arch/arm/Kconfig-nommu

   1 # SPDX-License-Identifier: GPL-2.0
   2 #
   3 # Kconfig for uClinux(non-paged MM) depend configurations
   4 # Hyok S. Choi <hyok.choi@samsung.com>
   5 #
   6
   7 config SET_MEM_PARAM
   8         bool "Set flash/sdram size and base addr"
   9         help
  10          Say Y to manually set the base addresses and sizes.
  11          otherwise, the default values are assigned.
  12
  13 config DRAM_BASE
  14         hex '(S)DRAM Base Address' if SET_MEM_PARAM
  15         default 0x00800000
  16
  17 config DRAM_SIZE
  18         hex '(S)DRAM SIZE' if SET_MEM_PARAM
  19         default 0x00800000
  20
  21 config FLASH_MEM_BASE
  22         hex 'FLASH Base Address' if SET_MEM_PARAM
  23         depends on CPU_ARM740T || CPU_ARM946E || CPU_ARM940T
  24         default 0x00400000
  25
  26 config FLASH_SIZE
  27         hex 'FLASH Size' if SET_MEM_PARAM
  28         depends on CPU_ARM740T || CPU_ARM946E || CPU_ARM940T
  29         default 0x00400000
  30
  31 config PROCESSOR_ID
  32         hex 'Hard wire the processor ID'
  33         default 0x00007700
  34         depends on !(CPU_CP15 || CPU_V7M)
  35         help
  36           If processor has no CP15 register, this processor ID is
  37           used instead of the auto-probing which utilizes the register.
  38
  39 config REMAP_VECTORS_TO_RAM
  40         bool 'Install vectors to the beginning of RAM'
  41         help
  42           The kernel needs to change the hardware exception vectors.
  43           In nommu mode, the hardware exception vectors are normally
  44           placed at address 0x00000000. However, this region may be
  45           occupied by read-only memory depending on H/W design.
  46
  47           If the region contains read-write memory, say 'n' here.
  48
  49           If your CPU provides a remap facility which allows the exception
  50           vectors to be mapped to writable memory, say 'n' here.
  51
  52           Otherwise, say 'y' here.  In this case, the kernel will require
  53           external support to redirect the hardware exception vectors to
  54           the writable versions located at DRAM_BASE.
  55
  56 config ARM_MPU
  57        bool 'Use the ARM v7 PMSA Compliant MPU'
  58        depends on CPU_V7 || CPU_V7M
  59        default y if CPU_V7
  60        help
  61          Some ARM systems without an MMU have instead a Memory Protection
  62          Unit (MPU) that defines the type and permissions for regions of
  63          memory.
  64
  65          If your CPU has an MPU then you should choose 'y' here unless you
  66          know that you do not want to use the MPU.