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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_BINFMT_FLAT if !MMU
7 select ARCH_HAS_DMA_PREP_COHERENT
8 select ARCH_HAS_GCOV_PROFILE_ALL
9 select ARCH_HAS_SYNC_DMA_FOR_CPU
10 select ARCH_HAS_SYNC_DMA_FOR_DEVICE
11 select ARCH_HAS_DMA_SET_UNCACHED if !MMU
12 select ARCH_MIGHT_HAVE_PC_PARPORT
13 select ARCH_WANT_IPC_PARSE_VERSION
14 select BUILDTIME_TABLE_SORT
15 select TIMER_OF
16 select CLONE_BACKWARDS3
17 select COMMON_CLK
18 select DMA_DIRECT_REMAP if MMU
19 select GENERIC_ATOMIC64
20 select GENERIC_CLOCKEVENTS
21 select GENERIC_CPU_DEVICES
22 select GENERIC_IDLE_POLL_SETUP
23 select GENERIC_IRQ_PROBE
24 select GENERIC_IRQ_SHOW
25 select GENERIC_PCI_IOMAP
26 select GENERIC_SCHED_CLOCK
27 select HAVE_ARCH_HASH
28 select HAVE_ARCH_KGDB
29 select HAVE_DEBUG_KMEMLEAK
30 select HAVE_DMA_CONTIGUOUS
31 select HAVE_DYNAMIC_FTRACE
32 select HAVE_FTRACE_MCOUNT_RECORD
33 select HAVE_FUNCTION_GRAPH_TRACER
34 select HAVE_FUNCTION_TRACER
35 select HAVE_OPROFILE
36 select HAVE_PCI
37 select IRQ_DOMAIN
38 select XILINX_INTC
39 select MODULES_USE_ELF_RELA
40 select OF
41 select OF_EARLY_FLATTREE
42 select PCI_DOMAINS_GENERIC if PCI
43 select PCI_SYSCALL if PCI
44 select TRACING_SUPPORT
45 select VIRT_TO_BUS
46 select CPU_NO_EFFICIENT_FFS
47 select MMU_GATHER_NO_RANGE if MMU
48 select SPARSE_IRQ
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 ZONE_DMA
67 def_bool y
68
69config ARCH_HAS_ILOG2_U32
70 def_bool n
71
72config ARCH_HAS_ILOG2_U64
73 def_bool n
74
75config GENERIC_HWEIGHT
76 def_bool y
77
78config GENERIC_CALIBRATE_DELAY
79 def_bool y
80
81config GENERIC_CSUM
82 def_bool y
83
84config STACKTRACE_SUPPORT
85 def_bool y
86
87config LOCKDEP_SUPPORT
88 def_bool y
89
90source "arch/microblaze/Kconfig.platform"
91
92menu "Processor type and features"
93
94source "kernel/Kconfig.hz"
95
96config MMU
97 bool "MMU support"
98 default n
99
100comment "Boot options"
101
102config CMDLINE_BOOL
103 bool "Default bootloader kernel arguments"
104
105config CMDLINE
106 string "Default kernel command string"
107 depends on CMDLINE_BOOL
108 default "console=ttyUL0,115200"
109 help
110 On some architectures there is currently no way for the boot loader
111 to pass arguments to the kernel. For these architectures, you should
112 supply some command-line options at build time by entering them
113 here.
114
115config CMDLINE_FORCE
116 bool "Force default kernel command string"
117 depends on CMDLINE_BOOL
118 default n
119 help
120 Set this to have arguments from the default kernel command string
121 override those passed by the boot loader.
122
123config SECCOMP
124 bool "Enable seccomp to safely compute untrusted bytecode"
125 depends on PROC_FS
126 default y
127 help
128 This kernel feature is useful for number crunching applications
129 that may need to compute untrusted bytecode during their
130 execution. By using pipes or other transports made available to
131 the process as file descriptors supporting the read/write
132 syscalls, it's possible to isolate those applications in
133 their own address space using seccomp. Once seccomp is
134 enabled via /proc/<pid>/seccomp, it cannot be disabled
135 and the task is only allowed to execute a few safe syscalls
136 defined by each seccomp mode.
137
138 If unsure, say Y. Only embedded should say N here.
139
140endmenu
141
142menu "Kernel features"
143
144config NR_CPUS
145 int
146 default "1"
147
148config ADVANCED_OPTIONS
149 bool "Prompt for advanced kernel configuration options"
150 help
151 This option will enable prompting for a variety of advanced kernel
152 configuration options. These options can cause the kernel to not
153 work if they are set incorrectly, but can be used to optimize certain
154 aspects of kernel memory management.
155
156 Unless you know what you are doing, say N here.
157
158comment "Default settings for advanced configuration options are used"
159 depends on !ADVANCED_OPTIONS
160
161config XILINX_UNCACHED_SHADOW
162 bool "Are you using uncached shadow for RAM ?"
163 depends on ADVANCED_OPTIONS && !MMU
164 default n
165 help
166 This is needed to be able to allocate uncachable memory regions.
167 The feature requires the design to define the RAM memory controller
168 window to be twice as large as the actual physical memory.
169
170config HIGHMEM
171 bool "High memory support"
172 depends on MMU
173 help
174 The address space of Microblaze processors is only 4 Gigabytes large
175 and it has to accommodate user address space, kernel address
176 space as well as some memory mapped IO. That means that, if you
177 have a large amount of physical memory and/or IO, not all of the
178 memory can be "permanently mapped" by the kernel. The physical
179 memory that is not permanently mapped is called "high memory".
180
181 If unsure, say n.
182
183config LOWMEM_SIZE_BOOL
184 bool "Set maximum low memory"
185 depends on ADVANCED_OPTIONS && MMU
186 help
187 This option allows you to set the maximum amount of memory which
188 will be used as "low memory", that is, memory which the kernel can
189 access directly, without having to set up a kernel virtual mapping.
190 This can be useful in optimizing the layout of kernel virtual
191 memory.
192
193 Say N here unless you know what you are doing.
194
195config LOWMEM_SIZE
196 hex "Maximum low memory size (in bytes)" if LOWMEM_SIZE_BOOL
197 default "0x30000000"
198
199config MANUAL_RESET_VECTOR
200 hex "Microblaze reset vector address setup"
201 default "0x0"
202 help
203 Set this option to have the kernel override the CPU Reset vector.
204 If zero, no change will be made to the MicroBlaze reset vector at
205 address 0x0.
206 If non-zero, a jump instruction to this address, will be written
207 to the reset vector at address 0x0.
208 If you are unsure, set it to default value 0x0.
209
210config KERNEL_START_BOOL
211 bool "Set custom kernel base address"
212 depends on ADVANCED_OPTIONS
213 help
214 This option allows you to set the kernel virtual address at which
215 the kernel will map low memory (the kernel image will be linked at
216 this address). This can be useful in optimizing the virtual memory
217 layout of the system.
218
219 Say N here unless you know what you are doing.
220
221config KERNEL_START
222 hex "Virtual address of kernel base" if KERNEL_START_BOOL
223 default "0xc0000000" if MMU
224 default KERNEL_BASE_ADDR if !MMU
225
226config TASK_SIZE_BOOL
227 bool "Set custom user task size"
228 depends on ADVANCED_OPTIONS && MMU
229 help
230 This option allows you to set the amount of virtual address space
231 allocated to user tasks. This can be useful in optimizing the
232 virtual memory layout of the system.
233
234 Say N here unless you know what you are doing.
235
236config TASK_SIZE
237 hex "Size of user task space" if TASK_SIZE_BOOL
238 default "0x80000000"
239
240choice
241 prompt "Page size"
242 default MICROBLAZE_4K_PAGES
243 depends on ADVANCED_OPTIONS && !MMU
244 help
245 Select the kernel logical page size. Increasing the page size
246 will reduce software overhead at each page boundary, allow
247 hardware prefetch mechanisms to be more effective, and allow
248 larger dma transfers increasing IO efficiency and reducing
249 overhead. However the utilization of memory will increase.
250 For example, each cached file will using a multiple of the
251 page size to hold its contents and the difference between the
252 end of file and the end of page is wasted.
253
254 If unsure, choose 4K_PAGES.
255
256config MICROBLAZE_4K_PAGES
257 bool "4k page size"
258
259config MICROBLAZE_16K_PAGES
260 bool "16k page size"
261
262config MICROBLAZE_64K_PAGES
263 bool "64k page size"
264
265endchoice
266
267endmenu
268
269menu "Bus Options"
270
271config PCI_XILINX
272 bool "Xilinx PCI host bridge support"
273 depends on PCI
274
275endmenu
1config MICROBLAZE
2 def_bool y
3 select HAVE_MEMBLOCK
4 select HAVE_FUNCTION_TRACER
5 select HAVE_FUNCTION_TRACE_MCOUNT_TEST
6 select HAVE_FUNCTION_GRAPH_TRACER
7 select HAVE_DYNAMIC_FTRACE
8 select HAVE_FTRACE_MCOUNT_RECORD
9 select ARCH_WANT_OPTIONAL_GPIOLIB
10 select HAVE_OPROFILE
11 select HAVE_ARCH_KGDB
12 select HAVE_DMA_ATTRS
13 select HAVE_DMA_API_DEBUG
14 select TRACING_SUPPORT
15 select OF
16 select OF_EARLY_FLATTREE
17 select HAVE_GENERIC_HARDIRQS
18 select GENERIC_IRQ_PROBE
19 select GENERIC_IRQ_SHOW
20
21config SWAP
22 def_bool n
23
24config RWSEM_GENERIC_SPINLOCK
25 def_bool y
26
27config RWSEM_XCHGADD_ALGORITHM
28 bool
29
30config ARCH_HAS_ILOG2_U32
31 def_bool n
32
33config ARCH_HAS_ILOG2_U64
34 def_bool n
35
36config GENERIC_HWEIGHT
37 def_bool y
38
39config GENERIC_CALIBRATE_DELAY
40 def_bool y
41
42config GENERIC_TIME_VSYSCALL
43 def_bool n
44
45config GENERIC_CLOCKEVENTS
46 def_bool y
47
48config GENERIC_GPIO
49 def_bool y
50
51config GENERIC_CSUM
52 def_bool y
53
54config STACKTRACE_SUPPORT
55 def_bool y
56
57config LOCKDEP_SUPPORT
58 def_bool y
59
60config HAVE_LATENCYTOP_SUPPORT
61 def_bool y
62
63source "init/Kconfig"
64
65source "kernel/Kconfig.freezer"
66
67source "arch/microblaze/platform/Kconfig.platform"
68
69menu "Processor type and features"
70
71source "kernel/time/Kconfig"
72
73source "kernel/Kconfig.preempt"
74
75source "kernel/Kconfig.hz"
76
77config MMU
78 bool "MMU support"
79 default n
80
81config NO_MMU
82 bool
83 depends on !MMU
84 default y
85
86comment "Boot options"
87
88config CMDLINE_BOOL
89 bool "Default bootloader kernel arguments"
90
91config CMDLINE
92 string "Default kernel command string"
93 depends on CMDLINE_BOOL
94 default "console=ttyUL0,115200"
95 help
96 On some architectures there is currently no way for the boot loader
97 to pass arguments to the kernel. For these architectures, you should
98 supply some command-line options at build time by entering them
99 here.
100
101config CMDLINE_FORCE
102 bool "Force default kernel command string"
103 depends on CMDLINE_BOOL
104 default n
105 help
106 Set this to have arguments from the default kernel command string
107 override those passed by the boot loader.
108
109config SECCOMP
110 bool "Enable seccomp to safely compute untrusted bytecode"
111 depends on PROC_FS
112 default y
113 help
114 This kernel feature is useful for number crunching applications
115 that may need to compute untrusted bytecode during their
116 execution. By using pipes or other transports made available to
117 the process as file descriptors supporting the read/write
118 syscalls, it's possible to isolate those applications in
119 their own address space using seccomp. Once seccomp is
120 enabled via /proc/<pid>/seccomp, it cannot be disabled
121 and the task is only allowed to execute a few safe syscalls
122 defined by each seccomp mode.
123
124 If unsure, say Y. Only embedded should say N here.
125
126endmenu
127
128menu "Advanced setup"
129
130config ADVANCED_OPTIONS
131 bool "Prompt for advanced kernel configuration options"
132 help
133 This option will enable prompting for a variety of advanced kernel
134 configuration options. These options can cause the kernel to not
135 work if they are set incorrectly, but can be used to optimize certain
136 aspects of kernel memory management.
137
138 Unless you know what you are doing, say N here.
139
140comment "Default settings for advanced configuration options are used"
141 depends on !ADVANCED_OPTIONS
142
143config XILINX_UNCACHED_SHADOW
144 bool "Are you using uncached shadow for RAM ?"
145 depends on ADVANCED_OPTIONS && !MMU
146 default n
147 help
148 This is needed to be able to allocate uncachable memory regions.
149 The feature requires the design to define the RAM memory controller
150 window to be twice as large as the actual physical memory.
151
152config HIGHMEM_START_BOOL
153 bool "Set high memory pool address"
154 depends on ADVANCED_OPTIONS && HIGHMEM
155 help
156 This option allows you to set the base address of the kernel virtual
157 area used to map high memory pages. This can be useful in
158 optimizing the layout of kernel virtual memory.
159
160 Say N here unless you know what you are doing.
161
162config HIGHMEM_START
163 hex "Virtual start address of high memory pool" if HIGHMEM_START_BOOL
164 depends on MMU
165 default "0xfe000000"
166
167config LOWMEM_SIZE_BOOL
168 bool "Set maximum low memory"
169 depends on ADVANCED_OPTIONS && MMU
170 help
171 This option allows you to set the maximum amount of memory which
172 will be used as "low memory", that is, memory which the kernel can
173 access directly, without having to set up a kernel virtual mapping.
174 This can be useful in optimizing the layout of kernel virtual
175 memory.
176
177 Say N here unless you know what you are doing.
178
179config LOWMEM_SIZE
180 hex "Maximum low memory size (in bytes)" if LOWMEM_SIZE_BOOL
181 default "0x30000000"
182
183config MANUAL_RESET_VECTOR
184 hex "Microblaze reset vector address setup"
185 default "0x0"
186 help
187 Set this option to have the kernel override the CPU Reset vector.
188 If zero, no change will be made to the MicroBlaze reset vector at
189 address 0x0.
190 If non-zero, a jump instruction to this address, will be written
191 to the reset vector at address 0x0.
192 If you are unsure, set it to default value 0x0.
193
194config KERNEL_START_BOOL
195 bool "Set custom kernel base address"
196 depends on ADVANCED_OPTIONS
197 help
198 This option allows you to set the kernel virtual address at which
199 the kernel will map low memory (the kernel image will be linked at
200 this address). This can be useful in optimizing the virtual memory
201 layout of the system.
202
203 Say N here unless you know what you are doing.
204
205config KERNEL_START
206 hex "Virtual address of kernel base" if KERNEL_START_BOOL
207 default "0xc0000000" if MMU
208 default KERNEL_BASE_ADDR if !MMU
209
210config TASK_SIZE_BOOL
211 bool "Set custom user task size"
212 depends on ADVANCED_OPTIONS && MMU
213 help
214 This option allows you to set the amount of virtual address space
215 allocated to user tasks. This can be useful in optimizing the
216 virtual memory layout of the system.
217
218 Say N here unless you know what you are doing.
219
220config TASK_SIZE
221 hex "Size of user task space" if TASK_SIZE_BOOL
222 default "0x80000000"
223
224choice
225 prompt "Page size"
226 default MICROBLAZE_4K_PAGES
227 depends on ADVANCED_OPTIONS && !MMU
228 help
229 Select the kernel logical page size. Increasing the page size
230 will reduce software overhead at each page boundary, allow
231 hardware prefetch mechanisms to be more effective, and allow
232 larger dma transfers increasing IO efficiency and reducing
233 overhead. However the utilization of memory will increase.
234 For example, each cached file will using a multiple of the
235 page size to hold its contents and the difference between the
236 end of file and the end of page is wasted.
237
238 If unsure, choose 4K_PAGES.
239
240config MICROBLAZE_4K_PAGES
241 bool "4k page size"
242
243config MICROBLAZE_8K_PAGES
244 bool "8k page size"
245
246config MICROBLAZE_16K_PAGES
247 bool "16k page size"
248
249config MICROBLAZE_32K_PAGES
250 bool "32k page size"
251
252endchoice
253
254endmenu
255
256source "mm/Kconfig"
257
258menu "Executable file formats"
259
260source "fs/Kconfig.binfmt"
261
262endmenu
263
264menu "Bus Options"
265
266config PCI
267 bool "PCI support"
268
269config PCI_DOMAINS
270 def_bool PCI
271
272config PCI_SYSCALL
273 def_bool PCI
274
275config PCI_XILINX
276 bool "Xilinx PCI host bridge support"
277 depends on PCI
278
279source "drivers/pci/Kconfig"
280
281endmenu
282
283source "net/Kconfig"
284
285source "drivers/Kconfig"
286
287source "fs/Kconfig"
288
289source "arch/microblaze/Kconfig.debug"
290
291source "security/Kconfig"
292
293source "crypto/Kconfig"
294
295source "lib/Kconfig"