From: Danny Milosavljevic <dannym@scratchpost.org>
To: David Craven <david@craven.ch>
Cc: guix-devel <guix-devel@gnu.org>
Subject: Re: How does install-grub work?
Date: Mon, 29 Aug 2016 23:45:46 +0200 [thread overview]
Message-ID: <20160829234546.6fc60417@scratchpost.org> (raw)
In-Reply-To: <CAL1_immEYuftUMvopXCWpkQjpZO2DiHa57EAncCWBFJAouc2eA@mail.gmail.com>
On Mon, 29 Aug 2016 22:54:27 +0200
David Craven <david@craven.ch> wrote:
> for actual boards, isn't uboot usually written to flash instead of to a MBR?
That depends on the board - sometimes it's written to flash.
For Allwinner hardware, it's written to a fixed section (fixed sectors) on either a SD card or NAND flash or eMMC. It's not in the MBR but after it and before the first partition.
Many pieces of hardware have U-Boot as something like a BIOS - it's not meant to be updated. And if you do want to update it, you go to the U-Boot prompt and update it from within itself.
I think that's why the extlinux.conf exists in the first place - you just put it somewhere where the [potentially immutable forever] U-Boot can find it and it will pick it up (at least when the partition is marked Active).
Interestingly enough, the situation is similar with Libreboot and its integrated Grub. That's why I added comment in the source code that asks whether it makes sense to seperate the config storing part from the bootloader installation part - the latter can be unnecessary while the former can be very necessary at the same time.
next prev parent reply other threads:[~2016-08-29 21:45 UTC|newest]
Thread overview: 69+ messages / expand[flat|nested] mbox.gz Atom feed top
2016-08-05 18:37 [PATCH 02/12] import: utils: Symbols from 'license->symbol' have a license: prefix David Craven
2016-08-05 18:37 ` [PATCH 03/12] gnu: python: Import guix licenses with #:prefix license: David Craven
2016-08-05 18:37 ` [PATCH 04/12] gnu: python: Add python-binaryornot David Craven
2016-08-08 20:37 ` Leo Famulari
2016-08-22 12:05 ` David Craven
2016-08-22 12:14 ` David Craven
2016-08-22 13:20 ` [PATCH 01/11] import: utils: Symbols from 'license->symbol' have a license: prefix David Craven
2016-08-22 13:20 ` [PATCH 02/11] gnu: python: Import guix licenses with #:prefix license: David Craven
2016-08-26 20:55 ` David Craven
2016-08-22 13:20 ` [PATCH 03/11] gnu: Add python-binaryornot David Craven
2016-08-22 13:20 ` [PATCH 04/11] gnu: Add python-nltk David Craven
2016-08-27 8:39 ` Danny Milosavljevic
2016-10-24 21:15 ` Leo Famulari
2016-08-22 13:20 ` [PATCH 05/11] gnu: Add python-pymongo David Craven
2016-08-22 13:20 ` [PATCH 06/11] gnu: Add python-sh David Craven
2016-08-27 8:42 ` Danny Milosavljevic
2016-08-28 12:28 ` David Craven
2016-08-29 10:31 ` Guix with U-Boot Danny Milosavljevic
2016-08-29 11:25 ` David Craven
2016-08-29 14:12 ` David Craven
2016-08-29 14:19 ` Danny Milosavljevic
2016-08-29 16:51 ` David Craven
2016-08-29 17:20 ` Danny Milosavljevic
2016-08-29 17:52 ` Danny Milosavljevic
2016-08-29 18:10 ` Danny Milosavljevic
2016-08-29 17:38 ` Danny Milosavljevic
2016-08-29 18:16 ` Danny Milosavljevic
2016-08-29 18:20 ` David Craven
2016-08-29 18:56 ` David Craven
2016-08-29 19:04 ` Danny Milosavljevic
2016-08-29 18:57 ` How does install-grub work? Danny Milosavljevic
2016-08-29 20:29 ` David Craven
2016-08-29 20:50 ` Danny Milosavljevic
2016-08-29 20:54 ` David Craven
2016-08-29 21:19 ` David Craven
2016-08-29 21:57 ` Danny Milosavljevic
2016-08-29 22:00 ` David Craven
2016-08-29 22:14 ` Danny Milosavljevic
2016-08-30 15:33 ` David Craven
2016-08-29 21:45 ` Danny Milosavljevic [this message]
2016-08-29 22:04 ` Danny Milosavljevic
2016-08-22 13:20 ` [PATCH 07/11] gnu: Add python-schematics David Craven
2016-08-22 13:20 ` [PATCH 08/11] gnu: Add python-publicsuffix David Craven
2016-08-22 13:20 ` [PATCH 09/11] gnu: Add python-publicsuffix2 David Craven
2016-08-22 13:20 ` [PATCH 10/11] gnu: Add python-url David Craven
2016-08-22 13:20 ` [PATCH 11/11] gnu: Add python-ipaddress David Craven
2016-08-05 18:37 ` [PATCH 05/12] gnu: python: Add python-nltk David Craven
2016-08-05 18:37 ` [PATCH 06/12] gnu: python: Add python-pymongo David Craven
2016-08-08 20:36 ` Leo Famulari
2016-08-08 20:39 ` Leo Famulari
2016-08-05 18:37 ` [PATCH 07/12] gnu: python: Add python-sh David Craven
2016-08-05 18:37 ` [PATCH 08/12] gnu: python: Add python-schematics David Craven
2016-08-05 18:37 ` [PATCH 09/12] gnu: python: Add python-publicsuffix David Craven
2016-08-05 18:37 ` [PATCH 10/12] gnu: python: Add python-publicsuffix2 David Craven
2016-08-05 18:37 ` [PATCH 11/12] gnu: python: Add python-url David Craven
2016-08-05 18:37 ` [PATCH 12/12] gnu: python: Add python-ipaddress David Craven
2016-08-05 18:50 ` Leo Famulari
2016-08-06 12:52 ` David Craven
2016-08-06 15:57 ` Danny Milosavljevic
2016-08-07 0:20 ` Leo Famulari
2016-08-27 6:43 ` [PATCH 02/12] import: utils: Symbols from 'license->symbol' have a license: prefix Ricardo Wurmus
2016-08-27 8:31 ` David Craven
2016-08-30 19:07 ` Eric Bavier
2016-09-16 5:03 ` Eric Bavier
2016-09-16 7:29 ` David Craven
2016-09-16 15:40 ` Eric Bavier
2016-09-16 15:47 ` David Craven
2016-09-16 17:02 ` Eric Bavier
2016-09-19 13:06 ` Ludovic Courtès
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