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