include/asm-ppc64/iSeries/HvReleaseData.h

   1 /*
   2  * HvReleaseData.h
   3  * Copyright (C) 2001  Mike Corrigan IBM Corporation
   4  *
   5  * This program is free software; you can redistribute it and/or modify
   6  * it under the terms of the GNU General Public License as published by
   7  * the Free Software Foundation; either version 2 of the License, or
   8  * (at your option) any later version.
   9  *
  10  * This program is distributed in the hope that it will be useful,
  11  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  12  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  13  * GNU General Public License for more details.
  14  *
  15  * You should have received a copy of the GNU General Public License
  16  * along with this program; if not, write to the Free Software
  17  * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307 USA
  18  */
  19 #ifndef _HVRELEASEDATA_H
  20 #define _HVRELEASEDATA_H
  21
  22 /*
  23  * This control block contains the critical information about the
  24  * release so that it can be changed in the future (ie, the virtual
  25  * address of the OS's NACA).
  26  */
  27 #include <asm/types.h>
  28 #include <asm/naca.h>
  29
  30 /*
  31  * When we IPL a secondary partition, we will check if if the
  32  * secondary xMinPlicVrmIndex > the primary xVrmIndex.
  33  * If it is then this tells PLIC that this secondary is not
  34  * supported running on this "old" of a level of PLIC.
  35  *
  36  * Likewise, we will compare the primary xMinSlicVrmIndex to
  37  * the secondary xVrmIndex.
  38  * If the primary xMinSlicVrmDelta > secondary xVrmDelta then we
  39  * know that this PLIC does not support running an OS "that old".
  40  */
  41
  42 struct HvReleaseData {
  43         u32     xDesc;          /* Descriptor "HvRD" ebcdic     x00-x03 */
  44         u16     xSize;          /* Size of this control block   x04-x05 */
  45         u16     xVpdAreasPtrOffset; /* Offset in NACA of ItVpdAreas x06-x07 */
  46         struct  naca_struct     *xSlicNacaAddr; /* Virt addr of SLIC NACA x08-x0F */
  47         u32     xMsNucDataOffset; /* Offset of Linux Mapping Data x10-x13 */
  48         u32     xRsvd1;         /* Reserved                     x14-x17 */
  49         u16     xTagsMode:1;    /* 0 == tags active, 1 == tags inactive */
  50         u16     xAddressSize:1; /* 0 == 64-bit, 1 == 32-bit */
  51         u16     xNoSharedProcs:1; /* 0 == shared procs, 1 == no shared */
  52         u16     xNoHMT:1;       /* 0 == allow HMT, 1 == no HMT */
  53         u16     xRsvd2:12;      /* Reserved                     x18-x19 */
  54         u16     xVrmIndex;      /* VRM Index of OS image        x1A-x1B */
  55         u16     xMinSupportedPlicVrmIndex; /* Min PLIC level  (soft) x1C-x1D */
  56         u16     xMinCompatablePlicVrmIndex; /* Min PLIC levelP (hard) x1E-x1F */
  57         char    xVrmName[12];   /* Displayable name             x20-x2B */
  58         char    xRsvd3[20];     /* Reserved                     x2C-x3F */
  59 };
  60
  61 extern struct HvReleaseData     hvReleaseData;
  62
  63 #endif /* _HVRELEASEDATA_H */