule */ |
| 75 | #define IA64_IPI_VECTOR 0xfe /* inter-processor interrupt vector */ |
| 76 | |
| 77 | /* Used for encoding redirected irqs */ |
| 78 | |
| 79 | #define IA64_IRQ_REDIRECTED (1 << 31) |
| 80 | |
| 81 | /* IA64 inter-cpu interrupt related definitions */ |
| 82 | |
| 83 | #define IA64_IPI_DEFAULT_BASE_ADDR 0xfee00000 |
| 84 | |
| 85 | /* Delivery modes for inter-cpu interrupts */ |
| 86 | enum { |
| 87 | IA64_IPI_DM_INT = 0x0, /* pend an external interrupt */ |
| 88 | IA64_IPI_DM_PMI = 0x2, /* pend a PMI */ |
| 89 | IA64_IPI_DM_NMI = 0x4, /* pend an NMI (vector 2) */ |
| 90 | IA64_IPI_DM_INIT = 0x5, /* pend an INIT interrupt */ |
| 91 | IA64_IPI_DM_EXTINT = 0x7, /* pend an 8259-compatible interrupt. */ |
| 92 | }; |
| 93 | |
| 94 | extern __u8 isa_irq_to_vector_map[16]; |
| 95 | #define isa_irq_to_vector(x) isa_irq_to_vector_map[(x)] |
| 96 | |
Yasuaki Ishimatsu | e1b30a3 | 2007-07-17 21:22:23 +0900 | [diff] [blame] | 97 | struct irq_cfg { |
| 98 | ia64_vector vector; |
Yasuaki Ishimatsu | 4994be1 | 2007-07-17 21:22:33 +0900 | [diff] [blame] | 99 | cpumask_t domain; |
Kenji Kaneshige | a6cd6322 | 2008-02-25 14:32:22 +0900 | [diff] [blame] | 100 | cpumask_t old_domain; |
| 101 | unsigned move_cleanup_count; |
| 102 | u8 move_in_progress : 1; |
Yasuaki Ishimatsu | e1b30a3 | 2007-07-17 21:22:23 +0900 | [diff] [blame] | 103 | }; |
| 104 | extern spinlock_t vector_lock; |
| 105 | extern struct irq_cfg irq_cfg[NR_IRQS]; |
Yasuaki Ishimatsu | 4994be1 | 2007-07-17 21:22:33 +0900 | [diff] [blame] | 106 | #define irq_to_domain(x) irq_cfg[(x)].domain |
Yasuaki Ishimatsu | e1b30a3 | 2007-07-17 21:22:23 +0900 | [diff] [blame] | 107 | DECLARE_PER_CPU(int[IA64_NUM_VECTORS], vector_irq); |
| 108 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 109 | extern struct hw_interrupt_type irq_type_ia64_lsapic; /* CPU-internal interrupt controller */ |
| 110 | |
Isaku Yamahata | 85cbc50 | 2008-05-19 22:13:43 +0900 | [diff] [blame] | 111 | #ifdef CONFIG_PARAVIRT_GUEST |
| 112 | #include <asm/paravirt.h> |
| 113 | #else |
| 114 | #define ia64_register_ipi ia64_native_register_ipi |
| 115 | #define assign_irq_vector ia64_native_assign_irq_vector |
| 116 | #define free_irq_vector ia64_native_free_irq_vector |
| 117 | #define register_percpu_irq ia64_native_register_percpu_irq |
| 118 | #define ia64_resend_irq ia64_native_resend_irq |
| 119 | #endif |
| 120 | |
| 121 | extern void ia64_native_register_ipi(void); |
Yasuaki Ishimatsu | 4994be1 | 2007-07-17 21:22:33 +0900 | [diff] [blame] | 122 | extern int bind_irq_vector(int irq, int vector, cpumask_t domain); |
Isaku Yamahata | 85cbc50 | 2008-05-19 22:13:43 +0900 | [diff] [blame] | 123 | extern int ia64_native_assign_irq_vector (int irq); /* allocate a free vector */ |
| 124 | extern void ia64_native_free_irq_vector (int vector); |
Mark Maule | 1008307 | 2006-04-14 16:03:49 -0500 | [diff] [blame] | 125 | extern int reserve_irq_vector (int vector); |
Yasuaki Ishimatsu | e1b30a3 | 2007-07-17 21:22:23 +0900 | [diff] [blame] | 126 | extern void __setup_vector_irq(int cpu); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 127 | extern void ia64_send_ipi (int cpu, int vector, int delivery_mode, int redirect); |
Isaku Yamahata | 85cbc50 | 2008-05-19 22:13:43 +0900 | [diff] [blame] | 128 | extern void ia64_native_register_percpu_irq (ia64_vector vec, struct irqaction *action); |
Yasuaki Ishimatsu | e1b30a3 | 2007-07-17 21:22:23 +0900 | [diff] [blame] | 129 | extern int check_irq_used (int irq); |
| 130 | extern void destroy_and_reserve_irq (unsigned int irq); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 131 | |
Kenji Kaneshige | a6cd6322 | 2008-02-25 14:32:22 +0900 | [diff] [blame] | 132 | #if defined(CONFIG_SMP) && (defined(CONFIG_IA64_GENERIC) || defined(CONFIG_IA64_DIG)) |
| 133 | extern int irq_prepare_move(int irq, int cpu); |
| 134 | extern void irq_complete_move(unsigned int irq); |
| 135 | #else |
| 136 | static inline int irq_prepare_move(int irq, int cpu) { return 0; } |
| 137 | static inline void irq_complete_move(unsigned int irq) {} |
| 138 | #endif |
| 139 | |
Isaku Yamahata | 85cbc50 | 2008-05-19 22:13:43 +0900 | [diff] [blame] | 140 | static inline void ia64_native_resend_irq(unsigned int vector) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 141 | { |
| 142 | platform_send_ipi(smp_processor_id(), vector, IA64_IPI_DM_INT, 0); |
| 143 | } |
| 144 | |
| 145 | /* |
| 146 | * Default implementations for the irq-descriptor API: |
| 147 | */ |
| 148 | |
Thomas Gleixner | 86bc3df | 2009-06-10 12:45:00 -0700 | [diff] [blame^] | 149 | extern struct irq_desc irq_desc[NR_IRQS]; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 150 | |
| 151 | #ifndef CONFIG_IA64_GENERIC |
Kenji Kaneshige | 1115200 | 2007-08-13 10:31:26 -0700 | [diff] [blame] | 152 | static inline ia64_vector __ia64_irq_to_vector(int irq) |
| 153 | { |
| 154 | return irq_cfg[irq].vector; |
| 155 | } |
| 156 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 157 | static inline unsigned int |
| 158 | __ia64_local_vector_to_irq (ia64_vector vec) |
| 159 | { |
Yasuaki Ishimatsu | e1b30a3 | 2007-07-17 21:22:23 +0900 | [diff] [blame] | 160 | return __get_cpu_var(vector_irq)[vec]; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 161 | } |
| 162 | #endif |
| 163 | |
| 164 | /* |
| 165 | * Next follows the irq descriptor interface. On IA-64, each CPU supports 256 interrupt |
| 166 | * vectors. On smaller systems, there is a one-to-one correspondence between interrupt |
| 167 | * vectors and the Linux irq numbers. However, larger systems may have multiple interrupt |
| 168 | * domains meaning that the translation from vector number to irq number depends on the |
| 169 | * interrupt domain that a CPU belongs to. This API abstracts such platform-dependent |
| 170 | * differences and provides a uniform means to translate between vector and irq numbers |
| 171 | * and to obtain the irq descriptor for a given irq number. |
| 172 | */ |
| 173 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 174 | /* Extract the IA-64 vector that corresponds to IRQ. */ |
| 175 | static inline ia64_vector |
| 176 | irq_to_vector (int irq) |
| 177 | { |
Kenji Kaneshige | 1115200 | 2007-08-13 10:31:26 -0700 | [diff] [blame] | 178 | return platform_irq_to_vector(irq); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 179 | } |
| 180 | |
| 181 | /* |
| 182 | * Convert the local IA-64 vector to the corresponding irq number. This translation is |
| 183 | * done in the context of the interrupt domain that the currently executing CPU belongs |
| 184 | * to. |
| 185 | */ |
| 186 | static inline unsigned int |
| 187 | local_vector_to_irq (ia64_vector vec) |
| 188 | { |
| 189 | return platform_local_vector_to_irq(vec); |
| 190 | } |
| 191 | |
| 192 | #endif /* _ASM_IA64_HW_IRQ_H */ |