linux/arch/m68k/Kconfig
Greg Ungerer e08d703cc2 m68k: modify user space access functions to support ColdFire CPUs
Modify the user space access functions to support the ColdFire V4e cores
running with MMU enabled.

The ColdFire processors do not support the "moves" instruction used by
the traditional 680x0 processors for moving data into and out of another
address space. They only support the notion of a single address space,
and you use the usual "move" instruction to access that.

Create a new config symbol (CONFIG_CPU_HAS_ADDRESS_SPACES) to mark the
CPU types that support separate address spaces, and thus also support
the sfc/dfc registers and the "moves" instruction that go along with that.

The code is almost identical for user space access, so lets just use a
define to choose either the "move" or "moves" in the assembler code.

Signed-off-by: Greg Ungerer <gerg@uclinux.org>
Acked-by: Matt Waddel <mwaddel@yahoo.com>
Acked-by: Kurt Mahan <kmahan@xmission.com>
Acked-by: Geert Uytterhoeven <geert@linux-m68k.org>
2011-12-30 10:20:21 +10:00

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config M68K
bool
default y
select HAVE_IDE
select HAVE_AOUT if MMU
select HAVE_GENERIC_HARDIRQS
select GENERIC_IRQ_SHOW
select ARCH_HAVE_NMI_SAFE_CMPXCHG if RMW_INSNS
config RWSEM_GENERIC_SPINLOCK
bool
default y
config RWSEM_XCHGADD_ALGORITHM
bool
config ARCH_HAS_ILOG2_U32
bool
config ARCH_HAS_ILOG2_U64
bool
config GENERIC_CLOCKEVENTS
bool
config GENERIC_CMOS_UPDATE
def_bool !MMU
config GENERIC_GPIO
bool
config GENERIC_HWEIGHT
bool
default y
config GENERIC_CALIBRATE_DELAY
bool
default y
config GENERIC_IOMAP
def_bool MMU
config GENERIC_CSUM
bool
config TIME_LOW_RES
bool
default y
config ARCH_USES_GETTIMEOFFSET
def_bool MMU
config NO_IOPORT
def_bool y
config NO_DMA
def_bool (MMU && SUN3) || (!MMU && !COLDFIRE)
config ZONE_DMA
bool
default y
config CPU_HAS_NO_BITFIELDS
bool
config CPU_HAS_NO_MULDIV64
bool
config CPU_HAS_ADDRESS_SPACES
bool
config HZ
int
default 1000 if CLEOPATRA
default 100
source "init/Kconfig"
source "kernel/Kconfig.freezer"
config MMU
bool "MMU-based Paged Memory Management Support"
default y
help
Select if you want MMU-based virtualised addressing space
support by paged memory management. If unsure, say 'Y'.
config MMU_MOTOROLA
bool
config MMU_SUN3
bool
depends on MMU && !MMU_MOTOROLA
menu "Platform setup"
source arch/m68k/Kconfig.cpu
source arch/m68k/Kconfig.machine
source arch/m68k/Kconfig.bus
endmenu
menu "Kernel Features"
if COLDFIRE
source "kernel/Kconfig.preempt"
endif
if !MMU || COLDFIRE
source "kernel/time/Kconfig"
endif
source "mm/Kconfig"
endmenu
menu "Executable file formats"
source "fs/Kconfig.binfmt"
endmenu
if !MMU
menu "Power management options"
config PM
bool "Power Management support"
help
Support processor power management modes
endmenu
endif
source "net/Kconfig"
source "drivers/Kconfig"
source "arch/m68k/Kconfig.devices"
source "fs/Kconfig"
source "arch/m68k/Kconfig.debug"
source "security/Kconfig"
source "crypto/Kconfig"
source "lib/Kconfig"