arch/all-pc/exec/reset_init.c

   1 /*
   2     Copyright © 1995-2014, The AROS Development Team. All rights reserved.
   3     $Id$
   4
   5     Desc: Install default reset handlers
   6     Lang: english
   7 */
   8
   9 #include <exec/interrupts.h>
  10 #include <aros/symbolsets.h>
  11 #include <asm/io.h>
  12
  13 #include <proto/exec.h>
  14
  15 #include "exec_intern.h"
  16
  17 /* This reset handler is called if more modern system reset mechanisms fail
  18  * or are not available */
  19 AROS_INTH1(static ColdResetHandler, struct Interrupt *, handler)
  20 {
  21     AROS_INTFUNC_INIT
  22
  23     UBYTE action = handler->is_Node.ln_Type;
  24
  25     if (action == SD_ACTION_COLDREBOOT)
  26     {
  27         outb(0xFE, 0x64);
  28
  29         /*
  30          * On some machines (new PCs without a PS/2 controller), this might
  31          * not work. So we need to be able to return cleanly.
  32          */
  33     }
  34
  35     return FALSE;
  36
  37     AROS_INTFUNC_EXIT
  38 }
  39
  40 /* This reset handler is called for ColdReboot() */
  41 AROS_INTH1(static WarmResetHandler, struct Interrupt *, handler)
  42 {
  43     AROS_INTFUNC_INIT
  44
  45     UBYTE action = handler->is_Node.ln_Type;
  46
  47     if (action == SD_ACTION_WARMREBOOT)
  48     {
  49         /* Tell kernel to reboot */
  50         __asm__ __volatile__ ("int $0x80"::"a"(0x100));
  51     }
  52
  53     /* We really should not return from that */
  54     return FALSE;
  55
  56     AROS_INTFUNC_EXIT
  57 }
  58
  59 /* This reset handler is called if software power-off or reboot has not
  60  * occurred. It is called after the shutdown screen is shown so that the
  61  * system isn't still alive in the background */
  62 AROS_INTH1(static ShutdownHandler, struct Interrupt *, handler)
  63 {
  64     AROS_INTFUNC_INIT
  65
  66     SuperState();
  67     while (TRUE) asm volatile("hlt");
  68
  69     /* We really should not return from that */
  70     return FALSE;
  71
  72     AROS_INTFUNC_EXIT
  73 }
  74
  75 /* Install handlers */
  76 int Exec_ResetInit(struct IntExecBase *SysBase)
  77 {
  78     SysBase->ColdResetHandler.is_Node.ln_Pri = -64;
  79     SysBase->ColdResetHandler.is_Node.ln_Name = "keyboard controller reset";
  80     SysBase->ColdResetHandler.is_Code = (VOID_FUNC)ColdResetHandler;
  81     SysBase->ColdResetHandler.is_Data = &SysBase->ColdResetHandler;
  82     AddResetCallback(&SysBase->ColdResetHandler);
  83
  84     SysBase->WarmResetHandler.is_Node.ln_Pri = -64;
  85     SysBase->WarmResetHandler.is_Node.ln_Name = "kernel reset";
  86     SysBase->WarmResetHandler.is_Code = (VOID_FUNC)WarmResetHandler;
  87     SysBase->WarmResetHandler.is_Data = &SysBase->WarmResetHandler;
  88     AddResetCallback(&SysBase->WarmResetHandler);
  89
  90     SysBase->ShutdownHandler.is_Node.ln_Pri = -128;
  91     SysBase->ShutdownHandler.is_Node.ln_Name = "HLT shutdown";
  92     SysBase->ShutdownHandler.is_Code = (VOID_FUNC)ShutdownHandler;
  93     SysBase->ShutdownHandler.is_Data = &SysBase->ShutdownHandler;
  94     AddResetCallback(&SysBase->ShutdownHandler);
  95
  96     return 1;
  97 }
  98
  99 ADD2INITLIB(Exec_ResetInit, 0)