From: Gleb Natapov <gleb@redhat.com>
To: Sebastian Herbszt <herbszt@gmx.de>
Cc: bochs-developers@lists.sourceforge.net, qemu-devel@nongnu.org
Subject: [Qemu-devel] Re: [Bochs-developers] [PATCH 5/6] Don't use unreserved memory inBIOS.
Date: Mon, 3 Nov 2008 08:29:56 +0200 [thread overview]
Message-ID: <20081103062956.GF16809@redhat.com> (raw)
In-Reply-To: <415897ECFCCD4BBFADA9C20FB62CD1C4@FSCPC>
On Mon, Nov 03, 2008 at 12:44:26AM +0100, Sebastian Herbszt wrote:
> Gleb Natapov wrote:
>> On Fri, Oct 31, 2008 at 12:12:00AM +0100, Sebastian Herbszt wrote:
>>> Gleb Natapov wrote:
>>>> diff --git a/bios/rombios.h b/bios/rombios.h
>>>> index f0ed88e..57b0f46 100644
>>>> --- a/bios/rombios.h
>>>> +++ b/bios/rombios.h
>>>> @@ -56,7 +56,7 @@
>>>> #define ACPI_DATA_SIZE 0x00010000L
>>>> #define PM_IO_BASE 0xb000
>>>> #define SMB_IO_BASE 0xb100
>>>> -#define CPU_COUNT_ADDR 0xf000
>>>> +#define CPU_COUNT_ADDR 0x0500
>>>
>>> Why did you pick 0x500?
>>>
>> Cool number, don't you think so? It is unused location in a first page.
>> if 0x666 is unused we can use it instead.
>
> Actually 0050h:0000h seems to be used for PRINT-SCREEN STATUS.
> This byte is used by the int 5h service, which is currently not
> implemented. The EBDA could be used here or some reserved BDA
> space (e.g. 0x4d0, 0x4ac).
>
The memory location can be reused after smp initialization.
--
Gleb.
next prev parent reply other threads:[~2008-11-03 6:30 UTC|newest]
Thread overview: 18+ messages / expand[flat|nested] mbox.gz Atom feed top
2008-10-27 10:12 [Qemu-devel] [PATCH 0/6] Support for S3 ACPI state (suspend to memory) in BIOS Gleb Natapov
2008-10-27 10:12 ` [Qemu-devel] [PATCH 1/6] Move PIC initialization out of line to save space in post code area Gleb Natapov
2008-10-27 10:13 ` [Qemu-devel] [PATCH 2/6] Add S3 state to DSDT. Handle resume event in the BIOS Gleb Natapov
2008-10-30 22:41 ` [Qemu-devel] Re: [Bochs-developers] [PATCH 2/6] Add S3 state to DSDT. Handle resumeevent " Sebastian Herbszt
2008-11-02 10:04 ` Gleb Natapov
2008-11-02 18:13 ` [Qemu-devel] Re: [Bochs-developers] [PATCH 2/6] Add S3 state to DSDT. Handleresumeevent " Sebastian Herbszt
2008-11-02 18:39 ` Gleb Natapov
2008-11-02 16:31 ` [Qemu-devel] Re: [Bochs-developers] [PATCH 2/6] Add S3 state to DSDT. Handle resumeevent " Kevin O'Connor
2008-11-02 23:28 ` [Qemu-devel] Re: [Bochs-developers] [PATCH 2/6] Add S3 state to DSDT. Handleresumeevent " Sebastian Herbszt
2008-11-03 0:03 ` Kevin O'Connor
2008-10-27 10:13 ` [Qemu-devel] [PATCH 3/6] Disable init of SMM Gleb Natapov
2008-10-27 10:13 ` [Qemu-devel] [PATCH 4/6] Execute rombios32 code from rom address 0xe0000 Gleb Natapov
2008-10-27 10:13 ` [Qemu-devel] [PATCH 5/6] Don't use unreserved memory in BIOS Gleb Natapov
2008-10-30 23:12 ` [Qemu-devel] Re: [Bochs-developers] " Sebastian Herbszt
2008-11-02 10:06 ` Gleb Natapov
2008-11-02 23:44 ` [Qemu-devel] Re: [Bochs-developers] [PATCH 5/6] Don't use unreserved memory inBIOS Sebastian Herbszt
2008-11-03 6:29 ` Gleb Natapov [this message]
2008-10-27 10:13 ` [Qemu-devel] [PATCH 6/6] Don't power down vga card on entering S3 state Gleb Natapov
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