kernel.h 4.12 KB
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/*
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 *  GRUB  --  GRand Unified Bootloader
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 *  Copyright (C) 2002,2005,2006,2007,2008,2009  Free Software Foundation, Inc.
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 *
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 *  GRUB is free software: you can redistribute it and/or modify
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 *  it under the terms of the GNU General Public License as published by
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 *  the Free Software Foundation, either version 3 of the License, or
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 *  (at your option) any later version.
 *
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 *  GRUB is distributed in the hope that it will be useful,
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 *  but WITHOUT ANY WARRANTY; without even the implied warranty of
 *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 *  GNU General Public License for more details.
 *
 *  You should have received a copy of the GNU General Public License
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 *  along with GRUB.  If not, see <http://www.gnu.org/licenses/>.
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 */

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#ifndef GRUB_KERNEL_HEADER
#define GRUB_KERNEL_HEADER	1
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#include <grub/types.h>
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#include <grub/symbol.h>
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enum
{
  OBJ_TYPE_ELF,
  OBJ_TYPE_MEMDISK,
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  OBJ_TYPE_CONFIG,
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  OBJ_TYPE_PREFIX,
  OBJ_TYPE_PUBKEY
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};

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/* The module header.  */
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struct grub_module_header
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{
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  /* The type of object.  */
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  grub_uint32_t type;
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  /* The size of object (including this header).  */
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  grub_uint32_t size;
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};

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/* "gmim" (GRUB Module Info Magic).  */
#define GRUB_MODULE_MAGIC 0x676d696d
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struct grub_module_info32
{
  /* Magic number so we know we have modules present.  */
  grub_uint32_t magic;
  /* The offset of the modules.  */
  grub_uint32_t offset;
  /* The size of all modules plus this header.  */
  grub_uint32_t size;
};

struct grub_module_info64
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{
  /* Magic number so we know we have modules present.  */
  grub_uint32_t magic;
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  grub_uint32_t padding;
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  /* The offset of the modules.  */
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  grub_uint64_t offset;
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  /* The size of all modules plus this header.  */
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  grub_uint64_t size;
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};
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#ifndef GRUB_UTIL
/* Space isn't reusable on some platforms.  */
/* On Qemu the preload space is readonly.  */
/* On emu there is no preload space.  */
/* On ieee1275 our code assumes that heap is p=v which isn't guaranteed for module space.  */
#if defined (GRUB_MACHINE_QEMU) || defined (GRUB_MACHINE_EMU) \
  || defined (GRUB_MACHINE_EFI) \
  || (defined (GRUB_MACHINE_IEEE1275) && !defined (__sparc__))
#define GRUB_KERNEL_PRELOAD_SPACE_REUSABLE 0
#endif

#if defined (GRUB_MACHINE_PCBIOS) || defined (GRUB_MACHINE_COREBOOT) \
  || defined (GRUB_MACHINE_MULTIBOOT) || defined (GRUB_MACHINE_MIPS_QEMU_MIPS) \
  || defined (GRUB_MACHINE_MIPS_LOONGSON) || defined (GRUB_MACHINE_ARC) \
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  || (defined (__sparc__) && defined (GRUB_MACHINE_IEEE1275)) || defined (GRUB_MACHINE_UBOOT) || defined (GRUB_MACHINE_XEN)
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/* FIXME: stack is between 2 heap regions. Move it.  */
#define GRUB_KERNEL_PRELOAD_SPACE_REUSABLE 1
#endif

#ifndef GRUB_KERNEL_PRELOAD_SPACE_REUSABLE
#error "Please check if preload space is reusable on this platform!"
#endif

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#if GRUB_TARGET_SIZEOF_VOID_P == 8
#define grub_module_info grub_module_info64
#else
#define grub_module_info grub_module_info32
#endif

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extern grub_addr_t EXPORT_VAR (grub_modbase);

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#define FOR_MODULES(var)  for (\
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  var = (grub_modbase && ((((struct grub_module_info *) grub_modbase)->magic) == GRUB_MODULE_MAGIC)) ? (struct grub_module_header *) \
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    (grub_modbase + (((struct grub_module_info *) grub_modbase)->offset)) : 0;\
  var && (grub_addr_t) var \
    < (grub_modbase + (((struct grub_module_info *) grub_modbase)->size));    \
  var = (struct grub_module_header *)					\
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    (((grub_uint32_t *) var) + ((((struct grub_module_header *) var)->size + sizeof (grub_addr_t) - 1) / sizeof (grub_addr_t)) * (sizeof (grub_addr_t) / sizeof (grub_uint32_t))))
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grub_addr_t grub_modules_get_end (void);

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#endif

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/* The start point of the C code.  */
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void grub_main (void) __attribute__ ((noreturn));
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/* The machine-specific initialization. This must initialize memory.  */
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void grub_machine_init (void);
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/* The machine-specific finalization.  */
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void EXPORT_FUNC(grub_machine_fini) (int flags);
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/* The machine-specific prefix initialization.  */
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void
grub_machine_get_bootlocation (char **device, char **path);
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/* Register all the exported symbols. This is automatically generated.  */
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void grub_register_exported_symbols (void);
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extern void (*EXPORT_VAR(grub_net_poll_cards_idle)) (void);

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#endif /* ! GRUB_KERNEL_HEADER */