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