96 строки
1.9 KiB
ArmAsm
96 строки
1.9 KiB
ArmAsm
/*
|
|
* 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
|