1 files changed, 80 insertions, 0 deletions
diff --git a/grub-core/kern/ia64/efi/init.c b/grub-core/kern/ia64/efi/init.c
new file mode 100644
index 0000000..f196557
--- /dev/null
+++ b/grub-core/kern/ia64/efi/init.c
@@ -0,0 +1,80 @@
+/* init.c - initialize an ia64-based EFI system */
+/*
+ *  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/misc.h>
+#include <grub/mm.h>
+#include <grub/time.h>
+#include <grub/err.h>
+#include <grub/dl.h>
+#include <grub/kernel.h>
+#include <grub/efi/efi.h>
+#include <grub/loader.h>
+
+static grub_uint64_t divisor = 1;
+
+static grub_uint64_t
+get_itc (void)
+{
+  grub_uint64_t ret;
+  asm volatile ("mov %0=ar.itc" : "=r" (ret));
+  return ret;
+}
+
+grub_uint64_t
+grub_rtc_get_time_ms (void)
+{
+  return get_itc () / divisor;
+}
+
+void
+grub_machine_init (void)
+{
+  grub_efi_event_t event;
+  grub_uint64_t before, after;
+  grub_efi_uintn_t idx;
+  grub_efi_init ();
+
+  efi_call_5 (grub_efi_system_table->boot_services->create_event,
+	      GRUB_EFI_EVT_TIMER, GRUB_EFI_TPL_CALLBACK, 0, 0, &event);
+
+  before = get_itc ();
+  efi_call_3 (grub_efi_system_table->boot_services->set_timer, event,
+	      GRUB_EFI_TIMER_RELATIVE, 200000);
+  efi_call_3 (grub_efi_system_table->boot_services->wait_for_event, 1,
+	      &event, &idx);
+  after = get_itc ();
+  efi_call_1 (grub_efi_system_table->boot_services->close_event, event);
+  divisor = (after - before + 5) / 20;
+  if (divisor == 0)
+    divisor = 800000;
+  grub_install_get_time_ms (grub_rtc_get_time_ms);
+}
+
+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 ();
+}