From: arnd@arndb.de
To: paulus@samba.org
Cc: linuxppc-dev@ozlabs.org
Subject: [patch 2/9] autoselect optimal -mcpu= flag by platform
Date: Sat, 16 Jun 2007 02:05:13 +0200 [thread overview]
Message-ID: <20070616000618.314570319@arndb.de> (raw)
In-Reply-To: 20070616000511.712667424@arndb.de
We can choose the -mcpu= gcc flags for compiling the kernel
based on the platform that we build for. In case of multiplatform
kernels, this chooses a setting for a common subset.
When using a platform type that can use different CPUs, a
new option CONFIG_PPC_CPU_SELECTION can be enabled to select
more specifically which CPUs the kernel will be able to
run on.
This replaces the CONFIG_POWER4_ONLY option with an much more
generic approach.
Also, when CONFIG_PPC_CPU_SELECTION is set, it is now possible
to select a CPU to tune for by means of the -mtune= option.
I tried to be very careful when coding the specific rules into
the Kconfig language, but it would be good to have a few
people sanity-checking them.
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Index: linux-2.6/arch/powerpc/platforms/4xx/Kconfig
===================================================================
--- linux-2.6.orig/arch/powerpc/platforms/4xx/Kconfig
+++ linux-2.6/arch/powerpc/platforms/4xx/Kconfig
@@ -87,6 +87,7 @@ endmenu
# 40x specific CPU modules, selected based on the board above.
config NP405H
bool
+ select CPU_405
#depends on ASH
# OAK doesn't exist but wanted to keep this around for any future 403GCX boards
@@ -94,6 +95,7 @@ config 403GCX
bool
#depends on OAK
select IBM405_ERR51
+ select CPU_403
config 405GP
bool
@@ -102,19 +104,23 @@ config 405GP
config 405EP
bool
+ select CPU_405
config 405GPR
bool
+ select CPU_405
config VIRTEX_II_PRO
bool
select IBM405_ERR77
select IBM405_ERR51
+ select CPU_405
config STB03xxx
bool
select IBM405_ERR77
select IBM405_ERR51
+ select CPU_405
# 40x errata/workaround config symbols, selected by the CPU models above
@@ -168,20 +174,25 @@ config 440EP
bool
select PPC_FPU
select IBM440EP_ERR42
+ select CPU_440
config 440GP
bool
select IBM_NEW_EMAC_ZMII
+ select CPU_440
config 440GX
bool
+ select CPU_440
config 440SP
bool
+ select CPU_440
config 440A
bool
depends on 440GX
+ select CPU_440
default y
# 44x errata/workaround config symbols, selected by the CPU models above
Index: linux-2.6/arch/powerpc/platforms/52xx/Kconfig
===================================================================
--- linux-2.6.orig/arch/powerpc/platforms/52xx/Kconfig
+++ linux-2.6/arch/powerpc/platforms/52xx/Kconfig
@@ -25,12 +25,14 @@ config PPC_EFIKA
select RTAS_PROC
select PPC_MPC52xx
select PPC_NATIVE
+ select CPU_603e
default n
config PPC_LITE5200
bool "Freescale Lite5200 Eval Board"
depends on PPC_MULTIPLATFORM && PPC32
select PPC_MPC5200
+ select CPU_603e
default n
Index: linux-2.6/arch/powerpc/platforms/82xx/Kconfig
===================================================================
--- linux-2.6.orig/arch/powerpc/platforms/82xx/Kconfig
+++ linux-2.6/arch/powerpc/platforms/82xx/Kconfig
@@ -10,6 +10,7 @@ config MPC82xx_ADS
select 8272
select 8260
select FSL_SOC
+ select CPU_603e
help
This option enables support for the MPC8272 ADS board
Index: linux-2.6/arch/powerpc/platforms/83xx/Kconfig
===================================================================
--- linux-2.6.orig/arch/powerpc/platforms/83xx/Kconfig
+++ linux-2.6/arch/powerpc/platforms/83xx/Kconfig
@@ -6,6 +6,7 @@ choice
config MPC8313_RDB
bool "Freescale MPC8313 RDB"
select DEFAULT_UIMAGE
+ select CPU_603e
help
This option enables support for the MPC8313 RDB board.
@@ -13,6 +14,7 @@ config MPC832x_MDS
bool "Freescale MPC832x MDS"
select DEFAULT_UIMAGE
select QUICC_ENGINE
+ select CPU_603e
help
This option enables support for the MPC832x MDS evaluation board.
@@ -20,12 +22,14 @@ config MPC832x_RDB
bool "Freescale MPC832x RDB"
select DEFAULT_UIMAGE
select QUICC_ENGINE
+ select CPU_603e
help
This option enables support for the MPC8323 RDB board.
config MPC834x_MDS
bool "Freescale MPC834x MDS"
select DEFAULT_UIMAGE
+ select CPU_603e
help
This option enables support for the MPC 834x MDS evaluation board.
@@ -37,6 +41,7 @@ config MPC834x_MDS
config MPC834x_ITX
bool "Freescale MPC834x ITX"
select DEFAULT_UIMAGE
+ select CPU_603e
help
This option enables support for the MPC 834x ITX evaluation board.
@@ -47,6 +52,7 @@ config MPC836x_MDS
bool "Freescale MPC836x MDS"
select DEFAULT_UIMAGE
select QUICC_ENGINE
+ select CPU_603e
help
This option enables support for the MPC836x MDS Processor Board.
Index: linux-2.6/arch/powerpc/platforms/86xx/Kconfig
===================================================================
--- linux-2.6.orig/arch/powerpc/platforms/86xx/Kconfig
+++ linux-2.6/arch/powerpc/platforms/86xx/Kconfig
@@ -7,6 +7,7 @@ config MPC8641_HPCN
bool "Freescale MPC8641 HPCN"
select PPC_I8259
select DEFAULT_UIMAGE
+ select CPU_74xx
help
This option enables support for the MPC8641 HPCN board.
Index: linux-2.6/arch/powerpc/platforms/Kconfig.cputype
===================================================================
--- linux-2.6.orig/arch/powerpc/platforms/Kconfig.cputype
+++ linux-2.6/arch/powerpc/platforms/Kconfig.cputype
@@ -51,9 +51,232 @@ config E200
endchoice
-config POWER4_ONLY
- bool "Optimize for POWER4"
+config PPC_CPU_SELECTION
+ bool "Advanced CPU selection"
+
+config CPU_DEFAULT
+ bool "Don't specify -mcpu= to gcc" if PPC_CPU_SELECTION
+
+config CPU_RS64
+ bool "RS64" if PPC_CPU_SELECTION
+ depends on PPC64
+ default y if PPC_PSERIES || PPC_ISERIES
+
+config CPU_POWER3
+ bool "IBM Power3" if PPC_CPU_SELECTION
+ depends on PPC64
+ default y if PPC_PSERIES || PPC_ISERIES
+
+config CPU_POWER4
+ bool "IBM Power4" if PPC_CPU_SELECTION
+ depends on PPC64
+ default y if PPC_PSERIES || PPC_ISERIES
+
+config CPU_POWER5
+ bool "IBM Power5" if PPC_CPU_SELECTION
+ depends on PPC64
+ default y if PPC_PSERIES
+
+config CPU_POWER6
+ bool "IBM Power6" if PPC_CPU_SELECTION
+ depends on PPC64
+ default y if PPC_PSERIES
+ select ALTIVEC
+
+config CPU_970
+ bool "IBM PowerPC 970 (G5)" if PPC_CPU_SELECTION
+ depends on PPC64
+ default y if PPC_PSERIES
+ select ALTIVEC
+
+config CPU_CELL
+ bool "Sony/Toshiba/IBM Cell Broadband Engine" if PPC_CPU_SELECTION
depends on PPC64
+ select ALTIVEC
+
+config CPU_PA6T
+ bool "PA Semi PA6T-1682M" if PPC_CPU_SELECTION
+ depends on PPC64
+ select ALTIVEC
+
+config CPU_601
+ bool "PowerPC 601 (G1)" if PPC_CPU_SELECTION
+ depends on 6xx
+ default y if PPC_CHRP || PPC_PREP
+
+config CPU_603e
+ bool "PowerPC 603e, 604, 604e, 52xx, 82xx, 83xx (G2)" if PPC_CPU_SELECTION
+ depends on 6xx
+ default y if PPC_CHRP || PPC_PREP || PPC_PMAC
+
+config CPU_7xx
+ bool "PowerPC 740/750 (G3)" if PPC_CPU_SELECTION
+ depends on 6xx
+ default y if PPC_PMAC
+
+config CPU_74xx
+ bool "PowerPC 74xx, 86xx (G4)" if PPC_CPU_SELECTION
+ depends on 6xx
+ default y if PPC_PMAC
+ select ALTIVEC
+
+config CPU_403
+ bool "AMCC 403" if PPC_CPU_SELECTION
+ depends on 40x
+
+config CPU_405
+ bool "AMCC 405" if PPC_CPU_SELECTION
+ depends on 40x
+
+config CPU_440
+ bool "AMCC 440" if PPC_CPU_SELECTION
+ depends on 44x
+
+choice
+ prompt "Tune for processor type" if PPC_CPU_SELECTION
+ default TUNE_POWER4 if PPC64
+ default TUNE_DEFAULT
+
+config TUNE_DEFAULT
+ bool "Don't specify -mtune= to gcc"
+
+config TUNE_RS64
+ bool "RS64"
+ depends on CPU_RS64
+
+config TUNE_POWER3
+ bool "IBM Power3"
+ depends on CPU_POWER3
+
+config TUNE_POWER4
+ bool "IBM Power4"
+ depends on CPU_POWER4
+
+config TUNE_POWER5
+ bool "IBM Power5"
+ depends on CPU_POWER5
+
+config TUNE_POWER6
+ bool "IBM Power6"
+ depends on CPU_POWER6
+
+config TUNE_970
+ bool "IBM PowerPC 970 (G5)"
+ depends on CPU_970
+
+config TUNE_CELL
+ bool "Sony/Toshiba/IBM Cell Broadband Engine"
+ depends on CPU_CELL
+
+config TUNE_PA6T
+ bool "PA Semi PA6T-1682M"
+ depends on CPU_PA6T
+
+config TUNE_601
+ bool "PowerPC 601 (G1)"
+ depends on CPU_601
+
+config TUNE_603e
+ bool "PowerPC 603e, 604, 604e, 52xx, 82xx, 83xx (G2)"
+ depends on CPU_603e
+
+config TUNE_7xx
+ bool "PowerPC 740/750 (G3)"
+ depends on CPU_7xx
+
+config TUNE_74xx
+ bool "PowerPC 74xx, 86xx (G4)"
+ depends on CPU_74xx
+
+config TUNE_821
+ bool "Freescale MPC821"
+ depends on 8xx
+
+config TUNE_823
+ bool "Freescale MPC823"
+ depends on 8xx
+
+config TUNE_860
+ bool "Freescale MPC860"
+ depends on 8xx
+
+config TUNE_403
+ bool "AMCC 403"
+ depends on CPU_403
+
+config TUNE_405
+ bool "AMCC 405"
+ depends on CPU_405
+
+config TUNE_440
+ bool "AMCC 440"
+ depends on CPU_440
+
+config TUNE_8540
+ bool "Freescale MPC8540"
+ depends on PPC_85xx
+
+config TUNE_E200
+ bool "Freescale e200"
+ depends on E200
+
+endchoice
+
+config PPC_MCPU
+ string
+ default "" if CPU_DEFAULT
+ default "-mcpu=powerpc64" if CPU_POWER3 || CPU_RS64
+ default "-mcpu=power4" if (CPU_POWER5 || CPU_POWER6) && (CPU_970 || CPU_CELL || CPU_PA6T)
+ default "-mcpu=power4" if CPU_POWER4
+ default "-mcpu=power5" if CPU_POWER5
+ default "-mcpu=power6" if CPU_POWER6
+ default "-mcpu=970" if CPU_970
+ default "-mcpu=cell" if CPU_CELL
+ default "-mcpu=pa6t" if CPU_PA6T
+ default "-mcpu=powerpc64" if PPC64
+ default "-mcpu=powerpc" if CPU_601 && (CPU_603e || CPU_7xx || CPU_74xx)
+ default "-mcpu=601" if CPU_601
+ default "-mcpu=603e" if CPU_603e
+ default "-mcpu=750" if CPU_7xx
+ default "-mcpu=7450" if CPU_74xx
+ default "-mcpu=powerpc" if (CPU_403 && CPU_405)
+ default "-mcpu=powerpc" if (CPU_403 || CPU_405) && CPU_440
+ default "-mcpu=403" if CPU_403
+ default "-mcpu=405" if CPU_405
+ default "-mcpu=440" if CPU_440
+ default "-mcpu=860" if PPC_8xx
+ default "-mcpu=8540" if PPC_85xx
+ default "-mcpu=e200" if E200
+ default "-mcpu=powerpc"
+
+config PPC_MTUNE
+ string
+ default "" if TUNE_DEFAULT
+ default "-mtune=power3" if TUNE_POWER3
+ default "-mtune=rs64a" if TUNE_RS64
+ default "-mtune=power4" if TUNE_POWER4
+ default "-mtune=power5" if TUNE_POWER5
+ default "-mtune=power6" if TUNE_POWER6
+ default "-mtune=970" if TUNE_970
+ default "-mtune=cell" if TUNE_CELL
+ default "-mtune=pa6t" if TUNE_PA6T
+ default "-mtune=601" if TUNE_601
+ default "-mtune=603e" if TUNE_603e
+ default "-mtune=750" if TUNE_7xx
+ default "-mtune=7450" if TUNE_74xx
+ default "-mtune=403" if TUNE_403
+ default "-mtune=405" if TUNE_405
+ default "-mtune=440" if TUNE_440
+ default "-mtune=821" if TUNE_821
+ default "-mtune=823" if TUNE_823
+ default "-mtune=860" if TUNE_860
+ default "-mtune=8540" if TUNE_8540
+ default "-mtune=e200" if TUNE_E200
+ default "-mtune=power4" if PPC64
+
+config POWER4_ONLY
+ def_bool y
+ depends on PPC64 && !CPU_POWER3 && !CPU_RS64
default n
---help---
Cause the compiler to optimize for POWER4/POWER5/PPC970 processors.
Index: linux-2.6/arch/powerpc/platforms/cell/Kconfig
===================================================================
--- linux-2.6.orig/arch/powerpc/platforms/cell/Kconfig
+++ linux-2.6/arch/powerpc/platforms/cell/Kconfig
@@ -20,6 +20,7 @@ config PPC_IBM_CELL_BLADE
select MMIO_NVRAM
select PPC_UDBG_16550
select UDBG_RTAS_CONSOLE
+ select CPU_CELL
menu "Cell Broadband Engine options"
depends on PPC_CELL
Index: linux-2.6/arch/powerpc/platforms/celleb/Kconfig
===================================================================
--- linux-2.6.orig/arch/powerpc/platforms/celleb/Kconfig
+++ linux-2.6/arch/powerpc/platforms/celleb/Kconfig
@@ -2,6 +2,7 @@ config PPC_CELLEB
bool "Toshiba's Cell Reference Set 'Celleb' Architecture"
depends on PPC_MULTIPLATFORM && PPC64
select PPC_CELL
+ select CPU_CELL
select PPC_OF_PLATFORM_PCI
select HAS_TXX9_SERIAL
select PPC_UDBG_BEAT
Index: linux-2.6/arch/powerpc/platforms/embedded6xx/Kconfig
===================================================================
--- linux-2.6.orig/arch/powerpc/platforms/embedded6xx/Kconfig
+++ linux-2.6/arch/powerpc/platforms/embedded6xx/Kconfig
@@ -8,6 +8,7 @@ config LINKSTATION
select FSL_SOC
select PPC_UDBG_16550 if SERIAL_8250
select DEFAULT_UIMAGE
+ select CPU_603e
help
Select LINKSTATION if configuring for one of PPC- (MPC8241)
based NAS systems from Buffalo Technology. So far only
@@ -20,6 +21,7 @@ config MPC7448HPC2
select TSI108_BRIDGE
select DEFAULT_UIMAGE
select PPC_UDBG_16550
+ select CPU_74xx
help
Select MPC7448HPC2 if configuring for Freescale MPC7448HPC2 (Taiga)
platform
@@ -28,6 +30,7 @@ config PPC_HOLLY
bool "PPC750GX/CL with TSI10x bridge (Hickory/Holly)"
select TSI108_BRIDGE
select PPC_UDBG_16550
+ select CPU_7xx
help
Select PPC_HOLLY if configuring for an IBM 750GX/CL Eval
Board with TSI108/9 bridge (Hickory/Holly)
@@ -37,6 +40,7 @@ config PPC_PRPMC2800
select MV64X60
select NOT_COHERENT_CACHE
select WANT_DEVICE_TREE
+ select CPU_74xx
help
This option enables support for the Motorola PrPMC2800 board
endchoice
Index: linux-2.6/arch/powerpc/platforms/maple/Kconfig
===================================================================
--- linux-2.6.orig/arch/powerpc/platforms/maple/Kconfig
+++ linux-2.6/arch/powerpc/platforms/maple/Kconfig
@@ -11,6 +11,7 @@ config PPC_MAPLE
select PPC_RTAS
select MMIO_NVRAM
select ATA_NONSTANDARD if ATA
+ select CPU_970
default n
help
This option enables support for the Maple 970FX Evaluation Board.
Index: linux-2.6/arch/powerpc/platforms/pasemi/Kconfig
===================================================================
--- linux-2.6.orig/arch/powerpc/platforms/pasemi/Kconfig
+++ linux-2.6/arch/powerpc/platforms/pasemi/Kconfig
@@ -5,6 +5,7 @@ config PPC_PASEMI
select MPIC
select PPC_UDBG_16550
select PPC_NATIVE
+ select CPU_PA6T
help
This option enables support for PA Semi's PWRficient line
of SoC processors, including PA6T-1682M
Index: linux-2.6/arch/powerpc/platforms/powermac/Kconfig
===================================================================
--- linux-2.6.orig/arch/powerpc/platforms/powermac/Kconfig
+++ linux-2.6/arch/powerpc/platforms/powermac/Kconfig
@@ -15,6 +15,7 @@ config PPC_PMAC64
select MPIC_U3_HT_IRQS
select GENERIC_TBSYNC
select PPC_970_NAP
+ select CPU_970
default y
Index: linux-2.6/arch/powerpc/platforms/ps3/Kconfig
===================================================================
--- linux-2.6.orig/arch/powerpc/platforms/ps3/Kconfig
+++ linux-2.6/arch/powerpc/platforms/ps3/Kconfig
@@ -2,6 +2,7 @@ config PPC_PS3
bool "Sony PS3 (incomplete)"
depends on PPC_MULTIPLATFORM && PPC64
select PPC_CELL
+ select CPU_CELL
select USB_ARCH_HAS_OHCI
select USB_OHCI_LITTLE_ENDIAN
select USB_OHCI_BIG_ENDIAN_MMIO
Index: linux-2.6/arch/powerpc/Makefile
===================================================================
--- linux-2.6.orig/arch/powerpc/Makefile
+++ linux-2.6/arch/powerpc/Makefile
@@ -78,24 +78,23 @@ LINUXINCLUDE += $(LINUXINCLUDE-y)
CHECKFLAGS += -m$(SZ) -D__powerpc__ -D__powerpc$(SZ)__
+OPTFLAGS := $(call cc-option,$(CONFIG_PPC_MCPU)) $(call cc-option,$(CONFIG_PPC_MTUNE))
+
+# compilers older than 4.0.0 can only set -maltivec in 64 bit mode
+# when compiling for 970
ifeq ($(CONFIG_PPC64),y)
GCC_BROKEN_VEC := $(shell if [ $(call cc-version) -lt 0400 ] ; then echo "y"; fi)
-
ifeq ($(CONFIG_POWER4_ONLY),y)
ifeq ($(CONFIG_ALTIVEC),y)
ifeq ($(GCC_BROKEN_VEC),y)
- CFLAGS += $(call cc-option,-mcpu=970)
-else
- CFLAGS += $(call cc-option,-mcpu=power4)
+ OPTFLAGS := $(call cc-option,-mcpu=970) $(call cc-option,$(CONFIG_PPC_MTUNE))
endif
-else
- CFLAGS += $(call cc-option,-mcpu=power4)
endif
-else
- CFLAGS += $(call cc-option,-mtune=power4)
endif
endif
+CFLAGS += $(OPTFLAGS)
+
# No AltiVec instruction when building kernel
CFLAGS += $(call cc-option,-mno-altivec)
@@ -107,10 +106,6 @@ CFLAGS += $(call cc-option,-funit-at-a-t
# often slow when they are implemented at all
CFLAGS += -mno-string
-ifeq ($(CONFIG_6xx),y)
-CFLAGS += -mcpu=powerpc
-endif
-
cpu-as-$(CONFIG_4xx) += -Wa,-m405
cpu-as-$(CONFIG_6xx) += -Wa,-maltivec
cpu-as-$(CONFIG_POWER4) += -Wa,-maltivec
--
next prev parent reply other threads:[~2007-06-16 0:09 UTC|newest]
Thread overview: 25+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <20070616000511.712667424@arndb.de>
2007-06-16 0:05 ` [patch 1/9] move 82xx/83xx/86xx Kconfig options to platform selection arnd
2007-06-17 14:42 ` Kumar Gala
2007-07-11 15:35 ` Mark A. Greer
2007-07-11 20:33 ` Arnd Bergmann
2007-07-11 21:19 ` Segher Boessenkool
2007-07-11 23:47 ` Mark A. Greer
2007-06-16 0:05 ` arnd [this message]
2007-06-17 14:29 ` [patch 2/9] autoselect optimal -mcpu= flag by platform Kumar Gala
2007-06-17 16:11 ` Segher Boessenkool
2007-06-17 17:20 ` Arnd Bergmann
2007-06-17 17:46 ` Segher Boessenkool
2007-06-29 5:58 ` Paul Mackerras
2007-06-16 0:05 ` [patch 3/9] rename add_bridge to avoid namespace clashes arnd
2007-06-16 0:05 ` [patch 4/9] mpc82xx_ads build fix arnd
2007-06-16 7:37 ` Stephen Rothwell
2007-06-16 9:33 ` [updated PATCH] " Arnd Bergmann
2007-06-16 0:05 ` [patch 5/9] kill isa_{io,mem}_base definitions for !PCI arnd
2007-06-17 14:33 ` Kumar Gala
2007-06-17 15:32 ` Arnd Bergmann
2007-06-16 0:05 ` [patch 6/9] fix building without PCI arnd
2007-06-16 0:05 ` [patch 7/9] disallow building powermac and tsi108 " arnd
2007-06-17 14:35 ` Kumar Gala
2007-06-17 15:32 ` Arnd Bergmann
2007-06-16 0:05 ` [patch 8/9] fix conflicting mpc85xx board headers arnd
2007-06-16 0:05 ` [patch 9/9] enable multiplatform support for embedded boards arnd
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