https://github.com/torvalds/linux
- HEAD
- refs/heads/arm64-uaccess
- refs/heads/dependabot/pip/drivers/gpu/drm/ci/xfails/certifi-2024.7.4
- refs/heads/dependabot/pip/drivers/gpu/drm/ci/xfails/idna-3.7
- refs/heads/dependabot/pip/drivers/gpu/drm/ci/xfails/requests-2.32.2
- refs/heads/dependabot/pip/drivers/gpu/drm/ci/xfails/setuptools-70.0.0
- refs/heads/dependabot/pip/drivers/gpu/drm/ci/xfails/urllib3-2.2.2
- refs/heads/master
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Tip revision: a102a9ece5489e1718cd7543aa079082450ac3a2 authored by Linus Torvalds on 27 September 2011, 22:48:34 UTC
Linux 3.1-rc8
Linux 3.1-rc8
Tip revision: a102a9e
cpu_setup_power7.S
/*
* 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 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)
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
* HDICE = 0
* VC = 0b100 (VPM0=1, VPM1=0, ISL=0)
* VRMASD = 0b10000 (L=1, LP=00)
*
* Other bits untouched for now
*/
mfspr r3,SPRN_LPCR
li r5,1
rldimi r3,r5, 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
li r5,0x10
rldimi r3,r5, LPCR_VRMASD_SH, 64-LPCR_VRMASD_SH-5
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