arch/frv/Kconfig

   1 # SPDX-License-Identifier: GPL-2.0
   2 config FRV
   3         bool
   4         default y
   5         select HAVE_IDE
   6         select HAVE_ARCH_TRACEHOOK
   7         select HAVE_PERF_EVENTS
   8         select HAVE_UID16
   9         select VIRT_TO_BUS
  10         select GENERIC_IRQ_SHOW
  11         select HAVE_DEBUG_BUGVERBOSE
  12         select ARCH_HAVE_NMI_SAFE_CMPXCHG
  13         select GENERIC_CPU_DEVICES
  14         select ARCH_HAS_DEVMEM_IS_ALLOWED
  15         select ARCH_WANT_IPC_PARSE_VERSION
  16         select OLD_SIGSUSPEND3
  17         select OLD_SIGACTION
  18         select HAVE_DEBUG_STACKOVERFLOW
  19         select ARCH_NO_COHERENT_DMA_MMAP
  20
  21 config CPU_BIG_ENDIAN
  22         def_bool y
  23
  24 config ZONE_DMA
  25         bool
  26         default y
  27
  28 config RWSEM_GENERIC_SPINLOCK
  29         bool
  30         default y
  31
  32 config RWSEM_XCHGADD_ALGORITHM
  33         bool
  34
  35 config GENERIC_HWEIGHT
  36         bool
  37         default y
  38
  39 config GENERIC_CALIBRATE_DELAY
  40         bool
  41         default n
  42
  43 config TIME_LOW_RES
  44         bool
  45         default y
  46
  47 config QUICKLIST
  48         bool
  49         default y
  50
  51 config ARCH_HAS_ILOG2_U32
  52         bool
  53         default y
  54
  55 config ARCH_HAS_ILOG2_U64
  56         bool
  57         default y
  58
  59 config HZ
  60         int
  61         default 1000
  62
  63 source "init/Kconfig"
  64
  65 source "kernel/Kconfig.freezer"
  66
  67
  68 menu "Fujitsu FR-V system setup"
  69
  70 config MMU
  71         bool "MMU support"
  72         help
  73           This options switches on and off support for the FR-V MMU
  74           (effectively switching between vmlinux and uClinux). Not all FR-V
  75           CPUs support this. Currently only the FR451 has a sufficiently
  76           featured MMU.
  77
  78 config FRV_OUTOFLINE_ATOMIC_OPS
  79         bool "Out-of-line the FRV atomic operations"
  80         default n
  81         help
  82           Setting this option causes the FR-V atomic operations to be mostly
  83           implemented out-of-line.
  84
  85           See Documentation/frv/atomic-ops.txt for more information.
  86
  87 config HIGHMEM
  88         bool "High memory support"
  89         depends on MMU
  90         default y
  91         help
  92           If you wish to use more than 256MB of memory with your MMU based
  93           system, you will need to select this option. The kernel can only see
  94           the memory between 0xC0000000 and 0xD0000000 directly... everything
  95           else must be kmapped.
  96
  97           The arch is, however, capable of supporting up to 3GB of SDRAM.
  98
  99 config HIGHPTE
 100         bool "Allocate page tables in highmem"
 101         depends on HIGHMEM
 102         default y
 103         help
 104           The VM uses one page of memory for each page table.  For systems
 105           with a lot of RAM, this can be wasteful of precious low memory.
 106           Setting this option will put user-space page tables in high memory.
 107
 108 source "mm/Kconfig"
 109
 110 choice
 111         prompt "uClinux kernel load address"
 112         depends on !MMU
 113         default UCPAGE_OFFSET_C0000000
 114         help
 115           This option sets the base address for the uClinux kernel. The kernel
 116           will rearrange the SDRAM layout to start at this address, and move
 117           itself to start there. It must be greater than 0, and it must be
 118           sufficiently less than 0xE0000000 that the SDRAM does not intersect
 119           the I/O region.
 120
 121           The base address must also be aligned such that the SDRAM controller
 122           can decode it. For instance, a 512MB SDRAM bank must be 512MB aligned.
 123
 124 config UCPAGE_OFFSET_20000000
 125        bool "0x20000000"
 126
 127 config UCPAGE_OFFSET_40000000
 128        bool "0x40000000"
 129
 130 config UCPAGE_OFFSET_60000000
 131        bool "0x60000000"
 132
 133 config UCPAGE_OFFSET_80000000
 134        bool "0x80000000"
 135
 136 config UCPAGE_OFFSET_A0000000
 137        bool "0xA0000000"
 138
 139 config UCPAGE_OFFSET_C0000000
 140        bool "0xC0000000 (Recommended)"
 141
 142 endchoice
 143
 144 config PAGE_OFFSET
 145         hex
 146         default 0x20000000 if UCPAGE_OFFSET_20000000
 147         default 0x40000000 if UCPAGE_OFFSET_40000000
 148         default 0x60000000 if UCPAGE_OFFSET_60000000
 149         default 0x80000000 if UCPAGE_OFFSET_80000000
 150         default 0xA0000000 if UCPAGE_OFFSET_A0000000
 151         default 0xC0000000
 152
 153 config PROTECT_KERNEL
 154         bool "Protect core kernel against userspace"
 155         depends on !MMU
 156         default y
 157         help
 158           Selecting this option causes the uClinux kernel to change the
 159           permittivity of DAMPR register covering the core kernel image to
 160           prevent userspace accessing the underlying memory directly.
 161
 162 choice
 163         prompt "CPU Caching mode"
 164         default FRV_DEFL_CACHE_WBACK
 165         help
 166           This option determines the default caching mode for the kernel.
 167
 168           Write-Back caching mode involves the all reads and writes causing
 169           the affected cacheline to be read into the cache first before being
 170           operated upon. Memory is not then updated by a write until the cache
 171           is filled and a cacheline needs to be displaced from the cache to
 172           make room. Only at that point is it written back.
 173
 174           Write-Behind caching is similar to Write-Back caching, except that a
 175           write won't fetch a cacheline into the cache if there isn't already
 176           one there; it will write directly to memory instead.
 177
 178           Write-Through caching only fetches cachelines from memory on a
 179           read. Writes always get written directly to memory. If the affected
 180           cacheline is also in cache, it will be updated too.
 181
 182           The final option is to turn of caching entirely.
 183
 184           Note that not all CPUs support Write-Behind caching. If the CPU on
 185           which the kernel is running doesn't, it'll fall back to Write-Back
 186           caching.
 187
 188 config FRV_DEFL_CACHE_WBACK
 189         bool "Write-Back"
 190
 191 config FRV_DEFL_CACHE_WBEHIND
 192         bool "Write-Behind"
 193
 194 config FRV_DEFL_CACHE_WTHRU
 195         bool "Write-Through"
 196
 197 config FRV_DEFL_CACHE_DISABLED
 198         bool "Disabled"
 199
 200 endchoice
 201
 202 menu "CPU core support"
 203
 204 config CPU_FR401
 205         bool "Include FR401 core support"
 206         depends on !MMU
 207         default y
 208         help
 209           This enables support for the FR401, FR401A and FR403 CPUs
 210
 211 config CPU_FR405
 212         bool "Include FR405 core support"
 213         depends on !MMU
 214         default y
 215         help
 216           This enables support for the FR405 CPU
 217
 218 config CPU_FR451
 219         bool "Include FR451 core support"
 220         default y
 221         help
 222           This enables support for the FR451 CPU
 223
 224 config CPU_FR451_COMPILE
 225         bool "Specifically compile for FR451 core"
 226         depends on CPU_FR451 && !CPU_FR401 && !CPU_FR405 && !CPU_FR551
 227         default y
 228         help
 229           This causes appropriate flags to be passed to the compiler to
 230           optimise for the FR451 CPU
 231
 232 config CPU_FR551
 233         bool "Include FR551 core support"
 234         depends on !MMU
 235         default y
 236         help
 237           This enables support for the FR555 CPU
 238
 239 config CPU_FR551_COMPILE
 240         bool "Specifically compile for FR551 core"
 241         depends on CPU_FR551 && !CPU_FR401 && !CPU_FR405 && !CPU_FR451
 242         default y
 243         help
 244           This causes appropriate flags to be passed to the compiler to
 245           optimise for the FR555 CPU
 246
 247 config FRV_L1_CACHE_SHIFT
 248         int
 249         default "5" if CPU_FR401 || CPU_FR405 || CPU_FR451
 250         default "6" if CPU_FR551
 251
 252 endmenu
 253
 254 choice
 255         prompt "System support"
 256         default MB93091_VDK
 257
 258 config MB93091_VDK
 259         bool "MB93091 CPU board with or without motherboard"
 260
 261 config MB93093_PDK
 262         bool "MB93093 PDK unit"
 263
 264 endchoice
 265
 266 if MB93091_VDK
 267 choice
 268         prompt "Motherboard support"
 269         default MB93090_MB00
 270
 271 config MB93090_MB00
 272         bool "Use the MB93090-MB00 motherboard"
 273         help
 274           Select this option if the MB93091 CPU board is going to be used with
 275           a MB93090-MB00 VDK motherboard
 276
 277 config MB93091_NO_MB
 278         bool "Use standalone"
 279         help
 280           Select this option if the MB93091 CPU board is going to be used
 281           without a motherboard
 282
 283 endchoice
 284 endif
 285
 286 config FUJITSU_MB93493
 287         bool "MB93493 Multimedia chip"
 288         help
 289           Select this option if the MB93493 multimedia chip is going to be
 290           used.
 291
 292 choice
 293         prompt "GP-Relative data support"
 294         default GPREL_DATA_8
 295         help
 296           This option controls what data, if any, should be placed in the GP
 297           relative data sections. Using this means that the compiler can
 298           generate accesses to the data using GR16-relative addressing which
 299           is faster than absolute instructions and saves space (2 instructions
 300           per access).
 301
 302           However, the GPREL region is limited in size because the immediate
 303           value used in the load and store instructions is limited to a 12-bit
 304           signed number.
 305
 306           So if the linker starts complaining that accesses to GPREL data are
 307           out of range, try changing this option from the default.
 308
 309           Note that modules will always be compiled with this feature disabled
 310           as the module data will not be in range of the GP base address.
 311
 312 config GPREL_DATA_8
 313         bool "Put data objects of up to 8 bytes into GP-REL"
 314
 315 config GPREL_DATA_4
 316         bool "Put data objects of up to 4 bytes into GP-REL"
 317
 318 config GPREL_DATA_NONE
 319         bool "Don't use GP-REL"
 320
 321 endchoice
 322
 323 config FRV_ONCPU_SERIAL
 324         bool "Use on-CPU serial ports"
 325         select SERIAL_8250
 326         default y
 327
 328 config PCI
 329         bool "Use PCI"
 330         depends on MB93090_MB00
 331         default y
 332         select GENERIC_PCI_IOMAP
 333         help
 334           Some FR-V systems (such as the MB93090-MB00 VDK) have PCI
 335           onboard. If you have one of these boards and you wish to use the PCI
 336           facilities, say Y here.
 337
 338 config RESERVE_DMA_COHERENT
 339         bool "Reserve DMA coherent memory"
 340         depends on PCI && !MMU
 341         default y
 342         help
 343           Many PCI drivers require access to uncached memory for DMA device
 344           communications (such as is done with some Ethernet buffer rings). If
 345           a fully featured MMU is available, this can be done through page
 346           table settings, but if not, a region has to be set aside and marked
 347           with a special DAMPR register.
 348
 349           Setting this option causes uClinux to set aside a portion of the
 350           available memory for use in this manner. The memory will then be
 351           unavailable for normal kernel use.
 352
 353 source "drivers/pci/Kconfig"
 354
 355 source "drivers/pcmcia/Kconfig"
 356
 357 menu "Power management options"
 358
 359 config ARCH_SUSPEND_POSSIBLE
 360         def_bool y
 361
 362 source kernel/power/Kconfig
 363 endmenu
 364
 365 endmenu
 366
 367
 368 menu "Executable formats"
 369
 370 source "fs/Kconfig.binfmt"
 371
 372 endmenu
 373
 374 source "net/Kconfig"
 375
 376 source "drivers/Kconfig"
 377
 378 source "fs/Kconfig"
 379
 380 source "arch/frv/Kconfig.debug"
 381
 382 source "security/Kconfig"
 383
 384 source "crypto/Kconfig"
 385
 386 source "lib/Kconfig"