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_NO_COHERENT_DMA_MMAP if !MMU
   6         select ARCH_WANT_IPC_PARSE_VERSION
   7         select BUILDTIME_EXTABLE_SORT
   8         select TIMER_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_HASH
  20         select HAVE_ARCH_KGDB
  21         select HAVE_DEBUG_KMEMLEAK
  22         select HAVE_DMA_API_DEBUG
  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 XILINX_INTC
  32         select MODULES_USE_ELF_RELA
  33         select OF
  34         select OF_EARLY_FLATTREE
  35         select TRACING_SUPPORT
  36         select VIRT_TO_BUS
  37         select CPU_NO_EFFICIENT_FFS
  38
  39 # Endianness selection
  40 choice
  41         prompt "Endianness selection"
  42         default CPU_LITTLE_ENDIAN
  43         help
  44           microblaze architectures can be configured for either little or
  45           big endian formats. Be sure to select the appropriate mode.
  46
  47 config CPU_BIG_ENDIAN
  48         bool "Big endian"
  49
  50 config CPU_LITTLE_ENDIAN
  51         bool "Little endian"
  52
  53 endchoice
  54
  55 config SWAP
  56         def_bool n
  57
  58 config RWSEM_GENERIC_SPINLOCK
  59         def_bool y
  60
  61 config ZONE_DMA
  62         def_bool y
  63
  64 config RWSEM_XCHGADD_ALGORITHM
  65         bool
  66
  67 config ARCH_HAS_ILOG2_U32
  68         def_bool n
  69
  70 config ARCH_HAS_ILOG2_U64
  71         def_bool n
  72
  73 config GENERIC_HWEIGHT
  74         def_bool y
  75
  76 config GENERIC_CALIBRATE_DELAY
  77         def_bool y
  78
  79 config GENERIC_CSUM
  80         def_bool y
  81
  82 config STACKTRACE_SUPPORT
  83         def_bool y
  84
  85 config LOCKDEP_SUPPORT
  86         def_bool y
  87
  88 source "init/Kconfig"
  89
  90 source "kernel/Kconfig.freezer"
  91
  92 source "arch/microblaze/Kconfig.platform"
  93
  94 menu "Processor type and features"
  95
  96 source "kernel/Kconfig.preempt"
  97
  98 source "kernel/Kconfig.hz"
  99
 100 config MMU
 101         bool "MMU support"
 102         default n
 103
 104 comment "Boot options"
 105
 106 config CMDLINE_BOOL
 107         bool "Default bootloader kernel arguments"
 108
 109 config CMDLINE
 110         string "Default kernel command string"
 111         depends on CMDLINE_BOOL
 112         default "console=ttyUL0,115200"
 113         help
 114           On some architectures there is currently no way for the boot loader
 115           to pass arguments to the kernel. For these architectures, you should
 116           supply some command-line options at build time by entering them
 117           here.
 118
 119 config CMDLINE_FORCE
 120         bool "Force default kernel command string"
 121         depends on CMDLINE_BOOL
 122         default n
 123         help
 124           Set this to have arguments from the default kernel command string
 125           override those passed by the boot loader.
 126
 127 config SECCOMP
 128         bool "Enable seccomp to safely compute untrusted bytecode"
 129         depends on PROC_FS
 130         default y
 131         help
 132           This kernel feature is useful for number crunching applications
 133           that may need to compute untrusted bytecode during their
 134           execution. By using pipes or other transports made available to
 135           the process as file descriptors supporting the read/write
 136           syscalls, it's possible to isolate those applications in
 137           their own address space using seccomp. Once seccomp is
 138           enabled via /proc/<pid>/seccomp, it cannot be disabled
 139           and the task is only allowed to execute a few safe syscalls
 140           defined by each seccomp mode.
 141
 142           If unsure, say Y. Only embedded should say N here.
 143
 144 endmenu
 145
 146 menu "Kernel features"
 147
 148 config NR_CPUS
 149         int
 150         default "1"
 151
 152 config ADVANCED_OPTIONS
 153         bool "Prompt for advanced kernel configuration options"
 154         help
 155           This option will enable prompting for a variety of advanced kernel
 156           configuration options.  These options can cause the kernel to not
 157           work if they are set incorrectly, but can be used to optimize certain
 158           aspects of kernel memory management.
 159
 160           Unless you know what you are doing, say N here.
 161
 162 comment "Default settings for advanced configuration options are used"
 163         depends on !ADVANCED_OPTIONS
 164
 165 config XILINX_UNCACHED_SHADOW
 166         bool "Are you using uncached shadow for RAM ?"
 167         depends on ADVANCED_OPTIONS && !MMU
 168         default n
 169         help
 170           This is needed to be able to allocate uncachable memory regions.
 171           The feature requires the design to define the RAM memory controller
 172           window to be twice as large as the actual physical memory.
 173
 174 config HIGHMEM
 175         bool "High memory support"
 176         depends on MMU
 177         help
 178           The address space of Microblaze processors is only 4 Gigabytes large
 179           and it has to accommodate user address space, kernel address
 180           space as well as some memory mapped IO. That means that, if you
 181           have a large amount of physical memory and/or IO, not all of the
 182           memory can be "permanently mapped" by the kernel. The physical
 183           memory that is not permanently mapped is called "high memory".
 184
 185           If unsure, say n.
 186
 187 config LOWMEM_SIZE_BOOL
 188         bool "Set maximum low memory"
 189         depends on ADVANCED_OPTIONS && MMU
 190         help
 191           This option allows you to set the maximum amount of memory which
 192           will be used as "low memory", that is, memory which the kernel can
 193           access directly, without having to set up a kernel virtual mapping.
 194           This can be useful in optimizing the layout of kernel virtual
 195           memory.
 196
 197           Say N here unless you know what you are doing.
 198
 199 config LOWMEM_SIZE
 200         hex "Maximum low memory size (in bytes)" if LOWMEM_SIZE_BOOL
 201         default "0x30000000"
 202
 203 config MANUAL_RESET_VECTOR
 204         hex "Microblaze reset vector address setup"
 205         default "0x0"
 206         help
 207           Set this option to have the kernel override the CPU Reset vector.
 208           If zero, no change will be made to the MicroBlaze reset vector at
 209           address 0x0.
 210           If non-zero, a jump instruction to this address, will be written
 211           to the reset vector at address 0x0.
 212           If you are unsure, set it to default value 0x0.
 213
 214 config KERNEL_START_BOOL
 215         bool "Set custom kernel base address"
 216         depends on ADVANCED_OPTIONS
 217         help
 218           This option allows you to set the kernel virtual address at which
 219           the kernel will map low memory (the kernel image will be linked at
 220           this address).  This can be useful in optimizing the virtual memory
 221           layout of the system.
 222
 223           Say N here unless you know what you are doing.
 224
 225 config KERNEL_START
 226         hex "Virtual address of kernel base" if KERNEL_START_BOOL
 227         default "0xc0000000" if MMU
 228         default KERNEL_BASE_ADDR if !MMU
 229
 230 config TASK_SIZE_BOOL
 231         bool "Set custom user task size"
 232         depends on ADVANCED_OPTIONS && MMU
 233         help
 234           This option allows you to set the amount of virtual address space
 235           allocated to user tasks.  This can be useful in optimizing the
 236           virtual memory layout of the system.
 237
 238           Say N here unless you know what you are doing.
 239
 240 config TASK_SIZE
 241         hex "Size of user task space" if TASK_SIZE_BOOL
 242         default "0x80000000"
 243
 244 choice
 245         prompt "Page size"
 246         default MICROBLAZE_4K_PAGES
 247         depends on ADVANCED_OPTIONS && !MMU
 248         help
 249           Select the kernel logical page size. Increasing the page size
 250           will reduce software overhead at each page boundary, allow
 251           hardware prefetch mechanisms to be more effective, and allow
 252           larger dma transfers increasing IO efficiency and reducing
 253           overhead. However the utilization of memory will increase.
 254           For example, each cached file will using a multiple of the
 255           page size to hold its contents and the difference between the
 256           end of file and the end of page is wasted.
 257
 258           If unsure, choose 4K_PAGES.
 259
 260 config MICROBLAZE_4K_PAGES
 261         bool "4k page size"
 262
 263 config MICROBLAZE_16K_PAGES
 264         bool "16k page size"
 265
 266 config MICROBLAZE_64K_PAGES
 267         bool "64k page size"
 268
 269 endchoice
 270
 271 source "mm/Kconfig"
 272
 273 endmenu
 274
 275 menu "Executable file formats"
 276
 277 source "fs/Kconfig.binfmt"
 278
 279 endmenu
 280
 281 menu "Bus Options"
 282
 283 config PCI
 284         bool "PCI support"
 285
 286 config PCI_DOMAINS
 287         def_bool PCI
 288
 289 config PCI_DOMAINS_GENERIC
 290         def_bool PCI_DOMAINS
 291
 292 config PCI_SYSCALL
 293         def_bool PCI
 294
 295 config PCI_XILINX
 296         bool "Xilinx PCI host bridge support"
 297         depends on PCI
 298
 299 source "drivers/pci/Kconfig"
 300
 301 endmenu
 302
 303 source "net/Kconfig"
 304
 305 source "drivers/Kconfig"
 306
 307 source "fs/Kconfig"
 308
 309 source "arch/microblaze/Kconfig.debug"
 310
 311 source "security/Kconfig"
 312
 313 source "crypto/Kconfig"
 314
 315 source "lib/Kconfig"