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Re: Prob with flash_query
- From: Andrew Lunn <andrew at lunn dot ch>
- To: Ringo Pebam <ringo dot p at gmail dot com>
- Cc: ecos-discuss at ecos dot sourceware dot org
- Date: Wed, 23 Mar 2005 22:35:47 +0100
- Subject: Re: [ECOS] Prob with flash_query
- References: <96fd0f3205032307031acdb9cc@mail.gmail.com>
On Wed, Mar 23, 2005 at 08:33:22PM +0530, Ringo Pebam wrote:
> Hi,
>
> I am using the eCos bootloader, and the flash_query throws an exception as:
>
> 300005d8 <flash_query>:
> 300005d8: e52de004 str lr, [sp, -#4]!
> 300005dc: e59f2088 ldr r2, [pc, #136]; 3000066c __DTOR_END__+0x94>
> 300005e0: e3a030f0 mov r3, #240 ; 0xf0
> 300005e4: e1c230b0 strh r3, [r2]
> 300005e8: e3a0c000 mov ip, #0 ; 0x0
> 300005ec: e3a0e0aa mov lr, #170 ; 0xaa
> 300005f0: e59f3078 ldr r3, [pc, #120] ; 30000670
> ................................
>
>
> According to my flash memory layout, the address 0x300005d8 is
> supposed to be RAM area but it's being treated as Flash area.
What do you mean treated as flash area? Code which puts the flash into
a mode which means its not readable has to run in RAM. So the low
level flash driver functions are placed in RAM. Maybe this is
confusing you?
> I have one doubt: the flash_query that is called from flash_dev_query,
> is the one that is define in "/ecos_920t/packages/devs/flash/amd/am29xxxxx/
> current/include/flash_am29xxxxx.inl" or the one in define in
> "packages/devs/flash/
> synth/current/src/flash_query.c". Could you please confirm ?
The synth flash should only be used for the synthetic target. If you
are using that one on real hardware you are probably doing something
stupid.
Andrew
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