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130fe05dbc
This is preparation for fixing the ordering of the accesses that
got broken by the commit cf4c6a2f27 when
factoring out the "common" io apic routing entry accesses.
Move the accessor function (that were only used by io_apic.c) out
of a header file, and use proper memory-mapped accesses rather than
making up our own "volatile" pointers.
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
156 lines
3.1 KiB
C
156 lines
3.1 KiB
C
#ifndef __ASM_IO_APIC_H
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#define __ASM_IO_APIC_H
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#include <asm/types.h>
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#include <asm/mpspec.h>
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/*
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* Intel IO-APIC support for SMP and UP systems.
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*
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* Copyright (C) 1997, 1998, 1999, 2000 Ingo Molnar
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*/
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#ifdef CONFIG_X86_IO_APIC
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/*
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* The structure of the IO-APIC:
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*/
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union IO_APIC_reg_00 {
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u32 raw;
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struct {
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u32 __reserved_2 : 14,
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LTS : 1,
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delivery_type : 1,
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__reserved_1 : 8,
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ID : 8;
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} __attribute__ ((packed)) bits;
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};
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union IO_APIC_reg_01 {
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u32 raw;
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struct {
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u32 version : 8,
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__reserved_2 : 7,
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PRQ : 1,
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entries : 8,
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__reserved_1 : 8;
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} __attribute__ ((packed)) bits;
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};
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union IO_APIC_reg_02 {
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u32 raw;
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struct {
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u32 __reserved_2 : 24,
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arbitration : 4,
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__reserved_1 : 4;
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} __attribute__ ((packed)) bits;
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};
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union IO_APIC_reg_03 {
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u32 raw;
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struct {
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u32 boot_DT : 1,
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__reserved_1 : 31;
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} __attribute__ ((packed)) bits;
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};
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/*
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* # of IO-APICs and # of IRQ routing registers
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*/
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extern int nr_ioapics;
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extern int nr_ioapic_registers[MAX_IO_APICS];
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enum ioapic_irq_destination_types {
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dest_Fixed = 0,
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dest_LowestPrio = 1,
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dest_SMI = 2,
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dest__reserved_1 = 3,
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dest_NMI = 4,
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dest_INIT = 5,
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dest__reserved_2 = 6,
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dest_ExtINT = 7
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};
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struct IO_APIC_route_entry {
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__u32 vector : 8,
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delivery_mode : 3, /* 000: FIXED
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* 001: lowest prio
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* 111: ExtINT
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*/
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dest_mode : 1, /* 0: physical, 1: logical */
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delivery_status : 1,
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polarity : 1,
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irr : 1,
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trigger : 1, /* 0: edge, 1: level */
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mask : 1, /* 0: enabled, 1: disabled */
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__reserved_2 : 15;
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union { struct { __u32
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__reserved_1 : 24,
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physical_dest : 4,
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__reserved_2 : 4;
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} physical;
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struct { __u32
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__reserved_1 : 24,
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logical_dest : 8;
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} logical;
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} dest;
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} __attribute__ ((packed));
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/*
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* MP-BIOS irq configuration table structures:
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*/
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/* I/O APIC entries */
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extern struct mpc_config_ioapic mp_ioapics[MAX_IO_APICS];
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/* # of MP IRQ source entries */
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extern int mp_irq_entries;
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/* MP IRQ source entries */
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extern struct mpc_config_intsrc mp_irqs[MAX_IRQ_SOURCES];
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/* non-0 if default (table-less) MP configuration */
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extern int mpc_default_type;
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/* Older SiS APIC requires we rewrite the index register */
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extern int sis_apic_bug;
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/* 1 if "noapic" boot option passed */
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extern int skip_ioapic_setup;
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static inline void disable_ioapic_setup(void)
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{
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skip_ioapic_setup = 1;
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}
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static inline int ioapic_setup_disabled(void)
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{
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return skip_ioapic_setup;
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}
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/*
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* If we use the IO-APIC for IRQ routing, disable automatic
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* assignment of PCI IRQ's.
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*/
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#define io_apic_assign_pci_irqs (mp_irq_entries && !skip_ioapic_setup && io_apic_irqs)
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#ifdef CONFIG_ACPI
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extern int io_apic_get_unique_id (int ioapic, int apic_id);
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extern int io_apic_get_version (int ioapic);
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extern int io_apic_get_redir_entries (int ioapic);
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extern int io_apic_set_pci_routing (int ioapic, int pin, int irq, int edge_level, int active_high_low);
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extern int timer_uses_ioapic_pin_0;
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#endif /* CONFIG_ACPI */
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extern int (*ioapic_renumber_irq)(int ioapic, int irq);
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#else /* !CONFIG_X86_IO_APIC */
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#define io_apic_assign_pci_irqs 0
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static inline void disable_ioapic_setup(void) { }
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#endif
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#endif
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