May 2004 - U-Boot

[U-Boot-Users] mpc8xx RTC questions
by Sam Song 25 May '04

25 May '04

Hi, When setting "#define CONFIG_RTC_MPC8xx" ,how could I do in my hardware scheme to make it really work?I mean what kind of battery(Capacity and Type) and how to connect it with 8xx?Someone said HW must monitor the power status and before power failed SW could set 8xx into powerdown mode for keeping 8xx RTC still work with battery.Is this so? Best regards, Sam _________________________________________________________ Do You Yahoo!? 嫌邮箱太小？雅虎电邮自助扩容！ http://cn.rd.yahoo.com/mail_cn/tag/10m/*http://cn.mail.yahoo.com/event/10m.…

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[U-Boot-Users] ocotea board question
by yan weichuan 25 May '04

25 May '04

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[U-Boot-Users] question about installing U-boot
by Abdelmajid Bouajila 24 May '04

24 May '04

Hello, I have compiled U-boot successfuly. I want to port it to an ML300 Board keeping in mind that I must only put the configuration of the FPGA and the U-boot code in the compact Flash memory. (I must erase the contents of the compact flash given by xilinx) some ideas? Thanks Abdelmajid

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[U-Boot-Users] LH7A400 Sharp boards running UBoot
by Devraj Mukherjee 24 May '04

24 May '04

Hi All, Can anyone please point me to any resources for LH7A400 Sharp boards running U-Boot. Thanks Devraj -- --------------------------------------------------------------------- System Administration Team Eternity Technologies Pty. Ltd. P O Box 5949 Wagga Wagga 2650 NSW AUS Phone/Fax +61-2-69717131 http://eternitytechnologies.com/ ---------------------------------------------------------------------

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[U-Boot-Users] Newbie 8240 question
by workndude 23 May '04

23 May '04

I have a VERY simple 8240 board - SDRAM, flash and a 16550 UART in int 3 of the EPIC. Is there a minimal PPC 8240 or 603 configuration that I can start with? The Sandpoint has that irritating Winbond chip... kindest regards, --------------------------------- Do you Yahoo!? Yahoo! Domains - Claim yours for only $14.70/year

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[U-Boot-Users] (Newbie) MPS8272ADS image layout
by Ward C. Travis 23 May '04

23 May '04

Forgive me if I have overlooked something simple. I have compiled u-boot using 'config_MPC8272ADS' and, following Wolfgang's advice, modified as little as possible. I accepted all the defaults, providing no overrides on the make line. Looking at he .srec file, it appears that the image is to be loaded at 0xfff00000 . The configuration words are based there and _start is placed beyond them, at the image + 0x0100 . The ADS board I am working with has the standard 8MB flash SIMM, which when the board boots from flash is mapped beginning at 0xff800000. I am unclear on how the MPC8272 reset vectors the PC to 0xfff00100. Perhaps the simple question is, should the image be loaded into flash at some other address? My flash is clear - it is a rented board - and so there is no previous loader or configuration words in flash; hence I must boot from EEPROM and download the code (with Metrowerks, via parallel) while flash is remapped for EEPROM boot. I currently am experimenting with programming the image at various offsets from the beginning of flash. But once I reconfigure to boot from flash and power-cycle, of course, I see no sign of activity. Thanks for any advice, -wt

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[U-Boot-Users] dbau1550
by "romio kasyanov 22 May '04

22 May '04

Where or how can I get dbau1550 little endian support?

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[U-Boot-Users] Advice on approach for adding a new memory bank initialization
by Jon Loeliger 22 May '04

22 May '04

Hey U-Booters, I have a board that has two completely disjoint banks of RAM, on different buses, that will most likely never be mapped contiguously. I need U-Boot to initialize both banks, make one of them available as the normal system RAM for U-Boot and Linux, and then after initializing the second, leave it for some future Linux device driver to use. As the code stands now, the initialization sequence is fairly standard: init_sequence[] references init_func_ram() near the end, init_func_ram() then prints "DRAM:" and calls initdram() initdram() calls spd_sdram() where the actual DRAM initialization happens, returning its size. init_dram() then prints out the spd_dram's returned size. I want to extend this model to initialize the second bank of memory as well. Clearly, I can do this, but I would like advice on the correct approach and style in which to do so. Should I: A) Add a new init_func_ram_other() entry to the init_sequence[] array, clone the init_func_ram() into init_func_ram_other(), and duplicate the whole chain of events down to the init of the other bank of memory. This init_func_ram_other() entry would be #ifdef conditional on my particular boards. B) Add a second "paragraph" of code to init_func_ram(), one for each type of memory, sort of like this: static int init_func_ram (void) { puts("DRAM: "); if ((gd->ram_size = initdram(board_type)) > 0) { print_size(gd->ram_size, "\n"); return (0); } puts(failed); puts("SDRAM: "); if ((sdram_size = initsdram(board_type)) > 0) { print_size(sdram_size, "\n"); return (0); } puts(failed); } Naturally, we'd have to invert the return handling here to make sure that both paragraphs of code are executed in the "working correctly" case. C) Re-work the printing of "DRAM" and the size into initdram() so that that function can have two sections to it, one for each bank of memory and still correctly printout two lines like: DRAM: 512MB SDRAM: 64 MB This option might entail pushing the establishment of the gd->sdram_size into the initdram() function, which in turn would then return just a boolean to indicate overall success or failure for all of RAM initialization. So, if I missed a better approach, let me know. I am leaning toward plan B), with A) as followup. C) gives me some headache just due to the implications of fixing up the code on other boards, of course. Thanks, jdl

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[U-Boot-Users] flash memory programmer
by Frank Young 22 May '04

22 May '04

Hi, To write u-boot to the flash memory, what kind of flash programmer do you guys usually use? The flash I am using is Fujitsu MBM29DL640E. I asked around and the average price is around $900. That is too expensive for me. Do anyone know any programmer under $500? Thanks! Frank _________________________________________________________________ FREE pop-up blocking with the new MSN Toolbar get it now! http://toolbar.msn.click-url.com/go/onm00200415ave/direct/01/

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[U-Boot-Users] Smc91c111 - extra bytes in receive buffer
by Earle Clubb 21 May '04

21 May '04

I'm trying to get the smc91c111 driver running, but I'm having trouble when reading received packets from the data register. There always seem to be extra bytes between the byte count and the destination address of the received packet. For example, here is the beginning of a received arp request: 407f 0042 ffff ffff ffff 000a 407f 0042 ffff ffff ffff 000a 04d0 cd01 0806 0001 0800 0604 0001 000a 04d0 cd01 c0a8 0b01 As you can see, the status word, byte count, destination address, and the first two bytes of the source address appear to be duplicated. Usually the data separating the first byte count from the second dest address is six words, but it can vary. Therefore, I'm not able to just trash the extra words because I might trash part of the packet as well. Any ideas on why this might be happening? Another question: what do the bits in the status word for a receive mean? I've looked through the data sheet and appnote96 and can't find any definition of the bits. Thanks for your help. Earle Clubb Software Engineer Valcom, Inc. E-mail: eclubb(a)valcom.com Voice: (540) 563-2000 x253 Fax: (540) 362-9800

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