From: manish regmi <regmi.manish@gmail.com>
To: Ankit Jain <ankitjain1580@yahoo.com>
Cc: linux-newbie@vger.kernel.org
Subject: Re: are they physical address?
Date: Fri, 8 Oct 2004 14:41:03 +0545 [thread overview]
Message-ID: <652016d30410080156652fc840@mail.gmail.com> (raw)
In-Reply-To: <20041008071425.96875.qmail@web52906.mail.yahoo.com>
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
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next prev parent reply other threads:[~2004-10-08 8:56 UTC|newest]
Thread overview: 8+ messages / expand[flat|nested] mbox.gz Atom feed top
2004-10-08 7:14 are they physical address? Ankit Jain
2004-10-08 8:56 ` manish regmi [this message]
2004-10-08 9:49 ` Jim Nelson
2004-10-08 12:05 ` Ankit Jain
2004-10-08 21:50 ` Jim Nelson
2004-10-08 22:18 ` Jim Nelson
2004-10-09 8:58 ` Ankit Jain
2004-11-25 7:45 ` are they " Ratnadeep Joshi
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