* Configuring Memory Address Space
@ 2005-03-21 14:21 Raghu
2005-03-21 14:25 ` David Vrabel
0 siblings, 1 reply; 2+ messages in thread
From: Raghu @ 2005-03-21 14:21 UTC (permalink / raw)
To: ecos
Hi,
I have a custom IXP425 based board. And following
memory map.
0x5000.0000 CS0 Boot Flash, size 8 MBytes
0x5200.0000 CS2 FPGA Reg, size 16 MBytes
0x5300.0000 CS3 LIC Reg, size 16 MBytes
The CS2 ( FPGA ) registers are 16 bit registers, so
the CS2 i.e. 0xC4000008 = 0xBFFF3C02
The CS4 ( LIC ) resisters are 8 bit registers, so
the CS3 i.e. 0xC400000C = 0xBFFF3C43
In the hal_platform_setup.h file, I used the macro,
IXP_MAP_EXP 2, ( 1 << 24 ), 0, 0, 0, 0 // 0x52000000
IXP_MAP_EXP 3, ( 1 << 24 ), 0, 0, 0, 0 // 0x53000000
But in Redboot when I dump these address locations,
I get "illegal access"
----------------------------------------------------
RedBoot> x -b 0xc4000000 -l 16 -4
C4000000: BFFF3C42 BFFF3842 BFFF3C02 BFFF3C43
RedBoot> x -b 0x52000000 -l 16 -2
illegal mem
RedBoot> x -b 0x53000000 -l 16 -2
illegal mem
----------------------------------------------------
Is the MMU setting an issue ?? Thanks in advance.
Regards,
Raghu
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^ permalink raw reply [flat|nested] 2+ messages in thread
* Re: Configuring Memory Address Space
2005-03-21 14:21 Configuring Memory Address Space Raghu
@ 2005-03-21 14:25 ` David Vrabel
0 siblings, 0 replies; 2+ messages in thread
From: David Vrabel @ 2005-03-21 14:25 UTC (permalink / raw)
To: Raghu; +Cc: ecos
Raghu wrote:
>
> Is the MMU setting an issue ?? Thanks in advance.
I suspect so. Take a look at hal_platform_extras.h
David Vrabel
--
David Vrabel, Design Engineer
Arcom, Clifton Road Tel: +44 (0)1223 411200 ext. 3233
Cambridge CB1 7EA, UK Web: http://www.arcom.com/
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2005-03-21 14:25 ` David Vrabel
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