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488f84994c
Presently the LparMap, one of the structures the kernel shares with the legacy iSeries hypervisor has a fixed offset address in head.S. This patch changes this so the LparMap is a normally initialized structure, without fixed address. This allows us to use macros to compute some of the values in the structure, which wasn't previously possible because the assembler always uses signed-% which gets the wrong answers for the computations in question. Unfortunately, a gcc bug means that doing this requires another structure (hvReleaseData) to be initialized in asm instead of C, but on the whole the result is cleaner than before. Signed-off-by: David Gibson <dwg@au1.ibm.com> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
65 lines
2.3 KiB
C
65 lines
2.3 KiB
C
/*
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* HvReleaseData.h
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* Copyright (C) 2001 Mike Corrigan IBM Corporation
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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*/
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#ifndef _HVRELEASEDATA_H
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#define _HVRELEASEDATA_H
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/*
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* This control block contains the critical information about the
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* release so that it can be changed in the future (ie, the virtual
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* address of the OS's NACA).
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*/
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#include <asm/types.h>
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#include <asm/naca.h>
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/*
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* When we IPL a secondary partition, we will check if if the
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* secondary xMinPlicVrmIndex > the primary xVrmIndex.
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* If it is then this tells PLIC that this secondary is not
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* supported running on this "old" of a level of PLIC.
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*
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* Likewise, we will compare the primary xMinSlicVrmIndex to
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* the secondary xVrmIndex.
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* If the primary xMinSlicVrmDelta > secondary xVrmDelta then we
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* know that this PLIC does not support running an OS "that old".
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*/
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#define HVREL_TAGSINACTIVE 0x8000
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#define HVREL_32BIT 0x4000
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#define HVREL_NOSHAREDPROCS 0x2000
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#define HVREL_NOHMT 0x1000
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struct HvReleaseData {
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u32 xDesc; /* Descriptor "HvRD" ebcdic x00-x03 */
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u16 xSize; /* Size of this control block x04-x05 */
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u16 xVpdAreasPtrOffset; /* Offset in NACA of ItVpdAreas x06-x07 */
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struct naca_struct *xSlicNacaAddr; /* Virt addr of SLIC NACA x08-x0F */
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u32 xMsNucDataOffset; /* Offset of Linux Mapping Data x10-x13 */
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u32 xRsvd1; /* Reserved x14-x17 */
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u16 xFlags;
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u16 xVrmIndex; /* VRM Index of OS image x1A-x1B */
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u16 xMinSupportedPlicVrmIndex; /* Min PLIC level (soft) x1C-x1D */
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u16 xMinCompatablePlicVrmIndex; /* Min PLIC levelP (hard) x1E-x1F */
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char xVrmName[12]; /* Displayable name x20-x2B */
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char xRsvd3[20]; /* Reserved x2C-x3F */
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};
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extern struct HvReleaseData hvReleaseData;
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#endif /* _HVRELEASEDATA_H */
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