[PATCH 0/6] CPU selection Kconfig cleanup

[PATCH 0/6] CPU selection Kconfig cleanup

[Arnd Bergmann]

This is a new attempt at improving the CPU selection menu in
arch/powerpc/Kconfig, based on the comments for an older
patch in the same general direction.

Please review.

	Arnd <><

--

[PATCH 1/6] powerpc: split out CPU specific options into a new Kconfig file

[Arnd Bergmann]

A lot of the options in arch/powerpc/Kconfig deal with the CPU menu,
and my next patches add more to them. Moving them to a new
arch/powerpc/platforms/Kconfig.cputype file makes it easier to
follow.

There are no functional changes in here.

Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Index: linux-2.6/arch/powerpc/Kconfig
===================================================================
--- linux-2.6.orig/arch/powerpc/Kconfig
+++ linux-2.6/arch/powerpc/Kconfig
@@ -4,12 +4,7 @@
 
 mainmenu "Linux/PowerPC Kernel Configuration"
 
-config PPC64
-	bool "64-bit kernel"
-	default n
-	help
-	  This option selects whether a 32-bit or a 64-bit kernel
-	  will be built.
+source "arch/powerpc/platforms/Kconfig.cputype"
 
 config PPC_PM_NEEDS_RTC_LIB
 	bool
@@ -123,122 +118,6 @@ config DEFAULT_UIMAGE
 	  Used to allow a board to specify it wants a uImage built by default
 	default n
 
-menu "Processor support"
-choice
-	prompt "Processor Type"
-	depends on PPC32
-	default 6xx
-
-config CLASSIC32
-	bool "52xx/6xx/7xx/74xx"
-	select PPC_FPU
-	select 6xx
-	help
-	  There are four families of PowerPC chips supported.  The more common
-	  types (601, 603, 604, 740, 750, 7400), the Motorola embedded
-	  versions (821, 823, 850, 855, 860, 52xx, 82xx, 83xx), the AMCC
-	  embedded versions (403 and 405) and the high end 64 bit Power
-	  processors (POWER 3, POWER4, and IBM PPC970 also known as G5).
-
-	  This option is the catch-all for 6xx types, including some of the
-	  embedded versions.  Unless there is see an option for the specific
-	  chip family you are using, you want this option.
-	  
-	  You do not want this if you are building a kernel for a 64 bit
-	  IBM RS/6000 or an Apple G5, choose 6xx.
-	  
-	  If unsure, select this option
-	  
-	  Note that the kernel runs in 32-bit mode even on 64-bit chips.
-
-config PPC_82xx
-	bool "Freescale 82xx"
-	select 6xx
-	select PPC_FPU
-
-config PPC_83xx
-	bool "Freescale 83xx"
-	select 6xx
-	select FSL_SOC
-	select 83xx
-	select PPC_FPU
-	select WANT_DEVICE_TREE
-
-config PPC_85xx
-	bool "Freescale 85xx"
-	select E500
-	select FSL_SOC
-	select 85xx
-	select WANT_DEVICE_TREE
-
-config PPC_86xx
-	bool "Freescale 86xx"
-	select 6xx
-	select FSL_SOC
-	select FSL_PCIE
-	select PPC_FPU
-	select ALTIVEC
-	help
-	  The Freescale E600 SoCs have 74xx cores.
-
-config PPC_8xx
-	bool "Freescale 8xx"
-	select FSL_SOC
-	select 8xx
-
-config 40x
-	bool "AMCC 40x"
-	select PPC_DCR_NATIVE
-
-config 44x
-	bool "AMCC 44x"
-	select PPC_DCR_NATIVE
-
-config E200
-	bool "Freescale e200"
-
-endchoice
-
-config POWER4_ONLY
-	bool "Optimize for POWER4"
-	depends on PPC64
-	default n
-	---help---
-	  Cause the compiler to optimize for POWER4/POWER5/PPC970 processors.
-	  The resulting binary will not work on POWER3 or RS64 processors
-	  when compiled with binutils 2.15 or later.
-
-config POWER3
-	bool
-	depends on PPC64
-	default y if !POWER4_ONLY
-
-config POWER4
-	depends on PPC64
-	def_bool y
-
-config 6xx
-	bool
-
-# this is temp to handle compat with arch=ppc
-config 8xx
-	bool
-
-# this is temp to handle compat with arch=ppc
-config 83xx
-	bool
-
-# this is temp to handle compat with arch=ppc
-config 85xx
-	bool
-
-config E500
-	bool
-
-config PPC_FPU
-	bool
-	default y if PPC64
-
 config PPC_DCR_NATIVE
 	bool
 	default n
@@ -257,121 +136,6 @@ config PPC_OF_PLATFORM_PCI
 	depends on PPC64 # not supported on 32 bits yet
 	default n
 
-config BOOKE
-	bool
-	depends on E200 || E500
-	default y
-
-config FSL_BOOKE
-	bool
-	depends on E200 || E500
-	default y
-
-config PTE_64BIT
-	bool
-	depends on 44x || E500
-	default y if 44x
-	default y if E500 && PHYS_64BIT
-
-config PHYS_64BIT
-	bool 'Large physical address support' if E500
-	depends on 44x || E500
-	select RESOURCES_64BIT
-	default y if 44x
-	---help---
-	  This option enables kernel support for larger than 32-bit physical
-	  addresses.  This features is not be available on all e500 cores.
-
-	  If in doubt, say N here.
-
-config ALTIVEC
-	bool "AltiVec Support"
-	depends on CLASSIC32 || POWER4
-	---help---
-	  This option enables kernel support for the Altivec extensions to the
-	  PowerPC processor. The kernel currently supports saving and restoring
-	  altivec registers, and turning on the 'altivec enable' bit so user
-	  processes can execute altivec instructions.
-
-	  This option is only usefully if you have a processor that supports
-	  altivec (G4, otherwise known as 74xx series), but does not have
-	  any affect on a non-altivec cpu (it does, however add code to the
-	  kernel).
-
-	  If in doubt, say Y here.
-
-config SPE
-	bool "SPE Support"
-	depends on E200 || E500
-	default y
-	---help---
-	  This option enables kernel support for the Signal Processing
-	  Extensions (SPE) to the PowerPC processor. The kernel currently
-	  supports saving and restoring SPE registers, and turning on the
-	  'spe enable' bit so user processes can execute SPE instructions.
-
-	  This option is only useful if you have a processor that supports
-	  SPE (e500, otherwise known as 85xx series), but does not have any
-	  effect on a non-spe cpu (it does, however add code to the kernel).
-
-	  If in doubt, say Y here.
-
-config PPC_STD_MMU
-	bool
-	depends on 6xx || POWER3 || POWER4 || PPC64
-	default y
-
-config PPC_STD_MMU_32
-	def_bool y
-	depends on PPC_STD_MMU && PPC32
-
-config VIRT_CPU_ACCOUNTING
-	bool "Deterministic task and CPU time accounting"
-	depends on PPC64
-	default y
-	help
-	  Select this option to enable more accurate task and CPU time
-	  accounting.  This is done by reading a CPU counter on each
-	  kernel entry and exit and on transitions within the kernel
-	  between system, softirq and hardirq state, so there is a
-	  small performance impact.  This also enables accounting of
-	  stolen time on logically-partitioned systems running on
-	  IBM POWER5-based machines.
-
-	  If in doubt, say Y here.
-
-config SMP
-	depends on PPC_STD_MMU
-	bool "Symmetric multi-processing support"
-	---help---
-	  This enables support for systems with more than one CPU. If you have
-	  a system with only one CPU, say N. If you have a system with more
-	  than one CPU, say Y.  Note that the kernel does not currently
-	  support SMP machines with 603/603e/603ev or PPC750 ("G3") processors
-	  since they have inadequate hardware support for multiprocessor
-	  operation.
-
-	  If you say N here, the kernel will run on single and multiprocessor
-	  machines, but will use only one CPU of a multiprocessor machine. If
-	  you say Y here, the kernel will run on single-processor machines.
-	  On a single-processor machine, the kernel will run faster if you say
-	  N here.
-
-	  If you don't know what to do here, say N.
-
-config NR_CPUS
-	int "Maximum number of CPUs (2-128)"
-	range 2 128
-	depends on SMP
-	default "32" if PPC64
-	default "4"
-
-config NOT_COHERENT_CACHE
-	bool
-	depends on 4xx || 8xx || E200
-	default y
-endmenu
-
 source "init/Kconfig"
 
 source "arch/powerpc/platforms/Kconfig"
Index: linux-2.6/arch/powerpc/platforms/Kconfig.cputype
===================================================================
--- /dev/null
+++ linux-2.6/arch/powerpc/platforms/Kconfig.cputype
@@ -0,0 +1,238 @@
+config PPC64
+	bool "64-bit kernel"
+	default n
+	help
+	  This option selects whether a 32-bit or a 64-bit kernel
+	  will be built.
+
+menu "Processor support"
+choice
+	prompt "Processor Type"
+	depends on PPC32
+	default 6xx
+
+config CLASSIC32
+	bool "52xx/6xx/7xx/74xx"
+	select PPC_FPU
+	select 6xx
+	help
+	  There are four families of PowerPC chips supported.  The more common
+	  types (601, 603, 604, 740, 750, 7400), the Motorola embedded
+	  versions (821, 823, 850, 855, 860, 52xx, 82xx, 83xx), the AMCC
+	  embedded versions (403 and 405) and the high end 64 bit Power
+	  processors (POWER 3, POWER4, and IBM PPC970 also known as G5).
+
+	  This option is the catch-all for 6xx types, including some of the
+	  embedded versions.  Unless there is see an option for the specific
+	  chip family you are using, you want this option.
+
+	  You do not want this if you are building a kernel for a 64 bit
+	  IBM RS/6000 or an Apple G5, choose 6xx.
+
+	  If unsure, select this option
+
+	  Note that the kernel runs in 32-bit mode even on 64-bit chips.
+
+config PPC_82xx
+	bool "Freescale 82xx"
+	select 6xx
+	select PPC_FPU
+
+config PPC_83xx
+	bool "Freescale 83xx"
+	select 6xx
+	select FSL_SOC
+	select 83xx
+	select PPC_FPU
+	select WANT_DEVICE_TREE
+
+config PPC_85xx
+	bool "Freescale 85xx"
+	select E500
+	select FSL_SOC
+	select 85xx
+	select WANT_DEVICE_TREE
+
+config PPC_86xx
+	bool "Freescale 86xx"
+	select 6xx
+	select FSL_SOC
+	select FSL_PCIE
+	select PPC_FPU
+	select ALTIVEC
+	help
+	  The Freescale E600 SoCs have 74xx cores.
+
+config PPC_8xx
+	bool "Freescale 8xx"
+	select FSL_SOC
+	select 8xx
+
+config 40x
+	bool "AMCC 40x"
+	select PPC_DCR_NATIVE
+
+config 44x
+	bool "AMCC 44x"
+	select PPC_DCR_NATIVE
+
+config E200
+	bool "Freescale e200"
+
+endchoice
+
+config POWER4_ONLY
+	bool "Optimize for POWER4"
+	depends on PPC64
+	default n
+	---help---
+	  Cause the compiler to optimize for POWER4/POWER5/PPC970 processors.
+	  The resulting binary will not work on POWER3 or RS64 processors
+	  when compiled with binutils 2.15 or later.
+
+config POWER3
+	bool
+	depends on PPC64
+	default y if !POWER4_ONLY
+
+config POWER4
+	depends on PPC64
+	def_bool y
+
+config 6xx
+	bool
+
+# this is temp to handle compat with arch=ppc
+config 8xx
+	bool
+
+# this is temp to handle compat with arch=ppc
+config 83xx
+	bool
+
+# this is temp to handle compat with arch=ppc
+config 85xx
+	bool
+
+config E500
+	bool
+
+config PPC_FPU
+	bool
+	default y if PPC64
+
+config BOOKE
+	bool
+	depends on E200 || E500
+	default y
+
+config FSL_BOOKE
+	bool
+	depends on E200 || E500
+	default y
+
+config PTE_64BIT
+	bool
+	depends on 44x || E500
+	default y if 44x
+	default y if E500 && PHYS_64BIT
+
+config PHYS_64BIT
+	bool 'Large physical address support' if E500
+	depends on 44x || E500
+	select RESOURCES_64BIT
+	default y if 44x
+	---help---
+	  This option enables kernel support for larger than 32-bit physical
+	  addresses.  This features is not be available on all e500 cores.
+
+	  If in doubt, say N here.
+
+config ALTIVEC
+	bool "AltiVec Support"
+	depends on CLASSIC32 || POWER4
+	---help---
+	  This option enables kernel support for the Altivec extensions to the
+	  PowerPC processor. The kernel currently supports saving and restoring
+	  altivec registers, and turning on the 'altivec enable' bit so user
+	  processes can execute altivec instructions.
+
+	  This option is only usefully if you have a processor that supports
+	  altivec (G4, otherwise known as 74xx series), but does not have
+	  any affect on a non-altivec cpu (it does, however add code to the
+	  kernel).
+
+	  If in doubt, say Y here.
+
+config SPE
+	bool "SPE Support"
+	depends on E200 || E500
+	default y
+	---help---
+	  This option enables kernel support for the Signal Processing
+	  Extensions (SPE) to the PowerPC processor. The kernel currently
+	  supports saving and restoring SPE registers, and turning on the
+	  'spe enable' bit so user processes can execute SPE instructions.
+
+	  This option is only useful if you have a processor that supports
+	  SPE (e500, otherwise known as 85xx series), but does not have any
+	  effect on a non-spe cpu (it does, however add code to the kernel).
+
+	  If in doubt, say Y here.
+
+config PPC_STD_MMU
+	bool
+	depends on 6xx || POWER3 || POWER4 || PPC64
+	default y
+
+config PPC_STD_MMU_32
+	def_bool y
+	depends on PPC_STD_MMU && PPC32
+
+config VIRT_CPU_ACCOUNTING
+	bool "Deterministic task and CPU time accounting"
+	depends on PPC64
+	default y
+	help
+	  Select this option to enable more accurate task and CPU time
+	  accounting.  This is done by reading a CPU counter on each
+	  kernel entry and exit and on transitions within the kernel
+	  between system, softirq and hardirq state, so there is a
+	  small performance impact.  This also enables accounting of
+	  stolen time on logically-partitioned systems running on
+	  IBM POWER5-based machines.
+
+	  If in doubt, say Y here.
+
+config SMP
+	depends on PPC_STD_MMU
+	bool "Symmetric multi-processing support"
+	---help---
+	  This enables support for systems with more than one CPU. If you have
+	  a system with only one CPU, say N. If you have a system with more
+	  than one CPU, say Y.  Note that the kernel does not currently
+	  support SMP machines with 603/603e/603ev or PPC750 ("G3") processors
+	  since they have inadequate hardware support for multiprocessor
+	  operation.
+
+	  If you say N here, the kernel will run on single and multiprocessor
+	  machines, but will use only one CPU of a multiprocessor machine. If
+	  you say Y here, the kernel will run on single-processor machines.
+	  On a single-processor machine, the kernel will run faster if you say
+	  N here.
+
+	  If you don't know what to do here, say N.
+
+config NR_CPUS
+	int "Maximum number of CPUs (2-128)"
+	range 2 128
+	depends on SMP
+	default "32" if PPC64
+	default "4"
+
+config NOT_COHERENT_CACHE
+	bool
+	depends on 4xx || 8xx || E200
+	default y
+endmenu
+

--

Re: [PATCH 1/6] powerpc: split out CPU specific options into a new Kconfig file

[Timur Tabi]

Arnd Bergmann wrote:

> +config CLASSIC32
> +	bool "52xx/6xx/7xx/74xx"
> +	select PPC_FPU
> +	select 6xx
> +	help
> +	  There are four families of PowerPC chips supported.  The more common
> +	  types (601, 603, 604, 740, 750, 7400), the Motorola embedded
> +	  versions (821, 823, 850, 855, 860, 52xx, 82xx, 83xx), the AMCC
> +	  embedded versions (403 and 405) and the high end 64 bit Power
> +	  processors (POWER 3, POWER4, and IBM PPC970 also known as G5).

Is this help text still accurate?  The bool line says "52xx/6xx/7xx/74xx", but you talk 
about many more processors in the help text.  You mention the 83xx, but not the 85xx or 
86xx, nor do you mention Freescale.  Not only that, but the help text implies that 8xx, 
52xx, 82xx, and 83xx are part of the same family, but the bool text implies that 52xx is 
part of a different family.

> +	  This option is the catch-all for 6xx types, including some of the
> +	  embedded versions.  Unless there is see an option for the specific
> +	  chip family you are using, you want this option.

So CLASSIC32 is only for 6xx families, not any of the others?  Then what's the "select 
6xx" for?  Isn't that redundant?

> +	  You do not want this if you are building a kernel for a 64 bit
> +	  IBM RS/6000 or an Apple G5, choose 6xx.

This needs to be reworded, as the English doesn't make sense.

-- 
Timur Tabi
Linux Kernel Developer @ Freescale

Re: [PATCH 1/6] powerpc: split out CPU specific options into a new Kconfig file

[Arnd Bergmann]

On Wednesday 02 May 2007, Timur Tabi wrote:
> Arnd Bergmann wrote:
> 
> > +config CLASSIC32
> > +	bool "52xx/6xx/7xx/74xx"
> > +	select PPC_FPU
> > +	select 6xx
> > +	help
> > +	  There are four families of PowerPC chips supported.  The more common
> > +	  types (601, 603, 604, 740, 750, 7400), the Motorola embedded
> > +	  versions (821, 823, 850, 855, 860, 52xx, 82xx, 83xx), the AMCC
> > +	  embedded versions (403 and 405) and the high end 64 bit Power
> > +	  processors (POWER 3, POWER4, and IBM PPC970 also known as G5).
> 
> Is this help text still accurate?  The bool line says "52xx/6xx/7xx/74xx", but you talk 
> about many more processors in the help text.  You mention the 83xx, but not the 85xx or 
> 86xx, nor do you mention Freescale.  Not only that, but the help text implies that 8xx, 
> 52xx, 82xx, and 83xx are part of the same family, but the bool text implies that 52xx is 
> part of a different family.

This patch just moves stuff around, one of the later patches fixes the
text.

> > +	  This option is the catch-all for 6xx types, including some of the
> > +	  embedded versions.  Unless there is see an option for the specific
> > +	  chip family you are using, you want this option.
> 
> So CLASSIC32 is only for 6xx families, not any of the others?  Then what's the "select 
> 6xx" for?  Isn't that redundant?

Currently, CLASSIC32 refers to all Open Firmware based 6xx machines, including
PowerMac, rs6000, CHRP and PReP. 6xx includes those, and also the embedded
platforms based on 6xx cores, like 86xx.

My last patch changes it so that CLASSIC32 and 6xx are actually synonyms,
and we could kill one of them.

> > +	  You do not want this if you are building a kernel for a 64 bit
> > +	  IBM RS/6000 or an Apple G5, choose 6xx.
> 
> This needs to be reworded, as the English doesn't make sense.

It also gets fixed in a later patch.

	Arnd <><

Re: [PATCH 1/6] powerpc: split out CPU specific options into a new Kconfig file

[Jon Loeliger]

On Wed, 2007-05-02 at 10:54, Timur Tabi wrote:
> Arnd Bergmann wrote:
> 
> > +config CLASSIC32
> > +	bool "52xx/6xx/7xx/74xx"
> > +	select PPC_FPU
> > +	select 6xx
> > +	help
> > +	  There are four families of PowerPC chips supported.  The more common
> > +	  types (601, 603, 604, 740, 750, 7400), the Motorola embedded
> > +	  versions (821, 823, 850, 855, 860, 52xx, 82xx, 83xx), the AMCC
> > +	  embedded versions (403 and 405) and the high end 64 bit Power
> > +	  processors (POWER 3, POWER4, and IBM PPC970 also known as G5).
> 
> Is this help text still accurate?  The bool line says "52xx/6xx/7xx/74xx", but you talk 
> about many more processors in the help text.  You mention the 83xx, but not the 85xx or 
> 86xx, nor do you mention Freescale.  Not only that, but the help text implies that 8xx, 
> 52xx, 82xx, and 83xx are part of the same family, but the bool text implies that 52xx is 
> part of a different family.

Timur,

Please read through the rest of the patch sequence.
This patch was just the "first step", moving things
around without additional changes.

jdl

[PATCH 2/6] powerpc: Move CONFIG_PPC64 into CPU selection

[Arnd Bergmann]

Currently, PPC64 is a top level configuration option in
arch/powerpc/Kconfig, which is somewhat unconventional.

Moving it into the CPU selection menu is a natural choice,
and is transparent to the rest of the configuration logic.

Signed-off-by: Arnd Bergmann <arnd@arndb.de>
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
@@ -1,37 +1,24 @@
-config PPC64
-	bool "64-bit kernel"
-	default n
-	help
-	  This option selects whether a 32-bit or a 64-bit kernel
-	  will be built.
-
 menu "Processor support"
 choice
 	prompt "Processor Type"
-	depends on PPC32
 	default 6xx
-
-config CLASSIC32
-	bool "52xx/6xx/7xx/74xx"
-	select PPC_FPU
-	select 6xx
 	help
 	  There are four families of PowerPC chips supported.  The more common
 	  types (601, 603, 604, 740, 750, 7400), the Motorola embedded
-	  versions (821, 823, 850, 855, 860, 52xx, 82xx, 83xx), the AMCC
-	  embedded versions (403 and 405) and the high end 64 bit Power
-	  processors (POWER 3, POWER4, and IBM PPC970 also known as G5).
-
-	  This option is the catch-all for 6xx types, including some of the
-	  embedded versions.  Unless there is see an option for the specific
-	  chip family you are using, you want this option.
+	  versions (8xx, 55xx, 85xx), the AMCC embedded version (403, 405,
+	  440, 460) and the 64 bit processors (POWER 3, POWER4, POWER5,
+	  POWER6, PowerPC 970, Cell/B.E., PA6T).
 
-	  You do not want this if you are building a kernel for a 64 bit
-	  IBM RS/6000 or an Apple G5, choose 6xx.
+	  If unsure, select 52xx/6xx/7xx/74xx.
 
-	  If unsure, select this option
+config PPC64
+	bool "any 64 bit PowerPC"
+	select PPC_FPU
 
-	  Note that the kernel runs in 32-bit mode even on 64-bit chips.
+config CLASSIC32
+	bool "52xx/6xx/7xx/74xx"
+	select PPC_FPU
+	select 6xx
 
 config PPC_82xx
 	bool "Freescale 82xx"
@@ -119,7 +106,6 @@ config E500
 
 config PPC_FPU
 	bool
-	default y if PPC64
 
 config BOOKE
 	bool

--

Re: [PATCH 2/6] powerpc: Move CONFIG_PPC64 into CPU selection

[Kumar Gala]

On May 2, 2007, at 6:47 AM, Arnd Bergmann wrote:

> Currently, PPC64 is a top level configuration option in
> arch/powerpc/Kconfig, which is somewhat unconventional.
>
> Moving it into the CPU selection menu is a natural choice,
> and is transparent to the rest of the configuration logic.
>
> Signed-off-by: Arnd Bergmann <arnd@arndb.de>

I know Paul made a very conscious decisions to make the 64-bit choice  
a top level config option when we moved to arch/powerpc.  This is  
patch effective reverts back to how we did things in arch/ppc.

I'll let it up to him to remind us why he wanted that since I dont  
remember.

- k

> 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
> @@ -1,37 +1,24 @@
> -config PPC64
> -	bool "64-bit kernel"
> -	default n
> -	help
> -	  This option selects whether a 32-bit or a 64-bit kernel
> -	  will be built.
> -
>  menu "Processor support"
>  choice
>  	prompt "Processor Type"
> -	depends on PPC32
>  	default 6xx
> -
> -config CLASSIC32
> -	bool "52xx/6xx/7xx/74xx"
> -	select PPC_FPU
> -	select 6xx
>  	help
>  	  There are four families of PowerPC chips supported.  The more  
> common
>  	  types (601, 603, 604, 740, 750, 7400), the Motorola embedded
> -	  versions (821, 823, 850, 855, 860, 52xx, 82xx, 83xx), the AMCC
> -	  embedded versions (403 and 405) and the high end 64 bit Power
> -	  processors (POWER 3, POWER4, and IBM PPC970 also known as G5).
> -
> -	  This option is the catch-all for 6xx types, including some of the
> -	  embedded versions.  Unless there is see an option for the specific
> -	  chip family you are using, you want this option.
> +	  versions (8xx, 55xx, 85xx), the AMCC embedded version (403, 405,
> +	  440, 460) and the 64 bit processors (POWER 3, POWER4, POWER5,
> +	  POWER6, PowerPC 970, Cell/B.E., PA6T).
>
> -	  You do not want this if you are building a kernel for a 64 bit
> -	  IBM RS/6000 or an Apple G5, choose 6xx.
> +	  If unsure, select 52xx/6xx/7xx/74xx.
>
> -	  If unsure, select this option
> +config PPC64
> +	bool "any 64 bit PowerPC"
> +	select PPC_FPU
>
> -	  Note that the kernel runs in 32-bit mode even on 64-bit chips.
> +config CLASSIC32
> +	bool "52xx/6xx/7xx/74xx"
> +	select PPC_FPU
> +	select 6xx
>
>  config PPC_82xx
>  	bool "Freescale 82xx"
> @@ -119,7 +106,6 @@ config E500
>
>  config PPC_FPU
>  	bool
> -	default y if PPC64
>
>  config BOOKE
>  	bool
>
> --

[PATCH 3/6] powerpc: move 82xx/83xx/86xx Kconfig options to platform selection

[Arnd Bergmann]

The cores used in the MPC82xx/83xx/86xx embedded controllers are very similar
to those in the 32 bit general-purpose processors, so it makes sense to
treat them as the same CPU family.

Choosing between the embedded platforms and the multiplatform code is
now done in the platform menu, but functionally everything stays the
same.

Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Index: linux-2.6/arch/powerpc/platforms/Kconfig
===================================================================
--- linux-2.6.orig/arch/powerpc/platforms/Kconfig
+++ linux-2.6/arch/powerpc/platforms/Kconfig
@@ -2,7 +2,7 @@ menu "Platform support"
 
 choice
 	prompt "Machine type"
-	depends on PPC64 || CLASSIC32
+	depends on PPC64 || 6xx
 	default PPC_MULTIPLATFORM
 
 config PPC_MULTIPLATFORM
@@ -23,8 +23,32 @@ config APUS
 	  Select APUS if configuring for a PowerUP Amiga.
 	  More information is available at:
 	  <http://linux-apus.sourceforge.net/>.
+
+config PPC_82xx
+	bool "Freescale 82xx"
+	depends on 6xx
+
+config PPC_83xx
+	bool "Freescale 83xx"
+	depends on 6xx
+	select FSL_SOC
+	select 83xx
+	select WANT_DEVICE_TREE
+
+config PPC_86xx
+	bool "Freescale 86xx"
+	depends on 6xx
+	select FSL_SOC
+	select FSL_PCIE
+	select ALTIVEC
+	help
+	  The Freescale E600 SoCs have 74xx cores.
 endchoice
 
+config CLASSIC32
+	def_bool y
+	depends on 6xx && PPC_MULTIPLATFORM
+
 source "arch/powerpc/platforms/pseries/Kconfig"
 source "arch/powerpc/platforms/iseries/Kconfig"
 source "arch/powerpc/platforms/chrp/Kconfig"
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
@@ -15,24 +15,10 @@ config PPC64
 	bool "any 64 bit PowerPC"
 	select PPC_FPU
 
-config CLASSIC32
-	bool "52xx/6xx/7xx/74xx"
-	select PPC_FPU
-	select 6xx
-
-config PPC_82xx
-	bool "Freescale 82xx"
-	select 6xx
+config 6xx
+	bool "52xx/6xx/7xx/74xx/82xx/83xx/86xx"
 	select PPC_FPU
 
-config PPC_83xx
-	bool "Freescale 83xx"
-	select 6xx
-	select FSL_SOC
-	select 83xx
-	select PPC_FPU
-	select WANT_DEVICE_TREE
-
 config PPC_85xx
 	bool "Freescale 85xx"
 	select E500
@@ -40,16 +26,6 @@ config PPC_85xx
 	select 85xx
 	select WANT_DEVICE_TREE
 
-config PPC_86xx
-	bool "Freescale 86xx"
-	select 6xx
-	select FSL_SOC
-	select FSL_PCIE
-	select PPC_FPU
-	select ALTIVEC
-	help
-	  The Freescale E600 SoCs have 74xx cores.
-
 config PPC_8xx
 	bool "Freescale 8xx"
 	select FSL_SOC

--

[PATCH 4/6] powerpc: rename add_bridge to avoid namespace clashes

[Arnd Bergmann]

Many platforms currently define their own add_bridge function, some
of them globally. This breaks some multiplatform configurations.
Prefixing each of these functions with the platform name avoids
this problem.

Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Index: linux-2.6/arch/powerpc/platforms/82xx/mpc82xx_ads.c
===================================================================
--- linux-2.6.orig/arch/powerpc/platforms/82xx/mpc82xx_ads.c
+++ linux-2.6/arch/powerpc/platforms/82xx/mpc82xx_ads.c
@@ -49,7 +49,7 @@
 #include <linux/fs_enet_pd.h>
 
 #include <sysdev/fsl_soc.h>
-#include <../sysdev/cpm2_pic.h>
+#include <../../sysdev/cpm2_pic.h>
 
 #include "pq2ads.h"
 
@@ -515,7 +515,7 @@ static int m82xx_pci_exclude_device(u_ch
 		return PCIBIOS_SUCCESSFUL;
 }
 
-void __init add_bridge(struct device_node *np)
+static void __init mpc82xx_add_bridge(struct device_node *np)
 {
 	int len;
 	struct pci_controller *hose;
@@ -584,7 +584,7 @@ static void __init mpc82xx_ads_setup_arc
 #ifdef CONFIG_PCI
 	ppc_md.pci_exclude_device = m82xx_pci_exclude_device;
 	for (np = NULL; (np = of_find_node_by_type(np, "pci")) != NULL;)
-		add_bridge(np);
+		mpc82xx_add_bridge(np);
 
 	of_node_put(np);
 #endif
Index: linux-2.6/arch/powerpc/platforms/83xx/mpc836x_mds.c
===================================================================
--- linux-2.6.orig/arch/powerpc/platforms/83xx/mpc836x_mds.c
+++ linux-2.6/arch/powerpc/platforms/83xx/mpc836x_mds.c
@@ -86,7 +86,7 @@ static void __init mpc836x_mds_setup_arc
 
 #ifdef CONFIG_PCI
 	for (np = NULL; (np = of_find_node_by_type(np, "pci")) != NULL;)
-		add_bridge(np);
+		mpc83xx_add_bridge(np);
 	ppc_md.pci_exclude_device = mpc83xx_exclude_device;
 #endif
 
Index: linux-2.6/arch/powerpc/platforms/83xx/mpc83xx.h
===================================================================
--- linux-2.6.orig/arch/powerpc/platforms/83xx/mpc83xx.h
+++ linux-2.6/arch/powerpc/platforms/83xx/mpc83xx.h
@@ -27,7 +27,7 @@
  * mpc83xx_* files. Mostly for use by mpc83xx_setup
  */
 
-extern int add_bridge(struct device_node *dev);
+extern int mpc83xx_add_bridge(struct device_node *dev);
 extern int mpc83xx_exclude_device(u_char bus, u_char devfn);
 extern void mpc83xx_restart(char *cmd);
 extern long mpc83xx_time_init(void);
Index: linux-2.6/arch/powerpc/platforms/83xx/mpc8313_rdb.c
===================================================================
--- linux-2.6.orig/arch/powerpc/platforms/83xx/mpc8313_rdb.c
+++ linux-2.6/arch/powerpc/platforms/83xx/mpc8313_rdb.c
@@ -47,7 +47,7 @@ static void __init mpc8313_rdb_setup_arc
 
 #ifdef CONFIG_PCI
 	for (np = NULL; (np = of_find_node_by_type(np, "pci")) != NULL;)
-		add_bridge(np);
+		mpc83xx_add_bridge(np);
 
 	ppc_md.pci_exclude_device = mpc83xx_exclude_device;
 #endif
Index: linux-2.6/arch/powerpc/platforms/83xx/mpc832x_mds.c
===================================================================
--- linux-2.6.orig/arch/powerpc/platforms/83xx/mpc832x_mds.c
+++ linux-2.6/arch/powerpc/platforms/83xx/mpc832x_mds.c
@@ -80,7 +80,7 @@ static void __init mpc832x_sys_setup_arc
 
 #ifdef CONFIG_PCI
 	for (np = NULL; (np = of_find_node_by_type(np, "pci")) != NULL;)
-		add_bridge(np);
+		mpc83xx_add_bridge(np);
 	ppc_md.pci_exclude_device = mpc83xx_exclude_device;
 #endif
 
Index: linux-2.6/arch/powerpc/platforms/83xx/mpc832x_rdb.c
===================================================================
--- linux-2.6.orig/arch/powerpc/platforms/83xx/mpc832x_rdb.c
+++ linux-2.6/arch/powerpc/platforms/83xx/mpc832x_rdb.c
@@ -51,7 +51,7 @@ static void __init mpc832x_rdb_setup_arc
 
 #ifdef CONFIG_PCI
 	for (np = NULL; (np = of_find_node_by_type(np, "pci")) != NULL;)
-		add_bridge(np);
+		mpc83xx_add_bridge(np);
 
 	ppc_md.pci_exclude_device = mpc83xx_exclude_device;
 #endif
Index: linux-2.6/arch/powerpc/platforms/83xx/mpc834x_itx.c
===================================================================
--- linux-2.6.orig/arch/powerpc/platforms/83xx/mpc834x_itx.c
+++ linux-2.6/arch/powerpc/platforms/83xx/mpc834x_itx.c
@@ -57,7 +57,7 @@ static void __init mpc834x_itx_setup_arc
 
 #ifdef CONFIG_PCI
 	for (np = NULL; (np = of_find_node_by_type(np, "pci")) != NULL;)
-		add_bridge(np);
+		mpc83xx_add_bridge(np);
 
 	ppc_md.pci_exclude_device = mpc83xx_exclude_device;
 #endif
Index: linux-2.6/arch/powerpc/platforms/83xx/mpc834x_mds.c
===================================================================
--- linux-2.6.orig/arch/powerpc/platforms/83xx/mpc834x_mds.c
+++ linux-2.6/arch/powerpc/platforms/83xx/mpc834x_mds.c
@@ -127,7 +127,7 @@ static void __init mpc834x_mds_setup_arc
 
 #ifdef CONFIG_PCI
 	for (np = NULL; (np = of_find_node_by_type(np, "pci")) != NULL;)
-		add_bridge(np);
+		mpc83xx_add_bridge(np);
 
 	ppc_md.pci_exclude_device = mpc83xx_exclude_device;
 #endif
Index: linux-2.6/arch/powerpc/platforms/83xx/pci.c
===================================================================
--- linux-2.6.orig/arch/powerpc/platforms/83xx/pci.c
+++ linux-2.6/arch/powerpc/platforms/83xx/pci.c
@@ -45,7 +45,7 @@ int mpc83xx_exclude_device(u_char bus, u
 	return PCIBIOS_SUCCESSFUL;
 }
 
-int __init add_bridge(struct device_node *dev)
+int __init mpc83xx_add_bridge(struct device_node *dev)
 {
 	int len;
 	struct pci_controller *hose;
Index: linux-2.6/arch/powerpc/platforms/85xx/mpc85xx.h
===================================================================
--- linux-2.6.orig/arch/powerpc/platforms/85xx/mpc85xx.h
+++ linux-2.6/arch/powerpc/platforms/85xx/mpc85xx.h
@@ -15,4 +15,4 @@
  */
 
 extern void mpc85xx_restart(char *);
-extern int add_bridge(struct device_node *dev);
+extern int mpc85xx_add_bridge(struct device_node *dev);
Index: linux-2.6/arch/powerpc/platforms/85xx/mpc85xx_ads.c
===================================================================
--- linux-2.6.orig/arch/powerpc/platforms/85xx/mpc85xx_ads.c
+++ linux-2.6/arch/powerpc/platforms/85xx/mpc85xx_ads.c
@@ -241,7 +241,7 @@ static void __init mpc85xx_ads_setup_arc
 
 #ifdef CONFIG_PCI
 	for (np = NULL; (np = of_find_node_by_type(np, "pci")) != NULL;)
-		add_bridge(np);
+		mpc85xx_add_bridge(np);
 	ppc_md.pci_exclude_device = mpc85xx_exclude_device;
 #endif
 }
Index: linux-2.6/arch/powerpc/platforms/85xx/mpc85xx_cds.c
===================================================================
--- linux-2.6.orig/arch/powerpc/platforms/85xx/mpc85xx_cds.c
+++ linux-2.6/arch/powerpc/platforms/85xx/mpc85xx_cds.c
@@ -257,7 +257,7 @@ static void __init mpc85xx_cds_setup_arc
 
 #ifdef CONFIG_PCI
 	for (np = NULL; (np = of_find_node_by_type(np, "pci")) != NULL;)
-		add_bridge(np);
+		mpc85xx_add_bridge(np);
 
 	ppc_md.pcibios_fixup = mpc85xx_cds_pcibios_fixup;
 	ppc_md.pci_exclude_device = mpc85xx_exclude_device;
Index: linux-2.6/arch/powerpc/platforms/85xx/mpc85xx_mds.c
===================================================================
--- linux-2.6.orig/arch/powerpc/platforms/85xx/mpc85xx_mds.c
+++ linux-2.6/arch/powerpc/platforms/85xx/mpc85xx_mds.c
@@ -100,7 +100,7 @@ static void __init mpc85xx_mds_setup_arc
 
 #ifdef CONFIG_PCI
 	for (np = NULL; (np = of_find_node_by_type(np, "pci")) != NULL;) {
-		add_bridge(np);
+		mpc85xx_add_bridge(np);
 	}
 	of_node_put(np);
 #endif
Index: linux-2.6/arch/powerpc/platforms/85xx/pci.c
===================================================================
--- linux-2.6.orig/arch/powerpc/platforms/85xx/pci.c
+++ linux-2.6/arch/powerpc/platforms/85xx/pci.c
@@ -36,7 +36,7 @@
 int mpc85xx_pci2_busno = 0;
 
 #ifdef CONFIG_PCI
-int __init add_bridge(struct device_node *dev)
+int __init mpc85xx_add_bridge(struct device_node *dev)
 {
 	int len;
 	struct pci_controller *hose;
Index: linux-2.6/arch/powerpc/platforms/86xx/mpc86xx.h
===================================================================
--- linux-2.6.orig/arch/powerpc/platforms/86xx/mpc86xx.h
+++ linux-2.6/arch/powerpc/platforms/86xx/mpc86xx.h
@@ -15,7 +15,7 @@
  * mpc86xx_* files. Mostly for use by mpc86xx_setup().
  */
 
-extern int add_bridge(struct device_node *dev);
+extern int mpc86xx_add_bridge(struct device_node *dev);
 
 extern int mpc86xx_exclude_device(u_char bus, u_char devfn);
 
Index: linux-2.6/arch/powerpc/platforms/86xx/mpc86xx_hpcn.c
===================================================================
--- linux-2.6.orig/arch/powerpc/platforms/86xx/mpc86xx_hpcn.c
+++ linux-2.6/arch/powerpc/platforms/86xx/mpc86xx_hpcn.c
@@ -359,7 +359,7 @@ mpc86xx_hpcn_setup_arch(void)
 
 #ifdef CONFIG_PCI
 	for (np = NULL; (np = of_find_node_by_type(np, "pci")) != NULL;)
-		add_bridge(np);
+		mpc86xx_add_bridge(np);
 
 	ppc_md.pci_exclude_device = mpc86xx_exclude_device;
 #endif
Index: linux-2.6/arch/powerpc/platforms/86xx/pci.c
===================================================================
--- linux-2.6.orig/arch/powerpc/platforms/86xx/pci.c
+++ linux-2.6/arch/powerpc/platforms/86xx/pci.c
@@ -148,7 +148,7 @@ int mpc86xx_exclude_device(u_char bus, u
 	return PCIBIOS_SUCCESSFUL;
 }
 
-int __init add_bridge(struct device_node *dev)
+int __init mpc86xx_add_bridge(struct device_node *dev)
 {
 	int len;
 	struct pci_controller *hose;
Index: linux-2.6/arch/powerpc/platforms/embedded6xx/linkstation.c
===================================================================
--- linux-2.6.orig/arch/powerpc/platforms/embedded6xx/linkstation.c
+++ linux-2.6/arch/powerpc/platforms/embedded6xx/linkstation.c
@@ -54,7 +54,7 @@ static struct mtd_partition linkstation_
 	},
 };
 
-static int __init add_bridge(struct device_node *dev)
+static int __init linkstation_add_bridge(struct device_node *dev)
 {
 	int len;
 	struct pci_controller *hose;
@@ -92,7 +92,7 @@ static void __init linkstation_setup_arc
 
 	/* Lookup PCI host bridges */
 	for (np = NULL; (np = of_find_node_by_type(np, "pci")) != NULL;)
-		add_bridge(np);
+		linkstation_add_bridge(np);
 
 	printk(KERN_INFO "BUFFALO Network Attached Storage Series\n");
 	printk(KERN_INFO "(C) 2002-2005 BUFFALO INC.\n");
Index: linux-2.6/arch/powerpc/platforms/maple/pci.c
===================================================================
--- linux-2.6.orig/arch/powerpc/platforms/maple/pci.c
+++ linux-2.6/arch/powerpc/platforms/maple/pci.c
@@ -444,7 +444,7 @@ static void __init setup_u3_ht(struct pc
 	u3_ht = hose;
 }
 
-static int __init add_bridge(struct device_node *dev)
+static int __init maple_add_bridge(struct device_node *dev)
 {
 	int len;
 	struct pci_controller *hose;
@@ -558,7 +558,7 @@ void __init maple_pci_init(void)
 			continue;
 		if ((device_is_compatible(np, "u4-pcie") ||
 		     device_is_compatible(np, "u3-agp")) &&
-		    add_bridge(np) == 0)
+		    maple_add_bridge(np) == 0)
 			of_node_get(np);
 
 		if (device_is_compatible(np, "u3-ht")) {
@@ -570,7 +570,7 @@ void __init maple_pci_init(void)
 
 	/* Now setup the HyperTransport host if we found any
 	 */
-	if (ht && add_bridge(ht) != 0)
+	if (ht && maple_add_bridge(ht) != 0)
 		of_node_put(ht);
 
         /*
Index: linux-2.6/arch/powerpc/platforms/pasemi/pci.c
===================================================================
--- linux-2.6.orig/arch/powerpc/platforms/pasemi/pci.c
+++ linux-2.6/arch/powerpc/platforms/pasemi/pci.c
@@ -132,7 +132,7 @@ static void __init setup_pa_pxp(struct p
 	hose->cfg_data = ioremap(0xe0000000, 0x10000000);
 }
 
-static int __init add_bridge(struct device_node *dev)
+static int __init pas_add_bridge(struct device_node *dev)
 {
 	struct pci_controller *hose;
 
@@ -198,7 +198,7 @@ void __init pas_pci_init(void)
 	}
 
 	for (np = NULL; (np = of_get_next_child(root, np)) != NULL;)
-		if (np->name && !strcmp(np->name, "pxp") && !add_bridge(np))
+		if (np->name && !strcmp(np->name, "pxp") && !pas_add_bridge(np))
 			of_node_get(np);
 
 	of_node_put(root);
Index: linux-2.6/arch/powerpc/platforms/powermac/pci.c
===================================================================
--- linux-2.6.orig/arch/powerpc/platforms/powermac/pci.c
+++ linux-2.6/arch/powerpc/platforms/powermac/pci.c
@@ -35,8 +35,6 @@
 #define DBG(x...)
 #endif
 
-static int add_bridge(struct device_node *dev);
-
 /* XXX Could be per-controller, but I don't think we risk anything by
  * assuming we won't have both UniNorth and Bandit */
 static int has_uninorth;
@@ -897,7 +895,7 @@ static void __init setup_u3_ht(struct pc
  * "pci" (a MPC106) and no bandit or chaos bridges, and contrariwise,
  * if we have one or more bandit or chaos bridges, we don't have a MPC106.
  */
-static int __init add_bridge(struct device_node *dev)
+static int __init pmac_add_bridge(struct device_node *dev)
 {
 	int len;
 	struct pci_controller *hose;
@@ -1036,7 +1034,7 @@ void __init pmac_pci_init(void)
 		if (strcmp(np->name, "bandit") == 0
 		    || strcmp(np->name, "chaos") == 0
 		    || strcmp(np->name, "pci") == 0) {
-			if (add_bridge(np) == 0)
+			if (pmac_add_bridge(np) == 0)
 				of_node_get(np);
 		}
 		if (strcmp(np->name, "ht") == 0) {
@@ -1050,7 +1048,7 @@ void __init pmac_pci_init(void)
 	/* Probe HT last as it relies on the agp resources to be already
 	 * setup
 	 */
-	if (ht && add_bridge(ht) != 0)
+	if (ht && pmac_add_bridge(ht) != 0)
 		of_node_put(ht);
 
 	/*

--

[PATCH 5/6] powerpc: Multiplatformize 8{2,3,6}xx configuration

[Arnd Bergmann]

All platforms based on 6xx compatible cores should be able to
coexisting in a single kernel image and do all necessary configuration
based on the device tree.

This moves the missing 8{2,3,6}xx platforms under
CONFIG_PPC_MULTIPLATFORM to make that possible to configure.

Signed-off-by: Arnd Bergmann <arnd@arndb.de>
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
@@ -1,10 +1,10 @@
-choice
-	prompt "Machine Type"
-	depends on PPC_82xx
-	default MPC82xx_ADS
+config PPC_82xx
+	bool "Freescale 82xx"
+	depends on PPC_MULTIPLATFORM && 6xx
 
 config MPC82xx_ADS
 	bool "Freescale MPC82xx ADS"
+	depends on PPC_82xx
 	select DEFAULT_UIMAGE
 	select PQ2ADS
 	select 8272
@@ -13,8 +13,6 @@ config MPC82xx_ADS
 	help
 	This option enables support for the MPC8272 ADS board
 
-endchoice
-
 config PQ2ADS
 	bool
 	default n
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
@@ -1,16 +1,20 @@
-choice
-	prompt "Machine Type"
-	depends on PPC_83xx
-	default MPC834x_MDS
+config PPC_83xx
+	bool "Freescale 83xx"
+	depends on PPC_MULTIPLATFORM && 6xx
+	select FSL_SOC
+	select 83xx
+	select WANT_DEVICE_TREE
 
 config MPC8313_RDB
 	bool "Freescale MPC8313 RDB"
+	depends on PPC_83xx
 	select DEFAULT_UIMAGE
 	help
 	  This option enables support for the MPC8313 RDB board.
 
 config MPC832x_MDS
 	bool "Freescale MPC832x MDS"
+	depends on PPC_83xx
 	select DEFAULT_UIMAGE
 	select QUICC_ENGINE
 	help
@@ -18,6 +22,7 @@ config MPC832x_MDS
 
 config MPC832x_RDB
 	bool "Freescale MPC832x RDB"
+	depends on PPC_83xx
 	select DEFAULT_UIMAGE
 	select QUICC_ENGINE
 	help
@@ -25,6 +30,7 @@ config MPC832x_RDB
 
 config MPC834x_MDS
 	bool "Freescale MPC834x MDS"
+	depends on PPC_83xx
 	select DEFAULT_UIMAGE
 	help
 	  This option enables support for the MPC 834x MDS evaluation board.
@@ -36,6 +42,7 @@ config MPC834x_MDS
 
 config MPC834x_ITX
 	bool "Freescale MPC834x ITX"
+	depends on PPC_83xx
 	select DEFAULT_UIMAGE
 	help
 	  This option enables support for the MPC 834x ITX evaluation board.
@@ -45,13 +52,12 @@ config MPC834x_ITX
 
 config MPC836x_MDS
 	bool "Freescale MPC836x MDS"
+	depends on PPC_83xx
 	select DEFAULT_UIMAGE
 	select QUICC_ENGINE
 	help
 	  This option enables support for the MPC836x MDS Processor Board.
 
-endchoice
-
 config PPC_MPC831x
 	bool
 	select PPC_UDBG_16550
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
@@ -1,17 +1,20 @@
-choice
-	prompt "Machine Type"
-	depends on PPC_86xx
-	default MPC8641_HPCN
+config PPC_86xx
+	bool "Freescale 86xx"
+	depends on PPC_MULTIPLATFORM && 6xx
+	select FSL_SOC
+	select FSL_PCIE
+	select ALTIVEC
+	help
+	  The Freescale E600 SoCs have 74xx cores.
 
 config MPC8641_HPCN
 	bool "Freescale MPC8641 HPCN"
+	depends on PPC_86xx
 	select PPC_I8259
 	select DEFAULT_UIMAGE
 	help
 	  This option enables support for the MPC8641 HPCN board.
 
-endchoice
-
 config MPC8641
 	bool
 	select PPC_INDIRECT_PCI
Index: linux-2.6/arch/powerpc/platforms/Kconfig
===================================================================
--- linux-2.6.orig/arch/powerpc/platforms/Kconfig
+++ linux-2.6/arch/powerpc/platforms/Kconfig
@@ -24,25 +24,6 @@ config APUS
 	  More information is available at:
 	  <http://linux-apus.sourceforge.net/>.
 
-config PPC_82xx
-	bool "Freescale 82xx"
-	depends on 6xx
-
-config PPC_83xx
-	bool "Freescale 83xx"
-	depends on 6xx
-	select FSL_SOC
-	select 83xx
-	select WANT_DEVICE_TREE
-
-config PPC_86xx
-	bool "Freescale 86xx"
-	depends on 6xx
-	select FSL_SOC
-	select FSL_PCIE
-	select ALTIVEC
-	help
-	  The Freescale E600 SoCs have 74xx cores.
 endchoice
 
 config CLASSIC32

--

[PATCH 6/6] powerpc: autoselect optimal -mcpu= flag by platform

[Arnd Bergmann]

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
@@ -1,6 +1,7 @@
 config PPC_MPC52xx
 	bool
 	default n
+	select CPU_603e
 
 config PPC_MPC5200
 	bool
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
@@ -1,6 +1,7 @@
 config PPC_82xx
 	bool "Freescale 82xx"
 	depends on PPC_MULTIPLATFORM && 6xx
+	select CPU_603e
 
 config MPC82xx_ADS
 	bool "Freescale MPC82xx ADS"
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
@@ -4,6 +4,7 @@ config PPC_83xx
 	select FSL_SOC
 	select 83xx
 	select WANT_DEVICE_TREE
+	select CPU_603e
 
 config MPC8313_RDB
 	bool "Freescale MPC8313 RDB"
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
@@ -4,6 +4,7 @@ config PPC_86xx
 	select FSL_SOC
 	select FSL_PCIE
 	select ALTIVEC
+	select CPU_74xx
 	help
 	  The Freescale E600 SoCs have 74xx cores.
 
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
@@ -44,9 +44,232 @@ 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
@@ -22,6 +23,7 @@ config MPC7448HPC2
 	select PPC_UDBG_16550
 	select MPIC
 	select MPIC_WEIRD
+	select CPU_74xx
 	help
 	  Select MPC7448HPC2 if configuring for Freescale MPC7448HPC2 (Taiga)
 	  platform
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
@@ -6,6 +6,7 @@ config PPC_PASEMI
 	select PPC_UDBG_16550
 	select GENERIC_TBSYNC
 	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
@@ -77,24 +77,23 @@ 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)
 
@@ -106,10 +105,6 @@ 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