File-copy from v4.4.100
This is the result of 'cp' from a linux-stable tree with the 'v4.4.100'
tag checked out (commit 26d6298789e695c9f627ce49a7bbd2286405798a) on
git://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
Please refer to that tree for all history prior to this point.
Change-Id: I8a9ee2aea93cd29c52c847d0ce33091a73ae6afe
diff --git a/arch/mips/include/asm/sn/io.h b/arch/mips/include/asm/sn/io.h
new file mode 100644
index 0000000..d5174d0
--- /dev/null
+++ b/arch/mips/include/asm/sn/io.h
@@ -0,0 +1,59 @@
+/*
+ * This file is subject to the terms and conditions of the GNU General Public
+ * License. See the file "COPYING" in the main directory of this archive
+ * for more details.
+ *
+ * Copyright (C) 2000, 2003 Ralf Baechle
+ * Copyright (C) 2000 Silicon Graphics, Inc.
+ */
+#ifndef _ASM_SN_IO_H
+#define _ASM_SN_IO_H
+
+#if defined(CONFIG_SGI_IP27)
+#include <asm/sn/sn0/hubio.h>
+#endif
+
+
+#define IIO_ITTE_BASE 0x400160 /* base of translation table entries */
+#define IIO_ITTE(bigwin) (IIO_ITTE_BASE + 8*(bigwin))
+
+#define IIO_ITTE_OFFSET_BITS 5 /* size of offset field */
+#define IIO_ITTE_OFFSET_MASK ((1<<IIO_ITTE_OFFSET_BITS)-1)
+#define IIO_ITTE_OFFSET_SHIFT 0
+
+#define IIO_ITTE_WIDGET_BITS 4 /* size of widget field */
+#define IIO_ITTE_WIDGET_MASK ((1<<IIO_ITTE_WIDGET_BITS)-1)
+#define IIO_ITTE_WIDGET_SHIFT 8
+
+#define IIO_ITTE_IOSP 1 /* I/O Space bit */
+#define IIO_ITTE_IOSP_MASK 1
+#define IIO_ITTE_IOSP_SHIFT 12
+#define HUB_PIO_MAP_TO_MEM 0
+#define HUB_PIO_MAP_TO_IO 1
+
+#define IIO_ITTE_INVALID_WIDGET 3 /* an invalid widget */
+
+#define IIO_ITTE_PUT(nasid, bigwin, io_or_mem, widget, addr) \
+ REMOTE_HUB_S((nasid), IIO_ITTE(bigwin), \
+ (((((addr) >> BWIN_SIZE_BITS) & \
+ IIO_ITTE_OFFSET_MASK) << IIO_ITTE_OFFSET_SHIFT) | \
+ (io_or_mem << IIO_ITTE_IOSP_SHIFT) | \
+ (((widget) & IIO_ITTE_WIDGET_MASK) << IIO_ITTE_WIDGET_SHIFT)))
+
+#define IIO_ITTE_DISABLE(nasid, bigwin) \
+ IIO_ITTE_PUT((nasid), HUB_PIO_MAP_TO_MEM, \
+ (bigwin), IIO_ITTE_INVALID_WIDGET, 0)
+
+#define IIO_ITTE_GET(nasid, bigwin) REMOTE_HUB_ADDR((nasid), IIO_ITTE(bigwin))
+
+/*
+ * Macro which takes the widget number, and returns the
+ * IO PRB address of that widget.
+ * value _x is expected to be a widget number in the range
+ * 0, 8 - 0xF
+ */
+#define IIO_IOPRB(_x) (IIO_IOPRB_0 + ( ( (_x) < HUB_WIDGET_ID_MIN ? \
+ (_x) : \
+ (_x) - (HUB_WIDGET_ID_MIN-1)) << 3) )
+
+#endif /* _ASM_SN_IO_H */