#ifndef _ASM_X86_IO_APIC_H
#define _ASM_X86_IO_APIC_H
#include <linux/types.h>
#include <asm/mpspec.h>
#include <asm/apicdef.h>
#include <asm/irq_vectors.h>
/*
* Intel IO-APIC support for SMP and UP systems.
*
* Copyright (C) 1997, 1998, 1999, 2000 Ingo Molnar
*/
/* I/O Unit Redirection Table */
#define IO_APIC_REDIR_VECTOR_MASK 0x000FF
#define IO_APIC_REDIR_DEST_LOGICAL 0x00800
#define IO_APIC_REDIR_DEST_PHYSICAL 0x00000
#define IO_APIC_REDIR_SEND_PENDING (1 << 12)
#define IO_APIC_REDIR_REMOTE_IRR (1 << 14)
#define IO_APIC_REDIR_LEVEL_TRIGGER (1 << 15)
#define IO_APIC_REDIR_MASKED (1 << 16)
/*
* The structure of the IO-APIC:
*/
union IO_APIC_reg_00 {
u32 raw;
struct {
u32 __reserved_2 : 14,
LTS : 1,
delivery_type : 1,
__reserved_1 : 8,
ID : 8;
} __attribute__ ((packed)) bits;
};
union IO_APIC_reg_01 {
u32 raw;
struct {
u32 version : 8,
__reserved_2 : 7,
PRQ : 1,
entries : 8,
__reserved_1 : 8;
} __attribute__ ((packed)) bits;
};
union IO_APIC_reg_02 {
u32 raw;
struct {
u32 __reserved_2 : 24,
arbitration : 4,
__reserved_1 : 4;
} __attribute__ ((packed)) bits;
};
union IO_APIC_reg_03 {
u32 raw;
struct {
u32 boot_DT : 1,
__reserved_1 : 31;
} __attribute__ ((packed)) bits;
};
struct IO_APIC_route_entry {
__u32 vector : 8,
delivery_mode : 3, /* 000: FIXED
* 001: lowest prio
* 111: ExtINT
*/
dest_mode : 1, /* 0: physical, 1: logical */
delivery_status : 1,
polarity : 1,
irr : 1,
trigger : 1, /* 0: edge, 1: level */
mask : 1, /* 0: enabled, 1: disabled */
__reserved_2 : 15;
__u32 __reserved_3 : 24,
dest : 8;
} __attribute__ ((packed));
struct IR_IO_APIC_route_entry {
__u64 vector : 8,
zero : 3,
index2 : 1,
delivery_status : 1,
polarity : 1,
irr : 1,
trigger : 1,
mask : 1,
reserved : 31,
format : 1,
index : 15;
} __attribute__ ((packed));
#define IOAPIC_AUTO -1
#define IOAPIC_EDGE 0
#define IOAPIC_LEVEL 1
#ifdef CONFIG_X86_IO_APIC
/*
* # of IO-APICs and # of IRQ routing registers
*/
extern int nr_ioapics;
extern int nr_ioapic_registers[MAX_IO_APICS];
#define MP_MAX_IOAPIC_PIN 127
/* I/O APIC entries */
extern struct mpc_ioapic mp_ioapics[MAX_IO_APICS];
/* # of MP IRQ source entries */
extern int mp_irq_entries;
/* MP IRQ source entries */
extern struct mpc_intsrc mp_irqs[MAX_IRQ_SOURCES];
/* non-0 if default (table-less) MP configuration */
extern int mpc_default_type;
/* Older SiS APIC requires we rewrite the index register */
extern int sis_apic_bug;
/* 1 if "noapic" boot option passed */
extern int skip_ioapic_setup;
/* 1 if "noapic" boot option passed */
extern int noioapicquirk;
/* -1 if "noapic" boot option passed */
extern int noioapicreroute;
/* 1 if the timer IRQ uses the '8259A Virtual Wire' mode */
extern int timer_through_8259;
/*
* If we use the IO-APIC for IRQ routing, disable automatic
* assignment of PCI IRQ's.
*/
#define io_apic_assign_pci_irqs \
(mp_irq_entries && !skip_ioapic_setup && io_apic_irqs)
struct io_apic_irq_attr;
extern int io_apic_set_pci_routing(struct device *dev, int irq,
struct io_apic_irq_attr *irq_attr);
void setup_IO_APIC_irq_extra(u32 gsi);
extern void ioapic_and_gsi_init(void);
extern void ioapic_insert_resources(void);
int io_apic_setup_irq_pin_once(unsigned int irq, int node, struct io_apic_irq_attr *attr);
extern struct IO_APIC_route_entry **alloc_ioapic_entries(void);
extern void free_ioapic_entries(struct IO_APIC_route_entry **ioapic_entries);
extern int save_IO_APIC_setup(struct IO_APIC_route_entry **ioapic_entries);
extern void mask_IO_APIC_setup(struct IO_APIC_route_entry **ioapic_entries);
extern int restore_IO_APIC_setup(struct IO_APIC_route_entry **ioapic_entries);
extern int get_nr_irqs_gsi(void);
extern void setup_ioapic_ids_from_mpc(void);
extern void setup_ioapic_ids_from_mpc_nocheck(void);
struct mp_ioapic_gsi{
u32 gsi_base;
u32 gsi_end;
};
extern struct mp_ioapic_gsi mp_gsi_routing[];
extern u32 gsi_top;
int mp_find_ioapic(u32 gsi);
int mp_find_ioapic_pin(int ioapic, u32 gsi);
void __init mp_register_ioapic(int id, u32 address, u32 gsi_base);
extern void __init pre_init_apic_IRQ0(void);
extern void mp_save_irq(struct mpc_intsrc *m);
extern void disable_ioapic_support(void);
#else /* !CONFIG_X86_IO_APIC */
#define io_apic_assign_pci_irqs 0
#define setup_ioapic_ids_from_mpc x86_init_noop
static const int timer_through_8259 = 0;
static inline void ioapic_and_gsi_init(void) { }
static inline void ioapic_insert_resources(void) { }
#define gsi_top (NR_IRQS_LEGACY)
static inline int mp_find_ioapic(u32 gsi) { return 0; }
struct io_apic_irq_attr;
static inline int io_apic_set_pci_routing(struct device *dev, int irq,
struct io_apic_irq_attr *irq_attr) { return 0; }
static inline struct IO_APIC_route_entry **alloc_ioapic_entries(void)
{
return NULL;
}
static inline void free_ioapic_entries(struct IO_APIC_route_entry **ent) { }
static inline int save_IO_APIC_setup(struct IO_APIC_route_entry **ent)
{
return -ENOMEM;
}
static inline void mask_IO_APIC_setup(struct IO_APIC_route_entry **ent) { }
static inline int restore_IO_APIC_setup(struct IO_APIC_route_entry **ent)
{
return -ENOMEM;
}
static inline void mp_save_irq(struct mpc_intsrc *m) { };
static inline void disable_ioapic_support(void) { }
#endif
#endif /* _ASM_X86_IO_APIC_H */
