1 #ifndef _ASM_X86_HW_IRQ_H 2 #define _ASM_X86_HW_IRQ_H 3 4 /* 5 * (C) 1992, 1993 Linus Torvalds, (C) 1997 Ingo Molnar 6 * 7 * moved some of the old arch/i386/kernel/irq.h to here. VY 8 * 9 * IRQ/IPI changes taken from work by Thomas Radke 10 * <tomsoft@informatik.tu-chemnitz.de> 11 * 12 * hacked by Andi Kleen for x86-64. 13 * unified by tglx 14 */ 15 16 #include <asm/irq_vectors.h> 17 18 #ifndef __ASSEMBLY__ 19 20 #include <linux/percpu.h> 21 #include <linux/profile.h> 22 #include <linux/smp.h> 23 24 #include <linux/atomic.h> 25 #include <asm/irq.h> 26 #include <asm/sections.h> 27 28 /* Interrupt handlers registered during init_IRQ */ 29 extern void apic_timer_interrupt(void); 30 extern void x86_platform_ipi(void); 31 extern void kvm_posted_intr_ipi(void); 32 extern void error_interrupt(void); 33 extern void irq_work_interrupt(void); 34 35 extern void spurious_interrupt(void); 36 extern void thermal_interrupt(void); 37 extern void reschedule_interrupt(void); 38 39 extern void invalidate_interrupt(void); 40 extern void invalidate_interrupt0(void); 41 extern void invalidate_interrupt1(void); 42 extern void invalidate_interrupt2(void); 43 extern void invalidate_interrupt3(void); 44 extern void invalidate_interrupt4(void); 45 extern void invalidate_interrupt5(void); 46 extern void invalidate_interrupt6(void); 47 extern void invalidate_interrupt7(void); 48 extern void invalidate_interrupt8(void); 49 extern void invalidate_interrupt9(void); 50 extern void invalidate_interrupt10(void); 51 extern void invalidate_interrupt11(void); 52 extern void invalidate_interrupt12(void); 53 extern void invalidate_interrupt13(void); 54 extern void invalidate_interrupt14(void); 55 extern void invalidate_interrupt15(void); 56 extern void invalidate_interrupt16(void); 57 extern void invalidate_interrupt17(void); 58 extern void invalidate_interrupt18(void); 59 extern void invalidate_interrupt19(void); 60 extern void invalidate_interrupt20(void); 61 extern void invalidate_interrupt21(void); 62 extern void invalidate_interrupt22(void); 63 extern void invalidate_interrupt23(void); 64 extern void invalidate_interrupt24(void); 65 extern void invalidate_interrupt25(void); 66 extern void invalidate_interrupt26(void); 67 extern void invalidate_interrupt27(void); 68 extern void invalidate_interrupt28(void); 69 extern void invalidate_interrupt29(void); 70 extern void invalidate_interrupt30(void); 71 extern void invalidate_interrupt31(void); 72 73 extern void irq_move_cleanup_interrupt(void); 74 extern void reboot_interrupt(void); 75 extern void threshold_interrupt(void); 76 77 extern void call_function_interrupt(void); 78 extern void call_function_single_interrupt(void); 79 80 /* IOAPIC */ 81 #define IO_APIC_IRQ(x) (((x) >= NR_IRQS_LEGACY) || ((1<<(x)) & io_apic_irqs)) 82 extern unsigned long io_apic_irqs; 83 84 extern void init_VISWS_APIC_irqs(void); 85 extern void setup_IO_APIC(void); 86 extern void disable_IO_APIC(void); 87 88 struct io_apic_irq_attr { 89 int ioapic; 90 int ioapic_pin; 91 int trigger; 92 int polarity; 93 }; 94 95 static inline void set_io_apic_irq_attr(struct io_apic_irq_attr *irq_attr, 96 int ioapic, int ioapic_pin, 97 int trigger, int polarity) 98 { 99 irq_attr->ioapic = ioapic; 100 irq_attr->ioapic_pin = ioapic_pin; 101 irq_attr->trigger = trigger; 102 irq_attr->polarity = polarity; 103 } 104 105 /* Intel specific interrupt remapping information */ 106 struct irq_2_iommu { 107 struct intel_iommu *iommu; 108 u16 irte_index; 109 u16 sub_handle; 110 u8 irte_mask; 111 }; 112 113 /* AMD specific interrupt remapping information */ 114 struct irq_2_irte { 115 u16 devid; /* Device ID for IRTE table */ 116 u16 index; /* Index into IRTE table*/ 117 }; 118 119 /* 120 * This is performance-critical, we want to do it O(1) 121 * 122 * Most irqs are mapped 1:1 with pins. 123 */ 124 struct irq_cfg { 125 struct irq_pin_list *irq_2_pin; 126 cpumask_var_t domain; 127 cpumask_var_t old_domain; 128 u8 vector; 129 u8 move_in_progress : 1; 130 #ifdef CONFIG_IRQ_REMAP 131 u8 remapped : 1; 132 union { 133 struct irq_2_iommu irq_2_iommu; 134 struct irq_2_irte irq_2_irte; 135 }; 136 #endif 137 }; 138 139 extern int assign_irq_vector(int, struct irq_cfg *, const struct cpumask *); 140 extern void send_cleanup_vector(struct irq_cfg *); 141 142 struct irq_data; 143 int __ioapic_set_affinity(struct irq_data *, const struct cpumask *, 144 unsigned int *dest_id); 145 extern int IO_APIC_get_PCI_irq_vector(int bus, int devfn, int pin, struct io_apic_irq_attr *irq_attr); 146 extern void setup_ioapic_dest(void); 147 148 extern void enable_IO_APIC(void); 149 150 /* Statistics */ 151 extern atomic_t irq_err_count; 152 extern atomic_t irq_mis_count; 153 154 /* EISA */ 155 extern void eisa_set_level_irq(unsigned int irq); 156 157 /* SMP */ 158 extern void smp_apic_timer_interrupt(struct pt_regs *); 159 extern void smp_spurious_interrupt(struct pt_regs *); 160 extern void smp_x86_platform_ipi(struct pt_regs *); 161 extern void smp_error_interrupt(struct pt_regs *); 162 #ifdef CONFIG_X86_IO_APIC 163 extern asmlinkage void smp_irq_move_cleanup_interrupt(void); 164 #endif 165 #ifdef CONFIG_SMP 166 extern void smp_reschedule_interrupt(struct pt_regs *); 167 extern void smp_call_function_interrupt(struct pt_regs *); 168 extern void smp_call_function_single_interrupt(struct pt_regs *); 169 #ifdef CONFIG_X86_32 170 extern void smp_invalidate_interrupt(struct pt_regs *); 171 #else 172 extern asmlinkage void smp_invalidate_interrupt(struct pt_regs *); 173 #endif 174 #endif 175 176 extern void (*__initconst interrupt[NR_VECTORS-FIRST_EXTERNAL_VECTOR])(void); 177 178 typedef int vector_irq_t[NR_VECTORS]; 179 DECLARE_PER_CPU(vector_irq_t, vector_irq); 180 extern void setup_vector_irq(int cpu); 181 182 #ifdef CONFIG_X86_IO_APIC 183 extern void lock_vector_lock(void); 184 extern void unlock_vector_lock(void); 185 extern void __setup_vector_irq(int cpu); 186 #else 187 static inline void lock_vector_lock(void) {} 188 static inline void unlock_vector_lock(void) {} 189 static inline void __setup_vector_irq(int cpu) {} 190 #endif 191 192 #endif /* !ASSEMBLY_ */ 193 194 #endif /* _ASM_X86_HW_IRQ_H */ 195