From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from sandesh.cdotd.ernet.in (sandesh.cdotd.ernet.in [196.1.105.47]) by ozlabs.org (Postfix) with ESMTP id E09FDDDE02 for ; Mon, 7 Apr 2008 16:42:19 +1000 (EST) Received: from sandesh.cdotd.ernet.in (localhost [127.0.0.1]) by localhost.cdotd.ernet.in (Postfix) with ESMTP id B2C36CFB3A for ; Mon, 7 Apr 2008 12:11:27 +0530 (IST) Received: from mail1.cdotd.ernet.in (mail1.cdotd.ernet.in [196.1.105.196])by sandesh.cdotd.ernet.in (Postfix) with ESMTP id 91510CFB2Bfor ; Mon, 7 Apr 2008 12:11:27 +0530 (IST) Received: from cdotd.ernet.in (localhost.localdomain [127.0.0.1])by mail1.cdotd.ernet.in (8.12.5/8.12.5) with ESMTP id m376nQ9Q007189for ; Mon, 7 Apr 2008 12:19:27 +0530 From: "Deepak Gaur" To: linuxppc-embedded@ozlabs.org Subject: MVL Linux on MPC8560 Booting goes into infinite loop in early_init memset_io ( ) Date: Mon, 7 Apr 2008 13:19:26 +0630 Message-Id: <20080407064547.M56295@cdotd.ernet.in> MIME-Version: 1.0 Content-Type: text/plain; charset=iso-8859-1 List-Id: Linux on Embedded PowerPC Developers Mail List List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Hi all, While booting MVL linux on MPC8560 based board the kernel goes into a infinite loop in setup.c. The uncompressed image is located at 0x00000000 and is booted from 0x00000000 arch/ppc/kernel/head_fsl_booke.S ------------------------------------ bl early_init arch/ppc/kernel/setup.c ---------------------------------------- unsigned long early_init(int r3, int r4, int r5) { unsigned long phys; unsigned long offset = reloc_offset(); /* Default */ phys = offset + KERNELBASE; /* First zero the BSS -- use memset, some arches don't have * caches on yet */ memset_io(PTRRELOC(&__bss_start), 0, _end - __bss_start); __bss_start is 0xc039b00 and __bss_stop = _end =c03c7d90 _end Please anyone give me some pointers to understand this i.e use of PTRRELOC and REASON BEHIND clearing area from __bss_start to _end - __bss_start even though lot of symbols and functions are defined here(as per System.map) System.map --------------------- c039b000 A __bss_start c039b000 A __chrp_begin c039b000 A __chrp_end c039b000 A __init_end c039b000 A __openfirmware_begin c039b000 A __openfirmware_end c039b000 A __pmac_begin c039b000 A __pmac_end c039b000 A __prep_begin c039b000 A __prep_end c039b000 B system_state c039b004 B late_time_init c039b008 b execute_command c039b00c b panic_later c039b010 b panic_param c039b014 B Version_132618 ..... ..... c03c4458 B ic_nameservers c03c4464 B unix_socket_table c03c4464 B unix_table_lock c03c4868 b auth_domain_table c03c4868 b authtab_lock c03c4868 b packet_sklist_lock c03c4868 b rpc_credcache_lock c03c4868 b rpc_queue_lock c03c4868 b rpc_sched_lock c03c4968 b ip_table c03c4d68 b pmap_lock c03c4d68 b pmap_stats c03c4d90 b cache_defer_hash c03c4d90 b cache_defer_lock c03c4d90 b cache_list_lock c03c4d90 b queue_lock c03c5d90 b write_buf c03c7d90 A __bss_stop c03c7d90 A _end Thanks, Deepak Gaur