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
24 select HAS_IOPORT if PCI
27 select HAVE_ARCH_SECCOMP
28 select HAVE_DEBUG_KMEMLEAK
29 select HAVE_DMA_CONTIGUOUS
30 select HAVE_DYNAMIC_FTRACE
31 select HAVE_FTRACE_MCOUNT_RECORD
32 select HAVE_FUNCTION_GRAPH_TRACER
33 select HAVE_FUNCTION_TRACER
37 select MODULES_USE_ELF_RELA
39 select OF_EARLY_FLATTREE
40 select PCI_DOMAINS_GENERIC if PCI
41 select PCI_SYSCALL if PCI
42 select CPU_NO_EFFICIENT_FFS
43 select MMU_GATHER_NO_RANGE
46 select TRACE_IRQFLAGS_SUPPORT
47 select GENERIC_IRQ_MULTI_HANDLER
49 # Endianness selection
51 prompt "Endianness selection"
52 default CPU_LITTLE_ENDIAN
54 microblaze architectures can be configured for either little or
55 big endian formats. Be sure to select the appropriate mode.
60 config CPU_LITTLE_ENDIAN
65 config ARCH_HAS_ILOG2_U32
68 config ARCH_HAS_ILOG2_U64
71 config GENERIC_HWEIGHT
74 config GENERIC_CALIBRATE_DELAY
80 config STACKTRACE_SUPPORT
83 config LOCKDEP_SUPPORT
86 source "arch/microblaze/Kconfig.platform"
88 menu "Processor type and features"
90 source "kernel/Kconfig.hz"
95 comment "Boot options"
98 bool "Default bootloader kernel arguments"
101 string "Default kernel command string"
102 depends on CMDLINE_BOOL
103 default "console=ttyUL0,115200"
105 On some architectures there is currently no way for the boot loader
106 to pass arguments to the kernel. For these architectures, you should
107 supply some command-line options at build time by entering them
111 bool "Force default kernel command string"
112 depends on CMDLINE_BOOL
115 Set this to have arguments from the default kernel command string
116 override those passed by the boot loader.
120 menu "Kernel features"
126 config ADVANCED_OPTIONS
127 bool "Prompt for advanced kernel configuration options"
129 This option will enable prompting for a variety of advanced kernel
130 configuration options. These options can cause the kernel to not
131 work if they are set incorrectly, but can be used to optimize certain
132 aspects of kernel memory management.
134 Unless you know what you are doing, say N here.
136 comment "Default settings for advanced configuration options are used"
137 depends on !ADVANCED_OPTIONS
140 bool "High memory support"
143 The address space of Microblaze processors is only 4 Gigabytes large
144 and it has to accommodate user address space, kernel address
145 space as well as some memory mapped IO. That means that, if you
146 have a large amount of physical memory and/or IO, not all of the
147 memory can be "permanently mapped" by the kernel. The physical
148 memory that is not permanently mapped is called "high memory".
152 config LOWMEM_SIZE_BOOL
153 bool "Set maximum low memory"
154 depends on ADVANCED_OPTIONS
156 This option allows you to set the maximum amount of memory which
157 will be used as "low memory", that is, memory which the kernel can
158 access directly, without having to set up a kernel virtual mapping.
159 This can be useful in optimizing the layout of kernel virtual
162 Say N here unless you know what you are doing.
165 hex "Maximum low memory size (in bytes)" if LOWMEM_SIZE_BOOL
168 config MANUAL_RESET_VECTOR
169 hex "Microblaze reset vector address setup"
172 Set this option to have the kernel override the CPU Reset vector.
173 If zero, no change will be made to the MicroBlaze reset vector at
175 If non-zero, a jump instruction to this address, will be written
176 to the reset vector at address 0x0.
177 If you are unsure, set it to default value 0x0.
179 config KERNEL_START_BOOL
180 bool "Set custom kernel base address"
181 depends on ADVANCED_OPTIONS
183 This option allows you to set the kernel virtual address at which
184 the kernel will map low memory (the kernel image will be linked at
185 this address). This can be useful in optimizing the virtual memory
186 layout of the system.
188 Say N here unless you know what you are doing.
191 hex "Virtual address of kernel base" if KERNEL_START_BOOL
194 config TASK_SIZE_BOOL
195 bool "Set custom user task size"
196 depends on ADVANCED_OPTIONS
198 This option allows you to set the amount of virtual address space
199 allocated to user tasks. This can be useful in optimizing the
200 virtual memory layout of the system.
202 Say N here unless you know what you are doing.
205 hex "Size of user task space" if TASK_SIZE_BOOL
209 bool "Support for Microblaze Manager"
210 depends on ADVANCED_OPTIONS
212 This option enables API for configuring the MicroBlaze manager
213 control register, which is consumed by the break handler to
216 Say N here unless you know what you are doing.