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-rw-r--r--include/grub/i386/pmtimer.h37
1 files changed, 37 insertions, 0 deletions
diff --git a/include/grub/i386/pmtimer.h b/include/grub/i386/pmtimer.h
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+++ b/include/grub/i386/pmtimer.h
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+/*
+ * GRUB -- GRand Unified Bootloader
+ * Copyright (C) 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/>.
+ */
+
+#ifndef KERNEL_CPU_PMTIMER_HEADER
+#define KERNEL_CPU_PMTIMER_HEADER 1
+
+#include <grub/i386/tsc.h>
+#include <grub/i386/io.h>
+
+/*
+ Preconditions:
+ * Caller has ensured that both pmtimer and tsc are supported
+ * 1 <= num_pm_ticks <= 3580
+ Return:
+ * Number of TSC ticks elapsed
+ * 0 on failure.
+*/
+grub_uint64_t
+EXPORT_FUNC(grub_pmtimer_wait_count_tsc) (grub_port_t pmtimer,
+ grub_uint16_t num_pm_ticks);
+
+#endif