January 2004 - U-Boot

[U-Boot-Users] lds question
by Ed Okerson 02 Jan '04

02 Jan '04

The file u-boot.lds for the dbau1x00 boards contains the following line at the top: OUTPUT_FORMAT("elf32-tradbigmips", "elf32-tradbigmips", "elf32-tradbigmips") but to get the board to compile for little endian the line needs to be changed to: OUTPUT_FORMAT("elf32-tradlittlemips", "elf32-tradlittlemips", "elf32-tradlittlemips") but #ifdef doesn't seem to work in this file. What I came up with was acutally a hack in the top level config.mk file to use a different file I called u-boot-l.lds. Is there a better way? Ed Okerson

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[U-Boot-Users] memsetup.S patch for AU1X00
by Ed Okerson 02 Jan '04

02 Jan '04

Attached is a patch for the memsetup.S for the au1x00 family of processors. The previous version had only been tested on the AU1000 in big endian mode, this has been tested on the AU1000 and AU1500 in both big and little endian modes. Ed Okerson

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[U-Boot-Users] Little endian ethernet for AU1x00
by Ed Okerson 02 Jan '04

02 Jan '04

The attached patch fixes ethernet for the AU1X00 family of processors when running in little-endian mode. Ed Okerson

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[U-Boot-Users] Endian patch for AU1x00
by Ed Okerson 02 Jan '04

02 Jan '04

Attached is an patch to cmd_ide.c that fixes endian issues for the AU1x00 family of processors. Previously these processors could only read Compact Flash cards (and perhaps other IDE devices) if the drive was byte swapped from what is written by a standard PC. With this patch they can now read them without the bytes needing to be swapped. Ed Okerson

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[U-Boot-Users] Bootup sequence?
by J P 01 Jan '04

01 Jan '04

Hi, What are the steps to be followed in bootup process of PowerPC to load the linux OS? ie the minimal hardware configuration that has to be done. ________________________________________________________________________ Yahoo! India Mobile: Download the latest polyphonic ringtones. Go to http://in.mobile.yahoo.com

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[U-Boot-Users] U-Boot Not Loading Successfully
by Jeff Stevens 01 Jan '04

01 Jan '04

I am porting U-Boot over to a new product and am having some difficulty getting U-Boot to load successfully. I have placed our board on a logic analyzer and found (based on System.map) that U-Boot seems to crash in cpu/mpc8xx/cpu_init.c in function cpu_init_f at lines: memctl->memc_br0 = CFG_BR0_PRELIM; memctl->memc_or0 = CFG_OR0_PRELIM; Here is my board configuration: CPU: MPC855T FLASH: AMD AM29LV040B (512kB 8-bit on CS0) SDRAM: Micron MT48LC4M32 (16MB 32-bit on CS2) NVRAM: Simtek STK14C88 (32kB 8-bit on CS4) The board is set to have the IMMR come up at 0xFF000000 (on hard reset), and that is what I have CFG_IMMR set to in my board configuration file. Could this be a problem with the placement of the IMMR. I previously had the IMMR at 0x00000000 on hard reset and then moved it to 0xFA200000 with CFG_IMMR, which had the same effect. Or, could this be an issue with my BR0 and OR0 settings? I read something in that file before those two lines above, which talked about CFG_OR0_REMAP, but didn't quite understand it. Should I be using this? Here are my BRx, ORx settings: #define FLASH_BASE_PRELIM 0xFFF80000 #define CFG_PRELIM_OR_AM 0xFFFF0000 #define CFG_OR_TIMING_FLASH (OR_CSNT_SAM | OR_ACS_DIV4 | OR_BI | OR_SCY_3_CLK | OR_TRLX | OR_EHTR) #define CFG_OR0_PRELIM (CFG_PRELIM_OR_AM | CFG_OR_TIMING_FLASH) #define CFG_BR0_PRELIM ((FLASH_BASE_PRELIM & BR_BA_MSK) | (BR_PS_8 & BR_PS_MSK) | BR_V) #define SDRAM_BASE_PRELIM 0x00000000 #define SDRAM_MAX_SIZE 0x01000000 #define CFG_OR_TIMING_SDRAM (OR_G5LA | OR_G5LS) #define CFG_OR2_PRELIM (CFG_PRELIM_OR_AM | CFG_OR_TIMING_SDRAM ) #define CFG_BR2_PRELIM ((SDRAM_BASE_PRELIM & BR_BA_MSK) | BR_MS_UPMA | BR_V ) #define CFG_NVRAM_BASE 0xFA000000 #define CFG_OR4_PRELIM (CFG_PRELIM_OR_AM | CFG_OR_TIMING_FLASH) #define CFG_BR4_PRELIM ((CFG_NVRAM_BASE & BR_BA_MSK) | (BR_PS_8 & BR_PS_MSK) | BR_V | OR_EHTR) I would appreciate anyones input, since I'm not too familiar with the U-Boot beyond the board specific files. Thanks in advance! -Jeff Stevens __________________________________ Do you Yahoo!? New Yahoo! Photos - easier uploading and sharing. http://photos.yahoo.com/

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