[RFC] New port to arm64-efi

Message ID 1384432539-7696-1-git-send-email-leif.lindholm@linaro.org
State New
Headers show

Commit Message

Leif Lindholm Nov. 14, 2013, 12:35 p.m.
This patch brings support for UEFI on the 64-bit ARM architecture.
It does not yet include a Linux loader, as the boot protocol for
UEFI platforms is not yet fully agreed. The chainloader can be used
to load a kernel with an integrated UEFI stub loader.

Instructions for how to build and set up UEFI on the ARM Foundation
Model (registration required) can be found at:
http://sourceforge.net/apps/mediawiki/tianocore/index.php?title=ArmPlatformPkg/AArch64

It depends on Vladimir's __ctz[sd]i2 implementation, without which
grub-mkimage will fail with a "missing symbol" error.

Signed-off-by: Leif Lindholm <leif.lindholm@linaro.org>

---
 ChangeLog                          |    4 +
 Makefile.util.def                  |    1 +
 conf/Makefile.common               |    3 +
 configure.ac                       |    8 ++
 gentpl.py                          |    7 +-
 grub-core/Makefile.am              |    5 +
 grub-core/Makefile.core.def        |   14 +++
 grub-core/kern/arm64/cache.c       |   40 ++++++++
 grub-core/kern/arm64/cache_flush.S |   74 ++++++++++++++
 grub-core/kern/arm64/dl.c          |  199 ++++++++++++++++++++++++++++++++++++
 grub-core/kern/arm64/dl_helper.c   |   72 +++++++++++++
 grub-core/kern/arm64/efi/startup.S |   34 ++++++
 grub-core/lib/arm64/setjmp.S       |   53 ++++++++++
 grub-core/lib/efi/halt.c           |    2 +-
 grub-core/lib/setjmp.S             |    2 +
 include/grub/arm64/efi/memory.h    |    1 +
 include/grub/arm64/reloc.h         |   24 +++++
 include/grub/arm64/setjmp.h        |   27 +++++
 include/grub/arm64/time.h          |   29 ++++++
 include/grub/arm64/types.h         |   34 ++++++
 include/grub/efi/api.h             |    3 +-
 include/grub/efi/pe32.h            |    1 +
 include/grub/elf.h                 |   16 +++
 util/grub-install.in               |    6 ++
 util/grub-mkimagexx.c              |   59 ++++++++++-
 util/mkimage.c                     |   17 +++
 26 files changed, 728 insertions(+), 7 deletions(-)
 create mode 100644 grub-core/kern/arm64/cache.c
 create mode 100644 grub-core/kern/arm64/cache_flush.S
 create mode 100644 grub-core/kern/arm64/dl.c
 create mode 100644 grub-core/kern/arm64/dl_helper.c
 create mode 100644 grub-core/kern/arm64/efi/startup.S
 create mode 100644 grub-core/lib/arm64/setjmp.S
 create mode 100644 include/grub/arm64/efi/memory.h
 create mode 100644 include/grub/arm64/reloc.h
 create mode 100644 include/grub/arm64/setjmp.h
 create mode 100644 include/grub/arm64/time.h
 create mode 100644 include/grub/arm64/types.h

Patch hide | download patch | download mbox

diff --git a/ChangeLog b/ChangeLog
index d68b33a..35e32f1 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,7 @@ 
+2013-11-14  Leif Lindholm <leif.lindholm@linaro.org>
+
+	* New port to arm64-efi.
+
 2013-11-13  Colin Watson  <cjwatson@ubuntu.com>
 
 	* grub-core/osdep/unix/emuconsole.c (put): Pacify the compiler on
diff --git a/Makefile.util.def b/Makefile.util.def
index 59e3e73..e5ba9fa 100644
--- a/Makefile.util.def
+++ b/Makefile.util.def
@@ -173,6 +173,7 @@  program = {
   common = grub-core/osdep/init.c;
 
   common = grub-core/kern/arm/dl_helper.c;
+  common = grub-core/kern/arm64/dl_helper.c;
 
   extra_dist = util/grub-mkimagexx.c;
 
diff --git a/conf/Makefile.common b/conf/Makefile.common
index 0dc26db..bdb32d6 100644
--- a/conf/Makefile.common
+++ b/conf/Makefile.common
@@ -22,6 +22,9 @@  if COND_arm
   CFLAGS_PLATFORM += -mthumb-interwork -mlong-calls
   LDFLAGS_PLATFORM = -Wl,--wrap=__clear_cache
 endif
+if COND_arm64
+  CFLAGS_PLATFORM += -mcmodel=large
+endif
 
 #FIXME: discover and check XEN headers
 CPPFLAGS_XEN = -I/usr/include
diff --git a/configure.ac b/configure.ac
index d76cef0..2ee2d72 100644
--- a/configure.ac
+++ b/configure.ac
@@ -103,6 +103,9 @@  case "$target_cpu" in
   arm*)
 		target_cpu=arm;
 		;;
+  aarch64*)
+		target_cpu=arm64;
+		;;
 esac
 
 # Specify the platform (such as firmware).
@@ -124,6 +127,7 @@  if test "x$with_platform" = x; then
     mips-*) platform=arc ;;
     ia64-*) platform=efi ;;
     arm-*) platform=uboot ;;
+    arm64-*) platform=efi ;;
     *) AC_MSG_ERROR([unsupported CPU: "$target_cpu"]) ;;
   esac
 else
@@ -164,6 +168,7 @@  case "$target_cpu"-"$platform" in
   mipsel-loongson) ;;
   arm-uboot) ;;
   arm-efi) ;;
+  arm64-efi) ;;
   *-emu) ;;
   *) AC_MSG_ERROR([platform "$platform" is not supported for target CPU "$target_cpu"]) ;;
 esac
@@ -208,6 +213,7 @@  case "$platform" in
 esac
 case "$target_cpu" in
   arm)      	machine_CPPFLAGS="$machine_CPPFLAGS -DGRUB_MACHINE_ARM=1" ;;
+  arm64)      	machine_CPPFLAGS="$machine_CPPFLAGS -DGRUB_MACHINE_ARM64=1" ;;
   mips |mipsel)      	machine_CPPFLAGS="$machine_CPPFLAGS -DGRUB_MACHINE_MIPS=1" ;;
   sparc64)      machine_CPPFLAGS="$machine_CPPFLAGS -DGRUB_MACHINE_SPARC64=1" ;;
 esac
@@ -1435,6 +1441,8 @@  AM_CONDITIONAL([COND_mipseb], [test x$target_cpu = xmips])
 AM_CONDITIONAL([COND_arm], [test x$target_cpu = xarm ])
 AM_CONDITIONAL([COND_arm_uboot], [test x$target_cpu = xarm -a x$platform = xuboot])
 AM_CONDITIONAL([COND_arm_efi], [test x$target_cpu = xarm -a x$platform = xefi])
+AM_CONDITIONAL([COND_arm64], [test x$target_cpu = xarm64 ])
+AM_CONDITIONAL([COND_arm64_efi], [test x$target_cpu = xarm64 -a x$platform = xefi])
 
 AM_CONDITIONAL([COND_HOST_HURD], [test x$host_kernel = xhurd])
 AM_CONDITIONAL([COND_HOST_LINUX], [test x$host_kernel = xlinux])
diff --git a/gentpl.py b/gentpl.py
index 825739d..5089d62 100644
--- a/gentpl.py
+++ b/gentpl.py
@@ -24,7 +24,7 @@  GRUB_PLATFORMS = [ "emu", "i386_pc", "i386_efi", "i386_qemu", "i386_coreboot",
                    "i386_xen", "x86_64_xen",
                    "mips_loongson", "sparc64_ieee1275",
                    "powerpc_ieee1275", "mips_arc", "ia64_efi",
-                   "mips_qemu_mips", "arm_uboot", "arm_efi" ]
+                   "mips_qemu_mips", "arm_uboot", "arm_efi", "arm64_efi" ]
 
 GROUPS = {}
 
@@ -38,9 +38,10 @@  GROUPS["mips"]     = [ "mips_loongson", "mips_qemu_mips", "mips_arc" ]
 GROUPS["sparc64"]  = [ "sparc64_ieee1275" ]
 GROUPS["powerpc"]  = [ "powerpc_ieee1275" ]
 GROUPS["arm"]      = [ "arm_uboot", "arm_efi" ]
+GROUPS["arm64"]    = [ "arm64_efi" ]
 
 # Groups based on firmware
-GROUPS["efi"]  = [ "i386_efi", "x86_64_efi", "ia64_efi", "arm_efi" ]
+GROUPS["efi"]  = [ "i386_efi", "x86_64_efi", "ia64_efi", "arm_efi", "arm64_efi" ]
 GROUPS["ieee1275"]   = [ "i386_ieee1275", "sparc64_ieee1275", "powerpc_ieee1275" ]
 GROUPS["uboot"] = [ "arm_uboot" ]
 GROUPS["xen"]  = [ "i386_xen", "x86_64_xen" ]
@@ -66,7 +67,7 @@  GROUPS["terminfomodule"]   = GRUB_PLATFORMS[:];
 for i in GROUPS["terminfoinkernel"]: GROUPS["terminfomodule"].remove(i)
 
 # Flattened Device Trees (FDT)
-GROUPS["fdt"] = [ "arm_uboot", "arm_efi" ]
+GROUPS["fdt"] = [ "arm64_efi", "arm_uboot", "arm_efi" ]
 
 # Miscelaneous groups schedulded to disappear in future
 GROUPS["i386_coreboot_multiboot_qemu"] = ["i386_coreboot", "i386_multiboot", "i386_qemu"]
diff --git a/grub-core/Makefile.am b/grub-core/Makefile.am
index 6c20c7d..61287b0 100644
--- a/grub-core/Makefile.am
+++ b/grub-core/Makefile.am
@@ -234,6 +234,11 @@  KERNEL_HEADER_FILES += $(top_srcdir)/include/grub/efi/efi.h
 KERNEL_HEADER_FILES += $(top_srcdir)/include/grub/efi/disk.h
 endif
 
+if COND_arm64_efi
+KERNEL_HEADER_FILES += $(top_srcdir)/include/grub/efi/efi.h
+KERNEL_HEADER_FILES += $(top_srcdir)/include/grub/efi/disk.h
+endif
+
 if COND_emu
 KERNEL_HEADER_FILES += $(top_srcdir)/include/grub/datetime.h
 KERNEL_HEADER_FILES += $(top_srcdir)/include/grub/emu/misc.h
diff --git a/grub-core/Makefile.core.def b/grub-core/Makefile.core.def
index 6114519..c7dfd90 100644
--- a/grub-core/Makefile.core.def
+++ b/grub-core/Makefile.core.def
@@ -67,6 +67,9 @@  kernel = {
   arm_efi_ldflags          = '-Wl,-r,-d';
   arm_efi_stripflags       = '--strip-unneeded -K start -R .note -R .comment -R .note.gnu.gold-version';
 
+  arm64_efi_ldflags          = '-Wl,-r,-d';
+  arm64_efi_stripflags       = '--strip-unneeded -K start -R .note -R .comment -R .note.gnu.gold-version';
+
   i386_pc_ldflags          = '$(TARGET_IMG_LDFLAGS)';
   i386_pc_ldflags          = '$(TARGET_IMG_BASE_LDOPT),0x9000';
 
@@ -106,6 +109,7 @@  kernel = {
   powerpc_ieee1275_startup = kern/powerpc/ieee1275/startup.S;
   arm_uboot_startup = kern/arm/uboot/startup.S;
   arm_efi_startup = kern/arm/efi/startup.S;
+  arm64_efi_startup = kern/arm64/efi/startup.S;
 
   common = kern/command.c;
   common = kern/corecmd.c;
@@ -194,6 +198,8 @@  kernel = {
   arm_efi = kern/arm/efi/init.c;
   arm_efi = kern/arm/efi/misc.c;
 
+  arm64_efi = kern/arm/efi/init.c;
+
   i386_pc = kern/i386/pc/init.c;
   i386_pc = kern/i386/pc/mmap.c;
   i386_pc = term/i386/pc/console.c;
@@ -254,6 +260,11 @@  kernel = {
   arm = kern/arm/cache.c;
   arm = kern/arm/misc.S;
 
+  arm64 = kern/arm64/cache.c;
+  arm64 = kern/arm64/cache_flush.S;
+  arm64 = kern/arm64/dl.c;
+  arm64 = kern/arm64/dl_helper.c;
+
   emu = disk/host.c;
   emu = kern/emu/cache_s.S;
   emu = kern/emu/hostdisk.c;
@@ -750,6 +761,7 @@  module = {
   enable = mips_arc;
   enable = ia64_efi;
   enable = arm_efi;
+  enable = arm64_efi;
   enable = arm_uboot;
 };
 
@@ -845,6 +857,7 @@  module = {
   ia64_efi = lib/efi/reboot.c;
   x86_64_efi = lib/efi/reboot.c;
   arm_efi = lib/efi/reboot.c;
+  arm64_efi = lib/efi/reboot.c;
   powerpc_ieee1275 = lib/ieee1275/reboot.c;
   sparc64_ieee1275 = lib/ieee1275/reboot.c;
   mips_arc = lib/mips/arc/reboot.c;
@@ -1707,6 +1720,7 @@  module = {
   enable = x86;
   enable = ia64_efi;
   enable = arm_efi;
+  enable = arm64_efi;
   enable = mips;
 };
 
diff --git a/grub-core/kern/arm64/cache.c b/grub-core/kern/arm64/cache.c
new file mode 100644
index 0000000..deea2f8
--- /dev/null
+++ b/grub-core/kern/arm64/cache.c
@@ -0,0 +1,40 @@ 
+#include <grub/cache.h>
+#include <grub/misc.h>
+#include <grub/cpu/system.h>
+
+grub_int64_t grub_arch_cache_dlinesz;
+grub_int64_t grub_arch_cache_ilinesz;
+
+/* Prototypes for asm functions. */
+void grub_arch_sync_caches_real (void *address, grub_size_t len);
+
+static void
+probe_caches (void)
+{
+  grub_uint32_t cache_type;
+
+  /* Read Cache Type Register */
+  asm volatile ("mrs 	%0, ctr_el0": "=r"(cache_type));
+
+  grub_arch_cache_dlinesz = 8 << ((cache_type >> 16) & 0xf);
+  grub_arch_cache_ilinesz = 8 << (cache_type & 0xf);
+
+  grub_dprintf("cache", "D$ line size: %lld\n",
+	       (long long) grub_arch_cache_dlinesz);
+  grub_dprintf("cache", "I$ line size: %lld\n",
+	       (long long) grub_arch_cache_ilinesz);
+}
+
+void
+grub_arch_sync_caches (void *address, grub_size_t len)
+{
+  if (grub_arch_cache_dlinesz == 0)
+    probe_caches();
+  if (grub_arch_cache_dlinesz == 0)
+    grub_fatal ("Unknown cache line size!");
+
+  grub_dprintf("cache", "syncing caches for %p-%lx\n",
+	       address, (grub_addr_t) address + len);
+
+  grub_arch_sync_caches_real (address, len);
+}
diff --git a/grub-core/kern/arm64/cache_flush.S b/grub-core/kern/arm64/cache_flush.S
new file mode 100644
index 0000000..44ca6a6
--- /dev/null
+++ b/grub-core/kern/arm64/cache_flush.S
@@ -0,0 +1,74 @@ 
+/*
+ *  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>
+
+	.file	"cache_flush.S"
+	.text
+
+/*
+ * Simple cache maintenance functions
+ */
+
+// r0 - *beg (inclusive)
+// r1 - *end (exclusive)
+clean_dcache_range:
+	// Clean data cache for range to point-of-unification
+	ldr	x2, =EXT_C(grub_arch_cache_dlinesz)
+	ldr	x2, [x2]
+	sub	x3, x2, #1		// align "beg" to start of line
+	mvn	x3, x3
+	and	x0, x0, x3
+1:	cmp	x0, x1
+	bge	2f
+	dc	cvau, x0		// Clean Virtual Address to PoU
+	add	x0, x0, x2		// Next line
+	b	1b
+2:	dsb	ish
+	ret
+
+// r0 - *beg (inclusive)
+// r1 - *end (exclusive)
+invalidate_icache_range:
+	// Invalidate instruction cache for range to point-of-unification
+	ldr	x2, =EXT_C(grub_arch_cache_ilinesz)
+	ldr	x2, [x2]
+	sub	x3, x2, #1		// align "beg" to start of line
+	mvn	x3, x3
+	and	x0, x0, x3
+1:	cmp	x0, x1
+	bge	2f
+	ic	ivau, x0		// Invalidate Virtual Address to PoU
+	add	x0, x0, x2		// Next line
+	b	1b
+	// Branch predictor invalidation not needed on AArch64
+2:	dsb	ish
+	isb
+	ret
+
+// void grub_arch_sync_caches_real (void *address, grub_size_t len)
+FUNCTION(grub_arch_sync_caches_real)
+	dsb	ish
+	add	x1, x0, x1
+	stp	x0, x30, [sp, #-16]!
+	stp	x0, x1, [sp, #-16]!
+	bl	clean_dcache_range
+	ldp	x0, x1, [sp], #16
+	bl	invalidate_icache_range
+	ldp	x0, x30, [sp], #16
+	ret
diff --git a/grub-core/kern/arm64/dl.c b/grub-core/kern/arm64/dl.c
new file mode 100644
index 0000000..afd0de2
--- /dev/null
+++ b/grub-core/kern/arm64/dl.c
@@ -0,0 +1,199 @@ 
+/* dl.c - arch-dependent part of loadable module support */
+/*
+ *  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/dl.h>
+#include <grub/elf.h>
+#include <grub/misc.h>
+#include <grub/err.h>
+#include <grub/mm.h>
+#include <grub/i18n.h>
+#include <grub/cpu/reloc.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] != ELFCLASS64
+      || e->e_ident[EI_DATA] != ELFDATA2LSB || e->e_machine != EM_AARCH64)
+    return grub_error (GRUB_ERR_BAD_OS,
+		       N_("invalid arch-dependent ELF magic"));
+
+  return GRUB_ERR_NONE;
+}
+
+/*
+ * Unified function for both REL and RELA 
+ */
+static grub_err_t
+do_relX (Elf_Shdr * relhdr, Elf_Ehdr * e, grub_dl_t mod)
+{
+  grub_err_t retval;
+  grub_dl_segment_t segment;
+  Elf_Rel *rel;
+  Elf_Rela *rela;
+  Elf_Sym *symbol;
+  int i, entnum;
+  unsigned long long  entsize;
+
+  /* Find the target segment for this relocation section. */
+  for (segment = mod->segment ; segment != 0 ; segment = segment->next)
+    if (segment->section == relhdr->sh_info)
+      break;
+  if (!segment)
+    return grub_error (GRUB_ERR_EOF, N_("relocation segment not found"));
+
+  rel = (Elf_Rel *) ((grub_addr_t) e + relhdr->sh_offset);
+  rela = (Elf_Rela *) rel;
+  if (relhdr->sh_type == SHT_RELA)
+    entsize = sizeof (Elf_Rela);
+  else
+    entsize = sizeof (Elf_Rel);
+
+  entnum = relhdr->sh_size / entsize;
+  retval = GRUB_ERR_NONE;
+
+  grub_dprintf("dl", "Processing %d relocation entries.\n", entnum);
+
+  /* Step through all relocations */
+  for (i = 0, symbol = mod->symtab; i < entnum; i++)
+    {
+      void *place;
+      grub_uint64_t sym_addr, symidx, reltype;
+
+      if (rel->r_offset >= segment->size)
+	return grub_error (GRUB_ERR_BAD_MODULE,
+			   "reloc offset is out of the segment");
+
+      symidx = ELF_R_SYM (rel->r_info);
+      reltype = ELF_R_TYPE (rel->r_info);
+
+      sym_addr = symbol[symidx].st_value;
+      if (relhdr->sh_type == SHT_RELA)
+	sym_addr += rela->r_addend;
+
+      place = (void *) ((grub_addr_t) segment->addr + rel->r_offset);
+
+      switch (reltype)
+	{
+	case R_AARCH64_ABS64:
+	  {
+	    grub_uint64_t *abs_place = place;
+
+	    grub_dprintf ("dl", "  reloc_abs64 %p => 0x%016llx\n",
+			  place, (unsigned long long) sym_addr);
+
+	    *abs_place = (grub_uint64_t) sym_addr;
+	  }
+	  break;
+	case R_AARCH64_CALL26:
+	case R_AARCH64_JUMP26:
+	  retval = grub_arm64_reloc_xxxx26 (place, sym_addr);
+	  break;
+	default:
+	  return grub_error (GRUB_ERR_NOT_IMPLEMENTED_YET,
+			     N_("relocation 0x%x is not implemented yet"),
+			     reltype);
+	}
+
+      if (retval != GRUB_ERR_NONE)
+	break;
+
+      rel = (Elf_Rel *) ((grub_addr_t) rel + entsize);
+      rela++;
+    }
+
+  return retval;
+}
+
+/*
+ * Verify that provided ELF header contains reference to a symbol table
+ */
+static int
+has_symtab (Elf_Ehdr * e)
+{
+  int i;
+  Elf_Shdr *s;
+
+  for (i = 0, s = (Elf_Shdr *) ((grub_addr_t) e + e->e_shoff);
+       i < e->e_shnum;
+       i++, s = (Elf_Shdr *) ((grub_addr_t) s + e->e_shentsize))
+    if (s->sh_type == SHT_SYMTAB)
+      return 1;
+
+  return 0;
+}
+
+/*
+ * grub_arch_dl_relocate_symbols():
+ *   Locates the relocations section of the ELF object, and calls
+ *   do_relX() to deal with it.
+ */
+grub_err_t
+grub_arch_dl_relocate_symbols (grub_dl_t mod, void *ehdr)
+{
+  Elf_Ehdr *e = ehdr;
+  Elf_Shdr *s;
+  unsigned i;
+
+  if (!has_symtab (e))
+    return grub_error (GRUB_ERR_BAD_MODULE, N_("no symbol table"));
+
+#define FIRST_SHDR(x) ((Elf_Shdr *) ((grub_addr_t)(x) + (x)->e_shoff))
+#define NEXT_SHDR(x, y) ((Elf_Shdr *) ((grub_addr_t)(y) + (x)->e_shentsize))
+
+  for (i = 0, s = FIRST_SHDR (e); i < e->e_shnum; i++, s = NEXT_SHDR (e, s))
+    {
+      grub_err_t ret;
+
+      switch (s->sh_type)
+	{
+	case SHT_REL:
+	case SHT_RELA:
+	  {
+	    ret = do_relX (s, e, mod);
+	    if (ret != GRUB_ERR_NONE)
+	      return ret;
+	  }
+	  break;
+	case SHT_ARM_ATTRIBUTES:
+	case SHT_NOBITS:
+	case SHT_NULL:
+	case SHT_PROGBITS:
+	case SHT_SYMTAB:
+	case SHT_STRTAB:
+	  break;
+	default:
+	  {
+	    grub_dprintf ("dl", "unhandled section_type: %d (0x%08x)\n",
+			  s->sh_type, s->sh_type);
+	    return GRUB_ERR_NOT_IMPLEMENTED_YET;
+	  };
+	}
+    }
+
+#undef FIRST_SHDR
+#undef NEXT_SHDR
+
+  return GRUB_ERR_NONE;
+}
diff --git a/grub-core/kern/arm64/dl_helper.c b/grub-core/kern/arm64/dl_helper.c
new file mode 100644
index 0000000..2827370
--- /dev/null
+++ b/grub-core/kern/arm64/dl_helper.c
@@ -0,0 +1,72 @@ 
+/* dl_helper.c - relocation helper functions for modules and grub-mkimage */
+/*
+ *  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/dl.h>
+#include <grub/elf.h>
+#include <grub/misc.h>
+#include <grub/err.h>
+#include <grub/mm.h>
+#include <grub/i18n.h>
+#include <grub/cpu/reloc.h>
+
+static grub_ssize_t
+sign_compress_offset (grub_ssize_t offset, int bitpos)
+{
+  return offset & ((1LL << (bitpos + 1)) - 1);
+}
+
+/*
+ * grub_arm64_reloc_xxxx26():
+ *
+ * JUMP26/CALL26 relocations for B and BL instructions.
+ */
+
+grub_err_t
+grub_arm64_reloc_xxxx26 (grub_uint32_t *place, Elf64_Addr adjust)
+{
+  grub_uint32_t insword, insmask;
+  grub_ssize_t offset, offset_low, offset_high;
+
+  insword = grub_le_to_cpu32 (*place);
+  insmask = 0xfc000000;
+
+  offset_low = -(1 << 27);
+  offset_high = (1 << 27) - 1;
+
+  offset = adjust;
+#ifndef GRUB_UTIL
+  offset -= (grub_addr_t) place;
+#endif
+
+  if ((offset < offset_low) || (offset > offset_high))
+    {
+      return grub_error (GRUB_ERR_BAD_MODULE,
+			 N_("CALL26 Relocation out of range"));
+    }
+
+  grub_dprintf ("dl", "  reloc_xxxx64 %p %c= 0x%llx\n",
+		place, offset > 0 ? '+' : '-',
+		offset < 0 ? (long long) -(unsigned long long) offset : offset);
+
+  offset = sign_compress_offset (offset, 27) >> 2;
+
+  *place = grub_cpu_to_le32 ((insword & insmask) | offset);
+
+  return GRUB_ERR_NONE;
+}
diff --git a/grub-core/kern/arm64/efi/startup.S b/grub-core/kern/arm64/efi/startup.S
new file mode 100644
index 0000000..781c2b0
--- /dev/null
+++ b/grub-core/kern/arm64/efi/startup.S
@@ -0,0 +1,34 @@ 
+/*
+ *  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>
+
+	.file 	"startup.S"
+	.text
+FUNCTION(_start)
+	/*
+	 *  EFI_SYSTEM_TABLE and EFI_HANDLE are passed in x1/x0.
+	 */
+	ldr	x2, =EXT_C(grub_efi_image_handle)
+	str	x0, [x2]
+	ldr	x2, =EXT_C(grub_efi_system_table)
+	str	x1, [x2]
+	ldr	x2, =EXT_C(grub_main)
+	br	x2
+
+	.end
diff --git a/grub-core/lib/arm64/setjmp.S b/grub-core/lib/arm64/setjmp.S
new file mode 100644
index 0000000..adaafe4
--- /dev/null
+++ b/grub-core/lib/arm64/setjmp.S
@@ -0,0 +1,53 @@ 
+/*
+ *  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>
+
+	.file	"setjmp.S"
+	.text
+
+/*
+ * int grub_setjmp (grub_jmp_buf env)
+ */
+FUNCTION(grub_setjmp)
+	stp	x19, x20, [x0], #16
+	stp	x21, x22, [x0], #16
+	stp	x23, x24, [x0], #16
+	stp	x25, x26, [x0], #16
+	stp	x27, x28, [x0], #16
+	stp	x29, x30, [x0], #16
+	mov	x1, sp
+	str	x1, [x0]
+	mov	x0, #0
+	ret
+
+/*
+ * int grub_longjmp (grub_jmp_buf env, int val)
+ */
+FUNCTION(grub_longjmp)
+	ldp	x19, x20, [x0], #16
+	ldp	x21, x22, [x0], #16
+	ldp	x23, x24, [x0], #16
+	ldp	x25, x26, [x0], #16
+	ldp	x27, x28, [x0], #16
+	ldp	x29, x30, [x0], #16
+	ldr	x2, [x0]
+	mov	sp, x2
+	cmp	x1, #0
+	csel	x0, x1, x0, ne
+	ret
diff --git a/grub-core/lib/efi/halt.c b/grub-core/lib/efi/halt.c
index ce93db3..e9441c8 100644
--- a/grub-core/lib/efi/halt.c
+++ b/grub-core/lib/efi/halt.c
@@ -29,7 +29,7 @@  void
 grub_halt (void)
 {
   grub_machine_fini (GRUB_LOADER_FLAG_NORETURN);
-#if !defined(__ia64__) && !defined(__arm__)
+#if !defined(__ia64__) && !defined(__arm__) && !defined(__aarch64__)
   grub_acpi_halt ();
 #endif
   efi_call_4 (grub_efi_system_table->runtime_services->reset_system,
diff --git a/grub-core/lib/setjmp.S b/grub-core/lib/setjmp.S
index feb7b43..f6e4905 100644
--- a/grub-core/lib/setjmp.S
+++ b/grub-core/lib/setjmp.S
@@ -13,6 +13,8 @@ 
 #include "./ia64/longjmp.S"
 #elif defined(__arm__)
 #include "./arm/setjmp.S"
+#elif defined(__aarch64__)
+#include "./arm64/setjmp.S"
 #else
 #error "Unknown target cpu type"
 #endif
diff --git a/include/grub/arm64/efi/memory.h b/include/grub/arm64/efi/memory.h
new file mode 100644
index 0000000..c9a61bb
--- /dev/null
+++ b/include/grub/arm64/efi/memory.h
@@ -0,0 +1 @@ 
+#include <grub/efi/memory.h>
diff --git a/include/grub/arm64/reloc.h b/include/grub/arm64/reloc.h
new file mode 100644
index 0000000..606d71c
--- /dev/null
+++ b/include/grub/arm64/reloc.h
@@ -0,0 +1,24 @@ 
+/*
+ *  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/>.
+ */
+
+#ifndef GRUB_ARM64_RELOC_H
+#define GRUB_ARM64_RELOC_H 1
+
+grub_err_t grub_arm64_reloc_xxxx26 (grub_uint32_t *target, Elf64_Addr sym_addr);
+
+#endif
diff --git a/include/grub/arm64/setjmp.h b/include/grub/arm64/setjmp.h
new file mode 100644
index 0000000..111d697
--- /dev/null
+++ b/include/grub/arm64/setjmp.h
@@ -0,0 +1,27 @@ 
+/*
+ *  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/>.
+ */
+
+#ifndef GRUB_SETJMP_CPU_HEADER
+#define GRUB_SETJMP_CPU_HEADER	1
+
+typedef unsigned long long grub_jmp_buf[13];
+
+int grub_setjmp (grub_jmp_buf env) __attribute__ ((returns_twice));
+void grub_longjmp (grub_jmp_buf env, int val) __attribute__ ((noreturn));
+
+#endif /* ! GRUB_SETJMP_CPU_HEADER */
diff --git a/include/grub/arm64/time.h b/include/grub/arm64/time.h
new file mode 100644
index 0000000..4128506
--- /dev/null
+++ b/include/grub/arm64/time.h
@@ -0,0 +1,29 @@ 
+/*
+ *  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/>.
+ */
+
+#ifndef KERNEL_CPU_TIME_HEADER
+#define KERNEL_CPU_TIME_HEADER	1
+
+static __inline void
+grub_cpu_idle (void)
+{
+  /* FIXME: this can't work until we handle interrupts.  */
+/*  __asm__ __volatile__ ("wfi"); */
+}
+
+#endif /* ! KERNEL_CPU_TIME_HEADER */
diff --git a/include/grub/arm64/types.h b/include/grub/arm64/types.h
new file mode 100644
index 0000000..91fe027
--- /dev/null
+++ b/include/grub/arm64/types.h
@@ -0,0 +1,34 @@ 
+/*
+ *  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/>.
+ */
+
+#ifndef GRUB_TYPES_CPU_HEADER
+#define GRUB_TYPES_CPU_HEADER	1
+
+/* The size of void *.  */
+#define GRUB_TARGET_SIZEOF_VOID_P	8
+
+/* The size of long.  */
+#define GRUB_TARGET_SIZEOF_LONG		8
+
+/* currently only support little-endian.  */
+#undef GRUB_TARGET_WORDS_BIGENDIAN
+
+/* Unaligned accesses only supported if MMU enabled */
+#define GRUB_HAVE_UNALIGNED_ACCESS 1
+
+#endif /* ! GRUB_TYPES_CPU_HEADER */
diff --git a/include/grub/efi/api.h b/include/grub/efi/api.h
index f750340..3af0911 100644
--- a/include/grub/efi/api.h
+++ b/include/grub/efi/api.h
@@ -1534,7 +1534,8 @@  struct grub_efi_block_io
 };
 typedef struct grub_efi_block_io grub_efi_block_io_t;
 
-#if (GRUB_TARGET_SIZEOF_VOID_P == 4) || defined (__ia64__)
+#if (GRUB_TARGET_SIZEOF_VOID_P == 4) || defined (__ia64__) \
+  || defined (__aarch64__)
 
 #define efi_call_0(func)		func()
 #define efi_call_1(func, a)		func(a)
diff --git a/include/grub/efi/pe32.h b/include/grub/efi/pe32.h
index 7cacabd..4adea60 100644
--- a/include/grub/efi/pe32.h
+++ b/include/grub/efi/pe32.h
@@ -67,6 +67,7 @@  struct grub_pe32_coff_header
 #define GRUB_PE32_MACHINE_IA64			0x200
 #define GRUB_PE32_MACHINE_X86_64		0x8664
 #define GRUB_PE32_MACHINE_ARMTHUMB_MIXED	0x01c2
+#define GRUB_PE32_MACHINE_ARM64			0xAA64
 
 #define GRUB_PE32_RELOCS_STRIPPED		0x0001
 #define GRUB_PE32_EXECUTABLE_IMAGE		0x0002
diff --git a/include/grub/elf.h b/include/grub/elf.h
index f64d6a8..140d24d 100644
--- a/include/grub/elf.h
+++ b/include/grub/elf.h
@@ -246,6 +246,7 @@  typedef struct
 #define EM_ARC_A5	93		/* ARC Cores Tangent-A5 */
 #define EM_XTENSA	94		/* Tensilica Xtensa Architecture */
 #define EM_NUM		95
+#define EM_AARCH64	183		/* ARM 64-bit architecture */
 
 /* If it is necessary to assign new unofficial EM_* values, please
    pick large random numbers (0x8523, 0xa7f2, etc.) to minimize the
@@ -2062,6 +2063,21 @@  typedef Elf32_Addr Elf32_Conflict;
 #define SHT_ARM_ATTRIBUTES	(SHT_LOPROC + 3) /* ARM attributes section.  */
 
 
+/* AArch64 relocs.  */
+#define R_AARCH64_NONE			0	/* No relocation.  */
+#define R_AARCH64_ABS64			257	/* Direct 64 bit. */
+#define R_AARCH64_ABS32			258	/* Direct 32 bit.  */
+#define R_AARCH64_JUMP26		282	/* 26-bit relative. */
+#define R_AARCH64_CALL26		283	/* 26-bit relative. */
+#define R_AARCH64_COPY			1024	/* Copy symbol at runtime.  */
+#define R_AARCH64_GLOB_DAT		1025	/* Create GOT entry.  */
+#define R_AARCH64_JUMP_SLOT		1026	/* Create PLT entry.  */
+#define R_AARCH64_RELATIVE		1027	/* Adjust by program base.  */
+#define R_AARCH64_TLS_DTPMOD64		1028	/* Module number, 64 bit.  */
+#define R_AARCH64_TLS_DTPREL64		1029	/* Module-relative offset, 64 bit.  */
+#define R_AARCH64_TLS_TPREL64		1030	/* TP-relative offset, 64 bit.  */
+#define R_AARCH64_TLSDESC		1031	/* TLS Descriptor.  */
+
 /* ARM relocs.  */
 #define R_ARM_NONE		0	/* No reloc */
 #define R_ARM_PC24		1	/* PC relative 26 bit branch */
diff --git a/util/grub-install.in b/util/grub-install.in
index 4cddf5e..a882acf 100644
--- a/util/grub-install.in
+++ b/util/grub-install.in
@@ -280,6 +280,8 @@  if [ x$source_directory = x ]; then
 		;;
 	    x"arm"*)
 		target="arm-uboot";;
+	    x"aarch64"*)
+		target="arm64-efi";;
 	    *)
 		gettext "Unable to determine your platform. Use --target." ;
 		echo	;;
@@ -434,6 +436,8 @@  if [ x"$grub_modinfo_platform" = xefi ]; then
 		    efi_file=BOOTIA64.EFI ;;
 		arm)
 		    efi_file=BOOTARM.EFI ;;
+		arm64)
+		    efi_file=BOOTAARCH64.EFI ;;
 	    esac
 	else
 	    # It is convenient for each architecture to have a different
@@ -450,6 +454,8 @@  if [ x"$grub_modinfo_platform" = xefi ]; then
 		    efi_file=grubia64.efi ;;
 		arm)
 		    efi_file=grubarm.efi ;;
+		arm64)
+		    efi_file=grubarm64.efi ;;
 		*)
 		    efi_file=grub.efi ;;
 	    esac
diff --git a/util/grub-mkimagexx.c b/util/grub-mkimagexx.c
index 36a683d..b88e9b9 100644
--- a/util/grub-mkimagexx.c
+++ b/util/grub-mkimagexx.c
@@ -718,6 +718,35 @@  SUFFIX (relocate_addresses) (Elf_Ehdr *e, Elf_Shdr *sections,
 		  break;
 		}
 	       break;
+	     case EM_AARCH64:
+	       {
+		 sym_addr += addend;
+		 switch (ELF_R_TYPE (info))
+		   {
+		   case R_AARCH64_ABS64:
+		     {
+		       *target = grub_host_to_target64 (grub_target_to_host64 (*target) + sym_addr);
+		     }
+		     break;
+		   case R_AARCH64_JUMP26:
+		   case R_AARCH64_CALL26:
+		     {
+		       grub_err_t err;
+		       sym_addr -= offset;
+		       sym_addr -= SUFFIX (entry_point);
+		       err = grub_arm64_reloc_xxxx26((grub_uint32_t *)target,
+						     sym_addr);
+		       if (err)
+			 grub_util_error ("%s", grub_errmsg);
+		     }
+		     break;
+		   default:
+		     grub_util_error (_("relocation %d is not implemented yet"),
+				      (unsigned long long) ELF_R_TYPE (info));
+		     break;
+		   }
+	       break;
+	       }
 #endif
 #if defined(MKIMAGE_ELF32)
 	     case EM_ARM:
@@ -995,6 +1024,32 @@  SUFFIX (make_reloc_section) (Elf_Ehdr *e, void **out,
 		  break;
 		}
 		break;
+	      case EM_AARCH64:
+		switch (ELF_R_TYPE (info))
+		  {
+		  case R_AARCH64_ABS64:
+		    {
+		      Elf_Addr addr;
+
+		      addr = section_address + offset;
+		      current_address
+			= SUFFIX (add_fixup_entry) (&lst,
+						    GRUB_PE32_REL_BASED_DIR64,
+						    addr, 0, current_address,
+						    image_target);
+		    }
+		    break;
+		    /* Relative relocations do not require fixup entries. */
+		  case R_AARCH64_CALL26:
+		  case R_AARCH64_JUMP26:
+		    break;
+		  default:
+		    grub_util_error (_("fixup for relocation %d is not implemented yet"),
+				     (unsigned long long) ELF_R_TYPE (info));
+		    break;
+		  }
+		break;
+		break;
 #if defined(MKIMAGE_ELF32)
 	      case EM_ARM:
 		switch (ELF_R_TYPE (info))
@@ -1358,7 +1413,7 @@  SUFFIX (load_image) (const char *kernel_path, size_t *exec_size,
 					  image_target);
       if (*start == 0)
 	grub_util_error ("start symbol is not defined");
-      
+
       SUFFIX (entry_point) = (Elf_Addr) *start;
 
       /* Resolve addresses in the virtual address space.  */
@@ -1367,7 +1422,7 @@  SUFFIX (load_image) (const char *kernel_path, size_t *exec_size,
 				   num_sections, strtab,
 				   out_img, ia64_toff, ia64_got_off,
 				   image_target);
-	  
+
       *reloc_size = SUFFIX (make_reloc_section) (e, reloc_section,
 						 section_vaddresses, sections,
 						 section_entsize, num_sections,
diff --git a/util/mkimage.c b/util/mkimage.c
index a5a683b..963dd94 100644
--- a/util/mkimage.c
+++ b/util/mkimage.c
@@ -42,6 +42,7 @@ 
 #include <grub/efi/pe32.h>
 #include <grub/uboot/image.h>
 #include <grub/arm/reloc.h>
+#include <grub/arm64/reloc.h>
 #include <grub/ia64/reloc.h>
 #include <grub/osdep/hostfile.h>
 #include <grub/util/install.h>
@@ -562,6 +563,22 @@  static const struct grub_install_image_target_desc image_targets[] =
       .pe_target = GRUB_PE32_MACHINE_ARMTHUMB_MIXED,
       .elf_target = EM_ARM,
     },
+    {
+      .dirname = "arm64-efi",
+      .names = { "arm64-efi", NULL },
+      .voidp_sizeof = 8,
+      .bigendian = 0,
+      .id = IMAGE_EFI,
+      .flags = PLATFORM_FLAGS_NONE,
+      .total_module_size = TARGET_NO_FIELD,
+      .decompressor_compressed_size = TARGET_NO_FIELD,
+      .decompressor_uncompressed_size = TARGET_NO_FIELD,
+      .decompressor_uncompressed_addr = TARGET_NO_FIELD,
+      .section_align = GRUB_PE32_SECTION_ALIGNMENT,
+      .vaddr_offset = EFI64_HEADER_SIZE,
+      .pe_target = GRUB_PE32_MACHINE_ARM64,
+      .elf_target = EM_AARCH64,
+    },
   };
 
 #define grub_target_to_host32(x) (grub_target_to_host32_real (image_target, (x)))