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1 | Brutus is an evaluation platform for the SA1100 manufactured by Intel. |
2 | For more details, see: | |
3 | ||
0ea6e611 | 4 | http://developer.intel.com |
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5 | |
6 | To compile for Brutus, you must issue the following commands: | |
7 | ||
8 | make brutus_config | |
9 | make config | |
10 | [accept all the defaults] | |
11 | make zImage | |
12 | ||
13 | The resulting kernel will end up in linux/arch/arm/boot/zImage. This file | |
14 | must be loaded at 0xc0008000 in Brutus's memory and execution started at | |
15 | 0xc0008000 as well with the value of registers r0 = 0 and r1 = 16 upon | |
16 | entry. | |
17 | ||
18 | But prior to execute the kernel, a ramdisk image must also be loaded in | |
19 | memory. Use memory address 0xd8000000 for this. Note that the file | |
20 | containing the (compressed) ramdisk image must not exceed 4 MB. | |
21 | ||
22 | Typically, you'll need angelboot to load the kernel. | |
23 | The following angelboot.opt file should be used: | |
24 | ||
25 | ----- begin angelboot.opt ----- | |
26 | base 0xc0008000 | |
27 | entry 0xc0008000 | |
28 | r0 0x00000000 | |
29 | r1 0x00000010 | |
30 | device /dev/ttyS0 | |
31 | options "9600 8N1" | |
32 | baud 115200 | |
33 | otherfile ramdisk_img.gz | |
34 | otherbase 0xd8000000 | |
35 | ----- end angelboot.opt ----- | |
36 | ||
37 | Then load the kernel and ramdisk with: | |
38 | ||
39 | angelboot -f angelboot.opt zImage | |
40 | ||
41 | The first Brutus serial port (assumed to be linked to /dev/ttyS0 on your | |
42 | host PC) is used by angel to load the kernel and ramdisk image. The serial | |
43 | console is provided through the second Brutus serial port. To access it, | |
44 | you may use minicom configured with /dev/ttyS1, 9600 baud, 8N1, no flow | |
45 | control. | |
46 | ||
47 | Currently supported: | |
48 | - RS232 serial ports | |
49 | - audio output | |
50 | - LCD screen | |
51 | - keyboard | |
52 | ||
53 | The actual Brutus support may not be complete without extra patches. | |
54 | If such patches exist, they should be found from | |
55 | ftp.netwinder.org/users/n/nico. | |
56 | ||
57 | A full PCMCIA support is still missing, although it's possible to hack | |
58 | some drivers in order to drive already inserted cards at boot time with | |
59 | little modifications. | |
60 | ||
61 | Any contribution is welcome. | |
62 | ||
2f82af08 | 63 | Please send patches to nico@fluxnic.net |
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64 | |
65 | Have Fun ! | |
66 |