From mboxrd@z Thu Jan 1 00:00:00 1970 From: Muneet Date: Thu, 13 Dec 2007 06:24:13 -0800 (PST) Subject: [U-Boot-Users] MPC boot sequence. Message-ID: <14316774.post@talk.nabble.com> List-Id: MIME-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit To: u-boot@lists.denx.de Hello Friends, I am facing some problem in understanding the booting sequence of MPC8323E. The MPC refernce manual says:- -- At PORESET, the processor loads RCW from Local Bus EEPROM or I2C EEPROM. After decoding the RCWH, it jumps to the boot code location found in it.-- The MPC8323E-RDB memory map is as follows:- 0x0000_0000 - 0x01FF_FFFF -- DDR 2GB -- PCI -- PCI 0xE000_0000 - 0xE01F_FFFF -- IMMR 0xFE00_0000 - 0xFEFF_FFFF -- Local Bus EEPROM(Flash 16 MB) RCWH - A060_0000 RCWL - 4205_0083 My understanding is as follows:-- 1. At PORESET, the processor loads RCW from Local Bus Flash. The address at that time is 0x0000_0000. 2. After reading the BMS and ROMLOC of RCWH, it locates to the address 0x0000_0100 and here it finds "uboot", the execution proceeds and the LBLAWBAR0 is programmed with 0xFE00_0000. thus Flash relocation occurs and then the kernel is uncompressed to DDR if allowed to boot. If this is Ok, or there is some flaw in it..? Thanks.. -- View this message in context: http://www.nabble.com/MPC-boot-sequence.-tp14316774p14316774.html Sent from the Uboot - Users mailing list archive at Nabble.com.