arch/metag/Kconfig

   1 config METAG
   2         def_bool y
   3         select EMBEDDED
   4         select GENERIC_ATOMIC64
   5         select GENERIC_CLOCKEVENTS
   6         select GENERIC_IRQ_SHOW
   7         select GENERIC_SMP_IDLE_THREAD
   8         select HAVE_64BIT_ALIGNED_ACCESS
   9         select HAVE_ARCH_TRACEHOOK
  10         select HAVE_C_RECORDMCOUNT
  11         select HAVE_DEBUG_KMEMLEAK
  12         select HAVE_DEBUG_STACKOVERFLOW
  13         select HAVE_DYNAMIC_FTRACE
  14         select HAVE_FTRACE_MCOUNT_RECORD
  15         select HAVE_FUNCTION_TRACER
  16         select HAVE_KERNEL_BZIP2
  17         select HAVE_KERNEL_GZIP
  18         select HAVE_KERNEL_LZO
  19         select HAVE_KERNEL_XZ
  20         select HAVE_MEMBLOCK
  21         select HAVE_MEMBLOCK_NODE_MAP
  22         select HAVE_MOD_ARCH_SPECIFIC
  23         select HAVE_OPROFILE
  24         select HAVE_PERF_EVENTS
  25         select HAVE_SYSCALL_TRACEPOINTS
  26         select HAVE_UNDERSCORE_SYMBOL_PREFIX
  27         select IRQ_DOMAIN
  28         select MODULES_USE_ELF_RELA
  29         select OF
  30         select OF_EARLY_FLATTREE
  31         select SPARSE_IRQ
  32
  33 config STACKTRACE_SUPPORT
  34         def_bool y
  35
  36 config LOCKDEP_SUPPORT
  37         def_bool y
  38
  39 config RWSEM_GENERIC_SPINLOCK
  40         def_bool y
  41
  42 config RWSEM_XCHGADD_ALGORITHM
  43         bool
  44
  45 config GENERIC_HWEIGHT
  46         def_bool y
  47
  48 config GENERIC_CALIBRATE_DELAY
  49         def_bool y
  50
  51 config NO_IOPORT_MAP
  52         def_bool y
  53
  54 source "init/Kconfig"
  55
  56 source "kernel/Kconfig.freezer"
  57
  58 menu "Processor type and features"
  59
  60 config MMU
  61         def_bool y
  62
  63 config STACK_GROWSUP
  64         def_bool y
  65
  66 config HOTPLUG_CPU
  67         bool "Enable CPU hotplug support"
  68         depends on SMP
  69         help
  70           Say Y here to allow turning CPUs off and on. CPUs can be
  71           controlled through /sys/devices/system/cpu.
  72
  73           Say N if you want to disable CPU hotplug.
  74
  75 config HIGHMEM
  76         bool "High Memory Support"
  77         help
  78           The address space of Meta processors is only 4 Gigabytes large
  79           and it has to accommodate user address space, kernel address
  80           space as well as some memory mapped IO. That means that, if you
  81           have a large amount of physical memory and/or IO, not all of the
  82           memory can be "permanently mapped" by the kernel. The physical
  83           memory that is not permanently mapped is called "high memory".
  84
  85           Depending on the selected kernel/user memory split, minimum
  86           vmalloc space and actual amount of RAM, you may not need this
  87           option which should result in a slightly faster kernel.
  88
  89           If unsure, say n.
  90
  91 source "arch/metag/mm/Kconfig"
  92
  93 source "arch/metag/Kconfig.soc"
  94
  95 config METAG_META12
  96         bool
  97         help
  98           Select this from the SoC config symbol to indicate that it contains a
  99           Meta 1.2 core.
 100
 101 config METAG_META21
 102         bool
 103         help
 104           Select this from the SoC config symbol to indicate that it contains a
 105           Meta 2.1 core.
 106
 107 config SMP
 108         bool "Symmetric multi-processing support"
 109         depends on METAG_META21 && METAG_META21_MMU
 110         help
 111           This enables support for systems with more than one thread running
 112           Linux. If you have a system with only one thread running Linux,
 113           say N. Otherwise, say Y.
 114
 115 config NR_CPUS
 116         int "Maximum number of CPUs (2-4)" if SMP
 117         range 2 4 if SMP
 118         default "1" if !SMP
 119         default "4" if SMP
 120
 121 config METAG_SMP_WRITE_REORDERING
 122         bool
 123         help
 124           This attempts to prevent cache-memory incoherence due to external
 125           reordering of writes from different hardware threads when SMP is
 126           enabled. It adds fences (system event 0) to smp_mb and smp_rmb in an
 127           attempt to catch some of the cases, and also before writes to shared
 128           memory in LOCK1 protected atomics and spinlocks.
 129           This will not completely prevent cache incoherency on affected cores.
 130
 131 config METAG_LNKGET_AROUND_CACHE
 132         bool
 133         depends on METAG_META21
 134         help
 135           This indicates that the LNKGET/LNKSET instructions go around the
 136           cache, which requires some extra cache flushes when the memory needs
 137           to be accessed by normal GET/SET instructions too.
 138
 139 choice
 140         prompt "Atomicity primitive"
 141         default METAG_ATOMICITY_LNKGET
 142         help
 143           This option selects the mechanism for performing atomic operations.
 144
 145 config METAG_ATOMICITY_IRQSOFF
 146         depends on !SMP
 147         bool "irqsoff"
 148         help
 149           This option disables interrupts to achieve atomicity. This mechanism
 150           is not SMP-safe.
 151
 152 config METAG_ATOMICITY_LNKGET
 153         depends on METAG_META21
 154         bool "lnkget/lnkset"
 155         help
 156           This option uses the LNKGET and LNKSET instructions to achieve
 157           atomicity. LNKGET/LNKSET are load-link/store-conditional instructions.
 158           Choose this option if your system requires low latency.
 159
 160 config METAG_ATOMICITY_LOCK1
 161         depends on SMP
 162         bool "lock1"
 163         help
 164           This option uses the LOCK1 instruction for atomicity. This is mainly
 165           provided as a debugging aid if the lnkget/lnkset atomicity primitive
 166           isn't working properly.
 167
 168 endchoice
 169
 170 config METAG_FPU
 171         bool "FPU Support"
 172         depends on METAG_META21
 173         default y
 174         help
 175           This option allows processes to use FPU hardware available with this
 176           CPU. If this option is not enabled FPU registers will not be saved
 177           and restored on context-switch.
 178
 179           If you plan on running programs which are compiled to use hard floats
 180           say Y here.
 181
 182 config METAG_DSP
 183         bool "DSP Support"
 184         help
 185           This option allows processes to use DSP hardware available
 186           with this CPU. If this option is not enabled DSP registers
 187           will not be saved and restored on context-switch.
 188
 189           If you plan on running DSP programs say Y here.
 190
 191 config METAG_PERFCOUNTER_IRQS
 192         bool "PerfCounters interrupt support"
 193         depends on METAG_META21
 194         help
 195           This option enables using interrupts to collect information from
 196           Performance Counters. This option is supported in new META21
 197           (starting from HTP265).
 198
 199           When disabled, Performance Counters information will be collected
 200           based on Timer Interrupt.
 201
 202 config HW_PERF_EVENTS
 203         def_bool METAG_PERFCOUNTER_IRQS && PERF_EVENTS
 204
 205 config METAG_DA
 206         bool "DA support"
 207         help
 208           Say Y if you plan to use a DA debug adapter with Linux. The presence
 209           of the DA will be detected automatically at boot, so it is safe to say
 210           Y to this option even when booting without a DA.
 211
 212           This enables support for services provided by DA JTAG debug adapters,
 213           such as:
 214           - communication over DA channels (such as the console driver).
 215           - use of the DA filesystem.
 216
 217 menu "Boot options"
 218
 219 config METAG_BUILTIN_DTB
 220         bool "Embed DTB in kernel image"
 221         default y
 222         help
 223           Embeds a device tree binary in the kernel image.
 224
 225 config METAG_BUILTIN_DTB_NAME
 226         string "Built in DTB"
 227         depends on METAG_BUILTIN_DTB
 228         help
 229           Set the name of the DTB to embed (leave blank to pick one
 230           automatically based on kernel configuration).
 231
 232 config CMDLINE_BOOL
 233         bool "Default bootloader kernel arguments"
 234
 235 config CMDLINE
 236         string "Kernel command line"
 237         depends on CMDLINE_BOOL
 238         help
 239           On some architectures there is currently no way for the boot loader
 240           to pass arguments to the kernel. For these architectures, you should
 241           supply some command-line options at build time by entering them
 242           here.
 243
 244 config CMDLINE_FORCE
 245         bool "Force default kernel command string"
 246         depends on CMDLINE_BOOL
 247         help
 248           Set this to have arguments from the default kernel command string
 249           override those passed by the boot loader.
 250
 251 endmenu
 252
 253 source "kernel/Kconfig.preempt"
 254
 255 source kernel/Kconfig.hz
 256
 257 endmenu
 258
 259 menu "Power management options"
 260
 261 source kernel/power/Kconfig
 262
 263 endmenu
 264
 265 menu "Executable file formats"
 266
 267 source "fs/Kconfig.binfmt"
 268
 269 endmenu
 270
 271 source "net/Kconfig"
 272
 273 source "drivers/Kconfig"
 274
 275 source "fs/Kconfig"
 276
 277 source "arch/metag/Kconfig.debug"
 278
 279 source "security/Kconfig"
 280
 281 source "crypto/Kconfig"
 282
 283 source "lib/Kconfig"