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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, version 2, as
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* published by the Free Software Foundation.
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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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* 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, 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
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* Copyright SUSE Linux Products GmbH 2009
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* Authors: Alexander Graf <agraf@suse.de>
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/******************************************************************************
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*****************************************************************************/
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.macro LOAD_GUEST_SEGMENTS
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* all other volatile GPRS = free except R4, R6
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* SVCPU[CR] = guest CR
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* SVCPU[XER] = guest XER
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* SVCPU[CTR] = guest CTR
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* SVCPU[LR] = guest LR
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#define XCHG_SR(n) lwz r9, (SVCPU_SR+(n*4))(r3); \
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#define KVM_KILL_BAT(n, reg) \
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mtspr SPRN_IBAT##n##U,reg; \
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mtspr SPRN_IBAT##n##L,reg; \
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mtspr SPRN_DBAT##n##U,reg; \
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mtspr SPRN_DBAT##n##L,reg; \
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/******************************************************************************
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*****************************************************************************/
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.macro LOAD_HOST_SEGMENTS
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/* Register usage at this point:
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* R12 = exit handler id
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* R13 = shadow vcpu - SHADOW_VCPU_OFF
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* SVCPU[CR] = guest CR
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* SVCPU[XER] = guest XER
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* SVCPU[CTR] = guest CTR
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* SVCPU[LR] = guest LR
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/* We only overwrite the upper part, so we only restoree
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#define KVM_LOAD_BAT(n, reg, RA, RB) \
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lwz RA,(n*16)+0(reg); \
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lwz RB,(n*16)+4(reg); \
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mtspr SPRN_IBAT##n##U,RA; \
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mtspr SPRN_IBAT##n##L,RB; \
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lwz RA,(n*16)+8(reg); \
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lwz RB,(n*16)+12(reg); \
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mtspr SPRN_DBAT##n##U,RA; \
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mtspr SPRN_DBAT##n##L,RB; \
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KVM_LOAD_BAT(0, r9, r10, r11)
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KVM_LOAD_BAT(1, r9, r10, r11)
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KVM_LOAD_BAT(2, r9, r10, r11)
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KVM_LOAD_BAT(3, r9, r10, r11)
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/* Restore Segment Registers */
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LOAD_REG_IMMEDIATE(r3, 0x20000000 | (0x111 * 0xc))
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addi r3, r3, 0x111 /* increment VSID */
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addis r4, r4, 0x1000 /* address of next segment */
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/* 'current->mm' needs to be in r4 */
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/* This only clobbers r0, r3, r4 and r5 */
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bl switch_mmu_context