From mboxrd@z Thu Jan 1 00:00:00 1970 From: York Sun Date: Tue, 20 May 2014 08:40:35 -0700 Subject: [U-Boot] [PATCH][v2] board/p1_p2_rdb:Enable p1_p2_rdb boot from NAND/SD/SPI in SPL In-Reply-To: <1400152393-23868-1-git-send-email-prabhakar@freescale.com> References: <1400152393-23868-1-git-send-email-prabhakar@freescale.com> Message-ID: <537B7773.4010800@freescale.com> List-Id: MIME-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit To: u-boot@lists.denx.de On 05/15/2014 04:13 AM, Prabhakar Kushwaha wrote: > In the earlier patches, the SPL/TPL fraamework was introduced. > For SD/SPI flash booting way, we introduce the SPL to enable a loader stub. The > SPL was loaded by the code from the internal on-chip ROM. The SPL initializes > the DDR according to the SPD and loads the final uboot image into DDR, then > jump to the DDR to begin execution. > > For NAND booting way, the nand SPL has size limitation on some board(e.g. > P1010RDB), it can not be more than 4KB, we can call it "minimal SPL", So the > dynamic DDR driver doesn't fit into this minimum SPL. We added the TPL that is > loaded by the the minimal SPL. The TPL initializes the DDR according to the SPD > and loads the final uboot image into DDR,then jump to the DDR to begin execution. > > This patch enabled SPL/TPL for P1_P2_RDB to support starting from NAND/SD/SPI > flash with SPL framework and initializing the DDR according to SPD in the SPL/TPL. > Because the minimal SPL load the TPL to L2 SRAM and the jump to the L2 SRAM to > execute, so the section .resetvec is no longer needed. > > Signed-off-by: Prabhakar Kushwaha > --- > Changes for v2: Incroporated York' comments Applied to u-boot-mpc85xx/master. York