1 # SPDX-License-Identifier: GPL-2.0-only
4 select ARCH_32BIT_OFF_T
6 select ARCH_HAS_DMA_PREP_COHERENT
7 select ARCH_HAS_GCOV_PROFILE_ALL
8 select ARCH_HAS_SYNC_DMA_FOR_CPU
9 select ARCH_HAS_SYNC_DMA_FOR_DEVICE
10 select ARCH_MIGHT_HAVE_PC_PARPORT
11 select ARCH_WANT_IPC_PARSE_VERSION
12 select BUILDTIME_TABLE_SORT
14 select CLONE_BACKWARDS3
16 select DMA_DIRECT_REMAP
17 select GENERIC_ATOMIC64
18 select GENERIC_CPU_DEVICES
19 select GENERIC_IDLE_POLL_SETUP
20 select GENERIC_IRQ_PROBE
21 select GENERIC_IRQ_SHOW
22 select GENERIC_PCI_IOMAP
23 select GENERIC_SCHED_CLOCK
26 select HAVE_ARCH_SECCOMP
27 select HAVE_DEBUG_KMEMLEAK
28 select HAVE_DMA_CONTIGUOUS
29 select HAVE_DYNAMIC_FTRACE
30 select HAVE_FTRACE_MCOUNT_RECORD
31 select HAVE_FUNCTION_GRAPH_TRACER
32 select HAVE_FUNCTION_TRACER
36 select MODULES_USE_ELF_RELA
38 select OF_EARLY_FLATTREE
39 select PCI_DOMAINS_GENERIC if PCI
40 select PCI_SYSCALL if PCI
41 select CPU_NO_EFFICIENT_FFS
42 select MMU_GATHER_NO_RANGE
45 select TRACE_IRQFLAGS_SUPPORT
46 select GENERIC_IRQ_MULTI_HANDLER
48 # Endianness selection
50 prompt "Endianness selection"
51 default CPU_LITTLE_ENDIAN
53 microblaze architectures can be configured for either little or
54 big endian formats. Be sure to select the appropriate mode.
59 config CPU_LITTLE_ENDIAN
64 config ARCH_HAS_ILOG2_U32
67 config ARCH_HAS_ILOG2_U64
70 config GENERIC_HWEIGHT
73 config GENERIC_CALIBRATE_DELAY
79 config STACKTRACE_SUPPORT
82 config LOCKDEP_SUPPORT
85 source "arch/microblaze/Kconfig.platform"
87 menu "Processor type and features"
89 source "kernel/Kconfig.hz"
94 comment "Boot options"
97 bool "Default bootloader kernel arguments"
100 string "Default kernel command string"
101 depends on CMDLINE_BOOL
102 default "console=ttyUL0,115200"
104 On some architectures there is currently no way for the boot loader
105 to pass arguments to the kernel. For these architectures, you should
106 supply some command-line options at build time by entering them
110 bool "Force default kernel command string"
111 depends on CMDLINE_BOOL
114 Set this to have arguments from the default kernel command string
115 override those passed by the boot loader.
119 menu "Kernel features"
125 config ADVANCED_OPTIONS
126 bool "Prompt for advanced kernel configuration options"
128 This option will enable prompting for a variety of advanced kernel
129 configuration options. These options can cause the kernel to not
130 work if they are set incorrectly, but can be used to optimize certain
131 aspects of kernel memory management.
133 Unless you know what you are doing, say N here.
135 comment "Default settings for advanced configuration options are used"
136 depends on !ADVANCED_OPTIONS
139 bool "High memory support"
142 The address space of Microblaze processors is only 4 Gigabytes large
143 and it has to accommodate user address space, kernel address
144 space as well as some memory mapped IO. That means that, if you
145 have a large amount of physical memory and/or IO, not all of the
146 memory can be "permanently mapped" by the kernel. The physical
147 memory that is not permanently mapped is called "high memory".
151 config LOWMEM_SIZE_BOOL
152 bool "Set maximum low memory"
153 depends on ADVANCED_OPTIONS
155 This option allows you to set the maximum amount of memory which
156 will be used as "low memory", that is, memory which the kernel can
157 access directly, without having to set up a kernel virtual mapping.
158 This can be useful in optimizing the layout of kernel virtual
161 Say N here unless you know what you are doing.
164 hex "Maximum low memory size (in bytes)" if LOWMEM_SIZE_BOOL
167 config MANUAL_RESET_VECTOR
168 hex "Microblaze reset vector address setup"
171 Set this option to have the kernel override the CPU Reset vector.
172 If zero, no change will be made to the MicroBlaze reset vector at
174 If non-zero, a jump instruction to this address, will be written
175 to the reset vector at address 0x0.
176 If you are unsure, set it to default value 0x0.
178 config KERNEL_START_BOOL
179 bool "Set custom kernel base address"
180 depends on ADVANCED_OPTIONS
182 This option allows you to set the kernel virtual address at which
183 the kernel will map low memory (the kernel image will be linked at
184 this address). This can be useful in optimizing the virtual memory
185 layout of the system.
187 Say N here unless you know what you are doing.
190 hex "Virtual address of kernel base" if KERNEL_START_BOOL
193 config TASK_SIZE_BOOL
194 bool "Set custom user task size"
195 depends on ADVANCED_OPTIONS
197 This option allows you to set the amount of virtual address space
198 allocated to user tasks. This can be useful in optimizing the
199 virtual memory layout of the system.
201 Say N here unless you know what you are doing.
204 hex "Size of user task space" if TASK_SIZE_BOOL
208 bool "Support for Microblaze Manager"
209 depends on ADVANCED_OPTIONS
211 This option enables API for configuring the MicroBlaze manager
212 control register, which is consumed by the break handler to
215 Say N here unless you know what you are doing.
222 bool "Xilinx PCI host bridge support"