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Diffstat (limited to 'arch/x86/include/asm/io_apic.h')
-rw-r--r--arch/x86/include/asm/io_apic.h204
1 files changed, 204 insertions, 0 deletions
diff --git a/arch/x86/include/asm/io_apic.h b/arch/x86/include/asm/io_apic.h
new file mode 100644
index 000000000000..d35cbd7aa587
--- /dev/null
+++ b/arch/x86/include/asm/io_apic.h
@@ -0,0 +1,204 @@
+#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 */