arch/x86/include/sys/mc.h

   1 /*
   2  * CDDL HEADER START
   3  *
   4  * The contents of this file are subject to the terms of the
   5  * Common Development and Distribution License (the "License").
   6  * You may not use this file except in compliance with the License.
   7  *
   8  * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
   9  * or http://www.opensolaris.org/os/licensing.
  10  * See the License for the specific language governing permissions
  11  * and limitations under the License.
  12  *
  13  * When distributing Covered Code, include this CDDL HEADER in each
  14  * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
  15  * If applicable, add the following below this CDDL HEADER, with the
  16  * fields enclosed by brackets "[]" replaced with your own identifying
  17  * information: Portions Copyright [yyyy] [name of copyright owner]
  18  *
  19  * CDDL HEADER END
  20  *
  21  * Copyright 2007 Sun Microsystems, Inc.  All rights reserved.
  22  * Use is subject to license terms.
  23  */
  24
  25 #ifndef _SYS_MC_H
  26 #define _SYS_MC_H
  27
  28 #pragma ident   "%Z%%M% %I%     %E% SMI"
  29
  30 /*
  31  * Public interfaces exposed by the memory controller driver
  32  */
  33
  34 #include <sys/cpuvar.h>
  35
  36 #ifdef __cplusplus
  37 extern "C" {
  38 #endif
  39
  40 #define MC_UNUM_NAMLEN          192
  41 #define MC_UNUM_NDIMM           2
  42
  43 typedef struct mc_unum {
  44         int unum_board;                 /* system board */
  45         int unum_chip;                  /* chip/socket */
  46         int unum_mc;                    /* memory-controller or branch */
  47         int unum_chan;                  /* DRAM channel */
  48         int unum_cs;                    /* chip-select */
  49         int unum_rank;                  /* rank */
  50         uint64_t unum_offset;           /* row, column, bank-select etc */
  51         int unum_dimms[MC_UNUM_NDIMM];
  52 } mc_unum_t;
  53
  54 /*
  55  * Invalid marker used in some numeric properties
  56  */
  57 #define MC_INVALNUM             ((uint32_t)-1)
  58
  59 /*
  60  * /dev/mc/mc* ioctl cmds
  61  */
  62 #define MC_IOC                  (0x4d43 << 16)
  63 #define MC_IOC_SNAPSHOT_INFO    (MC_IOC | 1)
  64 #define MC_IOC_SNAPSHOT         (MC_IOC | 2)
  65 #define MC_IOC_ONLINESPARE_EN   (MC_IOC | 4)
  66
  67 /*
  68  * Prior to requesting a copy of the snapshot, consumers are advised to request
  69  * information regarding the snapshot.  An mc_snapshot_info_t will be returned,
  70  * containing the snapshot size as well as the snapshot generation number.  Note
  71  * that, due to the potentially dynamic nature of the system, the snapshot may
  72  * change at any time.  As such, the information in the mc_snapshot_info_t may
  73  * be out of date by the time it is used.  The generation number is used to
  74  * track snapshot changes.  That is, the generation number will be updated each
  75  * time the source data for the snapshot is updated.  The consumer should not
  76  * attach any meaning to the magnitude of a generation number change, and pay
  77  * attention only to the fact that the number has changed.
  78  */
  79 typedef struct mc_snapshot_info {
  80         uint32_t mcs_size;      /* snapshot size */
  81         uint_t mcs_gen;         /* snapshot generation number */
  82 } mc_snapshot_info_t;
  83
  84 #ifdef __cplusplus
  85 }
  86 #endif
  87
  88 #endif /* _SYS_MC_H */