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1 | ======================================= | |
2 | FUJITSU FR-V LINUX KERNEL CONFIGURATION | |
3 | ======================================= | |
4 | ||
5 | ===================== | |
6 | CONFIGURATION OPTIONS | |
7 | ===================== | |
8 | ||
9 | The most important setting is in the "MMU support options" tab (the first | |
10 | presented in the configuration tools available): | |
11 | ||
12 | (*) "Kernel Type" | |
13 | ||
14 | This options allows selection of normal, MMU-requiring linux, and uClinux | |
15 | (which doesn't require an MMU and doesn't have inter-process protection). | |
16 | ||
17 | There are a number of settings in the "Processor type and features" section of | |
18 | the kernel configuration that need to be considered. | |
19 | ||
20 | (*) "CPU" | |
21 | ||
22 | The register and instruction sets at the core of the processor. This can | |
23 | only be set to "FR40x/45x/55x" at the moment - but this permits usage of | |
24 | the kernel with MB93091 CB10, CB11, CB30, CB41, CB60, CB70 and CB451 | |
25 | CPU boards, and with the MB93093 PDK board. | |
26 | ||
27 | (*) "System" | |
28 | ||
29 | This option allows a choice of basic system. This governs the peripherals | |
30 | that are expected to be available. | |
31 | ||
32 | (*) "Motherboard" | |
33 | ||
34 | This specifies the type of motherboard being used, and the peripherals | |
35 | upon it. Currently only "MB93090-MB00" can be set here. | |
36 | ||
37 | (*) "Default cache-write mode" | |
38 | ||
39 | This controls the initial data cache write management mode. By default | |
40 | Write-Through is selected, but Write-Back (Copy-Back) can also be | |
41 | selected. This can be changed dynamically once the kernel is running (see | |
42 | features.txt). | |
43 | ||
44 | There are some architecture specific configuration options in the "General | |
45 | Setup" section of the kernel configuration too: | |
46 | ||
47 | (*) "Reserve memory uncached for (PCI) DMA" | |
48 | ||
49 | This requests that a uClinux kernel set aside some memory in an uncached | |
50 | window for the use as consistent DMA memory (mainly for PCI). At least a | |
51 | megabyte will be allocated in this way, possibly more. Any memory so | |
52 | reserved will not be available for normal allocations. | |
53 | ||
54 | (*) "Kernel support for ELF-FDPIC binaries" | |
55 | ||
56 | This enables the binary-format driver for the new FDPIC ELF binaries that | |
57 | this platform normally uses. These binaries are totally relocatable - | |
58 | their separate sections can relocated independently, allowing them to be | |
59 | shared on uClinux where possible. This should normally be enabled. | |
60 | ||
61 | (*) "Kernel image protection" | |
62 | ||
63 | This makes the protection register governing access to the core kernel | |
64 | image prohibit access by userspace programs. This option is available on | |
65 | uClinux only. | |
66 | ||
67 | There are also a number of settings in the "Kernel Hacking" section of the | |
68 | kernel configuration especially for debugging a kernel on this | |
69 | architecture. See the "gdbstub.txt" file for information about those. | |
70 | ||
71 | ||
72 | ====================== | |
73 | DEFAULT CONFIGURATIONS | |
74 | ====================== | |
75 | ||
76 | The kernel sources include a number of example default configurations: | |
77 | ||
78 | (*) defconfig-mb93091 | |
79 | ||
80 | Default configuration for the MB93091-VDK with both CPU board and | |
81 | MB93090-MB00 motherboard running uClinux. | |
82 | ||
83 | ||
84 | (*) defconfig-mb93091-fb | |
85 | ||
86 | Default configuration for the MB93091-VDK with CPU board, | |
87 | MB93090-MB00 motherboard, and DAV board running uClinux. | |
88 | Includes framebuffer driver. | |
89 | ||
90 | ||
91 | (*) defconfig-mb93093 | |
92 | ||
93 | Default configuration for the MB93093-PDK board running uClinux. | |
94 | ||
95 | ||
96 | (*) defconfig-cb70-standalone | |
97 | ||
98 | Default configuration for the MB93091-VDK with only CB70 CPU board | |
99 | running uClinux. This will use the CB70's DM9000 for network access. | |
100 | ||
101 | ||
102 | (*) defconfig-mmu | |
103 | ||
104 | Default configuration for the MB93091-VDK with both CB451 CPU board and | |
105 | MB93090-MB00 motherboard running MMU linux. | |
106 | ||
107 | (*) defconfig-mmu-audio | |
108 | ||
109 | Default configuration for the MB93091-VDK with CB451 CPU board, DAV | |
110 | board, and MB93090-MB00 motherboard running MMU linux. Includes | |
111 | audio driver. | |
112 | ||
113 | (*) defconfig-mmu-fb | |
114 | ||
115 | Default configuration for the MB93091-VDK with CB451 CPU board, DAV | |
116 | board, and MB93090-MB00 motherboard running MMU linux. Includes | |
117 | framebuffer driver. | |
118 | ||
119 | (*) defconfig-mmu-standalone | |
120 | ||
121 | Default configuration for the MB93091-VDK with only CB451 CPU board | |
122 | running MMU linux. | |
123 | ||
124 | ||
125 |