rom/kernel/kernel_init.c

   1 /*
   2     Copyright © 2010-2017, The AROS Development Team. All rights reserved.
   3     $Id$
   4
   5     Desc: Main kernel.resource initialization.
   6     Lang: english
   7 */
   8
   9 #include <aros/asmcall.h>
  10 #include <aros/kernel.h>
  11 #include <aros/symbolsets.h>
  12 #include <exec/resident.h>
  13 #include <proto/arossupport.h>
  14 #include <proto/exec.h>
  15
  16 #include <inttypes.h>
  17 #include <stdlib.h>
  18 #include <string.h>
  19
  20 #include LC_LIBDEFS_FILE
  21
  22 #include <kernel_globals.h>
  23
  24 #include <kernel_debug.h>
  25
  26 /* We have own bug(), so don't use aros/debug.h to avoid conflicts */
  27 #define D(x)
  28
  29 static const UBYTE version[];
  30 extern const char LIBEND;
  31
  32 AROS_UFP3S(struct KernelBase *, Kernel_Init,
  33     AROS_UFPA(ULONG, dummy, D0),
  34     AROS_UFPA(BPTR, segList, A0),
  35     AROS_UFPA(struct ExecBase *, sysBase, A6));
  36
  37 const struct Resident Kernel_resident =
  38 {
  39     RTC_MATCHWORD,
  40     (struct Resident *)&Kernel_resident,
  41     (APTR)&LIBEND,
  42     RTF_SINGLETASK,
  43     VERSION_NUMBER,
  44     NT_LIBRARY,
  45     RESIDENTPRI,
  46     MOD_NAME_STRING,
  47     (STRPTR)&version[6],
  48     Kernel_Init
  49 };
  50
  51 static const UBYTE version[] = VERSION_STRING;
  52
  53 void __clear_bss(const struct KernelBSS *bss)
  54 {
  55     while (bss->addr)
  56     {
  57         bzero((void*)bss->addr, bss->len);
  58         bss++;
  59     }
  60 }
  61
  62 extern const APTR GM_UNIQUENAME(FuncTable)[];
  63
  64 THIS_PROGRAM_HANDLES_SYMBOLSET(INITLIB)
  65 DEFINESET(INITLIB)
  66
  67 /*
  68  * Init routine is intentionally written by hands.
  69  * It can use kernel's own memory allocator (if implemented) for KernelBase creation.
  70  * This allows not to rely on working exec's memory management before kernel.resource
  71  * is set up. This can simplify exec.library code on MMU-aware systems.
  72  * exec.library catches our AddResource() and sets up its pooled memory manager.
  73  */
  74
  75 AROS_UFH3S(struct KernelBase *, Kernel_Init,
  76     AROS_UFHA(ULONG, dummy, D0),
  77     AROS_UFHA(BPTR, segList, A0),
  78     AROS_UFHA(struct ExecBase *, SysBase, A6)
  79 )
  80 {
  81     AROS_USERFUNC_INIT
  82
  83     struct KernelBase *KernelBase = NULL;
  84     int i;
  85
  86     D(bug("[KRN] Kernel_Init()\n"));
  87
  88     KernelBase = AllocKernelBase(SysBase);
  89     if (!KernelBase)
  90         return NULL;
  91
  92     KernelBase->kb_Node.ln_Type = NT_RESOURCE;
  93     KernelBase->kb_Node.ln_Pri  = RESIDENTPRI;
  94     KernelBase->kb_Node.ln_Name = MOD_NAME_STRING;
  95
  96     MakeFunctions(KernelBase, GM_UNIQUENAME(FuncTable), NULL);
  97
  98     D(bug("[KRN] KernelBase 0x%p\n", KernelBase));
  99
 100     for (i=0; i < EXCEPTIONS_COUNT; i++)
 101         NEWLIST(&KernelBase->kb_Exceptions[i]);
 102
 103     for (i=0; i < HW_IRQ_COUNT; i++)
 104         NEWLIST(&KERNELIRQ_LIST(i));
 105
 106     /*
 107      * Everything is ok, add our resource.
 108      * exec.library catches this call and sets up its memory management.
 109      * At this point kernel.resource's debug I/O and memory management must be
 110      * fully functional. After this we'll be able to safely call CreatePool() etc.
 111      */
 112     AddResource(KernelBase);
 113
 114     /* Call platform-specific init code */
 115     if (!set_call_libfuncs(SETNAME(INITLIB), 1, 1, KernelBase))
 116         return NULL;
 117
 118     D(bug("[KRN] Kernel_Init() done\n"));
 119
 120     /* Set global KernelBase storage and return */
 121     D(bug("[%s] Set global KernelBase\n"));
 122     setKernelBase(KernelBase);
 123
 124     return KernelBase;
 125
 126     AROS_USERFUNC_EXIT;
 127 }