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 * Derived from IRIX <sys/SN/gda.h>.
7 *
8 * Copyright (C) 1992 - 1997, 2000 Silicon Graphics, Inc.
9 *
10 * gda.h -- Contains the data structure for the global data area,
11 * 	The GDA contains information communicated between the
12 *	PROM, SYMMON, and the kernel.
13 */
14#ifndef _ASM_SN_GDA_H
15#define _ASM_SN_GDA_H
16
17#include <asm/sn/addrs.h>
18
19#define GDA_MAGIC	0x58464552
20
21/*
22 * GDA Version History
23 *
24 * Version #	| Change
25 * -------------+-------------------------------------------------------
26 * 	1	| Initial SN0 version
27 * 	2	| Prom sets g_partid field to the partition number. 0 IS
28 *		| a valid partition #.
29 */
30
31#define GDA_VERSION	2	/* Current GDA version # */
32
33#define G_MAGICOFF	0
34#define G_VERSIONOFF	4
35#define G_PROMOPOFF	6
36#define G_MASTEROFF	8
37#define G_VDSOFF	12
38#define G_HKDNORMOFF	16
39#define G_HKDUTLBOFF	24
40#define G_HKDXUTLBOFF	32
41#define G_PARTIDOFF	40
42#define G_TABLEOFF	128
43
44#ifndef __ASSEMBLY__
45
46typedef struct gda {
47	u32	g_magic;	/* GDA magic number */
48	u16	g_version;	/* Version of this structure */
49	u16	g_masterid;	/* The NASID:CPUNUM of the master cpu */
50	u32	g_promop;	/* Passes requests from the kernel to prom */
51	u32	g_vds;		/* Store the virtual dipswitches here */
52	void	**g_hooked_norm;/* ptr to pda loc for norm hndlr */
53	void	**g_hooked_utlb;/* ptr to pda loc for utlb hndlr */
54	void	**g_hooked_xtlb;/* ptr to pda loc for xtlb hndlr */
55	int	g_partid;	/* partition id */
56	int	g_symmax;	/* Max symbols in name table. */
57	void	*g_dbstab;	/* Address of idbg symbol table */
58	char	*g_nametab;	/* Address of idbg name table */
59	void	*g_ktext_repmask;
60				/* Pointer to a mask of nodes with copies
61				 * of the kernel. */
62	char	g_padding[56];	/* pad out to 128 bytes */
63	nasid_t	g_nasidtable[MAX_COMPACT_NODES]; /* NASID of each node,
64						  * indexed by cnodeid.
65						  */
66} gda_t;
67
68#define GDA ((gda_t*) GDA_ADDR(get_nasid()))
69
70#endif /* !__ASSEMBLY__ */
71/*
72 * Define:	PART_GDA_VERSION
73 * Purpose:	Define the minimum version of the GDA required, lower
74 *		revisions assume GDA is NOT set up, and read partition
75 *		information from the board info.
76 */
77#define	PART_GDA_VERSION	2
78
79/*
80 * The following requests can be sent to the PROM during startup.
81 */
82
83#define PROMOP_MAGIC		0x0ead0000
84#define PROMOP_MAGIC_MASK	0x0fff0000
85
86#define PROMOP_BIST_SHIFT       11
87#define PROMOP_BIST_MASK        (0x3 << 11)
88
89#define PROMOP_REG		PI_ERR_STACK_ADDR_A
90
91#define PROMOP_INVALID		(PROMOP_MAGIC | 0x00)
92#define PROMOP_HALT             (PROMOP_MAGIC | 0x10)
93#define PROMOP_POWERDOWN        (PROMOP_MAGIC | 0x20)
94#define PROMOP_RESTART          (PROMOP_MAGIC | 0x30)
95#define PROMOP_REBOOT           (PROMOP_MAGIC | 0x40)
96#define PROMOP_IMODE            (PROMOP_MAGIC | 0x50)
97
98#define PROMOP_CMD_MASK		0x00f0
99#define PROMOP_OPTIONS_MASK	0xfff0
100
101#define PROMOP_SKIP_DIAGS	0x0100		/* don't bother running diags */
102#define PROMOP_SKIP_MEMINIT	0x0200		/* don't bother initing memory */
103#define PROMOP_SKIP_DEVINIT	0x0400		/* don't bother initing devices */
104#define PROMOP_BIST1		0x0800		/* keep track of which BIST ran */
105#define PROMOP_BIST2		0x1000		/* keep track of which BIST ran */
106
107#endif /* _ASM_SN_GDA_H */
108