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)
26 unsigned int (*read) (unsigned int apic, unsigned int reg);
27 void (*write) (unsigned int apic, unsigned int reg, unsigned int value);
28 void (*modify)(unsigned int apic, unsigned int reg, unsigned int value);
31 void __init set_io_apic_ops(const struct io_apic_ops *);
34 * The structure of the IO-APIC:
36 union IO_APIC_reg_00 {
39 u32 __reserved_2 : 14,
44 } __attribute__ ((packed)) bits;
47 union IO_APIC_reg_01 {
55 } __attribute__ ((packed)) bits;
58 union IO_APIC_reg_02 {
61 u32 __reserved_2 : 24,
64 } __attribute__ ((packed)) bits;
67 union IO_APIC_reg_03 {
72 } __attribute__ ((packed)) bits;
75 struct IO_APIC_route_entry {
77 delivery_mode : 3, /* 000: FIXED
81 dest_mode : 1, /* 0: physical, 1: logical */
85 trigger : 1, /* 0: edge, 1: level */
86 mask : 1, /* 0: enabled, 1: disabled */
89 __u32 __reserved_3 : 24,
91 } __attribute__ ((packed));
93 struct IR_IO_APIC_route_entry {
105 } __attribute__ ((packed));
107 #define IOAPIC_AUTO -1
108 #define IOAPIC_EDGE 0
109 #define IOAPIC_LEVEL 1
111 #ifdef CONFIG_X86_IO_APIC
114 * # of IO-APICs and # of IRQ routing registers
116 extern int nr_ioapics;
118 extern int mpc_ioapic_id(int ioapic);
119 extern unsigned int mpc_ioapic_addr(int ioapic);
120 extern struct mp_ioapic_gsi *mp_ioapic_gsi_routing(int ioapic);
122 #define MP_MAX_IOAPIC_PIN 127
124 /* # of MP IRQ source entries */
125 extern int mp_irq_entries;
127 /* MP IRQ source entries */
128 extern struct mpc_intsrc mp_irqs[MAX_IRQ_SOURCES];
130 /* non-0 if default (table-less) MP configuration */
131 extern int mpc_default_type;
133 /* Older SiS APIC requires we rewrite the index register */
134 extern int sis_apic_bug;
136 /* 1 if "noapic" boot option passed */
137 extern int skip_ioapic_setup;
139 /* 1 if "noapic" boot option passed */
140 extern int noioapicquirk;
142 /* -1 if "noapic" boot option passed */
143 extern int noioapicreroute;
145 /* 1 if the timer IRQ uses the '8259A Virtual Wire' mode */
146 extern int timer_through_8259;
149 * If we use the IO-APIC for IRQ routing, disable automatic
150 * assignment of PCI IRQ's.
152 #define io_apic_assign_pci_irqs \
153 (mp_irq_entries && !skip_ioapic_setup && io_apic_irqs)
155 struct io_apic_irq_attr;
156 extern int io_apic_set_pci_routing(struct device *dev, int irq,
157 struct io_apic_irq_attr *irq_attr);
158 void setup_IO_APIC_irq_extra(u32 gsi);
159 extern void ioapic_and_gsi_init(void);
160 extern void ioapic_insert_resources(void);
162 int io_apic_setup_irq_pin_once(unsigned int irq, int node, struct io_apic_irq_attr *attr);
164 extern int save_ioapic_entries(void);
165 extern void mask_ioapic_entries(void);
166 extern int restore_ioapic_entries(void);
168 extern int get_nr_irqs_gsi(void);
170 extern void setup_ioapic_ids_from_mpc(void);
171 extern void setup_ioapic_ids_from_mpc_nocheck(void);
173 struct mp_ioapic_gsi{
177 extern struct mp_ioapic_gsi mp_gsi_routing[];
179 int mp_find_ioapic(u32 gsi);
180 int mp_find_ioapic_pin(int ioapic, u32 gsi);
181 void __init mp_register_ioapic(int id, u32 address, u32 gsi_base);
182 extern void __init pre_init_apic_IRQ0(void);
184 extern void mp_save_irq(struct mpc_intsrc *m);
186 extern void disable_ioapic_support(void);
188 #else /* !CONFIG_X86_IO_APIC */
190 #define io_apic_assign_pci_irqs 0
191 #define setup_ioapic_ids_from_mpc x86_init_noop
192 static const int timer_through_8259 = 0;
193 static inline void ioapic_and_gsi_init(void) { }
194 static inline void ioapic_insert_resources(void) { }
195 #define gsi_top (NR_IRQS_LEGACY)
196 static inline int mp_find_ioapic(u32 gsi) { return 0; }
198 struct io_apic_irq_attr;
199 static inline int io_apic_set_pci_routing(struct device *dev, int irq,
200 struct io_apic_irq_attr *irq_attr) { return 0; }
202 static inline int save_ioapic_entries(void)
207 static inline void mask_ioapic_entries(void) { }
208 static inline int restore_ioapic_entries(void)
213 static inline void mp_save_irq(struct mpc_intsrc *m) { };
214 static inline void disable_ioapic_support(void) { }
217 #endif /* _ASM_X86_IO_APIC_H */