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>
8 #include <asm/x86_init.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
101 #define IOAPIC_MAP_ALLOC 0x1
102 #define IOAPIC_MAP_CHECK 0x2
104 #ifdef CONFIG_X86_IO_APIC
107 * # of IO-APICs and # of IRQ routing registers
109 extern int nr_ioapics
;
111 extern int mpc_ioapic_id(int ioapic
);
112 extern unsigned int mpc_ioapic_addr(int ioapic
);
113 extern struct mp_ioapic_gsi
*mp_ioapic_gsi_routing(int ioapic
);
115 #define MP_MAX_IOAPIC_PIN 127
117 /* # of MP IRQ source entries */
118 extern int mp_irq_entries
;
120 /* MP IRQ source entries */
121 extern struct mpc_intsrc mp_irqs
[MAX_IRQ_SOURCES
];
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
;
136 * If we use the IO-APIC for IRQ routing, disable automatic
137 * assignment of PCI IRQ's.
139 #define io_apic_assign_pci_irqs \
140 (mp_irq_entries && !skip_ioapic_setup && io_apic_irqs)
142 struct io_apic_irq_attr
;
144 extern void ioapic_insert_resources(void);
146 extern int native_setup_ioapic_entry(int, struct IO_APIC_route_entry
*,
148 struct io_apic_irq_attr
*);
149 extern void eoi_ioapic_irq(unsigned int irq
, struct irq_cfg
*cfg
);
151 extern void native_compose_msi_msg(struct pci_dev
*pdev
,
152 unsigned int irq
, unsigned int dest
,
153 struct msi_msg
*msg
, u8 hpet_id
);
154 extern void native_eoi_ioapic_pin(int apic
, int pin
, int vector
);
156 extern int save_ioapic_entries(void);
157 extern void mask_ioapic_entries(void);
158 extern int restore_ioapic_entries(void);
160 extern void setup_ioapic_ids_from_mpc(void);
161 extern void setup_ioapic_ids_from_mpc_nocheck(void);
163 enum ioapic_domain_type
{
164 IOAPIC_DOMAIN_INVALID
,
165 IOAPIC_DOMAIN_LEGACY
,
166 IOAPIC_DOMAIN_STRICT
,
167 IOAPIC_DOMAIN_DYNAMIC
,
172 struct irq_domain_ops
;
174 struct ioapic_domain_cfg
{
175 enum ioapic_domain_type type
;
176 const struct irq_domain_ops
*ops
;
177 struct device_node
*dev
;
180 struct mp_ioapic_gsi
{
186 extern int mp_find_ioapic(u32 gsi
);
187 extern int mp_find_ioapic_pin(int ioapic
, u32 gsi
);
188 extern u32
mp_pin_to_gsi(int ioapic
, int pin
);
189 extern int mp_map_gsi_to_irq(u32 gsi
, unsigned int flags
);
190 extern void mp_unmap_irq(int irq
);
191 extern void __init
mp_register_ioapic(int id
, u32 address
, u32 gsi_base
,
192 struct ioapic_domain_cfg
*cfg
);
193 extern int mp_irqdomain_map(struct irq_domain
*domain
, unsigned int virq
,
194 irq_hw_number_t hwirq
);
195 extern void mp_irqdomain_unmap(struct irq_domain
*domain
, unsigned int virq
);
196 extern int mp_set_gsi_attr(u32 gsi
, int trigger
, int polarity
, int node
);
197 extern void __init
pre_init_apic_IRQ0(void);
199 extern void mp_save_irq(struct mpc_intsrc
*m
);
201 extern void disable_ioapic_support(void);
203 extern void __init
native_io_apic_init_mappings(void);
204 extern unsigned int native_io_apic_read(unsigned int apic
, unsigned int reg
);
205 extern void native_io_apic_write(unsigned int apic
, unsigned int reg
, unsigned int val
);
206 extern void native_io_apic_modify(unsigned int apic
, unsigned int reg
, unsigned int val
);
207 extern void native_disable_io_apic(void);
208 extern void native_io_apic_print_entries(unsigned int apic
, unsigned int nr_entries
);
209 extern void intel_ir_io_apic_print_entries(unsigned int apic
, unsigned int nr_entries
);
210 extern int native_ioapic_set_affinity(struct irq_data
*,
211 const struct cpumask
*,
214 static inline unsigned int io_apic_read(unsigned int apic
, unsigned int reg
)
216 return x86_io_apic_ops
.read(apic
, reg
);
219 static inline void io_apic_write(unsigned int apic
, unsigned int reg
, unsigned int value
)
221 x86_io_apic_ops
.write(apic
, reg
, value
);
223 static inline void io_apic_modify(unsigned int apic
, unsigned int reg
, unsigned int value
)
225 x86_io_apic_ops
.modify(apic
, reg
, value
);
228 extern void io_apic_eoi(unsigned int apic
, unsigned int vector
);
230 extern bool mp_should_keep_irq(struct device
*dev
);
232 #else /* !CONFIG_X86_IO_APIC */
234 #define io_apic_assign_pci_irqs 0
235 #define setup_ioapic_ids_from_mpc x86_init_noop
236 static inline void ioapic_insert_resources(void) { }
237 #define gsi_top (NR_IRQS_LEGACY)
238 static inline int mp_find_ioapic(u32 gsi
) { return 0; }
239 static inline u32
mp_pin_to_gsi(int ioapic
, int pin
) { return UINT_MAX
; }
240 static inline int mp_map_gsi_to_irq(u32 gsi
, unsigned int flags
) { return gsi
; }
241 static inline void mp_unmap_irq(int irq
) { }
242 static inline bool mp_should_keep_irq(struct device
*dev
) { return 1; }
244 static inline int save_ioapic_entries(void)
249 static inline void mask_ioapic_entries(void) { }
250 static inline int restore_ioapic_entries(void)
255 static inline void mp_save_irq(struct mpc_intsrc
*m
) { };
256 static inline void disable_ioapic_support(void) { }
257 #define native_io_apic_init_mappings NULL
258 #define native_io_apic_read NULL
259 #define native_io_apic_write NULL
260 #define native_io_apic_modify NULL
261 #define native_disable_io_apic NULL
262 #define native_io_apic_print_entries NULL
263 #define native_ioapic_set_affinity NULL
264 #define native_setup_ioapic_entry NULL
265 #define native_compose_msi_msg NULL
266 #define native_eoi_ioapic_pin NULL
269 #endif /* _ASM_X86_IO_APIC_H */
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