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 
46 typedef 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_NUMNODES]; /* NASID of each node */
64 } gda_t;
65 
66 #define GDA ((gda_t*) GDA_ADDR(get_nasid()))
67 
68 #endif /* !__ASSEMBLY__ */
69 /*
70  * Define:	PART_GDA_VERSION
71  * Purpose:	Define the minimum version of the GDA required, lower
72  *		revisions assume GDA is NOT set up, and read partition
73  *		information from the board info.
74  */
75 #define PART_GDA_VERSION	2
76 
77 /*
78  * The following requests can be sent to the PROM during startup.
79  */
80 
81 #define PROMOP_MAGIC		0x0ead0000
82 #define PROMOP_MAGIC_MASK	0x0fff0000
83 
84 #define PROMOP_BIST_SHIFT	11
85 #define PROMOP_BIST_MASK	(0x3 << 11)
86 
87 #define PROMOP_REG		PI_ERR_STACK_ADDR_A
88 
89 #define PROMOP_INVALID		(PROMOP_MAGIC | 0x00)
90 #define PROMOP_HALT		(PROMOP_MAGIC | 0x10)
91 #define PROMOP_POWERDOWN	(PROMOP_MAGIC | 0x20)
92 #define PROMOP_RESTART		(PROMOP_MAGIC | 0x30)
93 #define PROMOP_REBOOT		(PROMOP_MAGIC | 0x40)
94 #define PROMOP_IMODE		(PROMOP_MAGIC | 0x50)
95 
96 #define PROMOP_CMD_MASK		0x00f0
97 #define PROMOP_OPTIONS_MASK	0xfff0
98 
99 #define PROMOP_SKIP_DIAGS	0x0100		/* don't bother running diags */
100 #define PROMOP_SKIP_MEMINIT	0x0200		/* don't bother initing memory */
101 #define PROMOP_SKIP_DEVINIT	0x0400		/* don't bother initing devices */
102 #define PROMOP_BIST1		0x0800		/* keep track of which BIST ran */
103 #define PROMOP_BIST2		0x1000		/* keep track of which BIST ran */
104 
105 #endif /* _ASM_SN_GDA_H */
106