| /* |
| * This file contains low level CPU setup functions. |
| * Copyright (C) 2003 Benjamin Herrenschmidt (benh@kernel.crashing.org) |
| * |
| * 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. |
| * |
| */ |
| |
| #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> |
| |
| /* 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 |
| bl __init_LPCR |
| bl __init_TLB |
| mtlr r11 |
| blr |
| |
| _GLOBAL(__restore_cpu_power7) |
| mflr r11 |
| mfmsr r3 |
| rldicl. r0,r3,4,63 |
| beqlr |
| li r0,0 |
| mtspr SPRN_LPID,r0 |
| bl __init_LPCR |
| bl __init_TLB |
| mtlr r11 |
| blr |
| |
| __init_hvmode_206: |
| /* Disable CPU_FTR_HVMODE_206 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_206) |
| xor r5,r5,r6 |
| std r5,CPU_SPEC_FEATURES(r4) |
| blr |
| |
| __init_LPCR: |
| /* Setup a sane LPCR: |
| * |
| * LPES = 0b01 (HSRR0/1 used for 0x500) |
| * PECE = 0b111 |
| * DPFD = 4 |
| * |
| * Other bits untouched for now |
| */ |
| mfspr r3,SPRN_LPCR |
| ori r3,r3,(LPCR_LPES0|LPCR_LPES1) |
| xori r3,r3, LPCR_LPES0 |
| ori r3,r3,(LPCR_PECE0|LPCR_PECE1|LPCR_PECE2) |
| li r5,7 |
| sldi r5,r5,LPCR_DPFD_SH |
| andc r3,r3,r5 |
| li r5,4 |
| sldi r5,r5,LPCR_DPFD_SH |
| or r3,r3,r5 |
| mtspr SPRN_LPCR,r3 |
| isync |
| blr |
| |
| __init_TLB: |
| /* Clear the TLB */ |
| li r6,128 |
| mtctr r6 |
| li r7,0xc00 /* IS field = 0b11 */ |
| ptesync |
| 2: tlbiel r7 |
| addi r7,r7,0x1000 |
| bdnz 2b |
| ptesync |
| 1: blr |
