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/* SPDX-License-Identifier: GPL-2.0 */
#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>
#include <asm/x86_init.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));

struct irq_alloc_info;
struct ioapic_domain_cfg;

#define IOAPIC_AUTO			-1
#define IOAPIC_EDGE			0
#define IOAPIC_LEVEL			1

#define IOAPIC_MASKED			1
#define IOAPIC_UNMASKED			0

#define IOAPIC_POL_HIGH			0
#define IOAPIC_POL_LOW			1

#define IOAPIC_DEST_MODE_PHYSICAL	0
#define IOAPIC_DEST_MODE_LOGICAL	1

#define	IOAPIC_MAP_ALLOC		0x1
#define	IOAPIC_MAP_CHECK		0x2

#ifdef CONFIG_X86_IO_APIC

/*
 * # of IO-APICs and # of IRQ routing registers
 */
extern int nr_ioapics;

extern int mpc_ioapic_id(int ioapic);
extern unsigned int mpc_ioapic_addr(int ioapic);

/* # of MP IRQ source entries */
extern int mp_irq_entries;

/* MP IRQ source entries */
extern struct mpc_intsrc mp_irqs[MAX_IRQ_SOURCES];

/* 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;

extern u32 gsi_top;

extern unsigned long io_apic_irqs;

#define IO_APIC_IRQ(x) (((x) >= NR_IRQS_LEGACY) || ((1 << (x)) & io_apic_irqs))

/*
 * 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 irq_cfg;
extern void ioapic_insert_resources(void);
extern int arch_early_ioapic_init(void);

extern int save_ioapic_entries(void);
extern void mask_ioapic_entries(void);
extern int restore_ioapic_entries(void);

extern void setup_ioapic_ids_from_mpc(void);
extern void setup_ioapic_ids_from_mpc_nocheck(void);

extern int mp_find_ioapic(u32 gsi);
extern int mp_find_ioapic_pin(int ioapic, u32 gsi);
extern int mp_map_gsi_to_irq(u32 gsi, unsigned int flags,
			     struct irq_alloc_info *info);
extern void mp_unmap_irq(int irq);
extern int mp_register_ioapic(int id, u32 address, u32 gsi_base,
			      struct ioapic_domain_cfg *cfg);
extern int mp_unregister_ioapic(u32 gsi_base);
extern int mp_ioapic_registered(u32 gsi_base);

extern void ioapic_set_alloc_attr(struct irq_alloc_info *info,
				  int node, int trigger, int polarity);

extern void mp_save_irq(struct mpc_intsrc *m);

extern void disable_ioapic_support(void);

extern void __init io_apic_init_mappings(void);
extern unsigned int native_io_apic_read(unsigned int apic, unsigned int reg);
extern void native_disable_io_apic(void);

static inline unsigned int io_apic_read(unsigned int apic, unsigned int reg)
{
	return x86_io_apic_ops.read(apic, reg);
}

extern void setup_IO_APIC(void);
extern void enable_IO_APIC(void);
extern void disable_IO_APIC(void);
extern int IO_APIC_get_PCI_irq_vector(int bus, int devfn, int pin);
extern void print_IO_APICs(void);
#else  /* !CONFIG_X86_IO_APIC */

#define IO_APIC_IRQ(x)		0
#define io_apic_assign_pci_irqs 0
#define setup_ioapic_ids_from_mpc x86_init_noop
static inline void ioapic_insert_resources(void) { }
static inline int arch_early_ioapic_init(void) { return 0; }
static inline void print_IO_APICs(void) {}
#define gsi_top (NR_IRQS_LEGACY)
static inline int mp_find_ioapic(u32 gsi) { return 0; }
static inline int mp_map_gsi_to_irq(u32 gsi, unsigned int flags,
				    struct irq_alloc_info *info)
{
	return gsi;
}

static inline void mp_unmap_irq(int irq) { }

static inline int save_ioapic_entries(void)
{
	return -ENOMEM;
}

static inline void mask_ioapic_entries(void) { }
static inline int restore_ioapic_entries(void)
{
	return -ENOMEM;
}

static inline void mp_save_irq(struct mpc_intsrc *m) { }
static inline void disable_ioapic_support(void) { }
static inline void io_apic_init_mappings(void) { }
#define native_io_apic_read		NULL
#define native_disable_io_apic		NULL

static inline void setup_IO_APIC(void) { }
static inline void enable_IO_APIC(void) { }

#endif

#endif /* _ASM_X86_IO_APIC_H */

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Name Type Size Permission Actions
crypto Folder 0755
e820 Folder 0755
fpu Folder 0755
numachip Folder 0755
trace Folder 0755
uv Folder 0755
xen Folder 0755
Kbuild File 294 B 0644
a.out-core.h File 1.89 KB 0644
acenv.h File 1.56 KB 0644
acpi.h File 4.76 KB 0644
agp.h File 1.04 KB 0644
alternative-asm.h File 2.43 KB 0644
alternative.h File 8.28 KB 0644
amd_nb.h File 2.98 KB 0644
apb_timer.h File 1.43 KB 0644
apic.h File 14.53 KB 0644
apic_flat_64.h File 151 B 0644
apicdef.h File 11.26 KB 0644
apm.h File 1.8 KB 0644
arch_hweight.h File 1.28 KB 0644
archrandom.h File 3.03 KB 0644
asm-offsets.h File 35 B 0644
asm-prototypes.h File 946 B 0644
asm.h File 4.97 KB 0644
atomic.h File 6.02 KB 0644
atomic64_32.h File 8.71 KB 0644
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checksum.h File 133 B 0644
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dma.h File 9.58 KB 0644
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fixmap.h File 6.04 KB 0644
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ftrace.h File 1.8 KB 0644
futex.h File 2.2 KB 0644
gart.h File 2.64 KB 0644
genapic.h File 22 B 0644
geode.h File 842 B 0644
hardirq.h File 2.3 KB 0644
highmem.h File 2.6 KB 0644
hpet.h File 3.38 KB 0644
hugetlb.h File 2.15 KB 0644
hw_breakpoint.h File 1.96 KB 0644
hw_irq.h File 3.85 KB 0644
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i8259.h File 1.93 KB 0644
ia32.h File 1.46 KB 0644
ia32_unistd.h File 313 B 0644
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inat.h File 6.58 KB 0644
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intel-family.h File 3.47 KB 0644
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intel_mid_vrtc.h File 326 B 0644
intel_pmc_ipc.h File 2.08 KB 0644
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smp.h File 4.73 KB 0644
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stacktrace.h File 2.57 KB 0644
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svm.h File 7.08 KB 0644
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