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Unable to Boot (RedBoot ) standalone
- From: Ashish Ranjan <ranjan_ash2004 at yahoo dot com>
- To: ecos-discuss at ecos dot sourceware dot org
- Date: Fri, 28 Oct 2005 00:27:16 -0700 (PDT)
- Subject: [ECOS] Unable to Boot (RedBoot ) standalone
Hello All,
Please help me I have two problems rigth now and i am
new to ECOS.
I am trying to port redboot on the Card having MPC860
and startup type is ROM.The card has the SDRAM
(0x00000000 - 0x00FFFFFF) and ROM (0x30000000 -
0x303FFFFF).When I program the flash and run the
RedBoot.elf through lauterbach(ICD), I get the RedBoot
prompt on Hyperterminal. But when I power-on the Card
without the Emulator, i am unable to get the RedBoot
prompt(nothing happens).
There is one more problem,it happens sometimes.In this
case,I am unable to the RedBoot prompt. The
IP(Instruction Pointer) move to an address 0x8001002C
and get halted as I have seen with the help of
debugger. Problem is : When a address is pushed into
the stack and when it is poped up the value is not the
same.Why it happens?what would be the reason?
Few line of Code and Register contents are:
// Content of register r1=59FC
LR=0x30009B44
stwu r1,-0x28(r1) //store the content of r1-0x28
at a location there r1 ponits
and update the value of
r1 => r1=59D4
mflr r0 // move the content from link
reg. in r0
=> r0=0x30009B44
stw r0,0x2C(r1) // store the value of r0 at
r1+0x2C
It means 0x30009B44 should be at 0x5A00.but when this
value is retrive back it become 0x8001002C.How it
happen I don't know.
Please help me........
Thanks
Ashish
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