Help with crash

Hi All,

I have been making some progress with porting U-Boot to a 7400/107 board. I now have serial out, but crash before the code is relocated to RAM. Can anyone help me please?

The last thing I see on the serial console is:

Reserving 48 Bytes for Global Data at: 03fc9f98

I think the address looks OK as I have 64MB RAM on this board so Global Data is just below the top of that.

This is where I get to in lib_ppc/board.c:

	/*
	 * Finally, we set up a new (bigger) stack.
	 *
	 * Leave some safety gap for SP, force alignment on 16 byte
boundary
	 * Clear initial stack frame
	 */
	addr_sp -= 16;
fff036b4  subi    r31,r26,0x1078
fff036b8  crclr   cr6
fff036bc  bl      printf
	debug ("Reserving %d Bytes for Global Data at: %08lx\n",
fff036c0  li      r4,0x30
fff036c4  lwz     r3,-0x7FC4(r30)
fff036c8  mr      r5,r24
	addr_sp &= ~0xF;
fff036cc  clrrwi  r31,r31,4
fff036d0  crclr   cr6
fff036d4  bl      printf
fff036d8  mr      r11,r31
fff036dc  subi    r31,r31,4
fff036e0  stw     r25,__fixup_entries(r11)           <== Crash here
	*((ulong *) addr_sp)-- = 0;
	debug ("Stack Pointer at: %08lx\n", addr_sp);
fff036e4  lwz     r3,-0x7FC0(r30)
fff036e8  stw     r25,__fixup_entries(r31)
fff036ec  subi    r31,r31,4
fff036f0  mr      r4,r31
fff036f4  crclr   cr6
fff036f8  bl      printf

When I step through the instruction at fff036e0 I end up@700, which is the Program Exception vector (srr0 = 0x800, srr1 = 80000) which implies an illegal instruction?

From the System.map file I can see that __fixup_entries is 0. Is this
correct?

Can anyone suggest where I should be looking to fix this? I appreciate I have not given much info, I can send more if you let me know what you need.

Thanks
Rich

The problem was a typo in my config file. Was loading DBAT0 with the values from IBAT1 instead of IBAT0.

Rich

Hi all,

My custom board has the PCI to ATA chip Silicon Image 0680A, which connects to the CompactFlash Storage Card that acts as a standard IDE disk if configured right. Anyone knows if U-boot already had the implementation for the Silicon Image 0680A and CF-ATA drive? I looked through the source code but didn't find anything. If not, any recommendations of how to implement them?

Any pointer is appreciated.

Sam

____________________________________________________
Yahoo! Sports
Rekindle the Rivalries. Sign up for Fantasy Football
http://football.fantasysports.yahoo.com

No.

Find the Linux driver for this controller, analyze it, and port the unavoidable parts of it to U-Boot.

Best regards,

Wolfgang Denk

Software Engineering:  Embedded and Realtime Systems,  Embedded Linux
Phone: (+49)-8142-66989-10 Fax: (+49)-8142-66989-80 Email: wd at denx.de
To know how another being, another creature feels -  that  is  impos-
sible.                  - Terry Pratchett, _The Dark Side of the Sun_

Thanks. This would help for starting.

Sam

____________________________________________________
Yahoo! Sports
Rekindle the Rivalries. Sign up for Fantasy Football
http://football.fantasysports.yahoo.com