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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 BUILDTIME_EXTABLE_SORT
7 select CLKSRC_OF
8 select CLONE_BACKWARDS3
9 select COMMON_CLK
10 select GENERIC_ATOMIC64
11 select GENERIC_CLOCKEVENTS
12 select GENERIC_CPU_DEVICES
13 select GENERIC_IDLE_POLL_SETUP
14 select GENERIC_IRQ_PROBE
15 select GENERIC_IRQ_SHOW
16 select GENERIC_PCI_IOMAP
17 select GENERIC_SCHED_CLOCK
18 select HAVE_ARCH_HASH
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 XILINX_INTC
31 select MODULES_USE_ELF_RELA
32 select OF
33 select OF_EARLY_FLATTREE
34 select TRACING_SUPPORT
35 select VIRT_TO_BUS
36 select CPU_NO_EFFICIENT_FFS
37
38config SWAP
39 def_bool n
40
41config RWSEM_GENERIC_SPINLOCK
42 def_bool y
43
44config ZONE_DMA
45 def_bool y
46
47config RWSEM_XCHGADD_ALGORITHM
48 bool
49
50config ARCH_HAS_ILOG2_U32
51 def_bool n
52
53config ARCH_HAS_ILOG2_U64
54 def_bool n
55
56config GENERIC_HWEIGHT
57 def_bool y
58
59config GENERIC_CALIBRATE_DELAY
60 def_bool y
61
62config GENERIC_CSUM
63 def_bool y
64
65config STACKTRACE_SUPPORT
66 def_bool y
67
68config LOCKDEP_SUPPORT
69 def_bool y
70
71source "init/Kconfig"
72
73source "kernel/Kconfig.freezer"
74
75source "arch/microblaze/Kconfig.platform"
76
77menu "Processor type and features"
78
79source "kernel/Kconfig.preempt"
80
81source "kernel/Kconfig.hz"
82
83config MMU
84 bool "MMU support"
85 default n
86
87comment "Boot options"
88
89config CMDLINE_BOOL
90 bool "Default bootloader kernel arguments"
91
92config CMDLINE
93 string "Default kernel command string"
94 depends on CMDLINE_BOOL
95 default "console=ttyUL0,115200"
96 help
97 On some architectures there is currently no way for the boot loader
98 to pass arguments to the kernel. For these architectures, you should
99 supply some command-line options at build time by entering them
100 here.
101
102config CMDLINE_FORCE
103 bool "Force default kernel command string"
104 depends on CMDLINE_BOOL
105 default n
106 help
107 Set this to have arguments from the default kernel command string
108 override those passed by the boot loader.
109
110config SECCOMP
111 bool "Enable seccomp to safely compute untrusted bytecode"
112 depends on PROC_FS
113 default y
114 help
115 This kernel feature is useful for number crunching applications
116 that may need to compute untrusted bytecode during their
117 execution. By using pipes or other transports made available to
118 the process as file descriptors supporting the read/write
119 syscalls, it's possible to isolate those applications in
120 their own address space using seccomp. Once seccomp is
121 enabled via /proc/<pid>/seccomp, it cannot be disabled
122 and the task is only allowed to execute a few safe syscalls
123 defined by each seccomp mode.
124
125 If unsure, say Y. Only embedded should say N here.
126
127endmenu
128
129menu "Kernel features"
130
131config NR_CPUS
132 int
133 default "1"
134
135config ADVANCED_OPTIONS
136 bool "Prompt for advanced kernel configuration options"
137 help
138 This option will enable prompting for a variety of advanced kernel
139 configuration options. These options can cause the kernel to not
140 work if they are set incorrectly, but can be used to optimize certain
141 aspects of kernel memory management.
142
143 Unless you know what you are doing, say N here.
144
145comment "Default settings for advanced configuration options are used"
146 depends on !ADVANCED_OPTIONS
147
148config XILINX_UNCACHED_SHADOW
149 bool "Are you using uncached shadow for RAM ?"
150 depends on ADVANCED_OPTIONS && !MMU
151 default n
152 help
153 This is needed to be able to allocate uncachable memory regions.
154 The feature requires the design to define the RAM memory controller
155 window to be twice as large as the actual physical memory.
156
157config HIGHMEM
158 bool "High memory support"
159 depends on MMU
160 help
161 The address space of Microblaze processors is only 4 Gigabytes large
162 and it has to accommodate user address space, kernel address
163 space as well as some memory mapped IO. That means that, if you
164 have a large amount of physical memory and/or IO, not all of the
165 memory can be "permanently mapped" by the kernel. The physical
166 memory that is not permanently mapped is called "high memory".
167
168 If unsure, say n.
169
170config LOWMEM_SIZE_BOOL
171 bool "Set maximum low memory"
172 depends on ADVANCED_OPTIONS && MMU
173 help
174 This option allows you to set the maximum amount of memory which
175 will be used as "low memory", that is, memory which the kernel can
176 access directly, without having to set up a kernel virtual mapping.
177 This can be useful in optimizing the layout of kernel virtual
178 memory.
179
180 Say N here unless you know what you are doing.
181
182config LOWMEM_SIZE
183 hex "Maximum low memory size (in bytes)" if LOWMEM_SIZE_BOOL
184 default "0x30000000"
185
186config MANUAL_RESET_VECTOR
187 hex "Microblaze reset vector address setup"
188 default "0x0"
189 help
190 Set this option to have the kernel override the CPU Reset vector.
191 If zero, no change will be made to the MicroBlaze reset vector at
192 address 0x0.
193 If non-zero, a jump instruction to this address, will be written
194 to the reset vector at address 0x0.
195 If you are unsure, set it to default value 0x0.
196
197config KERNEL_START_BOOL
198 bool "Set custom kernel base address"
199 depends on ADVANCED_OPTIONS
200 help
201 This option allows you to set the kernel virtual address at which
202 the kernel will map low memory (the kernel image will be linked at
203 this address). This can be useful in optimizing the virtual memory
204 layout of the system.
205
206 Say N here unless you know what you are doing.
207
208config KERNEL_START
209 hex "Virtual address of kernel base" if KERNEL_START_BOOL
210 default "0xc0000000" if MMU
211 default KERNEL_BASE_ADDR if !MMU
212
213config TASK_SIZE_BOOL
214 bool "Set custom user task size"
215 depends on ADVANCED_OPTIONS && MMU
216 help
217 This option allows you to set the amount of virtual address space
218 allocated to user tasks. This can be useful in optimizing the
219 virtual memory layout of the system.
220
221 Say N here unless you know what you are doing.
222
223config TASK_SIZE
224 hex "Size of user task space" if TASK_SIZE_BOOL
225 default "0x80000000"
226
227choice
228 prompt "Page size"
229 default MICROBLAZE_4K_PAGES
230 depends on ADVANCED_OPTIONS && !MMU
231 help
232 Select the kernel logical page size. Increasing the page size
233 will reduce software overhead at each page boundary, allow
234 hardware prefetch mechanisms to be more effective, and allow
235 larger dma transfers increasing IO efficiency and reducing
236 overhead. However the utilization of memory will increase.
237 For example, each cached file will using a multiple of the
238 page size to hold its contents and the difference between the
239 end of file and the end of page is wasted.
240
241 If unsure, choose 4K_PAGES.
242
243config MICROBLAZE_4K_PAGES
244 bool "4k page size"
245
246config MICROBLAZE_16K_PAGES
247 bool "16k page size"
248
249config MICROBLAZE_64K_PAGES
250 bool "64k page size"
251
252endchoice
253
254source "mm/Kconfig"
255
256endmenu
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_DOMAINS_GENERIC
273 def_bool PCI_DOMAINS
274
275config PCI_SYSCALL
276 def_bool PCI
277
278config PCI_XILINX
279 bool "Xilinx PCI host bridge support"
280 depends on PCI
281
282source "drivers/pci/Kconfig"
283
284endmenu
285
286source "net/Kconfig"
287
288source "drivers/Kconfig"
289
290source "fs/Kconfig"
291
292source "arch/microblaze/Kconfig.debug"
293
294source "security/Kconfig"
295
296source "crypto/Kconfig"
297
298source "lib/Kconfig"