Commit | Line | Data |
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ec8f24b7 | 1 | # SPDX-License-Identifier: GPL-2.0-only |
575ca288 MS |
2 | config MICROBLAZE |
3 | def_bool y | |
942fa985 | 4 | select ARCH_32BIT_OFF_T |
17c46a6a | 5 | select ARCH_NO_SWAP |
aef0f78e | 6 | select ARCH_HAS_BINFMT_FLAT if !MMU |
58b04406 | 7 | select ARCH_HAS_DMA_COHERENT_TO_PFN if MMU |
957e3fac | 8 | select ARCH_HAS_GCOV_PROFILE_ALL |
5411ad27 CH |
9 | select ARCH_HAS_SYNC_DMA_FOR_CPU |
10 | select ARCH_HAS_SYNC_DMA_FOR_DEVICE | |
355f65a3 | 11 | select ARCH_MIGHT_HAVE_PC_PARPORT |
07c75d7a | 12 | select ARCH_NO_COHERENT_DMA_MMAP if !MMU |
c1d7e01d | 13 | select ARCH_WANT_IPC_PARSE_VERSION |
25213388 | 14 | select BUILDTIME_EXTABLE_SORT |
bb0eb050 | 15 | select TIMER_OF |
25213388 MS |
16 | select CLONE_BACKWARDS3 |
17 | select COMMON_CLK | |
18 | select GENERIC_ATOMIC64 | |
19 | select GENERIC_CLOCKEVENTS | |
20 | select GENERIC_CPU_DEVICES | |
21 | select GENERIC_IDLE_POLL_SETUP | |
b6e31629 | 22 | select GENERIC_IRQ_PROBE |
9d61c18b | 23 | select GENERIC_IRQ_SHOW |
1b34d160 | 24 | select GENERIC_PCI_IOMAP |
839396ab | 25 | select GENERIC_SCHED_CLOCK |
7b13277b | 26 | select HAVE_ARCH_HASH |
25213388 MS |
27 | select HAVE_ARCH_KGDB |
28 | select HAVE_DEBUG_KMEMLEAK | |
25213388 MS |
29 | select HAVE_DYNAMIC_FTRACE |
30 | select HAVE_FTRACE_MCOUNT_RECORD | |
31 | select HAVE_FUNCTION_GRAPH_TRACER | |
25213388 | 32 | select HAVE_FUNCTION_TRACER |
25213388 MS |
33 | select HAVE_MEMBLOCK_NODE_MAP |
34 | select HAVE_OPROFILE | |
eb01d42a | 35 | select HAVE_PCI |
25213388 | 36 | select IRQ_DOMAIN |
0547dc78 | 37 | select XILINX_INTC |
786d35d4 | 38 | select MODULES_USE_ELF_RELA |
25213388 MS |
39 | select OF |
40 | select OF_EARLY_FLATTREE | |
2eac9c2d | 41 | select PCI_DOMAINS_GENERIC if PCI |
20f1b79d | 42 | select PCI_SYSCALL if PCI |
25213388 MS |
43 | select TRACING_SUPPORT |
44 | select VIRT_TO_BUS | |
fff7fb0b | 45 | select CPU_NO_EFFICIENT_FFS |
6137fed0 | 46 | select MMU_GATHER_NO_RANGE if MMU |
575ca288 | 47 | |
206d3642 BM |
48 | # Endianness selection |
49 | choice | |
50 | prompt "Endianness selection" | |
428dbf15 | 51 | default CPU_LITTLE_ENDIAN |
206d3642 BM |
52 | help |
53 | microblaze architectures can be configured for either little or | |
54 | big endian formats. Be sure to select the appropriate mode. | |
55 | ||
56 | config CPU_BIG_ENDIAN | |
57 | bool "Big endian" | |
58 | ||
59 | config CPU_LITTLE_ENDIAN | |
60 | bool "Little endian" | |
61 | ||
62 | endchoice | |
63 | ||
4e2e4124 MS |
64 | config ZONE_DMA |
65 | def_bool y | |
66 | ||
575ca288 MS |
67 | config ARCH_HAS_ILOG2_U32 |
68 | def_bool n | |
69 | ||
70 | config ARCH_HAS_ILOG2_U64 | |
71 | def_bool n | |
72 | ||
575ca288 MS |
73 | config GENERIC_HWEIGHT |
74 | def_bool y | |
75 | ||
575ca288 MS |
76 | config GENERIC_CALIBRATE_DELAY |
77 | def_bool y | |
78 | ||
14f87389 RLB |
79 | config GENERIC_CSUM |
80 | def_bool y | |
81 | ||
24b45a12 MS |
82 | config STACKTRACE_SUPPORT |
83 | def_bool y | |
84 | ||
bf2d8096 MS |
85 | config LOCKDEP_SUPPORT |
86 | def_bool y | |
87 | ||
c24cf712 | 88 | source "arch/microblaze/Kconfig.platform" |
575ca288 MS |
89 | |
90 | menu "Processor type and features" | |
91 | ||
575ca288 MS |
92 | source "kernel/Kconfig.hz" |
93 | ||
94 | config MMU | |
a116f6d5 MS |
95 | bool "MMU support" |
96 | default n | |
575ca288 | 97 | |
575ca288 MS |
98 | comment "Boot options" |
99 | ||
100 | config CMDLINE_BOOL | |
101 | bool "Default bootloader kernel arguments" | |
102 | ||
103 | config CMDLINE | |
104 | string "Default kernel command string" | |
105 | depends on CMDLINE_BOOL | |
106 | default "console=ttyUL0,115200" | |
107 | help | |
108 | On some architectures there is currently no way for the boot loader | |
109 | to pass arguments to the kernel. For these architectures, you should | |
110 | supply some command-line options at build time by entering them | |
111 | here. | |
112 | ||
113 | config CMDLINE_FORCE | |
114 | bool "Force default kernel command string" | |
115 | depends on CMDLINE_BOOL | |
116 | default n | |
117 | help | |
118 | Set this to have arguments from the default kernel command string | |
119 | override those passed by the boot loader. | |
120 | ||
68c6ac33 MS |
121 | config SECCOMP |
122 | bool "Enable seccomp to safely compute untrusted bytecode" | |
123 | depends on PROC_FS | |
124 | default y | |
125 | help | |
126 | This kernel feature is useful for number crunching applications | |
127 | that may need to compute untrusted bytecode during their | |
128 | execution. By using pipes or other transports made available to | |
129 | the process as file descriptors supporting the read/write | |
130 | syscalls, it's possible to isolate those applications in | |
131 | their own address space using seccomp. Once seccomp is | |
132 | enabled via /proc/<pid>/seccomp, it cannot be disabled | |
133 | and the task is only allowed to execute a few safe syscalls | |
134 | defined by each seccomp mode. | |
135 | ||
136 | If unsure, say Y. Only embedded should say N here. | |
137 | ||
575ca288 MS |
138 | endmenu |
139 | ||
b408e2c2 | 140 | menu "Kernel features" |
a116f6d5 | 141 | |
4cbbbb43 MS |
142 | config NR_CPUS |
143 | int | |
144 | default "1" | |
145 | ||
a116f6d5 MS |
146 | config ADVANCED_OPTIONS |
147 | bool "Prompt for advanced kernel configuration options" | |
a116f6d5 MS |
148 | help |
149 | This option will enable prompting for a variety of advanced kernel | |
150 | configuration options. These options can cause the kernel to not | |
151 | work if they are set incorrectly, but can be used to optimize certain | |
152 | aspects of kernel memory management. | |
153 | ||
154 | Unless you know what you are doing, say N here. | |
155 | ||
156 | comment "Default settings for advanced configuration options are used" | |
157 | depends on !ADVANCED_OPTIONS | |
158 | ||
3a0d7a4d MS |
159 | config XILINX_UNCACHED_SHADOW |
160 | bool "Are you using uncached shadow for RAM ?" | |
161 | depends on ADVANCED_OPTIONS && !MMU | |
162 | default n | |
163 | help | |
164 | This is needed to be able to allocate uncachable memory regions. | |
165 | The feature requires the design to define the RAM memory controller | |
166 | window to be twice as large as the actual physical memory. | |
167 | ||
2f2f371f MS |
168 | config HIGHMEM |
169 | bool "High memory support" | |
a116f6d5 | 170 | depends on MMU |
a116f6d5 | 171 | help |
2f2f371f MS |
172 | The address space of Microblaze processors is only 4 Gigabytes large |
173 | and it has to accommodate user address space, kernel address | |
174 | space as well as some memory mapped IO. That means that, if you | |
175 | have a large amount of physical memory and/or IO, not all of the | |
176 | memory can be "permanently mapped" by the kernel. The physical | |
177 | memory that is not permanently mapped is called "high memory". | |
a116f6d5 | 178 | |
2f2f371f | 179 | If unsure, say n. |
a116f6d5 MS |
180 | |
181 | config LOWMEM_SIZE_BOOL | |
182 | bool "Set maximum low memory" | |
b8a84059 | 183 | depends on ADVANCED_OPTIONS && MMU |
a116f6d5 MS |
184 | help |
185 | This option allows you to set the maximum amount of memory which | |
186 | will be used as "low memory", that is, memory which the kernel can | |
187 | access directly, without having to set up a kernel virtual mapping. | |
188 | This can be useful in optimizing the layout of kernel virtual | |
189 | memory. | |
190 | ||
191 | Say N here unless you know what you are doing. | |
192 | ||
193 | config LOWMEM_SIZE | |
194 | hex "Maximum low memory size (in bytes)" if LOWMEM_SIZE_BOOL | |
a116f6d5 MS |
195 | default "0x30000000" |
196 | ||
0b9b0200 MS |
197 | config MANUAL_RESET_VECTOR |
198 | hex "Microblaze reset vector address setup" | |
199 | default "0x0" | |
200 | help | |
201 | Set this option to have the kernel override the CPU Reset vector. | |
202 | If zero, no change will be made to the MicroBlaze reset vector at | |
203 | address 0x0. | |
204 | If non-zero, a jump instruction to this address, will be written | |
205 | to the reset vector at address 0x0. | |
206 | If you are unsure, set it to default value 0x0. | |
207 | ||
a116f6d5 MS |
208 | config KERNEL_START_BOOL |
209 | bool "Set custom kernel base address" | |
210 | depends on ADVANCED_OPTIONS | |
211 | help | |
212 | This option allows you to set the kernel virtual address at which | |
213 | the kernel will map low memory (the kernel image will be linked at | |
214 | this address). This can be useful in optimizing the virtual memory | |
215 | layout of the system. | |
216 | ||
217 | Say N here unless you know what you are doing. | |
218 | ||
219 | config KERNEL_START | |
220 | hex "Virtual address of kernel base" if KERNEL_START_BOOL | |
221 | default "0xc0000000" if MMU | |
222 | default KERNEL_BASE_ADDR if !MMU | |
223 | ||
224 | config TASK_SIZE_BOOL | |
225 | bool "Set custom user task size" | |
b8a84059 | 226 | depends on ADVANCED_OPTIONS && MMU |
a116f6d5 MS |
227 | help |
228 | This option allows you to set the amount of virtual address space | |
229 | allocated to user tasks. This can be useful in optimizing the | |
230 | virtual memory layout of the system. | |
231 | ||
232 | Say N here unless you know what you are doing. | |
233 | ||
234 | config TASK_SIZE | |
235 | hex "Size of user task space" if TASK_SIZE_BOOL | |
a116f6d5 MS |
236 | default "0x80000000" |
237 | ||
ba9c4f88 SM |
238 | choice |
239 | prompt "Page size" | |
240 | default MICROBLAZE_4K_PAGES | |
241 | depends on ADVANCED_OPTIONS && !MMU | |
242 | help | |
243 | Select the kernel logical page size. Increasing the page size | |
244 | will reduce software overhead at each page boundary, allow | |
245 | hardware prefetch mechanisms to be more effective, and allow | |
246 | larger dma transfers increasing IO efficiency and reducing | |
247 | overhead. However the utilization of memory will increase. | |
248 | For example, each cached file will using a multiple of the | |
249 | page size to hold its contents and the difference between the | |
250 | end of file and the end of page is wasted. | |
251 | ||
252 | If unsure, choose 4K_PAGES. | |
253 | ||
254 | config MICROBLAZE_4K_PAGES | |
255 | bool "4k page size" | |
256 | ||
ba9c4f88 SM |
257 | config MICROBLAZE_16K_PAGES |
258 | bool "16k page size" | |
259 | ||
6e80cff5 MS |
260 | config MICROBLAZE_64K_PAGES |
261 | bool "64k page size" | |
ba9c4f88 SM |
262 | |
263 | endchoice | |
264 | ||
575ca288 MS |
265 | endmenu |
266 | ||
a6475c13 MS |
267 | menu "Bus Options" |
268 | ||
733cc218 MS |
269 | config PCI_XILINX |
270 | bool "Xilinx PCI host bridge support" | |
271 | depends on PCI | |
272 | ||
a6475c13 | 273 | endmenu |