[U-Boot-Users] EP852 : Kernel not booting ( Hangs after uncompressing)
Hi, I'm trying to port u-boot-1.1.3 to EP852 board with mpc852T processor.The kernel im using is linuxppc 2.4.21. The board is working fine with u-boot , the problem is that kernel is not starting. I've made sure that the bd_info structure is same in kernel and u-boot. The clocks_in_mhz variable is not set and the IMMR value in kernel and u-boot matches. I run the test_burst program in u-boot and it worked fine.( so no prob with RAM) What else am i doing wrong??
The dump is :
U-Boot 1.1.3 (Oct 28 2005 - 12:54:07) EP852
CPU: MPC852TxxZPnn at 50 MHz [25.0...125.0 MHz] 4 kB I-Cache 4 kB D-Cache FEC present
Board: EP852 (Rev. e4). CPLD Rev: 00 DIP Switch: 1111 DRAM: 16 MB Top of RAM usable for U-Boot at: 01000000 Reserving 354k for U-Boot at: 00fa7000 Reserving 128k for malloc() at: 00f87000 Reserving 60 Bytes for Board Info at: 00f86fc4 Reserving 56 Bytes for Global Data at: 00f86f8c Stack Pointer at: 00f86f68 New Stack Pointer is: 00f86f68 Now running in RAM - U-Boot at: 00fa7000 FLASH: Flash addr:ff800000 AMD_ID_LV320B selected. before print_size 8 MB In: serial Out: serial Err: serial U-Boot relocated to 00fa7000 Net: FEC ETHERNET ### main_loop entered: bootdelay=8 ### main_loop: bootcmd="<UNDEFINED>" => printenv bootargs bootargs=console=ttyS0,9600 root=/dev/ram => tftp 0x00200000 pImage Using FEC ETHERNET device TFTP from server 10.129.87.5; our IP address is 10.129.87.250 Filename 'pImage'. Load address: 0x200000 Loading: ################################################################# ########################################################### done Bytes transferred = 631143 (9a167 hex) => bootm 0x00200000 ## Booting image at 00200000 ... Image Name: Linux-2.4.21 Created: 2005-10-27 13:15:01 UTC Image Type: PowerPC Linux Kernel Image (gzip compressed) Data Size: 631079 Bytes = 616.3 kB Load Address: 00100000 Entry Point: 00100000 Verifying Checksum ... OK Uncompressing Kernel Image ... OK before do_bootm_linux() argv = 16722772 addr = 16282928 ## Current stack ends at 0x00F86CA8 => set upper limit to 0x00800000 ## cmdline at 0x007FFF00 ... 0x007FFF20 No initrd ## Transferring control to Linux (at address 00100000) ... bi_memstart = 0 bi_memsize = 16777216 bi_flashstart = 4286578688 bi_flashsize = 8388608 bi_flashoffset = 343040 bi_sramstart = 0 bi_sramsize = 0 bi_immr_base = 4196401152 bi_bootflags = 1 bi_ip_addr = 176248826 bi_enetaddr[6] = bi_ethspeed = 114 bi_intfreq = 50000000 bi_busfreq = 50000000 bi_baudrate = 38400 // see the problem below
The image was created with the following in arc/ppc/boot/Makefile : $(MKIMAGE) -A ppc -O linux -T kernel -C gzip -a 0x00100000 -e 0x00100000 \ -n 'Linux-$(VERSION).$(PATCHLEVEL).$(SUBLEVEL)$(EXTRAVERSION)' \ -d $< images/vmlinux.PPCBoot ln -sf vmlinux.PPCBoot images/pImage
The same kernel was working fine before with the epbootloader. the partitions i made in kernel MTD are: ff80_0000 ------- ff82_0000 -> boot ff82_0000 ------- ff8c_0000 -> zImage ff8c_0000 ------- ff2c_0000 -> ramdisk ff2c_0000 ------- ffff_ffff -> UserFS (JFFS2)
Some of the #defines in EP852 configs are :
#define CFG_SDRAM_SIZE (16 * MB) #define CFG_FLASH_BASE 0xFF800000 #define CFG_FLASH_SIZE (8 * MB) #define CFG_BSCR_BASE 0xFA400000 #define CFG_IMMR 0xFA200000 #define CFG_JFFS2_FIRST_SECTOR 56 what should i give here? #define CFG_PRELIM_OR_AM 0xFF800000 #define CFG_OR0_PRELIM (CFG_PRELIM_OR_AM | CFG_OR_TIMING_FLASH) #define CFG_BR0_PRELIM 0xFF800001 #define CFG_OR1_PRELIM 0xFF000600 #define CFG_BR1_PRELIM ((CFG_SDRAM_BASE & BR_BA_MSK) | BR_MS_UPMA | BR_V ) #define CFG_BR3_PRELIM 0xFA400001 /* BCSR */ #define CFG_OR3_PRELIM 0xFF7F8970 #define CFG_BR4_PRELIM 0xFA000401 /* NVRAM&SRAM */ #define CFG_OR4_PRELIM 0xFFF80970
There is other minor(??) problem. When i set the value of CFG_SCCR to SCCR_COM00 | SCCR_DFSYNC00 | SCCR_DFBRG00 | SCCR_DFNL000 | SCCR_DFNH000 | SCCR_DFLCD000 | SCCR_DFALCD00 u-boot works at CONFIG_BAUDRATE / 4 speed i.e if CONFIG_BAUDRATE = 9600 i've to set minicom/kermit to 2400 . Now when i set CFG_SCCR to 0x03020800 ( the value given by embedded planet config file) the baud rate works fine but the FEC doesnt work properly. It works __VERY__ slowly, i get errors in fec_recv() ( enabling ET_DEBUG) How do I make both ( FEC and baudrate ) work fine and also is this related to kernel not booting?
Thanks in advance.
----------- We would change the world..... But GOD wont give the source code.
In message 4361EDBA.5010105@eisodus.com you wrote:
The board is working fine with u-boot , the problem is that kernel is not starting.
Then this is most probably a LInux kernel problem and as such somewhat off topic here.
...
bi_baudrate = 38400 // see the problem below
...
There is other minor(??) problem. When i set the value of CFG_SCCR to
It is a very fundamental rule not to ignore such "other minor problems". Always solve problems step by step. Do not continue as long as there eis some problem where you do not EXACTLY understand wher eit's coming from.
SCCR_COM00 | SCCR_DFSYNC00 | SCCR_DFBRG00 | SCCR_DFNL000 | SCCR_DFNH000 | SCCR_DFLCD000 | SCCR_DFALCD00 u-boot works at CONFIG_BAUDRATE / 4 speed i.e if CONFIG_BAUDRATE = 9600 i've to
Ummm... do you really understand what you are doing here? And what your hardware expects?
How do I make both ( FEC and baudrate ) work fine and also is this
Configure the board as needed by t your hardware (and please don't ask how to do it because we don't know your hardware).
related to kernel not booting?
Yes, most probably.
Best regards,
Wolfgang Denk
Wolfgang Denk wrote:
In message 4361EDBA.5010105@eisodus.com you wrote:
The board is working fine with u-boot , the problem is that kernel is not starting.
Then this is most probably a LInux kernel problem and as such somewhat off topic here.
The same kernel worked fine with embedded planet bootloader.We moved to U-Boot-1.1.3 made changes( bd_info struct, IMAP_ADDR etc) to kernel and now its not working. Note : bd_info and IMMR are _exactly_ the same in both (kernel and u-boot)
There is other minor(??) problem. When i set the value of CFG_SCCR to
It is a very fundamental rule not to ignore such "other minor problems". Always solve problems step by step. Do not continue as long as there eis some problem where you do not EXACTLY understand wher eit's coming from.
Thanks, we will look into it asap. But i see no reason why its realted to kernel not booting.
In message 43621080.9050106@eisodus.com you wrote:
The same kernel worked fine with embedded planet bootloader.We moved to
...which most probably means that the kernel is misconfigured for use with U-Boot.
Best regards,
Wolfgang Denk
Hi
we are trying to port U-boot for EP852T .
Can you provide me the U-boot source code ? or any patch?
Regards Gokul -- View this message in context: http://www.nabble.com/EP852-%3A-Kernel-not-booting-%28-Hangs-after-uncompres... Sent from the Uboot - Users forum at Nabble.com.
In message 2487235.post@talk.nabble.com you wrote:
we are trying to port U-boot for EP852T .
Your Subject: is seriously misleading. Please don;t do this!
Can you provide me the U-boot source code ? or any patch?
Just download it from the GIT or CVS repository.
If you want I can send you a copy on CDROM, but please note that you will have to pay for both my effort and the shipping.
------=_Part_462_9991373.1137750493468 Content-Type: text/html; charset=us-ascii Content-Transfer-Encoding: 7bit
And *never* post HTML on this list!
Best regards,
Wolfgang Denk
Hello Gokul,
gokulnagarajan (sent by Nabble.com) wrote:
we are trying to port U-boot for EP852T .
Can you provide me the U-boot source code ? or any patch?
The current version of U-boot does not have EP852T support. If you search the archive, you should be able to find a patch I sent sometime ago. Unfortunately, it is a patch against U-boot 1.1.2 and it hasn't been cleaned up.
I might do something to finally clean it up submit it in a proper way this weekend, but so far that's it.
Thanks, Vladimir
participants (4)
-
gautam borad -
gokulnagarajan (sent by Nabble.com) -
Vladimir Gurevich -
Wolfgang Denk