sys/arch/i386/include/i82093reg.h

   1 /*       $NetBSD: i82093reg.h,v 1.8 2008/07/03 14:02:25 drochner Exp $ */
   2
   3 #include <x86/i82093reg.h>
   4
   5 #ifdef _KERNEL
   6
   7 #if defined(_KERNEL_OPT)
   8 #include "opt_multiprocessor.h"
   9 #endif
  10
  11 #define ioapic_asm_ack(num) \
  12         movl    $0,_C_LABEL(local_apic)+LAPIC_EOI
  13
  14 #ifdef MULTIPROCESSOR
  15
  16 #define ioapic_asm_lock(num) \
  17         movl    $1,%esi                                         ;\
  18 77:                                                             \
  19         xchgl   %esi,PIC_LOCK(%edi)                             ;\
  20         testl   %esi,%esi                                       ;\
  21         jne     77b
  22
  23 #define ioapic_asm_unlock(num) \
  24         movl    $0,PIC_LOCK(%edi)
  25
  26 #else
  27
  28 #define ioapic_asm_lock(num)
  29 #define ioapic_asm_unlock(num)
  30
  31 #endif  /* MULTIPROCESSOR */
  32
  33 #define ioapic_mask(num) \
  34         movl    IS_PIC(%ebp),%edi                               ;\
  35         ioapic_asm_lock(num)                                    ;\
  36         movl    IS_PIN(%ebp),%esi                               ;\
  37         leal    0x10(%esi,%esi,1),%esi                          ;\
  38         movl    PIC_IOAPIC(%edi),%edi                           ;\
  39         movl    IOAPIC_SC_REG(%edi),%ebx                        ;\
  40         movl    %esi, (%ebx)                                    ;\
  41         movl    IOAPIC_SC_DATA(%edi),%ebx                       ;\
  42         movl    (%ebx),%esi                                     ;\
  43         orl     $IOAPIC_REDLO_MASK,%esi                         ;\
  44         movl    %esi,(%ebx)                                     ;\
  45         movl    IS_PIC(%ebp),%edi                               ;\
  46         ioapic_asm_unlock(num)
  47
  48 /*
  49  * Since this is called just before the interrupt stub exits, AND
  50  * because the apic ACK doesn't use any registers, all registers
  51  * can be used here.
  52  * XXX this is not obvious
  53  */
  54 #define ioapic_unmask(num) \
  55         movl    (%esp),%eax                                     ;\
  56         cmpl    $IREENT_MAGIC,(TF_ERR+4)(%eax)                  ;\
  57         jne     79f                                             ;\
  58         movl    IS_PIC(%ebp),%edi                               ;\
  59         ioapic_asm_lock(num)                                    ;\
  60         movl    IS_PIN(%ebp),%esi                               ;\
  61         leal    0x10(%esi,%esi,1),%esi                          ;\
  62         movl    PIC_IOAPIC(%edi),%edi                           ;\
  63         movl    IOAPIC_SC_REG(%edi),%ebx                        ;\
  64         movl    IOAPIC_SC_DATA(%edi),%eax                       ;\
  65         movl    %esi, (%ebx)                                    ;\
  66         movl    (%eax),%edx                                     ;\
  67         andl    $~IOAPIC_REDLO_MASK,%edx                        ;\
  68         movl    %esi, (%ebx)                                    ;\
  69         movl    %edx,(%eax)                                     ;\
  70         movl    IS_PIC(%ebp),%edi                               ;\
  71         ioapic_asm_unlock(num)                                  ;\
  72 79:
  73
  74 #endif