1. 根目录:
2. arch
3. mips
4. include
5. asm
6. xtalk
7. xtalk.h

/*
 * 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.
 *
 * xtalk.h -- platform-independent crosstalk interface, derived from
 * IRIX <sys/PCI/bridge.h>, revision 1.38.
 *
 * Copyright (C) 1995 - 1997, 1999 Silcon Graphics, Inc.
 * Copyright (C) 1999 Ralf Baechle (ralf@gnu.org)
 */
#ifndef _ASM_XTALK_XTALK_H
#define _ASM_XTALK_XTALK_H

#ifndef __ASSEMBLY__
/*
 * User-level device driver visible types
 */
typedef char		xwidgetnum_t;	/* xtalk widget number	(0..15) */

#define XWIDGET_NONE		-1

typedef int xwidget_part_num_t; /* xtalk widget part number */

#define XWIDGET_PART_NUM_NONE	-1

typedef int		xwidget_rev_num_t;	/* xtalk widget revision number */

#define XWIDGET_REV_NUM_NONE	-1

typedef int xwidget_mfg_num_t;	/* xtalk widget manufacturing ID */

#define XWIDGET_MFG_NUM_NONE	-1

typedef struct xtalk_piomap_s *xtalk_piomap_t;

/* It is often convenient to fold the XIO target port
 * number into the XIO address.
 */
#define XIO_NOWHERE	(0xFFFFFFFFFFFFFFFFull)
#define XIO_ADDR_BITS	(0x0000FFFFFFFFFFFFull)
#define XIO_PORT_BITS	(0xF000000000000000ull)
#define XIO_PORT_SHIFT	(60)

#define XIO_PACKED(x)	(((x)&XIO_PORT_BITS) != 0)
#define XIO_ADDR(x)	((x)&XIO_ADDR_BITS)
#define XIO_PORT(x)	((xwidgetnum_t)(((x)&XIO_PORT_BITS) >> XIO_PORT_SHIFT))
#define XIO_PACK(p, o)	((((uint64_t)(p))<<XIO_PORT_SHIFT) | ((o)&XIO_ADDR_BITS))

#ifdef CONFIG_PCI
extern int bridge_probe(nasid_t nasid, int widget, int masterwid);
#else
static inline int bridge_probe(nasid_t nasid, int widget, int masterwid)
{
	return 0;
}
#endif

#endif /* !__ASSEMBLY__ */

#endif /* _ASM_XTALK_XTALK_H */