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1config MICROBLAZE
2 def_bool y
3 select ARCH_HAS_GCOV_PROFILE_ALL
4 select ARCH_MIGHT_HAVE_PC_PARPORT
5 select ARCH_NO_COHERENT_DMA_MMAP if !MMU
6 select ARCH_WANT_IPC_PARSE_VERSION
7 select BUILDTIME_EXTABLE_SORT
8 select TIMER_OF
9 select CLONE_BACKWARDS3
10 select COMMON_CLK
11 select GENERIC_ATOMIC64
12 select GENERIC_CLOCKEVENTS
13 select GENERIC_CPU_DEVICES
14 select GENERIC_IDLE_POLL_SETUP
15 select GENERIC_IRQ_PROBE
16 select GENERIC_IRQ_SHOW
17 select GENERIC_PCI_IOMAP
18 select GENERIC_SCHED_CLOCK
19 select HAVE_ARCH_HASH
20 select HAVE_ARCH_KGDB
21 select HAVE_DEBUG_KMEMLEAK
22 select HAVE_DMA_API_DEBUG
23 select HAVE_DYNAMIC_FTRACE
24 select HAVE_FTRACE_MCOUNT_RECORD
25 select HAVE_FUNCTION_GRAPH_TRACER
26 select HAVE_FUNCTION_TRACER
27 select NO_BOOTMEM
28 select HAVE_MEMBLOCK
29 select HAVE_MEMBLOCK_NODE_MAP
30 select HAVE_OPROFILE
31 select IRQ_DOMAIN
32 select XILINX_INTC
33 select MODULES_USE_ELF_RELA
34 select OF
35 select OF_EARLY_FLATTREE
36 select TRACING_SUPPORT
37 select VIRT_TO_BUS
38 select CPU_NO_EFFICIENT_FFS
39
40# Endianness selection
41choice
42 prompt "Endianness selection"
43 default CPU_LITTLE_ENDIAN
44 help
45 microblaze architectures can be configured for either little or
46 big endian formats. Be sure to select the appropriate mode.
47
48config CPU_BIG_ENDIAN
49 bool "Big endian"
50
51config CPU_LITTLE_ENDIAN
52 bool "Little endian"
53
54endchoice
55
56config SWAP
57 def_bool n
58
59config RWSEM_GENERIC_SPINLOCK
60 def_bool y
61
62config ZONE_DMA
63 def_bool y
64
65config RWSEM_XCHGADD_ALGORITHM
66 bool
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 "init/Kconfig"
90
91source "kernel/Kconfig.freezer"
92
93source "arch/microblaze/Kconfig.platform"
94
95menu "Processor type and features"
96
97source "kernel/Kconfig.preempt"
98
99source "kernel/Kconfig.hz"
100
101config MMU
102 bool "MMU support"
103 default n
104
105comment "Boot options"
106
107config CMDLINE_BOOL
108 bool "Default bootloader kernel arguments"
109
110config CMDLINE
111 string "Default kernel command string"
112 depends on CMDLINE_BOOL
113 default "console=ttyUL0,115200"
114 help
115 On some architectures there is currently no way for the boot loader
116 to pass arguments to the kernel. For these architectures, you should
117 supply some command-line options at build time by entering them
118 here.
119
120config CMDLINE_FORCE
121 bool "Force default kernel command string"
122 depends on CMDLINE_BOOL
123 default n
124 help
125 Set this to have arguments from the default kernel command string
126 override those passed by the boot loader.
127
128config SECCOMP
129 bool "Enable seccomp to safely compute untrusted bytecode"
130 depends on PROC_FS
131 default y
132 help
133 This kernel feature is useful for number crunching applications
134 that may need to compute untrusted bytecode during their
135 execution. By using pipes or other transports made available to
136 the process as file descriptors supporting the read/write
137 syscalls, it's possible to isolate those applications in
138 their own address space using seccomp. Once seccomp is
139 enabled via /proc/<pid>/seccomp, it cannot be disabled
140 and the task is only allowed to execute a few safe syscalls
141 defined by each seccomp mode.
142
143 If unsure, say Y. Only embedded should say N here.
144
145endmenu
146
147menu "Kernel features"
148
149config NR_CPUS
150 int
151 default "1"
152
153config ADVANCED_OPTIONS
154 bool "Prompt for advanced kernel configuration options"
155 help
156 This option will enable prompting for a variety of advanced kernel
157 configuration options. These options can cause the kernel to not
158 work if they are set incorrectly, but can be used to optimize certain
159 aspects of kernel memory management.
160
161 Unless you know what you are doing, say N here.
162
163comment "Default settings for advanced configuration options are used"
164 depends on !ADVANCED_OPTIONS
165
166config XILINX_UNCACHED_SHADOW
167 bool "Are you using uncached shadow for RAM ?"
168 depends on ADVANCED_OPTIONS && !MMU
169 default n
170 help
171 This is needed to be able to allocate uncachable memory regions.
172 The feature requires the design to define the RAM memory controller
173 window to be twice as large as the actual physical memory.
174
175config HIGHMEM
176 bool "High memory support"
177 depends on MMU
178 help
179 The address space of Microblaze processors is only 4 Gigabytes large
180 and it has to accommodate user address space, kernel address
181 space as well as some memory mapped IO. That means that, if you
182 have a large amount of physical memory and/or IO, not all of the
183 memory can be "permanently mapped" by the kernel. The physical
184 memory that is not permanently mapped is called "high memory".
185
186 If unsure, say n.
187
188config LOWMEM_SIZE_BOOL
189 bool "Set maximum low memory"
190 depends on ADVANCED_OPTIONS && MMU
191 help
192 This option allows you to set the maximum amount of memory which
193 will be used as "low memory", that is, memory which the kernel can
194 access directly, without having to set up a kernel virtual mapping.
195 This can be useful in optimizing the layout of kernel virtual
196 memory.
197
198 Say N here unless you know what you are doing.
199
200config LOWMEM_SIZE
201 hex "Maximum low memory size (in bytes)" if LOWMEM_SIZE_BOOL
202 default "0x30000000"
203
204config MANUAL_RESET_VECTOR
205 hex "Microblaze reset vector address setup"
206 default "0x0"
207 help
208 Set this option to have the kernel override the CPU Reset vector.
209 If zero, no change will be made to the MicroBlaze reset vector at
210 address 0x0.
211 If non-zero, a jump instruction to this address, will be written
212 to the reset vector at address 0x0.
213 If you are unsure, set it to default value 0x0.
214
215config KERNEL_START_BOOL
216 bool "Set custom kernel base address"
217 depends on ADVANCED_OPTIONS
218 help
219 This option allows you to set the kernel virtual address at which
220 the kernel will map low memory (the kernel image will be linked at
221 this address). This can be useful in optimizing the virtual memory
222 layout of the system.
223
224 Say N here unless you know what you are doing.
225
226config KERNEL_START
227 hex "Virtual address of kernel base" if KERNEL_START_BOOL
228 default "0xc0000000" if MMU
229 default KERNEL_BASE_ADDR if !MMU
230
231config TASK_SIZE_BOOL
232 bool "Set custom user task size"
233 depends on ADVANCED_OPTIONS && MMU
234 help
235 This option allows you to set the amount of virtual address space
236 allocated to user tasks. This can be useful in optimizing the
237 virtual memory layout of the system.
238
239 Say N here unless you know what you are doing.
240
241config TASK_SIZE
242 hex "Size of user task space" if TASK_SIZE_BOOL
243 default "0x80000000"
244
245choice
246 prompt "Page size"
247 default MICROBLAZE_4K_PAGES
248 depends on ADVANCED_OPTIONS && !MMU
249 help
250 Select the kernel logical page size. Increasing the page size
251 will reduce software overhead at each page boundary, allow
252 hardware prefetch mechanisms to be more effective, and allow
253 larger dma transfers increasing IO efficiency and reducing
254 overhead. However the utilization of memory will increase.
255 For example, each cached file will using a multiple of the
256 page size to hold its contents and the difference between the
257 end of file and the end of page is wasted.
258
259 If unsure, choose 4K_PAGES.
260
261config MICROBLAZE_4K_PAGES
262 bool "4k page size"
263
264config MICROBLAZE_16K_PAGES
265 bool "16k page size"
266
267config MICROBLAZE_64K_PAGES
268 bool "64k page size"
269
270endchoice
271
272source "mm/Kconfig"
273
274endmenu
275
276menu "Executable file formats"
277
278source "fs/Kconfig.binfmt"
279
280endmenu
281
282menu "Bus Options"
283
284config PCI
285 bool "PCI support"
286
287config PCI_DOMAINS
288 def_bool PCI
289
290config PCI_DOMAINS_GENERIC
291 def_bool PCI_DOMAINS
292
293config PCI_SYSCALL
294 def_bool PCI
295
296config PCI_XILINX
297 bool "Xilinx PCI host bridge support"
298 depends on PCI
299
300source "drivers/pci/Kconfig"
301
302endmenu
303
304source "net/Kconfig"
305
306source "drivers/Kconfig"
307
308source "fs/Kconfig"
309
310source "arch/microblaze/Kconfig.debug"
311
312source "security/Kconfig"
313
314source "crypto/Kconfig"
315
316source "lib/Kconfig"
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