xref: /linux/arch/microblaze/Kconfig (revision 79790b6818e96c58fe2bffee1b418c16e64e7b80)
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 HAS_IOPORT if PCI
25	select HAVE_ARCH_HASH
26	select HAVE_ARCH_KGDB
27	select HAVE_ARCH_SECCOMP
28	select HAVE_DEBUG_KMEMLEAK
29	select HAVE_DMA_CONTIGUOUS
30	select HAVE_DYNAMIC_FTRACE
31	select HAVE_FTRACE_MCOUNT_RECORD
32	select HAVE_FUNCTION_GRAPH_TRACER
33	select HAVE_FUNCTION_TRACER
34	select HAVE_PAGE_SIZE_4KB
35	select HAVE_PCI
36	select IRQ_DOMAIN
37	select XILINX_INTC
38	select MODULES_USE_ELF_RELA
39	select OF
40	select OF_EARLY_FLATTREE
41	select PCI_DOMAINS_GENERIC if PCI
42	select PCI_SYSCALL if PCI
43	select CPU_NO_EFFICIENT_FFS
44	select MMU_GATHER_NO_RANGE
45	select SPARSE_IRQ
46	select ZONE_DMA
47	select TRACE_IRQFLAGS_SUPPORT
48	select GENERIC_IRQ_MULTI_HANDLER
49
50# Endianness selection
51choice
52	prompt "Endianness selection"
53	default CPU_LITTLE_ENDIAN
54	help
55	  microblaze architectures can be configured for either little or
56	  big endian formats. Be sure to select the appropriate mode.
57
58config CPU_BIG_ENDIAN
59	bool "Big endian"
60
61config CPU_LITTLE_ENDIAN
62	bool "Little endian"
63
64endchoice
65
66config ARCH_HAS_ILOG2_U32
67	def_bool n
68
69config ARCH_HAS_ILOG2_U64
70	def_bool n
71
72config GENERIC_HWEIGHT
73	def_bool y
74
75config GENERIC_CALIBRATE_DELAY
76	def_bool y
77
78config GENERIC_CSUM
79	def_bool y
80
81config STACKTRACE_SUPPORT
82	def_bool y
83
84config LOCKDEP_SUPPORT
85	def_bool y
86
87source "arch/microblaze/Kconfig.platform"
88
89menu "Processor type and features"
90
91source "kernel/Kconfig.hz"
92
93config MMU
94	def_bool y
95
96comment "Boot options"
97
98config CMDLINE_BOOL
99	bool "Default bootloader kernel arguments"
100
101config CMDLINE
102	string "Default kernel command string"
103	depends on CMDLINE_BOOL
104	default "console=ttyUL0,115200"
105	help
106	  On some architectures there is currently no way for the boot loader
107	  to pass arguments to the kernel. For these architectures, you should
108	  supply some command-line options at build time by entering them
109	  here.
110
111config CMDLINE_FORCE
112	bool "Force default kernel command string"
113	depends on CMDLINE_BOOL
114	default n
115	help
116	  Set this to have arguments from the default kernel command string
117	  override those passed by the boot loader.
118
119endmenu
120
121menu "Kernel features"
122
123config NR_CPUS
124	int
125	default "1"
126
127config ADVANCED_OPTIONS
128	bool "Prompt for advanced kernel configuration options"
129	help
130	  This option will enable prompting for a variety of advanced kernel
131	  configuration options.  These options can cause the kernel to not
132	  work if they are set incorrectly, but can be used to optimize certain
133	  aspects of kernel memory management.
134
135	  Unless you know what you are doing, say N here.
136
137comment "Default settings for advanced configuration options are used"
138	depends on !ADVANCED_OPTIONS
139
140config HIGHMEM
141	bool "High memory support"
142	select KMAP_LOCAL
143	help
144	  The address space of Microblaze processors is only 4 Gigabytes large
145	  and it has to accommodate user address space, kernel address
146	  space as well as some memory mapped IO. That means that, if you
147	  have a large amount of physical memory and/or IO, not all of the
148	  memory can be "permanently mapped" by the kernel. The physical
149	  memory that is not permanently mapped is called "high memory".
150
151	  If unsure, say n.
152
153config LOWMEM_SIZE_BOOL
154	bool "Set maximum low memory"
155	depends on ADVANCED_OPTIONS
156	help
157	  This option allows you to set the maximum amount of memory which
158	  will be used as "low memory", that is, memory which the kernel can
159	  access directly, without having to set up a kernel virtual mapping.
160	  This can be useful in optimizing the layout of kernel virtual
161	  memory.
162
163	  Say N here unless you know what you are doing.
164
165config LOWMEM_SIZE
166	hex "Maximum low memory size (in bytes)" if LOWMEM_SIZE_BOOL
167	default "0x30000000"
168
169config MANUAL_RESET_VECTOR
170	hex "Microblaze reset vector address setup"
171	default "0x0"
172	help
173	  Set this option to have the kernel override the CPU Reset vector.
174	  If zero, no change will be made to the MicroBlaze reset vector at
175	  address 0x0.
176	  If non-zero, a jump instruction to this address, will be written
177	  to the reset vector at address 0x0.
178	  If you are unsure, set it to default value 0x0.
179
180config KERNEL_START_BOOL
181	bool "Set custom kernel base address"
182	depends on ADVANCED_OPTIONS
183	help
184	  This option allows you to set the kernel virtual address at which
185	  the kernel will map low memory (the kernel image will be linked at
186	  this address).  This can be useful in optimizing the virtual memory
187	  layout of the system.
188
189	  Say N here unless you know what you are doing.
190
191config KERNEL_START
192	hex "Virtual address of kernel base" if KERNEL_START_BOOL
193	default "0xc0000000"
194
195config TASK_SIZE_BOOL
196	bool "Set custom user task size"
197	depends on ADVANCED_OPTIONS
198	help
199	  This option allows you to set the amount of virtual address space
200	  allocated to user tasks.  This can be useful in optimizing the
201	  virtual memory layout of the system.
202
203	  Say N here unless you know what you are doing.
204
205config TASK_SIZE
206	hex "Size of user task space" if TASK_SIZE_BOOL
207	default "0x80000000"
208
209config MB_MANAGER
210	bool "Support for Microblaze Manager"
211	depends on ADVANCED_OPTIONS
212	help
213	  This option enables API for configuring the MicroBlaze manager
214	  control register, which is consumed by the break handler to
215	  block the break.
216
217	  Say N here unless you know what you are doing.
218
219endmenu
220