1 #ifndef _ASM_X86_IO_APIC_H
2 #define _ASM_X86_IO_APIC_H
4 #include <linux/types.h>
5 #include <asm/mpspec.h>
6 #include <asm/apicdef.h>
7 #include <asm/irq_vectors.h>
10 * Intel IO-APIC support for SMP and UP systems.
12 * Copyright (C) 1997, 1998, 1999, 2000 Ingo Molnar
15 /* I/O Unit Redirection Table */
16 #define IO_APIC_REDIR_VECTOR_MASK 0x000FF
17 #define IO_APIC_REDIR_DEST_LOGICAL 0x00800
18 #define IO_APIC_REDIR_DEST_PHYSICAL 0x00000
19 #define IO_APIC_REDIR_SEND_PENDING (1 << 12)
20 #define IO_APIC_REDIR_REMOTE_IRR (1 << 14)
21 #define IO_APIC_REDIR_LEVEL_TRIGGER (1 << 15)
22 #define IO_APIC_REDIR_MASKED (1 << 16)
25 * The structure of the IO-APIC:
27 union IO_APIC_reg_00 {
30 u32 __reserved_2 : 14,
35 } __attribute__ ((packed)) bits;
38 union IO_APIC_reg_01 {
46 } __attribute__ ((packed)) bits;
49 union IO_APIC_reg_02 {
52 u32 __reserved_2 : 24,
55 } __attribute__ ((packed)) bits;
58 union IO_APIC_reg_03 {
63 } __attribute__ ((packed)) bits;
66 struct IO_APIC_route_entry {
68 delivery_mode : 3, /* 000: FIXED
72 dest_mode : 1, /* 0: physical, 1: logical */
76 trigger : 1, /* 0: edge, 1: level */
77 mask : 1, /* 0: enabled, 1: disabled */
80 __u32 __reserved_3 : 24,
82 } __attribute__ ((packed));
84 struct IR_IO_APIC_route_entry {
96 } __attribute__ ((packed));
98 #define IOAPIC_AUTO -1
100 #define IOAPIC_LEVEL 1
102 #ifdef CONFIG_X86_IO_APIC
105 * # of IO-APICs and # of IRQ routing registers
107 extern int nr_ioapics;
109 extern int mpc_ioapic_id(int ioapic);
110 extern unsigned int mpc_ioapic_addr(int ioapic);
112 #define MP_MAX_IOAPIC_PIN 127
114 /* # of MP IRQ source entries */
115 extern int mp_irq_entries;
117 /* MP IRQ source entries */
118 extern struct mpc_intsrc mp_irqs[MAX_IRQ_SOURCES];
120 /* non-0 if default (table-less) MP configuration */
121 extern int mpc_default_type;
123 /* Older SiS APIC requires we rewrite the index register */
124 extern int sis_apic_bug;
126 /* 1 if "noapic" boot option passed */
127 extern int skip_ioapic_setup;
129 /* 1 if "noapic" boot option passed */
130 extern int noioapicquirk;
132 /* -1 if "noapic" boot option passed */
133 extern int noioapicreroute;
135 /* 1 if the timer IRQ uses the '8259A Virtual Wire' mode */
136 extern int timer_through_8259;
139 * If we use the IO-APIC for IRQ routing, disable automatic
140 * assignment of PCI IRQ's.
142 #define io_apic_assign_pci_irqs \
143 (mp_irq_entries && !skip_ioapic_setup && io_apic_irqs)
145 struct io_apic_irq_attr;
146 extern int io_apic_set_pci_routing(struct device *dev, int irq,
147 struct io_apic_irq_attr *irq_attr);
148 void setup_IO_APIC_irq_extra(u32 gsi);
149 extern void ioapic_and_gsi_init(void);
150 extern void ioapic_insert_resources(void);
152 int io_apic_setup_irq_pin_once(unsigned int irq, int node, struct io_apic_irq_attr *attr);
154 extern int save_ioapic_entries(void);
155 extern void mask_ioapic_entries(void);
156 extern int restore_ioapic_entries(void);
158 extern int get_nr_irqs_gsi(void);
160 extern void setup_ioapic_ids_from_mpc(void);
161 extern void setup_ioapic_ids_from_mpc_nocheck(void);
163 struct mp_ioapic_gsi{
167 extern struct mp_ioapic_gsi mp_gsi_routing[];
169 int mp_find_ioapic(u32 gsi);
170 int mp_find_ioapic_pin(int ioapic, u32 gsi);
171 void __init mp_register_ioapic(int id, u32 address, u32 gsi_base);
172 extern void __init pre_init_apic_IRQ0(void);
174 extern void mp_save_irq(struct mpc_intsrc *m);
176 extern void disable_ioapic_support(void);
178 #else /* !CONFIG_X86_IO_APIC */
180 #define io_apic_assign_pci_irqs 0
181 #define setup_ioapic_ids_from_mpc x86_init_noop
182 static const int timer_through_8259 = 0;
183 static inline void ioapic_and_gsi_init(void) { }
184 static inline void ioapic_insert_resources(void) { }
185 #define gsi_top (NR_IRQS_LEGACY)
186 static inline int mp_find_ioapic(u32 gsi) { return 0; }
188 struct io_apic_irq_attr;
189 static inline int io_apic_set_pci_routing(struct device *dev, int irq,
190 struct io_apic_irq_attr *irq_attr) { return 0; }
192 static inline int save_ioapic_entries(void)
197 static inline void mask_ioapic_entries(void) { }
198 static inline int restore_ioapic_entries(void)
203 static inline void mp_save_irq(struct mpc_intsrc *m) { };
204 static inline void disable_ioapic_support(void) { }
207 #endif /* _ASM_X86_IO_APIC_H */