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/* $Id: io.h,v 1.2 2000/02/02 16:35:57 ralf Exp $
*
* 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 Ralf Baechle
* Copyright (C) 2000 Silicon Graphics, Inc.
*/
#ifndef _ASM_SN_IO_H
#define _ASM_SN_IO_H
#include <linux/config.h>
#if defined(CONFIG_SGI_IP35) || defined(CONFIG_IA64_SGI_SN1) || defined(CONFIG_IA64_GENERIC)
#include <asm/sn/sn1/addrs.h>
#endif
#define IO_SPACE_BASE IO_BASE
/* Because we only have PCI I/O ports. */
#if !defined(CONFIG_IA64_SGI_IO)
#define IO_SPACE_LIMIT 0xffffffff
/* No isa_* versions, the Origin doesn't have ISA / EISA bridges. */
#else /* CONFIG_IA64_SGI_IO */
#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) )
#if defined(CONFIG_SGI_IP35) || defined(CONFIG_IA64_SGI_SN1) || defined(CONFIG_IA64_GENERIC)
#include <asm/sn/sn1/hubio.h>
#endif
#endif /* CONFIG_IA64_SGI_IO */
#endif /* _ASM_SN_IO_H */
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