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https://github.com/AuxXxilium/linux_dsm_epyc7002.git
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939b787130
Move the IRQ stub generation to assembly to simplify it and for consistency with 32 bits. Doing it in a C file with asm() statements doesn't help clarity, and it prevents some optimizations. Shrink the IRQ stubs down to just over four bytes per (we fit seven into a 32-byte chunk.) This shrinks the total icache consumption of the IRQ stubs down to an even kilobyte, if all of them are in active use. The downside is that we end up with a double jump, which could have a negative effect on some pipelines. The double jump is always inside the same cacheline on any modern chips. To get the most effect, cache-align the IRQ stubs. This makes the 64-bit code match changes already done to the 32-bit code, and should open up irqinit*.c for unification. Signed-off-by: H. Peter Anvin <hpa@zytor.com>
130 lines
3.7 KiB
C
130 lines
3.7 KiB
C
#ifndef _ASM_X86_HW_IRQ_H
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#define _ASM_X86_HW_IRQ_H
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/*
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* (C) 1992, 1993 Linus Torvalds, (C) 1997 Ingo Molnar
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*
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* moved some of the old arch/i386/kernel/irq.h to here. VY
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*
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* IRQ/IPI changes taken from work by Thomas Radke
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* <tomsoft@informatik.tu-chemnitz.de>
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*
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* hacked by Andi Kleen for x86-64.
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* unified by tglx
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*/
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#include <asm/irq_vectors.h>
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#ifndef __ASSEMBLY__
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#include <linux/percpu.h>
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#include <linux/profile.h>
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#include <linux/smp.h>
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#include <asm/atomic.h>
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#include <asm/irq.h>
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#include <asm/sections.h>
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#define platform_legacy_irq(irq) ((irq) < 16)
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/* Interrupt handlers registered during init_IRQ */
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extern void apic_timer_interrupt(void);
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extern void error_interrupt(void);
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extern void spurious_interrupt(void);
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extern void thermal_interrupt(void);
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extern void reschedule_interrupt(void);
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extern void invalidate_interrupt(void);
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extern void invalidate_interrupt0(void);
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extern void invalidate_interrupt1(void);
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extern void invalidate_interrupt2(void);
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extern void invalidate_interrupt3(void);
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extern void invalidate_interrupt4(void);
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extern void invalidate_interrupt5(void);
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extern void invalidate_interrupt6(void);
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extern void invalidate_interrupt7(void);
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extern void irq_move_cleanup_interrupt(void);
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extern void threshold_interrupt(void);
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extern void call_function_interrupt(void);
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extern void call_function_single_interrupt(void);
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/* PIC specific functions */
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extern void disable_8259A_irq(unsigned int irq);
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extern void enable_8259A_irq(unsigned int irq);
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extern int i8259A_irq_pending(unsigned int irq);
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extern void make_8259A_irq(unsigned int irq);
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extern void init_8259A(int aeoi);
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/* IOAPIC */
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#define IO_APIC_IRQ(x) (((x) >= 16) || ((1<<(x)) & io_apic_irqs))
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extern unsigned long io_apic_irqs;
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extern void init_VISWS_APIC_irqs(void);
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extern void setup_IO_APIC(void);
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extern void disable_IO_APIC(void);
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extern int IO_APIC_get_PCI_irq_vector(int bus, int slot, int fn);
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extern void setup_ioapic_dest(void);
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#ifdef CONFIG_X86_64
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extern void enable_IO_APIC(void);
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#endif
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/* IPI functions */
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#ifdef CONFIG_X86_32
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extern void send_IPI_self(int vector);
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#endif
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extern void send_IPI(int dest, int vector);
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/* Statistics */
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extern atomic_t irq_err_count;
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extern atomic_t irq_mis_count;
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/* EISA */
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extern void eisa_set_level_irq(unsigned int irq);
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/* Voyager functions */
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extern asmlinkage void vic_cpi_interrupt(void);
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extern asmlinkage void vic_sys_interrupt(void);
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extern asmlinkage void vic_cmn_interrupt(void);
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extern asmlinkage void qic_timer_interrupt(void);
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extern asmlinkage void qic_invalidate_interrupt(void);
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extern asmlinkage void qic_reschedule_interrupt(void);
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extern asmlinkage void qic_enable_irq_interrupt(void);
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extern asmlinkage void qic_call_function_interrupt(void);
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/* SMP */
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extern void smp_apic_timer_interrupt(struct pt_regs *);
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extern void smp_spurious_interrupt(struct pt_regs *);
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extern void smp_error_interrupt(struct pt_regs *);
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#ifdef CONFIG_X86_SMP
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extern void smp_reschedule_interrupt(struct pt_regs *);
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extern void smp_call_function_interrupt(struct pt_regs *);
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extern void smp_call_function_single_interrupt(struct pt_regs *);
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#ifdef CONFIG_X86_32
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extern void smp_invalidate_interrupt(struct pt_regs *);
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#else
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extern asmlinkage void smp_invalidate_interrupt(struct pt_regs *);
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#endif
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#endif
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extern void (*__initconst interrupt[NR_VECTORS-FIRST_EXTERNAL_VECTOR])(void);
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typedef int vector_irq_t[NR_VECTORS];
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DECLARE_PER_CPU(vector_irq_t, vector_irq);
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#ifdef CONFIG_X86_IO_APIC
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extern void lock_vector_lock(void);
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extern void unlock_vector_lock(void);
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extern void __setup_vector_irq(int cpu);
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#else
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static inline void lock_vector_lock(void) {}
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static inline void unlock_vector_lock(void) {}
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static inline void __setup_vector_irq(int cpu) {}
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#endif
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#endif /* !ASSEMBLY_ */
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#endif /* _ASM_X86_HW_IRQ_H */
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