| /* SPDX-License-Identifier: GPL-2.0-or-later */ |
| /* |
| * This file contains low level CPU setup functions. |
| * Copyright (C) 2003 Benjamin Herrenschmidt (benh@kernel.crashing.org) |
| */ |
| |
| #include <asm/processor.h> |
| #include <asm/page.h> |
| #include <asm/cputable.h> |
| #include <asm/ppc_asm.h> |
| #include <asm/asm-offsets.h> |
| #include <asm/cache.h> |
| #include <asm/book3s/64/mmu-hash.h> |
| |
| /* Entry: r3 = crap, r4 = ptr to cputable entry |
| * |
| * Note that we can be called twice for pseudo-PVRs |
| */ |
| _GLOBAL(__setup_cpu_power7) |
| mflr r11 |
| bl __init_hvmode_206 |
| mtlr r11 |
| beqlr |
| li r0,0 |
| mtspr SPRN_LPID,r0 |
| LOAD_REG_IMMEDIATE(r0, PCR_MASK) |
| mtspr SPRN_PCR,r0 |
| mfspr r3,SPRN_LPCR |
| li r4,(LPCR_LPES1 >> LPCR_LPES_SH) |
| bl __init_LPCR_ISA206 |
| mtlr r11 |
| blr |
| |
| _GLOBAL(__restore_cpu_power7) |
| mflr r11 |
| mfmsr r3 |
| rldicl. r0,r3,4,63 |
| beqlr |
| li r0,0 |
| mtspr SPRN_LPID,r0 |
| LOAD_REG_IMMEDIATE(r0, PCR_MASK) |
| mtspr SPRN_PCR,r0 |
| mfspr r3,SPRN_LPCR |
| li r4,(LPCR_LPES1 >> LPCR_LPES_SH) |
| bl __init_LPCR_ISA206 |
| mtlr r11 |
| blr |
| |
| _GLOBAL(__setup_cpu_power8) |
| mflr r11 |
| bl __init_FSCR |
| bl __init_PMU |
| bl __init_PMU_ISA207 |
| bl __init_hvmode_206 |
| mtlr r11 |
| beqlr |
| li r0,0 |
| mtspr SPRN_LPID,r0 |
| LOAD_REG_IMMEDIATE(r0, PCR_MASK) |
| mtspr SPRN_PCR,r0 |
| mfspr r3,SPRN_LPCR |
| ori r3, r3, LPCR_PECEDH |
| li r4,0 /* LPES = 0 */ |
| bl __init_LPCR_ISA206 |
| bl __init_HFSCR |
| bl __init_PMU_HV |
| bl __init_PMU_HV_ISA207 |
| mtlr r11 |
| blr |
| |
| _GLOBAL(__restore_cpu_power8) |
| mflr r11 |
| bl __init_FSCR |
| bl __init_PMU |
| bl __init_PMU_ISA207 |
| mfmsr r3 |
| rldicl. r0,r3,4,63 |
| mtlr r11 |
| beqlr |
| li r0,0 |
| mtspr SPRN_LPID,r0 |
| LOAD_REG_IMMEDIATE(r0, PCR_MASK) |
| mtspr SPRN_PCR,r0 |
| mfspr r3,SPRN_LPCR |
| ori r3, r3, LPCR_PECEDH |
| li r4,0 /* LPES = 0 */ |
| bl __init_LPCR_ISA206 |
| bl __init_HFSCR |
| bl __init_PMU_HV |
| bl __init_PMU_HV_ISA207 |
| mtlr r11 |
| blr |
| |
| _GLOBAL(__setup_cpu_power10) |
| mflr r11 |
| bl __init_FSCR_power10 |
| bl __init_PMU |
| bl __init_PMU_ISA31 |
| b 1f |
| |
| _GLOBAL(__setup_cpu_power9) |
| mflr r11 |
| bl __init_FSCR_power9 |
| bl __init_PMU |
| 1: bl __init_hvmode_206 |
| mtlr r11 |
| beqlr |
| li r0,0 |
| mtspr SPRN_PSSCR,r0 |
| mtspr SPRN_LPID,r0 |
| mtspr SPRN_PID,r0 |
| LOAD_REG_IMMEDIATE(r0, PCR_MASK) |
| mtspr SPRN_PCR,r0 |
| mfspr r3,SPRN_LPCR |
| LOAD_REG_IMMEDIATE(r4, LPCR_PECEDH | LPCR_PECE_HVEE | LPCR_HVICE | LPCR_HEIC) |
| or r3, r3, r4 |
| LOAD_REG_IMMEDIATE(r4, LPCR_UPRT | LPCR_HR) |
| andc r3, r3, r4 |
| li r4,0 /* LPES = 0 */ |
| bl __init_LPCR_ISA300 |
| bl __init_HFSCR |
| bl __init_PMU_HV |
| mtlr r11 |
| blr |
| |
| _GLOBAL(__restore_cpu_power10) |
| mflr r11 |
| bl __init_FSCR_power10 |
| bl __init_PMU |
| bl __init_PMU_ISA31 |
| b 1f |
| |
| _GLOBAL(__restore_cpu_power9) |
| mflr r11 |
| bl __init_FSCR_power9 |
| bl __init_PMU |
| 1: mfmsr r3 |
| rldicl. r0,r3,4,63 |
| mtlr r11 |
| beqlr |
| li r0,0 |
| mtspr SPRN_PSSCR,r0 |
| mtspr SPRN_LPID,r0 |
| mtspr SPRN_PID,r0 |
| LOAD_REG_IMMEDIATE(r0, PCR_MASK) |
| mtspr SPRN_PCR,r0 |
| mfspr r3,SPRN_LPCR |
| LOAD_REG_IMMEDIATE(r4, LPCR_PECEDH | LPCR_PECE_HVEE | LPCR_HVICE | LPCR_HEIC) |
| or r3, r3, r4 |
| LOAD_REG_IMMEDIATE(r4, LPCR_UPRT | LPCR_HR) |
| andc r3, r3, r4 |
| li r4,0 /* LPES = 0 */ |
| bl __init_LPCR_ISA300 |
| bl __init_HFSCR |
| bl __init_PMU_HV |
| mtlr r11 |
| blr |
| |
| __init_hvmode_206: |
| /* Disable CPU_FTR_HVMODE and exit if MSR:HV is not set */ |
| mfmsr r3 |
| rldicl. r0,r3,4,63 |
| bnelr |
| ld r5,CPU_SPEC_FEATURES(r4) |
| LOAD_REG_IMMEDIATE(r6,CPU_FTR_HVMODE | CPU_FTR_P9_TM_HV_ASSIST) |
| andc r5,r5,r6 |
| std r5,CPU_SPEC_FEATURES(r4) |
| blr |
| |
| __init_LPCR_ISA206: |
| /* Setup a sane LPCR: |
| * Called with initial LPCR in R3 and desired LPES 2-bit value in R4 |
| * |
| * LPES = 0b01 (HSRR0/1 used for 0x500) |
| * PECE = 0b111 |
| * DPFD = 4 |
| * HDICE = 0 |
| * VC = 0b100 (VPM0=1, VPM1=0, ISL=0) |
| * VRMASD = 0b10000 (L=1, LP=00) |
| * |
| * Other bits untouched for now |
| */ |
| li r5,0x10 |
| rldimi r3,r5, LPCR_VRMASD_SH, 64-LPCR_VRMASD_SH-5 |
| |
| /* POWER9 has no VRMASD */ |
| __init_LPCR_ISA300: |
| rldimi r3,r4, LPCR_LPES_SH, 64-LPCR_LPES_SH-2 |
| ori r3,r3,(LPCR_PECE0|LPCR_PECE1|LPCR_PECE2) |
| li r5,4 |
| rldimi r3,r5, LPCR_DPFD_SH, 64-LPCR_DPFD_SH-3 |
| clrrdi r3,r3,1 /* clear HDICE */ |
| li r5,4 |
| rldimi r3,r5, LPCR_VC_SH, 0 |
| mtspr SPRN_LPCR,r3 |
| isync |
| blr |
| |
| __init_FSCR_power10: |
| mfspr r3, SPRN_FSCR |
| ori r3, r3, FSCR_PREFIX |
| mtspr SPRN_FSCR, r3 |
| // fall through |
| |
| __init_FSCR_power9: |
| mfspr r3, SPRN_FSCR |
| ori r3, r3, FSCR_SCV |
| mtspr SPRN_FSCR, r3 |
| // fall through |
| |
| __init_FSCR: |
| mfspr r3,SPRN_FSCR |
| ori r3,r3,FSCR_TAR|FSCR_EBB |
| mtspr SPRN_FSCR,r3 |
| blr |
| |
| __init_HFSCR: |
| mfspr r3,SPRN_HFSCR |
| ori r3,r3,HFSCR_TAR|HFSCR_TM|HFSCR_BHRB|HFSCR_PM|\ |
| HFSCR_DSCR|HFSCR_VECVSX|HFSCR_FP|HFSCR_EBB|HFSCR_MSGP |
| mtspr SPRN_HFSCR,r3 |
| blr |
| |
| __init_PMU_HV: |
| li r5,0 |
| mtspr SPRN_MMCRC,r5 |
| blr |
| |
| __init_PMU_HV_ISA207: |
| li r5,0 |
| mtspr SPRN_MMCRH,r5 |
| blr |
| |
| __init_PMU: |
| li r5,0 |
| mtspr SPRN_MMCRA,r5 |
| mtspr SPRN_MMCR0,r5 |
| mtspr SPRN_MMCR1,r5 |
| mtspr SPRN_MMCR2,r5 |
| blr |
| |
| __init_PMU_ISA207: |
| li r5,0 |
| mtspr SPRN_MMCRS,r5 |
| blr |
| |
| __init_PMU_ISA31: |
| li r5,0 |
| mtspr SPRN_MMCR3,r5 |
| LOAD_REG_IMMEDIATE(r5, MMCRA_BHRB_DISABLE) |
| mtspr SPRN_MMCRA,r5 |
| blr |
