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_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 */