arch/microblaze/Kconfig

   1 config MICROBLAZE
   2         def_bool y
   3         select ARCH_NO_SWAP
   4         select ARCH_HAS_GCOV_PROFILE_ALL
   5         select ARCH_MIGHT_HAVE_PC_PARPORT
   6         select ARCH_NO_COHERENT_DMA_MMAP if !MMU
   7         select ARCH_WANT_IPC_PARSE_VERSION
   8         select BUILDTIME_EXTABLE_SORT
   9         select TIMER_OF
  10         select CLONE_BACKWARDS3
  11         select COMMON_CLK
  12         select GENERIC_ATOMIC64
  13         select GENERIC_CLOCKEVENTS
  14         select GENERIC_CPU_DEVICES
  15         select GENERIC_IDLE_POLL_SETUP
  16         select GENERIC_IRQ_PROBE
  17         select GENERIC_IRQ_SHOW
  18         select GENERIC_PCI_IOMAP
  19         select GENERIC_SCHED_CLOCK
  20         select HAVE_ARCH_HASH
  21         select HAVE_ARCH_KGDB
  22         select HAVE_DEBUG_KMEMLEAK
  23         select HAVE_DYNAMIC_FTRACE
  24         select HAVE_FTRACE_MCOUNT_RECORD
  25         select HAVE_FUNCTION_GRAPH_TRACER
  26         select HAVE_FUNCTION_TRACER
  27         select NO_BOOTMEM
  28         select HAVE_MEMBLOCK
  29         select HAVE_MEMBLOCK_NODE_MAP
  30         select HAVE_OPROFILE
  31         select IRQ_DOMAIN
  32         select XILINX_INTC
  33         select MODULES_USE_ELF_RELA
  34         select OF
  35         select OF_EARLY_FLATTREE
  36         select TRACING_SUPPORT
  37         select VIRT_TO_BUS
  38         select CPU_NO_EFFICIENT_FFS
  39
  40 # Endianness selection
  41 choice
  42         prompt "Endianness selection"
  43         default CPU_LITTLE_ENDIAN
  44         help
  45           microblaze architectures can be configured for either little or
  46           big endian formats. Be sure to select the appropriate mode.
  47
  48 config CPU_BIG_ENDIAN
  49         bool "Big endian"
  50
  51 config CPU_LITTLE_ENDIAN
  52         bool "Little endian"
  53
  54 endchoice
  55
  56 config RWSEM_GENERIC_SPINLOCK
  57         def_bool y
  58
  59 config ZONE_DMA
  60         def_bool y
  61
  62 config RWSEM_XCHGADD_ALGORITHM
  63         bool
  64
  65 config ARCH_HAS_ILOG2_U32
  66         def_bool n
  67
  68 config ARCH_HAS_ILOG2_U64
  69         def_bool n
  70
  71 config GENERIC_HWEIGHT
  72         def_bool y
  73
  74 config GENERIC_CALIBRATE_DELAY
  75         def_bool y
  76
  77 config GENERIC_CSUM
  78         def_bool y
  79
  80 config STACKTRACE_SUPPORT
  81         def_bool y
  82
  83 config LOCKDEP_SUPPORT
  84         def_bool y
  85
  86 source "arch/microblaze/Kconfig.platform"
  87
  88 menu "Processor type and features"
  89
  90 source "kernel/Kconfig.preempt"
  91
  92 source "kernel/Kconfig.hz"
  93
  94 config MMU
  95         bool "MMU support"
  96         default n
  97
  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
 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
 138 endmenu
 139
 140 menu "Kernel features"
 141
 142 config NR_CPUS
 143         int
 144         default "1"
 145
 146 config ADVANCED_OPTIONS
 147         bool "Prompt for advanced kernel configuration options"
 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
 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
 168 config HIGHMEM
 169         bool "High memory support"
 170         depends on MMU
 171         help
 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".
 178
 179           If unsure, say n.
 180
 181 config LOWMEM_SIZE_BOOL
 182         bool "Set maximum low memory"
 183         depends on ADVANCED_OPTIONS && MMU
 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
 195         default "0x30000000"
 196
 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
 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"
 226         depends on ADVANCED_OPTIONS && MMU
 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
 236         default "0x80000000"
 237
 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
 257 config MICROBLAZE_16K_PAGES
 258         bool "16k page size"
 259
 260 config MICROBLAZE_64K_PAGES
 261         bool "64k page size"
 262
 263 endchoice
 264
 265 endmenu
 266
 267 menu "Bus Options"
 268
 269 config PCI
 270         bool "PCI support"
 271
 272 config PCI_DOMAINS
 273         def_bool PCI
 274
 275 config PCI_DOMAINS_GENERIC
 276         def_bool PCI_DOMAINS
 277
 278 config PCI_SYSCALL
 279         def_bool PCI
 280
 281 config PCI_XILINX
 282         bool "Xilinx PCI host bridge support"
 283         depends on PCI
 284
 285 source "drivers/pci/Kconfig"
 286
 287 endmenu
 288
 289 source "arch/microblaze/Kconfig.debug"