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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"
1config MICROBLAZE
2 def_bool y
3 select HAVE_MEMBLOCK
4 select HAVE_MEMBLOCK_NODE_MAP
5 select HAVE_FUNCTION_TRACER
6 select HAVE_FUNCTION_TRACE_MCOUNT_TEST
7 select HAVE_FUNCTION_GRAPH_TRACER
8 select HAVE_DYNAMIC_FTRACE
9 select HAVE_FTRACE_MCOUNT_RECORD
10 select ARCH_WANT_OPTIONAL_GPIOLIB
11 select HAVE_OPROFILE
12 select HAVE_ARCH_KGDB
13 select HAVE_DMA_ATTRS
14 select HAVE_DMA_API_DEBUG
15 select TRACING_SUPPORT
16 select OF
17 select OF_EARLY_FLATTREE
18 select IRQ_DOMAIN
19 select HAVE_GENERIC_HARDIRQS
20 select GENERIC_IRQ_PROBE
21 select GENERIC_IRQ_SHOW
22 select GENERIC_PCI_IOMAP
23 select GENERIC_CPU_DEVICES
24 select GENERIC_ATOMIC64
25 select GENERIC_CLOCKEVENTS
26
27config SWAP
28 def_bool n
29
30config RWSEM_GENERIC_SPINLOCK
31 def_bool y
32
33config ZONE_DMA
34 def_bool y
35
36config ARCH_POPULATES_NODE_MAP
37 def_bool y
38
39config RWSEM_XCHGADD_ALGORITHM
40 bool
41
42config ARCH_HAS_ILOG2_U32
43 def_bool n
44
45config ARCH_HAS_ILOG2_U64
46 def_bool n
47
48config GENERIC_HWEIGHT
49 def_bool y
50
51config GENERIC_CALIBRATE_DELAY
52 def_bool y
53
54config GENERIC_GPIO
55 bool
56
57config GENERIC_CSUM
58 def_bool y
59
60config STACKTRACE_SUPPORT
61 def_bool y
62
63config LOCKDEP_SUPPORT
64 def_bool y
65
66config HAVE_LATENCYTOP_SUPPORT
67 def_bool y
68
69source "init/Kconfig"
70
71source "kernel/Kconfig.freezer"
72
73source "arch/microblaze/platform/Kconfig.platform"
74
75menu "Processor type and features"
76
77source "kernel/Kconfig.preempt"
78
79source "kernel/Kconfig.hz"
80
81config MMU
82 bool "MMU support"
83 default n
84
85config NO_MMU
86 bool
87 depends on !MMU
88 default y
89
90comment "Boot options"
91
92config CMDLINE_BOOL
93 bool "Default bootloader kernel arguments"
94
95config CMDLINE
96 string "Default kernel command string"
97 depends on CMDLINE_BOOL
98 default "console=ttyUL0,115200"
99 help
100 On some architectures there is currently no way for the boot loader
101 to pass arguments to the kernel. For these architectures, you should
102 supply some command-line options at build time by entering them
103 here.
104
105config CMDLINE_FORCE
106 bool "Force default kernel command string"
107 depends on CMDLINE_BOOL
108 default n
109 help
110 Set this to have arguments from the default kernel command string
111 override those passed by the boot loader.
112
113config SECCOMP
114 bool "Enable seccomp to safely compute untrusted bytecode"
115 depends on PROC_FS
116 default y
117 help
118 This kernel feature is useful for number crunching applications
119 that may need to compute untrusted bytecode during their
120 execution. By using pipes or other transports made available to
121 the process as file descriptors supporting the read/write
122 syscalls, it's possible to isolate those applications in
123 their own address space using seccomp. Once seccomp is
124 enabled via /proc/<pid>/seccomp, it cannot be disabled
125 and the task is only allowed to execute a few safe syscalls
126 defined by each seccomp mode.
127
128 If unsure, say Y. Only embedded should say N here.
129
130endmenu
131
132menu "Advanced setup"
133
134config ADVANCED_OPTIONS
135 bool "Prompt for advanced kernel configuration options"
136 help
137 This option will enable prompting for a variety of advanced kernel
138 configuration options. These options can cause the kernel to not
139 work if they are set incorrectly, but can be used to optimize certain
140 aspects of kernel memory management.
141
142 Unless you know what you are doing, say N here.
143
144comment "Default settings for advanced configuration options are used"
145 depends on !ADVANCED_OPTIONS
146
147config XILINX_UNCACHED_SHADOW
148 bool "Are you using uncached shadow for RAM ?"
149 depends on ADVANCED_OPTIONS && !MMU
150 default n
151 help
152 This is needed to be able to allocate uncachable memory regions.
153 The feature requires the design to define the RAM memory controller
154 window to be twice as large as the actual physical memory.
155
156config HIGHMEM
157 bool "High memory support"
158 depends on MMU
159 help
160 The address space of Microblaze processors is only 4 Gigabytes large
161 and it has to accommodate user address space, kernel address
162 space as well as some memory mapped IO. That means that, if you
163 have a large amount of physical memory and/or IO, not all of the
164 memory can be "permanently mapped" by the kernel. The physical
165 memory that is not permanently mapped is called "high memory".
166
167 If unsure, say n.
168
169config LOWMEM_SIZE_BOOL
170 bool "Set maximum low memory"
171 depends on ADVANCED_OPTIONS && MMU
172 help
173 This option allows you to set the maximum amount of memory which
174 will be used as "low memory", that is, memory which the kernel can
175 access directly, without having to set up a kernel virtual mapping.
176 This can be useful in optimizing the layout of kernel virtual
177 memory.
178
179 Say N here unless you know what you are doing.
180
181config LOWMEM_SIZE
182 hex "Maximum low memory size (in bytes)" if LOWMEM_SIZE_BOOL
183 default "0x30000000"
184
185config MANUAL_RESET_VECTOR
186 hex "Microblaze reset vector address setup"
187 default "0x0"
188 help
189 Set this option to have the kernel override the CPU Reset vector.
190 If zero, no change will be made to the MicroBlaze reset vector at
191 address 0x0.
192 If non-zero, a jump instruction to this address, will be written
193 to the reset vector at address 0x0.
194 If you are unsure, set it to default value 0x0.
195
196config KERNEL_START_BOOL
197 bool "Set custom kernel base address"
198 depends on ADVANCED_OPTIONS
199 help
200 This option allows you to set the kernel virtual address at which
201 the kernel will map low memory (the kernel image will be linked at
202 this address). This can be useful in optimizing the virtual memory
203 layout of the system.
204
205 Say N here unless you know what you are doing.
206
207config KERNEL_START
208 hex "Virtual address of kernel base" if KERNEL_START_BOOL
209 default "0xc0000000" if MMU
210 default KERNEL_BASE_ADDR if !MMU
211
212config TASK_SIZE_BOOL
213 bool "Set custom user task size"
214 depends on ADVANCED_OPTIONS && MMU
215 help
216 This option allows you to set the amount of virtual address space
217 allocated to user tasks. This can be useful in optimizing the
218 virtual memory layout of the system.
219
220 Say N here unless you know what you are doing.
221
222config TASK_SIZE
223 hex "Size of user task space" if TASK_SIZE_BOOL
224 default "0x80000000"
225
226choice
227 prompt "Page size"
228 default MICROBLAZE_4K_PAGES
229 depends on ADVANCED_OPTIONS && !MMU
230 help
231 Select the kernel logical page size. Increasing the page size
232 will reduce software overhead at each page boundary, allow
233 hardware prefetch mechanisms to be more effective, and allow
234 larger dma transfers increasing IO efficiency and reducing
235 overhead. However the utilization of memory will increase.
236 For example, each cached file will using a multiple of the
237 page size to hold its contents and the difference between the
238 end of file and the end of page is wasted.
239
240 If unsure, choose 4K_PAGES.
241
242config MICROBLAZE_4K_PAGES
243 bool "4k page size"
244
245config MICROBLAZE_8K_PAGES
246 bool "8k page size"
247
248config MICROBLAZE_16K_PAGES
249 bool "16k page size"
250
251config MICROBLAZE_32K_PAGES
252 bool "32k page size"
253
254endchoice
255
256config KERNEL_PAD
257 hex "Kernel PAD for unpacking" if ADVANCED_OPTIONS
258 default "0x80000" if MMU
259
260endmenu
261
262source "mm/Kconfig"
263
264menu "Executable file formats"
265
266source "fs/Kconfig.binfmt"
267
268endmenu
269
270menu "Bus Options"
271
272config PCI
273 bool "PCI support"
274
275config PCI_DOMAINS
276 def_bool PCI
277
278config PCI_SYSCALL
279 def_bool PCI
280
281config PCI_XILINX
282 bool "Xilinx PCI host bridge support"
283 depends on PCI
284
285source "drivers/pci/Kconfig"
286
287endmenu
288
289source "net/Kconfig"
290
291source "drivers/Kconfig"
292
293source "fs/Kconfig"
294
295source "arch/microblaze/Kconfig.debug"
296
297source "security/Kconfig"
298
299source "crypto/Kconfig"
300
301source "lib/Kconfig"