xref: /openbmc/linux/arch/nios2/Kconfig (revision 4da722ca) 
1config NIOS2
2	def_bool y
3	select TIMER_OF
4	select GENERIC_ATOMIC64
5	select GENERIC_CLOCKEVENTS
6	select GENERIC_CPU_DEVICES
7	select GENERIC_IRQ_PROBE
8	select GENERIC_IRQ_SHOW
9	select GENERIC_STRNCPY_FROM_USER
10	select GENERIC_STRNLEN_USER
11	select HAVE_ARCH_TRACEHOOK
12	select HAVE_ARCH_KGDB
13	select IRQ_DOMAIN
14	select MODULES_USE_ELF_RELA
15	select OF
16	select OF_EARLY_FLATTREE
17	select SOC_BUS
18	select SPARSE_IRQ
19	select USB_ARCH_HAS_HCD if USB_SUPPORT
20	select CPU_NO_EFFICIENT_FFS
21
22config GENERIC_CSUM
23	def_bool y
24
25config GENERIC_HWEIGHT
26	def_bool y
27
28config GENERIC_CALIBRATE_DELAY
29	def_bool y
30
31config NO_IOPORT_MAP
32	def_bool y
33
34config HAS_DMA
35	def_bool y
36
37config FPU
38	def_bool n
39
40config SWAP
41	def_bool n
42
43config RWSEM_GENERIC_SPINLOCK
44	def_bool y
45
46config TRACE_IRQFLAGS_SUPPORT
47	def_bool n
48
49source "init/Kconfig"
50
51menu "Kernel features"
52
53source "kernel/Kconfig.preempt"
54
55source "kernel/Kconfig.freezer"
56
57source "kernel/Kconfig.hz"
58
59source "mm/Kconfig"
60
61config FORCE_MAX_ZONEORDER
62	int "Maximum zone order"
63	range 9 20
64	default "11"
65	help
66	  The kernel memory allocator divides physically contiguous memory
67	  blocks into "zones", where each zone is a power of two number of
68	  pages.  This option selects the largest power of two that the kernel
69	  keeps in the memory allocator.  If you need to allocate very large
70	  blocks of physically contiguous memory, then you may need to
71	  increase this value.
72
73	  This config option is actually maximum order plus one. For example,
74	  a value of 11 means that the largest free memory block is 2^10 pages.
75
76endmenu
77
78source "arch/nios2/platform/Kconfig.platform"
79
80menu "Processor type and features"
81
82config MMU
83	def_bool y
84
85config NR_CPUS
86	int
87	default "1"
88
89config NIOS2_ALIGNMENT_TRAP
90	bool "Catch alignment trap"
91	default y
92	help
93	  Nios II CPUs cannot fetch/store data which is not bus aligned,
94	  i.e., a 2 or 4 byte fetch must start at an address divisible by
95	  2 or 4. Any non-aligned load/store instructions will be trapped and
96	  emulated in software if you say Y here, which has a performance
97	  impact.
98
99comment "Boot options"
100
101config CMDLINE_BOOL
102	bool "Default bootloader kernel arguments"
103	default y
104
105config CMDLINE
106	string "Default kernel command string"
107	default ""
108	depends on CMDLINE_BOOL
109	help
110	  On some platforms, there is currently no way for the boot loader to
111	  pass arguments to the kernel. For these platforms, you can supply
112	  some command-line options at build time by entering them here.  In
113	  other cases you can specify kernel args so that you don't have
114	  to set them up in board prom initialization routines.
115
116config CMDLINE_FORCE
117	bool "Force default kernel command string"
118	depends on CMDLINE_BOOL
119	help
120	  Set this to have arguments from the default kernel command string
121	  override those passed by the boot loader.
122
123config NIOS2_CMDLINE_IGNORE_DTB
124	bool "Ignore kernel command string from DTB"
125	depends on CMDLINE_BOOL
126	depends on !CMDLINE_FORCE
127	default y
128	help
129	  Set this to ignore the bootargs property from the devicetree's
130	  chosen node and fall back to CMDLINE if nothing is passed.
131
132config NIOS2_PASS_CMDLINE
133	bool "Passed kernel command line from u-boot"
134	default n
135	help
136	  Use bootargs env variable from u-boot for kernel command line.
137	  will override "Default kernel command string".
138	  Say N if you are unsure.
139
140config NIOS2_BOOT_LINK_OFFSET
141	hex "Link address offset for booting"
142	default "0x00500000"
143	help
144	  This option allows you to set the link address offset of the zImage.
145	  This can be useful if you are on a board which has a small amount of
146	  memory.
147
148endmenu
149
150menu "Advanced setup"
151
152config ADVANCED_OPTIONS
153	bool "Prompt for advanced kernel configuration options"
154	help
155
156comment "Default settings for advanced configuration options are used"
157	depends on !ADVANCED_OPTIONS
158
159config NIOS2_KERNEL_MMU_REGION_BASE_BOOL
160	bool "Set custom kernel MMU region base address"
161	depends on ADVANCED_OPTIONS
162	help
163	  This option allows you to set the virtual address of the kernel MMU region.
164
165	  Say N here unless you know what you are doing.
166
167config NIOS2_KERNEL_MMU_REGION_BASE
168	hex "Virtual base address of the kernel MMU region " if NIOS2_KERNEL_MMU_REGION_BASE_BOOL
169	default "0x80000000"
170	help
171	  This option allows you to set the virtual base address of the kernel MMU region.
172
173config NIOS2_KERNEL_REGION_BASE_BOOL
174	bool "Set custom kernel region base address"
175	depends on ADVANCED_OPTIONS
176	help
177	  This option allows you to set the virtual address of the kernel region.
178
179	  Say N here unless you know what you are doing.
180
181config NIOS2_KERNEL_REGION_BASE
182	hex "Virtual base address of the kernel region " if NIOS2_KERNEL_REGION_BASE_BOOL
183	default "0xc0000000"
184
185config NIOS2_IO_REGION_BASE_BOOL
186	bool "Set custom I/O region base address"
187	depends on ADVANCED_OPTIONS
188	help
189	  This option allows you to set the virtual address of the I/O region.
190
191	  Say N here unless you know what you are doing.
192
193config NIOS2_IO_REGION_BASE
194	hex "Virtual base address of the I/O region" if NIOS2_IO_REGION_BASE_BOOL
195	default "0xe0000000"
196
197endmenu
198
199menu "Executable file formats"
200
201source "fs/Kconfig.binfmt"
202
203endmenu
204
205source "net/Kconfig"
206
207source "drivers/Kconfig"
208
209source "fs/Kconfig"
210
211source "arch/nios2/Kconfig.debug"
212
213source "security/Kconfig"
214
215source "crypto/Kconfig"
216
217source "lib/Kconfig"
218