[U-Boot-Users] Help with crash

[U-Boot-Users] Help with crash

[Richard Danter]

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

[U-Boot-Users] Help with crash -- SOLVED

[Richard Danter]

Richard Danter wrote:
> 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 at 700, which 
> is the Program Exception vector (srr0 = 0x800, srr1 = 80000) which 
> implies an illegal instruction?

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

Rich

[U-Boot-Users] Silicon Image 0680A and CF-ATA drive

[Sam Pham]

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


		
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[U-Boot-Users] Silicon Image 0680A and CF-ATA drive

[Wolfgang Denk]

In message <20050705161452.30133.qmail@web54108.mail.yahoo.com> you wrote:
> 
> 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

No.

> looked through the source code but didn't find
> anything.  If not, any recommendations of how to
> implement them?

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_

[U-Boot-Users] Silicon Image 0680A and CF-ATA drive

[Sam Pham]

--- Wolfgang Denk <wd@denx.de> wrote:

> In message
> <20050705161452.30133.qmail@web54108.mail.yahoo.com>
> you wrote:
> > 
> > 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
> 
> No.
> 
> > looked through the source code but didn't find
> > anything.  If not, any recommendations of how to
> > implement them?
> 
> Find the Linux driver for this controller, analyze
> it, and  port  the
> unavoidable parts of it to U-Boot.

Thanks.  This would help for starting.

Sam


> 
> 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_
> 



		
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