1. 根目录:
2. arch
3. mips
4. include
5. asm
6. sn
7. gda.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.
 *
 * Derived from IRIX <sys/SN/gda.h>.
 *
 * Copyright (C) 1992 - 1997, 2000 Silicon Graphics, Inc.
 *
 * gda.h -- Contains the data structure for the global data area,
 *	The GDA contains information communicated between the
 *	PROM, SYMMON, and the kernel.
 */
#ifndef _ASM_SN_GDA_H
#define _ASM_SN_GDA_H

#include <asm/sn/addrs.h>

#define GDA_MAGIC	0x58464552

/*
 * GDA Version History
 *
 * Version #	| Change
 * -------------+-------------------------------------------------------
 *	1	| Initial SN0 version
 *	2	| Prom sets g_partid field to the partition number. 0 IS
 *		| a valid partition #.
 */

#define GDA_VERSION	2	/* Current GDA version # */

#define G_MAGICOFF	0
#define G_VERSIONOFF	4
#define G_PROMOPOFF	6
#define G_MASTEROFF	8
#define G_VDSOFF	12
#define G_HKDNORMOFF	16
#define G_HKDUTLBOFF	24
#define G_HKDXUTLBOFF	32
#define G_PARTIDOFF	40
#define G_TABLEOFF	128

#ifndef __ASSEMBLY__

typedef struct gda {
	u32	g_magic;	/* GDA magic number */
	u16	g_version;	/* Version of this structure */
	u16	g_masterid;	/* The NASID:CPUNUM of the master cpu */
	u32	g_promop;	/* Passes requests from the kernel to prom */
	u32	g_vds;		/* Store the virtual dipswitches here */
	void	**g_hooked_norm;/* ptr to pda loc for norm hndlr */
	void	**g_hooked_utlb;/* ptr to pda loc for utlb hndlr */
	void	**g_hooked_xtlb;/* ptr to pda loc for xtlb hndlr */
	int	g_partid;	/* partition id */
	int	g_symmax;	/* Max symbols in name table. */
	void	*g_dbstab;	/* Address of idbg symbol table */
	char	*g_nametab;	/* Address of idbg name table */
	void	*g_ktext_repmask;
				/* Pointer to a mask of nodes with copies
				 * of the kernel. */
	char	g_padding[56];	/* pad out to 128 bytes */
	nasid_t g_nasidtable[MAX_COMPACT_NODES]; /* NASID of each node,
						  * indexed by cnodeid.
						  */
} gda_t;

#define GDA ((gda_t*) GDA_ADDR(get_nasid()))

#endif /* !__ASSEMBLY__ */
/*
 * Define:	PART_GDA_VERSION
 * Purpose:	Define the minimum version of the GDA required, lower
 *		revisions assume GDA is NOT set up, and read partition
 *		information from the board info.
 */
#define PART_GDA_VERSION	2

/*
 * The following requests can be sent to the PROM during startup.
 */

#define PROMOP_MAGIC		0x0ead0000
#define PROMOP_MAGIC_MASK	0x0fff0000

#define PROMOP_BIST_SHIFT	11
#define PROMOP_BIST_MASK	(0x3 << 11)

#define PROMOP_REG		PI_ERR_STACK_ADDR_A

#define PROMOP_INVALID		(PROMOP_MAGIC | 0x00)
#define PROMOP_HALT		(PROMOP_MAGIC | 0x10)
#define PROMOP_POWERDOWN	(PROMOP_MAGIC | 0x20)
#define PROMOP_RESTART		(PROMOP_MAGIC | 0x30)
#define PROMOP_REBOOT		(PROMOP_MAGIC | 0x40)
#define PROMOP_IMODE		(PROMOP_MAGIC | 0x50)

#define PROMOP_CMD_MASK		0x00f0
#define PROMOP_OPTIONS_MASK	0xfff0

#define PROMOP_SKIP_DIAGS	0x0100		/* don't bother running diags */
#define PROMOP_SKIP_MEMINIT	0x0200		/* don't bother initing memory */
#define PROMOP_SKIP_DEVINIT	0x0400		/* don't bother initing devices */
#define PROMOP_BIST1		0x0800		/* keep track of which BIST ran */
#define PROMOP_BIST2		0x1000		/* keep track of which BIST ran */

#endif /* _ASM_SN_GDA_H */