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 enum ioapic_irq_destination_types {
77 struct IO_APIC_route_entry {
79 delivery_mode : 3, /* 000: FIXED
83 dest_mode : 1, /* 0: physical, 1: logical */
87 trigger : 1, /* 0: edge, 1: level */
88 mask : 1, /* 0: enabled, 1: disabled */
91 __u32 __reserved_3 : 24,
93 } __attribute__ ((packed));
95 struct IR_IO_APIC_route_entry {
107 } __attribute__ ((packed));
109 #ifdef CONFIG_X86_IO_APIC
112 * # of IO-APICs and # of IRQ routing registers
114 extern int nr_ioapics;
115 extern int nr_ioapic_registers[MAX_IO_APICS];
117 #define MP_MAX_IOAPIC_PIN 127
119 /* I/O APIC entries */
120 extern struct mpc_ioapic mp_ioapics[MAX_IO_APICS];
122 /* # of MP IRQ source entries */
123 extern int mp_irq_entries;
125 /* MP IRQ source entries */
126 extern struct mpc_intsrc mp_irqs[MAX_IRQ_SOURCES];
128 /* non-0 if default (table-less) MP configuration */
129 extern int mpc_default_type;
131 /* Older SiS APIC requires we rewrite the index register */
132 extern int sis_apic_bug;
134 /* 1 if "noapic" boot option passed */
135 extern int skip_ioapic_setup;
137 /* 1 if "noapic" boot option passed */
138 extern int noioapicquirk;
140 /* -1 if "noapic" boot option passed */
141 extern int noioapicreroute;
143 /* 1 if the timer IRQ uses the '8259A Virtual Wire' mode */
144 extern int timer_through_8259;
147 * If we use the IO-APIC for IRQ routing, disable automatic
148 * assignment of PCI IRQ's.
150 #define io_apic_assign_pci_irqs \
151 (mp_irq_entries && !skip_ioapic_setup && io_apic_irqs)
153 extern u8 io_apic_unique_id(u8 id);
154 extern int io_apic_get_unique_id(int ioapic, int apic_id);
155 extern int io_apic_get_version(int ioapic);
156 extern int io_apic_get_redir_entries(int ioapic);
158 struct io_apic_irq_attr;
159 extern int io_apic_set_pci_routing(struct device *dev, int irq,
160 struct io_apic_irq_attr *irq_attr);
161 void setup_IO_APIC_irq_extra(u32 gsi);
162 extern void ioapic_and_gsi_init(void);
163 extern void ioapic_insert_resources(void);
165 extern struct IO_APIC_route_entry **alloc_ioapic_entries(void);
166 extern void free_ioapic_entries(struct IO_APIC_route_entry **ioapic_entries);
167 extern int save_IO_APIC_setup(struct IO_APIC_route_entry **ioapic_entries);
168 extern void mask_IO_APIC_setup(struct IO_APIC_route_entry **ioapic_entries);
169 extern int restore_IO_APIC_setup(struct IO_APIC_route_entry **ioapic_entries);
171 extern int get_nr_irqs_gsi(void);
172 extern void setup_ioapic_ids_from_mpc(void);
173 extern void setup_ioapic_ids_from_mpc_nocheck(void);
175 struct mp_ioapic_gsi{
179 extern struct mp_ioapic_gsi mp_gsi_routing[];
181 int mp_find_ioapic(u32 gsi);
182 int mp_find_ioapic_pin(int ioapic, u32 gsi);
183 void __init mp_register_ioapic(int id, u32 address, u32 gsi_base);
184 extern void __init pre_init_apic_IRQ0(void);
186 #else /* !CONFIG_X86_IO_APIC */
188 #define io_apic_assign_pci_irqs 0
189 #define setup_ioapic_ids_from_mpc x86_init_noop
190 static const int timer_through_8259 = 0;
191 static inline void ioapic_and_gsi_init(void) { }
192 static inline void ioapic_insert_resources(void) { }
193 #define gsi_top (NR_IRQS_LEGACY)
194 static inline int mp_find_ioapic(u32 gsi) { return 0; }
196 struct io_apic_irq_attr;
197 static inline int io_apic_set_pci_routing(struct device *dev, int irq,
198 struct io_apic_irq_attr *irq_attr) { return 0; }
201 #endif /* _ASM_X86_IO_APIC_H */