I am trying to get the 8555EP running with u-boot-1.1.6. I had previously received a u-boot-1.1.4 from Freescale with functioning 8555EP support, but when I put the 8555EP bsp into the 1.1.6 source, although it compiles and runs a bit, it does a bad trap at d00 (DataTLBError) when running.
The trap occurs in env_relocate when malloc() is run. It appears to be the second or third malloc, not the first and I have looked at the bins in the malloc area and they are all just below the top of the 64Mb of ram nead 0x03ffffff.
I wonder if someone could offer a spot of advice on where to look for troubles with malloc working in this environment as to where I might go looking next.
Charles
p.s. I apologize if this comes out html as I am using VPN back to the company webmail as I needed to head for home to cloister myself for a couple of days.
Hi,
I would like to run complete u-boot image ( on MIPS processor) from SDRAM instead of flash.
Could you suggest me how to do?. I tried but somehow first 0x800 start up code is not mapping on to SDRAM.
I think i need to change u-boot.lds script.
Can you give some pointers on this.
Regards, Sathesh
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In message 998418.53833.qm@web7905.mail.in.yahoo.com you wrote:
I would like to run complete u-boot image ( on MIPS processor) from SDRAM instead of flash.
Could you suggest me how to do?.
Please read the FAQ: http://www.denx.de/wiki/view/DULG/CanUBootBeConfiguredSuchThatItCanBeStarted...
I think i need to change u-boot.lds script.
...and some other, highly critical things.
--0-1947689139-1166413831=:53833 Content-Type: text/html; charset=iso-8859-1 Content-Transfer-Encoding: 8bit
Please never post HTML here.
Best regards,
Wolfgang Denk
Hi Denk, Could you clarify the following. - If we want use u-boot in embedded system, The initial part of u-boot runs from the Flash.So Flash is mandatory.
My goal is : On my embedded platform, the flash is not yet ready.So i wanted to load u-boot on DDRAM/SRAM by changing the TEXT address and set PC to start of start () using JTAG debugger.
could you please clarify Is it possible to boot from RAM as i mentioned above.
Any environment variables are access from the Flash during u-boot bootup time.
Regards, Sathesh
Wolfgang Denk wd@denx.de wrote: In message 998418.53833.qm@web7905.mail.in.yahoo.com you wrote:
I would like to run complete u-boot image ( on MIPS processor) from SDRAM instead of flash.
Could you suggest me how to do?.
Please read the FAQ: http://www.denx.de/wiki/view/DULG/CanUBootBeConfiguredSuchThatItCanBeStarted...
I think i need to change u-boot.lds script.
...and some other, highly critical things.
--0-1947689139-1166413831=:53833 Content-Type: text/html; charset=iso-8859-1 Content-Transfer-Encoding: 8bit
Please never post HTML here.
Best regards,
Wolfgang Denk
----- Original Message ----- From: "sathesh babu" sathesh_edara2003@yahoo.co.in To: "Wolfgang Denk" wd@denx.de Cc: u-boot-users@lists.sourceforge.net Sent: Tuesday, December 19, 2006 7:10 PM Subject: Re: [U-Boot-Users] Running U-boot on RAM
Hi Denk, Could you clarify the following.
- If we want use u-boot in embedded system, The initial part of u-boot runs from the Flash.So Flash is mandatory.
My goal is : On my embedded platform, the flash is not yet ready.So i wanted to load u-boot on DDRAM/SRAM by changing the TEXT address and set PC to start of start () using JTAG debugger.
The AT91RM9200 works this way when you boot from an SPI dataflash. The internal BootROM will load the dataflashboot.bin application from the first couple of pages of the SPI dataflash into internal SRAM. Once loaded, the bootROM will jump to the beginning of the dataflashboot.bin Dataflashboot.bin will copy the u-boot from a fixed address in the SPI dataflash to the SDRAM and jump to the beginning of U-boot.
Wolfgang kept rejecting ideas, sometimes for good reasons,so I got fed up. May try to do something about it later. You can find my stuff at ftp://at91dist:distrib@81.80.104.162/ -> third party linux -> u-boot
could you please clarify Is it possible to boot from RAM as i mentioned above.
Any environment variables are access from the Flash during u-boot bootup time.
Regards, Sathesh
Best Regards Ulf Samuelsson ulf@atmel.com Atmel Nordic AB Mail: Box 2033, 174 02 Sundbyberg, Sweden Visit: Kavallerivägen 24, 174 58 Sundbyberg, Sweden Phone +46 (8) 441 54 22 Fax +46 (8) 441 54 29 GSM +46 (706) 22 44 57
Technical support when I am not available: AT89 C51 Applications Group: mailto:micro.hotline@nto.atmel.com AT90 AVR Applications Group: mailto:avr@atmel.com AT91 ARM Applications Group: mailto:at91support@atmel.com FPSLIC Application Group: mailto:fpslic@atmel.com Best AVR link: www.avrfreaks.net
In message 20061219181035.71719.qmail@web7909.mail.in.yahoo.com you wrote:
- If we want use u-boot in embedded system, The initial part of u-boot runs from the Flash.So Flash is mandatory.
Not really. It depends on your architecture, i. e. which features are supported by your processor, and how your baord was designed. There are systems completely without any flash. There are other systems without any NOR flash (using NAND flash only). There are ... many options.
My goal is : On my embedded platform, the flash is not yet ready.So i wanted to load u-boot on DDRAM/SRAM by changing the TEXT address and set PC to start of start () using JTAG debugger.
Yes, I understood this when you asked the fist time.
could you please clarify Is it possible to boot from RAM as i mentioned above.
I pointed you to the FAQ entry, which explains the situation.
Any environment variables are access from the Flash during u-boot bootup time.
Maybe, maybe not. This depends on your configuration and the changes you made to support booting from RAM.
Best regards,
Wolfgang Denk
participants (4)
-
Charles Krinke -
sathesh babu -
Ulf Samuelsson -
Wolfgang Denk