From mboxrd@z Thu Jan 1 00:00:00 1970 Return-path: Received: from metis.ext.pengutronix.de ([92.198.50.35]) by bombadil.infradead.org with esmtps (Exim 4.80.1 #2 (Red Hat Linux)) id 1XZIjc-0003lk-VK for barebox@lists.infradead.org; Wed, 01 Oct 2014 12:10:21 +0000 Date: Wed, 1 Oct 2014 14:06:43 +0200 From: Sascha Hauer Message-ID: <20141001120643.GH4992@pengutronix.de> References: <20141001193534.5A4B.AA925319@jp.panasonic.com> MIME-Version: 1.0 Content-Disposition: inline In-Reply-To: <20141001193534.5A4B.AA925319@jp.panasonic.com> List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: "barebox" Errors-To: barebox-bounces+u.kleine-koenig=pengutronix.de@lists.infradead.org Subject: Re: Newbie question To: Masahiro Yamada Cc: barebox@lists.infradead.org Hi, On Wed, Oct 01, 2014 at 07:35:34PM +0900, Masahiro Yamada wrote: > Hi. > > > Please forgive me if I am asking a silly newbie question. > > I have some knowledge of U-Boot > but I have just started digging into barebox. > > > My simple question is, something like SPL > (secondary program loader) in U-boot is covered by barebox? Yes, it is, in barebox it's called PBL (PreBootLoader). If enabled the ROM will load the PBL from the boot device (Or sometimes the whole image, depends on the ROM). The PBL will then load the rest of the image from the device, uncompress it and jump to it. > [1] BootROM (hard-wired) > > [2] Tiny boot program > for initializing SDRAM, etc. > > [3] High-level boot loader > for loading the kernel, handling device tree etc. > > [4] Linux > > > > I guess [3] is covered by barebox. > > Is [2] supported by barebox? Or is it like Do-It-Yourself thing? Well, there's infrastructure for it, but due to the limited space and restricted environment in the PBL there's still some DIY left ;) Sascha -- Pengutronix e.K. | | Industrial Linux Solutions | http://www.pengutronix.de/ | Peiner Str. 6-8, 31137 Hildesheim, Germany | Phone: +49-5121-206917-0 | Amtsgericht Hildesheim, HRA 2686 | Fax: +49-5121-206917-5555 | _______________________________________________ barebox mailing list barebox@lists.infradead.org http://lists.infradead.org/mailman/listinfo/barebox