1 # SPDX-License-Identifier: GPL-2.0
2 config NIOS2
3 def_bool y
4 select ARCH_32BIT_OFF_T
5 select ARCH_HAS_CPU_CACHE_ALIASING
6 select ARCH_HAS_DMA_PREP_COHERENT
7 select ARCH_HAS_SYNC_DMA_FOR_CPU
8 select ARCH_HAS_SYNC_DMA_FOR_DEVICE
9 select ARCH_HAS_DMA_SET_UNCACHED
10 select ARCH_NO_SWAP
11 select COMMON_CLK
12 select TIMER_OF
13 select GENERIC_ATOMIC64
14 select GENERIC_CPU_DEVICES
15 select GENERIC_IRQ_PROBE
16 select GENERIC_IRQ_SHOW
17 select HAVE_ARCH_TRACEHOOK
18 select HAVE_ARCH_KGDB
19 select HAVE_PAGE_SIZE_4KB
20 select IRQ_DOMAIN
21 select LOCK_MM_AND_FIND_VMA
22 select MODULES_USE_ELF_RELA
23 select OF
24 select OF_EARLY_FLATTREE
25 select SOC_BUS
26 select SPARSE_IRQ
27 select USB_ARCH_HAS_HCD if USB_SUPPORT
28 select CPU_NO_EFFICIENT_FFS
29 select MMU_GATHER_NO_RANGE if MMU
30
31 config GENERIC_CSUM
32 def_bool y
33
34 config GENERIC_HWEIGHT
35 def_bool y
36
37 config GENERIC_CALIBRATE_DELAY
38 def_bool y
39
40 config NO_IOPORT_MAP
41 def_bool y
42
43 config FPU
44 def_bool n
45
46 menu "Kernel features"
47
48 source "kernel/Kconfig.hz"
49
50 config ARCH_FORCE_MAX_ORDER
51 int "Order of maximal physically conti
52 default "10"
53 help
54 The kernel page allocator limits the
55 contiguous allocations. The limit is
56 defines the maximal power of two of
57 allocated as a single contiguous blo
58 overriding the default setting when
59 large blocks of physically contiguou
60
61 Don't change if unsure.
62
63 endmenu
64
65 source "arch/nios2/platform/Kconfig.platform"
66
67 menu "Processor type and features"
68
69 config MMU
70 def_bool y
71
72 config NR_CPUS
73 int
74 default "1"
75
76 config NIOS2_ALIGNMENT_TRAP
77 bool "Catch alignment trap"
78 default y
79 help
80 Nios II CPUs cannot fetch/store data
81 i.e., a 2 or 4 byte fetch must start
82 2 or 4. Any non-aligned load/store i
83 emulated in software if you say Y he
84 impact.
85
86 comment "Boot options"
87
88 config CMDLINE_BOOL
89 bool "Default bootloader kernel argume
90 default y
91
92 config CMDLINE
93 string "Default kernel command string"
94 default ""
95 depends on CMDLINE_BOOL
96 help
97 On some platforms, there is currentl
98 pass arguments to the kernel. For th
99 some command-line options at build t
100 other cases you can specify kernel a
101 to set them up in board prom initial
102
103 config CMDLINE_FORCE
104 bool "Force default kernel command str
105 depends on CMDLINE_BOOL
106 help
107 Set this to have arguments from the
108 override those passed by the boot lo
109
110 config NIOS2_CMDLINE_IGNORE_DTB
111 bool "Ignore kernel command string fro
112 depends on CMDLINE_BOOL
113 depends on !CMDLINE_FORCE
114 default y
115 help
116 Set this to ignore the bootargs prop
117 chosen node and fall back to CMDLINE
118
119 config NIOS2_PASS_CMDLINE
120 bool "Passed kernel command line from
121 help
122 Use bootargs env variable from u-boo
123 will override "Default kernel comman
124 Say N if you are unsure.
125
126 config NIOS2_BOOT_LINK_OFFSET
127 hex "Link address offset for booting"
128 default "0x00500000"
129 help
130 This option allows you to set the li
131 This can be useful if you are on a b
132 memory.
133
134 endmenu
135
136 menu "Advanced setup"
137
138 config ADVANCED_OPTIONS
139 bool "Prompt for advanced kernel confi
140
141 comment "Default settings for advanced configu
142 depends on !ADVANCED_OPTIONS
143
144 config NIOS2_KERNEL_MMU_REGION_BASE_BOOL
145 bool "Set custom kernel MMU region bas
146 depends on ADVANCED_OPTIONS
147 help
148 This option allows you to set the vi
149
150 Say N here unless you know what you
151
152 config NIOS2_KERNEL_MMU_REGION_BASE
153 hex "Virtual base address of the kerne
154 default "0x80000000"
155 help
156 This option allows you to set the vi
157
158 config NIOS2_KERNEL_REGION_BASE_BOOL
159 bool "Set custom kernel region base ad
160 depends on ADVANCED_OPTIONS
161 help
162 This option allows you to set the vi
163
164 Say N here unless you know what you
165
166 config NIOS2_KERNEL_REGION_BASE
167 hex "Virtual base address of the kerne
168 default "0xc0000000"
169
170 config NIOS2_IO_REGION_BASE_BOOL
171 bool "Set custom I/O region base addre
172 depends on ADVANCED_OPTIONS
173 help
174 This option allows you to set the vi
175
176 Say N here unless you know what you
177
178 config NIOS2_IO_REGION_BASE
179 hex "Virtual base address of the I/O r
180 default "0xe0000000"
181
182 endmenu
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