mirror of https://gitee.com/openkylin/linux.git
45 lines
1013 B
C
45 lines
1013 B
C
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/* two abstractions specific to kernel/smpboot.c, mainly to cater to visws
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* which needs to alter them. */
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static inline void smpboot_clear_io_apic_irqs(void)
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{
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io_apic_irqs = 0;
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}
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static inline void smpboot_setup_warm_reset_vector(unsigned long start_eip)
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{
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CMOS_WRITE(0xa, 0xf);
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local_flush_tlb();
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Dprintk("1.\n");
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*((volatile unsigned short *) TRAMPOLINE_HIGH) = start_eip >> 4;
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Dprintk("2.\n");
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*((volatile unsigned short *) TRAMPOLINE_LOW) = start_eip & 0xf;
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Dprintk("3.\n");
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}
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static inline void smpboot_restore_warm_reset_vector(void)
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{
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/*
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* Install writable page 0 entry to set BIOS data area.
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*/
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local_flush_tlb();
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/*
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* Paranoid: Set warm reset code and vector here back
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* to default values.
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*/
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CMOS_WRITE(0, 0xf);
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*((volatile long *) phys_to_virt(0x467)) = 0;
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}
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static inline void smpboot_setup_io_apic(void)
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{
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/*
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* Here we can be sure that there is an IO-APIC in the system. Let's
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* go and set it up:
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*/
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if (!skip_ioapic_setup && nr_ioapics)
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setup_IO_APIC();
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}
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