gda.h

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/*
 * 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 */