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