From mboxrd@z Thu Jan 1 00:00:00 1970 From: erik quanstrom Date: Tue, 2 Dec 2014 06:10:46 -0800 To: 9fans@9fans.net Message-ID: In-Reply-To: References: MIME-Version: 1.0 Content-Type: text/plain; charset="US-ASCII" Content-Transfer-Encoding: 7bit Subject: Re: [9fans] Porting plan9 Topicbox-Message-UUID: 31fddfc8-ead9-11e9-9d60-3106f5b1d025 > One of the functions u-boot performs is configuring the various subsystems > in the SoC (individual clocks and power settings for subcomponents, gpio > pin functions, ...) -- things a BIOS would do in a more old-timey computer. > In my experience these are typically undocumented (or worse, incorrectly > documented), so doing this initialisation in Plan 9 would require reverse > engineering of u-boot to figure out what to do. It's easier just to be > lazy and let u-boot do it. that's interesting. with the marvell chip and board i had, there was almost no setup code required. and what setup code there was, the hardware guy had got wrong. - erik