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b2441318 | 1 | # SPDX-License-Identifier: GPL-2.0 |
2fc8483f LFT |
2 | config NIOS2 |
3 | def_bool y | |
942fa985 | 4 | select ARCH_32BIT_OFF_T |
fa7e2247 | 5 | select ARCH_HAS_DMA_PREP_COHERENT |
25622e04 CH |
6 | select ARCH_HAS_SYNC_DMA_FOR_CPU |
7 | select ARCH_HAS_SYNC_DMA_FOR_DEVICE | |
fa7e2247 | 8 | select ARCH_HAS_DMA_SET_UNCACHED |
17c46a6a | 9 | select ARCH_NO_SWAP |
f26e4331 | 10 | select COMMON_CLK |
bb0eb050 | 11 | select TIMER_OF |
2fc8483f | 12 | select GENERIC_ATOMIC64 |
2fc8483f LFT |
13 | select GENERIC_CPU_DEVICES |
14 | select GENERIC_IRQ_PROBE | |
15 | select GENERIC_IRQ_SHOW | |
16 | select HAVE_ARCH_TRACEHOOK | |
d16d2be1 | 17 | select HAVE_ARCH_KGDB |
2fc8483f LFT |
18 | select IRQ_DOMAIN |
19 | select MODULES_USE_ELF_RELA | |
20 | select OF | |
21 | select OF_EARLY_FLATTREE | |
22 | select SOC_BUS | |
23 | select SPARSE_IRQ | |
24 | select USB_ARCH_HAS_HCD if USB_SUPPORT | |
fff7fb0b | 25 | select CPU_NO_EFFICIENT_FFS |
6137fed0 | 26 | select MMU_GATHER_NO_RANGE if MMU |
2fc8483f LFT |
27 | |
28 | config GENERIC_CSUM | |
29 | def_bool y | |
30 | ||
31 | config GENERIC_HWEIGHT | |
32 | def_bool y | |
33 | ||
34 | config GENERIC_CALIBRATE_DELAY | |
35 | def_bool y | |
36 | ||
37 | config NO_IOPORT_MAP | |
38 | def_bool y | |
39 | ||
2fc8483f LFT |
40 | config FPU |
41 | def_bool n | |
42 | ||
2fc8483f LFT |
43 | menu "Kernel features" |
44 | ||
2fc8483f LFT |
45 | source "kernel/Kconfig.hz" |
46 | ||
2fc8483f LFT |
47 | config FORCE_MAX_ZONEORDER |
48 | int "Maximum zone order" | |
49 | range 9 20 | |
50 | default "11" | |
51 | help | |
52 | The kernel memory allocator divides physically contiguous memory | |
53 | blocks into "zones", where each zone is a power of two number of | |
54 | pages. This option selects the largest power of two that the kernel | |
55 | keeps in the memory allocator. If you need to allocate very large | |
56 | blocks of physically contiguous memory, then you may need to | |
57 | increase this value. | |
58 | ||
59 | This config option is actually maximum order plus one. For example, | |
60 | a value of 11 means that the largest free memory block is 2^10 pages. | |
61 | ||
62 | endmenu | |
63 | ||
64 | source "arch/nios2/platform/Kconfig.platform" | |
65 | ||
66 | menu "Processor type and features" | |
67 | ||
68 | config MMU | |
69 | def_bool y | |
70 | ||
6e5c8f5f TK |
71 | config NR_CPUS |
72 | int | |
73 | default "1" | |
74 | ||
2fc8483f LFT |
75 | config NIOS2_ALIGNMENT_TRAP |
76 | bool "Catch alignment trap" | |
77 | default y | |
78 | help | |
79 | Nios II CPUs cannot fetch/store data which is not bus aligned, | |
80 | i.e., a 2 or 4 byte fetch must start at an address divisible by | |
81 | 2 or 4. Any non-aligned load/store instructions will be trapped and | |
82 | emulated in software if you say Y here, which has a performance | |
83 | impact. | |
84 | ||
85 | comment "Boot options" | |
86 | ||
87 | config CMDLINE_BOOL | |
88 | bool "Default bootloader kernel arguments" | |
89 | default y | |
90 | ||
91 | config CMDLINE | |
92 | string "Default kernel command string" | |
93 | default "" | |
94 | depends on CMDLINE_BOOL | |
95 | help | |
96 | On some platforms, there is currently no way for the boot loader to | |
97 | pass arguments to the kernel. For these platforms, you can supply | |
98 | some command-line options at build time by entering them here. In | |
99 | other cases you can specify kernel args so that you don't have | |
100 | to set them up in board prom initialization routines. | |
101 | ||
102 | config CMDLINE_FORCE | |
103 | bool "Force default kernel command string" | |
104 | depends on CMDLINE_BOOL | |
105 | help | |
106 | Set this to have arguments from the default kernel command string | |
107 | override those passed by the boot loader. | |
108 | ||
109 | config NIOS2_CMDLINE_IGNORE_DTB | |
110 | bool "Ignore kernel command string from DTB" | |
2b2b4074 | 111 | depends on CMDLINE_BOOL |
2fc8483f LFT |
112 | depends on !CMDLINE_FORCE |
113 | default y | |
114 | help | |
115 | Set this to ignore the bootargs property from the devicetree's | |
116 | chosen node and fall back to CMDLINE if nothing is passed. | |
117 | ||
118 | config NIOS2_PASS_CMDLINE | |
119 | bool "Passed kernel command line from u-boot" | |
2fc8483f LFT |
120 | help |
121 | Use bootargs env variable from u-boot for kernel command line. | |
122 | will override "Default kernel command string". | |
123 | Say N if you are unsure. | |
124 | ||
01623627 LFT |
125 | config NIOS2_BOOT_LINK_OFFSET |
126 | hex "Link address offset for booting" | |
127 | default "0x00500000" | |
128 | help | |
129 | This option allows you to set the link address offset of the zImage. | |
130 | This can be useful if you are on a board which has a small amount of | |
131 | memory. | |
132 | ||
2fc8483f LFT |
133 | endmenu |
134 | ||
135 | menu "Advanced setup" | |
136 | ||
137 | config ADVANCED_OPTIONS | |
138 | bool "Prompt for advanced kernel configuration options" | |
2fc8483f LFT |
139 | |
140 | comment "Default settings for advanced configuration options are used" | |
141 | depends on !ADVANCED_OPTIONS | |
142 | ||
143 | config NIOS2_KERNEL_MMU_REGION_BASE_BOOL | |
144 | bool "Set custom kernel MMU region base address" | |
145 | depends on ADVANCED_OPTIONS | |
146 | help | |
147 | This option allows you to set the virtual address of the kernel MMU region. | |
148 | ||
149 | Say N here unless you know what you are doing. | |
150 | ||
151 | config NIOS2_KERNEL_MMU_REGION_BASE | |
152 | hex "Virtual base address of the kernel MMU region " if NIOS2_KERNEL_MMU_REGION_BASE_BOOL | |
153 | default "0x80000000" | |
154 | help | |
155 | This option allows you to set the virtual base address of the kernel MMU region. | |
156 | ||
157 | config NIOS2_KERNEL_REGION_BASE_BOOL | |
158 | bool "Set custom kernel region base address" | |
159 | depends on ADVANCED_OPTIONS | |
160 | help | |
161 | This option allows you to set the virtual address of the kernel region. | |
162 | ||
163 | Say N here unless you know what you are doing. | |
164 | ||
165 | config NIOS2_KERNEL_REGION_BASE | |
166 | hex "Virtual base address of the kernel region " if NIOS2_KERNEL_REGION_BASE_BOOL | |
167 | default "0xc0000000" | |
168 | ||
169 | config NIOS2_IO_REGION_BASE_BOOL | |
170 | bool "Set custom I/O region base address" | |
171 | depends on ADVANCED_OPTIONS | |
172 | help | |
173 | This option allows you to set the virtual address of the I/O region. | |
174 | ||
175 | Say N here unless you know what you are doing. | |
176 | ||
177 | config NIOS2_IO_REGION_BASE | |
178 | hex "Virtual base address of the I/O region" if NIOS2_IO_REGION_BASE_BOOL | |
179 | default "0xe0000000" | |
180 | ||
181 | endmenu |