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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_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 HAS_IOPORT if PCI
25 select HAVE_ARCH_HASH
26 select HAVE_ARCH_KGDB
27 select HAVE_ARCH_SECCOMP
28 select HAVE_DEBUG_KMEMLEAK
29 select HAVE_DMA_CONTIGUOUS
30 select HAVE_DYNAMIC_FTRACE
31 select HAVE_FTRACE_MCOUNT_RECORD
32 select HAVE_FUNCTION_GRAPH_TRACER
33 select HAVE_FUNCTION_TRACER
34 select HAVE_PAGE_SIZE_4KB
35 select HAVE_PCI
36 select IRQ_DOMAIN
37 select XILINX_INTC
38 select MODULES_USE_ELF_RELA
39 select OF
40 select OF_EARLY_FLATTREE
41 select PCI_DOMAINS_GENERIC if PCI
42 select PCI_SYSCALL if PCI
43 select CPU_NO_EFFICIENT_FFS
44 select MMU_GATHER_NO_RANGE
45 select SPARSE_IRQ
46 select ZONE_DMA
47 select TRACE_IRQFLAGS_SUPPORT
48 select GENERIC_IRQ_MULTI_HANDLER
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 ARCH_HAS_ILOG2_U32
67 def_bool n
68
69config ARCH_HAS_ILOG2_U64
70 def_bool n
71
72config GENERIC_HWEIGHT
73 def_bool y
74
75config GENERIC_CALIBRATE_DELAY
76 def_bool y
77
78config GENERIC_CSUM
79 def_bool y
80
81config STACKTRACE_SUPPORT
82 def_bool y
83
84config LOCKDEP_SUPPORT
85 def_bool y
86
87source "arch/microblaze/Kconfig.platform"
88
89menu "Processor type and features"
90
91source "kernel/Kconfig.hz"
92
93config MMU
94 def_bool y
95
96comment "Boot options"
97
98config CMDLINE_BOOL
99 bool "Default bootloader kernel arguments"
100
101config CMDLINE
102 string "Default kernel command string"
103 depends on CMDLINE_BOOL
104 default "console=ttyUL0,115200"
105 help
106 On some architectures there is currently no way for the boot loader
107 to pass arguments to the kernel. For these architectures, you should
108 supply some command-line options at build time by entering them
109 here.
110
111config CMDLINE_FORCE
112 bool "Force default kernel command string"
113 depends on CMDLINE_BOOL
114 default n
115 help
116 Set this to have arguments from the default kernel command string
117 override those passed by the boot loader.
118
119endmenu
120
121menu "Kernel features"
122
123config NR_CPUS
124 int
125 default "1"
126
127config ADVANCED_OPTIONS
128 bool "Prompt for advanced kernel configuration options"
129 help
130 This option will enable prompting for a variety of advanced kernel
131 configuration options. These options can cause the kernel to not
132 work if they are set incorrectly, but can be used to optimize certain
133 aspects of kernel memory management.
134
135 Unless you know what you are doing, say N here.
136
137comment "Default settings for advanced configuration options are used"
138 depends on !ADVANCED_OPTIONS
139
140config HIGHMEM
141 bool "High memory support"
142 select KMAP_LOCAL
143 help
144 The address space of Microblaze processors is only 4 Gigabytes large
145 and it has to accommodate user address space, kernel address
146 space as well as some memory mapped IO. That means that, if you
147 have a large amount of physical memory and/or IO, not all of the
148 memory can be "permanently mapped" by the kernel. The physical
149 memory that is not permanently mapped is called "high memory".
150
151 If unsure, say n.
152
153config LOWMEM_SIZE_BOOL
154 bool "Set maximum low memory"
155 depends on ADVANCED_OPTIONS
156 help
157 This option allows you to set the maximum amount of memory which
158 will be used as "low memory", that is, memory which the kernel can
159 access directly, without having to set up a kernel virtual mapping.
160 This can be useful in optimizing the layout of kernel virtual
161 memory.
162
163 Say N here unless you know what you are doing.
164
165config LOWMEM_SIZE
166 hex "Maximum low memory size (in bytes)" if LOWMEM_SIZE_BOOL
167 default "0x30000000"
168
169config MANUAL_RESET_VECTOR
170 hex "Microblaze reset vector address setup"
171 default "0x0"
172 help
173 Set this option to have the kernel override the CPU Reset vector.
174 If zero, no change will be made to the MicroBlaze reset vector at
175 address 0x0.
176 If non-zero, a jump instruction to this address, will be written
177 to the reset vector at address 0x0.
178 If you are unsure, set it to default value 0x0.
179
180config KERNEL_START_BOOL
181 bool "Set custom kernel base address"
182 depends on ADVANCED_OPTIONS
183 help
184 This option allows you to set the kernel virtual address at which
185 the kernel will map low memory (the kernel image will be linked at
186 this address). This can be useful in optimizing the virtual memory
187 layout of the system.
188
189 Say N here unless you know what you are doing.
190
191config KERNEL_START
192 hex "Virtual address of kernel base" if KERNEL_START_BOOL
193 default "0xc0000000"
194
195config TASK_SIZE_BOOL
196 bool "Set custom user task size"
197 depends on ADVANCED_OPTIONS
198 help
199 This option allows you to set the amount of virtual address space
200 allocated to user tasks. This can be useful in optimizing the
201 virtual memory layout of the system.
202
203 Say N here unless you know what you are doing.
204
205config TASK_SIZE
206 hex "Size of user task space" if TASK_SIZE_BOOL
207 default "0x80000000"
208
209config MB_MANAGER
210 bool "Support for Microblaze Manager"
211 depends on ADVANCED_OPTIONS
212 help
213 This option enables API for configuring the MicroBlaze manager
214 control register, which is consumed by the break handler to
215 block the break.
216
217 Say N here unless you know what you are doing.
218
219endmenu
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"