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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 | |
12 | # ARC Busybox based initramfs absolutely relies on DEVTMPFS for /dev | |
13 | select DEVTMPFS if !INITRAMFS_SOURCE="" | |
14 | select GENERIC_ATOMIC64 | |
15 | select GENERIC_CLOCKEVENTS | |
16 | select GENERIC_FIND_FIRST_BIT | |
17 | # for now, we don't need GENERIC_IRQ_PROBE, CONFIG_GENERIC_IRQ_CHIP | |
18 | select GENERIC_IRQ_SHOW | |
19 | select GENERIC_PENDING_IRQ if SMP | |
20 | select GENERIC_SMP_IDLE_THREAD | |
21 | select HAVE_GENERIC_HARDIRQS | |
22 | select MODULES_USE_ELF_RELA | |
23 | ||
24 | config SCHED_OMIT_FRAME_POINTER | |
25 | def_bool y | |
26 | ||
27 | config GENERIC_CSUM | |
28 | def_bool y | |
29 | ||
30 | config RWSEM_GENERIC_SPINLOCK | |
31 | def_bool y | |
32 | ||
33 | config ARCH_FLATMEM_ENABLE | |
34 | def_bool y | |
35 | ||
36 | config MMU | |
37 | def_bool y | |
38 | ||
39 | config NO_IOPORT | |
40 | def_bool y | |
41 | ||
42 | config GENERIC_CALIBRATE_DELAY | |
43 | def_bool y | |
44 | ||
45 | config GENERIC_HWEIGHT | |
46 | def_bool y | |
47 | ||
48 | config BINFMT_ELF | |
49 | def_bool y | |
50 | ||
51 | config HAVE_LATENCYTOP_SUPPORT | |
52 | def_bool y | |
53 | ||
54 | config NO_DMA | |
55 | def_bool n | |
56 | ||
57 | source "init/Kconfig" | |
58 | source "kernel/Kconfig.freezer" | |
59 | ||
60 | menu "ARC Architecture Configuration" | |
61 | ||
62 | choice | |
63 | prompt "ARC Platform" | |
64 | default ARC_PLAT_FPGA_LEGACY | |
65 | ||
66 | config ARC_PLAT_FPGA_LEGACY | |
67 | bool "\"Legacy\" ARC FPGA dev platform" | |
68 | help | |
69 | Support for ARC development platforms, provided by Synopsys. | |
70 | These are based on FPGA or ISS. e.g. | |
71 | - ARCAngel4 | |
72 | - ML509 | |
73 | - MetaWare ISS | |
74 | ||
75 | #New platform adds here | |
76 | endchoice | |
77 | ||
78 | menu "ARC CPU Configuration" | |
79 | ||
80 | choice | |
81 | prompt "ARC Core" | |
82 | default ARC_CPU_770 | |
83 | ||
84 | config ARC_CPU_750D | |
85 | bool "ARC750D" | |
86 | help | |
87 | Support for ARC750 core | |
88 | ||
89 | config ARC_CPU_770 | |
90 | bool "ARC770" | |
91 | select ARC_CPU_REL_4_10 | |
92 | help | |
93 | Support for ARC770 core introduced with Rel 4.10 (Summer 2011) | |
94 | This core has a bunch of cool new features: | |
95 | -MMU-v3: Variable Page Sz (4k, 8k, 16k), bigger J-TLB (128x4) | |
96 | Shared Address Spaces (for sharing TLB entires in MMU) | |
97 | -Caches: New Prog Model, Region Flush | |
98 | -Insns: endian swap, load-locked/store-conditional, time-stamp-ctr | |
99 | ||
100 | endchoice | |
101 | ||
102 | config CPU_BIG_ENDIAN | |
103 | bool "Enable Big Endian Mode" | |
104 | default n | |
105 | help | |
106 | Build kernel for Big Endian Mode of ARC CPU | |
107 | ||
108 | menuconfig ARC_CACHE | |
109 | bool "Enable Cache Support" | |
110 | default y | |
111 | ||
112 | if ARC_CACHE | |
113 | ||
114 | config ARC_CACHE_LINE_SHIFT | |
115 | int "Cache Line Length (as power of 2)" | |
116 | range 5 7 | |
117 | default "6" | |
118 | help | |
119 | Starting with ARC700 4.9, Cache line length is configurable, | |
120 | This option specifies "N", with Line-len = 2 power N | |
121 | So line lengths of 32, 64, 128 are specified by 5,6,7, respectively | |
122 | Linux only supports same line lengths for I and D caches. | |
123 | ||
124 | config ARC_HAS_ICACHE | |
125 | bool "Use Instruction Cache" | |
126 | default y | |
127 | ||
128 | config ARC_HAS_DCACHE | |
129 | bool "Use Data Cache" | |
130 | default y | |
131 | ||
132 | config ARC_CACHE_PAGES | |
133 | bool "Per Page Cache Control" | |
134 | default y | |
135 | depends on ARC_HAS_ICACHE || ARC_HAS_DCACHE | |
136 | help | |
137 | This can be used to over-ride the global I/D Cache Enable on a | |
138 | per-page basis (but only for pages accessed via MMU such as | |
139 | Kernel Virtual address or User Virtual Address) | |
140 | TLB entries have a per-page Cache Enable Bit. | |
141 | Note that Global I/D ENABLE + Per Page DISABLE works but corollary | |
142 | Global DISABLE + Per Page ENABLE won't work | |
143 | ||
144 | endif #ARC_CACHE | |
145 | ||
146 | config ARC_HAS_HW_MPY | |
147 | bool "Use Hardware Multiplier (Normal or Faster XMAC)" | |
148 | default y | |
149 | help | |
150 | Influences how gcc generates code for MPY operations. | |
151 | If enabled, MPYxx insns are generated, provided by Standard/XMAC | |
152 | Multipler. Otherwise software multipy lib is used | |
153 | ||
154 | choice | |
155 | prompt "ARC700 MMU Version" | |
156 | default ARC_MMU_V3 if ARC_CPU_770 | |
157 | default ARC_MMU_V2 if ARC_CPU_750D | |
158 | ||
159 | config ARC_MMU_V1 | |
160 | bool "MMU v1" | |
161 | help | |
162 | Orig ARC700 MMU | |
163 | ||
164 | config ARC_MMU_V2 | |
165 | bool "MMU v2" | |
166 | help | |
167 | Fixed the deficiency of v1 - possible thrashing in memcpy sceanrio | |
168 | when 2 D-TLB and 1 I-TLB entries index into same 2way set. | |
169 | ||
170 | config ARC_MMU_V3 | |
171 | bool "MMU v3" | |
172 | depends on ARC_CPU_770 | |
173 | help | |
174 | Introduced with ARC700 4.10: New Features | |
175 | Variable Page size (1k-16k), var JTLB size 128 x (2 or 4) | |
176 | Shared Address Spaces (SASID) | |
177 | ||
178 | endchoice | |
179 | ||
180 | ||
181 | choice | |
182 | prompt "MMU Page Size" | |
183 | default ARC_PAGE_SIZE_8K | |
184 | ||
185 | config ARC_PAGE_SIZE_8K | |
186 | bool "8KB" | |
187 | help | |
188 | Choose between 8k vs 16k | |
189 | ||
190 | config ARC_PAGE_SIZE_16K | |
191 | bool "16KB" | |
192 | depends on ARC_MMU_V3 | |
193 | ||
194 | config ARC_PAGE_SIZE_4K | |
195 | bool "4KB" | |
196 | depends on ARC_MMU_V3 | |
197 | ||
198 | endchoice | |
199 | ||
200 | config ARC_FPU_SAVE_RESTORE | |
201 | bool "Enable FPU state persistence across context switch" | |
202 | default n | |
203 | help | |
204 | Double Precision Floating Point unit had dedictaed regs which | |
205 | need to be saved/restored across context-switch. | |
206 | Note that ARC FPU is overly simplistic, unlike say x86, which has | |
207 | hardware pieces to allow software to conditionally save/restore, | |
208 | based on actual usage of FPU by a task. Thus our implemn does | |
209 | this for all tasks in system. | |
210 | ||
211 | menuconfig ARC_CPU_REL_4_10 | |
212 | bool "Enable support for Rel 4.10 features" | |
213 | default n | |
214 | help | |
215 | -ARC770 (and dependent features) enabled | |
216 | -ARC750 also shares some of the new features with 770 | |
217 | ||
218 | config ARC_HAS_LLSC | |
219 | bool "Insn: LLOCK/SCOND (efficient atomic ops)" | |
220 | default y | |
221 | depends on ARC_CPU_770 | |
222 | # if SMP, enable LLSC ONLY if ARC implementation has coherent atomics | |
223 | depends on !SMP || ARC_HAS_COH_LLSC | |
224 | ||
225 | config ARC_HAS_SWAPE | |
226 | bool "Insn: SWAPE (endian-swap)" | |
227 | default y | |
228 | depends on ARC_CPU_REL_4_10 | |
229 | ||
230 | config ARC_HAS_RTSC | |
231 | bool "Insn: RTSC (64-bit r/o cycle counter)" | |
232 | default y | |
233 | depends on ARC_CPU_REL_4_10 | |
234 | ||
235 | endmenu # "ARC CPU Configuration" | |
236 | ||
237 | menu "Platform Board Configuration" | |
238 | ||
239 | source "arch/arc/plat-arcfpga/Kconfig" | |
240 | ||
241 | #New platform adds here | |
242 | ||
243 | config ARC_PLAT_CLK | |
244 | int "Clk speed in Hz" | |
245 | default "80000000" | |
246 | ||
247 | config LINUX_LINK_BASE | |
248 | hex "Linux Link Address" | |
249 | default "0x80000000" | |
250 | help | |
251 | ARC700 divides the 32 bit phy address space into two equal halves | |
252 | -Lower 2G (0 - 0x7FFF_FFFF ) is user virtual, translated by MMU | |
253 | -Upper 2G (0x8000_0000 onwards) is untranslated, for kernel | |
254 | Typically Linux kernel is linked at the start of untransalted addr, | |
255 | hence the default value of 0x8zs. | |
256 | However some customers have peripherals mapped at this addr, so | |
257 | Linux needs to be scooted a bit. | |
258 | If you don't know what the above means, leave this setting alone. | |
259 | ||
260 | config ARC_PLAT_SDRAM_SIZE | |
261 | hex "SD RAM Size" | |
262 | default "0x10000000" | |
263 | help | |
264 | Implies the amount of SDRAM/DRAM Linux is going to claim/own. | |
265 | The actual memory itself could be larger than this number. But for | |
266 | all software purposes, this is the amt of memory. | |
267 | ||
268 | endmenu # "Platform Board Configuration" | |
269 | ||
270 | config ARC_STACK_NONEXEC | |
271 | bool "Make stack non-executable" | |
272 | default n | |
273 | help | |
274 | To disable the execute permissions of stack/heap of processes | |
275 | which are enabled by default. | |
276 | ||
277 | config HZ | |
278 | int "Timer Frequency" | |
279 | default 100 | |
280 | ||
281 | menuconfig ARC_DBG | |
282 | bool "ARC debugging" | |
283 | default y | |
284 | ||
285 | config ARC_DBG_TLB_PARANOIA | |
286 | bool "Paranoia Checks in Low Level TLB Handlers" | |
287 | depends on ARC_DBG | |
288 | default n | |
289 | ||
290 | config ARC_DBG_TLB_MISS_COUNT | |
291 | bool "Profile TLB Misses" | |
292 | default n | |
293 | select DEBUG_FS | |
294 | depends on ARC_DBG | |
295 | help | |
296 | Counts number of I and D TLB Misses and exports them via Debugfs | |
297 | The counters can be cleared via Debugfs as well | |
298 | ||
299 | config CMDLINE | |
300 | string "Kernel command line to built-in" | |
301 | default "print-fatal-signals=1" | |
302 | help | |
303 | The default command line which will be appended to the optional | |
304 | u-boot provided command line (see below) | |
305 | ||
306 | config CMDLINE_UBOOT | |
307 | bool "Support U-boot kernel command line passing" | |
308 | default n | |
309 | help | |
310 | If you are using U-boot (www.denx.de) and wish to pass the kernel | |
311 | command line from the U-boot environment to the Linux kernel then | |
312 | switch this option on. | |
313 | ARC U-boot will setup the cmdline in RAM/flash and set r2 to point | |
314 | to it. kernel startup code will copy the string into cmdline buffer | |
315 | and also append CONFIG_CMDLINE. | |
316 | ||
317 | source "kernel/Kconfig.preempt" | |
318 | ||
319 | endmenu # "ARC Architecture Configuration" | |
320 | ||
321 | source "mm/Kconfig" | |
322 | source "net/Kconfig" | |
323 | source "drivers/Kconfig" | |
324 | source "fs/Kconfig" | |
325 | source "arch/arc/Kconfig.debug" | |
326 | source "security/Kconfig" | |
327 | source "crypto/Kconfig" | |
328 | source "lib/Kconfig" |