Thought I should post a follow-up, in case others might come across the
same problem.. I managed to set the registers with the multiple store
instruction..

	ADRL	r0, SystemInitDataSDRAM
	LDMIA	r0, {r1-r12}
	LDR   r0, =0x3FF0000 + 0x3010
	STMIA	r0, {r1-r12}

Grant Edwards wrote:
> On 2005-01-27, mantaray <egeus@rocketmail.com> wrote:
>
> > I am writing the firmware for a custom board which uses the Samsung
> > S3C4510B MCU. It board has 512KB of ROM and SRAM.
>
> There is one group of registers in the memory controller that
> must be written to as a group using a multiple-register-write
> command.  I don't remember which registers it is, but I tripped
> over that rule when trying to set up the memory map in a '4510.
>
> > Btw, what are the instructions for implementing copying of
> > codes from the ROM to SRAM after remapping?
>
> memcpy()
>
> --
> Grant Edwards                   grante             Yow!  Who wants
some
>                                   at               OYSTERS with
SEN-SEN an'
>                                visi.com            COOL WHIP?

>Btw, what are the instructions for implementing copying of codes from
>the ROM to SRAM after remapping?

Actually the C startup code should do this for you. 
-- 
42Bastian
Do not email to bastian42@yahoo.com, it's a spam-only account :-)
Use <same-name>@monlynx.de instead !

On 2005-01-27, mantaray <egeus@rocketmail.com> wrote:

> I am writing the firmware for a custom board which uses the Samsung
> S3C4510B MCU. It board has 512KB of ROM and SRAM.

There is one group of registers in the memory controller that
must be written to as a group using a multiple-register-write
command.  I don't remember which registers it is, but I tripped
over that rule when trying to set up the memory map in a '4510.

> Btw, what are the instructions for implementing copying of
> codes from the ROM to SRAM after remapping?

memcpy()

-- 
Grant Edwards                   grante             Yow!  Who wants some
                                  at               OYSTERS with SEN-SEN an'
                               visi.com            COOL WHIP?

Hello,

I am writing the firmware for a custom board which uses the Samsung
S3C4510B MCU. It board has 512KB of ROM and SRAM.

I would like to remap the memory into the following locations

ROM at Bank0: 0x00000000 - 0x00080000
RAM at Bank1: 0x00100000 - 0x00180000

In my assembly program, I initialised the control register with the
following instructions:

;Initialise SYSCFG register
LDR r0, =SYSCFG
LDR r1, =0x07FFFFA0
STR r1, [r0]

;Initialise EXTDBWTH register
LDR r0, =EXTDBWTH
LDR r1, =0x06
STR r1, [r0]

;Initialise ROMCON0 register
LDR r0, =ROMCON0
LDR r1, =0x00800060
STR r1, [r0]

;Initialise ROMCON1 register
LDR r0, =ROMCON0
LDR r1, =0x01804060
STR r1, [r0]

;Initialise REFEXTCON register
LDR r0, =REFEXTCON
LDR r1, =0x9C218360
STR r1, [r0]

I have used the same values to initialise the registers using AxD and
JEENI and it worked. I can access the RAM locations.

However when I run the above codes in the assembly program which I
downloaded into the ROM, it does not work. Its not the problem with the
rest of my codes as when I don't initialise the registers (ie. using
the default mem map), the program runs fine. Is there anything I missed
out?

Btw, what are the instructions for implementing copying of codes from
the ROM to SRAM after remapping?

Thanks in advance!

Rgds,
Leslie