Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1 | Brutus is an evaluation platform for the SA1100 manufactured by Intel. |
| 2 | For more details, see: |
| 3 | |
| 4 | http://developer.intel.com/design/strong/applnots/sa1100lx/getstart.htm |
| 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 | |
| 63 | Please send patches to nico@cam.org |
| 64 | |
| 65 | Have Fun ! |
| 66 | |