1 .. SPDX-License-Identifier: GPL-2.0
2
3 Linux kernel for ARC processors
4 *******************************
5
6 Other sources of information
7 ############################
8
9 Below are some resources where more informatio
10 ARC processors and relevant open source projec
11
12 - `<https://embarc.org>`_ - Community portal f
13 Good place to start to find relevant FOSS pr
14 news items and more.
15
16 - `<https://github.com/foss-for-synopsys-dwc-a
17 Home for all development activities regardin
18 ARC processors. Some of the projects are for
19 where "work in progress" is hosted prior to
20 Other projects are developed by Synopsys and
21 as open source for use on ARC Processors.
22
23 - `Official Synopsys ARC Processors website
24 <https://www.synopsys.com/designware-ip/proc
25 location, with access to some IP documentati
26 Manual, AKA PRM for ARC HS processors
27 <https://www.synopsys.com/dw/doc.php/ds/cc/p
28 and free versions of some commercial tools (
29 <https://www.synopsys.com/cgi-bin/dwarcnsim/
30 `MetaWare Light Edition <https://www.synopsy
31 Please note though, registration is required
32 the tools.
33
34 Important note on ARC processors configurabili
35 ##############################################
36
37 ARC processors are highly configurable and sev
38 are supported in Linux. Some options are trans
39 (i.e cache geometries, some can be detected at
40 and used accordingly, while some need to be ex
41 in the kernel's configuration utility (AKA "ma
42
43 However not all configurable options are suppo
44 is to run Linux. SoC design teams should refer
45 Configuration for ARC Linux" in the ARC HS Dat
46 guidelines.
47
48 Following these guidelines and selecting valid
49 up front is critical to help prevent any unwan
50 SoC bringup and software development in genera
51
52 Building the Linux kernel for ARC processors
53 ############################################
54
55 The process of kernel building for ARC process
56 architecture and could be done in 2 ways:
57
58 - Cross-compilation: process of compiling for
59 host with a different processor architecture
60 - Native compilation: process of compiling for
61 (hardware board or a simulator like QEMU) wi
62 (GNU toolchain, dtc, make etc) installed on
63
64 In both cases, up-to-date GNU toolchain for AR
65 Synopsys offers prebuilt toolchain releases wh
66 available from:
67
68 - Synopsys GNU toolchain releases:
69 `<https://github.com/foss-for-synopsys-dwc-a
70
71 - Linux kernel compilers collection:
72 `<https://mirrors.edge.kernel.org/pub/tools/
73
74 - Bootlin's toolchain collection: `<https://to
75
76 Once the toolchain is installed in the system,
77 is added in your ``PATH`` environment variable
78 ``CROSS_COMPILE=arc-linux`` (or whatever match
79 and then as usual ``make defconfig && make``.
80
81 This will produce "vmlinux" file in the root o
82 usable for loading on the target system via JT
83 If you need to get an image usable with U-Boot
84 type ``make uImage`` and ``uImage`` will be pr
85 folder.
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