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diff --git a/include/asm-ppc64/iSeries/HvReleaseData.h b/include/asm-ppc64/iSeries/HvReleaseData.h
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+/*
+ * HvReleaseData.h
+ * Copyright (C) 2001 Mike Corrigan IBM Corporation
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
+ */
+#ifndef _HVRELEASEDATA_H
+#define _HVRELEASEDATA_H
+
+//=============================================================================
+//
+// This control block contains the critical information about the
+// release so that it can be changed in the future (ie, the virtual
+// address of the OS's NACA).
+//
+#include <asm/types.h>
+#include <asm/naca.h>
+
+//=============================================================================
+//
+// When we IPL a secondary partition, we will check if if the
+// secondary xMinPlicVrmIndex > the primary xVrmIndex.
+// If it is then this tells PLIC that this secondary is not
+// supported running on this "old" of a level of PLIC.
+//
+// Likewise, we will compare the primary xMinSlicVrmIndex to
+// the secondary xVrmIndex.
+// If the primary xMinSlicVrmDelta > secondary xVrmDelta then we
+// know that this PLIC does not support running an OS "that old".
+//
+//=============================================================================
+
+struct HvReleaseData
+{
+ u32 xDesc; // Descriptor "HvRD" ebcdic x00-x03
+ u16 xSize; // Size of this control block x04-x05
+ u16 xVpdAreasPtrOffset; // Offset in NACA of ItVpdAreas x06-x07
+ struct naca_struct * xSlicNacaAddr; // Virt addr of SLIC NACA x08-x0F
+ u32 xMsNucDataOffset; // Offset of Linux Mapping Data x10-x13
+ u32 xRsvd1; // Reserved x14-x17
+ u16 xTagsMode:1; // 0 == tags active, 1 == tags inactive
+ u16 xAddressSize:1; // 0 == 64-bit, 1 == 32-bit
+ u16 xNoSharedProcs:1; // 0 == shared procs, 1 == no shared
+ u16 xNoHMT:1; // 0 == allow HMT, 1 == no HMT
+ u16 xRsvd2:12; // Reserved x18-x19
+ u16 xVrmIndex; // VRM Index of OS image x1A-x1B
+ u16 xMinSupportedPlicVrmIndex;// Min PLIC level (soft) x1C-x1D
+ u16 xMinCompatablePlicVrmIndex;// Min PLIC levelP (hard) x1E-x1F
+ char xVrmName[12]; // Displayable name x20-x2B
+ char xRsvd3[20]; // Reserved x2C-x3F
+};
+
+#endif /* _HVRELEASEDATA_H */
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