1config 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_DYNAMIC_FTRACE 13 select HAVE_FTRACE_MCOUNT_RECORD 14 select HAVE_FUNCTION_TRACER 15 select HAVE_FUNCTION_TRACE_MCOUNT_TEST 16 select HAVE_GENERIC_HARDIRQS 17 select HAVE_KERNEL_BZIP2 18 select HAVE_KERNEL_GZIP 19 select HAVE_KERNEL_LZO 20 select HAVE_KERNEL_XZ 21 select HAVE_MEMBLOCK 22 select HAVE_MEMBLOCK_NODE_MAP 23 select HAVE_MOD_ARCH_SPECIFIC 24 select HAVE_OPROFILE 25 select HAVE_PERF_EVENTS 26 select HAVE_SYSCALL_TRACEPOINTS 27 select HAVE_UNDERSCORE_SYMBOL_PREFIX 28 select IRQ_DOMAIN 29 select MODULES_USE_ELF_RELA 30 select OF 31 select OF_EARLY_FLATTREE 32 select SPARSE_IRQ 33 34config STACKTRACE_SUPPORT 35 def_bool y 36 37config LOCKDEP_SUPPORT 38 def_bool y 39 40config HAVE_LATENCYTOP_SUPPORT 41 def_bool y 42 43config RWSEM_GENERIC_SPINLOCK 44 def_bool y 45 46config RWSEM_XCHGADD_ALGORITHM 47 bool 48 49config GENERIC_HWEIGHT 50 def_bool y 51 52config GENERIC_CALIBRATE_DELAY 53 def_bool y 54 55config NO_IOPORT 56 def_bool y 57 58source "init/Kconfig" 59 60source "kernel/Kconfig.freezer" 61 62menu "Processor type and features" 63 64config MMU 65 def_bool y 66 67config STACK_GROWSUP 68 def_bool y 69 70config HOTPLUG_CPU 71 bool "Enable CPU hotplug support" 72 depends on SMP 73 help 74 Say Y here to allow turning CPUs off and on. CPUs can be 75 controlled through /sys/devices/system/cpu. 76 77 Say N if you want to disable CPU hotplug. 78 79config HIGHMEM 80 bool "High Memory Support" 81 help 82 The address space of Meta processors is only 4 Gigabytes large 83 and it has to accommodate user address space, kernel address 84 space as well as some memory mapped IO. That means that, if you 85 have a large amount of physical memory and/or IO, not all of the 86 memory can be "permanently mapped" by the kernel. The physical 87 memory that is not permanently mapped is called "high memory". 88 89 Depending on the selected kernel/user memory split, minimum 90 vmalloc space and actual amount of RAM, you may not need this 91 option which should result in a slightly faster kernel. 92 93 If unsure, say n. 94 95source "arch/metag/mm/Kconfig" 96 97source "arch/metag/Kconfig.soc" 98 99config METAG_META12 100 bool 101 help 102 Select this from the SoC config symbol to indicate that it contains a 103 Meta 1.2 core. 104 105config METAG_META21 106 bool 107 help 108 Select this from the SoC config symbol to indicate that it contains a 109 Meta 2.1 core. 110 111config SMP 112 bool "Symmetric multi-processing support" 113 depends on METAG_META21 && METAG_META21_MMU 114 select USE_GENERIC_SMP_HELPERS 115 help 116 This enables support for systems with more than one thread running 117 Linux. If you have a system with only one thread running Linux, 118 say N. Otherwise, say Y. 119 120config NR_CPUS 121 int "Maximum number of CPUs (2-4)" if SMP 122 range 2 4 if SMP 123 default "1" if !SMP 124 default "4" if SMP 125 126config METAG_SMP_WRITE_REORDERING 127 bool 128 help 129 This attempts to prevent cache-memory incoherence due to external 130 reordering of writes from different hardware threads when SMP is 131 enabled. It adds fences (system event 0) to smp_mb and smp_rmb in an 132 attempt to catch some of the cases, and also before writes to shared 133 memory in LOCK1 protected atomics and spinlocks. 134 This will not completely prevent cache incoherency on affected cores. 135 136config METAG_LNKGET_AROUND_CACHE 137 bool 138 depends on METAG_META21 139 help 140 This indicates that the LNKGET/LNKSET instructions go around the 141 cache, which requires some extra cache flushes when the memory needs 142 to be accessed by normal GET/SET instructions too. 143 144choice 145 prompt "Atomicity primitive" 146 default METAG_ATOMICITY_LNKGET 147 help 148 This option selects the mechanism for performing atomic operations. 149 150config METAG_ATOMICITY_IRQSOFF 151 depends on !SMP 152 bool "irqsoff" 153 help 154 This option disables interrupts to achieve atomicity. This mechanism 155 is not SMP-safe. 156 157config METAG_ATOMICITY_LNKGET 158 depends on METAG_META21 159 bool "lnkget/lnkset" 160 help 161 This option uses the LNKGET and LNKSET instructions to achieve 162 atomicity. LNKGET/LNKSET are load-link/store-conditional instructions. 163 Choose this option if your system requires low latency. 164 165config METAG_ATOMICITY_LOCK1 166 depends on SMP 167 bool "lock1" 168 help 169 This option uses the LOCK1 instruction for atomicity. This is mainly 170 provided as a debugging aid if the lnkget/lnkset atomicity primitive 171 isn't working properly. 172 173endchoice 174 175config METAG_FPU 176 bool "FPU Support" 177 depends on METAG_META21 178 default y 179 help 180 This option allows processes to use FPU hardware available with this 181 CPU. If this option is not enabled FPU registers will not be saved 182 and restored on context-switch. 183 184 If you plan on running programs which are compiled to use hard floats 185 say Y here. 186 187config METAG_DSP 188 bool "DSP Support" 189 help 190 This option allows processes to use DSP hardware available 191 with this CPU. If this option is not enabled DSP registers 192 will not be saved and restored on context-switch. 193 194 If you plan on running DSP programs say Y here. 195 196config METAG_PERFCOUNTER_IRQS 197 bool "PerfCounters interrupt support" 198 depends on METAG_META21 199 help 200 This option enables using interrupts to collect information from 201 Performance Counters. This option is supported in new META21 202 (starting from HTP265). 203 204 When disabled, Performance Counters information will be collected 205 based on Timer Interrupt. 206 207config HW_PERF_EVENTS 208 def_bool METAG_PERFCOUNTER_IRQS && PERF_EVENTS 209 210config METAG_DA 211 bool "DA support" 212 help 213 Say Y if you plan to use a DA debug adapter with Linux. The presence 214 of the DA will be detected automatically at boot, so it is safe to say 215 Y to this option even when booting without a DA. 216 217 This enables support for services provided by DA JTAG debug adapters, 218 such as: 219 - communication over DA channels (such as the console driver). 220 - use of the DA filesystem. 221 222menu "Boot options" 223 224config METAG_BUILTIN_DTB 225 bool "Embed DTB in kernel image" 226 default y 227 help 228 Embeds a device tree binary in the kernel image. 229 230config METAG_BUILTIN_DTB_NAME 231 string "Built in DTB" 232 depends on METAG_BUILTIN_DTB 233 help 234 Set the name of the DTB to embed (leave blank to pick one 235 automatically based on kernel configuration). 236 237config CMDLINE_BOOL 238 bool "Default bootloader kernel arguments" 239 240config CMDLINE 241 string "Kernel command line" 242 depends on CMDLINE_BOOL 243 help 244 On some architectures there is currently no way for the boot loader 245 to pass arguments to the kernel. For these architectures, you should 246 supply some command-line options at build time by entering them 247 here. 248 249config CMDLINE_FORCE 250 bool "Force default kernel command string" 251 depends on CMDLINE_BOOL 252 help 253 Set this to have arguments from the default kernel command string 254 override those passed by the boot loader. 255 256endmenu 257 258source "kernel/Kconfig.preempt" 259 260source kernel/Kconfig.hz 261 262endmenu 263 264menu "Power management options" 265 266source kernel/power/Kconfig 267 268endmenu 269 270menu "Executable file formats" 271 272source "fs/Kconfig.binfmt" 273 274endmenu 275 276source "net/Kconfig" 277 278source "drivers/Kconfig" 279 280source "fs/Kconfig" 281 282source "arch/metag/Kconfig.debug" 283 284source "security/Kconfig" 285 286source "crypto/Kconfig" 287 288source "lib/Kconfig" 289