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<meino.cramer <at> gmx.de> writes: |
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> Gentoo, I need a little help in choosing the correct stage3 |
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> image/archive (currently the board is on the way to me...). |
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> The processor of the board is a AT91SAM9G25 (softloater, no FPU or |
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> similiar) and the available stage3 images/archives are (as of my |
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> knowledge): |
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Have you looked at the "boards section" of the gentoo embedded handbook. |
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It's a great place to find similar boards/processors where folks |
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have run embedded gentoo. |
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https://www.gentoo.org/proj/en/base/embedded/handbook/?part=4&chap=5#doc_chap2 |
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Look in the beginning of each board for CPU similar to yours |
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to get some ideas. |
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> lrwxrwxrwx 1 1000 1000 8 Nov 08 00:30 |
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current-stage3-armv4tl -> 20141026 |
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> lrwxrwxrwx 1 1000 1000 8 Nov 08 00:30 |
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current-stage3-armv5tel -> 20141025 |
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> lrwxrwxrwx 1 1000 1000 8 Nov 08 00:30 |
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current-stage3-armv6j -> 20141025 |
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> lrwxrwxrwx 1 1000 1000 8 Nov 08 00:30 |
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current-stage3-armv6j_hardfp -> 20141024 |
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> lrwxrwxrwx 1 1000 1000 8 Nov 08 00:30 |
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current-stage3-armv7a -> 20141024 |
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> lrwxrwxrwx 1 1000 1000 8 Nov 08 00:30 |
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current-stage3-armv7a_hardfp -> 20141023 |
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> |
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> The *hardfp* images/archives are not the correct ones...but the |
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> armv<n> thingy makes me a little nervous: Up to now I didn't find a |
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> clue, of what version the AT91SAM9G25 is... |
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http://www.atmel.com/devices/sam9g25.aspx?tab=documents |
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Atmel is pretty much a great company. Google for the specific version |
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of the CPU you have and the term "Atmel" and you should get |
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lots of stuff. Do not limit your searches with the gentoo keyword. |
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> What stage3 I should use? |
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Something with softfloat, if the cpu does not actuall have a hardware |
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Floating Point unit. |
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Also, on your local gentoo system go to /usr/portage/dev-embedded |
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and poke around: dev-embedded/avarice for example might be |
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useful. |
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Also google for overlays. Atmel likely has extensive |
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information around the net. Even if you run "embedded gentoo" |
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on the hardware, other embedded (not necessarily embedded linux) |
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sites will contain a wealth of codes to compile on your board. |
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Also look at "cross-compiling" and emulators. |
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Last, "Linaro" is pretty much state of the art in most things arm. |
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They are focused on massively parallel 64 bit arm codes, but much |
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is being "back-ported" to the older (smaller) arm CPUs that is |
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very cool. Many Android sites will have codes for all sorts of |
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arm devices too. It's like looking for the "leprecaun" that |
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wants to be found...... |
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Don't be reluctant to boot up a binary to get it up and running, |
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particularly a well defined, non-linux RTOS. |
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http://www.digikey.com/catalog/en/partgroup/at91sam9g25-evaluation-board/35531 |
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You'll most likely find that other (smaller) companies have put |
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that specific Atmel-arm chip onto different dev boards with |
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a few differences, too. |
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http://www.aliexpress.com/item/Free-Shipping-1pc-MDK9G25-development-board-AT91SAM9G25-USB-2-0-high-speed-Ethernet-audio/1377330746.html |
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https://eewiki.net/display/linuxonarm/AT91SAM9x5 |
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Good Hunting! |
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James |
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