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cfdbc2e1 VG |
1 | # |
2 | # Copyright (C) 2004, 2007-2010, 2011-2012 Synopsys, Inc. (www.synopsys.com) | |
3 | # | |
4 | # This program is free software; you can redistribute it and/or modify | |
5 | # it under the terms of the GNU General Public License version 2 as | |
6 | # published by the Free Software Foundation. | |
7 | # | |
8 | ||
9 | config ARC | |
10 | def_bool y | |
11 | select ARCH_NO_VIRT_TO_BUS | |
4adeefe1 | 12 | select CLONE_BACKWARDS |
cfdbc2e1 VG |
13 | # ARC Busybox based initramfs absolutely relies on DEVTMPFS for /dev |
14 | select DEVTMPFS if !INITRAMFS_SOURCE="" | |
15 | select GENERIC_ATOMIC64 | |
16 | select GENERIC_CLOCKEVENTS | |
17 | select GENERIC_FIND_FIRST_BIT | |
18 | # for now, we don't need GENERIC_IRQ_PROBE, CONFIG_GENERIC_IRQ_CHIP | |
19 | select GENERIC_IRQ_SHOW | |
bf90e1ea VG |
20 | select GENERIC_KERNEL_EXECVE |
21 | select GENERIC_KERNEL_THREAD | |
cfdbc2e1 | 22 | select GENERIC_PENDING_IRQ if SMP |
c3581039 | 23 | select GENERIC_SIGALTSTACK |
cfdbc2e1 VG |
24 | select GENERIC_SMP_IDLE_THREAD |
25 | select HAVE_GENERIC_HARDIRQS | |
c121c506 | 26 | select HAVE_MEMBLOCK |
999159a5 | 27 | select IRQ_DOMAIN |
cfdbc2e1 | 28 | select MODULES_USE_ELF_RELA |
c121c506 | 29 | select NO_BOOTMEM |
999159a5 VG |
30 | select OF |
31 | select OF_EARLY_FLATTREE | |
cfdbc2e1 VG |
32 | |
33 | config SCHED_OMIT_FRAME_POINTER | |
34 | def_bool y | |
35 | ||
36 | config GENERIC_CSUM | |
37 | def_bool y | |
38 | ||
39 | config RWSEM_GENERIC_SPINLOCK | |
40 | def_bool y | |
41 | ||
42 | config ARCH_FLATMEM_ENABLE | |
43 | def_bool y | |
44 | ||
45 | config MMU | |
46 | def_bool y | |
47 | ||
48 | config NO_IOPORT | |
49 | def_bool y | |
50 | ||
51 | config GENERIC_CALIBRATE_DELAY | |
52 | def_bool y | |
53 | ||
54 | config GENERIC_HWEIGHT | |
55 | def_bool y | |
56 | ||
57 | config BINFMT_ELF | |
58 | def_bool y | |
59 | ||
60 | config HAVE_LATENCYTOP_SUPPORT | |
61 | def_bool y | |
62 | ||
63 | config NO_DMA | |
64 | def_bool n | |
65 | ||
66 | source "init/Kconfig" | |
67 | source "kernel/Kconfig.freezer" | |
68 | ||
69 | menu "ARC Architecture Configuration" | |
70 | ||
71 | choice | |
72 | prompt "ARC Platform" | |
73 | default ARC_PLAT_FPGA_LEGACY | |
74 | ||
75 | config ARC_PLAT_FPGA_LEGACY | |
76 | bool "\"Legacy\" ARC FPGA dev platform" | |
77 | help | |
78 | Support for ARC development platforms, provided by Synopsys. | |
79 | These are based on FPGA or ISS. e.g. | |
80 | - ARCAngel4 | |
81 | - ML509 | |
82 | - MetaWare ISS | |
83 | ||
84 | #New platform adds here | |
85 | endchoice | |
86 | ||
87 | menu "ARC CPU Configuration" | |
88 | ||
89 | choice | |
90 | prompt "ARC Core" | |
91 | default ARC_CPU_770 | |
92 | ||
93 | config ARC_CPU_750D | |
94 | bool "ARC750D" | |
95 | help | |
96 | Support for ARC750 core | |
97 | ||
98 | config ARC_CPU_770 | |
99 | bool "ARC770" | |
100 | select ARC_CPU_REL_4_10 | |
101 | help | |
102 | Support for ARC770 core introduced with Rel 4.10 (Summer 2011) | |
103 | This core has a bunch of cool new features: | |
104 | -MMU-v3: Variable Page Sz (4k, 8k, 16k), bigger J-TLB (128x4) | |
105 | Shared Address Spaces (for sharing TLB entires in MMU) | |
106 | -Caches: New Prog Model, Region Flush | |
107 | -Insns: endian swap, load-locked/store-conditional, time-stamp-ctr | |
108 | ||
109 | endchoice | |
110 | ||
111 | config CPU_BIG_ENDIAN | |
112 | bool "Enable Big Endian Mode" | |
113 | default n | |
114 | help | |
115 | Build kernel for Big Endian Mode of ARC CPU | |
116 | ||
117 | menuconfig ARC_CACHE | |
118 | bool "Enable Cache Support" | |
119 | default y | |
120 | ||
121 | if ARC_CACHE | |
122 | ||
123 | config ARC_CACHE_LINE_SHIFT | |
124 | int "Cache Line Length (as power of 2)" | |
125 | range 5 7 | |
126 | default "6" | |
127 | help | |
128 | Starting with ARC700 4.9, Cache line length is configurable, | |
129 | This option specifies "N", with Line-len = 2 power N | |
130 | So line lengths of 32, 64, 128 are specified by 5,6,7, respectively | |
131 | Linux only supports same line lengths for I and D caches. | |
132 | ||
133 | config ARC_HAS_ICACHE | |
134 | bool "Use Instruction Cache" | |
135 | default y | |
136 | ||
137 | config ARC_HAS_DCACHE | |
138 | bool "Use Data Cache" | |
139 | default y | |
140 | ||
141 | config ARC_CACHE_PAGES | |
142 | bool "Per Page Cache Control" | |
143 | default y | |
144 | depends on ARC_HAS_ICACHE || ARC_HAS_DCACHE | |
145 | help | |
146 | This can be used to over-ride the global I/D Cache Enable on a | |
147 | per-page basis (but only for pages accessed via MMU such as | |
148 | Kernel Virtual address or User Virtual Address) | |
149 | TLB entries have a per-page Cache Enable Bit. | |
150 | Note that Global I/D ENABLE + Per Page DISABLE works but corollary | |
151 | Global DISABLE + Per Page ENABLE won't work | |
152 | ||
153 | endif #ARC_CACHE | |
154 | ||
155 | config ARC_HAS_HW_MPY | |
156 | bool "Use Hardware Multiplier (Normal or Faster XMAC)" | |
157 | default y | |
158 | help | |
159 | Influences how gcc generates code for MPY operations. | |
160 | If enabled, MPYxx insns are generated, provided by Standard/XMAC | |
161 | Multipler. Otherwise software multipy lib is used | |
162 | ||
163 | choice | |
164 | prompt "ARC700 MMU Version" | |
165 | default ARC_MMU_V3 if ARC_CPU_770 | |
166 | default ARC_MMU_V2 if ARC_CPU_750D | |
167 | ||
168 | config ARC_MMU_V1 | |
169 | bool "MMU v1" | |
170 | help | |
171 | Orig ARC700 MMU | |
172 | ||
173 | config ARC_MMU_V2 | |
174 | bool "MMU v2" | |
175 | help | |
176 | Fixed the deficiency of v1 - possible thrashing in memcpy sceanrio | |
177 | when 2 D-TLB and 1 I-TLB entries index into same 2way set. | |
178 | ||
179 | config ARC_MMU_V3 | |
180 | bool "MMU v3" | |
181 | depends on ARC_CPU_770 | |
182 | help | |
183 | Introduced with ARC700 4.10: New Features | |
184 | Variable Page size (1k-16k), var JTLB size 128 x (2 or 4) | |
185 | Shared Address Spaces (SASID) | |
186 | ||
187 | endchoice | |
188 | ||
189 | ||
190 | choice | |
191 | prompt "MMU Page Size" | |
192 | default ARC_PAGE_SIZE_8K | |
193 | ||
194 | config ARC_PAGE_SIZE_8K | |
195 | bool "8KB" | |
196 | help | |
197 | Choose between 8k vs 16k | |
198 | ||
199 | config ARC_PAGE_SIZE_16K | |
200 | bool "16KB" | |
201 | depends on ARC_MMU_V3 | |
202 | ||
203 | config ARC_PAGE_SIZE_4K | |
204 | bool "4KB" | |
205 | depends on ARC_MMU_V3 | |
206 | ||
207 | endchoice | |
208 | ||
209 | config ARC_FPU_SAVE_RESTORE | |
210 | bool "Enable FPU state persistence across context switch" | |
211 | default n | |
212 | help | |
213 | Double Precision Floating Point unit had dedictaed regs which | |
214 | need to be saved/restored across context-switch. | |
215 | Note that ARC FPU is overly simplistic, unlike say x86, which has | |
216 | hardware pieces to allow software to conditionally save/restore, | |
217 | based on actual usage of FPU by a task. Thus our implemn does | |
218 | this for all tasks in system. | |
219 | ||
220 | menuconfig ARC_CPU_REL_4_10 | |
221 | bool "Enable support for Rel 4.10 features" | |
222 | default n | |
223 | help | |
224 | -ARC770 (and dependent features) enabled | |
225 | -ARC750 also shares some of the new features with 770 | |
226 | ||
227 | config ARC_HAS_LLSC | |
228 | bool "Insn: LLOCK/SCOND (efficient atomic ops)" | |
229 | default y | |
230 | depends on ARC_CPU_770 | |
231 | # if SMP, enable LLSC ONLY if ARC implementation has coherent atomics | |
232 | depends on !SMP || ARC_HAS_COH_LLSC | |
233 | ||
234 | config ARC_HAS_SWAPE | |
235 | bool "Insn: SWAPE (endian-swap)" | |
236 | default y | |
237 | depends on ARC_CPU_REL_4_10 | |
238 | ||
239 | config ARC_HAS_RTSC | |
240 | bool "Insn: RTSC (64-bit r/o cycle counter)" | |
241 | default y | |
242 | depends on ARC_CPU_REL_4_10 | |
243 | ||
244 | endmenu # "ARC CPU Configuration" | |
245 | ||
246 | menu "Platform Board Configuration" | |
247 | ||
248 | source "arch/arc/plat-arcfpga/Kconfig" | |
249 | ||
250 | #New platform adds here | |
251 | ||
cfdbc2e1 VG |
252 | config LINUX_LINK_BASE |
253 | hex "Linux Link Address" | |
254 | default "0x80000000" | |
255 | help | |
256 | ARC700 divides the 32 bit phy address space into two equal halves | |
257 | -Lower 2G (0 - 0x7FFF_FFFF ) is user virtual, translated by MMU | |
258 | -Upper 2G (0x8000_0000 onwards) is untranslated, for kernel | |
259 | Typically Linux kernel is linked at the start of untransalted addr, | |
260 | hence the default value of 0x8zs. | |
261 | However some customers have peripherals mapped at this addr, so | |
262 | Linux needs to be scooted a bit. | |
263 | If you don't know what the above means, leave this setting alone. | |
264 | ||
cfdbc2e1 VG |
265 | endmenu # "Platform Board Configuration" |
266 | ||
080c3747 VG |
267 | config ARC_CURR_IN_REG |
268 | bool "Dedicate Register r25 for current_task pointer" | |
269 | default y | |
270 | help | |
271 | This reserved Register R25 to point to Current Task in | |
272 | kernel mode. This saves memory access for each such access | |
273 | ||
cfdbc2e1 VG |
274 | config ARC_STACK_NONEXEC |
275 | bool "Make stack non-executable" | |
276 | default n | |
277 | help | |
278 | To disable the execute permissions of stack/heap of processes | |
279 | which are enabled by default. | |
280 | ||
281 | config HZ | |
282 | int "Timer Frequency" | |
283 | default 100 | |
284 | ||
285 | menuconfig ARC_DBG | |
286 | bool "ARC debugging" | |
287 | default y | |
288 | ||
289 | config ARC_DBG_TLB_PARANOIA | |
290 | bool "Paranoia Checks in Low Level TLB Handlers" | |
291 | depends on ARC_DBG | |
292 | default n | |
293 | ||
294 | config ARC_DBG_TLB_MISS_COUNT | |
295 | bool "Profile TLB Misses" | |
296 | default n | |
297 | select DEBUG_FS | |
298 | depends on ARC_DBG | |
299 | help | |
300 | Counts number of I and D TLB Misses and exports them via Debugfs | |
301 | The counters can be cleared via Debugfs as well | |
302 | ||
303 | config CMDLINE | |
304 | string "Kernel command line to built-in" | |
305 | default "print-fatal-signals=1" | |
306 | help | |
307 | The default command line which will be appended to the optional | |
308 | u-boot provided command line (see below) | |
309 | ||
310 | config CMDLINE_UBOOT | |
311 | bool "Support U-boot kernel command line passing" | |
312 | default n | |
313 | help | |
314 | If you are using U-boot (www.denx.de) and wish to pass the kernel | |
315 | command line from the U-boot environment to the Linux kernel then | |
316 | switch this option on. | |
317 | ARC U-boot will setup the cmdline in RAM/flash and set r2 to point | |
318 | to it. kernel startup code will copy the string into cmdline buffer | |
319 | and also append CONFIG_CMDLINE. | |
320 | ||
999159a5 VG |
321 | config ARC_BUILTIN_DTB_NAME |
322 | string "Built in DTB" | |
323 | help | |
324 | Set the name of the DTB to embed in the vmlinux binary | |
325 | Leaving it blank selects the minimal "skeleton" dtb | |
326 | ||
cfdbc2e1 VG |
327 | source "kernel/Kconfig.preempt" |
328 | ||
329 | endmenu # "ARC Architecture Configuration" | |
330 | ||
331 | source "mm/Kconfig" | |
332 | source "net/Kconfig" | |
333 | source "drivers/Kconfig" | |
334 | source "fs/Kconfig" | |
335 | source "arch/arc/Kconfig.debug" | |
336 | source "security/Kconfig" | |
337 | source "crypto/Kconfig" | |
338 | source "lib/Kconfig" |