arch/x86_64-pc/exec/enable.c

   1 /*
   2     Copyright © 1995-2001, The AROS Development Team. All rights reserved.
   3     $Id: enable.c 22006 2004-08-05 19:06:53Z stegerg $
   4
   5     Desc: i386unix version of Enable()
   6     Lang: english
   7 */
   8
   9 #include <exec/tasks.h>
  10 #include <exec/execbase.h>
  11 #include <aros/libcall.h>
  12 #include <aros/atomic.h>
  13 #include <aros/debug.h>
  14 //#include <asm/segments.h>
  15 #include <proto/exec.h>
  16 #include <proto/kernel.h>
  17 #include "exec_intern.h"
  18
  19 #include "x86_64.h"
  20
  21 #undef  Exec
  22 #ifdef UseExecstubs
  23 #    define Exec _Exec
  24 #endif
  25
  26 AROS_LH0(void, Enable,
  27     struct ExecBase *, SysBase, 21, Exec)
  28 {
  29 #undef Exec
  30     AROS_LIBFUNC_INIT
  31
  32     void *KernelBase = TLS_GET(KernelBase);
  33
  34     AROS_ATOMIC_DEC(SysBase->IDNestCnt);
  35
  36     if(SysBase->IDNestCnt < 0)
  37     {
  38         if (KernelBase)
  39             KrnSti();
  40
  41         /* There's no dff09c like thing in x86 native which would allow
  42            us to set delayed (mark it as pending but it gets triggered
  43            only once interrupts are enabled again) software interrupt,
  44            so we check it manually here in Enable() == same stuff as
  45            in Permit(). */
  46
  47         if ((SysBase->TDNestCnt < 0) && (SysBase->AttnResched & ARF_AttnSwitch))
  48         {
  49             if (IN_USER_MODE) KrnSchedule();
  50         }
  51
  52         if (SysBase->SysFlags & SFF_SoftInt)
  53         {
  54             if (IN_USER_MODE)
  55             {
  56                 /* sys_Cause */
  57                 KrnCause();
  58             }
  59         }
  60     }
  61
  62     AROS_LIBFUNC_EXIT
  63 }