Re: are they physical address?

manish regmi
2004-10-08T08:56:03Z

On Fri, 8 Oct 2004 08:14:25 +0100 (BST), Ankit Jain
<ankitjain1580@yahoo.com> wrote:
> hi
>
> http://www.xml.com/ldd/chapter/book/ch02.html
>
> 00000000-0009fbff : System RAM
> 0009fc00-0009ffff : reserved
> 000a0000-000bffff : Video RAM area
> 000c0000-000c7fff : Video ROM
> 000f0000-000fffff : System ROM
> 00100000-03feffff : System RAM
> 00100000-0022c557 : Kernel code
> 0022c558-0024455f : Kernel data
> 20000000-2fffffff : Intel Corporation 440BX/ZX -
> 82443BX/ZX Host bridge
> 68000000-68000fff : Texas Instruments PCI1225
> 68001000-68001fff : Texas Instruments PCI1225 (#2)
> e0000000-e3ffffff : PCI Bus #01
> e4000000-e7ffffff : PCI Bus #01
> e4000000-e4ffffff : ATI Technologies Inc 3D Rage LT
> Pro AGP-133
> e6000000-e6000fff : ATI Technologies Inc 3D Rage LT
> Pro AGP-133
> fffc0000-ffffffff : reserved
> what is it reserved for?
>
> if somebody can explin me this:
>
> "Once again, the values shown are hexadecimal ranges,
> and the string after the colon is the name of the
> "owner" of the I/O region. "
>
> thanks
>
> ankit

Hi,
Yes that is the Physical address.
It means The address are given in Hexadecimal Values. In order to use
the memory region, The driver should request the region by,
int request_mem_region(unsigned long start, unsigned long len,
char *name);
start and end are the address range and name is the owner's name.
So if you do,
request_mem_region(0xe7000000, 0xea000000, "Ankit");
You will see,
e7000000-ea000000 : Ankit

I think it clears some doubt.

Regards
manish