rom/kernel/prepareexecbase.c

   1 /*
   2     Copyright © 1995-2011, The AROS Development Team. All rights reserved.
   3     $Id$
   4
   5     ExecBase initialization, no-MMU version.
   6 */
   7
   8 #include <aros/asmcall.h>
   9 #include <exec/execbase.h>
  10 #include <exec/memory.h>
  11 #include <exec/resident.h>
  12 #include <proto/exec.h>
  13
  14 #include <kernel_base.h>
  15 #include <kernel_debug.h>
  16 #include <kernel_romtags.h>
  17
  18 struct ExecBase *krnPrepareExecBase(UWORD *ranges[], struct MemHeader *mh, struct TagItem *bootMsg)
  19 {
  20     struct Resident *exec;
  21     struct ExecBase *sysBase;
  22     struct Resident **resList = krnRomTagScanner(mh, ranges);
  23
  24     if (!resList)
  25     {
  26         krnPanic(NULL, "Failed to create initial resident list\n"
  27                        "Not enough memory space provided");
  28         return NULL;
  29     }
  30
  31     exec = krnFindResident(resList, "exec.library");
  32     if (!exec)
  33     {
  34         krnPanic(NULL, "Failed to create ExecBase\n"
  35                        "exec.library is not found");
  36         return NULL;
  37     }
  38
  39     /* Magic. Described in rom/exec/exec_init.c. */
  40     sysBase = krnInitExecBase(exec, mh, bootMsg);
  41
  42     if (!sysBase)
  43     {
  44         krnPanic(NULL, "Failed to create ExecBase\n"
  45                        "\n"
  46                        "MemHeader 0x%p, First chunk 0x%p, %u bytes free",
  47                        mh, mh->mh_First, mh->mh_Free);
  48
  49         return NULL;
  50     }
  51
  52     sysBase->ResModules = resList;
  53
  54 #ifndef NO_RUNTIME_DEBUG
  55     /* Print out modules list if requested by the user */
  56     if (SysBase->ex_DebugFlags & EXECDEBUGF_INITCODE)
  57     {
  58         ULONG i;
  59
  60         nbug("Resident modules (addr: pri flags version name):\n");
  61
  62         for (i = 0; resList[i]; i++)
  63         {
  64             nbug("+ %p: %4d %02x %3d \"%s\"\n", resList[i], resList[i]->rt_Pri,
  65                  resList[i]->rt_Flags, resList[i]->rt_Version, resList[i]->rt_Name);
  66         }
  67     }
  68 #endif
  69     return sysBase;
  70 }