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-rw-r--r--include/grub/cmos.h128
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 */