xref: /openbmc/linux/arch/arm/Kconfig-nommu (revision 7aacf86b)
1#
2# Kconfig for uClinux(non-paged MM) depend configurations
3# Hyok S. Choi <hyok.choi@samsung.com>
4#
5
6config SET_MEM_PARAM
7	bool "Set flash/sdram size and base addr"
8	help
9	 Say Y to manually set the base addresses and sizes.
10	 otherwise, the default values are assigned.
11
12config DRAM_BASE
13	hex '(S)DRAM Base Address' if SET_MEM_PARAM
14	default 0x00800000
15
16config DRAM_SIZE
17	hex '(S)DRAM SIZE' if SET_MEM_PARAM
18	default 0x00800000
19
20config FLASH_MEM_BASE
21	hex 'FLASH Base Address' if SET_MEM_PARAM
22	default 0x00400000
23
24config FLASH_SIZE
25	hex 'FLASH Size' if SET_MEM_PARAM
26	default 0x00400000
27
28config PROCESSOR_ID
29	hex 'Hard wire the processor ID'
30	default 0x00007700
31	depends on !(CPU_CP15 || CPU_V7M)
32	help
33	  If processor has no CP15 register, this processor ID is
34	  used instead of the auto-probing which utilizes the register.
35
36config REMAP_VECTORS_TO_RAM
37	bool 'Install vectors to the beginning of RAM'
38	help
39	  The kernel needs to change the hardware exception vectors.
40	  In nommu mode, the hardware exception vectors are normally
41	  placed at address 0x00000000. However, this region may be
42	  occupied by read-only memory depending on H/W design.
43
44	  If the region contains read-write memory, say 'n' here.
45
46	  If your CPU provides a remap facility which allows the exception
47	  vectors to be mapped to writable memory, say 'n' here.
48
49	  Otherwise, say 'y' here.  In this case, the kernel will require
50	  external support to redirect the hardware exception vectors to
51	  the writable versions located at DRAM_BASE.
52
53config ARM_MPU
54       bool 'Use the ARM v7 PMSA Compliant MPU'
55       depends on CPU_V7
56       default y
57       help
58         Some ARM systems without an MMU have instead a Memory Protection
59         Unit (MPU) that defines the type and permissions for regions of
60         memory.
61
62         If your CPU has an MPU then you should choose 'y' here unless you
63         know that you do not want to use the MPU.
64