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- #ifndef __ASM_IO_APIC_H
- #define __ASM_IO_APIC_H
-
- #include <linux/config.h>
- #include <asm/types.h>
- #include <asm/mpspec.h>
-
- /*
- * Intel IO-APIC support for SMP and UP systems.
- *
- * Copyright (C) 1997, 1998, 1999, 2000 Ingo Molnar
- */
-
- #ifdef CONFIG_X86_IO_APIC
-
- #ifdef CONFIG_PCI_MSI
- static inline int use_pci_vector(void) {return 1;}
- static inline void disable_edge_ioapic_vector(unsigned int vector) { }
- static inline void mask_and_ack_level_ioapic_vector(unsigned int vector) { }
- static inline void end_edge_ioapic_vector (unsigned int vector) { }
- #define startup_level_ioapic startup_level_ioapic_vector
- #define shutdown_level_ioapic mask_IO_APIC_vector
- #define enable_level_ioapic unmask_IO_APIC_vector
- #define disable_level_ioapic mask_IO_APIC_vector
- #define mask_and_ack_level_ioapic mask_and_ack_level_ioapic_vector
- #define end_level_ioapic end_level_ioapic_vector
- #define set_ioapic_affinity set_ioapic_affinity_vector
-
- #define startup_edge_ioapic startup_edge_ioapic_vector
- #define shutdown_edge_ioapic disable_edge_ioapic_vector
- #define enable_edge_ioapic unmask_IO_APIC_vector
- #define disable_edge_ioapic disable_edge_ioapic_vector
- #define ack_edge_ioapic ack_edge_ioapic_vector
- #define end_edge_ioapic end_edge_ioapic_vector
- #else
- static inline int use_pci_vector(void) {return 0;}
- static inline void disable_edge_ioapic_irq(unsigned int irq) { }
- static inline void mask_and_ack_level_ioapic_irq(unsigned int irq) { }
- static inline void end_edge_ioapic_irq (unsigned int irq) { }
- #define startup_level_ioapic startup_level_ioapic_irq
- #define shutdown_level_ioapic mask_IO_APIC_irq
- #define enable_level_ioapic unmask_IO_APIC_irq
- #define disable_level_ioapic mask_IO_APIC_irq
- #define mask_and_ack_level_ioapic mask_and_ack_level_ioapic_irq
- #define end_level_ioapic end_level_ioapic_irq
- #define set_ioapic_affinity set_ioapic_affinity_irq
-
- #define startup_edge_ioapic startup_edge_ioapic_irq
- #define shutdown_edge_ioapic disable_edge_ioapic_irq
- #define enable_edge_ioapic unmask_IO_APIC_irq
- #define disable_edge_ioapic disable_edge_ioapic_irq
- #define ack_edge_ioapic ack_edge_ioapic_irq
- #define end_edge_ioapic end_edge_ioapic_irq
- #endif
-
- #define IO_APIC_BASE(idx) \
- ((volatile int *)(__fix_to_virt(FIX_IO_APIC_BASE_0 + idx) \
- + (mp_ioapics[idx].mpc_apicaddr & ~PAGE_MASK)))
-
- /*
- * 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;
- };
-
- /*
- * # of IO-APICs and # of IRQ routing registers
- */
- extern int nr_ioapics;
- extern int nr_ioapic_registers[MAX_IO_APICS];
-
- 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;
-
- union { struct { __u32
- __reserved_1 : 24,
- physical_dest : 4,
- __reserved_2 : 4;
- } physical;
-
- struct { __u32
- __reserved_1 : 24,
- logical_dest : 8;
- } logical;
- } dest;
-
- } __attribute__ ((packed));
-
- /*
- * MP-BIOS irq configuration table structures:
- */
-
- /* I/O APIC entries */
- extern struct mpc_config_ioapic mp_ioapics[MAX_IO_APICS];
-
- /* # of MP IRQ source entries */
- extern int mp_irq_entries;
-
- /* MP IRQ source entries */
- extern struct mpc_config_intsrc mp_irqs[MAX_IRQ_SOURCES];
-
- /* non-0 if default (table-less) MP configuration */
- extern int mpc_default_type;
-
- static inline unsigned int io_apic_read(unsigned int apic, unsigned int reg)
- {
- *IO_APIC_BASE(apic) = reg;
- return *(IO_APIC_BASE(apic)+4);
- }
-
- static inline void io_apic_write(unsigned int apic, unsigned int reg, unsigned int value)
- {
- *IO_APIC_BASE(apic) = reg;
- *(IO_APIC_BASE(apic)+4) = value;
- }
-
- /*
- * Re-write a value: to be used for read-modify-write
- * cycles where the read already set up the index register.
- *
- * Older SiS APIC requires we rewrite the index regiser
- */
- extern int sis_apic_bug;
- static inline void io_apic_modify(unsigned int apic, unsigned int reg, unsigned int value)
- {
- if (sis_apic_bug)
- *IO_APIC_BASE(apic) = reg;
- *(IO_APIC_BASE(apic)+4) = value;
- }
-
- /* 1 if "noapic" boot option passed */
- extern int skip_ioapic_setup;
-
- /*
- * 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_BOOT
- 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_BOOT*/
-
- extern int (*ioapic_renumber_irq)(int ioapic, int irq);
-
- #else /* !CONFIG_X86_IO_APIC */
- #define io_apic_assign_pci_irqs 0
- #endif
-
- extern int assign_irq_vector(int irq);
-
- #endif
-