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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 ARCH_HAS_GCOV_PROFILE_ALL
4 select ARCH_MIGHT_HAVE_PC_PARPORT
5 select ARCH_WANT_IPC_PARSE_VERSION
6 select ARCH_WANT_OPTIONAL_GPIOLIB
7 select BUILDTIME_EXTABLE_SORT
8 select CLKSRC_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_KGDB
20 select HAVE_DEBUG_KMEMLEAK
21 select HAVE_DMA_API_DEBUG
22 select HAVE_DYNAMIC_FTRACE
23 select HAVE_FTRACE_MCOUNT_RECORD
24 select HAVE_FUNCTION_GRAPH_TRACER
25 select HAVE_FUNCTION_TRACER
26 select HAVE_MEMBLOCK
27 select HAVE_MEMBLOCK_NODE_MAP
28 select HAVE_OPROFILE
29 select IRQ_DOMAIN
30 select MODULES_USE_ELF_RELA
31 select OF
32 select OF_EARLY_FLATTREE
33 select TRACING_SUPPORT
34 select VIRT_TO_BUS
35
36config SWAP
37 def_bool n
38
39config RWSEM_GENERIC_SPINLOCK
40 def_bool y
41
42config ZONE_DMA
43 def_bool y
44
45config RWSEM_XCHGADD_ALGORITHM
46 bool
47
48config ARCH_HAS_ILOG2_U32
49 def_bool n
50
51config ARCH_HAS_ILOG2_U64
52 def_bool n
53
54config GENERIC_HWEIGHT
55 def_bool y
56
57config GENERIC_CALIBRATE_DELAY
58 def_bool y
59
60config GENERIC_CSUM
61 def_bool y
62
63config STACKTRACE_SUPPORT
64 def_bool y
65
66config LOCKDEP_SUPPORT
67 def_bool y
68
69source "init/Kconfig"
70
71source "kernel/Kconfig.freezer"
72
73source "arch/microblaze/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
85comment "Boot options"
86
87config CMDLINE_BOOL
88 bool "Default bootloader kernel arguments"
89
90config CMDLINE
91 string "Default kernel command string"
92 depends on CMDLINE_BOOL
93 default "console=ttyUL0,115200"
94 help
95 On some architectures there is currently no way for the boot loader
96 to pass arguments to the kernel. For these architectures, you should
97 supply some command-line options at build time by entering them
98 here.
99
100config CMDLINE_FORCE
101 bool "Force default kernel command string"
102 depends on CMDLINE_BOOL
103 default n
104 help
105 Set this to have arguments from the default kernel command string
106 override those passed by the boot loader.
107
108config SECCOMP
109 bool "Enable seccomp to safely compute untrusted bytecode"
110 depends on PROC_FS
111 default y
112 help
113 This kernel feature is useful for number crunching applications
114 that may need to compute untrusted bytecode during their
115 execution. By using pipes or other transports made available to
116 the process as file descriptors supporting the read/write
117 syscalls, it's possible to isolate those applications in
118 their own address space using seccomp. Once seccomp is
119 enabled via /proc/<pid>/seccomp, it cannot be disabled
120 and the task is only allowed to execute a few safe syscalls
121 defined by each seccomp mode.
122
123 If unsure, say Y. Only embedded should say N here.
124
125endmenu
126
127menu "Kernel features"
128
129config NR_CPUS
130 int
131 default "1"
132
133config ADVANCED_OPTIONS
134 bool "Prompt for advanced kernel configuration options"
135 help
136 This option will enable prompting for a variety of advanced kernel
137 configuration options. These options can cause the kernel to not
138 work if they are set incorrectly, but can be used to optimize certain
139 aspects of kernel memory management.
140
141 Unless you know what you are doing, say N here.
142
143comment "Default settings for advanced configuration options are used"
144 depends on !ADVANCED_OPTIONS
145
146config XILINX_UNCACHED_SHADOW
147 bool "Are you using uncached shadow for RAM ?"
148 depends on ADVANCED_OPTIONS && !MMU
149 default n
150 help
151 This is needed to be able to allocate uncachable memory regions.
152 The feature requires the design to define the RAM memory controller
153 window to be twice as large as the actual physical memory.
154
155config HIGHMEM
156 bool "High memory support"
157 depends on MMU
158 help
159 The address space of Microblaze processors is only 4 Gigabytes large
160 and it has to accommodate user address space, kernel address
161 space as well as some memory mapped IO. That means that, if you
162 have a large amount of physical memory and/or IO, not all of the
163 memory can be "permanently mapped" by the kernel. The physical
164 memory that is not permanently mapped is called "high memory".
165
166 If unsure, say n.
167
168config LOWMEM_SIZE_BOOL
169 bool "Set maximum low memory"
170 depends on ADVANCED_OPTIONS && MMU
171 help
172 This option allows you to set the maximum amount of memory which
173 will be used as "low memory", that is, memory which the kernel can
174 access directly, without having to set up a kernel virtual mapping.
175 This can be useful in optimizing the layout of kernel virtual
176 memory.
177
178 Say N here unless you know what you are doing.
179
180config LOWMEM_SIZE
181 hex "Maximum low memory size (in bytes)" if LOWMEM_SIZE_BOOL
182 default "0x30000000"
183
184config MANUAL_RESET_VECTOR
185 hex "Microblaze reset vector address setup"
186 default "0x0"
187 help
188 Set this option to have the kernel override the CPU Reset vector.
189 If zero, no change will be made to the MicroBlaze reset vector at
190 address 0x0.
191 If non-zero, a jump instruction to this address, will be written
192 to the reset vector at address 0x0.
193 If you are unsure, set it to default value 0x0.
194
195config KERNEL_START_BOOL
196 bool "Set custom kernel base address"
197 depends on ADVANCED_OPTIONS
198 help
199 This option allows you to set the kernel virtual address at which
200 the kernel will map low memory (the kernel image will be linked at
201 this address). This can be useful in optimizing the virtual memory
202 layout of the system.
203
204 Say N here unless you know what you are doing.
205
206config KERNEL_START
207 hex "Virtual address of kernel base" if KERNEL_START_BOOL
208 default "0xc0000000" if MMU
209 default KERNEL_BASE_ADDR if !MMU
210
211config TASK_SIZE_BOOL
212 bool "Set custom user task size"
213 depends on ADVANCED_OPTIONS && MMU
214 help
215 This option allows you to set the amount of virtual address space
216 allocated to user tasks. This can be useful in optimizing the
217 virtual memory layout of the system.
218
219 Say N here unless you know what you are doing.
220
221config TASK_SIZE
222 hex "Size of user task space" if TASK_SIZE_BOOL
223 default "0x80000000"
224
225choice
226 prompt "Page size"
227 default MICROBLAZE_4K_PAGES
228 depends on ADVANCED_OPTIONS && !MMU
229 help
230 Select the kernel logical page size. Increasing the page size
231 will reduce software overhead at each page boundary, allow
232 hardware prefetch mechanisms to be more effective, and allow
233 larger dma transfers increasing IO efficiency and reducing
234 overhead. However the utilization of memory will increase.
235 For example, each cached file will using a multiple of the
236 page size to hold its contents and the difference between the
237 end of file and the end of page is wasted.
238
239 If unsure, choose 4K_PAGES.
240
241config MICROBLAZE_4K_PAGES
242 bool "4k page size"
243
244config MICROBLAZE_16K_PAGES
245 bool "16k page size"
246
247config MICROBLAZE_64K_PAGES
248 bool "64k page size"
249
250endchoice
251
252source "mm/Kconfig"
253
254endmenu
255
256menu "Executable file formats"
257
258source "fs/Kconfig.binfmt"
259
260endmenu
261
262menu "Bus Options"
263
264config PCI
265 bool "PCI support"
266
267config PCI_DOMAINS
268 def_bool PCI
269
270config PCI_DOMAINS_GENERIC
271 def_bool PCI_DOMAINS
272
273config PCI_SYSCALL
274 def_bool PCI
275
276config PCI_XILINX
277 bool "Xilinx PCI host bridge support"
278 depends on PCI
279
280source "drivers/pci/Kconfig"
281
282endmenu
283
284source "net/Kconfig"
285
286source "drivers/Kconfig"
287
288source "fs/Kconfig"
289
290source "arch/microblaze/Kconfig.debug"
291
292source "security/Kconfig"
293
294source "crypto/Kconfig"
295
296source "lib/Kconfig"