* grub-core/Makefile.core.def (efifwsetup): New module.

* grub-core/commands/efi/efifwsetup.c: New file.
	* grub-core/kern/efi/efi.c (grub_efi_set_variable): New function
	* include/grub/efi/api.h (GRUB_EFI_OS_INDICATIONS_BOOT_TO_FW_UI):
	New define.
	* include/grub/efi/efi.h (grub_efi_set_variable): New proto.

ChangeLog

@@ -1,3 +1,12 @@
+2012-09-08  Peter Jones <pjones@redhat.com>
+
+	* grub-core/Makefile.core.def (efifwsetup): New module.
+	* grub-core/commands/efi/efifwsetup.c: New file.
+	* grub-core/kern/efi/efi.c (grub_efi_set_variable): New function
+	* include/grub/efi/api.h (GRUB_EFI_OS_INDICATIONS_BOOT_TO_FW_UI):
+	New define.
+	* include/grub/efi/efi.h (grub_efi_set_variable): New proto.
+
 2012-09-05  Jiri Slaby <jslaby@suse.cz>
 
 	* configure.ac: Add SuSe path.

grub-core/Makefile.core.def

@@ -574,6 +574,12 @@ module = {
   enable = efi;
 };
 
+module = {
+  name = efifwsetup;
+  efi = commands/efi/efifwsetup.c;
+  enable = efi;
+};
+
 module = {
   name = blocklist;
   common = commands/blocklist.c;

grub-core/commands/efi/efifwsetup.c

@@ -0,0 +1,90 @@
+/* fwsetup.c - Reboot into firmware setup menu. */
+/*
+ *  GRUB  --  GRand Unified Bootloader
+ *  Copyright (C) 2012  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/mm.h>
+#include <grub/misc.h>
+#include <grub/efi/api.h>
+#include <grub/efi/efi.h>
+#include <grub/command.h>
+#include <grub/i18n.h>
+
+GRUB_MOD_LICENSE ("GPLv3+");
+
+static grub_err_t
+grub_cmd_fwsetup (grub_command_t cmd __attribute__ ((unused)),
+		  int argc __attribute__ ((unused)),
+		  char **args __attribute__ ((unused)))
+{
+  grub_efi_uint64_t *old_os_indications;
+  grub_efi_uint64_t os_indications = GRUB_EFI_OS_INDICATIONS_BOOT_TO_FW_UI;
+  grub_err_t status;
+  grub_size_t oi_size;
+  grub_efi_guid_t global = GRUB_EFI_GLOBAL_VARIABLE_GUID;
+
+  old_os_indications = grub_efi_get_variable ("OsIndications", &global,
+					      &oi_size);
+
+  if (old_os_indications != NULL && oi_size == sizeof (os_indications))
+    os_indications |= *old_os_indications;
+
+  status = grub_efi_set_variable ("OsIndications", &global, &os_indications,
+				  sizeof (os_indications));
+  if (status != GRUB_ERR_NONE)
+    return status;
+
+  grub_reboot ();
+
+  return GRUB_ERR_BUG;
+}
+
+static grub_command_t cmd = NULL;
+
+static grub_efi_boolean_t
+efifwsetup_is_supported (void)
+{
+  grub_efi_uint64_t *os_indications_supported = NULL;
+  grub_size_t oi_size = 0;
+  grub_efi_guid_t global = GRUB_EFI_GLOBAL_VARIABLE_GUID;
+
+  os_indications_supported = grub_efi_get_variable ("OsIndicationsSupported",
+						    &global, &oi_size);
+
+  if (!os_indications_supported)
+    return 0;
+
+  if (*os_indications_supported & GRUB_EFI_OS_INDICATIONS_BOOT_TO_FW_UI)
+    return 1;
+
+  return 0;
+}
+
+GRUB_MOD_INIT (efifwsetup)
+{
+  if (efifwsetup_is_supported ())
+    cmd = grub_register_command ("fwsetup", grub_cmd_fwsetup, NULL,
+				 N_("Reboot into firmware setup menu."));
+
+}
+
+GRUB_MOD_FINI (efifwsetup)
+{
+  if (cmd)
+    grub_unregister_command (cmd);
+}

grub-core/kern/efi/efi.c

@@ -181,6 +181,36 @@ grub_efi_set_virtual_address_map (grub_efi_uintn_t memory_map_size,
   return grub_error (GRUB_ERR_IO, "set_virtual_address_map failed");
 }
 
+grub_err_t
+grub_efi_set_variable(const char *var, const grub_efi_guid_t *guid,
+		      void *data, grub_size_t datasize)
+{
+  grub_efi_status_t status;
+  grub_efi_runtime_services_t *r;
+  grub_efi_char16_t *var16;
+  grub_size_t len, len16;
+
+  len = grub_strlen (var);
+  len16 = len * GRUB_MAX_UTF16_PER_UTF8;
+  var16 = grub_malloc ((len16 + 1) * sizeof (var16[0]));
+  if (!var16)
+    return grub_errno;
+  len16 = grub_utf8_to_utf16 (var16, len16, (grub_uint8_t *) var, len, NULL);
+  var16[len16] = 0;
+
+  r = grub_efi_system_table->runtime_services;
+
+  status = efi_call_5 (r->set_variable, var16, guid, 
+		       (GRUB_EFI_VARIABLE_NON_VOLATILE
+			| GRUB_EFI_VARIABLE_BOOTSERVICE_ACCESS
+			| GRUB_EFI_VARIABLE_RUNTIME_ACCESS),
+		       datasize, data);
+  if (status == GRUB_EFI_SUCCESS)
+    return GRUB_ERR_NONE;
+
+  return grub_error (GRUB_ERR_IO, "could not set EFI variable `%s'", var);
+}
+
 void *
 grub_efi_get_variable (const char *var, const grub_efi_guid_t *guid,
 		       grub_size_t *datasize_out)

include/grub/efi/api.h

@@ -58,6 +58,8 @@
 #define GRUB_EFI_OPEN_PROTOCOL_BY_DRIVER		0x00000010
 #define GRUB_EFI_OPEN_PROTOCOL_BY_EXCLUSIVE		0x00000020
 
+#define GRUB_EFI_OS_INDICATIONS_BOOT_TO_FW_UI	0x0000000000000001ULL
+
 #define GRUB_EFI_VARIABLE_NON_VOLATILE		0x0000000000000001
 #define GRUB_EFI_VARIABLE_BOOTSERVICE_ACCESS	0x0000000000000002
 #define GRUB_EFI_VARIABLE_RUNTIME_ACCESS	0x0000000000000004

include/grub/efi/efi.h

@@ -64,6 +64,11 @@ grub_err_t EXPORT_FUNC (grub_efi_set_virtual_address_map) (grub_efi_uintn_t memo
 void *EXPORT_FUNC (grub_efi_get_variable) (const char *variable,
 					   const grub_efi_guid_t *guid,
 					   grub_size_t *datasize_out);
+grub_err_t
+EXPORT_FUNC (grub_efi_set_variable) (const char *var,
+				     const grub_efi_guid_t *guid,
+				     void *data,
+				     grub_size_t datasize);
 int
 EXPORT_FUNC (grub_efi_compare_device_paths) (const grub_efi_device_path_t *dp1,
 					     const grub_efi_device_path_t *dp2);