Adding upstream version 2.06.upstream/2.06upstream

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

26 files changed, 3025 insertions, 0 deletions

diff --git a/grub-core/kern/i386/coreboot/cbtable.c b/grub-core/kern/i386/coreboot/cbtable.c
new file mode 100644
index 0000000..34a2b59
--- /dev/null
+++ b/grub-core/kern/i386/coreboot/cbtable.c
@@ -0,0 +1,44 @@
+/*
+ *  GRUB  --  GRand Unified Bootloader
+ *  Copyright (C) 2007,2008,2013  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/coreboot/memory.h>
+#include <grub/coreboot/lbio.h>
+#include <grub/types.h>
+#include <grub/err.h>
+#include <grub/misc.h>
+#include <grub/dl.h>
+
+GRUB_MOD_LICENSE ("GPLv3+");
+
+grub_linuxbios_table_header_t
+grub_linuxbios_get_tables (void)
+{
+  grub_linuxbios_table_header_t table_header;
+  /* 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 (grub_linuxbios_check_signature (table_header))
+      return table_header;
+
+  for (table_header = (grub_linuxbios_table_header_t) 0xf0000;
+       table_header < (grub_linuxbios_table_header_t) 0x100000; table_header++)
+    if (grub_linuxbios_check_signature (table_header))
+      return table_header;
+
+  return 0;
+}
diff --git a/grub-core/kern/i386/coreboot/init.c b/grub-core/kern/i386/coreboot/init.c
new file mode 100644
index 0000000..3314f02
--- /dev/null
+++ b/grub-core/kern/i386/coreboot/init.c
@@ -0,0 +1,143 @@
+/*
+ *  GRUB  --  GRand Unified Bootloader
+ *  Copyright (C) 2002,2003,2004,2005,2006,2007,2008,2009,2013  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/offsets.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>
+#include <grub/video.h>
+
+extern grub_uint8_t _start[];
+extern grub_uint8_t _end[];
+extern grub_uint8_t _edata[];
+
+void  __attribute__ ((noreturn))
+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 ();
+}
+
+grub_addr_t grub_modbase = GRUB_KERNEL_I386_COREBOOT_MODULES_ADDR;
+static grub_uint64_t modend;
+static int have_memory = 0;
+
+/* Helper for grub_machine_init.  */
+static int
+heap_init (grub_uint64_t addr, grub_uint64_t size, grub_memory_type_t type,
+	   void *data __attribute__ ((unused)))
+{
+  grub_uint64_t begin = addr, end = addr + size;
+
+#if GRUB_CPU_SIZEOF_VOID_P == 4
+  /* Restrict ourselves to 32-bit memory space.  */
+  if (begin > GRUB_ULONG_MAX)
+    return 0;
+  if (end > GRUB_ULONG_MAX)
+    end = GRUB_ULONG_MAX;
+#endif
+
+  if (type != GRUB_MEMORY_AVAILABLE)
+    return 0;
+
+  /* Avoid the lower memory.  */
+  if (begin < GRUB_MEMORY_MACHINE_LOWER_SIZE)
+    begin = GRUB_MEMORY_MACHINE_LOWER_SIZE;
+
+  if (modend && begin < modend)
+    begin = modend;
+  
+  if (end <= begin)
+    return 0;
+
+  grub_mm_init_region ((void *) (grub_addr_t) begin, (grub_size_t) (end - begin));
+
+  have_memory = 1;
+
+  return 0;
+}
+
+#ifndef GRUB_MACHINE_MULTIBOOT
+
+void
+grub_machine_init (void)
+{
+  modend = grub_modules_get_end ();
+
+  grub_video_coreboot_fb_early_init ();
+
+  grub_vga_text_init ();
+
+  grub_machine_mmap_iterate (heap_init, NULL);
+  if (!have_memory)
+    grub_fatal ("No memory found");
+
+  grub_video_coreboot_fb_late_init ();
+
+  grub_font_init ();
+  grub_gfxterm_init ();
+
+  grub_tsc_init ();
+}
+
+#else
+
+void
+grub_machine_init (void)
+{
+  modend = grub_modules_get_end ();
+
+  grub_vga_text_init ();
+
+  grub_machine_mmap_init ();
+  grub_machine_mmap_iterate (heap_init, NULL);
+
+  grub_tsc_init ();
+}
+
+#endif
+
+void
+grub_machine_get_bootlocation (char **device __attribute__ ((unused)),
+			       char **path __attribute__ ((unused)))
+{
+}
+
+void
+grub_machine_fini (int flags)
+{
+  if (flags & GRUB_LOADER_FLAG_NORETURN)
+    grub_vga_text_fini ();
+  grub_stop_floppy ();
+}
diff --git a/grub-core/kern/i386/coreboot/startup.S b/grub-core/kern/i386/coreboot/startup.S
new file mode 100644
index 0000000..df6adba
--- /dev/null
+++ b/grub-core/kern/i386/coreboot/startup.S
@@ -0,0 +1,62 @@
+/*
+ *  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/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:
+#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)
+
+/*
+ *  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
+
diff --git a/grub-core/kern/i386/dl.c b/grub-core/kern/i386/dl.c
new file mode 100644
index 0000000..1346da5
--- /dev/null
+++ b/grub-core/kern/i386/dl.c
@@ -0,0 +1,81 @@
+/* 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>
+#include <grub/i18n.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, N_("invalid arch-dependent ELF magic"));
+
+  return GRUB_ERR_NONE;
+}
+
+/* Relocate symbols.  */
+grub_err_t
+grub_arch_dl_relocate_symbols (grub_dl_t mod, void *ehdr,
+			       Elf_Shdr *s, grub_dl_segment_t seg)
+{
+  Elf_Rel *rel, *max;
+
+  for (rel = (Elf_Rel *) ((char *) ehdr + s->sh_offset),
+	 max = (Elf_Rel *) ((char *) rel + s->sh_size);
+       rel < max;
+       rel = (Elf_Rel *) ((char *) rel + s->sh_entsize))
+    {
+      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
+			 + mod->symsize * 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 - (grub_addr_t) addr);
+	  break;
+	default:
+	  return grub_error (GRUB_ERR_NOT_IMPLEMENTED_YET,
+			     N_("relocation 0x%x is not implemented yet"),
+			     ELF_R_TYPE (rel->r_info));
+	}
+    }
+
+  return GRUB_ERR_NONE;
+}
diff --git a/grub-core/kern/i386/efi/init.c b/grub-core/kern/i386/efi/init.c
new file mode 100644
index 0000000..46476e2
--- /dev/null
+++ b/grub-core/kern/i386/efi/init.c
@@ -0,0 +1,48 @@
+/* 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>
+#include <grub/loader.h>
+
+void
+grub_machine_init (void)
+{
+  grub_efi_init ();
+  grub_tsc_init ();
+}
+
+void
+grub_machine_fini (int flags)
+{
+  if (!(flags & GRUB_LOADER_FLAG_NORETURN))
+    return;
+
+  grub_efi_fini ();
+
+  if (!(flags & GRUB_LOADER_FLAG_EFI_KEEP_ALLOCATED_MEMORY))
+    grub_efi_memory_fini ();
+}
diff --git a/grub-core/kern/i386/efi/startup.S b/grub-core/kern/i386/efi/startup.S
new file mode 100644
index 0000000..fc5ea3d
--- /dev/null
+++ b/grub-core/kern/i386/efi/startup.S
@@ -0,0 +1,36 @@
+/* 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>
+
+        .file   "startup.S"
+        .text
+        .globl  start, _start
+start:
+_start:
+	/*
+	 *  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
diff --git a/grub-core/kern/i386/efi/tsc.c b/grub-core/kern/i386/efi/tsc.c
new file mode 100644
index 0000000..4b93ba8
--- /dev/null
+++ b/grub-core/kern/i386/efi/tsc.c
@@ -0,0 +1,40 @@
+/* kern/i386/tsc.c - x86 TSC time source implementation
+ * Requires Pentium or better x86 CPU that supports the RDTSC instruction.
+ * This module uses the PIT 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/efi/efi.h>
+#include <grub/efi/api.h>
+
+int
+grub_tsc_calibrate_from_efi (void)
+{
+  grub_uint64_t start_tsc, end_tsc;
+  /* Use EFI Time Service to calibrate TSC */
+  start_tsc = grub_get_tsc ();
+  efi_call_1 (grub_efi_system_table->boot_services->stall, 1000);
+  end_tsc = grub_get_tsc ();
+  grub_tsc_rate = grub_divmod64 ((1ULL << 32), end_tsc - start_tsc, 0);
+  return 1;
+}
diff --git a/grub-core/kern/i386/ieee1275/startup.S b/grub-core/kern/i386/ieee1275/startup.S
new file mode 100644
index 0000000..62cf348
--- /dev/null
+++ b/grub-core/kern/i386/ieee1275/startup.S
@@ -0,0 +1,40 @@
+/*
+ *  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/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:
+	movl %eax, EXT_C(grub_ieee1275_entry_fn)
+	jmp EXT_C(grub_main)
+
diff --git a/grub-core/kern/i386/int.S b/grub-core/kern/i386/int.S
new file mode 100644
index 0000000..862a542
--- /dev/null
+++ b/grub-core/kern/i386/int.S
@@ -0,0 +1,134 @@
+/*
+ *  GRUB  --  GRand Unified Bootloader
+ *  Copyright (C) 2010,2011 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/>.
+ */
+
+FUNCTION(grub_bios_interrupt)
+	pushf
+	cli
+	popf
+	pushl    %ebp
+	pushl    %ecx
+	pushl    %eax
+	pushl    %ebx
+	pushl    %esi
+	pushl    %edi	
+	pushl    %edx
+	
+	movb     %al, intno
+	movl	 (%edx), %eax
+	movl	 %eax, LOCAL(bios_register_eax)
+	movw	 4(%edx), %ax
+	movw	 %ax, LOCAL(bios_register_es)
+	movw	 6(%edx), %ax
+	movw	 %ax, LOCAL(bios_register_ds)
+	movw	 8(%edx), %ax
+	movw	 %ax, LOCAL(bios_register_flags)
+
+	movl 	12(%edx), %ebx
+	movl 	16(%edx), %ecx
+	movl 	20(%edx), %edi
+	movl 	24(%edx), %esi
+	movl 	28(%edx), %edx
+
+	/*
+	Via C3 CPUs have cache coherence problems, so we need to call
+	wbinvd at these 2 points. As wbinvd slows down boot, don't do
+	it on non-VIA. 9090 is nop nop. */
+VARIABLE(grub_bios_via_workaround1)
+	.byte 0x90, 0x90
+
+	PROT_TO_REAL
+	.code16
+	pushf
+	cli
+	
+	mov	%ds, %ax
+	push	%ax
+
+	/* movw imm16, %ax*/
+	.byte	0xb8
+LOCAL(bios_register_es):
+	.short 	0
+	movw	%ax, %es
+	/* movw imm16, %ax*/
+	.byte	0xb8
+LOCAL(bios_register_ds):
+	.short 	0
+	movw	%ax, %ds
+
+	/* movw imm16, %ax*/
+	.byte	0xb8
+LOCAL(bios_register_flags):
+	.short 	0
+	push	%ax
+	popf
+
+	/* movl imm32, %eax*/
+	.byte	0x66, 0xb8
+LOCAL(bios_register_eax):
+	.long 	0
+	
+	/* int imm8.  */
+	.byte   0xcd
+intno:	
+	.byte   0
+
+	movl 	%eax, %cs:LOCAL(bios_register_eax)
+	movw	%ds, %ax
+	movw 	%ax, %cs:LOCAL(bios_register_ds)
+	pop 	%ax
+	mov	%ax, %ds
+	pushf
+	pop	%ax
+	movw	%ax, LOCAL(bios_register_flags)
+	mov 	%es, %ax
+	movw	%ax, LOCAL(bios_register_es)
+
+	popf
+
+VARIABLE(grub_bios_via_workaround2)
+	.byte 0x90, 0x90
+
+	REAL_TO_PROT
+	.code32
+
+	popl    %eax
+
+	movl 	%ebx, 12(%eax)
+	movl 	%ecx, 16(%eax)
+	movl 	%edi, 20(%eax)
+	movl 	%esi, 24(%eax)
+	movl 	%edx, 28(%eax)
+
+	movl     %eax, %edx
+
+	movl	 LOCAL(bios_register_eax), %eax
+	movl	 %eax, (%edx)
+	movw	 LOCAL(bios_register_es), %ax
+	movw	 %ax, 4(%edx)
+	movw	 LOCAL(bios_register_ds), %ax
+	movw	 %ax, 6(%edx)
+	movw	 LOCAL(bios_register_flags), %ax
+	movw	 %ax, 8(%edx)
+
+	popl 	%edi
+	popl 	%esi
+	popl    %ebx
+	popl    %eax
+	popl    %ecx
+	popl    %ebp
+	ret
diff --git a/grub-core/kern/i386/multiboot_mmap.c b/grub-core/kern/i386/multiboot_mmap.c
new file mode 100644
index 0000000..e8f4f34
--- /dev/null
+++ b/grub-core/kern/i386/multiboot_mmap.c
@@ -0,0 +1,73 @@
+/*
+ *  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>
+
+/* 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 (void)
+{
+  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;
+}
+
+grub_err_t
+grub_machine_mmap_iterate (grub_memory_hook_t hook, void *hook_data)
+{
+  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, hook_data))
+	break;
+
+      entry = (void *) ((grub_addr_t) entry + entry->size + sizeof (entry->size));
+    }
+
+  return 0;
+}
diff --git a/grub-core/kern/i386/pc/acpi.c b/grub-core/kern/i386/pc/acpi.c
new file mode 100644
index 0000000..297f5d0
--- /dev/null
+++ b/grub-core/kern/i386/pc/acpi.c
@@ -0,0 +1,83 @@
+/* acpi.c - get acpi tables. */
+/*
+ *  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/acpi.h>
+#include <grub/misc.h>
+
+struct grub_acpi_rsdp_v10 *
+grub_machine_acpi_get_rsdpv1 (void)
+{
+  int ebda_len;
+  grub_uint8_t *ebda, *ptr;
+
+  grub_dprintf ("acpi", "Looking for RSDP. Scanning EBDA\n");
+  ebda = (grub_uint8_t *) ((* ((grub_uint16_t *) 0x40e)) << 4);
+  ebda_len = * (grub_uint16_t *) ebda;
+  if (! ebda_len) /* FIXME do we really need this check? */
+    goto scan_bios;
+  for (ptr = ebda; ptr < ebda + 0x400; ptr += 16)
+    if (grub_memcmp (ptr, GRUB_RSDP_SIGNATURE, GRUB_RSDP_SIGNATURE_SIZE) == 0
+	&& grub_byte_checksum (ptr, sizeof (struct grub_acpi_rsdp_v10)) == 0
+	&& ((struct grub_acpi_rsdp_v10 *) ptr)->revision == 0)
+      return (struct grub_acpi_rsdp_v10 *) ptr;
+
+scan_bios:
+  grub_dprintf ("acpi", "Looking for RSDP. Scanning BIOS\n");
+  for (ptr = (grub_uint8_t *) 0xe0000; ptr < (grub_uint8_t *) 0x100000;
+       ptr += 16)
+    if (grub_memcmp (ptr, GRUB_RSDP_SIGNATURE, GRUB_RSDP_SIGNATURE_SIZE) == 0
+	&& grub_byte_checksum (ptr, sizeof (struct grub_acpi_rsdp_v10)) == 0
+	&& ((struct grub_acpi_rsdp_v10 *) ptr)->revision == 0)
+      return (struct grub_acpi_rsdp_v10 *) ptr;
+  return 0;
+}
+
+struct grub_acpi_rsdp_v20 *
+grub_machine_acpi_get_rsdpv2 (void)
+{
+  int ebda_len;
+  grub_uint8_t *ebda, *ptr;
+
+  grub_dprintf ("acpi", "Looking for RSDP. Scanning EBDA\n");
+  ebda = (grub_uint8_t *) ((* ((grub_uint16_t *) 0x40e)) << 4);
+  ebda_len = * (grub_uint16_t *) ebda;
+  if (! ebda_len) /* FIXME do we really need this check? */
+    goto scan_bios;
+  for (ptr = ebda; ptr < ebda + 0x400; ptr += 16)
+    if (grub_memcmp (ptr, GRUB_RSDP_SIGNATURE, GRUB_RSDP_SIGNATURE_SIZE) == 0
+	&& grub_byte_checksum (ptr, sizeof (struct grub_acpi_rsdp_v10)) == 0
+	&& ((struct grub_acpi_rsdp_v10 *) ptr)->revision != 0
+	&& ((struct grub_acpi_rsdp_v20 *) ptr)->length < 1024
+	&& grub_byte_checksum (ptr, ((struct grub_acpi_rsdp_v20 *) ptr)->length)
+	== 0)
+      return (struct grub_acpi_rsdp_v20 *) ptr;
+
+scan_bios:
+  grub_dprintf ("acpi", "Looking for RSDP. Scanning BIOS\n");
+  for (ptr = (grub_uint8_t *) 0xe0000; ptr < (grub_uint8_t *) 0x100000;
+       ptr += 16)
+    if (grub_memcmp (ptr, GRUB_RSDP_SIGNATURE, GRUB_RSDP_SIGNATURE_SIZE) == 0
+	&& grub_byte_checksum (ptr, sizeof (struct grub_acpi_rsdp_v10)) == 0
+	&& ((struct grub_acpi_rsdp_v10 *) ptr)->revision != 0
+	&& ((struct grub_acpi_rsdp_v20 *) ptr)->length < 1024
+	&& grub_byte_checksum (ptr, ((struct grub_acpi_rsdp_v20 *) ptr)->length)
+	== 0)
+      return (struct grub_acpi_rsdp_v20 *) ptr;
+  return 0;
+}
diff --git a/grub-core/kern/i386/pc/init.c b/grub-core/kern/i386/pc/init.c
new file mode 100644
index 0000000..27bc68b
--- /dev/null
+++ b/grub-core/kern/i386/pc/init.c
@@ -0,0 +1,271 @@
+/*
+ *  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/i386/floppy.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/cpuid.h>
+#include <grub/cpu/tsc.h>
+#include <grub/machine/time.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;
+
+void (*grub_pc_net_config) (char **device, char **path);
+
+/*
+ *	return the real time in ticks, of which there are about
+ *	18-20 per second
+ */
+grub_uint64_t
+grub_rtc_get_time_ms (void)
+{
+  struct grub_bios_int_registers regs;
+
+  regs.eax = 0;
+  regs.flags = GRUB_CPU_INT_FLAGS_DEFAULT;
+  grub_bios_interrupt (0x1a, &regs);
+
+  return ((regs.ecx << 16) | (regs.edx & 0xffff)) * 55ULL;
+}
+
+void
+grub_machine_get_bootlocation (char **device, char **path)
+{
+  char *ptr;
+  grub_uint8_t boot_drive, dos_part, bsd_part;
+
+  boot_drive = (grub_boot_device >> 24);
+  dos_part = (grub_boot_device >> 16);
+  bsd_part = (grub_boot_device >> 8);
+
+  /* No hardcoded root partition - make it from the boot drive and the
+     partition number encoded at the install time.  */
+  if (boot_drive == GRUB_BOOT_MACHINE_PXE_DL)
+    {
+      if (grub_pc_net_config)
+	grub_pc_net_config (device, path);
+      return;
+    }
+
+  /* XXX: This should be enough.  */
+#define DEV_SIZE 100
+  *device = grub_malloc (DEV_SIZE);
+  ptr = *device;
+  grub_snprintf (*device, DEV_SIZE,
+		 "%cd%u", (boot_drive & 0x80) ? 'h' : 'f',
+		 boot_drive & 0x7f);
+  ptr += grub_strlen (ptr);
+
+  if (dos_part != 0xff)
+    grub_snprintf (ptr, DEV_SIZE - (ptr - *device),
+		   ",%u", dos_part + 1);
+  ptr += grub_strlen (ptr);
+
+  if (bsd_part != 0xff)
+    grub_snprintf (ptr, DEV_SIZE - (ptr - *device), ",%u",
+		   bsd_part + 1);
+  ptr += grub_strlen (ptr);
+  *ptr = 0;
+}
+
+/* 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_addr_t grub_modbase;
+extern grub_uint8_t _start[], _edata[];
+
+/* Helper for grub_machine_init.  */
+static int
+mmap_iterate_hook (grub_uint64_t addr, grub_uint64_t size,
+		   grub_memory_type_t type,
+		   void *data __attribute__ ((unused)))
+{
+  /* Avoid the lower memory.  */
+  if (addr < GRUB_MEMORY_MACHINE_UPPER_START)
+    {
+      if (size <= GRUB_MEMORY_MACHINE_UPPER_START - addr)
+	return 0;
+
+      size -= GRUB_MEMORY_MACHINE_UPPER_START - addr;
+      addr = GRUB_MEMORY_MACHINE_UPPER_START;
+    }
+
+  /* Ignore >4GB.  */
+  if (addr <= 0xFFFFFFFF && type == GRUB_MEMORY_AVAILABLE)
+    {
+      grub_size_t len;
+
+      len = (grub_size_t) ((addr + size > 0xFFFFFFFF)
+	     ? 0xFFFFFFFF - addr
+	     : size);
+      add_mem_region (addr, len);
+    }
+
+  return 0;
+}
+
+extern grub_uint16_t grub_bios_via_workaround1, grub_bios_via_workaround2;
+
+/* Via needs additional wbinvd.  */
+static void
+grub_via_workaround_init (void)
+{
+  grub_uint32_t manufacturer[3], max_cpuid;
+  if (! grub_cpu_is_cpuid_supported ())
+    return;
+
+  grub_cpuid (0, max_cpuid, manufacturer[0], manufacturer[2], manufacturer[1]);
+
+  if (grub_memcmp (manufacturer, "CentaurHauls", 12) != 0)
+    return;
+
+  grub_bios_via_workaround1 = 0x090f;
+  grub_bios_via_workaround2 = 0x090f;
+  asm volatile ("wbinvd");
+}
+
+void
+grub_machine_init (void)
+{
+  int i;
+#if 0
+  int grub_lower_mem;
+#endif
+  grub_addr_t modend;
+
+  /* This has to happen before any BIOS calls. */
+  grub_via_workaround_init ();
+
+  grub_modbase = GRUB_MEMORY_MACHINE_DECOMPRESSION_ADDR + (_edata - _start);
+
+  /* Initialize the console as early as possible.  */
+  grub_console_init ();
+
+  /* This sanity check is useless since top of GRUB_MEMORY_MACHINE_RESERVED_END
+     is used for stack and if it's unavailable we wouldn't have gotten so far.
+   */
+#if 0
+  grub_lower_mem = grub_get_conv_memsize () << 10;
+
+  /* Sanity check.  */
+  if (grub_lower_mem < GRUB_MEMORY_MACHINE_RESERVED_END)
+    grub_fatal ("too small memory");
+#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
+
+  grub_machine_mmap_iterate (mmap_iterate_hook, NULL);
+
+  compact_mem_regions ();
+
+  modend = grub_modules_get_end ();
+  for (i = 0; i < num_regions; i++)
+    {
+      grub_addr_t beg = mem_regions[i].addr;
+      grub_addr_t fin = mem_regions[i].addr + mem_regions[i].size;
+      if (modend && beg < modend)
+	beg = modend;
+      if (beg >= fin)
+	continue;
+      grub_mm_init_region ((void *) beg, fin - beg);
+    }
+
+  grub_tsc_init ();
+}
+
+void
+grub_machine_fini (int flags)
+{
+  if (flags & GRUB_LOADER_FLAG_NORETURN)
+    grub_console_fini ();
+  grub_stop_floppy ();
+}
diff --git a/grub-core/kern/i386/pc/mmap.c b/grub-core/kern/i386/pc/mmap.c
new file mode 100644
index 0000000..c0c3c35
--- /dev/null
+++ b/grub-core/kern/i386/pc/mmap.c
@@ -0,0 +1,193 @@
+/*
+ *  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/memory.h>
+#include <grub/machine/int.h>
+#include <grub/err.h>
+#include <grub/types.h>
+#include <grub/misc.h>
+
+struct grub_machine_mmap_entry
+{
+  grub_uint32_t size;
+  grub_uint64_t addr;
+  grub_uint64_t len;
+#define GRUB_MACHINE_MEMORY_AVAILABLE	1
+#define GRUB_MACHINE_MEMORY_RESERVED	2
+#define GRUB_MACHINE_MEMORY_ACPI	3
+#define GRUB_MACHINE_MEMORY_NVS 	4
+#define GRUB_MACHINE_MEMORY_BADRAM 	5
+  grub_uint32_t type;
+} GRUB_PACKED;
+
+
+/*
+ *
+ * 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;
+}
+
+/*
+ * 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 (grub_memory_hook_t hook, void *hook_data)
+{
+  grub_uint32_t cont = 0;
+  struct grub_machine_mmap_entry *entry
+    = (struct grub_machine_mmap_entry *) GRUB_MEMORY_MACHINE_SCRATCH_ADDR;
+  int e820_works = 0;
+
+  while (1)
+    {
+      grub_memset (entry, 0, sizeof (*entry));
+
+      cont = grub_get_mmap_entry (entry, cont);
+
+      if (!entry->size)
+	break;
+
+      if (entry->len)
+	e820_works = 1;
+      if (entry->len
+	  && hook (entry->addr, entry->len,
+		   /* GRUB mmaps have been defined to match with
+		      the E820 definition.
+		      Therefore, we can just pass type through.  */
+		   entry->type, hook_data))
+	break;
+
+      if (! cont)
+	break;
+    }
+
+  if (!e820_works)
+    {
+      grub_uint32_t eisa_mmap = grub_get_eisa_mmap ();
+
+      if (hook (0x0, ((grub_uint32_t) grub_get_conv_memsize ()) << 10,
+		GRUB_MEMORY_AVAILABLE, hook_data))
+	return 0;
+
+      if (eisa_mmap)
+	{
+	  if (hook (0x100000, (eisa_mmap & 0xFFFF) << 10,
+		    GRUB_MEMORY_AVAILABLE, hook_data) == 0)
+	    hook (0x1000000, eisa_mmap & ~0xFFFF, GRUB_MEMORY_AVAILABLE,
+		  hook_data);
+	}
+      else
+	hook (0x100000, ((grub_uint32_t) grub_get_ext_memsize ()) << 10,
+	      GRUB_MEMORY_AVAILABLE, hook_data);
+    }
+
+  return 0;
+}
diff --git a/grub-core/kern/i386/pc/startup.S b/grub-core/kern/i386/pc/startup.S
new file mode 100644
index 0000000..b8a9b33
--- /dev/null
+++ b/grub-core/kern/i386/pc/startup.S
@@ -0,0 +1,217 @@
+/*
+ *  GRUB  --  GRand Unified Bootloader
+ *  Copyright (C) 1999,2000,2001,2002,2003,2005,2006,2007,2008,2009,2011 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 is greater than three, the function must return
+ *       with "ret $N" where N is ((the number of arguments) - 3) * 4.
+ */
+
+#include <config.h>
+#include <grub/symbol.h>
+#include <multiboot.h>
+#ifdef __APPLE__
+#include <grub/i386/pc/memory.h>
+#endif
+
+	.file	"startup.S"
+
+	.text
+
+	.globl	start, _start, __start
+start:
+_start:
+__start:
+#ifdef __APPLE__
+LOCAL(start):
+#endif
+	.code32
+
+	movl	%ecx, (LOCAL(real_to_prot_addr) - _start) (%esi)
+	movl	%edi, (LOCAL(prot_to_real_addr) - _start) (%esi)
+	movl	%eax, (EXT_C(grub_realidt) - _start) (%esi)
+
+	/* copy back the decompressed part (except the modules) */
+#ifdef __APPLE__
+	movl	$EXT_C(_edata), %ecx
+	subl    $LOCAL(start), %ecx
+#else
+	movl	$(_edata - _start), %ecx
+#endif
+	movl	$(_start), %edi
+	rep
+	movsb
+
+	movl	$LOCAL (cont), %esi
+	jmp	*%esi
+LOCAL(cont):
+
+#if 0
+	/* copy modules before cleaning out the bss */
+	movl	EXT_C(grub_total_module_size), %ecx
+	movl	EXT_C(grub_kernel_image_size), %esi
+	addl	%ecx, %esi
+	addl	$_start, %esi
+	decl	%esi
+	movl	$END_SYMBOL, %edi
+	addl	%ecx, %edi
+	decl	%edi
+	std
+	rep
+	movsb
+#endif
+
+#ifdef __APPLE__
+	/* clean out the bss */
+	movl	$EXT_C(_edata), %edi
+
+	/* compute the bss length */
+	movl	$GRUB_MEMORY_MACHINE_SCRATCH_ADDR, %ecx
+#else
+	/* clean out the bss */
+	movl	$BSS_START_SYMBOL, %edi
+
+	/* compute the bss length */
+	movl	$END_SYMBOL, %ecx
+#endif
+	subl	%edi, %ecx
+
+	/* clean out */
+	xorl	%eax, %eax
+	cld
+	rep
+	stosb
+
+	movl	%edx, EXT_C(grub_boot_device)
+
+	/*
+	 *  Call the start of main body of C code.
+	 */
+	call EXT_C(grub_main)
+
+LOCAL(real_to_prot_addr):
+	.long 0
+LOCAL(prot_to_real_addr):
+	.long 0
+
+	.macro PROT_TO_REAL
+	movl	LOCAL(prot_to_real_addr), %eax
+	call	*%eax
+	.endm
+
+	.macro REAL_TO_PROT
+	movl	LOCAL(real_to_prot_addr), %eax
+	calll	*%eax
+	.endm
+
+/*
+ * grub_exit()
+ *
+ * Exit the system.
+ */
+FUNCTION(grub_exit)
+	PROT_TO_REAL
+	.code16
+	/* Tell the BIOS a boot failure. If this does not work, reboot.  */
+	int	$0x18
+	/* set 0x472 to 0x0000 for cold boot (0x1234 for warm boot) */
+	xorw	%ax, %ax
+	movw	$0x0472, %di
+	movw	%ax, (%di)
+	ljmp	$0xf000, $0xfff0
+	.code32
+
+/*
+ * int grub_pxe_call (int func, void* data, grub_uint32_t pxe_rm_entry);
+ */
+FUNCTION(grub_pxe_call)
+	pushl	%ebp
+	movl	%esp, %ebp
+	pushl	%esi
+	pushl	%edi
+	pushl	%ebx
+
+	movl	%ecx, %ebx
+	movl	%eax, %ecx
+	movl	%edx, %eax
+	andl	$0xF, %eax
+	shrl	$4, %edx
+	shll	$16, %edx
+	addl	%eax, %edx
+
+	PROT_TO_REAL
+	.code16
+
+	pushl	%ebx
+	pushl	%edx
+	pushw	%cx
+	movw	%sp, %bx
+	lcall	*%ss:6(%bx)
+	cld
+	addw	$10, %sp
+	movw	%ax, %cx
+
+	REAL_TO_PROT
+	.code32
+
+	movzwl	%cx, %eax
+
+	popl	%ebx
+	popl	%edi
+	popl	%esi
+	popl	%ebp
+	ret
+
+#include "../int.S"
+
+VARIABLE(grub_realidt)
+	.long 0
+
+#ifdef __APPLE__
+	/* Older versions of objconv assume that there is the same number
+	   of text and data sections. Hence this dummy.  */
+	.section __TEXT, __zz_dummy
+	.byte 0
+	.globl EXT_C(_edata)
+	.globl EXT_C(grub_boot_device)
+	.zerofill __DATA, __aa_before_bss, EXT_C(_edata), 1, 0
+	.zerofill __DATA, __bss, EXT_C(grub_boot_device), 4, 2
+#else
+	.bss
+VARIABLE(grub_boot_device)
+	.long	0
+#endif
diff --git a/grub-core/kern/i386/qemu/init.c b/grub-core/kern/i386/qemu/init.c
new file mode 100644
index 0000000..271b6fb
--- /dev/null
+++ b/grub-core/kern/i386/qemu/init.c
@@ -0,0 +1,276 @@
+/*
+ *  GRUB  --  GRand Unified Bootloader
+ *  Copyright (C) 2002,2003,2004,2005,2006,2007,2008,2009,2013  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/offsets.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>
+#include <grub/machine/kernel.h>
+#include <grub/pci.h>
+
+extern grub_uint8_t _start[];
+extern grub_uint8_t _end[];
+extern grub_uint8_t _edata[];
+
+void  __attribute__ ((noreturn))
+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 ();
+}
+
+grub_addr_t grub_modbase;
+
+/* Helper for grub_machine_init.  */
+static int
+heap_init (grub_uint64_t addr, grub_uint64_t size, grub_memory_type_t type,
+	   void *data __attribute__ ((unused)))
+{
+  grub_uint64_t begin = addr, end = addr + size;
+
+#if GRUB_CPU_SIZEOF_VOID_P == 4
+  /* Restrict ourselves to 32-bit memory space.  */
+  if (begin > GRUB_ULONG_MAX)
+    return 0;
+  if (end > GRUB_ULONG_MAX)
+    end = GRUB_ULONG_MAX;
+#endif
+
+  if (type != GRUB_MEMORY_AVAILABLE)
+    return 0;
+
+  /* Avoid the lower memory.  */
+  if (begin < GRUB_MEMORY_MACHINE_LOWER_SIZE)
+    begin = GRUB_MEMORY_MACHINE_LOWER_SIZE;
+
+  if (end <= begin)
+    return 0;
+
+  grub_mm_init_region ((void *) (grub_addr_t) begin, (grub_size_t) (end - begin));
+
+  return 0;
+}
+
+struct resource
+{
+  grub_pci_device_t dev;
+  grub_size_t size;
+  unsigned type:4;
+  unsigned bar:3;
+};
+
+struct iterator_ctx
+{
+  struct resource *resources;
+  grub_size_t nresources;
+};
+
+/* We don't support bridges, so can't have more than 32 devices.  */
+#define MAX_DEVICES 32
+
+static int
+find_resources (grub_pci_device_t dev,
+		grub_pci_id_t pciid __attribute__ ((unused)),
+		void *data)
+{
+  struct iterator_ctx *ctx = data;
+  int bar;
+
+  if (ctx->nresources >= MAX_DEVICES * 6)
+    return 1;
+
+  for (bar = 0; bar < 6; bar++)
+    {
+      grub_pci_address_t addr;
+      grub_uint32_t ones, zeros, mask;
+      struct resource *res;
+      addr = grub_pci_make_address (dev, GRUB_PCI_REG_ADDRESS_REG0
+				    + 4 * bar);
+      grub_pci_write (addr, 0xffffffff);
+      grub_pci_read (addr);
+      ones = grub_pci_read (addr);
+      grub_pci_write (addr, 0);
+      grub_pci_read (addr);
+      zeros = grub_pci_read (addr);
+      if (ones == zeros)
+	continue;
+      res = &ctx->resources[ctx->nresources++];
+      if ((zeros & GRUB_PCI_ADDR_SPACE_MASK) == GRUB_PCI_ADDR_SPACE_IO)
+	mask = GRUB_PCI_ADDR_SPACE_MASK;
+      else
+	mask = (GRUB_PCI_ADDR_MEM_TYPE_MASK | GRUB_PCI_ADDR_SPACE_MASK | GRUB_PCI_ADDR_MEM_PREFETCH);
+
+      res->type = ones & mask;
+      res->dev = dev;
+      res->bar = bar;
+      res->size = (~((zeros ^ ones)) | mask) + 1;
+      if ((zeros & (GRUB_PCI_ADDR_MEM_TYPE_MASK | GRUB_PCI_ADDR_SPACE_MASK))
+	  == (GRUB_PCI_ADDR_SPACE_MEMORY | GRUB_PCI_ADDR_MEM_TYPE_64))
+	bar++;
+    }
+  return 0;
+}
+
+static int
+enable_cards (grub_pci_device_t dev,
+	      grub_pci_id_t pciid __attribute__ ((unused)),
+	      void *data __attribute__ ((unused)))
+{
+  grub_uint16_t cmd = 0;
+  grub_pci_address_t addr;
+  grub_uint32_t class;
+  int bar;
+
+  for (bar = 0; bar < 6; bar++)
+    {
+      grub_uint32_t val;
+      addr = grub_pci_make_address (dev, GRUB_PCI_REG_ADDRESS_REG0
+				    + 4 * bar);
+      val = grub_pci_read (addr);
+      if (!val)
+	continue;
+      if ((val & GRUB_PCI_ADDR_SPACE_MASK) == GRUB_PCI_ADDR_SPACE_IO)
+	cmd |= GRUB_PCI_COMMAND_IO_ENABLED;
+      else
+	cmd |= GRUB_PCI_COMMAND_MEM_ENABLED;
+    }
+
+  class = (grub_pci_read (addr) >> 16) & 0xffff;
+
+  if (class == GRUB_PCI_CLASS_SUBCLASS_VGA)
+    cmd |= GRUB_PCI_COMMAND_IO_ENABLED
+      | GRUB_PCI_COMMAND_MEM_ENABLED;
+
+  if (class == GRUB_PCI_CLASS_SUBCLASS_USB)
+    return 0;
+  
+  addr = grub_pci_make_address (dev, GRUB_PCI_REG_COMMAND);
+  grub_pci_write (addr, cmd);
+
+  return 0;
+}
+
+static void
+grub_pci_assign_addresses (void)
+{
+  struct iterator_ctx ctx;
+
+  {
+    struct resource resources[MAX_DEVICES * 6];
+    int done;
+    unsigned i;
+    ctx.nresources = 0;
+    ctx.resources = resources;
+    grub_uint32_t memptr = 0xf0000000;
+    grub_uint16_t ioptr = 0x1000;
+
+    grub_pci_iterate (find_resources, &ctx);
+    /* FIXME: do we need a better sort here?  */
+    do
+      {
+	done = 0;
+	for (i = 0; i + 1 < ctx.nresources; i++)
+	  if (resources[i].size < resources[i+1].size)
+	    {
+	      struct resource t;
+	      t = resources[i];
+	      resources[i] = resources[i+1];
+	      resources[i+1] = t;
+	      done = 1;
+	    }
+      }
+    while (done);
+
+    for (i = 0; i < ctx.nresources; i++)
+      {
+	grub_pci_address_t addr;
+	addr = grub_pci_make_address (resources[i].dev,
+				      GRUB_PCI_REG_ADDRESS_REG0
+				      + 4 * resources[i].bar);
+	if ((resources[i].type & GRUB_PCI_ADDR_SPACE_MASK)
+	    == GRUB_PCI_ADDR_SPACE_IO)
+	  {
+	    grub_pci_write (addr, ioptr | resources[i].type);
+	    ioptr += resources[i].size;
+	  }
+	else
+	  {
+	    grub_pci_write (addr, memptr | resources[i].type);
+	    memptr += resources[i].size;
+	    if ((resources[i].type & (GRUB_PCI_ADDR_MEM_TYPE_MASK
+				      | GRUB_PCI_ADDR_SPACE_MASK))
+		== (GRUB_PCI_ADDR_SPACE_MEMORY | GRUB_PCI_ADDR_MEM_TYPE_64))
+	      {
+		addr = grub_pci_make_address (resources[i].dev,
+					      GRUB_PCI_REG_ADDRESS_REG0
+					      + 4 * resources[i].bar + 4);
+		grub_pci_write (addr, 0);
+	      }
+	  }	  
+      }
+    grub_pci_iterate (enable_cards, NULL);
+  }
+}
+
+void
+grub_machine_init (void)
+{
+  grub_modbase = grub_core_entry_addr + (_edata - _start);
+
+  grub_pci_assign_addresses ();
+
+  grub_qemu_init_cirrus ();
+
+  grub_vga_text_init ();
+
+  grub_machine_mmap_init ();
+  grub_machine_mmap_iterate (heap_init, NULL);
+
+
+  grub_tsc_init ();
+}
+
+void
+grub_machine_get_bootlocation (char **device __attribute__ ((unused)),
+			       char **path __attribute__ ((unused)))
+{
+}
+
+void
+grub_machine_fini (int flags)
+{
+  if (flags & GRUB_LOADER_FLAG_NORETURN)
+    grub_vga_text_fini ();
+  grub_stop_floppy ();
+}
diff --git a/grub-core/kern/i386/qemu/mmap.c b/grub-core/kern/i386/qemu/mmap.c
new file mode 100644
index 0000000..f449637
--- /dev/null
+++ b/grub-core/kern/i386/qemu/mmap.c
@@ -0,0 +1,107 @@
+/*
+ *  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/i386/memory.h>
+#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>
+#include <grub/offsets.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 (void)
+{
+  grub_uint8_t high, low, b, c, d;
+  grub_cmos_read (QEMU_CMOS_MEMSIZE_HIGH, &high);
+  grub_cmos_read (QEMU_CMOS_MEMSIZE_LOW, &low);
+  mem_size = ((grub_uint64_t) high) << 24
+    | ((grub_uint64_t) low) << 16;
+  if (mem_size > 0)
+    {
+      /* Don't ask... */
+      mem_size += (16 * 1024 * 1024);
+    }
+  else
+    {
+      grub_cmos_read (QEMU_CMOS_MEMSIZE2_HIGH, &high);
+      grub_cmos_read (QEMU_CMOS_MEMSIZE2_LOW, &low);
+      mem_size
+	= ((((grub_uint64_t) high) << 18) | (((grub_uint64_t) low) << 10))
+	+ 1024 * 1024;
+    }
+
+  grub_cmos_read (0x5b, &b);
+  grub_cmos_read (0x5c, &c);
+  grub_cmos_read (0x5d, &d);
+  above_4g = (((grub_uint64_t) b) << 16)
+    | (((grub_uint64_t) c) << 24)
+    | (((grub_uint64_t) d) << 32);
+}
+
+grub_err_t
+grub_machine_mmap_iterate (grub_memory_hook_t hook, void *hook_data)
+{
+  if (hook (0x0,
+	    (grub_addr_t) _start,
+	    GRUB_MEMORY_AVAILABLE, hook_data))
+    return 1;
+
+  if (hook ((grub_addr_t) _end,
+           0xa0000 - (grub_addr_t) _end,
+           GRUB_MEMORY_AVAILABLE, hook_data))
+    return 1;
+
+  if (hook (GRUB_MEMORY_MACHINE_UPPER,
+	    0x100000 - GRUB_MEMORY_MACHINE_UPPER,
+	    GRUB_MEMORY_RESERVED, hook_data))
+    return 1;
+
+  /* Everything else is free.  */
+  if (hook (0x100000,
+	    min (mem_size, (grub_uint32_t) -GRUB_BOOT_MACHINE_SIZE) - 0x100000,
+	    GRUB_MEMORY_AVAILABLE, hook_data))
+    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_MEMORY_RESERVED, hook_data))
+    return 1;
+
+  if (above_4g != 0 && hook (0x100000000ULL, above_4g,
+			     GRUB_MEMORY_AVAILABLE, hook_data))
+    return 1;
+
+  return 0;
+}
diff --git a/grub-core/kern/i386/qemu/startup.S b/grub-core/kern/i386/qemu/startup.S
new file mode 100644
index 0000000..0d89858
--- /dev/null
+++ b/grub-core/kern/i386/qemu/startup.S
@@ -0,0 +1,75 @@
+/*
+ *  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
+
+	.org GRUB_KERNEL_I386_QEMU_CORE_ENTRY_ADDR
+VARIABLE(grub_core_entry_addr)
+	.long	0
+
+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
+
+	movl    $(_edata - _start), %ecx
+	movl	$_start, %edi
+	cld
+	rep
+	movsb
+	ljmp	$GRUB_MEMORY_MACHINE_PROT_MODE_CSEG, $1f
+1:
+
+	/* clean out the bss */
+	movl	$BSS_START_SYMBOL, %edi
+
+	/* compute the bss length */
+	movl	$END_SYMBOL, %ecx
+	subl	%edi, %ecx
+		
+	/* 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
diff --git a/grub-core/kern/i386/realmode.S b/grub-core/kern/i386/realmode.S
new file mode 100644
index 0000000..265cdcb
--- /dev/null
+++ b/grub-core/kern/i386/realmode.S
@@ -0,0 +1,281 @@
+/*
+ *  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/machine/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.
+ */
+
+protstack:
+	.long	GRUB_MEMORY_MACHINE_PROT_STACK
+
+	.macro PROT_TO_REAL
+	call	prot_to_real
+	.endm
+
+	.macro REAL_TO_PROT
+	calll	real_to_prot
+	.endm
+
+/*
+ * 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	5	/* force 32-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
+
+
+	.p2align 5
+/* this is the GDT descriptor */
+gdtdesc:
+	.word	0x27			/* limit */
+	.long	gdt			/* addr */
+LOCAL(realidt):
+	.word 0x400
+	.long 0
+protidt:
+	.word 0
+	.long 0
+
+/*
+ *  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
+#ifdef GRUB_MACHINE_QEMU
+	/*
+	qemu is special: gdtdesc is in ROM.
+	%cs = 0xf000
+	_start + GRUB_BOOT_MACHINE_SIZE = 0x100000
+	So
+	_start + GRUB_BOOT_MACHINE_SIZE - 0x10000 points to the same point
+	as %cs.
+	gdtdesc - (_start + GRUB_BOOT_MACHINE_SIZE - 0x10000)
+	= gdtdesc - _start - GRUB_BOOT_MACHINE_SIZE + 0x10000
+	but the later can be computed by assembly.
+	*/
+	lgdtl	%cs:(gdtdesc - _start - GRUB_BOOT_MACHINE_SIZE + 0x10000)
+#else
+	lgdtl	gdtdesc
+#endif
+
+	/* 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 */
+	ljmpl	$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
+
+	sidt LOCAL(realidt)
+	lidt protidt
+
+	/* return on the old (or initialized) stack! */
+	ret
+	/* prot_to_real assumes that this code is under 64K which is not
+	true for qemu.  */
+#ifndef GRUB_MACHINE_QEMU
+/*
+ *  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/>.
+ */
+
+prot_to_real:
+	/* just in case, set GDT */
+	lgdt	gdtdesc
+
+	sidt    protidt
+	lidt    LOCAL(realidt)
+
+	/* 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 */
+	ljmpl	$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! */
+	retl
+#endif
+	.code32
diff --git a/grub-core/kern/i386/tsc.c b/grub-core/kern/i386/tsc.c
new file mode 100644
index 0000000..9293b16
--- /dev/null
+++ b/grub-core/kern/i386/tsc.c
@@ -0,0 +1,78 @@
+/* kern/i386/tsc.c - x86 TSC time source implementation
+ * Requires Pentium or better x86 CPU that supports the RDTSC instruction.
+ * This module calibrates 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/cpuid.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 ms per 2^32 ticks) */
+/* We assume that the tick is less than 1 ms and hence this value fits
+   in 32-bit.  */
+grub_uint32_t grub_tsc_rate;
+
+static grub_uint64_t
+grub_tsc_get_time_ms (void)
+{
+  grub_uint64_t a = grub_get_tsc () - tsc_boot_time;
+  grub_uint64_t ah = a >> 32;
+  grub_uint64_t al = a & 0xffffffff;
+
+  return ((al * grub_tsc_rate) >> 32) + ah * grub_tsc_rate;
+}
+
+static int
+calibrate_tsc_hardcode (void)
+{
+  grub_tsc_rate = 5368;/* 800 MHz */
+  return 1;
+}
+
+void
+grub_tsc_init (void)
+{
+  if (!grub_cpu_is_tsc_supported ())
+    {
+#if defined (GRUB_MACHINE_PCBIOS) || defined (GRUB_MACHINE_IEEE1275)
+      grub_install_get_time_ms (grub_rtc_get_time_ms);
+#else
+      grub_fatal ("no TSC found");
+#endif
+      return;
+    }
+
+  tsc_boot_time = grub_get_tsc ();
+
+#if defined (GRUB_MACHINE_XEN) || defined (GRUB_MACHINE_XEN_PVH)
+  (void) (grub_tsc_calibrate_from_xen () || calibrate_tsc_hardcode());
+#elif defined (GRUB_MACHINE_EFI)
+  (void) (grub_tsc_calibrate_from_pmtimer () || grub_tsc_calibrate_from_pit () || grub_tsc_calibrate_from_efi() || calibrate_tsc_hardcode());
+#elif defined (GRUB_MACHINE_COREBOOT)
+  (void) (grub_tsc_calibrate_from_pmtimer () || grub_tsc_calibrate_from_pit () || calibrate_tsc_hardcode());
+#else
+  (void) (grub_tsc_calibrate_from_pit () || calibrate_tsc_hardcode());
+#endif
+  grub_install_get_time_ms (grub_tsc_get_time_ms);
+}
diff --git a/grub-core/kern/i386/tsc_pit.c b/grub-core/kern/i386/tsc_pit.c
new file mode 100644
index 0000000..67990bf
--- /dev/null
+++ b/grub-core/kern/i386/tsc_pit.c
@@ -0,0 +1,84 @@
+/* kern/i386/tsc.c - x86 TSC time source implementation
+ * Requires Pentium or better x86 CPU that supports the RDTSC instruction.
+ * This module uses the PIT 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>
+#include <grub/cpu/io.h>
+
+static int
+grub_pit_wait (void)
+{
+  int ret = 0;
+
+  /* Disable timer2 gate and speaker.  */
+  grub_outb (grub_inb (GRUB_PIT_SPEAKER_PORT)
+	     & ~ (GRUB_PIT_SPK_DATA | GRUB_PIT_SPK_TMR2),
+             GRUB_PIT_SPEAKER_PORT);
+
+  /* Set tics.  */
+  grub_outb (GRUB_PIT_CTRL_SELECT_2 | GRUB_PIT_CTRL_READLOAD_WORD,
+	     GRUB_PIT_CTRL);
+  /* 0xffff ticks: 55ms. */
+  grub_outb (0xff, GRUB_PIT_COUNTER_2);
+  grub_outb (0xff, GRUB_PIT_COUNTER_2);
+
+  /* Enable timer2 gate, keep speaker disabled.  */
+  grub_outb ((grub_inb (GRUB_PIT_SPEAKER_PORT) & ~ GRUB_PIT_SPK_DATA)
+	     | GRUB_PIT_SPK_TMR2,
+             GRUB_PIT_SPEAKER_PORT);
+
+  if ((grub_inb (GRUB_PIT_SPEAKER_PORT) & GRUB_PIT_SPK_TMR2_LATCH) == 0x00) {
+    ret = 1;
+    /* Wait.  */
+    while ((grub_inb (GRUB_PIT_SPEAKER_PORT) & GRUB_PIT_SPK_TMR2_LATCH) == 0x00);
+  }
+
+  /* Disable timer2 gate and speaker.  */
+  grub_outb (grub_inb (GRUB_PIT_SPEAKER_PORT)
+	     & ~ (GRUB_PIT_SPK_DATA | GRUB_PIT_SPK_TMR2),
+             GRUB_PIT_SPEAKER_PORT);
+
+  return ret;
+}
+
+/* Calibrate the TSC based on the RTC.  */
+int
+grub_tsc_calibrate_from_pit (void)
+{
+  /* First calibrate the TSC rate (relative, not absolute time). */
+  grub_uint64_t start_tsc, end_tsc;
+
+  start_tsc = grub_get_tsc ();
+  if (!grub_pit_wait ())
+    return 0;
+  end_tsc = grub_get_tsc ();
+
+  grub_tsc_rate = 0;
+  if (end_tsc > start_tsc)
+    grub_tsc_rate = grub_divmod64 ((55ULL << 32), end_tsc - start_tsc, 0);
+  if (grub_tsc_rate == 0)
+    return 0;
+  return 1;
+}
diff --git a/grub-core/kern/i386/tsc_pmtimer.c b/grub-core/kern/i386/tsc_pmtimer.c
new file mode 100644
index 0000000..c9c3616
--- /dev/null
+++ b/grub-core/kern/i386/tsc_pmtimer.c
@@ -0,0 +1,88 @@
+/* kern/i386/tsc.c - x86 TSC time source implementation
+ * Requires Pentium or better x86 CPU that supports the RDTSC instruction.
+ * This module uses the PIT 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/pmtimer.h>
+#include <grub/acpi.h>
+#include <grub/cpu/io.h>
+
+grub_uint64_t
+grub_pmtimer_wait_count_tsc (grub_port_t pmtimer,
+			     grub_uint16_t num_pm_ticks)
+{
+  grub_uint32_t start;
+  grub_uint32_t last;
+  grub_uint32_t cur, end;
+  grub_uint64_t start_tsc;
+  grub_uint64_t end_tsc;
+  int num_iter = 0;
+
+  start = grub_inl (pmtimer) & 0xffffff;
+  last = start;
+  end = start + num_pm_ticks;
+  start_tsc = grub_get_tsc ();
+  while (1)
+    {
+      cur = grub_inl (pmtimer) & 0xffffff;
+      if (cur < last)
+	cur |= 0x1000000;
+      num_iter++;
+      if (cur >= end)
+	{
+	  end_tsc = grub_get_tsc ();
+	  return end_tsc - start_tsc;
+	}
+      /* Check for broken PM timer.
+	 50000000 TSCs is between 5 ms (10GHz) and 200 ms (250 MHz)
+	 if after this time we still don't have 1 ms on pmtimer, then
+	 pmtimer is broken.
+       */
+      if ((num_iter & 0xffffff) == 0 && grub_get_tsc () - start_tsc > 5000000) {
+	return 0;
+      }
+    }
+}
+
+int
+grub_tsc_calibrate_from_pmtimer (void)
+{
+  struct grub_acpi_fadt *fadt;
+  grub_port_t pmtimer;
+  grub_uint64_t tsc_diff;
+
+  fadt = grub_acpi_find_fadt ();
+  if (!fadt)
+    return 0;
+  pmtimer = fadt->pmtimer;
+  if (!pmtimer)
+    return 0;
+
+  /* It's 3.579545 MHz clock. Wait 1 ms.  */
+  tsc_diff = grub_pmtimer_wait_count_tsc (pmtimer, 3580);
+  if (tsc_diff == 0)
+    return 0;
+  grub_tsc_rate = grub_divmod64 ((1ULL << 32), tsc_diff, 0);
+  return 1;
+}
diff --git a/grub-core/kern/i386/xen/hypercall.S b/grub-core/kern/i386/xen/hypercall.S
new file mode 100644
index 0000000..09d75c3
--- /dev/null
+++ b/grub-core/kern/i386/xen/hypercall.S
@@ -0,0 +1,43 @@
+/* hypercall.S - wrappers for Xen hypercalls */
+/*
+ *  GRUB  --  GRand Unified Bootloader
+ *  Copyright (C) 2013  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/xen.h>
+
+FUNCTION(grub_xen_hypercall)
+	pushl   %ebp
+	movl    %esp, %ebp
+	pushl   %esi
+	pushl   %edi
+	pushl   %ebx
+
+	/* call number already in %eax. */
+	/* %edx -> %ebx*/
+	/* %ecx -> %ecx*/
+	movl   %edx,  %ebx
+	movl    8(%ebp), %edx
+	movl    12(%ebp), %esi
+	movl    16(%ebp), %edi
+	movl    20(%ebp), %ebp
+	int     $0x82
+	popl   %ebx
+	popl   %edi
+	popl   %esi
+	popl   %ebp
+	ret
diff --git a/grub-core/kern/i386/xen/pvh.c b/grub-core/kern/i386/xen/pvh.c
new file mode 100644
index 0000000..91fbca8
--- /dev/null
+++ b/grub-core/kern/i386/xen/pvh.c
@@ -0,0 +1,369 @@
+/*
+ *  GRUB  --  GRand Unified Bootloader
+ *  Copyright (C) 2018  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/misc.h>
+#include <grub/memory.h>
+#include <grub/mm.h>
+#include <grub/i386/cpuid.h>
+#include <grub/i386/io.h>
+#include <grub/xen.h>
+#include <xen/hvm/start_info.h>
+#include <grub/i386/linux.h>
+#include <grub/machine/kernel.h>
+#include <grub/machine/memory.h>
+#include <xen/hvm/params.h>
+#include <xen/memory.h>
+
+#define XEN_MEMORY_MAP_SIZE   128
+
+grub_uint64_t grub_rsdp_addr;
+
+static char hypercall_page[GRUB_XEN_PAGE_SIZE]
+  __attribute__ ((aligned (GRUB_XEN_PAGE_SIZE)));
+
+static grub_uint32_t xen_cpuid_base;
+static struct start_info grub_xen_start_page;
+static struct grub_e820_mmap_entry map[XEN_MEMORY_MAP_SIZE];
+static unsigned int nr_map_entries;
+
+static void
+grub_xen_cons_msg (const char *msg)
+{
+  const char *c;
+
+  for (c = msg; *c; c++)
+    grub_outb (*c, XEN_HVM_DEBUGCONS_IOPORT);
+}
+
+static void
+grub_xen_panic (const char *msg)
+{
+  grub_xen_cons_msg (msg);
+  grub_xen_cons_msg ("System halted!\n");
+
+  asm volatile ("cli");
+
+  while (1)
+    {
+      asm volatile ("hlt");
+    }
+}
+
+static void
+grub_xen_cpuid_base (void)
+{
+  grub_uint32_t base, eax, signature[3];
+
+  for (base = 0x40000000; base < 0x40010000; base += 0x100)
+    {
+      grub_cpuid (base, eax, signature[0], signature[1], signature[2]);
+      if (!grub_memcmp ("XenVMMXenVMM", signature, 12) && (eax - base) >= 2)
+	{
+	  xen_cpuid_base = base;
+	  return;
+	}
+    }
+
+  grub_xen_panic ("Found no Xen signature!\n");
+}
+
+static void
+grub_xen_setup_hypercall_page (void)
+{
+  grub_uint32_t msr, addr, eax, ebx, ecx, edx;
+
+  /* Get base address of Xen-specific MSRs. */
+  grub_cpuid (xen_cpuid_base + 2, eax, ebx, ecx, edx);
+  msr = ebx;
+  addr = (grub_uint32_t) (&hypercall_page);
+
+  /* Specify hypercall page address for Xen. */
+  asm volatile ("wrmsr" : : "c" (msr), "a" (addr), "d" (0) : "memory");
+}
+
+int
+grub_xen_hypercall (grub_uint32_t callno, grub_uint32_t a0,
+		    grub_uint32_t a1, grub_uint32_t a2,
+		    grub_uint32_t a3, grub_uint32_t a4,
+		    grub_uint32_t a5 __attribute__ ((unused)))
+{
+  grub_uint32_t res;
+
+  asm volatile ("call *%[callno]"
+		: "=a" (res), "+b" (a0), "+c" (a1), "+d" (a2),
+		  "+S" (a3), "+D" (a4)
+		: [callno] "a" (&hypercall_page[callno * 32])
+		: "memory");
+  return res;
+}
+
+static grub_uint32_t
+grub_xen_get_param (int idx)
+{
+  struct xen_hvm_param xhv;
+  int r;
+
+  xhv.domid = DOMID_SELF;
+  xhv.index = idx;
+  r = grub_xen_hypercall (__HYPERVISOR_hvm_op, HVMOP_get_param,
+			  (grub_uint32_t) (&xhv), 0, 0, 0, 0);
+  if (r < 0)
+    grub_xen_panic ("Could not get parameter from Xen!\n");
+  return xhv.value;
+}
+
+static void *
+grub_xen_add_physmap (unsigned int space, void *addr)
+{
+  struct xen_add_to_physmap xatp;
+
+  xatp.domid = DOMID_SELF;
+  xatp.idx = 0;
+  xatp.space = space;
+  xatp.gpfn = (grub_addr_t) addr >> GRUB_XEN_LOG_PAGE_SIZE;
+  if (grub_xen_hypercall (__HYPERVISOR_memory_op, XENMEM_add_to_physmap,
+			  (grub_uint32_t) (&xatp), 0, 0, 0, 0))
+    grub_xen_panic ("Memory_op hypercall failed!\n");
+  return addr;
+}
+
+static void
+grub_xen_sort_mmap (void)
+{
+  grub_uint64_t from, to;
+  unsigned int i;
+  struct grub_e820_mmap_entry tmp;
+
+  /* Align map entries to page boundaries. */
+  for (i = 0; i < nr_map_entries; i++)
+    {
+      from = map[i].addr;
+      to = from + map[i].len;
+      if (map[i].type == GRUB_MEMORY_AVAILABLE)
+	{
+	  from = ALIGN_UP (from, GRUB_XEN_PAGE_SIZE);
+	  to = ALIGN_DOWN (to, GRUB_XEN_PAGE_SIZE);
+	}
+      else
+	{
+	  from = ALIGN_DOWN (from, GRUB_XEN_PAGE_SIZE);
+	  to = ALIGN_UP (to, GRUB_XEN_PAGE_SIZE);
+	}
+      map[i].addr = from;
+      map[i].len = to - from;
+    }
+
+ again:
+  /* Sort entries by start address. */
+  for (i = 1; i < nr_map_entries; i++)
+    {
+      if (map[i].addr >= map[i - 1].addr)
+	continue;
+      tmp = map[i];
+      map[i] = map[i - 1];
+      map[i - 1] = tmp;
+      i = 0;
+    }
+
+  /* Detect overlapping areas. */
+  for (i = 1; i < nr_map_entries; i++)
+    {
+      if (map[i].addr >= map[i - 1].addr + map[i - 1].len)
+	continue;
+      tmp = map[i - 1];
+      map[i - 1].len = map[i].addr - map[i - 1].addr;
+      if (map[i].addr + map[i].len >= tmp.addr + tmp.len)
+	continue;
+      if (nr_map_entries < ARRAY_SIZE (map))
+	{
+	  map[nr_map_entries].addr = map[i].addr + map[i].len;
+	  map[nr_map_entries].len = tmp.addr + tmp.len - map[nr_map_entries].addr;
+	  map[nr_map_entries].type = tmp.type;
+	  nr_map_entries++;
+	  goto again;
+	}
+    }
+
+  /* Merge adjacent entries. */
+  for (i = 1; i < nr_map_entries; i++)
+    {
+      if (map[i].type == map[i - 1].type &&
+	  map[i].addr == map[i - 1].addr + map[i - 1].len)
+	{
+	  map[i - 1].len += map[i].len;
+	  map[i] = map[nr_map_entries - 1];
+	  nr_map_entries--;
+	  goto again;
+	}
+    }
+}
+
+static void
+grub_xen_get_mmap (void)
+{
+  struct xen_memory_map memmap;
+
+  memmap.nr_entries = ARRAY_SIZE (map);
+  set_xen_guest_handle (memmap.buffer, map);
+  if (grub_xen_hypercall (__HYPERVISOR_memory_op, XENMEM_memory_map,
+			  (grub_uint32_t) (&memmap), 0, 0, 0, 0))
+    grub_xen_panic ("Could not get memory map from Xen!\n");
+  nr_map_entries = memmap.nr_entries;
+
+  grub_xen_sort_mmap ();
+}
+
+static void
+grub_xen_set_mmap (void)
+{
+  struct xen_foreign_memory_map memmap;
+
+  memmap.domid = DOMID_SELF;
+  memmap.map.nr_entries = nr_map_entries;
+  set_xen_guest_handle (memmap.map.buffer, map);
+  grub_xen_hypercall (__HYPERVISOR_memory_op, XENMEM_set_memory_map,
+		      (grub_uint32_t) (&memmap), 0, 0, 0, 0);
+}
+
+static void
+grub_xen_mm_init_regions (void)
+{
+  grub_uint64_t modend, from, to;
+  unsigned int i;
+
+  modend = grub_modules_get_end ();
+
+  for (i = 0; i < nr_map_entries; i++)
+    {
+      if (map[i].type != GRUB_MEMORY_AVAILABLE)
+        continue;
+      from = map[i].addr;
+      to = from + map[i].len;
+      if (from < modend)
+        from = modend;
+      if (from >= to || from >= (1ULL << 32))
+        continue;
+      if (to > (1ULL << 32))
+        to = 1ULL << 32;
+      grub_mm_init_region ((void *) (grub_addr_t) from, to - from);
+    }
+}
+
+static grub_uint64_t
+grub_xen_find_page (grub_uint64_t start)
+{
+  unsigned int i, j;
+  grub_uint64_t last = start;
+
+  /*
+   * Try to find a e820 map hole below 4G.
+   * Relies on page-aligned entries (addr and len) and input (start).
+   */
+
+  for (i = 0; i < nr_map_entries; i++)
+    {
+      if (last > map[i].addr + map[i].len)
+	continue;
+      if (last < map[i].addr)
+	return last;
+      if ((map[i].addr >> 32) || ((map[i].addr + map[i].len) >> 32))
+	break;
+      last = map[i].addr + map[i].len;
+    }
+    if (i == nr_map_entries)
+      return last;
+
+  /* No hole found, use the highest RAM page below 4G and reserve it. */
+  if (nr_map_entries == ARRAY_SIZE (map))
+    grub_xen_panic ("Memory map size limit reached!\n");
+  for (i = 0, j = 0; i < nr_map_entries; i++)
+    {
+      if (map[i].type != GRUB_MEMORY_AVAILABLE)
+	continue;
+      if (map[i].addr >> 32)
+	break;
+      j = i;
+      if ((map[i].addr + map[i].len) >> 32)
+	break;
+    }
+  if (map[j].type != GRUB_MEMORY_AVAILABLE)
+    grub_xen_panic ("No free memory page found!\n");
+  if ((map[j].addr + map[j].len) >> 32)
+    last = (1ULL << 32) - GRUB_XEN_PAGE_SIZE;
+  else
+    last = map[j].addr + map[j].len - GRUB_XEN_PAGE_SIZE;
+  map[nr_map_entries].addr = last;
+  map[nr_map_entries].len = GRUB_XEN_PAGE_SIZE;
+  map[nr_map_entries].type = GRUB_MEMORY_RESERVED;
+  nr_map_entries++;
+  grub_xen_sort_mmap ();
+
+  return last;
+}
+
+void
+grub_xen_setup_pvh (void)
+{
+  grub_addr_t par;
+
+  grub_xen_cpuid_base ();
+  grub_xen_setup_hypercall_page ();
+  grub_xen_get_mmap ();
+
+  /* Setup Xen data. */
+  grub_xen_start_page_addr = &grub_xen_start_page;
+
+  par = grub_xen_get_param (HVM_PARAM_CONSOLE_PFN);
+  grub_xen_start_page_addr->console.domU.mfn = par;
+  grub_xen_xcons = (void *) (grub_addr_t) (par << GRUB_XEN_LOG_PAGE_SIZE);
+  par = grub_xen_get_param (HVM_PARAM_CONSOLE_EVTCHN);
+  grub_xen_start_page_addr->console.domU.evtchn = par;
+
+  par = grub_xen_get_param (HVM_PARAM_STORE_PFN);
+  grub_xen_start_page_addr->store_mfn = par;
+  grub_xen_xenstore = (void *) (grub_addr_t) (par << GRUB_XEN_LOG_PAGE_SIZE);
+  par = grub_xen_get_param (HVM_PARAM_STORE_EVTCHN);
+  grub_xen_start_page_addr->store_evtchn = par;
+
+  par = grub_xen_find_page (0);
+  grub_xen_grant_table = grub_xen_add_physmap (XENMAPSPACE_grant_table,
+					       (void *) par);
+  par = grub_xen_find_page (par + GRUB_XEN_PAGE_SIZE);
+  grub_xen_shared_info = grub_xen_add_physmap (XENMAPSPACE_shared_info,
+					       (void *) par);
+  grub_xen_set_mmap ();
+
+  grub_xen_mm_init_regions ();
+
+  grub_rsdp_addr = pvh_start_info->rsdp_paddr;
+}
+
+grub_err_t
+grub_machine_mmap_iterate (grub_memory_hook_t hook, void *hook_data)
+{
+  unsigned int i;
+
+  for (i = 0; i < nr_map_entries; i++)
+    {
+      if (map[i].len && hook (map[i].addr, map[i].len, map[i].type, hook_data))
+        break;
+    }
+
+  return GRUB_ERR_NONE;
+}
diff --git a/grub-core/kern/i386/xen/startup.S b/grub-core/kern/i386/xen/startup.S
new file mode 100644
index 0000000..fbe8300
--- /dev/null
+++ b/grub-core/kern/i386/xen/startup.S
@@ -0,0 +1,38 @@
+/* startup.S - bootstrap GRUB itself */
+/*
+ *  GRUB  --  GRand Unified Bootloader
+ *  Copyright (C) 2013  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>
+
+        .file   "startup.S"
+        .text
+        .globl  start, _start
+        .code32
+
+start:
+_start:
+	leal	LOCAL(stack_end), %esp
+	movl	%esi, EXT_C(grub_xen_start_page_addr)
+
+	call	EXT_C(grub_main)
+	/* Doesn't return.  */
+
+	.bss
+	.space (1 << 22)
+LOCAL(stack_end):	
diff --git a/grub-core/kern/i386/xen/startup_pvh.S b/grub-core/kern/i386/xen/startup_pvh.S
new file mode 100644
index 0000000..363c318
--- /dev/null
+++ b/grub-core/kern/i386/xen/startup_pvh.S
@@ -0,0 +1,81 @@
+/* startup.S - bootstrap GRUB itself */
+/*
+ *  GRUB  --  GRand Unified Bootloader
+ *  Copyright (C) 2018  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>
+
+	.file	"startup_pvh.S"
+	.text
+	.globl	start, _start
+	.code32
+
+start:
+_start:
+	cld
+	lgdt	gdtdesc
+	ljmp	$GRUB_MEMORY_MACHINE_PROT_MODE_CSEG, $1f
+1:
+	movl	$GRUB_MEMORY_MACHINE_PROT_MODE_DSEG, %eax
+	mov	%eax, %ds
+	mov	%eax, %es
+	mov	%eax, %fs
+	mov	%eax, %gs
+	mov	%eax, %ss
+	leal	LOCAL(stack_end), %esp
+
+	/* Save address of start info structure. */
+	mov	%ebx, pvh_start_info
+	call	EXT_C(grub_main)
+	/* Doesn't return. */
+
+	.p2align	3
+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
+
+	.p2align	3
+/* this is the GDT descriptor */
+gdtdesc:
+	.word	0x17		/* limit */
+	.long	gdt		/* addr */
+
+	.p2align	2
+/* Saved pointer to start info structure. */
+	.globl	pvh_start_info
+pvh_start_info:
+	.long	0
+
+	.bss
+	.space	GRUB_MEMORY_MACHINE_PROT_STACK_SIZE
+LOCAL(stack_end):
diff --git a/grub-core/kern/i386/xen/tsc.c b/grub-core/kern/i386/xen/tsc.c
new file mode 100644
index 0000000..8792b30
--- /dev/null
+++ b/grub-core/kern/i386/xen/tsc.c
@@ -0,0 +1,40 @@
+/* kern/i386/tsc.c - x86 TSC time source implementation
+ * Requires Pentium or better x86 CPU that supports the RDTSC instruction.
+ * This module uses the PIT 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/xen.h>
+
+int
+grub_tsc_calibrate_from_xen (void)
+{
+  grub_uint64_t t;
+  t = grub_xen_shared_info->vcpu_info[0].time.tsc_to_system_mul;
+  if (grub_xen_shared_info->vcpu_info[0].time.tsc_shift > 0)
+    t <<= grub_xen_shared_info->vcpu_info[0].time.tsc_shift;
+  else
+    t >>= -grub_xen_shared_info->vcpu_info[0].time.tsc_shift;
+  grub_tsc_rate = grub_divmod64 (t, 1000000, 0);
+  return 1;
+}