arch/all-pc/boot/grub2-aros/grub-core/kern/i386/coreboot/init.c

   1 /*
   2  *  GRUB  --  GRand Unified Bootloader
   3  *  Copyright (C) 2002,2003,2004,2005,2006,2007,2008,2009  Free Software Foundation, Inc.
   4  *
   5  *  GRUB is free software: you can redistribute it and/or modify
   6  *  it under the terms of the GNU General Public License as published by
   7  *  the Free Software Foundation, either version 3 of the License, or
   8  *  (at your option) any later version.
   9  *
  10  *  GRUB is distributed in the hope that it will be useful,
  11  *  but WITHOUT ANY WARRANTY; without even the implied warranty of
  12  *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  13  *  GNU General Public License for more details.
  14  *
  15  *  You should have received a copy of the GNU General Public License
  16  *  along with GRUB.  If not, see <http://www.gnu.org/licenses/>.
  17  */
  18
  19 #include <grub/kernel.h>
  20 #include <grub/mm.h>
  21 #include <grub/machine/time.h>
  22 #include <grub/machine/memory.h>
  23 #include <grub/machine/console.h>
  24 #include <grub/offsets.h>
  25 #include <grub/types.h>
  26 #include <grub/err.h>
  27 #include <grub/dl.h>
  28 #include <grub/misc.h>
  29 #include <grub/loader.h>
  30 #include <grub/env.h>
  31 #include <grub/cache.h>
  32 #include <grub/time.h>
  33 #include <grub/symbol.h>
  34 #include <grub/cpu/io.h>
  35 #include <grub/cpu/floppy.h>
  36 #include <grub/cpu/tsc.h>
  37 #ifdef GRUB_MACHINE_QEMU
  38 #include <grub/machine/kernel.h>
  39 #endif
  40
  41 extern grub_uint8_t _start[];
  42 extern grub_uint8_t _end[];
  43 extern grub_uint8_t _edata[];
  44
  45 void  __attribute__ ((noreturn))
  46 grub_exit (void)
  47 {
  48   /* We can't use grub_fatal() in this function.  This would create an infinite
  49      loop, since grub_fatal() calls grub_abort() which in turn calls grub_exit().  */
  50   while (1)
  51     grub_cpu_idle ();
  52 }
  53
  54 #ifdef GRUB_MACHINE_QEMU
  55 grub_addr_t grub_modbase;
  56 #else
  57 grub_addr_t grub_modbase = ALIGN_UP((grub_addr_t) _end, GRUB_KERNEL_MACHINE_MOD_ALIGN);
  58 #endif
  59
  60 void
  61 grub_machine_init (void)
  62 {
  63 #ifdef GRUB_MACHINE_QEMU
  64   grub_modbase = grub_core_entry_addr + (_edata - _start);
  65
  66   grub_qemu_init_cirrus ();
  67 #endif
  68   /* Initialize the console as early as possible.  */
  69   grub_vga_text_init ();
  70
  71   auto int NESTED_FUNC_ATTR heap_init (grub_uint64_t, grub_uint64_t,
  72                                        grub_memory_type_t);
  73   int NESTED_FUNC_ATTR heap_init (grub_uint64_t addr, grub_uint64_t size,
  74                                   grub_memory_type_t type)
  75   {
  76 #if GRUB_CPU_SIZEOF_VOID_P == 4
  77     /* Restrict ourselves to 32-bit memory space.  */
  78     if (addr > GRUB_ULONG_MAX)
  79       return 0;
  80     if (addr + size > GRUB_ULONG_MAX)
  81       size = GRUB_ULONG_MAX - addr;
  82 #endif
  83
  84     if (type != GRUB_MEMORY_AVAILABLE)
  85       return 0;
  86
  87     /* Avoid the lower memory.  */
  88     if (addr < GRUB_MEMORY_MACHINE_LOWER_SIZE)
  89       {
  90         if (addr + size <= GRUB_MEMORY_MACHINE_LOWER_SIZE)
  91           return 0;
  92         else
  93           {
  94             size -= GRUB_MEMORY_MACHINE_LOWER_SIZE - addr;
  95             addr = GRUB_MEMORY_MACHINE_LOWER_SIZE;
  96           }
  97       }
  98
  99     grub_mm_init_region ((void *) (grub_addr_t) addr, (grub_size_t) size);
 100
 101     return 0;
 102   }
 103
 104 #if defined (GRUB_MACHINE_MULTIBOOT) || defined (GRUB_MACHINE_QEMU)
 105   grub_machine_mmap_init ();
 106 #endif
 107   grub_machine_mmap_iterate (heap_init);
 108
 109   grub_tsc_init ();
 110 }
 111
 112 void
 113 grub_machine_get_bootlocation (char **device __attribute__ ((unused)),
 114                                char **path __attribute__ ((unused)))
 115 {
 116 }
 117
 118 void
 119 grub_machine_fini (void)
 120 {
 121   grub_vga_text_fini ();
 122   grub_stop_floppy ();
 123 }