1# SPDX-License-Identifier: GPL-2.0-only 2config MICROBLAZE 3 def_bool y 4 select ARCH_32BIT_OFF_T 5 select ARCH_NO_SWAP 6 select ARCH_HAS_BINFMT_FLAT if !MMU 7 select ARCH_HAS_DMA_PREP_COHERENT 8 select ARCH_HAS_GCOV_PROFILE_ALL 9 select ARCH_HAS_SYNC_DMA_FOR_CPU 10 select ARCH_HAS_SYNC_DMA_FOR_DEVICE 11 select ARCH_HAS_DMA_SET_UNCACHED if !MMU 12 select ARCH_MIGHT_HAVE_PC_PARPORT 13 select ARCH_WANT_IPC_PARSE_VERSION 14 select BUILDTIME_TABLE_SORT 15 select TIMER_OF 16 select CLONE_BACKWARDS3 17 select COMMON_CLK 18 select DMA_DIRECT_REMAP if MMU 19 select GENERIC_ATOMIC64 20 select GENERIC_CLOCKEVENTS 21 select GENERIC_CPU_DEVICES 22 select GENERIC_IDLE_POLL_SETUP 23 select GENERIC_IRQ_PROBE 24 select GENERIC_IRQ_SHOW 25 select GENERIC_PCI_IOMAP 26 select GENERIC_SCHED_CLOCK 27 select HAVE_ARCH_HASH 28 select HAVE_ARCH_KGDB 29 select HAVE_ARCH_SECCOMP 30 select HAVE_DEBUG_KMEMLEAK 31 select HAVE_DMA_CONTIGUOUS 32 select HAVE_DYNAMIC_FTRACE 33 select HAVE_FTRACE_MCOUNT_RECORD 34 select HAVE_FUNCTION_GRAPH_TRACER 35 select HAVE_FUNCTION_TRACER 36 select HAVE_OPROFILE 37 select HAVE_PCI 38 select IRQ_DOMAIN 39 select XILINX_INTC 40 select MODULES_USE_ELF_RELA 41 select OF 42 select OF_EARLY_FLATTREE 43 select PCI_DOMAINS_GENERIC if PCI 44 select PCI_SYSCALL if PCI 45 select TRACING_SUPPORT 46 select VIRT_TO_BUS 47 select CPU_NO_EFFICIENT_FFS 48 select MMU_GATHER_NO_RANGE if MMU 49 select SPARSE_IRQ 50 select SET_FS 51 52# Endianness selection 53choice 54 prompt "Endianness selection" 55 default CPU_LITTLE_ENDIAN 56 help 57 microblaze architectures can be configured for either little or 58 big endian formats. Be sure to select the appropriate mode. 59 60config CPU_BIG_ENDIAN 61 bool "Big endian" 62 63config CPU_LITTLE_ENDIAN 64 bool "Little endian" 65 66endchoice 67 68config ZONE_DMA 69 def_bool y 70 71config ARCH_HAS_ILOG2_U32 72 def_bool n 73 74config ARCH_HAS_ILOG2_U64 75 def_bool n 76 77config GENERIC_HWEIGHT 78 def_bool y 79 80config GENERIC_CALIBRATE_DELAY 81 def_bool y 82 83config GENERIC_CSUM 84 def_bool y 85 86config STACKTRACE_SUPPORT 87 def_bool y 88 89config LOCKDEP_SUPPORT 90 def_bool y 91 92source "arch/microblaze/Kconfig.platform" 93 94menu "Processor type and features" 95 96source "kernel/Kconfig.hz" 97 98config MMU 99 bool "MMU support" 100 default n 101 102comment "Boot options" 103 104config CMDLINE_BOOL 105 bool "Default bootloader kernel arguments" 106 107config CMDLINE 108 string "Default kernel command string" 109 depends on CMDLINE_BOOL 110 default "console=ttyUL0,115200" 111 help 112 On some architectures there is currently no way for the boot loader 113 to pass arguments to the kernel. For these architectures, you should 114 supply some command-line options at build time by entering them 115 here. 116 117config CMDLINE_FORCE 118 bool "Force default kernel command string" 119 depends on CMDLINE_BOOL 120 default n 121 help 122 Set this to have arguments from the default kernel command string 123 override those passed by the boot loader. 124 125endmenu 126 127menu "Kernel features" 128 129config NR_CPUS 130 int 131 default "1" 132 133config ADVANCED_OPTIONS 134 bool "Prompt for advanced kernel configuration options" 135 help 136 This option will enable prompting for a variety of advanced kernel 137 configuration options. These options can cause the kernel to not 138 work if they are set incorrectly, but can be used to optimize certain 139 aspects of kernel memory management. 140 141 Unless you know what you are doing, say N here. 142 143comment "Default settings for advanced configuration options are used" 144 depends on !ADVANCED_OPTIONS 145 146config XILINX_UNCACHED_SHADOW 147 bool "Are you using uncached shadow for RAM ?" 148 depends on ADVANCED_OPTIONS && !MMU 149 default n 150 help 151 This is needed to be able to allocate uncachable memory regions. 152 The feature requires the design to define the RAM memory controller 153 window to be twice as large as the actual physical memory. 154 155config HIGHMEM 156 bool "High memory support" 157 depends on MMU 158 select KMAP_LOCAL 159 help 160 The address space of Microblaze processors is only 4 Gigabytes large 161 and it has to accommodate user address space, kernel address 162 space as well as some memory mapped IO. That means that, if you 163 have a large amount of physical memory and/or IO, not all of the 164 memory can be "permanently mapped" by the kernel. The physical 165 memory that is not permanently mapped is called "high memory". 166 167 If unsure, say n. 168 169config LOWMEM_SIZE_BOOL 170 bool "Set maximum low memory" 171 depends on ADVANCED_OPTIONS && MMU 172 help 173 This option allows you to set the maximum amount of memory which 174 will be used as "low memory", that is, memory which the kernel can 175 access directly, without having to set up a kernel virtual mapping. 176 This can be useful in optimizing the layout of kernel virtual 177 memory. 178 179 Say N here unless you know what you are doing. 180 181config LOWMEM_SIZE 182 hex "Maximum low memory size (in bytes)" if LOWMEM_SIZE_BOOL 183 default "0x30000000" 184 185config MANUAL_RESET_VECTOR 186 hex "Microblaze reset vector address setup" 187 default "0x0" 188 help 189 Set this option to have the kernel override the CPU Reset vector. 190 If zero, no change will be made to the MicroBlaze reset vector at 191 address 0x0. 192 If non-zero, a jump instruction to this address, will be written 193 to the reset vector at address 0x0. 194 If you are unsure, set it to default value 0x0. 195 196config KERNEL_START_BOOL 197 bool "Set custom kernel base address" 198 depends on ADVANCED_OPTIONS 199 help 200 This option allows you to set the kernel virtual address at which 201 the kernel will map low memory (the kernel image will be linked at 202 this address). This can be useful in optimizing the virtual memory 203 layout of the system. 204 205 Say N here unless you know what you are doing. 206 207config KERNEL_START 208 hex "Virtual address of kernel base" if KERNEL_START_BOOL 209 default "0xc0000000" if MMU 210 default KERNEL_BASE_ADDR if !MMU 211 212config TASK_SIZE_BOOL 213 bool "Set custom user task size" 214 depends on ADVANCED_OPTIONS && MMU 215 help 216 This option allows you to set the amount of virtual address space 217 allocated to user tasks. This can be useful in optimizing the 218 virtual memory layout of the system. 219 220 Say N here unless you know what you are doing. 221 222config TASK_SIZE 223 hex "Size of user task space" if TASK_SIZE_BOOL 224 default "0x80000000" 225 226choice 227 prompt "Page size" 228 default MICROBLAZE_4K_PAGES 229 depends on ADVANCED_OPTIONS && !MMU 230 help 231 Select the kernel logical page size. Increasing the page size 232 will reduce software overhead at each page boundary, allow 233 hardware prefetch mechanisms to be more effective, and allow 234 larger dma transfers increasing IO efficiency and reducing 235 overhead. However the utilization of memory will increase. 236 For example, each cached file will using a multiple of the 237 page size to hold its contents and the difference between the 238 end of file and the end of page is wasted. 239 240 If unsure, choose 4K_PAGES. 241 242config MICROBLAZE_4K_PAGES 243 bool "4k page size" 244 245config MICROBLAZE_16K_PAGES 246 bool "16k page size" 247 248config MICROBLAZE_64K_PAGES 249 bool "64k page size" 250 251endchoice 252 253endmenu 254 255menu "Bus Options" 256 257config PCI_XILINX 258 bool "Xilinx PCI host bridge support" 259 depends on PCI 260 261endmenu 262