hi thanks for your reply. the problem is still there. At 800MHZ core its working fine but for 1Ghz its still happening. Any suggestion or check point I can monitor. From: sanjeev sharma Sent: ‎02‎ ‎May‎ ‎2014 ‎09‎:‎22 To: Ashish CC: Valdis Kletnieks; scottwood@freescale.com; linuxppc-dev@lists.ozlabs.org; kernelnewbies Subject: Re: MPC8641 based custom board Kernel stuck at 1000Mhz core clock Hello Ashish, is this issue resolved and is this always happening when you are changing core to 1Ghz because i am confused here with sometime Keyword. Regards Sanjeev Sharma On Fri, Apr 4, 2014 at 1:12 PM, Ashish <curieux.khetan@gmail.com> wrote: On Thursday 03 April 2014 08:55 AM, sanjeev sharma wrote: Are you able to capture kernel logs ? Regards Sanjeev Sharma On Thu, Mar 27, 2014 at 10:01 PM, <Valdis.Kletnieks@vt.edu> wrote: On Thu, 27 Mar 2014 16:04:37 +0530, Ashish said:

Hi,

I am using MPC8641-HPCN based custom board and able to boot linux at MPX clock 400Mhz and core clock 800mhz. When I am increasing core frequency ie MPX clock at 400Mhz and core at 1Ghz, kernel stuck.

Step 0: Prove to us that your core actually runs reliable and stably at 1Ghz. Step 1: Figure out *where* it gets stuck. If you have earlyprintk working on your board, adding 'initcall_debug ignore_loglevel' to the kernel cmdline often helps track down where a kernel hangs during boot. _______________________________________________ Kernelnewbies mailing list Kernelnewbies@kernelnewbies.org http://lists.kernelnewbies.org/mailman/listinfo/kernelnewbies Hi, Does kernel logs means debugging information that kernel prints while booting using printk or it is something else? Here is kernel boot logs that kernel printed while booting... U-Boot 2013.04 (Jan 27 2014 - 11:21:21) Unicore software on multiprocessor system!! To enable mutlticore build define CONFIG_MP CPU: 8641, Version: 2.1, (0x80900021) Core: E600 Core 0, Version: 2.2, (0x80040202) Clock Configuration: CPU:1000 MHz, MPX:400 MHz DDR:200 MHz (400 MT/s data rate), LBC:25 MHz L1: D-cache 32 KB enabled I-cache 32 KB enabled L2: 512 KB enabled Board: MPC8641-HPCN I2C: ready DRAM: 512 MiB SDRAM test phase 1: SDRAM test phase 2: SDRAM test passed. Flash: 16 MiB EEPROM: NXID v1 In: serial Out: serial Err: serial Net: eTSEC1, eTSEC2, eTSEC3, eTSEC4 [PRIME] Hit any key to stop autoboot: Speed: 1000, full duplex Using eTSEC4 device TFTP from server 192.168.10.1; our IP address is 192.168.10.2 Filename 'uRamdisk'. Load address: 0x600000 Loading: * ################################################################# ################################################################# ################################################################# ################################################################# ################################################################# ################################################################# ################################################################# ################################################################# ################################################################# ################################################################# ################################################################# ################################################################# ################################################################# ################################################################# ################################################################# ################################################################# ################################################################# ################################################################# ################################################################# ################################################################# ################################################################# ################################################################# ################################################################# ################################################## 13.1 MiB/s done Bytes transferred = 22680188 (15a127c hex) Speed: 1000, full duplex Using eTSEC4 device TFTP from server 192.168.10.1; our IP address is 192.168.10.2 Filename 'uImage'. Load address: 0x16000000 Loading: * ################################################################# ################################################################# ####################################### 14 MiB/s done Bytes transferred = 2476304 (25c910 hex) Speed: 1000, full duplex Using eTSEC4 device TFTP from server 192.168.10.1; our IP address is 192.168.10.2 Filename 'mpc8641_hpcn.dtb'. Load address: 0x14000000 Loading: * # 2.6 MiB/s done Bytes transferred = 5540 (15a4 hex) ## Booting kernel from Legacy Image at 16000000 ... Image Name: Linux-3.13.6 Image Type: PowerPC Linux Kernel Image (gzip compressed) Data Size: 2476240 Bytes = 2.4 MiB Load Address: 00000000 Entry Point: 00000000 Verifying Checksum ... OK ## Loading init Ramdisk from Legacy Image at 00600000 ... Image Name: rootfs Image Type: PowerPC Linux RAMDisk Image (gzip compressed) Data Size: 22680124 Bytes = 21.6 MiB Load Address: 00000000 Entry Point: 00000000 Verifying Checksum ... OK ## Flattened Device Tree blob at 14000000 Booting using the fdt blob at 0x14000000 Uncompressing Kernel Image ... OK Loading Ramdisk to 1e923000, end 1fec423c ... OK Loading Device Tree to 007fb000, end 007ff5a3 ... OK (some times it stucking here) Using MPC86xx HPCN machine description Total memory = 512MB; using 1024kB for hash table (at cff00000) Linux version 3.13.6 (ashish@ashish-VirtualBox) (gcc version 4.7.2 (GCC) ) #8 Sat Mar 29 10:31:58 IST 2014 Found initrd at 0xde923000:0xdfec423c bootconsole [udbg0] enabled setup_arch: bootmem mpc86xx_hpcn_setup_arch() MPC86xx HPCN board from Freescale Semiconductor arch: exit Zone ranges: DMA [mem 0x00000000-0x1fffffff] Normal empty HighMem empty Movable zone start for each node Early memory node ranges node 0: [mem 0x00000000-0x1fffffff] (some times here)