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charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: "barebox" X-SA-Exim-Connect-IP: 2001:8b0:10b:1:d65d:64ff:fe57:4e05 X-SA-Exim-Mail-From: barebox-bounces+lore=pengutronix.de@lists.infradead.org X-Spam-Checker-Version: SpamAssassin 3.4.2 (2018-09-13) on metis.ext.pengutronix.de X-Spam-Level: X-Spam-Status: No, score=-3.2 required=4.0 tests=AWL,BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,HEADER_FROM_DIFFERENT_DOMAINS, MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_NONE autolearn=unavailable autolearn_force=no version=3.4.2 Subject: RE: Uart set up in PBL X-SA-Exim-Version: 4.2.1 (built Wed, 08 May 2019 21:11:16 +0000) X-SA-Exim-Scanned: Yes (on metis.ext.pengutronix.de) > > So you load pbl/bare init barebox into SRAM, run PBIT memory test on DRAM, > then extract/copy barebox proper to DRAM or how does it work? > [Barbier, Renaud] For now I have never used PBL on ARM (lwl-y => obj-y). Probably did not do right as I tweaked the barebox linker script to have a TEXT_BASE. Only reason I did not use PBL is that it did not boot first few time I tried and the other way worked right away. PBIT runs from SPI NOR flash which is not a problem as there is a DDR BIST unit on our ARM SOC. I did include the memtester from pyropus.ca too for a more comprehensive test and obviously it is very slow running from flash with D-cache off. An improvement would be to run from SRAM. >>From the barebox_arm-reset_vector, the uart is set to a fixed baud rate, the DDR memory initialized and if PBIT is enabled a quick or comprehensive test is ran. Otherwise use the BIST to initialise ECC if present and then barebox_arm_entry is called to relocate barebox in memory. _______________________________________________ barebox mailing list barebox@lists.infradead.org http://lists.infradead.org/mailman/listinfo/barebox