795fec2b60
ioapic register would stick across a read+write appears to be invalid for some ioapics. So, select it again for the mask write.
70 lines
1.5 KiB
C
70 lines
1.5 KiB
C
/* $NetBSD: i82093reg.h,v 1.6 2003/05/11 14:02:17 fvdl Exp $ */
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#include <x86/i82093reg.h>
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#ifdef _KERNEL
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#if defined(_KERNEL_OPT)
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#include "opt_multiprocessor.h"
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#endif
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#define ioapic_asm_ack(num) \
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movl $0,_C_LABEL(local_apic)+LAPIC_EOI
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#ifdef MULTIPROCESSOR
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#define ioapic_asm_lock(num) \
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movl $1,%esi ;\
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77: \
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xchgl %esi,PIC_LOCK(%edi) ;\
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testl %esi,%esi ;\
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jne 77b
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#define ioapic_asm_unlock(num) \
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movl $0,PIC_LOCK(%edi)
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#else
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#define ioapic_asm_lock(num)
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#define ioapic_asm_unlock(num)
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#endif /* MULTIPROCESSOR */
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#define ioapic_mask(num) \
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movl IS_PIC(%ebp),%edi ;\
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ioapic_asm_lock(num) ;\
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movl IS_PIN(%ebp),%esi ;\
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leal 0x10(%esi,%esi,1),%esi ;\
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movl IOAPIC_SC_REG(%edi),%ebx ;\
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movl %esi, (%ebx) ;\
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movl IOAPIC_SC_DATA(%edi),%ebx ;\
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movl (%ebx),%esi ;\
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orl $IOAPIC_REDLO_MASK,%esi ;\
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movl %esi,(%ebx) ;\
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ioapic_asm_unlock(num)
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/*
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* Since this is called just before the interrupt stub exits, AND
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* because the apic ACK doesn't use any registers, all registers
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* can be used here.
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* XXX this is not obvious
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*/
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#define ioapic_unmask(num) \
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cmpl $IREENT_MAGIC,(TF_ERR+4)(%esp) ;\
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jne 79f ;\
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movl IS_PIC(%ebp),%edi ;\
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ioapic_asm_lock(num) ;\
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movl IS_PIN(%ebp),%esi ;\
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leal 0x10(%esi,%esi,1),%esi ;\
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movl IOAPIC_SC_REG(%edi),%ebx ;\
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movl IOAPIC_SC_DATA(%edi),%eax ;\
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movl %esi, (%ebx) ;\
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movl (%eax),%edx ;\
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andl $~IOAPIC_REDLO_MASK,%edx ;\
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movl %esi, (%ebx) ;\
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movl %edx,(%eax) ;\
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ioapic_asm_unlock(num) ;\
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79:
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#endif
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