xref: /openbmc/linux/arch/microblaze/Kconfig (revision 842ed298)
1# SPDX-License-Identifier: GPL-2.0-only
2config MICROBLAZE
3	def_bool y
4	select ARCH_32BIT_OFF_T
5	select ARCH_NO_SWAP
6	select ARCH_HAS_DMA_PREP_COHERENT
7	select ARCH_HAS_GCOV_PROFILE_ALL
8	select ARCH_HAS_SYNC_DMA_FOR_CPU
9	select ARCH_HAS_SYNC_DMA_FOR_DEVICE
10	select ARCH_MIGHT_HAVE_PC_PARPORT
11	select ARCH_WANT_IPC_PARSE_VERSION
12	select BUILDTIME_TABLE_SORT
13	select TIMER_OF
14	select CLONE_BACKWARDS3
15	select COMMON_CLK
16	select DMA_DIRECT_REMAP
17	select GENERIC_ATOMIC64
18	select GENERIC_CPU_DEVICES
19	select GENERIC_IDLE_POLL_SETUP
20	select GENERIC_IRQ_PROBE
21	select GENERIC_IRQ_SHOW
22	select GENERIC_PCI_IOMAP
23	select GENERIC_SCHED_CLOCK
24	select HAVE_ARCH_HASH
25	select HAVE_ARCH_KGDB
26	select HAVE_ARCH_SECCOMP
27	select HAVE_DEBUG_KMEMLEAK
28	select HAVE_DMA_CONTIGUOUS
29	select HAVE_DYNAMIC_FTRACE
30	select HAVE_FTRACE_MCOUNT_RECORD
31	select HAVE_FUNCTION_GRAPH_TRACER
32	select HAVE_FUNCTION_TRACER
33	select HAVE_OPROFILE
34	select HAVE_PCI
35	select IRQ_DOMAIN
36	select XILINX_INTC
37	select MODULES_USE_ELF_RELA
38	select OF
39	select OF_EARLY_FLATTREE
40	select PCI_DOMAINS_GENERIC if PCI
41	select PCI_SYSCALL if PCI
42	select TRACING_SUPPORT
43	select VIRT_TO_BUS
44	select CPU_NO_EFFICIENT_FFS
45	select MMU_GATHER_NO_RANGE
46	select SPARSE_IRQ
47	select SET_FS
48
49# Endianness selection
50choice
51	prompt "Endianness selection"
52	default CPU_LITTLE_ENDIAN
53	help
54	  microblaze architectures can be configured for either little or
55	  big endian formats. Be sure to select the appropriate mode.
56
57config CPU_BIG_ENDIAN
58	bool "Big endian"
59
60config CPU_LITTLE_ENDIAN
61	bool "Little endian"
62
63endchoice
64
65config ZONE_DMA
66	def_bool y
67
68config ARCH_HAS_ILOG2_U32
69	def_bool n
70
71config ARCH_HAS_ILOG2_U64
72	def_bool n
73
74config GENERIC_HWEIGHT
75	def_bool y
76
77config GENERIC_CALIBRATE_DELAY
78	def_bool y
79
80config GENERIC_CSUM
81	def_bool y
82
83config STACKTRACE_SUPPORT
84	def_bool y
85
86config LOCKDEP_SUPPORT
87	def_bool y
88
89source "arch/microblaze/Kconfig.platform"
90
91menu "Processor type and features"
92
93source "kernel/Kconfig.hz"
94
95config MMU
96	def_bool y
97
98comment "Boot options"
99
100config CMDLINE_BOOL
101	bool "Default bootloader kernel arguments"
102
103config CMDLINE
104	string "Default kernel command string"
105	depends on CMDLINE_BOOL
106	default "console=ttyUL0,115200"
107	help
108	  On some architectures there is currently no way for the boot loader
109	  to pass arguments to the kernel. For these architectures, you should
110	  supply some command-line options at build time by entering them
111	  here.
112
113config CMDLINE_FORCE
114	bool "Force default kernel command string"
115	depends on CMDLINE_BOOL
116	default n
117	help
118	  Set this to have arguments from the default kernel command string
119	  override those passed by the boot loader.
120
121endmenu
122
123menu "Kernel features"
124
125config NR_CPUS
126	int
127	default "1"
128
129config ADVANCED_OPTIONS
130	bool "Prompt for advanced kernel configuration options"
131	help
132	  This option will enable prompting for a variety of advanced kernel
133	  configuration options.  These options can cause the kernel to not
134	  work if they are set incorrectly, but can be used to optimize certain
135	  aspects of kernel memory management.
136
137	  Unless you know what you are doing, say N here.
138
139comment "Default settings for advanced configuration options are used"
140	depends on !ADVANCED_OPTIONS
141
142config HIGHMEM
143	bool "High memory support"
144	select KMAP_LOCAL
145	help
146	  The address space of Microblaze processors is only 4 Gigabytes large
147	  and it has to accommodate user address space, kernel address
148	  space as well as some memory mapped IO. That means that, if you
149	  have a large amount of physical memory and/or IO, not all of the
150	  memory can be "permanently mapped" by the kernel. The physical
151	  memory that is not permanently mapped is called "high memory".
152
153	  If unsure, say n.
154
155config LOWMEM_SIZE_BOOL
156	bool "Set maximum low memory"
157	depends on ADVANCED_OPTIONS
158	help
159	  This option allows you to set the maximum amount of memory which
160	  will be used as "low memory", that is, memory which the kernel can
161	  access directly, without having to set up a kernel virtual mapping.
162	  This can be useful in optimizing the layout of kernel virtual
163	  memory.
164
165	  Say N here unless you know what you are doing.
166
167config LOWMEM_SIZE
168	hex "Maximum low memory size (in bytes)" if LOWMEM_SIZE_BOOL
169	default "0x30000000"
170
171config MANUAL_RESET_VECTOR
172	hex "Microblaze reset vector address setup"
173	default "0x0"
174	help
175	  Set this option to have the kernel override the CPU Reset vector.
176	  If zero, no change will be made to the MicroBlaze reset vector at
177	  address 0x0.
178	  If non-zero, a jump instruction to this address, will be written
179	  to the reset vector at address 0x0.
180	  If you are unsure, set it to default value 0x0.
181
182config KERNEL_START_BOOL
183	bool "Set custom kernel base address"
184	depends on ADVANCED_OPTIONS
185	help
186	  This option allows you to set the kernel virtual address at which
187	  the kernel will map low memory (the kernel image will be linked at
188	  this address).  This can be useful in optimizing the virtual memory
189	  layout of the system.
190
191	  Say N here unless you know what you are doing.
192
193config KERNEL_START
194	hex "Virtual address of kernel base" if KERNEL_START_BOOL
195	default "0xc0000000"
196
197config TASK_SIZE_BOOL
198	bool "Set custom user task size"
199	depends on ADVANCED_OPTIONS
200	help
201	  This option allows you to set the amount of virtual address space
202	  allocated to user tasks.  This can be useful in optimizing the
203	  virtual memory layout of the system.
204
205	  Say N here unless you know what you are doing.
206
207config TASK_SIZE
208	hex "Size of user task space" if TASK_SIZE_BOOL
209	default "0x80000000"
210
211endmenu
212
213menu "Bus Options"
214
215config PCI_XILINX
216	bool "Xilinx PCI host bridge support"
217	depends on PCI
218
219endmenu
220