arch/openrisc/Kconfig

   1 # SPDX-License-Identifier: GPL-2.0
   2 #
   3 # For a description of the syntax of this configuration file,
   4 # see Documentation/kbuild/kconfig-language.txt.
   5 #
   6
   7 config OPENRISC
   8         def_bool y
   9         select OF
  10         select OF_EARLY_FLATTREE
  11         select IRQ_DOMAIN
  12         select HANDLE_DOMAIN_IRQ
  13         select HAVE_MEMBLOCK
  14         select GPIOLIB
  15         select HAVE_ARCH_TRACEHOOK
  16         select SPARSE_IRQ
  17         select GENERIC_IRQ_CHIP
  18         select GENERIC_IRQ_PROBE
  19         select GENERIC_IRQ_SHOW
  20         select GENERIC_IOMAP
  21         select GENERIC_CPU_DEVICES
  22         select HAVE_UID16
  23         select GENERIC_ATOMIC64
  24         select GENERIC_CLOCKEVENTS
  25         select GENERIC_CLOCKEVENTS_BROADCAST
  26         select GENERIC_STRNCPY_FROM_USER
  27         select GENERIC_STRNLEN_USER
  28         select GENERIC_SMP_IDLE_THREAD
  29         select MODULES_USE_ELF_RELA
  30         select HAVE_DEBUG_STACKOVERFLOW
  31         select OR1K_PIC
  32         select CPU_NO_EFFICIENT_FFS if !OPENRISC_HAVE_INST_FF1
  33         select NO_BOOTMEM
  34         select ARCH_USE_QUEUED_SPINLOCKS
  35         select ARCH_USE_QUEUED_RWLOCKS
  36         select OMPIC if SMP
  37         select ARCH_WANT_FRAME_POINTERS
  38
  39 config CPU_BIG_ENDIAN
  40         def_bool y
  41
  42 config MMU
  43         def_bool y
  44
  45 config RWSEM_GENERIC_SPINLOCK
  46         def_bool y
  47
  48 config RWSEM_XCHGADD_ALGORITHM
  49         def_bool n
  50
  51 config GENERIC_HWEIGHT
  52         def_bool y
  53
  54 config NO_IOPORT_MAP
  55         def_bool y
  56
  57 config TRACE_IRQFLAGS_SUPPORT
  58         def_bool y
  59
  60 # For now, use generic checksum functions
  61 #These can be reimplemented in assembly later if so inclined
  62 config GENERIC_CSUM
  63         def_bool y
  64
  65 config STACKTRACE_SUPPORT
  66         def_bool y
  67
  68 config LOCKDEP_SUPPORT
  69         def_bool  y
  70
  71 source "init/Kconfig"
  72
  73 source "kernel/Kconfig.freezer"
  74
  75 menu "Processor type and features"
  76
  77 choice
  78         prompt "Subarchitecture"
  79         default OR1K_1200
  80
  81 config OR1K_1200
  82         bool "OR1200"
  83         help
  84           Generic OpenRISC 1200 architecture
  85
  86 endchoice
  87
  88 config DCACHE_WRITETHROUGH
  89         bool "Have write through data caches"
  90         default n
  91         help
  92           Select this if your implementation features write through data caches.
  93           Selecting 'N' here will allow the kernel to force flushing of data
  94           caches at relevant times. Most OpenRISC implementations support write-
  95           through data caches.
  96
  97           If unsure say N here
  98
  99 config OPENRISC_BUILTIN_DTB
 100         string "Builtin DTB"
 101         default ""
 102
 103 menu "Class II Instructions"
 104
 105 config OPENRISC_HAVE_INST_FF1
 106         bool "Have instruction l.ff1"
 107         default y
 108         help
 109           Select this if your implementation has the Class II instruction l.ff1
 110
 111 config OPENRISC_HAVE_INST_FL1
 112         bool "Have instruction l.fl1"
 113         default y
 114         help
 115           Select this if your implementation has the Class II instruction l.fl1
 116
 117 config OPENRISC_HAVE_INST_MUL
 118         bool "Have instruction l.mul for hardware multiply"
 119         default y
 120         help
 121           Select this if your implementation has a hardware multiply instruction
 122
 123 config OPENRISC_HAVE_INST_DIV
 124         bool "Have instruction l.div for hardware divide"
 125         default y
 126         help
 127           Select this if your implementation has a hardware divide instruction
 128 endmenu
 129
 130 config NR_CPUS
 131         int "Maximum number of CPUs (2-32)"
 132         range 2 32
 133         depends on SMP
 134         default "2"
 135
 136 config SMP
 137         bool "Symmetric Multi-Processing support"
 138         help
 139           This enables support for systems with more than one CPU. If you have
 140           a system with only one CPU, say N. If you have a system with more
 141           than one CPU, say Y.
 142
 143           If you don't know what to do here, say N.
 144
 145 source kernel/Kconfig.hz
 146 source kernel/Kconfig.preempt
 147 source "mm/Kconfig"
 148
 149 config OPENRISC_NO_SPR_SR_DSX
 150         bool "use SPR_SR_DSX software emulation" if OR1K_1200
 151         default y
 152         help
 153           SPR_SR_DSX bit is status register bit indicating whether
 154           the last exception has happened in delay slot.
 155
 156           OpenRISC architecture makes it optional to have it implemented
 157           in hardware and the OR1200 does not have it.
 158
 159           Say N here if you know that your OpenRISC processor has
 160           SPR_SR_DSX bit implemented. Say Y if you are unsure.
 161
 162 config OPENRISC_HAVE_SHADOW_GPRS
 163         bool "Support for shadow gpr files" if !SMP
 164         default y if SMP
 165         help
 166           Say Y here if your OpenRISC processor features shadowed
 167           register files. They will in such case be used as a
 168           scratch reg storage on exception entry.
 169
 170           On SMP systems, this feature is mandatory.
 171           On a unicore system it's safe to say N here if you are unsure.
 172
 173 config CMDLINE
 174         string "Default kernel command string"
 175         default ""
 176         help
 177           On some architectures there is currently no way for the boot loader
 178           to pass arguments to the kernel. For these architectures, you should
 179           supply some command-line options at build time by entering them
 180           here.
 181
 182 menu "Debugging options"
 183
 184 config JUMP_UPON_UNHANDLED_EXCEPTION
 185         bool "Try to die gracefully"
 186         default y
 187         help
 188           Now this puts kernel into infinite loop after first oops. Till
 189           your kernel crashes this doesn't have any influence.
 190
 191           Say Y if you are unsure.
 192
 193 config OPENRISC_ESR_EXCEPTION_BUG_CHECK
 194         bool "Check for possible ESR exception bug"
 195         default n
 196         help
 197           This option enables some checks that might expose some problems
 198           in kernel.
 199
 200           Say N if you are unsure.
 201
 202 endmenu
 203
 204 endmenu
 205
 206 menu "Executable file formats"
 207
 208 source "fs/Kconfig.binfmt"
 209
 210 endmenu
 211
 212 source "net/Kconfig"
 213
 214 source "drivers/Kconfig"
 215
 216 source "fs/Kconfig"
 217
 218 source "security/Kconfig"
 219
 220 source "crypto/Kconfig"
 221
 222 source "lib/Kconfig"
 223
 224 menu "Kernel hacking"
 225
 226 source "lib/Kconfig.debug"
 227
 228 endmenu