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io.h
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1 /*
2  * This file is subject to the terms and conditions of the GNU General Public
3  * License. See the file "COPYING" in the main directory of this archive
4  * for more details.
5  *
6  * Copyright (C) 2000, 2003 Ralf Baechle
7  * Copyright (C) 2000 Silicon Graphics, Inc.
8  */
9 #ifndef _ASM_SN_IO_H
10 #define _ASM_SN_IO_H
11 
12 #if defined(CONFIG_SGI_IP27)
13 #include <asm/sn/sn0/hubio.h>
14 #endif
15 
16 
17 #define IIO_ITTE_BASE 0x400160 /* base of translation table entries */
18 #define IIO_ITTE(bigwin) (IIO_ITTE_BASE + 8*(bigwin))
19 
20 #define IIO_ITTE_OFFSET_BITS 5 /* size of offset field */
21 #define IIO_ITTE_OFFSET_MASK ((1<<IIO_ITTE_OFFSET_BITS)-1)
22 #define IIO_ITTE_OFFSET_SHIFT 0
23 
24 #define IIO_ITTE_WIDGET_BITS 4 /* size of widget field */
25 #define IIO_ITTE_WIDGET_MASK ((1<<IIO_ITTE_WIDGET_BITS)-1)
26 #define IIO_ITTE_WIDGET_SHIFT 8
27 
28 #define IIO_ITTE_IOSP 1 /* I/O Space bit */
29 #define IIO_ITTE_IOSP_MASK 1
30 #define IIO_ITTE_IOSP_SHIFT 12
31 #define HUB_PIO_MAP_TO_MEM 0
32 #define HUB_PIO_MAP_TO_IO 1
33 
34 #define IIO_ITTE_INVALID_WIDGET 3 /* an invalid widget */
35 
36 #define IIO_ITTE_PUT(nasid, bigwin, io_or_mem, widget, addr) \
37  REMOTE_HUB_S((nasid), IIO_ITTE(bigwin), \
38  (((((addr) >> BWIN_SIZE_BITS) & \
39  IIO_ITTE_OFFSET_MASK) << IIO_ITTE_OFFSET_SHIFT) | \
40  (io_or_mem << IIO_ITTE_IOSP_SHIFT) | \
41  (((widget) & IIO_ITTE_WIDGET_MASK) << IIO_ITTE_WIDGET_SHIFT)))
42 
43 #define IIO_ITTE_DISABLE(nasid, bigwin) \
44  IIO_ITTE_PUT((nasid), HUB_PIO_MAP_TO_MEM, \
45  (bigwin), IIO_ITTE_INVALID_WIDGET, 0)
46 
47 #define IIO_ITTE_GET(nasid, bigwin) REMOTE_HUB_ADDR((nasid), IIO_ITTE(bigwin))
48 
49 /*
50  * Macro which takes the widget number, and returns the
51  * IO PRB address of that widget.
52  * value _x is expected to be a widget number in the range
53  * 0, 8 - 0xF
54  */
55 #define IIO_IOPRB(_x) (IIO_IOPRB_0 + ( ( (_x) < HUB_WIDGET_ID_MIN ? \
56  (_x) : \
57  (_x) - (HUB_WIDGET_ID_MIN-1)) << 3) )
58 
59 #endif /* _ASM_SN_IO_H */