1 files changed, 128 insertions, 0 deletions
diff --git a/include/grub/cmos.h b/include/grub/cmos.h
new file mode 100644
index 0000000..56ccc71
--- /dev/null
+++ b/include/grub/cmos.h
@@ -0,0 +1,128 @@
+/*
+ *  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	GRUB_CMOS_H
+#define	GRUB_CMOS_H	1
+
+#include <grub/types.h>
+#if !defined (__powerpc__) && !defined (__sparc__)
+#include <grub/cpu/io.h>
+#include <grub/cpu/cmos.h>
+#endif
+
+#define GRUB_CMOS_INDEX_SECOND		0
+#define GRUB_CMOS_INDEX_SECOND_ALARM	1
+#define GRUB_CMOS_INDEX_MINUTE		2
+#define GRUB_CMOS_INDEX_MINUTE_ALARM	3
+#define GRUB_CMOS_INDEX_HOUR		4
+#define GRUB_CMOS_INDEX_HOUR_ALARM	5
+#define GRUB_CMOS_INDEX_DAY_OF_WEEK	6
+#define GRUB_CMOS_INDEX_DAY_OF_MONTH	7
+#define GRUB_CMOS_INDEX_MONTH		8
+#define GRUB_CMOS_INDEX_YEAR		9
+
+#define GRUB_CMOS_INDEX_STATUS_A	0xA
+#define GRUB_CMOS_INDEX_STATUS_B	0xB
+#define GRUB_CMOS_INDEX_STATUS_C	0xC
+#define GRUB_CMOS_INDEX_STATUS_D	0xD
+
+#define GRUB_CMOS_STATUS_B_DAYLIGHT	1
+#define GRUB_CMOS_STATUS_B_24HOUR	2
+#define GRUB_CMOS_STATUS_B_BINARY	4
+
+static inline grub_uint8_t
+grub_bcd_to_num (grub_uint8_t a)
+{
+  return ((a >> 4) * 10 + (a & 0xF));
+}
+
+static inline grub_uint8_t
+grub_num_to_bcd (grub_uint8_t a)
+{
+  return (((a / 10) << 4) + (a % 10));
+}
+
+#if !defined (__powerpc__) && !defined (__sparc__)
+static inline grub_err_t
+grub_cmos_read (grub_uint8_t index, grub_uint8_t *val)
+{
+  if (index & 0x80)
+    {
+      grub_outb (index & 0x7f, GRUB_CMOS_ADDR_REG_HI);
+      *val = grub_inb (GRUB_CMOS_DATA_REG_HI);
+    }
+  else
+    {
+      grub_outb (index & 0x7f, GRUB_CMOS_ADDR_REG);
+      *val = grub_inb (GRUB_CMOS_DATA_REG);
+    }
+  return GRUB_ERR_NONE;
+}
+
+static inline grub_err_t
+grub_cmos_write (grub_uint8_t index, grub_uint8_t value)
+{
+  if (index & 0x80)
+    {
+      grub_outb (index & 0x7f, GRUB_CMOS_ADDR_REG_HI);
+      grub_outb (value, GRUB_CMOS_DATA_REG_HI);
+    }
+  else
+    {
+      grub_outb (index & 0x7f, GRUB_CMOS_ADDR_REG);
+      grub_outb (value, GRUB_CMOS_DATA_REG);
+    }
+  return GRUB_ERR_NONE;
+}
+#else
+grub_err_t grub_cmos_find_port (void);
+extern volatile grub_uint8_t *grub_cmos_port;
+
+static inline grub_err_t
+grub_cmos_read (grub_uint8_t index, grub_uint8_t *val)
+{
+  if (!grub_cmos_port)
+    {
+      grub_err_t err;
+      err = grub_cmos_find_port ();
+      if (err)
+	return err;
+    }
+  grub_cmos_port[((index & 0x80) >> 6) | 0] = index & 0x7f;
+  *val = grub_cmos_port[((index & 0x80) >> 6) | 1];
+  return GRUB_ERR_NONE;
+}
+
+static inline grub_err_t
+grub_cmos_write (grub_uint8_t index, grub_uint8_t val)
+{
+  if (!grub_cmos_port)
+    {
+      grub_err_t err;
+      err = grub_cmos_find_port ();
+      if (err)
+	return err;
+    }
+  grub_cmos_port[((index & 0x80) >> 6) | 0] = index;
+  grub_cmos_port[((index & 0x80) >> 6) | 1] = val;
+  return GRUB_ERR_NONE;
+}
+
+#endif
+
+#endif /* GRUB_CMOS_H */