home *** CD-ROM | disk | FTP | other *** search
- #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;
- };
-
- enum ioapic_irq_destination_types {
- dest_Fixed = 0,
- dest_LowestPrio = 1,
- dest_SMI = 2,
- dest__reserved_1 = 3,
- dest_NMI = 4,
- dest_INIT = 5,
- dest__reserved_2 = 6,
- dest_ExtINT = 7
- };
-
- 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));
-
- #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];
-
- /*
- * MP-BIOS irq configuration table structures:
- */
-
- #define MP_MAX_IOAPIC_PIN 127
-
- struct mp_config_ioapic {
- unsigned long mp_apicaddr;
- unsigned int mp_apicid;
- unsigned char mp_type;
- unsigned char mp_apicver;
- unsigned char mp_flags;
- };
-
- struct mp_config_intsrc {
- unsigned int mp_dstapic;
- unsigned char mp_type;
- unsigned char mp_irqtype;
- unsigned short mp_irqflag;
- unsigned char mp_srcbus;
- unsigned char mp_srcbusirq;
- unsigned char mp_dstirq;
- };
-
- /* I/O APIC entries */
- extern struct mp_config_ioapic mp_ioapics[MAX_IO_APICS];
-
- /* # of MP IRQ source entries */
- extern int mp_irq_entries;
-
- /* MP IRQ source entries */
- extern struct mp_config_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 the timer IRQ uses the '8259A Virtual Wire' mode */
- extern int timer_through_8259;
-
- static inline void disable_ioapic_setup(void)
- {
- skip_ioapic_setup = 1;
- }
-
- /*
- * 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)
-
- #ifdef CONFIG_ACPI
- extern int io_apic_get_unique_id(int ioapic, int apic_id);
- extern int io_apic_get_version(int ioapic);
- extern int io_apic_get_redir_entries(int ioapic);
- extern int io_apic_set_pci_routing(int ioapic, int pin, int irq,
- int edge_level, int active_high_low);
- #endif /* CONFIG_ACPI */
-
- extern int (*ioapic_renumber_irq)(int ioapic, int irq);
- extern void ioapic_init_mappings(void);
-
- #ifdef CONFIG_X86_64
- extern int save_mask_IO_APIC_setup(void);
- extern void restore_IO_APIC_setup(void);
- extern void reinit_intr_remapped_IO_APIC(int);
- #endif
-
- extern int probe_nr_irqs(void);
-
- #else /* !CONFIG_X86_IO_APIC */
- #define io_apic_assign_pci_irqs 0
- static const int timer_through_8259 = 0;
- static inline void ioapic_init_mappings(void) { }
-
- static inline int probe_nr_irqs(void)
- {
- return NR_IRQS;
- }
- #endif
-
- #endif /* _ASM_X86_IO_APIC_H */
-