From: Sergei Shtylyov <sshtylyov@ru.mvista.com>
To: Ralf Baechle <ralf@linux-mips.org>
Cc: Wu Zhangjin <wuzhangjin@gmail.com>,
linux-mips@linux-mips.org, "Rafael J. Wysocki" <rjw@sisk.pl>,
Pavel Machek <pavel@ucw.cz>
Subject: Re: [PATCH] MIPS: fix pfn_valid() for FLAGMEM
Date: Fri, 09 Oct 2009 19:43:12 +0400 [thread overview]
Message-ID: <4ACF5A10.3020406@ru.mvista.com> (raw)
In-Reply-To: <20091008185012.GA10365@linux-mips.org>
Hello.
Ralf Baechle wrote:
>>>Are the non-memory parts marked as reserved?
>>No, so, is that a need to mark them?
> Initially all pages are marked as reserved.
> Which seems to be good enough for x86:
> $ cat /proc/iomem
> 00000000-0009efff : System RAM
> 0009f000-0009ffff : reserved
> 000c0000-000cffff : pnp 00:0d
> 000e0000-000fffff : pnp 00:0d
> 00100000-7fe5b7ff : System RAM
> [...]
> The 0x9f000 - 0x9ffff range is the good old ISA I/O memory range (classic
> MDA/CGA/VGA etc.), that is non-memory yet:
Not really, it's a usual RAM. CGA/VGA video memory occupies
000a0000-000bffff and MDA occupies 000b0000-000b7ffff (if not less). This
range is probably reserved by BIOS for something like EBDA...
WBR, Sergei
next prev parent reply other threads:[~2009-10-09 15:40 UTC|newest]
Thread overview: 12+ messages / expand[flat|nested] mbox.gz Atom feed top
2009-10-08 8:57 [PATCH] MIPS: fix pfn_valid() for FLAGMEM Wu Zhangjin
2009-10-08 9:29 ` Pavel Machek
2009-10-08 10:33 ` Wu Zhangjin
2009-10-08 10:36 ` Pavel Machek
2009-10-08 10:57 ` Wu Zhangjin
2009-10-08 9:58 ` Sergei Shtylyov
2009-10-08 10:36 ` Wu Zhangjin
2009-10-08 14:42 ` Ralf Baechle
2009-10-08 15:46 ` Wu Zhangjin
2009-10-08 18:50 ` Ralf Baechle
2009-10-09 15:43 ` Sergei Shtylyov [this message]
2009-10-09 15:48 ` Sergei Shtylyov
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