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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 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"