March 2004 - U-Boot

[U-Boot-Users] Memory Caching in Interrupt mode
by Sharad Gupta 10 Mar '04

10 Mar '04

Hi All, I am using UBoot as a firmware and boot loader for a custom development board based on MPC7455. I understand UBoot is not intended for use in interrupt modes, but I thought it does no harm in outputting some text on serial console everytime an interrupt comes in, say a timer interrupt (every 1 sec). I am using BDI2000 to start debugging at 0x900. But my problem is that since address translation is turned off while processing interrupts, I am not able to write to the serial port address since processor caches it and does not really push it out to the serial port. I am using ns16550 driver and the serial port is at 0x60000000. Whats the work around for this problem ? 1. Shall I turn the address translation on, but I am not sure if its safe to do that, and even if I do that where exactly should I do that, in timer_interrupt routine or transfer_to_handler routine ? 2. Or shall i disable the data caches while processing interrupts ? Thanks Sharad.

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Re:[U-Boot-Users] Problem booting MontaVista 3.0 Linux on IBM
by Sam Song 10 Mar '04

10 Mar '04

Andy Vo wrote: > I am using U-boot with Linux version 2.4.18 but > booting hung at "Uncompressing Kernel > image...OK". Could you mask the following code in YOUR_BOARD.h? /* #define CONFIG_CLOCKS_IN_MHZ 1 ** clocks passsed to Linux in MHz */ For 2.4.x kernel,LINUX use Hz as the system frequency unit instead of MHz. Hope this help. Sam _________________________________________________________ Do You Yahoo!? 完全免费的雅虎电邮，马上注册获赠额外60兆网络存储空间 http://cn.rd.yahoo.com/mail_cn/tag/?http://cn.mail.yahoo.com

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[U-Boot-Users] Any hints on supporting USB keyboard on 823e board?
by Sam Song 10 Mar '04

10 Mar '04

Hi, I want to add USB keyboard support on LITE_DW 823e board in U-Boot.USB keyboard could work fine on it in LINUX with m8xxhci.c.I knew there were some boards with USB support for 405 but not 8xx.Any hints? Best regards, Sam _________________________________________________________ Do You Yahoo!? 完全免费的雅虎电邮，马上注册获赠额外60兆网络存储空间 http://cn.rd.yahoo.com/mail_cn/tag/?http://cn.mail.yahoo.com

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[U-Boot-Users] U-boot for Malta boards
by Babbellapati Syam Krishna (IFIN DC COM) 10 Mar '04

10 Mar '04

Hi, I am new to this community. I am interested in knowing if a U-boot port exists for MIPS Malta 4K board. I did a quick check on the net and on this mailing list archive but couldn't get this information. If it exists, then please guide me with the relevant information. Thank you in advance, Syam

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[U-Boot-Users] Problem booting MontaVista 3.0 Linux on IBM 405EP Bubinga board
by Andy Vo 09 Mar '04

09 Mar '04

Hello all, I am using U-boot with Linux version 2.4.18 but booting hung at = "Uncompressing Kernel Image...OK".=20 I modified the bd_info structure in the kernel (file = include/asm-ppc/ppcboot.h) to match the bd_info structure of U-boot = (file include/asm/uboot.h) as suggested in the U-boot manual. The contents of the 2 board info structures = were almost identical except for the extra entry of "mon_fnc_t = *bi_mon_fnc;" at the end of the ppcboot.h file of the kernel. I did not = know if this entry was needed or not so I left it in there. I then = booted the recompiled kernel but it still died at the same place. Below is the kernel's bd_info structure from file = include/asm-ppc/ppcboot.h that I used for the 405EP Bubinga board: typedef struct bd_info { unsigned long bi_memstart; /* start of DRAM memory */ unsigned long bi_memsize; /* size of DRAM memory in bytes */ unsigned long bi_flashstart; /* start of FLASH memory */ unsigned long bi_flashsize; /* size of FLASH memory */ unsigned long bi_flashoffset; /* reserved area for startup monitor */ unsigned long bi_sramstart; /* start of SRAM memory */ unsigned long bi_sramsize; /* size of SRAM memory */ #if defined(CONFIG_8xx) || defined(CONFIG_8260) unsigned long bi_immr_base; /* base of IMMR register */ #endif unsigned long bi_bootflags; /* boot / reboot flag (for LynxOS) */ unsigned long bi_ip_addr; /* IP Address */ unsigned char bi_enetaddr[6]; /* Ethernet adress */ unsigned short bi_ethspeed; /* Ethernet speed in Mbps */ unsigned long bi_intfreq; /* Internal Freq, in MHz */ unsigned long bi_busfreq; /* Bus Freq, in MHz */ #if defined(CONFIG_8260) unsigned long bi_cpmfreq; /* CPM_CLK Freq, in MHz */ unsigned long bi_brgfreq; /* BRG_CLK Freq, in MHz */ unsigned long bi_sccfreq; /* SCC_CLK Freq, in MHz */ unsigned long bi_vco; /* VCO Out from PLL, in MHz */ #endif unsigned long bi_baudrate; /* Console Baudrate */ #if defined(CONFIG_405GP) || defined(CONFIG_405EP) unsigned char bi_s_version[4]; /* Version of this structure */ unsigned char bi_r_version[32]; /* Version of the ROM (IBM) */ unsigned int bi_procfreq; /* CPU (Internal) Freq, in Hz */ unsigned int bi_plb_busfreq; /* PLB Bus speed, in Hz */ unsigned int bi_pci_busfreq; /* PCI Bus speed, in Hz */ unsigned char bi_pci_enetaddr[6]; /* PCI Ethernet MAC address */ #endif #if defined(CONFIG_HYMOD) hymod_conf_t bi_hymod_conf; /* hymod configuration information */ #endif #if defined(CONFIG_EVB64260) /* the board has three onboard ethernet ports */ unsigned char bi_enet1addr[6]; unsigned char bi_enet2addr[6]; #endif #if defined(CONFIG_405GP) || defined(CONFIG_405EP)=20 unsigned int bi_opbfreq; /* OPB clock in Hz */=20 int bi_iic_fast[2]; /* Use fast i2c mode */=20 #endif mon_fnc_t *bi_mon_fnc; /* Pointer to monitor functions */ } bd_t; I am fairly new to embedded Linux so any detailed help would be greatly = appreciated. Sorry for the long email. Andy

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[U-Boot-Users] Testing
by Andy Vo 09 Mar '04

09 Mar '04

Hello, Please ignore this message if it went thru. Last night, I tried to send an email to this address 'u-boot-users(a)lists.sourceforge.net' but it did not go thru. So I wanted to try a test message now. Andy

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[U-Boot-Users] u-boot on a quad processor board
by Frank 09 Mar '04

09 Mar '04

I have u-boot running concurrently on all 4 processors on our multi-processor board. Anyone interested in this. If so I will clean up my code and submit a patch. Also, my next task is to keep u-boot in flash (with a limited number of commands) if the sdram fails. This is will allow the user to peek and poke from the command line to configure the sdram controller or debug sdram so it (u-boot) can complete the booting process to sdram. This the only short coming I can see that u-boot has.:-) __________________________________ Do you Yahoo!? Yahoo! Search - Find what you�re looking for faster http://search.yahoo.com

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Re: [U-Boot-Users] Linker ERROR
by Brad Parker 09 Mar '04

09 Mar '04

"Wolfgang Kanovsky" wrote: >Hi All, > >im working on an embedded ( with AMD SC520 / i386 ) board every thing comp. >nice >but i got the following Linker Error for u-Boot. > >Anyone Knows this Error and its cause? I have a bunch of sc520 fixes from a board port I did. This one is cause by a bad linker directive file (u-boot.lds). I believe I fixed the other sc520's also. I need to check and submit a patch. My board has a 512k 8-bit flash - you will have to adjust the flash address in the linker file and in the 16 bit .S if your flash is larger. -brad /* * (C) Copyright 2002 * Daniel Engström, Omicron Ceti AB, daniel(a)omicron.se. * * See file CREDITS for list of people who contributed to this * project. * * This program is free software; you can redistribute it and/or * modify it under the terms of the GNU General Public License as * published by the Free Software Foundation; either version 2 of * the License, or (at your option) any later version. * * This program is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the * GNU General Public License for more details. * * You should have received a copy of the GNU General Public License * along with this program; if not, write to the Free Software * Foundation, Inc., 59 Temple Place, Suite 330, Boston, * MA 02111-1307 USA */ OUTPUT_FORMAT("elf32-i386", "elf32-i386", "elf32-i386") OUTPUT_ARCH(i386) ENTRY(_start) SECTIONS { . = 0x38fc0000; /* Where bootcode in the flash is mapped */ .text : { *(.text); } __u_boot_cmd_start = .; .u_boot_cmd : { *(.u_boot_cmd) } __u_boot_cmd_end = .; . = ALIGN(4); .rodata : { *(.rodata) *(.rodata.*) } . = 0x400000; /* Ram data segment to use */ _i386boot_romdata_dest = ABSOLUTE(.); .data : AT ( LOADADDR(.rodata) + SIZEOF(.rodata) ) { *(.data) } _i386boot_romdata_start = LOADADDR(.data); . = ALIGN(4); .got : AT ( LOADADDR(.data) + SIZEOF(.data) ) { *(.got) } _i386boot_romdata_size = SIZEOF(.data) + SIZEOF(.got); . = ALIGN(4); _i386boot_bss_start = ABSOLUTE(.); .bss : { *(.bss) } _i386boot_bss_size = SIZEOF(.bss); /* 16bit realmode trampoline code */ .realmode 0x7c0 : AT ( LOADADDR(.got) + SIZEOF(.got) ) { *(.realmode) } _i386boot_realmode = LOADADDR(.realmode); _i386boot_realmode_size = SIZEOF(.realmode); /* 16bit BIOS emulation code (just enough to boot Linux) */ .bios 0 : AT ( LOADADDR(.realmode) + SIZEOF(.realmode) ) { *(.bios) } _i386boot_bios = LOADADDR(.bios); _i386boot_bios_size = SIZEOF(.bios); /* The load addresses below assumes that the flash * will be mapped so that 0x38ff0000 == 0xffff0000 * at reset time * * The fe00 and ff00 offsets of the start32 and start16 * segments are arbitrary, the just have to be mapped * at reset and the code have to fit. * The fff0 offset of reset is important, however. */ . = 0xfffffe00; .start32 : AT (0x38fffe00) { *(.start32); } . = 0xff00; .start16 : AT (0x38ffff00) { *(.start16); } . = 0xfff0; .reset : AT (0x38fffff0) { *(.reset); } _i386boot_end = (LOADADDR(.reset) + SIZEOF(.reset) ); }

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[U-Boot-Users] Linker ERROR
by Wolfgang Kanovsky 09 Mar '04

09 Mar '04

Hi All, im working on an embedded ( with AMD SC520 / i386 ) board every thing comp. nice but i got the following Linker Error for u-Boot. Anyone Knows this Error and its cause? UNDEF_SYM=`i386-linux-objdump -x lib_generic/libgeneric.a board/sc520_hopf/libsc520_hopf.a cpu/i386/libi386.a lib_i386/libi386.a fs/cramfs/libcramfs.a fs/fat/libfat.a fs/fdos/libfdos.a fs/jffs2/libjffs2.a net/libnet.a disk/libdisk.a rtc/librtc.a dtt/libdtt.a drivers/libdrivers.a drivers/sk98lin/libsk98lin.a post/libpost.a post/cpu/libcpu.a common/libcommon.a |sed -n -e 's/.*$__u_boot_cmd_.*$/-u\1/p'|sort|uniq`;\ i386-linux-ld -Bstatic -T /Users/rac/dev/hopf/nts/build/u-boot_new/board/sc520_hopf/u-boot.lds -Ttext 0x087c0000 $UNDEF_SYM cpu/i386/start.o cpu/i386/start16.o cpu/i386/reset.o \ --start-group lib_generic/libgeneric.a board/sc520_hopf/libsc520_hopf.a cpu/i386/libi386.a lib_i386/libi386.a fs/cramfs/libcramfs.a fs/fat/libfat.a fs/fdos/libfdos.a fs/jffs2/libjffs2.a net/libnet.a disk/libdisk.a rtc/librtc.a dtt/libdtt.a drivers/libdrivers.a drivers/sk98lin/libsk98lin.a post/libpost.a post/cpu/libcpu.a common/libcommon.a -L /data/nts/toolchain/lib/gcc-lib/i386-linux/3.3.1 -lgcc --end-group \ -Map u-boot.map -o u-boot i386-linux-ld: section .data [087d5754 -> 087d62c7] overlaps section .rodata.str1.1 [087d5754 -> 087d71a6] i386-linux-ld: section .realmode [087d62c8 -> 087d642d] overlaps section .rodata.str1.1 [087d5754 -> 087d71a6] i386-linux-ld: section .bios [087d642e -> 087d696b] overlaps section .rodata.str1.1 [087d5754 -> 087d71a6] make: *** [u-boot] Error 1 2 Question: in uboot.lds (sc520_cdp board) is the following statement . = 0x400000; /* Ram data segment to use */ _i386boot_romdata_dest = ABSOLUTE(.); .data : AT ( LOADADDR(.rodata) + SIZEOF(.rodata) ) { *(.data) } _i386boot_romdata_start = LOADADDR(.data); can anyone tell me what this statement does ? and which adress = 0x400000 this is ? thanks Wolfgang Kanovsky _______________________________________________________________________ Realtime Distributed Computing Systems - Ruprecht & Partner OEG Hopf Industriefunkuhren SUN Microsystems iForce Partner Master Reseller A*CZ*SK*HR*SLO Oracle Partner Embelgasse 66/10-11 A - 1050 Wien Tel: +43 1 5455077-0 Fax: +43 1 5455077-11 mailto:office@rdcs.at Internet: http://www.rdcs.at/ _____________________________________________________________________

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[U-Boot-Users] u-boot porting howto
by Hager, Johannes, HRD/AB 08 Mar '04

08 Mar '04

Hi all, does anyone out there have a manual or howto, which describes the porting of u-boot ? Best regards and Thanks in advance, Johannes

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