xref: /openbmc/linux/arch/nios2/Kconfig (revision 4949009e) 
1config NIOS2
2	def_bool y
3	select ARCH_WANT_OPTIONAL_GPIOLIB
4	select CLKSRC_OF
5	select GENERIC_ATOMIC64
6	select GENERIC_CLOCKEVENTS
7	select GENERIC_CPU_DEVICES
8	select GENERIC_IRQ_PROBE
9	select GENERIC_IRQ_SHOW
10	select HAVE_ARCH_TRACEHOOK
11	select IRQ_DOMAIN
12	select MODULES_USE_ELF_RELA
13	select OF
14	select OF_EARLY_FLATTREE
15	select SOC_BUS
16	select SPARSE_IRQ
17	select USB_ARCH_HAS_HCD if USB_SUPPORT
18
19config GENERIC_CSUM
20	def_bool y
21
22config GENERIC_HWEIGHT
23	def_bool y
24
25config GENERIC_CALIBRATE_DELAY
26	def_bool y
27
28config NO_IOPORT_MAP
29	def_bool y
30
31config HAS_DMA
32	def_bool y
33
34config FPU
35	def_bool n
36
37config SWAP
38	def_bool n
39
40config RWSEM_GENERIC_SPINLOCK
41	def_bool y
42
43config TRACE_IRQFLAGS_SUPPORT
44	def_bool n
45
46source "init/Kconfig"
47
48menu "Kernel features"
49
50source "kernel/Kconfig.preempt"
51
52source "kernel/Kconfig.freezer"
53
54source "kernel/Kconfig.hz"
55
56source "mm/Kconfig"
57
58config FORCE_MAX_ZONEORDER
59	int "Maximum zone order"
60	range 9 20
61	default "11"
62	help
63	  The kernel memory allocator divides physically contiguous memory
64	  blocks into "zones", where each zone is a power of two number of
65	  pages.  This option selects the largest power of two that the kernel
66	  keeps in the memory allocator.  If you need to allocate very large
67	  blocks of physically contiguous memory, then you may need to
68	  increase this value.
69
70	  This config option is actually maximum order plus one. For example,
71	  a value of 11 means that the largest free memory block is 2^10 pages.
72
73endmenu
74
75source "arch/nios2/platform/Kconfig.platform"
76
77menu "Processor type and features"
78
79config MMU
80	def_bool y
81
82config NR_CPUS
83	int
84	default "1"
85
86config NIOS2_ALIGNMENT_TRAP
87	bool "Catch alignment trap"
88	default y
89	help
90	  Nios II CPUs cannot fetch/store data which is not bus aligned,
91	  i.e., a 2 or 4 byte fetch must start at an address divisible by
92	  2 or 4. Any non-aligned load/store instructions will be trapped and
93	  emulated in software if you say Y here, which has a performance
94	  impact.
95
96comment "Boot options"
97
98config CMDLINE_BOOL
99	bool "Default bootloader kernel arguments"
100	default y
101
102config CMDLINE
103	string "Default kernel command string"
104	default ""
105	depends on CMDLINE_BOOL
106	help
107	  On some platforms, there is currently no way for the boot loader to
108	  pass arguments to the kernel. For these platforms, you can supply
109	  some command-line options at build time by entering them here.  In
110	  other cases you can specify kernel args so that you don't have
111	  to set them up in board prom initialization routines.
112
113config CMDLINE_FORCE
114	bool "Force default kernel command string"
115	depends on CMDLINE_BOOL
116	help
117	  Set this to have arguments from the default kernel command string
118	  override those passed by the boot loader.
119
120config NIOS2_CMDLINE_IGNORE_DTB
121	bool "Ignore kernel command string from DTB"
122	depends on CMDLINE_BOOL
123	depends on !CMDLINE_FORCE
124	default y
125	help
126	  Set this to ignore the bootargs property from the devicetree's
127	  chosen node and fall back to CMDLINE if nothing is passed.
128
129config NIOS2_PASS_CMDLINE
130	bool "Passed kernel command line from u-boot"
131	default n
132	help
133	  Use bootargs env variable from u-boot for kernel command line.
134	  will override "Default kernel command string".
135	  Say N if you are unsure.
136
137endmenu
138
139menu "Advanced setup"
140
141config ADVANCED_OPTIONS
142	bool "Prompt for advanced kernel configuration options"
143	help
144
145comment "Default settings for advanced configuration options are used"
146	depends on !ADVANCED_OPTIONS
147
148config NIOS2_KERNEL_MMU_REGION_BASE_BOOL
149	bool "Set custom kernel MMU region base address"
150	depends on ADVANCED_OPTIONS
151	help
152	  This option allows you to set the virtual address of the kernel MMU region.
153
154	  Say N here unless you know what you are doing.
155
156config NIOS2_KERNEL_MMU_REGION_BASE
157	hex "Virtual base address of the kernel MMU region " if NIOS2_KERNEL_MMU_REGION_BASE_BOOL
158	default "0x80000000"
159	help
160	  This option allows you to set the virtual base address of the kernel MMU region.
161
162config NIOS2_KERNEL_REGION_BASE_BOOL
163	bool "Set custom kernel region base address"
164	depends on ADVANCED_OPTIONS
165	help
166	  This option allows you to set the virtual address of the kernel region.
167
168	  Say N here unless you know what you are doing.
169
170config NIOS2_KERNEL_REGION_BASE
171	hex "Virtual base address of the kernel region " if NIOS2_KERNEL_REGION_BASE_BOOL
172	default "0xc0000000"
173
174config NIOS2_IO_REGION_BASE_BOOL
175	bool "Set custom I/O region base address"
176	depends on ADVANCED_OPTIONS
177	help
178	  This option allows you to set the virtual address of the I/O region.
179
180	  Say N here unless you know what you are doing.
181
182config NIOS2_IO_REGION_BASE
183	hex "Virtual base address of the I/O region" if NIOS2_IO_REGION_BASE_BOOL
184	default "0xe0000000"
185
186endmenu
187
188menu "Executable file formats"
189
190source "fs/Kconfig.binfmt"
191
192endmenu
193
194source "net/Kconfig"
195
196source "drivers/Kconfig"
197
198source "fs/Kconfig"
199
200source "arch/nios2/Kconfig.debug"
201
202source "security/Kconfig"
203
204source "crypto/Kconfig"
205
206source "lib/Kconfig"
207