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https://github.com/edk2-porting/linux-next.git
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e5a21dd873
Fix a bug in the lv1_get_repository_node_value() routine of the PS3 bootwrapper. Changes in the PS3 system firmware 2.20 cause this bug to hang the system when branching from the bootwrapper to the kernel _start. Since the video system has not yet been enabled at the time the bug is hit, the system hangs with a blank screen. Earlier firmwares don't cause such a catastrophic failure, and so this bug went undetected. Signed-off-by: Geoff Levand <geoffrey.levand@am.sony.com> Signed-off-by: Paul Mackerras <paulus@samba.org>
187 lines
2.9 KiB
ArmAsm
187 lines
2.9 KiB
ArmAsm
/*
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* PS3 bootwrapper hvcalls.
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*
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* Copyright (C) 2007 Sony Computer Entertainment Inc.
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* Copyright 2007 Sony Corp.
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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; version 2 of the License.
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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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#include "ppc_asm.h"
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.machine "ppc64"
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/*
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* The PS3 hypervisor uses a 64 bit "C" language calling convention.
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* The routines here marshal arguments between the 32 bit wrapper
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* program and the 64 bit hvcalls.
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*
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* wrapper lv1
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* 32-bit (h,l) 64-bit
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*
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* 1: r3,r4 <-> r3
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* 2: r5,r6 <-> r4
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* 3: r7,r8 <-> r5
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* 4: r9,r10 <-> r6
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* 5: 8(r1),12(r1) <-> r7
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* 6: 16(r1),20(r1) <-> r8
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* 7: 24(r1),28(r1) <-> r9
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* 8: 32(r1),36(r1) <-> r10
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*
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*/
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.macro GLOBAL name
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.section ".text"
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.balign 4
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.globl \name
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\name:
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.endm
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.macro NO_SUPPORT name
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GLOBAL \name
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b ps3_no_support
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.endm
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.macro HVCALL num
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li r11, \num
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.long 0x44000022
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extsw r3, r3
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.endm
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.macro SAVE_LR offset=4
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mflr r0
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stw r0, \offset(r1)
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.endm
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.macro LOAD_LR offset=4
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lwz r0, \offset(r1)
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mtlr r0
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.endm
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.macro LOAD_64_REG target,high,low
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sldi r11, \high, 32
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or \target, r11, \low
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.endm
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.macro LOAD_64_STACK target,offset
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ld \target, \offset(r1)
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.endm
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.macro LOAD_R3
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LOAD_64_REG r3,r3,r4
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.endm
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.macro LOAD_R4
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LOAD_64_REG r4,r5,r6
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.endm
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.macro LOAD_R5
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LOAD_64_REG r5,r7,r8
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.endm
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.macro LOAD_R6
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LOAD_64_REG r6,r9,r10
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.endm
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.macro LOAD_R7
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LOAD_64_STACK r7,8
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.endm
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.macro LOAD_R8
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LOAD_64_STACK r8,16
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.endm
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.macro LOAD_R9
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LOAD_64_STACK r9,24
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.endm
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.macro LOAD_R10
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LOAD_64_STACK r10,32
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.endm
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.macro LOAD_REGS_0
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stwu 1,-16(1)
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stw 3, 8(1)
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.endm
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.macro LOAD_REGS_5
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LOAD_R3
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LOAD_R4
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LOAD_R5
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LOAD_R6
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LOAD_R7
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.endm
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.macro LOAD_REGS_6
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LOAD_REGS_5
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LOAD_R8
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.endm
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.macro LOAD_REGS_8
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LOAD_REGS_6
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LOAD_R9
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LOAD_R10
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.endm
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.macro STORE_REGS_0_1
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lwz r11, 8(r1)
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std r4, 0(r11)
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mr r4, r3
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li r3, 0
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addi r1,r1,16
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.endm
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.macro STORE_REGS_5_2
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lwz r11, 16(r1)
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std r4, 0(r11)
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lwz r11, 20(r1)
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std r5, 0(r11)
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.endm
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.macro STORE_REGS_6_1
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lwz r11, 24(r1)
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std r4, 0(r11)
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.endm
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GLOBAL lv1_get_logical_ppe_id
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SAVE_LR
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LOAD_REGS_0
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HVCALL 69
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STORE_REGS_0_1
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LOAD_LR
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blr
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GLOBAL lv1_get_logical_partition_id
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SAVE_LR
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LOAD_REGS_0
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HVCALL 74
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STORE_REGS_0_1
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LOAD_LR
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blr
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GLOBAL lv1_get_repository_node_value
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SAVE_LR
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LOAD_REGS_5
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HVCALL 91
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STORE_REGS_5_2
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LOAD_LR
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blr
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GLOBAL lv1_panic
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SAVE_LR
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LOAD_REGS_8
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HVCALL 255
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LOAD_LR
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blr
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