arch/i386-pc/dos/boot.c

   1 /*
   2     Copyright © 1995-2001, The AROS Development Team. All rights reserved.
   3     $Id$
   4
   5     Desc: Boot your operating system.
   6     Lang: english
   7 */
   8
   9 #include <exec/types.h>
  10 #include <exec/alerts.h>
  11 #include <exec/libraries.h>
  12 #include <exec/devices.h>
  13 #include <exec/execbase.h>
  14 #include <aros/libcall.h>
  15 #include <aros/asmcall.h>
  16 #include <dos/dosextens.h>
  17 #include <utility/tagitem.h>
  18 #include <aros/arossupportbase.h>
  19 #include <aros/debug.h>
  20
  21 #include <proto/exec.h>
  22 #include <proto/dos.h>
  23
  24 /* Require this for the stdout defn */
  25 #include <stdio.h>
  26
  27 extern void AROSSupportBase_SetStdOut (void *);
  28 extern int submain(struct ExecBase *, struct DosLibrary *);
  29
  30 struct emulbase
  31 {
  32     struct Device eb_device;
  33     struct Unit *eb_stdin;
  34     struct Unit *eb_stdout;
  35     struct Unit *eb_stderr;
  36 };
  37
  38 AROS_UFH3(void, boot,
  39     AROS_UFHA(STRPTR, argString, A0),
  40     AROS_UFHA(ULONG, argSize, D0),
  41     AROS_UFHA(struct ExecBase *, SysBase, A6)
  42 )
  43 {
  44     AROS_USERFUNC_INIT
  45     /*  We have been created as a process by DOS, we should now
  46         try and boot the system. We do this by calling the submain()
  47         function in arosshell.c
  48
  49         DOS has created our process, but it has not given us
  50         the correct I/O Streams yet. What we have to do is
  51         to (conditionally) close the old streams, and set
  52         our own, which we get from emul.handler.
  53
  54         This is really only necessary if
  55         a) We want to use the XTerm as our boot shell
  56         b) Don't have a working console.device/CON: handler.
  57     */
  58
  59     struct DosLibrary *DOSBase;
  60 //    struct emulbase *emulbase;
  61     struct TagItem fhtags[]= { { TAG_END, 0 } };
  62 //    struct FileHandle *fh_stdin, *fh_stdout;
  63
  64     DOSBase = (struct DosLibrary *)OpenLibrary("dos.library", 0);
  65     if( DOSBase == NULL )
  66     {
  67         /* BootStrap couldn't open dos.library */
  68         Alert(AT_DeadEnd | AN_BootStrap | AG_OpenLib | AO_DOSLib );
  69     }
  70
  71     /*
  72         This is quite naughty, but I know what I'm doing here, since
  73         emul.handler ALWAYS exists under Unix, and it won't go away.
  74     */
  75
  76 /*
  77     Forbid();
  78     emulbase = (struct emulbase *)FindName(&SysBase->DeviceList, "emul.handler");
  79     Permit();
  80
  81     if( emulbase == NULL )
  82     {
  83 */
  84         /* BootStrap couldn't open unknown */
  85 /*
  86         Alert(AT_DeadEnd | AN_BootStrap | AG_OpenDev | AO_Unknown );
  87     }
  88
  89     fh_stdin = AllocDosObject(DOS_FILEHANDLE, fhtags);
  90     fh_stdout = AllocDosObject(DOS_FILEHANDLE, fhtags);
  91
  92     if(fh_stdin == NULL || fh_stdout == NULL)
  93     {
  94 */
  95         /* We have got some problems here. */
  96 /*      Alert(AT_DeadEnd | AN_BootStrap | AG_NoMemory);
  97     }
  98
  99     fh_stdin->fh_Device  =&emulbase->eb_device;
 100     fh_stdin->fh_Unit    =emulbase->eb_stdin;
 101     fh_stdout->fh_Device =&emulbase->eb_device;
 102     fh_stdout->fh_Unit   =emulbase->eb_stdout;
 103
 104     if(Input())
 105         Close(Input());
 106     if(Output())
 107         Close(Output());
 108
 109     SelectInput(MKBADDR(fh_stdin));
 110     SelectOutput(MKBADDR(fh_stdout));
 111     ((struct Process *)FindTask(NULL))->pr_CES = MKBADDR(fh_stdout);
 112
 113     AROSSupportBase_SetStdOut (stderr);
 114 */
 115     submain(SysBase, DOSBase);
 116
 117     /* submain() returns, when the Boot Shell Window is left with EndShell/EndCli */
 118
 119     /* To avoid that the input/output/error handles of emul.handler
 120        are closed when the Boot Process dies, we set the in/out/err
 121        handles of this process to 0.
 122     */
 123
 124 /*
 125     SelectInput(0);
 126     SelectOutput(0);
 127     ((struct Process *)FindTask(NULL))->pr_CES = 0;
 128 */
 129
 130     /* No RemTask() here, otherwise the process cleanup routines
 131        are not called. And that would for example mean, that the
 132        Boot Process (having a CLI) is not removed from the rootnode.
 133        --> Dead stuff in there -> Crash
 134     */
 135     return;
 136     AROS_USERFUNC_EXIT
 137 }