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