linux/arch/arm/Kconfig-nommu
Jonathan Austin de8297765d ARM: mpu: Ensure that MPU depends on CPU_V7
The support for the MPU is currently implemented only for R-class
(PMSAv7/R). Since the merge of V7M support in to the kernel it is possible
to select MPU support on V7M.

This patch ensures that until MPU support for M-class processors is
implemented, the MPU can only be selected with R-class CPUs

Signed-off-by: Jonathan Austin <jonathan.austin@arm.com>
Acked-by: Uwe Kleine-König <u.kleine-koenig@pengutronix.de>
2013-06-17 15:13:18 +01:00

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#
# Kconfig for uClinux(non-paged MM) depend configurations
# Hyok S. Choi <hyok.choi@samsung.com>
#
config SET_MEM_PARAM
bool "Set flash/sdram size and base addr"
help
Say Y to manually set the base addresses and sizes.
otherwise, the default values are assigned.
config DRAM_BASE
hex '(S)DRAM Base Address' if SET_MEM_PARAM
default 0x00800000
config DRAM_SIZE
hex '(S)DRAM SIZE' if SET_MEM_PARAM
default 0x00800000
config FLASH_MEM_BASE
hex 'FLASH Base Address' if SET_MEM_PARAM
default 0x00400000
config FLASH_SIZE
hex 'FLASH Size' if SET_MEM_PARAM
default 0x00400000
config PROCESSOR_ID
hex 'Hard wire the processor ID'
default 0x00007700
depends on !(CPU_CP15 || CPU_V7M)
help
If processor has no CP15 register, this processor ID is
used instead of the auto-probing which utilizes the register.
config REMAP_VECTORS_TO_RAM
bool 'Install vectors to the beginning of RAM' if DRAM_BASE
depends on DRAM_BASE
help
The kernel needs to change the hardware exception vectors.
In nommu mode, the hardware exception vectors are normally
placed at address 0x00000000. However, this region may be
occupied by read-only memory depending on H/W design.
If the region contains read-write memory, say 'n' here.
If your CPU provides a remap facility which allows the exception
vectors to be mapped to writable memory, say 'n' here.
Otherwise, say 'y' here. In this case, the kernel will require
external support to redirect the hardware exception vectors to
the writable versions located at DRAM_BASE.
config ARM_MPU
bool 'Use the ARM v7 PMSA Compliant MPU'
depends on CPU_V7
default y
help
Some ARM systems without an MMU have instead a Memory Protection
Unit (MPU) that defines the type and permissions for regions of
memory.
If your CPU has an MPU then you should choose 'y' here unless you
know that you do not want to use the MPU.