mirror of https://gitee.com/openkylin/linux.git
83 lines
2.9 KiB
C
83 lines
2.9 KiB
C
/*
|
|
* 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 _ASM_POWERPC_ISERIES_LPAR_MAP_H
|
|
#define _ASM_POWERPC_ISERIES_LPAR_MAP_H
|
|
|
|
#ifndef __ASSEMBLY__
|
|
|
|
#include <asm/types.h>
|
|
|
|
/*
|
|
* The iSeries hypervisor will set up mapping for one or more
|
|
* ESID/VSID pairs (in SLB/segment registers) and will set up
|
|
* mappings of one or more ranges of pages to VAs.
|
|
* We will have the hypervisor set up the ESID->VSID mapping
|
|
* for the four kernel segments (C-F). With shared processors,
|
|
* the hypervisor will clear all segment registers and reload
|
|
* these four whenever the processor is switched from one
|
|
* partition to another.
|
|
*/
|
|
|
|
/* The Vsid and Esid identified below will be used by the hypervisor
|
|
* to set up a memory mapping for part of the load area before giving
|
|
* control to the Linux kernel. The load area is 64 MB, but this must
|
|
* not attempt to map the whole load area. The Hashed Page Table may
|
|
* need to be located within the load area (if the total partition size
|
|
* is 64 MB), but cannot be mapped. Typically, this should specify
|
|
* to map half (32 MB) of the load area.
|
|
*
|
|
* The hypervisor will set up page table entries for the number of
|
|
* pages specified.
|
|
*
|
|
* In 32-bit mode, the hypervisor will load all four of the
|
|
* segment registers (identified by the low-order four bits of the
|
|
* Esid field. In 64-bit mode, the hypervisor will load one SLB
|
|
* entry to map the Esid to the Vsid.
|
|
*/
|
|
|
|
#define HvEsidsToMap 2
|
|
#define HvRangesToMap 1
|
|
|
|
/* Hypervisor initially maps 32MB of the load area */
|
|
#define HvPagesToMap 8192
|
|
|
|
struct LparMap {
|
|
u64 xNumberEsids; // Number of ESID/VSID pairs
|
|
u64 xNumberRanges; // Number of VA ranges to map
|
|
u64 xSegmentTableOffs; // Page number within load area of seg table
|
|
u64 xRsvd[5];
|
|
struct {
|
|
u64 xKernelEsid; // Esid used to map kernel load
|
|
u64 xKernelVsid; // Vsid used to map kernel load
|
|
} xEsids[HvEsidsToMap];
|
|
struct {
|
|
u64 xPages; // Number of pages to be mapped
|
|
u64 xOffset; // Offset from start of load area
|
|
u64 xVPN; // Virtual Page Number
|
|
} xRanges[HvRangesToMap];
|
|
};
|
|
|
|
extern const struct LparMap xLparMap;
|
|
|
|
#endif /* __ASSEMBLY__ */
|
|
|
|
/* the fixed address where the LparMap exists */
|
|
#define LPARMAP_PHYS 0x7000
|
|
|
|
#endif /* _ASM_POWERPC_ISERIES_LPAR_MAP_H */
|