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Linux/arch/microblaze/Kconfig

  1 config 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_DMA_ATTRS
 23         select HAVE_DYNAMIC_FTRACE
 24         select HAVE_FTRACE_MCOUNT_RECORD
 25         select HAVE_FUNCTION_GRAPH_TRACER
 26         select HAVE_FUNCTION_TRACER
 27         select HAVE_MEMBLOCK
 28         select HAVE_MEMBLOCK_NODE_MAP
 29         select HAVE_OPROFILE
 30         select IRQ_DOMAIN
 31         select MODULES_USE_ELF_RELA
 32         select OF
 33         select OF_EARLY_FLATTREE
 34         select TRACING_SUPPORT
 35         select VIRT_TO_BUS
 36 
 37 config SWAP
 38         def_bool n
 39 
 40 config RWSEM_GENERIC_SPINLOCK
 41         def_bool y
 42 
 43 config ZONE_DMA
 44         def_bool y
 45 
 46 config RWSEM_XCHGADD_ALGORITHM
 47         bool
 48 
 49 config ARCH_HAS_ILOG2_U32
 50         def_bool n
 51 
 52 config ARCH_HAS_ILOG2_U64
 53         def_bool n
 54 
 55 config GENERIC_HWEIGHT
 56         def_bool y
 57 
 58 config GENERIC_CALIBRATE_DELAY
 59         def_bool y
 60 
 61 config GENERIC_CSUM
 62         def_bool y
 63 
 64 config STACKTRACE_SUPPORT
 65         def_bool y
 66 
 67 config LOCKDEP_SUPPORT
 68         def_bool y
 69 
 70 config HAVE_LATENCYTOP_SUPPORT
 71         def_bool y
 72 
 73 source "init/Kconfig"
 74 
 75 source "kernel/Kconfig.freezer"
 76 
 77 source "arch/microblaze/Kconfig.platform"
 78 
 79 menu "Processor type and features"
 80 
 81 source "kernel/Kconfig.preempt"
 82 
 83 source "kernel/Kconfig.hz"
 84 
 85 config MMU
 86         bool "MMU support"
 87         default n
 88 
 89 comment "Boot options"
 90 
 91 config CMDLINE_BOOL
 92         bool "Default bootloader kernel arguments"
 93 
 94 config CMDLINE
 95         string "Default kernel command string"
 96         depends on CMDLINE_BOOL
 97         default "console=ttyUL0,115200"
 98         help
 99           On some architectures there is currently no way for the boot loader
100           to pass arguments to the kernel. For these architectures, you should
101           supply some command-line options at build time by entering them
102           here.
103 
104 config CMDLINE_FORCE
105         bool "Force default kernel command string"
106         depends on CMDLINE_BOOL
107         default n
108         help
109           Set this to have arguments from the default kernel command string
110           override those passed by the boot loader.
111 
112 config SECCOMP
113         bool "Enable seccomp to safely compute untrusted bytecode"
114         depends on PROC_FS
115         default y
116         help
117           This kernel feature is useful for number crunching applications
118           that may need to compute untrusted bytecode during their
119           execution. By using pipes or other transports made available to
120           the process as file descriptors supporting the read/write
121           syscalls, it's possible to isolate those applications in
122           their own address space using seccomp. Once seccomp is
123           enabled via /proc/<pid>/seccomp, it cannot be disabled
124           and the task is only allowed to execute a few safe syscalls
125           defined by each seccomp mode.
126 
127           If unsure, say Y. Only embedded should say N here.
128 
129 endmenu
130 
131 menu "Kernel features"
132 
133 config NR_CPUS
134         int
135         default "1"
136 
137 config ADVANCED_OPTIONS
138         bool "Prompt for advanced kernel configuration options"
139         help
140           This option will enable prompting for a variety of advanced kernel
141           configuration options.  These options can cause the kernel to not
142           work if they are set incorrectly, but can be used to optimize certain
143           aspects of kernel memory management.
144 
145           Unless you know what you are doing, say N here.
146 
147 comment "Default settings for advanced configuration options are used"
148         depends on !ADVANCED_OPTIONS
149 
150 config XILINX_UNCACHED_SHADOW
151         bool "Are you using uncached shadow for RAM ?"
152         depends on ADVANCED_OPTIONS && !MMU
153         default n
154         help
155           This is needed to be able to allocate uncachable memory regions.
156           The feature requires the design to define the RAM memory controller
157           window to be twice as large as the actual physical memory.
158 
159 config HIGHMEM
160         bool "High memory support"
161         depends on MMU
162         help
163           The address space of Microblaze processors is only 4 Gigabytes large
164           and it has to accommodate user address space, kernel address
165           space as well as some memory mapped IO. That means that, if you
166           have a large amount of physical memory and/or IO, not all of the
167           memory can be "permanently mapped" by the kernel. The physical
168           memory that is not permanently mapped is called "high memory".
169 
170           If unsure, say n.
171 
172 config LOWMEM_SIZE_BOOL
173         bool "Set maximum low memory"
174         depends on ADVANCED_OPTIONS && MMU
175         help
176           This option allows you to set the maximum amount of memory which
177           will be used as "low memory", that is, memory which the kernel can
178           access directly, without having to set up a kernel virtual mapping.
179           This can be useful in optimizing the layout of kernel virtual
180           memory.
181 
182           Say N here unless you know what you are doing.
183 
184 config LOWMEM_SIZE
185         hex "Maximum low memory size (in bytes)" if LOWMEM_SIZE_BOOL
186         default "0x30000000"
187 
188 config MANUAL_RESET_VECTOR
189         hex "Microblaze reset vector address setup"
190         default "0x0"
191         help
192           Set this option to have the kernel override the CPU Reset vector.
193           If zero, no change will be made to the MicroBlaze reset vector at
194           address 0x0.
195           If non-zero, a jump instruction to this address, will be written
196           to the reset vector at address 0x0.
197           If you are unsure, set it to default value 0x0.
198 
199 config KERNEL_START_BOOL
200         bool "Set custom kernel base address"
201         depends on ADVANCED_OPTIONS
202         help
203           This option allows you to set the kernel virtual address at which
204           the kernel will map low memory (the kernel image will be linked at
205           this address).  This can be useful in optimizing the virtual memory
206           layout of the system.
207 
208           Say N here unless you know what you are doing.
209 
210 config KERNEL_START
211         hex "Virtual address of kernel base" if KERNEL_START_BOOL
212         default "0xc0000000" if MMU
213         default KERNEL_BASE_ADDR if !MMU
214 
215 config TASK_SIZE_BOOL
216         bool "Set custom user task size"
217         depends on ADVANCED_OPTIONS && MMU
218         help
219           This option allows you to set the amount of virtual address space
220           allocated to user tasks.  This can be useful in optimizing the
221           virtual memory layout of the system.
222 
223           Say N here unless you know what you are doing.
224 
225 config TASK_SIZE
226         hex "Size of user task space" if TASK_SIZE_BOOL
227         default "0x80000000"
228 
229 choice
230         prompt "Page size"
231         default MICROBLAZE_4K_PAGES
232         depends on ADVANCED_OPTIONS && !MMU
233         help
234           Select the kernel logical page size. Increasing the page size
235           will reduce software overhead at each page boundary, allow
236           hardware prefetch mechanisms to be more effective, and allow
237           larger dma transfers increasing IO efficiency and reducing
238           overhead. However the utilization of memory will increase.
239           For example, each cached file will using a multiple of the
240           page size to hold its contents and the difference between the
241           end of file and the end of page is wasted.
242 
243           If unsure, choose 4K_PAGES.
244 
245 config MICROBLAZE_4K_PAGES
246         bool "4k page size"
247 
248 config MICROBLAZE_16K_PAGES
249         bool "16k page size"
250 
251 config MICROBLAZE_64K_PAGES
252         bool "64k page size"
253 
254 endchoice
255 
256 source "mm/Kconfig"
257 
258 endmenu
259 
260 menu "Executable file formats"
261 
262 source "fs/Kconfig.binfmt"
263 
264 endmenu
265 
266 menu "Bus Options"
267 
268 config PCI
269         bool "PCI support"
270 
271 config PCI_DOMAINS
272         def_bool PCI
273 
274 config PCI_SYSCALL
275         def_bool PCI
276 
277 config PCI_XILINX
278         bool "Xilinx PCI host bridge support"
279         depends on PCI
280 
281 source "drivers/pci/Kconfig"
282 
283 endmenu
284 
285 source "net/Kconfig"
286 
287 source "drivers/Kconfig"
288 
289 source "fs/Kconfig"
290 
291 source "arch/microblaze/Kconfig.debug"
292 
293 source "security/Kconfig"
294 
295 source "crypto/Kconfig"
296 
297 source "lib/Kconfig"

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