ebf0b6a8b1
Merge our fixes branch from the 4.15 cycle. Unusually the fixes branch saw some significant features merged, notably the RFI flush patches, so we want the code in next to be tested against that, to avoid any surprises when the two are merged. There's also some other work on the panic handling that was reverted in fixes and we now want to do properly in next, which would conflict. And we also fix a few other minor merge conflicts.
213 lines
4.1 KiB
ArmAsm
213 lines
4.1 KiB
ArmAsm
/*
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* This file contains low level CPU setup functions.
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* Copyright (C) 2003 Benjamin Herrenschmidt (benh@kernel.crashing.org)
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation; either version
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* 2 of the License, or (at your option) any later version.
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*
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*/
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#include <asm/processor.h>
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#include <asm/page.h>
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#include <asm/cputable.h>
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#include <asm/ppc_asm.h>
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#include <asm/asm-offsets.h>
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#include <asm/cache.h>
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#include <asm/book3s/64/mmu-hash.h>
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/* Entry: r3 = crap, r4 = ptr to cputable entry
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*
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* Note that we can be called twice for pseudo-PVRs
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*/
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_GLOBAL(__setup_cpu_power7)
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mflr r11
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bl __init_hvmode_206
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mtlr r11
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beqlr
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li r0,0
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mtspr SPRN_LPID,r0
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mfspr r3,SPRN_LPCR
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li r4,(LPCR_LPES1 >> LPCR_LPES_SH)
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bl __init_LPCR_ISA206
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mtlr r11
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blr
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_GLOBAL(__restore_cpu_power7)
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mflr r11
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mfmsr r3
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rldicl. r0,r3,4,63
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beqlr
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li r0,0
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mtspr SPRN_LPID,r0
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mfspr r3,SPRN_LPCR
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li r4,(LPCR_LPES1 >> LPCR_LPES_SH)
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bl __init_LPCR_ISA206
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mtlr r11
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blr
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_GLOBAL(__setup_cpu_power8)
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mflr r11
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bl __init_FSCR
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bl __init_PMU
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bl __init_PMU_ISA207
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bl __init_hvmode_206
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mtlr r11
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beqlr
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li r0,0
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mtspr SPRN_LPID,r0
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mfspr r3,SPRN_LPCR
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ori r3, r3, LPCR_PECEDH
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li r4,0 /* LPES = 0 */
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bl __init_LPCR_ISA206
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bl __init_HFSCR
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bl __init_PMU_HV
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bl __init_PMU_HV_ISA207
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mtlr r11
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blr
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_GLOBAL(__restore_cpu_power8)
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mflr r11
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bl __init_FSCR
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bl __init_PMU
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bl __init_PMU_ISA207
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mfmsr r3
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rldicl. r0,r3,4,63
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mtlr r11
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beqlr
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li r0,0
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mtspr SPRN_LPID,r0
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mfspr r3,SPRN_LPCR
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ori r3, r3, LPCR_PECEDH
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li r4,0 /* LPES = 0 */
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bl __init_LPCR_ISA206
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bl __init_HFSCR
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bl __init_PMU_HV
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bl __init_PMU_HV_ISA207
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mtlr r11
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blr
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_GLOBAL(__setup_cpu_power9)
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mflr r11
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bl __init_FSCR
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bl __init_PMU
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bl __init_hvmode_206
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mtlr r11
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beqlr
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li r0,0
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mtspr SPRN_PSSCR,r0
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mtspr SPRN_LPID,r0
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mtspr SPRN_PID,r0
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mfspr r3,SPRN_LPCR
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LOAD_REG_IMMEDIATE(r4, LPCR_PECEDH | LPCR_PECE_HVEE | LPCR_HVICE | LPCR_HEIC)
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or r3, r3, r4
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LOAD_REG_IMMEDIATE(r4, LPCR_UPRT | LPCR_HR)
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andc r3, r3, r4
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li r4,0 /* LPES = 0 */
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bl __init_LPCR_ISA300
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bl __init_HFSCR
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bl __init_PMU_HV
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mtlr r11
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blr
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_GLOBAL(__restore_cpu_power9)
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mflr r11
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bl __init_FSCR
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bl __init_PMU
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mfmsr r3
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rldicl. r0,r3,4,63
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mtlr r11
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beqlr
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li r0,0
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mtspr SPRN_PSSCR,r0
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mtspr SPRN_LPID,r0
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mtspr SPRN_PID,r0
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mfspr r3,SPRN_LPCR
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LOAD_REG_IMMEDIATE(r4, LPCR_PECEDH | LPCR_PECE_HVEE | LPCR_HVICE | LPCR_HEIC)
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or r3, r3, r4
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LOAD_REG_IMMEDIATE(r4, LPCR_UPRT | LPCR_HR)
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andc r3, r3, r4
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li r4,0 /* LPES = 0 */
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bl __init_LPCR_ISA300
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bl __init_HFSCR
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bl __init_PMU_HV
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mtlr r11
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blr
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__init_hvmode_206:
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/* Disable CPU_FTR_HVMODE and exit if MSR:HV is not set */
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mfmsr r3
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rldicl. r0,r3,4,63
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bnelr
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ld r5,CPU_SPEC_FEATURES(r4)
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LOAD_REG_IMMEDIATE(r6,CPU_FTR_HVMODE)
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xor r5,r5,r6
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std r5,CPU_SPEC_FEATURES(r4)
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blr
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__init_LPCR_ISA206:
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/* Setup a sane LPCR:
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* Called with initial LPCR in R3 and desired LPES 2-bit value in R4
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*
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* LPES = 0b01 (HSRR0/1 used for 0x500)
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* PECE = 0b111
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* DPFD = 4
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* HDICE = 0
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* VC = 0b100 (VPM0=1, VPM1=0, ISL=0)
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* VRMASD = 0b10000 (L=1, LP=00)
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*
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* Other bits untouched for now
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*/
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li r5,0x10
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rldimi r3,r5, LPCR_VRMASD_SH, 64-LPCR_VRMASD_SH-5
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/* POWER9 has no VRMASD */
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__init_LPCR_ISA300:
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rldimi r3,r4, LPCR_LPES_SH, 64-LPCR_LPES_SH-2
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ori r3,r3,(LPCR_PECE0|LPCR_PECE1|LPCR_PECE2)
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li r5,4
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rldimi r3,r5, LPCR_DPFD_SH, 64-LPCR_DPFD_SH-3
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clrrdi r3,r3,1 /* clear HDICE */
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li r5,4
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rldimi r3,r5, LPCR_VC_SH, 0
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mtspr SPRN_LPCR,r3
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isync
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blr
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__init_FSCR:
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mfspr r3,SPRN_FSCR
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ori r3,r3,FSCR_TAR|FSCR_DSCR|FSCR_EBB
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mtspr SPRN_FSCR,r3
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blr
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__init_HFSCR:
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mfspr r3,SPRN_HFSCR
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ori r3,r3,HFSCR_TAR|HFSCR_TM|HFSCR_BHRB|HFSCR_PM|\
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HFSCR_DSCR|HFSCR_VECVSX|HFSCR_FP|HFSCR_EBB|HFSCR_MSGP
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mtspr SPRN_HFSCR,r3
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blr
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__init_PMU_HV:
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li r5,0
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mtspr SPRN_MMCRC,r5
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blr
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__init_PMU_HV_ISA207:
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li r5,0
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mtspr SPRN_MMCRH,r5
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blr
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__init_PMU:
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li r5,0
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mtspr SPRN_MMCRA,r5
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mtspr SPRN_MMCR0,r5
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mtspr SPRN_MMCR1,r5
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mtspr SPRN_MMCR2,r5
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blr
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__init_PMU_ISA207:
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li r5,0
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mtspr SPRN_MMCRS,r5
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blr
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