xref: /linux/arch/arm/Kconfig-nommu (revision e9f0878c4b2004ac19581274c1ae4c61ae3ca70e)
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
7config 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
13config DRAM_BASE
14	hex '(S)DRAM Base Address' if SET_MEM_PARAM
15	default 0x00800000
16
17config DRAM_SIZE
18	hex '(S)DRAM SIZE' if SET_MEM_PARAM
19	default 0x00800000
20
21config FLASH_MEM_BASE
22	hex 'FLASH Base Address' if SET_MEM_PARAM
23	default 0x00400000
24
25config FLASH_SIZE
26	hex 'FLASH Size' if SET_MEM_PARAM
27	default 0x00400000
28
29config PROCESSOR_ID
30	hex 'Hard wire the processor ID'
31	default 0x00007700
32	depends on !(CPU_CP15 || CPU_V7M)
33	help
34	  If processor has no CP15 register, this processor ID is
35	  used instead of the auto-probing which utilizes the register.
36
37config REMAP_VECTORS_TO_RAM
38	bool 'Install vectors to the beginning of RAM'
39	help
40	  The kernel needs to change the hardware exception vectors.
41	  In nommu mode, the hardware exception vectors are normally
42	  placed at address 0x00000000. However, this region may be
43	  occupied by read-only memory depending on H/W design.
44
45	  If the region contains read-write memory, say 'n' here.
46
47	  If your CPU provides a remap facility which allows the exception
48	  vectors to be mapped to writable memory, say 'n' here.
49
50	  Otherwise, say 'y' here.  In this case, the kernel will require
51	  external support to redirect the hardware exception vectors to
52	  the writable versions located at DRAM_BASE.
53
54config ARM_MPU
55       bool 'Use the ARM v7 PMSA Compliant MPU'
56       depends on CPU_V7 || CPU_V7M
57       default y if CPU_V7
58       help
59         Some ARM systems without an MMU have instead a Memory Protection
60         Unit (MPU) that defines the type and permissions for regions of
61         memory.
62
63         If your CPU has an MPU then you should choose 'y' here unless you
64         know that you do not want to use the MPU.
65