merge mainline into hints

2010-09-13 02:22:10 +02:00 · 2010-09-13 02:22:10 +02:00 · a848c54e34
commit a848c54e34
parent 7b74857658 d547dc281c
933 changed files with 126865 additions and 40868 deletions
--- a/grub-core/kern/i386/coreboot/init.c
+++ b/grub-core/kern/i386/coreboot/init.c
@ -0,0 +1,129 @@
+/*
+ *  GRUB  --  GRand Unified Bootloader
+ *  Copyright (C) 2002,2003,2004,2005,2006,2007,2008,2009  Free Software Foundation, Inc.
+ *
+ *  GRUB is free software: you can redistribute it and/or modify
+ *  it under the terms of the GNU General Public License as published by
+ *  the Free Software Foundation, either version 3 of the License, or
+ *  (at your option) any later version.
+ *
+ *  GRUB is distributed in the hope that it will be useful,
+ *  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
+ *  along with GRUB.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#include <grub/kernel.h>
+#include <grub/mm.h>
+#include <grub/machine/time.h>
+#include <grub/machine/memory.h>
+#include <grub/machine/console.h>
+#include <grub/types.h>
+#include <grub/err.h>
+#include <grub/dl.h>
+#include <grub/misc.h>
+#include <grub/loader.h>
+#include <grub/env.h>
+#include <grub/cache.h>
+#include <grub/time.h>
+#include <grub/symbol.h>
+#include <grub/cpu/io.h>
+#include <grub/cpu/floppy.h>
+#include <grub/cpu/tsc.h>
+#ifdef GRUB_MACHINE_QEMU
+#include <grub/machine/kernel.h>
+#endif
+
+extern char _start[];
+extern char _end[];
+
+grub_uint32_t
+grub_get_rtc (void)
+{
+  grub_fatal ("grub_get_rtc() is not implemented.\n");
+}
+
+void
+grub_exit (void)
+{
+  /* We can't use grub_fatal() in this function.  This would create an infinite
+     loop, since grub_fatal() calls grub_abort() which in turn calls grub_exit().  */
+  while (1)
+    grub_cpu_idle ();
+}
+
+void
+grub_machine_init (void)
+{
+#ifdef GRUB_MACHINE_QEMU
+  grub_qemu_init_cirrus ();
+#endif
+  /* Initialize the console as early as possible.  */
+  grub_vga_text_init ();
+
+  auto int NESTED_FUNC_ATTR heap_init (grub_uint64_t, grub_uint64_t, grub_uint32_t);
+  int NESTED_FUNC_ATTR heap_init (grub_uint64_t addr, grub_uint64_t size, grub_uint32_t type)
+  {
+#if GRUB_CPU_SIZEOF_VOID_P == 4
+    /* Restrict ourselves to 32-bit memory space.  */
+    if (addr > GRUB_ULONG_MAX)
+      return 0;
+    if (addr + size > GRUB_ULONG_MAX)
+      size = GRUB_ULONG_MAX - addr;
+#endif
+
+    if (type != GRUB_MACHINE_MEMORY_AVAILABLE)
+      return 0;
+
+    /* Avoid the lower memory.  */
+    if (addr < GRUB_MEMORY_MACHINE_LOWER_SIZE)
+      {
+	if (addr + size <= GRUB_MEMORY_MACHINE_LOWER_SIZE)
+	  return 0;
+	else
+	  {
+	    size -= GRUB_MEMORY_MACHINE_LOWER_SIZE - addr;
+	    addr = GRUB_MEMORY_MACHINE_LOWER_SIZE;
+	  }
+      }
+
+    grub_mm_init_region ((void *) (grub_addr_t) addr, (grub_size_t) size);
+
+    return 0;
+  }
+
+#if defined (GRUB_MACHINE_MULTIBOOT) || defined (GRUB_MACHINE_QEMU)
+  grub_machine_mmap_init ();
+#endif
+  grub_machine_mmap_iterate (heap_init);
+
+  grub_tsc_init ();
+}
+
+void
+grub_machine_set_prefix (void)
+{
+  /* Initialize the prefix.  */
+  grub_env_set ("prefix", grub_prefix);
+}
+
+void
+grub_machine_fini (void)
+{
+  grub_vga_text_fini ();
+  grub_stop_floppy ();
+}
+
+/* Return the end of the core image.  */
+grub_addr_t
+grub_arch_modules_addr (void)
+{
+#ifdef GRUB_MACHINE_QEMU
+  return grub_core_entry_addr + grub_kernel_image_size;
+#else
+  return ALIGN_UP((grub_addr_t) _end, GRUB_KERNEL_MACHINE_MOD_ALIGN);
+#endif
+}
--- a/grub-core/kern/i386/coreboot/mmap.c
+++ b/grub-core/kern/i386/coreboot/mmap.c
@ -0,0 +1,107 @@
+/*
+ *  GRUB  --  GRand Unified Bootloader
+ *  Copyright (C) 2007,2008  Free Software Foundation, Inc.
+ *
+ *  GRUB is free software: you can redistribute it and/or modify
+ *  it under the terms of the GNU General Public License as published by
+ *  the Free Software Foundation, either version 3 of the License, or
+ *  (at your option) any later version.
+ *
+ *  GRUB is distributed in the hope that it will be useful,
+ *  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
+ *  along with GRUB.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#include <grub/machine/memory.h>
+#include <grub/types.h>
+#include <grub/err.h>
+#include <grub/misc.h>
+
+static grub_err_t
+grub_linuxbios_table_iterate (int (*hook) (grub_linuxbios_table_item_t))
+{
+  grub_linuxbios_table_header_t table_header;
+  grub_linuxbios_table_item_t table_item;
+
+  auto int check_signature (grub_linuxbios_table_header_t);
+  int check_signature (grub_linuxbios_table_header_t tbl_header)
+  {
+    if (! grub_memcmp (tbl_header->signature, "LBIO", 4))
+      return 1;
+
+    return 0;
+  }
+
+  /* Assuming table_header is aligned to its size (8 bytes).  */
+
+  for (table_header = (grub_linuxbios_table_header_t) 0x500;
+       table_header < (grub_linuxbios_table_header_t) 0x1000; table_header++)
+    if (check_signature (table_header))
+      goto signature_found;
+
+  for (table_header = (grub_linuxbios_table_header_t) 0xf0000;
+       table_header < (grub_linuxbios_table_header_t) 0x100000; table_header++)
+    if (check_signature (table_header))
+      goto signature_found;
+
+  grub_fatal ("Could not find coreboot table\n");
+
+signature_found:
+
+  table_item =
+    (grub_linuxbios_table_item_t) ((long) table_header +
+			       (long) table_header->size);
+  for (; table_item->size;
+       table_item = (grub_linuxbios_table_item_t) ((long) table_item + (long) table_item->size))
+    {
+      if (table_item->tag == GRUB_LINUXBIOS_MEMBER_LINK
+         && check_signature ((grub_linuxbios_table_header_t) (grub_addr_t)
+                             *(grub_uint64_t *) (table_item + 1)))
+       {
+         table_header = (grub_linuxbios_table_header_t) (grub_addr_t)
+           *(grub_uint64_t *) (table_item + 1);
+         goto signature_found;   
+       }
+      if (hook (table_item))
+       return 1;
+    }
+
+  return 0;
+}
+
+grub_err_t
+grub_machine_mmap_iterate (int NESTED_FUNC_ATTR (*hook) (grub_uint64_t, grub_uint64_t, grub_uint32_t))
+{
+  mem_region_t mem_region;
+
+  auto int iterate_linuxbios_table (grub_linuxbios_table_item_t);
+  int iterate_linuxbios_table (grub_linuxbios_table_item_t table_item)
+  {
+    if (table_item->tag != GRUB_LINUXBIOS_MEMBER_MEMORY)
+      return 0;
+
+    mem_region =
+      (mem_region_t) ((long) table_item +
+				 sizeof (struct grub_linuxbios_table_item));
+    while ((long) mem_region < (long) table_item + (long) table_item->size)
+      {
+	if (hook (mem_region->addr, mem_region->size,
+		  /* Multiboot mmaps match with the coreboot mmap definition.
+		     Therefore, we can just pass type through.  */
+		  mem_region->type))
+	  return 1;
+
+	mem_region++;
+      }
+
+    return 0;
+  }
+
+  grub_linuxbios_table_iterate (iterate_linuxbios_table);
+
+  return 0;
+}
--- a/grub-core/kern/i386/coreboot/startup.S
+++ b/grub-core/kern/i386/coreboot/startup.S
@ -0,0 +1,87 @@
+/*
+ *  GRUB  --  GRand Unified Bootloader
+ *  Copyright (C) 1999,2000,2001,2002,2003,2005,2006,2007,2008 Free Software Foundation, Inc.
+ *
+ *  GRUB is free software: you can redistribute it and/or modify
+ *  it under the terms of the GNU General Public License as published by
+ *  the Free Software Foundation, either version 3 of the License, or
+ *  (at your option) any later version.
+ *
+ *  GRUB is distributed in the hope that it will be useful,
+ *  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
+ *  along with GRUB.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#include <grub/symbol.h>
+#include <grub/machine/memory.h>
+#include <grub/cpu/linux.h>
+#include <grub/offsets.h>
+#include <multiboot.h>
+#include <multiboot2.h>
+
+/*
+ * Note: GRUB is compiled with the options -mrtd and -mregparm=3.
+ *       So the first three arguments are passed in %eax, %edx, and %ecx,
+ *       respectively, and if a function has a fixed number of arguments
+ *       and the number if greater than three, the function must return
+ *       with "ret $N" where N is ((the number of arguments) - 3) * 4.
+ */
+
+	.file	"startup.S"
+	.text
+	.globl	start, _start
+start:
+_start:
+	jmp codestart
+
+	/*
+	 *  This is a special data area at a fixed offset from the beginning.
+	 */
+
+	. = _start + GRUB_KERNEL_MACHINE_PREFIX
+
+VARIABLE(grub_prefix)
+	/* to be filled by grub-mkimage */
+
+	/*
+	 *  Leave some breathing room for the prefix.
+	 */
+
+	. = _start + GRUB_KERNEL_MACHINE_PREFIX_END
+
+/*
+ *  Support for booting GRUB from a Multiboot boot loader (e.g. GRUB itself).
+ */
+	.p2align	2	/* force 4-byte alignment */
+multiboot_header:
+	/* magic */
+	.long	0x1BADB002
+	/* flags */
+	.long	MULTIBOOT_MEMORY_INFO
+	/* checksum */
+	.long	-0x1BADB002 - MULTIBOOT_MEMORY_INFO
+
+codestart:
+#ifdef GRUB_MACHINE_MULTIBOOT
+	cmpl	$MULTIBOOT_BOOTLOADER_MAGIC, %eax
+	jne 0f
+	movl	%ebx, EXT_C(startup_multiboot_info)
+0:
+#endif
+
+	/* initialize the stack */
+	movl $GRUB_MEMORY_MACHINE_PROT_STACK, %esp
+
+	/* jump to the main body of C code */
+	jmp EXT_C(grub_main)
+
+/*
+ *  prot_to_real and associated structures (but NOT real_to_prot, that is
+ *  only needed for BIOS gates).
+ */
+#include "../realmode.S"
+
--- a/grub-core/kern/i386/dl.c
+++ b/grub-core/kern/i386/dl.c
@ -0,0 +1,109 @@
+/* dl-386.c - arch-dependent part of loadable module support */
+/*
+ *  GRUB  --  GRand Unified Bootloader
+ *  Copyright (C) 2002,2005,2007,2009  Free Software Foundation, Inc.
+ *
+ *  GRUB is free software: you can redistribute it and/or modify
+ *  it under the terms of the GNU General Public License as published by
+ *  the Free Software Foundation, either version 3 of the License, or
+ *  (at your option) any later version.
+ *
+ *  GRUB is distributed in the hope that it will be useful,
+ *  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
+ *  along with GRUB.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#include <grub/dl.h>
+#include <grub/elf.h>
+#include <grub/misc.h>
+#include <grub/err.h>
+
+/* Check if EHDR is a valid ELF header.  */
+grub_err_t
+grub_arch_dl_check_header (void *ehdr)
+{
+  Elf_Ehdr *e = ehdr;
+
+  /* Check the magic numbers.  */
+  if (e->e_ident[EI_CLASS] != ELFCLASS32
+      || e->e_ident[EI_DATA] != ELFDATA2LSB
+      || e->e_machine != EM_386)
+    return grub_error (GRUB_ERR_BAD_OS, "invalid arch specific ELF magic");
+
+  return GRUB_ERR_NONE;
+}
+
+/* Relocate symbols.  */
+grub_err_t
+grub_arch_dl_relocate_symbols (grub_dl_t mod, void *ehdr)
+{
+  Elf_Ehdr *e = ehdr;
+  Elf_Shdr *s;
+  Elf_Word entsize;
+  unsigned i;
+
+  /* Find a symbol table.  */
+  for (i = 0, s = (Elf_Shdr *) ((char *) e + e->e_shoff);
+       i < e->e_shnum;
+       i++, s = (Elf_Shdr *) ((char *) s + e->e_shentsize))
+    if (s->sh_type == SHT_SYMTAB)
+      break;
+
+  if (i == e->e_shnum)
+    return grub_error (GRUB_ERR_BAD_MODULE, "no symtab found");
+
+  entsize = s->sh_entsize;
+
+  for (i = 0, s = (Elf_Shdr *) ((char *) e + e->e_shoff);
+       i < e->e_shnum;
+       i++, s = (Elf_Shdr *) ((char *) s + e->e_shentsize))
+    if (s->sh_type == SHT_REL)
+      {
+	grub_dl_segment_t seg;
+
+	/* Find the target segment.  */
+	for (seg = mod->segment; seg; seg = seg->next)
+	  if (seg->section == s->sh_info)
+	    break;
+
+	if (seg)
+	  {
+	    Elf_Rel *rel, *max;
+
+	    for (rel = (Elf_Rel *) ((char *) e + s->sh_offset),
+		   max = rel + s->sh_size / s->sh_entsize;
+		 rel < max;
+		 rel++)
+	      {
+		Elf_Word *addr;
+		Elf_Sym *sym;
+
+		if (seg->size < rel->r_offset)
+		  return grub_error (GRUB_ERR_BAD_MODULE,
+				     "reloc offset is out of the segment");
+
+		addr = (Elf_Word *) ((char *) seg->addr + rel->r_offset);
+		sym = (Elf_Sym *) ((char *) mod->symtab
+				     + entsize * ELF_R_SYM (rel->r_info));
+
+		switch (ELF_R_TYPE (rel->r_info))
+		  {
+		  case R_386_32:
+		    *addr += sym->st_value;
+		    break;
+
+		  case R_386_PC32:
+		    *addr += (sym->st_value - (Elf_Word) seg->addr
+			      - rel->r_offset);
+		    break;
+		  }
+	      }
+	  }
+      }
+
+  return GRUB_ERR_NONE;
+}
--- a/grub-core/kern/i386/efi/init.c
+++ b/grub-core/kern/i386/efi/init.c
@ -0,0 +1,47 @@
+/* init.c - initialize an x86-based EFI system */
+/*
+ *  GRUB  --  GRand Unified Bootloader
+ *  Copyright (C) 2006,2007  Free Software Foundation, Inc.
+ *
+ *  GRUB is free software: you can redistribute it and/or modify
+ *  it under the terms of the GNU General Public License as published by
+ *  the Free Software Foundation, either version 3 of the License, or
+ *  (at your option) any later version.
+ *
+ *  GRUB is distributed in the hope that it will be useful,
+ *  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
+ *  along with GRUB.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#include <grub/types.h>
+#include <grub/misc.h>
+#include <grub/mm.h>
+#include <grub/err.h>
+#include <grub/dl.h>
+#include <grub/cache.h>
+#include <grub/kernel.h>
+#include <grub/efi/efi.h>
+#include <grub/i386/tsc.h>
+
+void
+grub_machine_init (void)
+{
+  grub_efi_init ();
+  grub_tsc_init ();
+}
+
+void
+grub_machine_fini (void)
+{
+  grub_efi_fini ();
+}
+
+void
+grub_machine_set_prefix (void)
+{
+  grub_efi_set_prefix ();
+}
--- a/grub-core/kern/i386/efi/startup.S
+++ b/grub-core/kern/i386/efi/startup.S
@ -0,0 +1,66 @@
+/* startup.S - bootstrap GRUB itself */
+/*
+ *  GRUB  --  GRand Unified Bootloader
+ *  Copyright (C) 2006,2007,2010  Free Software Foundation, Inc.
+ *
+ *  GRUB is free software: you can redistribute it and/or modify
+ *  it under the terms of the GNU General Public License as published by
+ *  the Free Software Foundation, either version 3 of the License, or
+ *  (at your option) any later version.
+ *
+ *  GRUB is distributed in the hope that it will be useful,
+ *  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
+ *  along with GRUB.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#include <config.h>
+#include <grub/symbol.h>
+#include <grub/boot.h>
+
+        .file   "startup.S"
+        .text
+        .globl  start, _start
+start:
+_start:
+	jmp codestart
+
+        /*
+         *  Compatibility version number
+         *
+         *  These MUST be at byte offset 6 and 7 of the executable
+         *  DO NOT MOVE !!!
+         */
+        . = _start + 0x6
+        .byte   GRUB_BOOT_VERSION_MAJOR, GRUB_BOOT_VERSION_MINOR
+
+        /*
+         *  This is a special data area 8 bytes from the beginning.
+         */
+
+        . = _start + 0x8
+
+VARIABLE(grub_prefix)
+	/* to be filled by grub-mkimage */
+
+        /*
+         *  Leave some breathing room for the prefix.
+         */
+
+        . = _start + 0x50
+
+codestart:
+	/*
+	 *  EFI_SYSTEM_TABLE * and EFI_HANDLE are passed on the stack.
+	 */
+	movl	4(%esp), %eax
+	movl	%eax, EXT_C(grub_efi_image_handle)
+	movl	8(%esp), %eax
+	movl	%eax, EXT_C(grub_efi_system_table)
+	call	EXT_C(grub_main)
+	ret
+
+#include "../realmode.S"
--- a/grub-core/kern/i386/ieee1275/init.c
+++ b/grub-core/kern/i386/ieee1275/init.c
@ -0,0 +1,34 @@
+/*  init.c -- Initialize GRUB on Open Firmware.  */
+/*
+ *  GRUB  --  GRand Unified Bootloader
+ *  Copyright (C) 2003,2004,2005,2007,2008 Free Software Foundation, Inc.
+ *
+ *  GRUB is free software: you can redistribute it and/or modify
+ *  it under the terms of the GNU General Public License as published by
+ *  the Free Software Foundation, either version 3 of the License, or
+ *  (at your option) any later version.
+ *
+ *  GRUB is distributed in the hope that it will be useful,
+ *  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
+ *  along with GRUB.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#include <grub/types.h>
+#include <grub/cache.h>
+
+void grub_stop_floppy (void);
+
+void
+grub_stop_floppy (void)
+{
+}
+
+void
+grub_arch_sync_caches (void *address __attribute__ ((unused)),
+		       grub_size_t len __attribute__ ((unused)))
+{
+}
--- a/grub-core/kern/i386/ieee1275/startup.S
+++ b/grub-core/kern/i386/ieee1275/startup.S
@ -0,0 +1,65 @@
+/*
+ *  GRUB  --  GRand Unified Bootloader
+ *  Copyright (C) 1999,2000,2001,2002,2003,2005,2006,2007,2008 Free Software Foundation, Inc.
+ *
+ *  GRUB is free software: you can redistribute it and/or modify
+ *  it under the terms of the GNU General Public License as published by
+ *  the Free Software Foundation, either version 3 of the License, or
+ *  (at your option) any later version.
+ *
+ *  GRUB is distributed in the hope that it will be useful,
+ *  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
+ *  along with GRUB.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#include <grub/symbol.h>
+#include <grub/machine/memory.h>
+#include <grub/cpu/linux.h>
+#include <multiboot.h>
+#include <multiboot2.h>
+
+/*
+ * Note: GRUB is compiled with the options -mrtd and -mregparm=3.
+ *       So the first three arguments are passed in %eax, %edx, and %ecx,
+ *       respectively, and if a function has a fixed number of arguments
+ *       and the number if greater than three, the function must return
+ *       with "ret $N" where N is ((the number of arguments) - 3) * 4.
+ */
+
+	.file	"startup.S"
+	.text
+	.globl	start, _start
+
+start:
+_start:
+	jmp codestart
+
+	/*
+	 *  This is a special data area at a fixed offset from the beginning.
+	 */
+
+	. = _start + GRUB_KERNEL_MACHINE_PREFIX
+
+VARIABLE(grub_prefix)
+	/* to be filled by grub-mkimage */
+
+	/*
+	 *  Leave some breathing room for the prefix.
+	 */
+
+	. = _start + GRUB_KERNEL_MACHINE_PREFIX_END
+
+codestart:
+	movl %eax, EXT_C(grub_ieee1275_entry_fn)
+	jmp EXT_C(grub_main)
+
+/*
+ *  prot_to_real and associated structures (but NOT real_to_prot, that is
+ *  only needed for BIOS gates).
+ */
+#include "../realmode.S"
+
--- a/grub-core/kern/i386/loader.S
+++ b/grub-core/kern/i386/loader.S
@ -0,0 +1,120 @@
+/*
+ *  GRUB  --  GRand Unified Bootloader
+ *  Copyright (C) 1999,2000,2001,2002,2003,2005,2006,2007,2008 Free Software Foundation, Inc.
+ *
+ *  GRUB is free software: you can redistribute it and/or modify
+ *  it under the terms of the GNU General Public License as published by
+ *  the Free Software Foundation, either version 3 of the License, or
+ *  (at your option) any later version.
+ *
+ *  GRUB is distributed in the hope that it will be useful,
+ *  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
+ *  along with GRUB.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+
+/*
+ * Note: These functions defined in this file may be called from C.
+ *       Be careful of that you must not modify some registers. Quote
+ *       from gcc-2.95.2/gcc/config/i386/i386.h:
+
+   1 for registers not available across function calls.
+   These must include the FIXED_REGISTERS and also any
+   registers that can be used without being saved.
+   The latter must include the registers where values are returned
+   and the register where structure-value addresses are passed.
+   Aside from that, you can include as many other registers as you like.
+
+  ax,dx,cx,bx,si,di,bp,sp,st,st1,st2,st3,st4,st5,st6,st7,arg
+{  1, 1, 1, 0, 0, 0, 0, 1, 1,  1,  1,  1,  1,  1,  1,  1,  1 }
+ */
+
+/*
+ * Note: GRUB is compiled with the options -mrtd and -mregparm=3.
+ *       So the first three arguments are passed in %eax, %edx, and %ecx,
+ *       respectively, and if a function has a fixed number of arguments
+ *       and the number if greater than three, the function must return
+ *       with "ret $N" where N is ((the number of arguments) - 3) * 4.
+ */
+
+/*
+ *  This is the area for all of the special variables.
+ */
+
+	.p2align	2	/* force 4-byte alignment */
+
+/*
+ * void grub_linux_boot_zimage (void)
+ */
+VARIABLE(grub_linux_prot_size)
+	.long	0
+VARIABLE(grub_linux_tmp_addr)
+	.long	0
+VARIABLE(grub_linux_real_addr)
+	.long	0
+VARIABLE(grub_linux_is_bzimage)
+	.long	0
+
+FUNCTION(grub_linux16_boot)
+	/* Must be done before zImage copy.  */
+	call	EXT_C(grub_dl_unload_all)
+
+	movl	EXT_C(grub_linux_is_bzimage), %ebx
+	test	%ebx, %ebx
+	jne bzimage
+
+	/* copy the kernel */
+	movl	EXT_C(grub_linux_prot_size), %ecx
+	addl	$3, %ecx
+	shrl	$2, %ecx
+	movl	$GRUB_LINUX_BZIMAGE_ADDR, %esi
+	movl	$GRUB_LINUX_ZIMAGE_ADDR, %edi
+	cld
+	rep
+	movsl
+
+bzimage:
+	movl	EXT_C(grub_linux_real_addr), %ebx
+
+	/* copy the real mode code */
+	movl	EXT_C(grub_linux_tmp_addr), %esi
+	movl	%ebx, %edi
+	movl	$GRUB_LINUX_SETUP_MOVE_SIZE, %ecx
+	cld
+	rep
+	movsb
+
+	/* change %ebx to the segment address */
+	shrl	$4, %ebx
+	movl	%ebx, %eax
+	addl	$0x20, %eax
+	movw	%ax, linux_setup_seg
+
+	/* XXX new stack pointer in safe area for calling functions */
+	movl	$0x4000, %esp
+	call	EXT_C(grub_stop_floppy)
+
+	/* final setup for linux boot */
+	call	prot_to_real
+	.code16
+
+	cli
+	movw	%bx, %ss
+	movw	$GRUB_LINUX_SETUP_STACK, %sp
+
+	movw	%bx, %ds
+	movw	%bx, %es
+	movw	%bx, %fs
+	movw	%bx, %gs
+
+	/* ljmp */
+	.byte	0xea
+	.word	0
+linux_setup_seg:
+	.word	0
+	.code32
+
--- a/grub-core/kern/i386/misc.S
+++ b/grub-core/kern/i386/misc.S
@ -0,0 +1,29 @@
+/*
+ *  GRUB  --  GRand Unified Bootloader
+ *  Copyright (C) 1999,2000,2001,2002,2003,2005,2006,2007,2008 Free Software Foundation, Inc.
+ *
+ *  GRUB is free software: you can redistribute it and/or modify
+ *  it under the terms of the GNU General Public License as published by
+ *  the Free Software Foundation, either version 3 of the License, or
+ *  (at your option) any later version.
+ *
+ *  GRUB is distributed in the hope that it will be useful,
+ *  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
+ *  along with GRUB.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#include <grub/symbol.h>
+
+	.text
+/*
+ *  This call is special...  it never returns...  in fact it should simply
+ *  hang at this point!
+ */
+FUNCTION(grub_stop)
+	cli
+1:	hlt
+	jmp	1b
--- a/grub-core/kern/i386/multiboot_mmap.c
+++ b/grub-core/kern/i386/multiboot_mmap.c
@ -0,0 +1,86 @@
+/*
+ *  GRUB  --  GRand Unified Bootloader
+ *  Copyright (C) 2002,2003,2004,2005,2006,2007,2008,2009  Free Software Foundation, Inc.
+ *
+ *  GRUB is free software: you can redistribute it and/or modify
+ *  it under the terms of the GNU General Public License as published by
+ *  the Free Software Foundation, either version 3 of the License, or
+ *  (at your option) any later version.
+ *
+ *  GRUB is distributed in the hope that it will be useful,
+ *  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
+ *  along with GRUB.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#include <grub/machine/memory.h>
+#include <grub/types.h>
+#include <grub/multiboot.h>
+#include <grub/err.h>
+#include <grub/misc.h>
+
+grub_size_t grub_lower_mem, grub_upper_mem;
+
+/* A pointer to the MBI in its initial location.  */
+struct multiboot_info *startup_multiboot_info;
+
+/* The MBI has to be copied to our BSS so that it won't be
+   overwritten.  This is its final location.  */
+static struct multiboot_info kern_multiboot_info;
+
+/* Unfortunately we can't use heap at this point.  But 32 looks like a sane
+   limit (used by memtest86).  */
+static grub_uint8_t mmap_entries[sizeof (struct multiboot_mmap_entry) * 32];
+
+void
+grub_machine_mmap_init ()
+{
+  if (! startup_multiboot_info)
+    grub_fatal ("Unable to find Multiboot Information (is CONFIG_MULTIBOOT disabled in coreboot?)");
+
+  /* Move MBI to a safe place.  */
+  grub_memmove (&kern_multiboot_info, startup_multiboot_info, sizeof (struct multiboot_info));
+
+  if ((kern_multiboot_info.flags & MULTIBOOT_INFO_MEM_MAP) == 0)
+    grub_fatal ("Missing Multiboot memory information");
+
+  /* Move the memory map to a safe place.  */
+  if (kern_multiboot_info.mmap_length > sizeof (mmap_entries))
+    {
+      grub_printf ("WARNING: Memory map size exceeds limit (0x%x > 0x%x); it will be truncated\n",
+		   kern_multiboot_info.mmap_length, sizeof (mmap_entries));
+      kern_multiboot_info.mmap_length = sizeof (mmap_entries);
+    }
+  grub_memmove (mmap_entries, (void *) kern_multiboot_info.mmap_addr, kern_multiboot_info.mmap_length);
+  kern_multiboot_info.mmap_addr = (grub_uint32_t) mmap_entries;
+
+  if ((kern_multiboot_info.flags & MULTIBOOT_INFO_MEMORY) == 0)
+    {
+      grub_lower_mem = GRUB_MEMORY_MACHINE_LOWER_USABLE;
+      grub_upper_mem = 0;
+    }
+  else
+    {
+      grub_lower_mem = kern_multiboot_info.mem_lower * 1024;
+      grub_upper_mem = kern_multiboot_info.mem_upper * 1024;
+    }
+}
+
+grub_err_t
+grub_machine_mmap_iterate (int NESTED_FUNC_ATTR (*hook) (grub_uint64_t, grub_uint64_t, grub_uint32_t))
+{
+  struct multiboot_mmap_entry *entry = (void *) kern_multiboot_info.mmap_addr;
+
+  while ((unsigned long) entry < kern_multiboot_info.mmap_addr + kern_multiboot_info.mmap_length)
+    {
+      if (hook (entry->addr, entry->len, entry->type))
+	break;
+
+      entry = (void *) ((grub_addr_t) entry + entry->size + sizeof (entry->size));
+    }
+
+  return 0;
+}
--- a/grub-core/kern/i386/pc/init.c
+++ b/grub-core/kern/i386/pc/init.c
@ -0,0 +1,246 @@
+/*
+ *  GRUB  --  GRand Unified Bootloader
+ *  Copyright (C) 2002,2003,2004,2005,2006,2007,2008,2009,2010  Free Software Foundation, Inc.
+ *
+ *  GRUB is free software: you can redistribute it and/or modify
+ *  it under the terms of the GNU General Public License as published by
+ *  the Free Software Foundation, either version 3 of the License, or
+ *  (at your option) any later version.
+ *
+ *  GRUB is distributed in the hope that it will be useful,
+ *  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
+ *  along with GRUB.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#include <grub/kernel.h>
+#include <grub/mm.h>
+#include <grub/machine/boot.h>
+#include <grub/machine/init.h>
+#include <grub/machine/memory.h>
+#include <grub/machine/console.h>
+#include <grub/machine/kernel.h>
+#include <grub/machine/int.h>
+#include <grub/types.h>
+#include <grub/err.h>
+#include <grub/dl.h>
+#include <grub/misc.h>
+#include <grub/loader.h>
+#include <grub/env.h>
+#include <grub/cache.h>
+#include <grub/time.h>
+#include <grub/cpu/tsc.h>
+
+struct mem_region
+{
+  grub_addr_t addr;
+  grub_size_t size;
+};
+
+#define MAX_REGIONS	32
+
+static struct mem_region mem_regions[MAX_REGIONS];
+static int num_regions;
+
+static char *
+make_install_device (void)
+{
+  /* XXX: This should be enough.  */
+  char dev[100], *ptr = dev;
+
+  if (grub_prefix[0] != '(')
+    {
+      /* No hardcoded root partition - make it from the boot drive and the
+	 partition number encoded at the install time.  */
+      if (grub_boot_drive == GRUB_BOOT_MACHINE_PXE_DL)
+	{
+	  grub_strcpy (dev, "(pxe");
+	  ptr += sizeof ("(pxe") - 1;
+	}
+      else
+	{
+	  grub_snprintf (dev, sizeof (dev),
+			 "(%cd%u", (grub_boot_drive & 0x80) ? 'h' : 'f',
+			 grub_boot_drive & 0x7f);
+	  ptr += grub_strlen (ptr);
+
+	  if (grub_install_dos_part >= 0)
+	    grub_snprintf (ptr, sizeof (dev) - (ptr - dev),
+			   ",%u", grub_install_dos_part + 1);
+	  ptr += grub_strlen (ptr);
+
+	  if (grub_install_bsd_part >= 0)
+	    grub_snprintf (ptr, sizeof (dev) - (ptr - dev), ",%u",
+			   grub_install_bsd_part + 1);
+	  ptr += grub_strlen (ptr);
+	}
+
+      grub_snprintf (ptr, sizeof (dev) - (ptr - dev), ")%s", grub_prefix);
+      grub_strcpy (grub_prefix, dev);
+    }
+  else if (grub_prefix[1] == ',' || grub_prefix[1] == ')')
+    {
+      /* We have a prefix, but still need to fill in the boot drive.  */
+      grub_snprintf (dev, sizeof (dev),
+		     "(%cd%u%s", (grub_boot_drive & 0x80) ? 'h' : 'f',
+		     grub_boot_drive & 0x7f, grub_prefix + 1);
+      grub_strcpy (grub_prefix, dev);
+    }
+
+  return grub_prefix;
+}
+
+/* Add a memory region.  */
+static void
+add_mem_region (grub_addr_t addr, grub_size_t size)
+{
+  if (num_regions == MAX_REGIONS)
+    /* Ignore.  */
+    return;
+
+  mem_regions[num_regions].addr = addr;
+  mem_regions[num_regions].size = size;
+  num_regions++;
+}
+
+/* Compact memory regions.  */
+static void
+compact_mem_regions (void)
+{
+  int i, j;
+
+  /* Sort them.  */
+  for (i = 0; i < num_regions - 1; i++)
+    for (j = i + 1; j < num_regions; j++)
+      if (mem_regions[i].addr > mem_regions[j].addr)
+	{
+	  struct mem_region tmp = mem_regions[i];
+	  mem_regions[i] = mem_regions[j];
+	  mem_regions[j] = tmp;
+	}
+
+  /* Merge overlaps.  */
+  for (i = 0; i < num_regions - 1; i++)
+    if (mem_regions[i].addr + mem_regions[i].size >= mem_regions[i + 1].addr)
+      {
+	j = i + 1;
+
+	if (mem_regions[i].addr + mem_regions[i].size
+	    < mem_regions[j].addr + mem_regions[j].size)
+	  mem_regions[i].size = (mem_regions[j].addr + mem_regions[j].size
+				 - mem_regions[i].addr);
+
+	grub_memmove (mem_regions + j, mem_regions + j + 1,
+		      (num_regions - j - 1) * sizeof (struct mem_region));
+	i--;
+        num_regions--;
+      }
+}
+
+/*
+ *
+ * grub_get_conv_memsize(i) :  return the conventional memory size in KB.
+ *	BIOS call "INT 12H" to get conventional memory size
+ *      The return value in AX.
+ */
+static inline grub_uint16_t
+grub_get_conv_memsize (void)
+{
+  struct grub_bios_int_registers regs;
+
+  regs.flags = GRUB_CPU_INT_FLAGS_DEFAULT;
+  grub_bios_interrupt (0x12, &regs);
+  return regs.eax & 0xffff;
+}
+
+void
+grub_machine_init (void)
+{
+  int i;
+  int grub_lower_mem;
+
+  /* Initialize the console as early as possible.  */
+  grub_console_init ();
+
+  grub_lower_mem = grub_get_conv_memsize () << 10;
+
+  /* Sanity check.  */
+  if (grub_lower_mem < GRUB_MEMORY_MACHINE_RESERVED_END)
+    grub_fatal ("too small memory");
+
+#if 0
+  /* Turn on Gate A20 to access >1MB.  */
+  grub_gate_a20 (1);
+#endif
+
+/* FIXME: This prevents loader/i386/linux.c from using low memory.  When our
+   heap implements support for requesting a chunk in low memory, this should
+   no longer be a problem.  */
+#if 0
+  /* Add the lower memory into free memory.  */
+  if (grub_lower_mem >= GRUB_MEMORY_MACHINE_RESERVED_END)
+    add_mem_region (GRUB_MEMORY_MACHINE_RESERVED_END,
+		    grub_lower_mem - GRUB_MEMORY_MACHINE_RESERVED_END);
+#endif
+
+  auto int NESTED_FUNC_ATTR hook (grub_uint64_t, grub_uint64_t, grub_uint32_t);
+  int NESTED_FUNC_ATTR hook (grub_uint64_t addr, grub_uint64_t size, grub_uint32_t type)
+    {
+      /* Avoid the lower memory.  */
+      if (addr < 0x100000)
+	{
+	  if (size <= 0x100000 - addr)
+	    return 0;
+
+	  size -= 0x100000 - addr;
+	  addr = 0x100000;
+	}
+
+      /* Ignore >4GB.  */
+      if (addr <= 0xFFFFFFFF && type == GRUB_MACHINE_MEMORY_AVAILABLE)
+	{
+	  grub_size_t len;
+
+	  len = (grub_size_t) ((addr + size > 0xFFFFFFFF)
+		 ? 0xFFFFFFFF - addr
+		 : size);
+	  add_mem_region (addr, len);
+	}
+
+      return 0;
+    }
+
+  grub_machine_mmap_iterate (hook);
+
+  compact_mem_regions ();
+
+  for (i = 0; i < num_regions; i++)
+      grub_mm_init_region ((void *) mem_regions[i].addr, mem_regions[i].size);
+
+  grub_tsc_init ();
+}
+
+void
+grub_machine_set_prefix (void)
+{
+  /* Initialize the prefix.  */
+  grub_env_set ("prefix", make_install_device ());
+}
+
+void
+grub_machine_fini (void)
+{
+  grub_console_fini ();
+  grub_stop_floppy ();
+}
+
+/* Return the end of the core image.  */
+grub_addr_t
+grub_arch_modules_addr (void)
+{
+  return GRUB_MEMORY_MACHINE_DECOMPRESSION_ADDR
+    + (grub_kernel_image_size - GRUB_KERNEL_MACHINE_RAW_SIZE);
+}
--- a/grub-core/kern/i386/pc/lzma_decode.S
+++ b/grub-core/kern/i386/pc/lzma_decode.S
@ -0,0 +1,677 @@
+/*
+ *  GRUB  --  GRand Unified Bootloader
+ *  Copyright (C) 2008  Free Software Foundation, Inc.
+ *
+ *  GRUB is free software: you can redistribute it and/or modify
+ *  it under the terms of the GNU General Public License as published by
+ *  the Free Software Foundation, either version 3 of the License, or
+ *  (at your option) any later version.
+ *
+ *  GRUB is distributed in the hope that it will be useful,
+ *  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
+ *  along with GRUB.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#define FIXED_PROPS
+
+#define LZMA_BASE_SIZE 1846
+#define LZMA_LIT_SIZE 768
+
+#define LZMA_PROPERTIES_SIZE 5
+
+#define kNumTopBits 24
+#define kTopValue (1 << kNumTopBits)
+
+#define kNumBitModelTotalBits 11
+#define kBitModelTotal (1 << kNumBitModelTotalBits)
+#define kNumMoveBits 5
+
+
+#define kNumPosBitsMax 4
+#define kNumPosStatesMax (1 << kNumPosBitsMax)
+
+#define kLenNumLowBits 3
+#define kLenNumLowSymbols (1 << kLenNumLowBits)
+#define kLenNumMidBits 3
+#define kLenNumMidSymbols (1 << kLenNumMidBits)
+#define kLenNumHighBits 8
+#define kLenNumHighSymbols (1 << kLenNumHighBits)
+
+#define LenChoice 0
+#define LenChoice2 (LenChoice + 1)
+#define LenLow (LenChoice2 + 1)
+#define LenMid (LenLow + (kNumPosStatesMax << kLenNumLowBits))
+#define LenHigh (LenMid + (kNumPosStatesMax << kLenNumMidBits))
+#define kNumLenProbs (LenHigh + kLenNumHighSymbols)
+
+
+#define kNumStates 12
+#define kNumLitStates 7
+
+#define kStartPosModelIndex 4
+#define kEndPosModelIndex 14
+#define kNumFullDistances (1 << (kEndPosModelIndex >> 1))
+
+#define kNumPosSlotBits 6
+#define kNumLenToPosStates 4
+
+#define kNumAlignBits 4
+#define kAlignTableSize (1 << kNumAlignBits)
+
+#define kMatchMinLen 2
+
+#define IsMatch 0
+#define IsRep (IsMatch + (kNumStates << kNumPosBitsMax))
+#define IsRepG0 (IsRep + kNumStates)
+#define IsRepG1 (IsRepG0 + kNumStates)
+#define IsRepG2 (IsRepG1 + kNumStates)
+#define IsRep0Long (IsRepG2 + kNumStates)
+#define PosSlot (IsRep0Long + (kNumStates << kNumPosBitsMax))
+#define SpecPos (PosSlot + (kNumLenToPosStates << kNumPosSlotBits))
+#define Align (SpecPos + kNumFullDistances - kEndPosModelIndex)
+#define LenCoder (Align + kAlignTableSize)
+#define RepLenCoder (LenCoder + kNumLenProbs)
+#define Literal (RepLenCoder + kNumLenProbs)
+
+
+#if 0
+
+DbgOut:
+	pushf
+	pushl	%ebp
+	pushl	%edi
+	pushl	%esi
+	pushl	%edx
+	pushl	%ecx
+	pushl	%ebx
+	pushl	%eax
+
+	call	_DebugPrint
+
+	popl	%eax
+	popl	%ebx
+	popl	%ecx
+	popl	%edx
+	popl	%esi
+	popl	%edi
+	popl	%ebp
+	popf
+
+	ret
+
+
+/*
+ * int LzmaDecodeProperties(CLzmaProperties *propsRes,
+ *                          const unsigned char *propsData,
+ *                          int size);
+ */
+
+_LzmaDecodePropertiesA:
+	movb	(%edx), %dl
+
+	xorl	%ecx, %ecx
+1:
+	cmpb	$45, %dl
+	jb	2f
+	incl	%ecx
+	subb	$45, %dl
+	jmp	1b
+2:
+	movl	%ecx, 8(%eax)		/* pb */
+	xorl	%ecx, %ecx
+1:
+	cmpb	$9, %dl
+	jb	2f
+	incl	%ecx
+	subb	$9, %dl
+2:
+	movl	%ecx, 4(%eax)		/* lp */
+	movb	%dl, %cl
+	movl	%ecx, (%eax)		/* lc */
+
+#endif
+
+#ifndef ASM_FILE
+	xorl	%eax, %eax
+#endif
+	ret
+
+#define out_size	8(%ebp)
+
+#define now_pos		-4(%ebp)
+#define prev_byte	-8(%ebp)
+#define range		-12(%ebp)
+#define code		-16(%ebp)
+#define state		-20(%ebp)
+#define rep0		-24(%ebp)
+#define rep1		-28(%ebp)
+#define rep2		-32(%ebp)
+#define rep3		-36(%ebp)
+
+#ifdef FIXED_PROPS
+
+#define FIXED_LC	3
+#define FIXED_LP	0
+#define FIXED_PB	2
+
+#define POS_STATE_MASK	((1 << (FIXED_PB)) - 1)
+#define LIT_POS_MASK	((1 << (FIXED_LP)) - 1)
+
+#define LOCAL_SIZE	36
+
+#else
+
+#define lc		(%ebx)
+#define lp		4(%ebx)
+#define pb		8(%ebx)
+#define probs		12(%ebx)
+
+#define pos_state_mask	-40(%ebp)
+#define lit_pos_mask	-44(%ebp)
+
+#define LOCAL_SIZE	44
+
+#endif
+
+RangeDecoderBitDecode:
+#ifdef FIXED_PROPS
+	leal	(%ebx, %eax, 4), %eax
+#else
+	shll	$2, %eax
+	addl	probs, %eax
+#endif
+
+	movl	%eax, %ecx
+	movl	(%ecx), %eax
+
+	movl	range, %edx
+	shrl	$kNumBitModelTotalBits, %edx
+	mull	%edx
+
+	cmpl	code, %eax
+	jbe	1f
+
+	movl	%eax, range
+	movl	$kBitModelTotal, %edx
+	subl	(%ecx), %edx
+	shrl	$kNumMoveBits, %edx
+	addl	%edx, (%ecx)
+	clc
+3:
+	pushf
+	cmpl	$kTopValue, range
+	jnc	2f
+	shll	$8, code
+	lodsb
+	movb	%al, code
+	shll	$8, range
+2:
+	popf
+	ret
+1:
+	subl	%eax, range
+	subl	%eax, code
+	movl	(%ecx), %edx
+	shrl	$kNumMoveBits, %edx
+	subl	%edx, (%ecx)
+	stc
+	jmp	3b
+
+RangeDecoderBitTreeDecode:
+RangeDecoderReverseBitTreeDecode:
+	movzbl	%cl, %ecx
+	xorl	%edx, %edx
+	pushl	%edx
+	incl	%edx
+	pushl	%edx
+
+1:
+	pushl	%eax
+	pushl	%ecx
+	pushl	%edx
+
+	addl	%edx, %eax
+	call	RangeDecoderBitDecode
+
+	popl	%edx
+	popl	%ecx
+
+	jnc	2f
+	movl	4(%esp), %eax
+	orl	%eax, 8(%esp)
+	stc
+
+2:
+	adcl	%edx, %edx
+	popl	%eax
+
+	shll	$1, (%esp)
+	loop	1b
+
+	popl	%ecx
+	subl	%ecx, %edx		/* RangeDecoderBitTreeDecode */
+	popl	%ecx			/* RangeDecoderReverseBitTreeDecode */
+	ret
+
+LzmaLenDecode:
+	pushl	%eax
+	addl	$LenChoice, %eax
+	call	RangeDecoderBitDecode
+	popl	%eax
+	jc	1f
+	pushl	$0
+	movb	$kLenNumLowBits, %cl
+	addl	$LenLow, %eax
+2:
+	movl	12(%esp), %edx
+	shll	%cl, %edx
+	addl	%edx, %eax
+3:
+
+	call	RangeDecoderBitTreeDecode
+	popl	%eax
+	addl	%eax, %edx
+	ret
+
+1:
+	pushl	%eax
+	addl	$LenChoice2, %eax
+	call	RangeDecoderBitDecode
+	popl	%eax
+	jc	1f
+	pushl	$kLenNumLowSymbols
+	movb	$kLenNumMidBits, %cl
+	addl	$LenMid, %eax
+	jmp	2b
+
+1:
+	pushl	$(kLenNumLowSymbols + kLenNumMidSymbols)
+	addl	$LenHigh, %eax
+	movb	$kLenNumHighBits, %cl
+	jmp	3b
+
+WriteByte:
+	movb	%al, prev_byte
+	stosb
+	incl	now_pos
+	ret
+
+/*
+ * int LzmaDecode(CLzmaDecoderState *vs,
+ *                const unsigned char *inStream,
+ *                unsigned char *outStream,
+ *                SizeT outSize);
+ */
+
+_LzmaDecodeA:
+
+	pushl	%ebp
+	movl	%esp, %ebp
+	subl	$LOCAL_SIZE, %esp
+
+#ifndef ASM_FILE
+	pushl	%esi
+	pushl	%edi
+	pushl	%ebx
+
+	movl	%eax, %ebx
+	movl	%edx, %esi
+	pushl	%ecx
+#else
+	pushl	%edi
+#endif
+
+	cld
+
+#ifdef FIXED_PROPS
+	movl	%ebx, %edi
+	movl	$(Literal + (LZMA_LIT_SIZE << (FIXED_LC + FIXED_LP))), %ecx
+#else
+	movl	$LZMA_LIT_SIZE, %eax
+	movb	lc, %cl
+	addb	lp, %cl
+	shll	%cl, %eax
+	addl	$Literal, %eax
+	movl	%eax, %ecx
+	movl	probs, %edi
+#endif
+
+	movl	$(kBitModelTotal >> 1), %eax
+
+	rep
+	stosl
+
+	popl	%edi
+
+	xorl	%eax, %eax
+	movl	%eax, now_pos
+	movl	%eax, prev_byte
+	movl	%eax, state
+
+	incl	%eax
+	movl	%eax, rep0
+	movl	%eax, rep1
+	movl	%eax, rep2
+	movl	%eax, rep3
+
+#ifndef FIXED_PROPS
+	movl	%eax, %edx
+	movb	pb, %cl
+	shll	%cl, %edx
+	decl	%edx
+	movl	%edx, pos_state_mask
+
+	movl	%eax, %edx
+	movb	lp, %cl
+	shll	%cl, %edx
+	decl	%edx
+	movl	%edx, lit_pos_mask;
+#endif
+
+	/* RangeDecoderInit */
+	negl	%eax
+	movl	%eax, range
+
+	incl	%eax
+	movb	$5, %cl
+
+1:
+	shll	$8, %eax
+	lodsb
+	loop	1b
+
+	movl	%eax, code
+
+lzma_decode_loop:
+	movl	now_pos, %eax
+	cmpl	out_size, %eax
+
+	jb	1f
+
+#ifndef ASM_FILE
+	xorl	%eax, %eax
+
+	popl	%ebx
+	popl	%edi
+	popl	%esi
+#endif
+
+	movl	%ebp, %esp
+	popl	%ebp
+	ret
+
+1:
+#ifdef FIXED_PROPS
+	andl	$POS_STATE_MASK, %eax
+#else
+	andl	pos_state_mask, %eax
+#endif
+	pushl	%eax				/* posState */
+	movl	state, %edx
+	shll	$kNumPosBitsMax, %edx
+	addl	%edx, %eax
+	pushl	%eax				/* (state << kNumPosBitsMax) + posState */
+
+	call	RangeDecoderBitDecode
+	jc	1f
+
+	movl	now_pos, %eax
+
+#ifdef FIXED_PROPS
+	andl	$LIT_POS_MASK, %eax
+	shll	$FIXED_LC, %eax
+	movl	prev_byte, %edx
+	shrl	$(8 - FIXED_LC), %edx
+#else
+	andl	lit_pos_mask, %eax
+	movb	lc, %cl
+	shll	%cl, %eax
+	negb	%cl
+	addb	$8, %cl
+	movl	prev_byte, %edx
+	shrl	%cl, %edx
+#endif
+
+	addl	%edx, %eax
+	movl	$LZMA_LIT_SIZE, %edx
+	mull	%edx
+	addl	$Literal, %eax
+	pushl	%eax
+
+	incl	%edx			/* edx = 1 */
+
+	movl	rep0, %eax
+	negl	%eax
+	pushl	(%edi, %eax)		/* matchByte */
+
+	cmpb	$kNumLitStates, state
+	jb	5f
+
+	/* LzmaLiteralDecodeMatch */
+
+3:
+	cmpl	$0x100, %edx
+	jae	4f
+
+	xorl	%eax, %eax
+	shlb	$1, (%esp)
+	adcl	%eax, %eax
+
+	pushl	%eax
+	pushl	%edx
+
+	shll	$8, %eax
+	leal	0x100(%edx, %eax), %eax
+	addl	12(%esp), %eax
+	call	RangeDecoderBitDecode
+
+	setc	%al
+	popl	%edx
+	adcl	%edx, %edx
+
+	popl	%ecx
+	cmpb	%cl, %al
+	jz	3b
+
+5:
+
+	/* LzmaLiteralDecode */
+
+	cmpl	$0x100, %edx
+	jae	4f
+
+	pushl	%edx
+	movl	%edx, %eax
+	addl	8(%esp), %eax
+	call	RangeDecoderBitDecode
+	popl	%edx
+	adcl	%edx, %edx
+	jmp	5b
+
+4:
+	addl	$16, %esp
+
+	movb	%dl, %al
+	call	WriteByte
+
+	movb	state, %al
+	cmpb	$4, %al
+	jae	2f
+	xorb	%al, %al
+	jmp	3f
+2:
+	subb	$3, %al
+	cmpb	$7, %al
+	jb	3f
+	subb	$3, %al
+3:
+	movb	%al, state
+	jmp	lzma_decode_loop
+
+1:
+	movl	state, %eax
+	addl	$IsRep, %eax
+	call	RangeDecoderBitDecode
+	jnc	1f
+
+	movl	state, %eax
+	addl	$IsRepG0, %eax
+	call	RangeDecoderBitDecode
+	jc	10f
+
+	movl	(%esp), %eax
+	addl	$IsRep0Long, %eax
+	call	RangeDecoderBitDecode
+	jc	20f
+
+	cmpb	$7, state
+	movb	$9, state
+	jb	100f
+	addb	$2, state
+100:
+
+	movl	$1, %ecx
+
+3:
+	movl	rep0, %edx
+	negl	%edx
+
+4:
+	movb	(%edi, %edx), %al
+	call	WriteByte
+	loop	4b
+
+	popl	%eax
+	popl	%eax
+	jmp	lzma_decode_loop
+
+10:
+	movl	state, %eax
+	addl	$IsRepG1, %eax
+	call	RangeDecoderBitDecode
+	movl	rep1, %edx
+	jnc	100f
+
+	movl	state, %eax
+	addl	$IsRepG2, %eax
+	call	RangeDecoderBitDecode
+	movl	rep2, %edx
+	jnc	1000f
+	movl	rep2, %edx
+	xchgl	rep3, %edx
+1000:
+	pushl	rep1
+	popl	rep2
+100:
+	xchg	rep0, %edx
+	movl	%edx, rep1
+20:
+
+	movl	$RepLenCoder, %eax
+	call	LzmaLenDecode
+
+	cmpb	$7, state
+	movb	$8, state
+	jb	100f
+	addb	$3, state
+100:
+	jmp	2f
+
+1:
+	movl	rep0, %eax
+	xchgl	rep1, %eax
+	xchgl	rep2, %eax
+	movl	%eax, rep3
+
+	cmpb	$7, state
+	movb	$7, state
+	jb	10f
+	addb	$3, state
+10:
+
+	movl	$LenCoder, %eax
+	call	LzmaLenDecode
+	pushl	%edx
+
+	movl	$(kNumLenToPosStates - 1), %eax
+	cmpl	%eax, %edx
+	jbe	100f
+	movl	%eax, %edx
+100:
+	movb	$kNumPosSlotBits, %cl
+	shll	%cl, %edx
+	leal	PosSlot(%edx), %eax
+	call	RangeDecoderBitTreeDecode
+
+	movl	%edx, rep0
+	cmpl	$kStartPosModelIndex, %edx
+	jb	100f
+
+	movl	%edx, %ecx
+	shrl	$1, %ecx
+	decl	%ecx
+
+	movzbl	%dl, %eax
+	andb	$1, %al
+	orb	$2, %al
+	shll	%cl, %eax
+	movl	%eax, rep0
+
+	cmpl	$kEndPosModelIndex, %edx
+	jae	200f
+	movl	rep0, %eax
+	addl	$(SpecPos - 1), %eax
+	subl	%edx, %eax
+	jmp	300f
+200:
+
+	subb	$kNumAlignBits, %cl
+
+	/* RangeDecoderDecodeDirectBits */
+	xorl	%edx, %edx
+
+1000:
+	shrl	$1, range
+	shll	$1, %edx
+
+	movl	range, %eax
+	cmpl	%eax, code
+	jb	2000f
+	subl	%eax, code
+	orb	$1, %dl
+2000:
+
+	cmpl	$kTopValue, %eax
+	jae	3000f
+	shll	$8, range
+	shll	$8, code
+	lodsb
+	movb	%al, code
+
+3000:
+	loop	1000b
+
+	movb	$kNumAlignBits, %cl
+	shll	%cl, %edx
+	addl	%edx, rep0
+
+	movl	$Align, %eax
+
+300:
+	call	RangeDecoderReverseBitTreeDecode
+	addl	%ecx, rep0
+
+100:
+	incl	rep0
+	popl	%edx
+
+2:
+
+	addl	$kMatchMinLen, %edx
+	movl	%edx, %ecx
+
+	jmp	3b
--- a/grub-core/kern/i386/pc/mmap.c
+++ b/grub-core/kern/i386/pc/mmap.c
@ -0,0 +1,155 @@
+/*
+ *  GRUB  --  GRand Unified Bootloader
+ *  Copyright (C) 2002,2003,2004,2005,2006,2007,2008  Free Software Foundation, Inc.
+ *
+ *  GRUB is free software: you can redistribute it and/or modify
+ *  it under the terms of the GNU General Public License as published by
+ *  the Free Software Foundation, either version 3 of the License, or
+ *  (at your option) any later version.
+ *
+ *  GRUB is distributed in the hope that it will be useful,
+ *  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
+ *  along with GRUB.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#include <grub/machine/init.h>
+#include <grub/machine/int.h>
+#include <grub/machine/memory.h>
+#include <grub/err.h>
+#include <grub/types.h>
+#include <grub/misc.h>
+
+/*
+ * grub_get_ext_memsize() :  return the extended memory size in KB.
+ *	BIOS call "INT 15H, AH=88H" to get extended memory size
+ *	The return value in AX.
+ *
+ */
+static inline grub_uint16_t
+grub_get_ext_memsize (void)
+{
+  struct grub_bios_int_registers regs;
+
+  regs.eax = 0x8800;
+  regs.flags = GRUB_CPU_INT_FLAGS_DEFAULT;
+  grub_bios_interrupt (0x15, &regs);
+  return regs.eax & 0xffff;
+}
+
+/* Get a packed EISA memory map. Lower 16 bits are between 1MB and 16MB
+   in 1KB parts, and upper 16 bits are above 16MB in 64KB parts. If error, return zero.
+   BIOS call "INT 15H, AH=E801H" to get EISA memory map,
+     AX = memory between 1M and 16M in 1K parts.
+     BX = memory above 16M in 64K parts. 
+*/
+ 
+static inline grub_uint32_t
+grub_get_eisa_mmap (void)
+{
+  struct grub_bios_int_registers regs;
+
+  regs.flags = GRUB_CPU_INT_FLAGS_DEFAULT;
+  regs.eax = 0xe801;
+  grub_bios_interrupt (0x15, &regs);
+
+  if ((regs.eax & 0xff00) == 0x8600)
+    return 0;
+
+  return (regs.eax & 0xffff) | (regs.ebx << 16);
+}
+
+/*
+ *
+ * grub_get_mmap_entry(addr, cont) : address and old continuation value (zero to
+ *		start), for the Query System Address Map BIOS call.
+ *
+ *  Sets the first 4-byte int value of "addr" to the size returned by
+ *  the call.  If the call fails, sets it to zero.
+ *
+ *	Returns:  new (non-zero) continuation value, 0 if done.
+ */
+/* Get a memory map entry. Return next continuation value. Zero means
+   the end.  */
+static grub_uint32_t
+grub_get_mmap_entry (struct grub_machine_mmap_entry *entry,
+		     grub_uint32_t cont)
+{
+  struct grub_bios_int_registers regs;
+
+  regs.flags = GRUB_CPU_INT_FLAGS_DEFAULT;
+
+  /* place address (+4) in ES:DI */
+  regs.es = ((grub_addr_t) &entry->addr) >> 4;
+  regs.edi = ((grub_addr_t) &entry->addr) & 0xf;
+	
+  /* set continuation value */
+  regs.ebx = cont;
+
+  /* set default maximum buffer size */
+  regs.ecx = sizeof (*entry) - sizeof (entry->size);
+
+  /* set EDX to 'SMAP' */
+  regs.edx = 0x534d4150;
+
+  regs.eax = 0xe820;
+  grub_bios_interrupt (0x15, &regs);
+
+  /* write length of buffer (zero if error) into ADDR */	
+  if ((regs.flags & GRUB_CPU_INT_FLAGS_CARRY) || regs.eax != 0x534d4150
+      || regs.ecx < 0x14 || regs.ecx > 0x400)
+    entry->size = 0;
+  else
+    entry->size = regs.ecx;
+
+  /* return the continuation value */
+  return regs.ebx;
+}
+
+grub_err_t
+grub_machine_mmap_iterate (int NESTED_FUNC_ATTR (*hook) (grub_uint64_t, grub_uint64_t, grub_uint32_t))
+{
+  grub_uint32_t cont;
+  struct grub_machine_mmap_entry *entry
+    = (struct grub_machine_mmap_entry *) GRUB_MEMORY_MACHINE_SCRATCH_ADDR;
+
+  grub_memset (entry, 0, sizeof (entry));
+
+  /* Check if grub_get_mmap_entry works.  */
+  cont = grub_get_mmap_entry (entry, 0);
+
+  if (entry->size)
+    do
+      {
+	if (hook (entry->addr, entry->len,
+		  /* Multiboot mmaps have been defined to match with the E820 definition.
+		     Therefore, we can just pass type through.  */
+		  entry->type))
+	  break;
+
+	if (! cont)
+	  break;
+
+	grub_memset (entry, 0, sizeof (entry));
+
+	cont = grub_get_mmap_entry (entry, cont);
+      }
+    while (entry->size);
+  else
+    {
+      grub_uint32_t eisa_mmap = grub_get_eisa_mmap ();
+
+      if (eisa_mmap)
+	{
+	  if (hook (0x100000, (eisa_mmap & 0xFFFF) << 10, GRUB_MACHINE_MEMORY_AVAILABLE) == 0)
+	    hook (0x1000000, eisa_mmap & ~0xFFFF, GRUB_MACHINE_MEMORY_AVAILABLE);
+	}
+      else
+	hook (0x100000, grub_get_ext_memsize () << 10, GRUB_MACHINE_MEMORY_AVAILABLE);
+    }
+
+  return 0;
+}
--- a/grub-core/kern/i386/pc/startup.S
+++ b/grub-core/kern/i386/pc/startup.S
--- a/grub-core/kern/i386/pit.c
+++ b/grub-core/kern/i386/pit.c
@ -0,0 +1,56 @@
+/*
+ *  GRUB  --  GRand Unified Bootloader
+ *  Copyright (C) 2008  Free Software Foundation, Inc.
+ *
+ *  GRUB is free software: you can redistribute it and/or modify
+ *  it under the terms of the GNU General Public License as published by
+ *  the Free Software Foundation, either version 3 of the License, or
+ *  (at your option) any later version.
+ *
+ *  GRUB is distributed in the hope that it will be useful,
+ *  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
+ *  along with GRUB.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#include <grub/types.h>
+#include <grub/i386/io.h>
+#include <grub/i386/pit.h>
+
+#define TIMER2_REG_CONTROL	0x42
+#define TIMER_REG_COMMAND	0x43
+#define TIMER2_REG_LATCH	0x61
+
+#define TIMER2_SELECT		0x80
+#define TIMER_ENABLE_LSB	0x20
+#define TIMER_ENABLE_MSB	0x10
+#define TIMER2_LATCH		0x20
+#define TIMER2_SPEAKER		0x02
+#define TIMER2_GATE		0x01
+
+void
+grub_pit_wait (grub_uint16_t tics)
+{
+  /* Disable timer2 gate and speaker.  */
+  grub_outb (grub_inb (TIMER2_REG_LATCH) & ~ (TIMER2_SPEAKER | TIMER2_GATE),
+             TIMER2_REG_LATCH);
+
+  /* Set tics.  */
+  grub_outb (TIMER2_SELECT | TIMER_ENABLE_LSB | TIMER_ENABLE_MSB, TIMER_REG_COMMAND);
+  grub_outb (tics & 0xff, TIMER2_REG_CONTROL);
+  grub_outb (tics >> 8, TIMER2_REG_CONTROL);
+
+  /* Enable timer2 gate, keep speaker disabled.  */
+  grub_outb ((grub_inb (TIMER2_REG_LATCH) & ~ TIMER2_SPEAKER) | TIMER2_GATE,
+             TIMER2_REG_LATCH);
+
+  /* Wait.  */
+  while ((grub_inb (TIMER2_REG_LATCH) & TIMER2_LATCH) == 0x00);
+
+  /* Disable timer2 gate and speaker.  */
+  grub_outb (grub_inb (TIMER2_REG_LATCH) & ~ (TIMER2_SPEAKER | TIMER2_GATE),
+             TIMER2_REG_LATCH);
+}
--- a/grub-core/kern/i386/qemu/init.c
+++ b/grub-core/kern/i386/qemu/init.c
@ -0,0 +1,147 @@
+/*
+ *  GRUB  --  GRand Unified Bootloader
+ *  Copyright (C) 2010  Free Software Foundation, Inc.
+ *
+ *  GRUB is free software: you can redistribute it and/or modify
+ *  it under the terms of the GNU General Public License as published by
+ *  the Free Software Foundation, either version 3 of the License, or
+ *  (at your option) any later version.
+ *
+ *  GRUB is distributed in the hope that it will be useful,
+ *  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
+ *  along with GRUB.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#include <grub/pci.h>
+#include <grub/machine/kernel.h>
+#include <grub/misc.h>
+#include <grub/vga.h>
+
+static struct {grub_uint8_t r, g, b, a; } colors[] =
+  {
+    // {R, G, B, A}
+    {0x00, 0x00, 0x00, 0xFF}, // 0 = black
+    {0x00, 0x00, 0xA8, 0xFF}, // 1 = blue
+    {0x00, 0xA8, 0x00, 0xFF}, // 2 = green
+    {0x00, 0xA8, 0xA8, 0xFF}, // 3 = cyan
+    {0xA8, 0x00, 0x00, 0xFF}, // 4 = red
+    {0xA8, 0x00, 0xA8, 0xFF}, // 5 = magenta
+    {0xA8, 0x54, 0x00, 0xFF}, // 6 = brown
+    {0xA8, 0xA8, 0xA8, 0xFF}, // 7 = light gray
+
+    {0x54, 0x54, 0x54, 0xFF}, // 8 = dark gray
+    {0x54, 0x54, 0xFE, 0xFF}, // 9 = bright blue
+    {0x54, 0xFE, 0x54, 0xFF}, // 10 = bright green
+    {0x54, 0xFE, 0xFE, 0xFF}, // 11 = bright cyan
+    {0xFE, 0x54, 0x54, 0xFF}, // 12 = bright red
+    {0xFE, 0x54, 0xFE, 0xFF}, // 13 = bright magenta
+    {0xFE, 0xFE, 0x54, 0xFF}, // 14 = yellow
+    {0xFE, 0xFE, 0xFE, 0xFF}  // 15 = white
+  };
+
+#include <ascii.h>
+
+static void
+load_font (void)
+{
+  unsigned i;
+
+  grub_vga_gr_write (0 << 2, GRUB_VGA_GR_GR6);
+
+  grub_vga_sr_write (GRUB_VGA_SR_MEMORY_MODE_NORMAL, GRUB_VGA_SR_MEMORY_MODE);
+  grub_vga_sr_write (1 << GRUB_VGA_TEXT_FONT_PLANE,
+		     GRUB_VGA_SR_MAP_MASK_REGISTER);
+
+  grub_vga_gr_write (0, GRUB_VGA_GR_DATA_ROTATE);
+  grub_vga_gr_write (0, GRUB_VGA_GR_MODE);
+  grub_vga_gr_write (0xff, GRUB_VGA_GR_BITMASK);
+
+  for (i = 0; i < 128; i++)
+    grub_memcpy ((void *) (0xa0000 + 32 * i), ascii_bitmaps + 16 * i, 16);
+}
+
+static void
+load_palette (void)
+{
+  unsigned i;
+  for (i = 0; i < 16; i++)
+    grub_vga_write_arx (i, i);
+
+  for (i = 0; i < ARRAY_SIZE (colors); i++)
+    grub_vga_palette_write (i, colors[i].r, colors[i].g, colors[i].b);
+}
+
+void
+grub_qemu_init_cirrus (void)
+{
+  auto int NESTED_FUNC_ATTR find_card (grub_pci_device_t dev, grub_pci_id_t pciid);
+  int NESTED_FUNC_ATTR find_card (grub_pci_device_t dev, grub_pci_id_t pciid __attribute__ ((unused)))
+    {
+      grub_pci_address_t addr;
+      grub_uint32_t class;
+
+      addr = grub_pci_make_address (dev, GRUB_PCI_REG_CLASS);
+      class = grub_pci_read (addr);
+
+      if (((class >> 16) & 0xffff) != GRUB_PCI_CLASS_SUBCLASS_VGA)
+	return 0;
+      
+      /* FIXME: chooose addresses dynamically.  */
+      addr = grub_pci_make_address (dev, GRUB_PCI_REG_ADDRESS_REG0);
+      grub_pci_write (addr, 0xf0000000 | GRUB_PCI_ADDR_MEM_PREFETCH
+		      | GRUB_PCI_ADDR_SPACE_MEMORY | GRUB_PCI_ADDR_MEM_TYPE_32);
+      addr = grub_pci_make_address (dev, GRUB_PCI_REG_ADDRESS_REG1);
+      grub_pci_write (addr, 0xf2000000
+		      | GRUB_PCI_ADDR_SPACE_MEMORY | GRUB_PCI_ADDR_MEM_TYPE_32);
+ 
+      addr = grub_pci_make_address (dev, GRUB_PCI_REG_COMMAND);
+      grub_pci_write (addr, GRUB_PCI_COMMAND_MEM_ENABLED
+		      | GRUB_PCI_COMMAND_IO_ENABLED);
+      
+      return 1;
+    }
+
+  grub_pci_iterate (find_card);
+
+  grub_outb (GRUB_VGA_IO_MISC_COLOR, GRUB_VGA_IO_MISC_WRITE);
+
+  load_font ();
+
+  grub_vga_gr_write (GRUB_VGA_GR_GR6_MMAP_CGA, GRUB_VGA_GR_GR6);
+  grub_vga_gr_write (GRUB_VGA_GR_MODE_ODD_EVEN, GRUB_VGA_GR_MODE);
+
+  grub_vga_sr_write (GRUB_VGA_SR_MEMORY_MODE_NORMAL, GRUB_VGA_SR_MEMORY_MODE);
+
+  grub_vga_sr_write ((1 << GRUB_VGA_TEXT_TEXT_PLANE)
+		     | (1 << GRUB_VGA_TEXT_ATTR_PLANE),
+		     GRUB_VGA_SR_MAP_MASK_REGISTER);
+
+  grub_vga_cr_write (15, GRUB_VGA_CR_CELL_HEIGHT);
+  grub_vga_cr_write (79, GRUB_VGA_CR_HORIZ_END);
+  grub_vga_cr_write (40, GRUB_VGA_CR_PITCH);
+
+  int vert = 25 * 16;
+  grub_vga_cr_write (vert & 0xff, GRUB_VGA_CR_VDISPLAY_END);
+  grub_vga_cr_write (((vert >> GRUB_VGA_CR_OVERFLOW_HEIGHT1_SHIFT)
+		      & GRUB_VGA_CR_OVERFLOW_HEIGHT1_MASK)
+		     | ((vert >> GRUB_VGA_CR_OVERFLOW_HEIGHT2_SHIFT)
+			& GRUB_VGA_CR_OVERFLOW_HEIGHT2_MASK),
+		     GRUB_VGA_CR_OVERFLOW);
+
+  load_palette ();
+
+  grub_vga_write_arx (GRUB_VGA_ARX_MODE_TEXT, GRUB_VGA_ARX_MODE);
+  grub_vga_write_arx (0, GRUB_VGA_ARX_COLOR_SELECT);
+
+  grub_vga_sr_write (GRUB_VGA_SR_CLOCKING_MODE_8_DOT_CLOCK,
+		     GRUB_VGA_SR_CLOCKING_MODE);
+
+  grub_vga_cr_write (14, GRUB_VGA_CR_CURSOR_START);
+  grub_vga_cr_write (15, GRUB_VGA_CR_CURSOR_END);
+
+  grub_outb (0x20, 0x3c0);
+}
--- a/grub-core/kern/i386/qemu/mmap.c
+++ b/grub-core/kern/i386/qemu/mmap.c
@ -0,0 +1,98 @@
+/*
+ *  GRUB  --  GRand Unified Bootloader
+ *  Copyright (C) 2009  Free Software Foundation, Inc.
+ *
+ *  GRUB is free software: you can redistribute it and/or modify
+ *  it under the terms of the GNU General Public License as published by
+ *  the Free Software Foundation, either version 3 of the License, or
+ *  (at your option) any later version.
+ *
+ *  GRUB is distributed in the hope that it will be useful,
+ *  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
+ *  along with GRUB.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#include <grub/machine/memory.h>
+#include <grub/machine/boot.h>
+#include <grub/types.h>
+#include <grub/err.h>
+#include <grub/misc.h>
+#include <grub/cmos.h>
+
+#define QEMU_CMOS_MEMSIZE_HIGH		0x35
+#define QEMU_CMOS_MEMSIZE_LOW		0x34
+
+#define QEMU_CMOS_MEMSIZE2_HIGH		0x31
+#define QEMU_CMOS_MEMSIZE2_LOW		0x30
+
+#define min(a,b)	((a) > (b) ? (b) : (a))
+
+extern char _start[];
+extern char _end[];
+
+static grub_uint64_t mem_size, above_4g;
+
+void
+grub_machine_mmap_init ()
+{
+  mem_size = ((grub_uint64_t) grub_cmos_read (QEMU_CMOS_MEMSIZE_HIGH)) << 24
+    | ((grub_uint64_t) grub_cmos_read (QEMU_CMOS_MEMSIZE_LOW)) << 16;
+  if (mem_size > 0)
+    {
+      /* Don't ask... */
+      mem_size += (16 * 1024 * 1024);
+    }
+  else
+    {
+      mem_size
+	= ((((grub_uint64_t) grub_cmos_read (QEMU_CMOS_MEMSIZE2_HIGH)) << 18)
+	   | ((grub_uint64_t) (grub_cmos_read (QEMU_CMOS_MEMSIZE2_LOW)) << 10))
+	+ 1024 * 1024;
+    }
+
+  above_4g = (((grub_uint64_t) grub_cmos_read (0x5b)) << 16)
+    | (((grub_uint64_t) grub_cmos_read (0x5c)) << 24)
+    | (((grub_uint64_t) grub_cmos_read (0x5d)) << 32);
+}
+
+grub_err_t
+grub_machine_mmap_iterate (int NESTED_FUNC_ATTR (*hook) (grub_uint64_t, grub_uint64_t, grub_uint32_t))
+{
+  if (hook (0x0,
+	    (grub_addr_t) _start,
+	    GRUB_MACHINE_MEMORY_AVAILABLE))
+    return 1;
+
+  if (hook ((grub_addr_t) _end,
+           0xa0000 - (grub_addr_t) _end,
+           GRUB_MACHINE_MEMORY_AVAILABLE))
+    return 1;
+
+  if (hook (GRUB_MEMORY_MACHINE_UPPER,
+	    0x100000 - GRUB_MEMORY_MACHINE_UPPER,
+	    GRUB_MACHINE_MEMORY_RESERVED))
+    return 1;
+
+  /* Everything else is free.  */
+  if (hook (0x100000,
+	    min (mem_size, (grub_uint32_t) -GRUB_BOOT_MACHINE_SIZE) - 0x100000,
+	    GRUB_MACHINE_MEMORY_AVAILABLE))
+    return 1;
+
+  /* Protect boot.img, which contains the gdt.  It is mapped at the top of memory
+     (it is also mapped below 0x100000, but we already reserved that area).  */
+  if (hook ((grub_uint32_t) -GRUB_BOOT_MACHINE_SIZE,
+	    GRUB_BOOT_MACHINE_SIZE,
+	    GRUB_MACHINE_MEMORY_RESERVED))
+    return 1;
+
+  if (above_4g != 0 && hook (0x100000000ULL, above_4g,
+			     GRUB_MACHINE_MEMORY_AVAILABLE))
+    return 1;
+
+  return 0;
+}
--- a/grub-core/kern/i386/qemu/startup.S
+++ b/grub-core/kern/i386/qemu/startup.S
@ -0,0 +1,102 @@
+/*
+ *  GRUB  --  GRand Unified Bootloader
+ *  Copyright (C) 1999,2000,2001,2002,2003,2005,2006,2007,2008,2009 Free Software Foundation, Inc.
+ *
+ *  GRUB is free software: you can redistribute it and/or modify
+ *  it under the terms of the GNU General Public License as published by
+ *  the Free Software Foundation, either version 3 of the License, or
+ *  (at your option) any later version.
+ *
+ *  GRUB is distributed in the hope that it will be useful,
+ *  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
+ *  along with GRUB.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#include <config.h>
+#include <grub/symbol.h>
+#include <grub/machine/memory.h>
+#include <grub/machine/kernel.h>
+
+	.text
+	.code32
+	.globl _start
+_start:
+	jmp	codestart
+
+	. = _start + GRUB_KERNEL_I386_QEMU_CORE_ENTRY_ADDR
+VARIABLE(grub_core_entry_addr)
+	.long	0
+VARIABLE(grub_kernel_image_size)
+	.long	0
+VARIABLE(grub_prefix)
+	/* to be filled by grub-mkimage */
+
+	/*
+	 *  Leave some breathing room for the prefix.
+	 */
+
+	. = _start + GRUB_KERNEL_MACHINE_PREFIX_END
+
+codestart:
+	/* Relocate to low memory.  First we figure out our location.
+	   We will derive the rom start address from it.  */
+	call	1f
+1:	popl	%esi
+
+	/* Rom size is a multiple of 64 kiB.  With this we get the
+	   value of `grub_core_entry_addr' in %esi.  */
+	xorw	%si, %si
+
+	/* ... which allows us to access `grub_kernel_image_size'
+	   before relocation.  */
+	movl	(grub_kernel_image_size - _start)(%esi), %ecx
+
+
+	movl	$_start, %edi
+	cld
+	rep
+	movsb
+	ljmp	$GRUB_MEMORY_MACHINE_PROT_MODE_CSEG, $1f
+1:
+
+#ifdef APPLE_CC
+	/* clean out the bss */
+	bss_start_abs = ABS (bss_start)
+	bss_end_abs = ABS (bss_end)
+
+	movl    bss_start_abs, %edi
+
+	/* compute the bss length */
+	movl	bss_end_abs, %ecx
+	subl	%edi, %ecx
+#else
+	/* clean out the bss */
+	movl	$BSS_START_SYMBOL, %edi
+
+	/* compute the bss length */
+	movl	$END_SYMBOL, %ecx
+	subl	%edi, %ecx
+#endif
+		
+	/* clean out */
+	xorl	%eax, %eax
+	cld
+	rep
+	stosb
+
+	/*
+	 *  Call the start of main body of C code.
+	 */
+	call	EXT_C(grub_main)
+
+	/* This should never happen.  */
+	cli
+1:	
+	hlt
+	jmp 1b
+
+#include "../realmode.S"
--- a/grub-core/kern/i386/realmode.S
+++ b/grub-core/kern/i386/realmode.S
@ -0,0 +1,242 @@
+/*
+ *  GRUB  --  GRand Unified Bootloader
+ *  Copyright (C) 1999,2000,2001,2002,2003,2005,2006,2007,2009,2010 Free Software Foundation, Inc.
+ *
+ *  GRUB is free software: you can redistribute it and/or modify
+ *  it under the terms of the GNU General Public License as published by
+ *  the Free Software Foundation, either version 3 of the License, or
+ *  (at your option) any later version.
+ *
+ *  GRUB is distributed in the hope that it will be useful,
+ *  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
+ *  along with GRUB.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#include <grub/i386/pc/memory.h>
+
+/*
+ * Note: These functions defined in this file may be called from C.
+ *       Be careful of that you must not modify some registers. Quote
+ *       from gcc-2.95.2/gcc/config/i386/i386.h:
+
+   1 for registers not available across function calls.
+   These must include the FIXED_REGISTERS and also any
+   registers that can be used without being saved.
+   The latter must include the registers where values are returned
+   and the register where structure-value addresses are passed.
+   Aside from that, you can include as many other registers as you like.
+
+  ax,dx,cx,bx,si,di,bp,sp,st,st1,st2,st3,st4,st5,st6,st7,arg
+{  1, 1, 1, 0, 0, 0, 0, 1, 1,  1,  1,  1,  1,  1,  1,  1,  1 }
+ */
+
+/*
+ * Note: GRUB is compiled with the options -mrtd and -mregparm=3.
+ *       So the first three arguments are passed in %eax, %edx, and %ecx,
+ *       respectively, and if a function has a fixed number of arguments
+ *       and the number if greater than three, the function must return
+ *       with "ret $N" where N is ((the number of arguments) - 3) * 4.
+ */
+
+/*
+ *  This is the area for all of the special variables.
+ */
+
+	.p2align	2	/* force 4-byte alignment */
+
+protstack:
+	.long	GRUB_MEMORY_MACHINE_PROT_STACK
+
+/*
+ * This is the Global Descriptor Table
+ *
+ *  An entry, a "Segment Descriptor", looks like this:
+ *
+ * 31          24         19   16                 7           0
+ * ------------------------------------------------------------
+ * |             | |B| |A|       | |   |1|0|E|W|A|            |
+ * | BASE 31..24 |G|/|L|V| LIMIT |P|DPL|  TYPE   | BASE 23:16 |  4
+ * |             | |D| |L| 19..16| |   |1|1|C|R|A|            |
+ * ------------------------------------------------------------
+ * |                             |                            |
+ * |        BASE 15..0           |       LIMIT 15..0          |  0
+ * |                             |                            |
+ * ------------------------------------------------------------
+ *
+ *  Note the ordering of the data items is reversed from the above
+ *  description.
+ */
+
+	.p2align	2	/* force 4-byte alignment */
+gdt:
+	.word	0, 0
+	.byte	0, 0, 0, 0
+
+	/* -- code segment --
+	 * base = 0x00000000, limit = 0xFFFFF (4 KiB Granularity), present
+	 * type = 32bit code execute/read, DPL = 0
+	 */
+	.word	0xFFFF, 0
+	.byte	0, 0x9A, 0xCF, 0
+
+	/* -- data segment --
+	 * base = 0x00000000, limit 0xFFFFF (4 KiB Granularity), present
+	 * type = 32 bit data read/write, DPL = 0
+	 */
+	.word	0xFFFF, 0
+	.byte	0, 0x92, 0xCF, 0
+
+	/* -- 16 bit real mode CS --
+	 * base = 0x00000000, limit 0x0FFFF (1 B Granularity), present
+	 * type = 16 bit code execute/read only/conforming, DPL = 0
+	 */
+	.word	0xFFFF, 0
+	.byte	0, 0x9E, 0, 0
+
+	/* -- 16 bit real mode DS --
+	 * base = 0x00000000, limit 0x0FFFF (1 B Granularity), present
+	 * type = 16 bit data read/write, DPL = 0
+	 */
+	.word	0xFFFF, 0
+	.byte	0, 0x92, 0, 0
+
+
+/* this is the GDT descriptor */
+gdtdesc:
+	.word	0x27			/* limit */
+	.long	gdt			/* addr */
+
+/*
+ *  These next two routines, "real_to_prot" and "prot_to_real" are structured
+ *  in a very specific way.  Be very careful when changing them.
+ *
+ *  NOTE:  Use of either one messes up %eax and %ebp.
+ */
+
+real_to_prot:
+	.code16
+	cli
+
+	/* load the GDT register */
+	xorw	%ax, %ax
+	movw	%ax, %ds
+	DATA32	ADDR32	lgdt	gdtdesc
+
+	/* turn on protected mode */
+	movl	%cr0, %eax
+	orl	$GRUB_MEMORY_CPU_CR0_PE_ON, %eax
+	movl	%eax, %cr0
+
+	/* jump to relocation, flush prefetch queue, and reload %cs */
+	DATA32	ljmp	$GRUB_MEMORY_MACHINE_PROT_MODE_CSEG, $protcseg
+
+	.code32
+protcseg:
+	/* reload other segment registers */
+	movw	$GRUB_MEMORY_MACHINE_PROT_MODE_DSEG, %ax
+	movw	%ax, %ds
+	movw	%ax, %es
+	movw	%ax, %fs
+	movw	%ax, %gs
+	movw	%ax, %ss
+
+	/* put the return address in a known safe location */
+	movl	(%esp), %eax
+	movl	%eax, GRUB_MEMORY_MACHINE_REAL_STACK
+
+	/* get protected mode stack */
+	movl	protstack, %eax
+	movl	%eax, %esp
+	movl	%eax, %ebp
+
+	/* get return address onto the right stack */
+	movl	GRUB_MEMORY_MACHINE_REAL_STACK, %eax
+	movl	%eax, (%esp)
+
+	/* zero %eax */
+	xorl	%eax, %eax
+
+	/* return on the old (or initialized) stack! */
+	ret
+
+prot_to_real:
+	/* just in case, set GDT */
+	lgdt	gdtdesc
+
+	/* save the protected mode stack */
+	movl	%esp, %eax
+	movl	%eax, protstack
+
+	/* get the return address */
+	movl	(%esp), %eax
+	movl	%eax, GRUB_MEMORY_MACHINE_REAL_STACK
+
+	/* set up new stack */
+	movl	$GRUB_MEMORY_MACHINE_REAL_STACK, %eax
+	movl	%eax, %esp
+	movl	%eax, %ebp
+
+	/* set up segment limits */
+	movw	$GRUB_MEMORY_MACHINE_PSEUDO_REAL_DSEG, %ax
+	movw	%ax, %ds
+	movw	%ax, %es
+	movw	%ax, %fs
+	movw	%ax, %gs
+	movw	%ax, %ss
+
+	/* this might be an extra step */
+	/* jump to a 16 bit segment */
+	ljmp	$GRUB_MEMORY_MACHINE_PSEUDO_REAL_CSEG, $tmpcseg
+
+tmpcseg:
+	.code16
+
+	/* clear the PE bit of CR0 */
+	movl	%cr0, %eax
+	andl 	$(~GRUB_MEMORY_CPU_CR0_PE_ON), %eax
+	movl	%eax, %cr0
+
+	/* flush prefetch queue, reload %cs */
+	DATA32	ljmp	$0, $realcseg
+
+realcseg:
+	/* we are in real mode now
+	 * set up the real mode segment registers : DS, SS, ES
+	 */
+	/* zero %eax */
+	xorl	%eax, %eax
+
+	movw	%ax, %ds
+	movw	%ax, %es
+	movw	%ax, %fs
+	movw	%ax, %gs
+	movw	%ax, %ss
+
+#ifdef GRUB_MACHINE_PCBIOS
+	/* restore interrupts */
+	sti
+#endif
+
+	/* return on new stack! */
+	DATA32	ret
+
+	.code32
+
+/*
+ * grub_reboot()
+ *
+ * Reboot the system. At the moment, rely on BIOS.
+ */
+FUNCTION(grub_reboot)
+	call	prot_to_real
+	.code16
+cold_reboot:
+	/* set 0x472 to 0x0000 for cold boot (0x1234 for warm boot) */
+	movw	$0x0472, %di
+	movw	%ax, (%di)
+	ljmp	$0xf000, $0xfff0
+	.code32
--- a/grub-core/kern/i386/tsc.c
+++ b/grub-core/kern/i386/tsc.c
@ -0,0 +1,74 @@
+/* kern/i386/tsc.c - x86 TSC time source implementation
+ * Requires Pentium or better x86 CPU that supports the RDTSC instruction.
+ * This module uses the RTC (via grub_get_rtc()) to calibrate the TSC to
+ * real time.
+ *
+ *  GRUB  --  GRand Unified Bootloader
+ *  Copyright (C) 2008  Free Software Foundation, Inc.
+ *
+ *  GRUB is free software: you can redistribute it and/or modify
+ *  it under the terms of the GNU General Public License as published by
+ *  the Free Software Foundation, either version 3 of the License, or
+ *  (at your option) any later version.
+ *
+ *  GRUB is distributed in the hope that it will be useful,
+ *  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
+ *  along with GRUB.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#include <grub/types.h>
+#include <grub/time.h>
+#include <grub/misc.h>
+#include <grub/i386/tsc.h>
+#include <grub/i386/pit.h>
+
+/* This defines the value TSC had at the epoch (that is, when we calibrated it). */
+static grub_uint64_t tsc_boot_time;
+
+/* Calibrated TSC rate.  (In TSC ticks per millisecond.) */
+static grub_uint64_t tsc_ticks_per_ms;
+
+
+grub_uint64_t
+grub_tsc_get_time_ms (void)
+{
+  return tsc_boot_time + grub_divmod64 (grub_get_tsc (), tsc_ticks_per_ms, 0);
+}
+
+
+/* How many RTC ticks to use for calibration loop. (>= 1) */
+#define CALIBRATION_TICKS 2
+
+/* Calibrate the TSC based on the RTC.  */
+static void
+calibrate_tsc (void)
+{
+  /* First calibrate the TSC rate (relative, not absolute time). */
+  grub_uint64_t start_tsc;
+  grub_uint64_t end_tsc;
+
+  start_tsc = grub_get_tsc ();
+  grub_pit_wait (0xffff);
+  end_tsc = grub_get_tsc ();
+
+  tsc_ticks_per_ms = grub_divmod64 (end_tsc - start_tsc, 55, 0);
+}
+
+void
+grub_tsc_init (void)
+{
+  if (grub_cpu_is_tsc_supported ())
+    {
+      tsc_boot_time = grub_get_tsc ();
+      calibrate_tsc ();
+      grub_install_get_time_ms (grub_tsc_get_time_ms);
+    }
+  else
+    {
+      grub_install_get_time_ms (grub_rtc_get_time_ms);
+    }
+}