1config MICROBLAZE 2 def_bool y 3 select ARCH_NO_SWAP 4 select ARCH_HAS_GCOV_PROFILE_ALL 5 select ARCH_MIGHT_HAVE_PC_PARPORT 6 select ARCH_NO_COHERENT_DMA_MMAP if !MMU 7 select ARCH_WANT_IPC_PARSE_VERSION 8 select BUILDTIME_EXTABLE_SORT 9 select TIMER_OF 10 select CLONE_BACKWARDS3 11 select COMMON_CLK 12 select GENERIC_ATOMIC64 13 select GENERIC_CLOCKEVENTS 14 select GENERIC_CPU_DEVICES 15 select GENERIC_IDLE_POLL_SETUP 16 select GENERIC_IRQ_PROBE 17 select GENERIC_IRQ_SHOW 18 select GENERIC_PCI_IOMAP 19 select GENERIC_SCHED_CLOCK 20 select HAVE_ARCH_HASH 21 select HAVE_ARCH_KGDB 22 select HAVE_DEBUG_KMEMLEAK 23 select HAVE_DYNAMIC_FTRACE 24 select HAVE_FTRACE_MCOUNT_RECORD 25 select HAVE_FUNCTION_GRAPH_TRACER 26 select HAVE_FUNCTION_TRACER 27 select NO_BOOTMEM 28 select HAVE_MEMBLOCK 29 select HAVE_MEMBLOCK_NODE_MAP 30 select HAVE_OPROFILE 31 select IRQ_DOMAIN 32 select XILINX_INTC 33 select MODULES_USE_ELF_RELA 34 select OF 35 select OF_EARLY_FLATTREE 36 select TRACING_SUPPORT 37 select VIRT_TO_BUS 38 select CPU_NO_EFFICIENT_FFS 39 40# Endianness selection 41choice 42 prompt "Endianness selection" 43 default CPU_LITTLE_ENDIAN 44 help 45 microblaze architectures can be configured for either little or 46 big endian formats. Be sure to select the appropriate mode. 47 48config CPU_BIG_ENDIAN 49 bool "Big endian" 50 51config CPU_LITTLE_ENDIAN 52 bool "Little endian" 53 54endchoice 55 56config RWSEM_GENERIC_SPINLOCK 57 def_bool y 58 59config ZONE_DMA 60 def_bool y 61 62config RWSEM_XCHGADD_ALGORITHM 63 bool 64 65config ARCH_HAS_ILOG2_U32 66 def_bool n 67 68config ARCH_HAS_ILOG2_U64 69 def_bool n 70 71config GENERIC_HWEIGHT 72 def_bool y 73 74config GENERIC_CALIBRATE_DELAY 75 def_bool y 76 77config GENERIC_CSUM 78 def_bool y 79 80config STACKTRACE_SUPPORT 81 def_bool y 82 83config LOCKDEP_SUPPORT 84 def_bool y 85 86source "arch/microblaze/Kconfig.platform" 87 88menu "Processor type and features" 89 90source "kernel/Kconfig.hz" 91 92config MMU 93 bool "MMU support" 94 default n 95 96comment "Boot options" 97 98config CMDLINE_BOOL 99 bool "Default bootloader kernel arguments" 100 101config CMDLINE 102 string "Default kernel command string" 103 depends on CMDLINE_BOOL 104 default "console=ttyUL0,115200" 105 help 106 On some architectures there is currently no way for the boot loader 107 to pass arguments to the kernel. For these architectures, you should 108 supply some command-line options at build time by entering them 109 here. 110 111config CMDLINE_FORCE 112 bool "Force default kernel command string" 113 depends on CMDLINE_BOOL 114 default n 115 help 116 Set this to have arguments from the default kernel command string 117 override those passed by the boot loader. 118 119config SECCOMP 120 bool "Enable seccomp to safely compute untrusted bytecode" 121 depends on PROC_FS 122 default y 123 help 124 This kernel feature is useful for number crunching applications 125 that may need to compute untrusted bytecode during their 126 execution. By using pipes or other transports made available to 127 the process as file descriptors supporting the read/write 128 syscalls, it's possible to isolate those applications in 129 their own address space using seccomp. Once seccomp is 130 enabled via /proc/<pid>/seccomp, it cannot be disabled 131 and the task is only allowed to execute a few safe syscalls 132 defined by each seccomp mode. 133 134 If unsure, say Y. Only embedded should say N here. 135 136endmenu 137 138menu "Kernel features" 139 140config NR_CPUS 141 int 142 default "1" 143 144config ADVANCED_OPTIONS 145 bool "Prompt for advanced kernel configuration options" 146 help 147 This option will enable prompting for a variety of advanced kernel 148 configuration options. These options can cause the kernel to not 149 work if they are set incorrectly, but can be used to optimize certain 150 aspects of kernel memory management. 151 152 Unless you know what you are doing, say N here. 153 154comment "Default settings for advanced configuration options are used" 155 depends on !ADVANCED_OPTIONS 156 157config XILINX_UNCACHED_SHADOW 158 bool "Are you using uncached shadow for RAM ?" 159 depends on ADVANCED_OPTIONS && !MMU 160 default n 161 help 162 This is needed to be able to allocate uncachable memory regions. 163 The feature requires the design to define the RAM memory controller 164 window to be twice as large as the actual physical memory. 165 166config HIGHMEM 167 bool "High memory support" 168 depends on MMU 169 help 170 The address space of Microblaze processors is only 4 Gigabytes large 171 and it has to accommodate user address space, kernel address 172 space as well as some memory mapped IO. That means that, if you 173 have a large amount of physical memory and/or IO, not all of the 174 memory can be "permanently mapped" by the kernel. The physical 175 memory that is not permanently mapped is called "high memory". 176 177 If unsure, say n. 178 179config LOWMEM_SIZE_BOOL 180 bool "Set maximum low memory" 181 depends on ADVANCED_OPTIONS && MMU 182 help 183 This option allows you to set the maximum amount of memory which 184 will be used as "low memory", that is, memory which the kernel can 185 access directly, without having to set up a kernel virtual mapping. 186 This can be useful in optimizing the layout of kernel virtual 187 memory. 188 189 Say N here unless you know what you are doing. 190 191config LOWMEM_SIZE 192 hex "Maximum low memory size (in bytes)" if LOWMEM_SIZE_BOOL 193 default "0x30000000" 194 195config MANUAL_RESET_VECTOR 196 hex "Microblaze reset vector address setup" 197 default "0x0" 198 help 199 Set this option to have the kernel override the CPU Reset vector. 200 If zero, no change will be made to the MicroBlaze reset vector at 201 address 0x0. 202 If non-zero, a jump instruction to this address, will be written 203 to the reset vector at address 0x0. 204 If you are unsure, set it to default value 0x0. 205 206config KERNEL_START_BOOL 207 bool "Set custom kernel base address" 208 depends on ADVANCED_OPTIONS 209 help 210 This option allows you to set the kernel virtual address at which 211 the kernel will map low memory (the kernel image will be linked at 212 this address). This can be useful in optimizing the virtual memory 213 layout of the system. 214 215 Say N here unless you know what you are doing. 216 217config KERNEL_START 218 hex "Virtual address of kernel base" if KERNEL_START_BOOL 219 default "0xc0000000" if MMU 220 default KERNEL_BASE_ADDR if !MMU 221 222config TASK_SIZE_BOOL 223 bool "Set custom user task size" 224 depends on ADVANCED_OPTIONS && MMU 225 help 226 This option allows you to set the amount of virtual address space 227 allocated to user tasks. This can be useful in optimizing the 228 virtual memory layout of the system. 229 230 Say N here unless you know what you are doing. 231 232config TASK_SIZE 233 hex "Size of user task space" if TASK_SIZE_BOOL 234 default "0x80000000" 235 236choice 237 prompt "Page size" 238 default MICROBLAZE_4K_PAGES 239 depends on ADVANCED_OPTIONS && !MMU 240 help 241 Select the kernel logical page size. Increasing the page size 242 will reduce software overhead at each page boundary, allow 243 hardware prefetch mechanisms to be more effective, and allow 244 larger dma transfers increasing IO efficiency and reducing 245 overhead. However the utilization of memory will increase. 246 For example, each cached file will using a multiple of the 247 page size to hold its contents and the difference between the 248 end of file and the end of page is wasted. 249 250 If unsure, choose 4K_PAGES. 251 252config MICROBLAZE_4K_PAGES 253 bool "4k page size" 254 255config MICROBLAZE_16K_PAGES 256 bool "16k page size" 257 258config MICROBLAZE_64K_PAGES 259 bool "64k page size" 260 261endchoice 262 263endmenu 264 265menu "Bus Options" 266 267config PCI 268 bool "PCI support" 269 270config PCI_DOMAINS 271 def_bool PCI 272 273config PCI_DOMAINS_GENERIC 274 def_bool PCI_DOMAINS 275 276config PCI_SYSCALL 277 def_bool PCI 278 279config PCI_XILINX 280 bool "Xilinx PCI host bridge support" 281 depends on PCI 282 283source "drivers/pci/Kconfig" 284 285endmenu 286