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