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linux/arch/powerpc/kernel/cpu_setup_ppc970.S

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Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
2005-04-16 15:20:36 -07:00
/*
* 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>
kbuild: m68k,parisc,ppc,ppc64,s390,xtensa use generic asm-offsets.h support Delete obsoleted parts form arch makefiles and rename to asm-offsets.h Signed-off-by: Sam Ravnborg <sam@ravnborg.org>
2005-09-09 11:57:26 -07:00
#include <asm/asm-offsets.h>
Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
2005-04-16 15:20:36 -07:00
#include <asm/cache.h>
[POWERPC] Cleanup CPU inits Cleanup CPU inits a bit more, Geoff Levand already did some earlier. * Move CPU state save to cpu_setup, since cpu_setup is only ever done on cpu 0 on 64-bit and save is never done more than once. * Rename __restore_cpu_setup to __restore_cpu_ppc970 and add function pointers to the cputable to use instead. Powermac always has 970 so no need to check there. * Rename __970_cpu_preinit to __cpu_preinit_ppc970 and check PVR before calling it instead of in it, it's too early to use cputable. * Rename pSeries_secondary_smp_init to generic_secondary_smp_init since everyone but powermac and iSeries use it. Signed-off-by: Olof Johansson <olof@lixom.net> Signed-off-by: Paul Mackerras <paulus@samba.org>
2006-08-10 22:07:08 -07:00
_GLOBAL(__cpu_preinit_ppc970)
/* Do nothing if not running in HV mode */
Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
2005-04-16 15:20:36 -07:00
mfmsr r0
rldicl. r0,r0,4,63
beqlr
/* Make sure HID4:rm_ci is off before MMU is turned off, that large
* pages are enabled with HID4:61 and clear HID5:DCBZ_size and
* HID5:DCBZ32_ill
*/
li r0,0
mfspr r3,SPRN_HID4
rldimi r3,r0,40,23 /* clear bit 23 (rm_ci) */
rldimi r3,r0,2,61 /* clear bit 61 (lg_pg_en) */
sync
mtspr SPRN_HID4,r3
isync
sync
mfspr r3,SPRN_HID5
rldimi r3,r0,6,56 /* clear bits 56 & 57 (DCBZ*) */
sync
mtspr SPRN_HID5,r3
isync
sync
/* Setup some basic HID1 features */
mfspr r0,SPRN_HID1
li r3,0x1200 /* enable i-fetch cacheability */
sldi r3,r3,44 /* and prefetch */
or r0,r0,r3
mtspr SPRN_HID1,r0
mtspr SPRN_HID1,r0
isync
/* Clear HIOR */
li r0,0
sync
mtspr SPRN_HIOR,0 /* Clear interrupt prefix */
isync
blr
/* Definitions for the table use to save CPU states */
#define CS_HID0 0
#define CS_HID1 8
#define CS_HID4 16
#define CS_HID5 24
#define CS_SIZE 32
.data
.balign L1_CACHE_BYTES,0
[PATCH] powerpc: Move various ppc64 files with no ppc32 equivalent to powerpc This patch moves a bunch of files from arch/ppc64 and include/asm-ppc64 which have no equivalents in ppc32 code into arch/powerpc and include/asm-powerpc. The file affected are: abs_addr.h compat.h lppaca.h paca.h tce.h cpu_setup_power4.S ioctl32.c firmware.c pacaData.c The only changes apart from the move and corresponding Makefile changes are: - #ifndef/#define in includes updated to _ASM_POWERPC_ form - trailing whitespace removed - comments giving full paths removed - pacaData.c renamed paca.c to remove studlyCaps - Misplaced { moved in lppaca.h Built and booted on POWER5 LPAR (ARCH=powerpc and ARCH=ppc64), built for 32-bit powermac (ARCH=powerpc). Signed-off-by: David Gibson <david@gibson.dropbear.id.au> Signed-off-by: Paul Mackerras <paulus@samba.org>
2005-11-08 19:38:01 -07:00
cpu_state_storage:
Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
2005-04-16 15:20:36 -07:00
.space CS_SIZE
.balign L1_CACHE_BYTES,0
.text
[PATCH] powerpc: Move various ppc64 files with no ppc32 equivalent to powerpc This patch moves a bunch of files from arch/ppc64 and include/asm-ppc64 which have no equivalents in ppc32 code into arch/powerpc and include/asm-powerpc. The file affected are: abs_addr.h compat.h lppaca.h paca.h tce.h cpu_setup_power4.S ioctl32.c firmware.c pacaData.c The only changes apart from the move and corresponding Makefile changes are: - #ifndef/#define in includes updated to _ASM_POWERPC_ form - trailing whitespace removed - comments giving full paths removed - pacaData.c renamed paca.c to remove studlyCaps - Misplaced { moved in lppaca.h Built and booted on POWER5 LPAR (ARCH=powerpc and ARCH=ppc64), built for 32-bit powermac (ARCH=powerpc). Signed-off-by: David Gibson <david@gibson.dropbear.id.au> Signed-off-by: Paul Mackerras <paulus@samba.org>
2005-11-08 19:38:01 -07:00
Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
2005-04-16 15:20:36 -07:00
[POWERPC] Cleanup CPU inits Cleanup CPU inits a bit more, Geoff Levand already did some earlier. * Move CPU state save to cpu_setup, since cpu_setup is only ever done on cpu 0 on 64-bit and save is never done more than once. * Rename __restore_cpu_setup to __restore_cpu_ppc970 and add function pointers to the cputable to use instead. Powermac always has 970 so no need to check there. * Rename __970_cpu_preinit to __cpu_preinit_ppc970 and check PVR before calling it instead of in it, it's too early to use cputable. * Rename pSeries_secondary_smp_init to generic_secondary_smp_init since everyone but powermac and iSeries use it. Signed-off-by: Olof Johansson <olof@lixom.net> Signed-off-by: Paul Mackerras <paulus@samba.org>
2006-08-10 22:07:08 -07:00
_GLOBAL(__setup_cpu_ppc970)
/* Do nothing if not running in HV mode */
[POWERPC] Don't access HID registers if running on a Hypervisor. The following patch avoids accessing Hypervisor privilege HID registers when running on a Hypervisor (MSR[HV]=0). Signed-off-by: Jimi Xenidis <jimix@watson.ibm.com> Signed-off-by: Paul Mackerras <paulus@samba.org>
2006-06-21 16:15:55 -07:00
mfmsr r0
rldicl. r0,r0,4,63
[POWERPC] Cleanup CPU inits Cleanup CPU inits a bit more, Geoff Levand already did some earlier. * Move CPU state save to cpu_setup, since cpu_setup is only ever done on cpu 0 on 64-bit and save is never done more than once. * Rename __restore_cpu_setup to __restore_cpu_ppc970 and add function pointers to the cputable to use instead. Powermac always has 970 so no need to check there. * Rename __970_cpu_preinit to __cpu_preinit_ppc970 and check PVR before calling it instead of in it, it's too early to use cputable. * Rename pSeries_secondary_smp_init to generic_secondary_smp_init since everyone but powermac and iSeries use it. Signed-off-by: Olof Johansson <olof@lixom.net> Signed-off-by: Paul Mackerras <paulus@samba.org>
2006-08-10 22:07:08 -07:00
beqlr
mfspr r0,SPRN_HID0
li r11,5 /* clear DOZE and SLEEP */
rldimi r0,r11,52,8 /* set NAP and DPM */
Merge branch 'merge'
2006-08-24 21:56:07 -07:00
li r11,0
rldimi r0,r11,32,31 /* clear EN_ATTN */
[POWERPC] powerpc: Enable DEEPNAP power savings mode on 970MP Without this patch, on an idle system I get: cpu-power-0:21.638 cpu-power-1:27.102 cpu-power-2:29.343 cpu-power-3:25.784 Total: 103.8W With this patch: cpu-power-0:11.730 cpu-power-1:17.185 cpu-power-2:18.547 cpu-power-3:17.528 Total: 65.0W If I lower HZ to 100, I can get it as low as: cpu-power-0:10.938 cpu-power-1:16.021 cpu-power-2:17.245 cpu-power-3:16.145 Total: 60.2W Another (older) Quad G5 went from 54W to 39W at HZ=250. Coming back out of Deep Nap takes 40-70 cycles longer than coming back from just Nap (which already takes quite a while). I don't think it'll be a performance issue (interrupt latency on an idle system), but in case someone does measurements feel free to report them. Signed-off-by: Olof Johansson <olof@lixom.net> Acked-by: Michael Buesch <mb@bu3sch.de> Signed-off-by: Paul Mackerras <paulus@samba.org>
2006-10-04 21:41:41 -07:00
b load_hids /* Jump to shared code */
_GLOBAL(__setup_cpu_ppc970MP)
/* Do nothing if not running in HV mode */
mfmsr r0
rldicl. r0,r0,4,63
beqlr
mfspr r0,SPRN_HID0
li r11,0x15 /* clear DOZE and SLEEP */
rldimi r0,r11,52,6 /* set DEEPNAP, NAP and DPM */
li r11,0
rldimi r0,r11,32,31 /* clear EN_ATTN */
load_hids:
[POWERPC] Cleanup CPU inits Cleanup CPU inits a bit more, Geoff Levand already did some earlier. * Move CPU state save to cpu_setup, since cpu_setup is only ever done on cpu 0 on 64-bit and save is never done more than once. * Rename __restore_cpu_setup to __restore_cpu_ppc970 and add function pointers to the cputable to use instead. Powermac always has 970 so no need to check there. * Rename __970_cpu_preinit to __cpu_preinit_ppc970 and check PVR before calling it instead of in it, it's too early to use cputable. * Rename pSeries_secondary_smp_init to generic_secondary_smp_init since everyone but powermac and iSeries use it. Signed-off-by: Olof Johansson <olof@lixom.net> Signed-off-by: Paul Mackerras <paulus@samba.org>
2006-08-10 22:07:08 -07:00
mtspr SPRN_HID0,r0
mfspr r0,SPRN_HID0
mfspr r0,SPRN_HID0
mfspr r0,SPRN_HID0
mfspr r0,SPRN_HID0
mfspr r0,SPRN_HID0
mfspr r0,SPRN_HID0
sync
isync
/* Save away cpu state */
powerpc: Use LOAD_REG_IMMEDIATE only for constants on 64-bit Using LOAD_REG_IMMEDIATE to get the address of kernel symbols generates 5 instructions where LOAD_REG_ADDR can do it in one, and will generate R_PPC64_ADDR16_* relocations in the output when we get to making the kernel as a position-independent executable, which we'd rather not have to handle. This changes various bits of assembly code to use LOAD_REG_ADDR when we need to get the address of a symbol, or to use suitable position-independent code for cases where we can't access the TOC for various reasons, or if we're not running at the address we were linked at. It also cleans up a few minor things; there's no reason to save and restore SRR0/1 around RTAS calls, __mmu_off can get the return address from LR more conveniently than the caller can supply it in R4 (and we already assume elsewhere that EA == RA if the MMU is on in early boot), and enable_64b_mode was using 5 instructions where 2 would do. Signed-off-by: Paul Mackerras <paulus@samba.org>
2008-08-29 18:41:12 -07:00
LOAD_REG_ADDR(r5,cpu_state_storage)
[POWERPC] Don't access HID registers if running on a Hypervisor. The following patch avoids accessing Hypervisor privilege HID registers when running on a Hypervisor (MSR[HV]=0). Signed-off-by: Jimi Xenidis <jimix@watson.ibm.com> Signed-off-by: Paul Mackerras <paulus@samba.org>
2006-06-21 16:15:55 -07:00
/* Save HID0,1,4 and 5 */
Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
2005-04-16 15:20:36 -07:00
mfspr r3,SPRN_HID0
std r3,CS_HID0(r5)
mfspr r3,SPRN_HID1
std r3,CS_HID1(r5)
mfspr r3,SPRN_HID4
std r3,CS_HID4(r5)
mfspr r3,SPRN_HID5
std r3,CS_HID5(r5)
[PATCH] powerpc: Move various ppc64 files with no ppc32 equivalent to powerpc This patch moves a bunch of files from arch/ppc64 and include/asm-ppc64 which have no equivalents in ppc32 code into arch/powerpc and include/asm-powerpc. The file affected are: abs_addr.h compat.h lppaca.h paca.h tce.h cpu_setup_power4.S ioctl32.c firmware.c pacaData.c The only changes apart from the move and corresponding Makefile changes are: - #ifndef/#define in includes updated to _ASM_POWERPC_ form - trailing whitespace removed - comments giving full paths removed - pacaData.c renamed paca.c to remove studlyCaps - Misplaced { moved in lppaca.h Built and booted on POWER5 LPAR (ARCH=powerpc and ARCH=ppc64), built for 32-bit powermac (ARCH=powerpc). Signed-off-by: David Gibson <david@gibson.dropbear.id.au> Signed-off-by: Paul Mackerras <paulus@samba.org>
2005-11-08 19:38:01 -07:00
Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
2005-04-16 15:20:36 -07:00
blr
/* Called with no MMU context (typically MSR:IR/DR off) to
* restore CPU state as backed up by the previous
* function. This does not include cache setting
*/
[POWERPC] Cleanup CPU inits Cleanup CPU inits a bit more, Geoff Levand already did some earlier. * Move CPU state save to cpu_setup, since cpu_setup is only ever done on cpu 0 on 64-bit and save is never done more than once. * Rename __restore_cpu_setup to __restore_cpu_ppc970 and add function pointers to the cputable to use instead. Powermac always has 970 so no need to check there. * Rename __970_cpu_preinit to __cpu_preinit_ppc970 and check PVR before calling it instead of in it, it's too early to use cputable. * Rename pSeries_secondary_smp_init to generic_secondary_smp_init since everyone but powermac and iSeries use it. Signed-off-by: Olof Johansson <olof@lixom.net> Signed-off-by: Paul Mackerras <paulus@samba.org>
2006-08-10 22:07:08 -07:00
_GLOBAL(__restore_cpu_ppc970)
/* Do nothing if not running in HV mode */
[POWERPC] Don't access HID registers if running on a Hypervisor. The following patch avoids accessing Hypervisor privilege HID registers when running on a Hypervisor (MSR[HV]=0). Signed-off-by: Jimi Xenidis <jimix@watson.ibm.com> Signed-off-by: Paul Mackerras <paulus@samba.org>
2006-06-21 16:15:55 -07:00
mfmsr r0
rldicl. r0,r0,4,63
beqlr
powerpc: Use LOAD_REG_IMMEDIATE only for constants on 64-bit Using LOAD_REG_IMMEDIATE to get the address of kernel symbols generates 5 instructions where LOAD_REG_ADDR can do it in one, and will generate R_PPC64_ADDR16_* relocations in the output when we get to making the kernel as a position-independent executable, which we'd rather not have to handle. This changes various bits of assembly code to use LOAD_REG_ADDR when we need to get the address of a symbol, or to use suitable position-independent code for cases where we can't access the TOC for various reasons, or if we're not running at the address we were linked at. It also cleans up a few minor things; there's no reason to save and restore SRR0/1 around RTAS calls, __mmu_off can get the return address from LR more conveniently than the caller can supply it in R4 (and we already assume elsewhere that EA == RA if the MMU is on in early boot), and enable_64b_mode was using 5 instructions where 2 would do. Signed-off-by: Paul Mackerras <paulus@samba.org>
2008-08-29 18:41:12 -07:00
LOAD_REG_ADDR(r5,cpu_state_storage)
[POWERPC] Don't access HID registers if running on a Hypervisor. The following patch avoids accessing Hypervisor privilege HID registers when running on a Hypervisor (MSR[HV]=0). Signed-off-by: Jimi Xenidis <jimix@watson.ibm.com> Signed-off-by: Paul Mackerras <paulus@samba.org>
2006-06-21 16:15:55 -07:00
/* Before accessing memory, we make sure rm_ci is clear */
Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
2005-04-16 15:20:36 -07:00
li r0,0
mfspr r3,SPRN_HID4
rldimi r3,r0,40,23 /* clear bit 23 (rm_ci) */
sync
mtspr SPRN_HID4,r3
isync
sync
/* Clear interrupt prefix */
li r0,0
sync
mtspr SPRN_HIOR,0
isync
/* Restore HID0 */
ld r3,CS_HID0(r5)
sync
isync
mtspr SPRN_HID0,r3
mfspr r3,SPRN_HID0
mfspr r3,SPRN_HID0
mfspr r3,SPRN_HID0
mfspr r3,SPRN_HID0
mfspr r3,SPRN_HID0
mfspr r3,SPRN_HID0
sync
isync
/* Restore HID1 */
ld r3,CS_HID1(r5)
sync
isync
mtspr SPRN_HID1,r3
mtspr SPRN_HID1,r3
sync
isync
[PATCH] powerpc: Move various ppc64 files with no ppc32 equivalent to powerpc This patch moves a bunch of files from arch/ppc64 and include/asm-ppc64 which have no equivalents in ppc32 code into arch/powerpc and include/asm-powerpc. The file affected are: abs_addr.h compat.h lppaca.h paca.h tce.h cpu_setup_power4.S ioctl32.c firmware.c pacaData.c The only changes apart from the move and corresponding Makefile changes are: - #ifndef/#define in includes updated to _ASM_POWERPC_ form - trailing whitespace removed - comments giving full paths removed - pacaData.c renamed paca.c to remove studlyCaps - Misplaced { moved in lppaca.h Built and booted on POWER5 LPAR (ARCH=powerpc and ARCH=ppc64), built for 32-bit powermac (ARCH=powerpc). Signed-off-by: David Gibson <david@gibson.dropbear.id.au> Signed-off-by: Paul Mackerras <paulus@samba.org>
2005-11-08 19:38:01 -07:00
Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
2005-04-16 15:20:36 -07:00
/* Restore HID4 */
ld r3,CS_HID4(r5)
sync
isync
mtspr SPRN_HID4,r3
sync
isync
/* Restore HID5 */
ld r3,CS_HID5(r5)
sync
isync
mtspr SPRN_HID5,r3
sync
isync
blr
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