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Commit 8338b030 authored by Tom Rini's avatar Tom Rini
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PPC32: Re-arrange arch/ppc/Kconfig, from Hollis Blanchard <hollis@penguinppc.org>

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arch/ppc/Kconfig
View file @ 8338b030
......@@ -2,6 +2,8 @@
# see Documentation/kbuild/kconfig-language.txt.
#
mainmenu "Linux/PowerPC Kernel Configuration"
config MMU
bool
default y
......@@ -20,32 +22,19 @@ config HAVE_DEC_LOCK
bool
default y
mainmenu "Linux/PowerPC Kernel Configuration"
source "init/Kconfig"
menu "Platform support"
config PPC
bool
default y
---help---
The PowerPC is a modern RISC architecture descended from the POWER
architecture designed by IBM. The PowerPC architecture is designed
to allow high-speed implementations which can execute several
instructions in each clock cycle. IBM and Motorola design and
manufacture PowerPC processors aimed at embedded, desktop and server
applications. PowerPC chips are used in Apple Power Macintoshes
(including iMacs, iBooks and PowerBooks), in IBM pSeries (RS/6000)
and iSeries (AS/400) machines, and in a broad range of embedded
applications. The Linux PowerPC port has a home page at
<http://penguinppc.org/intro.shtml>.
config PPC32
bool
default y
source "init/Kconfig"
menu "Processor"
choice
prompt "Processor Type"
default 6xx
......@@ -82,13 +71,149 @@ config PTE_64BIT
depends on 44x
default y
source arch/ppc/platforms/4xx/Kconfig
config ALTIVEC
bool "AltiVec Support"
depends on 6xx && !8260
---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.
config GENERIC_ISA_DMA
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 TAU
bool "Thermal Management Support"
depends on 6xx && !8260
help
G3 and G4 processors have an on-chip temperature sensor called the
'Thermal Assist Unit (TAU)', which, in theory, can measure the on-die
temperature within 2-4 degrees Celsius. This option shows the current
on-die temperature in /proc/cpuinfo if the cpu supports it.
Unfortunately, on some chip revisions, this sensor is very inaccurate
and in some cases, does not work at all, so don't assume the cpu
temp is actually what /proc/cpuinfo says it is.
config TAU_INT
bool "Interrupt driven TAU driver (DANGEROUS)"
depends on TAU
---help---
The TAU supports an interrupt driven mode which causes an interrupt
whenever the temperature goes out of range. This is the fastest way
to get notified the temp has exceeded a range. With this option off,
a timer is used to re-check the temperature periodically.
However, on some cpus it appears that the TAU interrupt hardware
is buggy and can cause a situation which would lead unexplained hard
lockups.
Unless you are extending the TAU driver, or enjoy kernel/hardware
debugging, leave this option off.
config TAU_AVERAGE
bool "Average high and low temp"
depends on TAU
---help---
The TAU hardware can compare the temperature to an upper and lower
bound. The default behavior is to show both the upper and lower
bound in /proc/cpuinfo. If the range is large, the temperature is
either changing a lot, or the TAU hardware is broken (likely on some
G4's). If the range is small (around 4 degrees), the temperature is
relatively stable. If you say Y here, a single temperature value,
halfway between the upper and lower bounds, will be reported in
/proc/cpuinfo.
If in doubt, say N here.
config MATH_EMULATION
bool "Math emulation"
depends on 4xx || 8xx
---help---
Some PowerPC chips designed for embedded applications do not have
a floating-point unit and therefore do not implement the
floating-point instructions in the PowerPC instruction set. If you
say Y here, the kernel will include code to emulate a floating-point
unit, which will allow programs that use floating-point
instructions to run.
If you have an Apple machine or an IBM RS/6000 or pSeries machine,
or any machine with a 6xx, 7xx or 7xxx series processor, say N
here. Saying Y here will not hurt performance (on any machine) but
will increase the size of the kernel.
config CPU_FREQ
bool "CPU Frequency scaling"
help
Clock scaling allows you to change the clock speed of CPUs on the
fly. This is a nice method to save battery power on notebooks,
because the lower the clock speed, the less power the CPU consumes.
For more information, take a look at linux/Documentation/cpufreq or
at <http://www.brodo.de/cpufreq/>
If in doubt, say N.
config CPU_FREQ_TABLE
bool
depends on POWER3 || 6xx && !8260
depends on CPU_FREQ
default y
config CPU_FREQ_PROC_INTF
bool "/proc/cpufreq interface (DEPRECATED)"
depends on CPU_FREQ && PROC_FS
help
This enables the /proc/cpufreq interface for controlling
CPUFreq. Please note that it is recommended to use the sysfs
interface instead (which is built automatically).
For details, take a look at linux/Documentation/cpufreq.
If in doubt, say N.
config CPU_FREQ_24_API
bool "/proc/sys/cpu/ interface (2.4. / OLD)"
depends on CPU_FREQ
help
This enables the /proc/sys/cpu/ sysctl interface for controlling
CPUFreq, as known from the 2.4.-kernel patches for CPUFreq. 2.5
uses a sysfs interface instead. Please note that some drivers do
not work well with the 2.4. /proc/sys/cpu sysctl interface,
so if in doubt, say N here.
For details, take a look at linux/Documentation/cpufreq.
If in doubt, say N.
config CPU_FREQ_PMAC
bool "Support for Apple PowerBooks"
depends on CPU_FREQ && ADB_PMU
help
This adds support for frequency switching on Apple PowerBooks,
this currently includes some models of iBook & Titanium
PowerBook.
config PPC601_SYNC_FIX
bool "Workarounds for PPC601 bugs"
depends on 6xx && !POWER3
help
Some versions of the PPC601 (the first PowerPC chip) have bugs which
mean that extra synchronization instructions are required near
certain instructions, typically those that make major changes to the
CPU state. These extra instructions reduce performance slightly.
If you say N here, these extra instructions will not be included,
resulting in a kernel which will run faster but may not run at all
on some systems with the PPC601 chip.
If in doubt, say Y here.
source arch/ppc/platforms/4xx/Kconfig
config PPC64BRIDGE
bool
depends on POWER3
......@@ -99,18 +224,17 @@ config PPC_STD_MMU
depends on 6xx || POWER3
default y
config SERIAL_CONSOLE
bool
depends on 8xx || 8260
default y
config NOT_COHERENT_CACHE
bool
depends on 4xx || 8xx
default y
endmenu
menu "Platform options"
choice
prompt "Machine Type"
prompt "8xx Machine Type"
depends on 8xx
default RPXLITE
......@@ -333,16 +457,6 @@ config WINCEPT
endchoice
config TQM8xxL
bool
depends on 8xx && (TQM823L || TQM850L || FPS850L || TQM855L || TQM860L || SM850)
default y
config EMBEDDEDBOOT
bool
depends on 8xx || 8260
default y
choice
prompt "Machine Type"
depends on 6xx || POWER3
......@@ -463,6 +577,16 @@ config TQM8260
endchoice
config TQM8xxL
bool
depends on 8xx && (TQM823L || TQM850L || FPS850L || TQM855L || TQM860L || SM850)
default y
config EMBEDDEDBOOT
bool
depends on 8xx || 8260
default y
config 8260
bool "MPC8260 CPM Support" if WILLOW
depends on 6xx
......@@ -473,7 +597,6 @@ config 8260
you wish to build a kernel for a machine with specifically an 8260
for a CPU.
config PPC_CHRP
bool
depends on PPC_MULTIPLATFORM
......@@ -504,6 +627,11 @@ config FORCE
depends on 6xx && (PCORE || POWERPMC250)
default y
config GT64260
bool
depends on EV64260
default y
config EPIC_SERIAL_MODE
bool
depends on 6xx && (LOPEC || SANDPOINT)
......@@ -513,16 +641,6 @@ config MPC10X_STORE_GATHERING
bool "Enable MPC10x store gathering"
depends on FORCE || SANDPOINT
config GT64260
bool
depends on EV64260
default y
config SERIAL_CONSOLE_BAUD
int
depends on EV64260
default "115200"
config CPC710_DATA_GATHERING
bool "Enable CPC710 data gathering"
depends on K2
......@@ -535,6 +653,24 @@ config SPRUCE_BAUD_33M
bool "Spruce baud clock support"
depends on SPRUCE
config PC_KEYBOARD
bool "PC PS/2 style Keyboard"
depends on 4xx || 8260
config SERIAL_CONSOLE
bool
depends on 8xx || 8260
default y
config SERIAL_CONSOLE_BAUD
int
depends on EV64260
default "115200"
config PPCBUG_NVRAM
bool "Enable reading PPCBUG NVRAM during boot" if PPLUS || LOPEC
default y if PPC_PREP
config SMP
bool "Symmetric multi-processing support"
---help---
......@@ -581,248 +717,22 @@ config PREEMPT
Say Y here if you are building a kernel for a desktop, embedded
or real-time system. Say N if you are unsure.
config ALTIVEC
bool "AltiVec Support"
depends on 6xx && !8260
---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.
config HIGHMEM
bool "High memory support"
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).
config KERNEL_ELF
bool
default y
If in doubt, say Y here.
source "fs/Kconfig.binfmt"
config TAU
bool "Thermal Management Support"
depends on 6xx && !8260
config PROC_DEVICETREE
bool "Support for Open Firmware device tree in /proc"
depends on PPC_OF && PROC_FS
help
G3 and G4 processors have an on-chip temperature sensor called the
'Thermal Assist Unit (TAU)', which, in theory, can measure the on-die
temperature within 2-4 degrees Celsius. This option shows the current
on-die temperature in /proc/cpuinfo if the cpu supports it.
Unfortunately, on some chip revisions, this sensor is very inaccurate
and in some cases, does not work at all, so don't assume the cpu
temp is actually what /proc/cpuinfo says it is.
config TAU_INT
bool "Interrupt driven TAU driver (DANGEROUS)"
depends on TAU
---help---
The TAU supports an interrupt driven mode which causes an interrupt
whenever the temperature goes out of range. This is the fastest way
to get notified the temp has exceeded a range. With this option off,
a timer is used to re-check the temperature periodically.
However, on some cpus it appears that the TAU interrupt hardware
is buggy and can cause a situation which would lead unexplained hard
lockups.
Unless you are extending the TAU driver, or enjoy kernel/hardware
debugging, leave this option off.
config TAU_AVERAGE
bool "Average high and low temp"
depends on TAU
---help---
The TAU hardware can compare the temperature to an upper and lower
bound. The default behavior is to show both the upper and lower
bound in /proc/cpuinfo. If the range is large, the temperature is
either changing a lot, or the TAU hardware is broken (likely on some
G4's). If the range is small (around 4 degrees), the temperature is
relatively stable. If you say Y here, a single temperature value,
halfway between the upper and lower bounds, will be reported in
/proc/cpuinfo.
If in doubt, say N here.
config MATH_EMULATION
bool "Math emulation"
depends on 4xx || 8xx
---help---
Some PowerPC chips designed for embedded applications do not have
a floating-point unit and therefore do not implement the
floating-point instructions in the PowerPC instruction set. If you
say Y here, the kernel will include code to emulate a floating-point
unit, which will allow programs that use floating-point
instructions to run.
If you have an Apple machine or an IBM RS/6000 or pSeries machine,
or any machine with a 6xx, 7xx or 7xxx series processor, say N
here. Saying Y here will not hurt performance (on any machine) but
will increase the size of the kernel.
config CPU_FREQ
bool "CPU Frequency scaling"
help
Clock scaling allows you to change the clock speed of CPUs on the
fly. This is a nice method to save battery power on notebooks,
because the lower the clock speed, the less power the CPU consumes.
For more information, take a look at linux/Documentation/cpufreq or
at <http://www.brodo.de/cpufreq/>
If in doubt, say N.
config CPU_FREQ_TABLE
bool
depends on CPU_FREQ
default y
config CPU_FREQ_PROC_INTF
bool "/proc/cpufreq interface (DEPRECATED)"
depends on CPU_FREQ && PROC_FS
help
This enables the /proc/cpufreq interface for controlling
CPUFreq. Please note that it is recommended to use the sysfs
interface instead (which is built automatically).
For details, take a look at linux/Documentation/cpufreq.
If in doubt, say N.
config CPU_FREQ_24_API
bool "/proc/sys/cpu/ interface (2.4. / OLD)"
depends on CPU_FREQ
help
This enables the /proc/sys/cpu/ sysctl interface for controlling
CPUFreq, as known from the 2.4.-kernel patches for CPUFreq. 2.5
uses a sysfs interface instead. Please note that some drivers do
not work well with the 2.4. /proc/sys/cpu sysctl interface,
so if in doubt, say N here.
For details, take a look at linux/Documentation/cpufreq.
If in doubt, say N.
config CPU_FREQ_PMAC
bool "Support for Apple PowerBooks"
depends on CPU_FREQ && ADB_PMU
help
This adds support for frequency switching on Apple PowerBooks,
this currently includes some models of iBook & Titanium
PowerBook.
endmenu
menu "General setup"
config HIGHMEM
bool "High memory support"
config ISA
bool "Support for ISA-bus hardware"
depends on PPC_PREP || PPC_CHRP
help
Find out whether you have ISA slots on your motherboard. ISA is the
name of a bus system, i.e. the way the CPU talks to the other stuff
inside your box. If you have an Apple machine, say N here; if you
have an IBM RS/6000 or pSeries machine or a PReP machine, say Y. If
you have an embedded board, consult your board documentation.
config EISA
bool
help
The Extended Industry Standard Architecture (EISA) bus is a bus
architecture used on some older intel-based PCs.
config SBUS
bool
# Yes MCA RS/6000s exist but Linux-PPC does not currently support any
config MCA
bool
help
MicroChannel Architecture is found in some older IBM RS/6000
machines. It is a bus system similar to PCI or ISA. MCA-based
RS/6000 machines are currently not supported by Linux.
config PCI
bool "PCI support" if 40x || 8260
default y if !40x && !8260 && !8xx && !APUS
default PCI_PERMEDIA if !4xx && !8260 && !8xx && APUS
default PCI_QSPAN if !4xx && !8260 && 8xx
help
Find out whether your system includes a PCI bus. PCI is the name of
a bus system, i.e. the way the CPU talks to the other stuff inside
your box. If you say Y here, the kernel will include drivers and
infrastructure code to support PCI bus devices.
config PCI_DOMAINS
bool
default PCI
config PC_KEYBOARD
bool "PC PS/2 style Keyboard"
depends on 4xx || 8260
config PCI_QSPAN
bool "QSpan PCI"
depends on !4xx && !8260 && 8xx
help
Say Y here if you have a system based on a Motorola 8xx-series
embedded processor with a QSPAN PCI interface, otherwise say N.
config PCI_PERMEDIA
bool "PCI for Permedia2"
depends on !4xx && !8xx && APUS
config KERNEL_ELF
bool
default y
source "fs/Kconfig.binfmt"
source "drivers/pci/Kconfig"
config HOTPLUG
bool "Support for hot-pluggable devices"
---help---
Say Y here if you want to plug devices into your computer while
the system is running, and be able to use them quickly. In many
cases, the devices can likewise be unplugged at any time too.
One well known example of this is PCMCIA- or PC-cards, credit-card
size devices such as network cards, modems or hard drives which are
plugged into slots found on all modern laptop computers. Another
example, used on modern desktops as well as laptops, is USB.
Enable HOTPLUG and KMOD, and build a modular kernel. Get agent
software (at <http://linux-hotplug.sourceforge.net/>) and install it.
Then your kernel will automatically call out to a user mode "policy
agent" (/sbin/hotplug) to load modules and set up software needed
to use devices as you hotplug them.
source "drivers/pcmcia/Kconfig"
source "drivers/parport/Kconfig"
config PPC601_SYNC_FIX
bool "Workarounds for PPC601 bugs"
depends on 6xx && !POWER3
help
Some versions of the PPC601 (the first PowerPC chip) have bugs which
mean that extra synchronization instructions are required near
certain instructions, typically those that make major changes to the
CPU state. These extra instructions reduce performance slightly.
If you say N here, these extra instructions will not be included,
resulting in a kernel which will run faster but may not run at all
on some systems with the PPC601 chip.
If in doubt, say Y here.
config PROC_DEVICETREE
bool "Support for Open Firmware device tree in /proc"
depends on PPC_OF && PROC_FS
help
This option adds a device-tree directory under /proc which contains
an image of the device tree that the kernel copies from Open
Firmware. If unsure, say Y here.
This option adds a device-tree directory under /proc which contains
an image of the device tree that the kernel copies from Open
Firmware. If unsure, say Y here.
config PPC_RTAS
bool "Support for RTAS (RunTime Abstraction Services) in /proc"
......@@ -878,10 +788,6 @@ config PROC_PREPRESIDUAL
(lsresidual) to parse it. If you aren't on a PReP system, you don't
want this.
config PPCBUG_NVRAM
bool "Enable reading PPCBUG NVRAM during boot" if PPLUS || LOPEC
default y if PPC_PREP
config CMDLINE_BOOL
bool "Default bootloader kernel arguments"
......@@ -1032,6 +938,87 @@ source "drivers/zorro/Kconfig"
endmenu
menu "Bus options"
config ISA
bool "Support for ISA-bus hardware"
depends on PPC_PREP || PPC_CHRP
help
Find out whether you have ISA slots on your motherboard. ISA is the
name of a bus system, i.e. the way the CPU talks to the other stuff
inside your box. If you have an Apple machine, say N here; if you
have an IBM RS/6000 or pSeries machine or a PReP machine, say Y. If
you have an embedded board, consult your board documentation.
config GENERIC_ISA_DMA
bool
depends on POWER3 || 6xx && !8260
default y
config EISA
bool
help
The Extended Industry Standard Architecture (EISA) bus is a bus
architecture used on some older intel-based PCs.
config SBUS
bool
# Yes MCA RS/6000s exist but Linux-PPC does not currently support any
config MCA
bool
config PCI
bool "PCI support" if 40x || 8260
default y if !40x && !8260 && !8xx && !APUS
default PCI_PERMEDIA if !4xx && !8260 && !8xx && APUS
default PCI_QSPAN if !4xx && !8260 && 8xx
help
Find out whether your system includes a PCI bus. PCI is the name of
a bus system, i.e. the way the CPU talks to the other stuff inside
your box. If you say Y here, the kernel will include drivers and
infrastructure code to support PCI bus devices.
config PCI_DOMAINS
bool
default PCI
config PCI_QSPAN
bool "QSpan PCI"
depends on !4xx && !8260 && 8xx
help
Say Y here if you have a system based on a Motorola 8xx-series
embedded processor with a QSPAN PCI interface, otherwise say N.
config PCI_PERMEDIA
bool "PCI for Permedia2"
depends on !4xx && !8xx && APUS
source "drivers/pci/Kconfig"
config HOTPLUG
bool "Support for hot-pluggable devices"
---help---
Say Y here if you want to plug devices into your computer while
the system is running, and be able to use them quickly. In many
cases, the devices can likewise be unplugged at any time too.
One well known example of this is PCMCIA- or PC-cards, credit-card
size devices such as network cards, modems or hard drives which are
plugged into slots found on all modern laptop computers. Another
example, used on modern desktops as well as laptops, is USB.
Enable HOTPLUG and KMOD, and build a modular kernel. Get agent
software (at <http://linux-hotplug.sourceforge.net/>) and install it.
Then your kernel will automatically call out to a user mode "policy
agent" (/sbin/hotplug) to load modules and set up software needed
to use devices as you hotplug them.
source "drivers/pcmcia/Kconfig"
source "drivers/parport/Kconfig"
endmenu
menu "Advanced setup"
......
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