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-rw-r--r--include/grub/i386/io.h72
1 files changed, 72 insertions, 0 deletions
diff --git a/include/grub/i386/io.h b/include/grub/i386/io.h
new file mode 100644
index 0000000..e9cd809
--- /dev/null
+++ b/include/grub/i386/io.h
@@ -0,0 +1,72 @@
+/*
+ * GRUB -- GRand Unified Bootloader
+ * Copyright (C) 1996,2000,2002,2007 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/>.
+ */
+
+/* Based on sys/io.h from GNU libc. */
+
+#ifndef GRUB_IO_H
+#define GRUB_IO_H 1
+
+typedef unsigned short int grub_port_t;
+
+static __inline unsigned char
+grub_inb (unsigned short int port)
+{
+ unsigned char _v;
+
+ asm volatile ("inb %w1,%0":"=a" (_v):"Nd" (port));
+ return _v;
+}
+
+static __inline unsigned short int
+grub_inw (unsigned short int port)
+{
+ unsigned short _v;
+
+ asm volatile ("inw %w1,%0":"=a" (_v):"Nd" (port));
+ return _v;
+}
+
+static __inline unsigned int
+grub_inl (unsigned short int port)
+{
+ unsigned int _v;
+
+ asm volatile ("inl %w1,%0":"=a" (_v):"Nd" (port));
+ return _v;
+}
+
+static __inline void
+grub_outb (unsigned char value, unsigned short int port)
+{
+ asm volatile ("outb %b0,%w1": :"a" (value), "Nd" (port));
+}
+
+static __inline void
+grub_outw (unsigned short int value, unsigned short int port)
+{
+ asm volatile ("outw %w0,%w1": :"a" (value), "Nd" (port));
+
+}
+
+static __inline void
+grub_outl (unsigned int value, unsigned short int port)
+{
+ asm volatile ("outl %0,%w1": :"a" (value), "Nd" (port));
+}
+
+#endif /* _SYS_IO_H */