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.rst. 5# 6 7config OPENRISC 8 def_bool y 9 select ARCH_32BIT_OFF_T 10 select ARCH_HAS_DMA_SET_UNCACHED 11 select ARCH_HAS_DMA_CLEAR_UNCACHED 12 select ARCH_HAS_SYNC_DMA_FOR_DEVICE 13 select OF 14 select OF_EARLY_FLATTREE 15 select IRQ_DOMAIN 16 select HANDLE_DOMAIN_IRQ 17 select GPIOLIB 18 select HAVE_ARCH_TRACEHOOK 19 select SPARSE_IRQ 20 select GENERIC_IRQ_CHIP 21 select GENERIC_IRQ_PROBE 22 select GENERIC_IRQ_SHOW 23 select GENERIC_IOMAP 24 select GENERIC_CPU_DEVICES 25 select HAVE_UID16 26 select GENERIC_ATOMIC64 27 select GENERIC_CLOCKEVENTS 28 select GENERIC_CLOCKEVENTS_BROADCAST 29 select GENERIC_STRNCPY_FROM_USER 30 select GENERIC_STRNLEN_USER 31 select GENERIC_SMP_IDLE_THREAD 32 select MODULES_USE_ELF_RELA 33 select HAVE_DEBUG_STACKOVERFLOW 34 select OR1K_PIC 35 select CPU_NO_EFFICIENT_FFS if !OPENRISC_HAVE_INST_FF1 36 select ARCH_USE_QUEUED_SPINLOCKS 37 select ARCH_USE_QUEUED_RWLOCKS 38 select OMPIC if SMP 39 select ARCH_WANT_FRAME_POINTERS 40 select GENERIC_IRQ_MULTI_HANDLER 41 select MMU_GATHER_NO_RANGE if MMU 42 43config CPU_BIG_ENDIAN 44 def_bool y 45 46config MMU 47 def_bool y 48 49config GENERIC_HWEIGHT 50 def_bool y 51 52config NO_IOPORT_MAP 53 def_bool y 54 55config TRACE_IRQFLAGS_SUPPORT 56 def_bool y 57 58# For now, use generic checksum functions 59#These can be reimplemented in assembly later if so inclined 60config GENERIC_CSUM 61 def_bool y 62 63config STACKTRACE_SUPPORT 64 def_bool y 65 66config LOCKDEP_SUPPORT 67 def_bool y 68 69menu "Processor type and features" 70 71choice 72 prompt "Subarchitecture" 73 default OR1K_1200 74 75config OR1K_1200 76 bool "OR1200" 77 help 78 Generic OpenRISC 1200 architecture 79 80endchoice 81 82config DCACHE_WRITETHROUGH 83 bool "Have write through data caches" 84 default n 85 help 86 Select this if your implementation features write through data caches. 87 Selecting 'N' here will allow the kernel to force flushing of data 88 caches at relevant times. Most OpenRISC implementations support write- 89 through data caches. 90 91 If unsure say N here 92 93config OPENRISC_BUILTIN_DTB 94 string "Builtin DTB" 95 default "" 96 97menu "Class II Instructions" 98 99config OPENRISC_HAVE_INST_FF1 100 bool "Have instruction l.ff1" 101 default y 102 help 103 Select this if your implementation has the Class II instruction l.ff1 104 105config OPENRISC_HAVE_INST_FL1 106 bool "Have instruction l.fl1" 107 default y 108 help 109 Select this if your implementation has the Class II instruction l.fl1 110 111config OPENRISC_HAVE_INST_MUL 112 bool "Have instruction l.mul for hardware multiply" 113 default y 114 help 115 Select this if your implementation has a hardware multiply instruction 116 117config OPENRISC_HAVE_INST_DIV 118 bool "Have instruction l.div for hardware divide" 119 default y 120 help 121 Select this if your implementation has a hardware divide instruction 122endmenu 123 124config NR_CPUS 125 int "Maximum number of CPUs (2-32)" 126 range 2 32 127 depends on SMP 128 default "2" 129 130config SMP 131 bool "Symmetric Multi-Processing support" 132 help 133 This enables support for systems with more than one CPU. If you have 134 a system with only one CPU, say N. If you have a system with more 135 than one CPU, say Y. 136 137 If you don't know what to do here, say N. 138 139source "kernel/Kconfig.hz" 140 141config OPENRISC_NO_SPR_SR_DSX 142 bool "use SPR_SR_DSX software emulation" if OR1K_1200 143 default y 144 help 145 SPR_SR_DSX bit is status register bit indicating whether 146 the last exception has happened in delay slot. 147 148 OpenRISC architecture makes it optional to have it implemented 149 in hardware and the OR1200 does not have it. 150 151 Say N here if you know that your OpenRISC processor has 152 SPR_SR_DSX bit implemented. Say Y if you are unsure. 153 154config OPENRISC_HAVE_SHADOW_GPRS 155 bool "Support for shadow gpr files" if !SMP 156 default y if SMP 157 help 158 Say Y here if your OpenRISC processor features shadowed 159 register files. They will in such case be used as a 160 scratch reg storage on exception entry. 161 162 On SMP systems, this feature is mandatory. 163 On a unicore system it's safe to say N here if you are unsure. 164 165config CMDLINE 166 string "Default kernel command string" 167 default "" 168 help 169 On some architectures there is currently no way for the boot loader 170 to pass arguments to the kernel. For these architectures, you should 171 supply some command-line options at build time by entering them 172 here. 173 174menu "Debugging options" 175 176config JUMP_UPON_UNHANDLED_EXCEPTION 177 bool "Try to die gracefully" 178 default y 179 help 180 Now this puts kernel into infinite loop after first oops. Till 181 your kernel crashes this doesn't have any influence. 182 183 Say Y if you are unsure. 184 185config OPENRISC_ESR_EXCEPTION_BUG_CHECK 186 bool "Check for possible ESR exception bug" 187 default n 188 help 189 This option enables some checks that might expose some problems 190 in kernel. 191 192 Say N if you are unsure. 193 194endmenu 195 196endmenu 197