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Date: Mon, 9 Jul 2007 20:06:01 +0300
From: "Blue Swirl" <blauwirbel@gmail.com>
Subject: Re: [Qemu-devel] 32 bit emulating 64 bit
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To: qemu-devel@nongnu.org

On 7/9/07, Nigel Horne <njh@bandsman.co.uk> wrote:
> Is it possible to use a 32 bit host to run a 64 bit guest? I can't get the IA64 version
> of FreeBSD6.2 to boot under my 32 bit Linux, qemu just changes its status bar to QEMU [ stopped ]
> no reason or message is printed, it just silently stops.

Generally yes, I don't know about IA64 status. For example Sparc64
emulator on x86 runs as fine as on x86-64:
OpenBIOS for Sparc64
boot arg = 0x0

00000000-08000000
RAM 128 MB
forth started.
initializing memory...done
Initializing PCI devices...
0:0.0 - 108e:a000 - /pci/pci108e,a000 - host
0:1.0 - 108e:5000 - /pci/pci108e,5000 - pci
0:1.1 - 108e:5000 - /pci/pci108e,5000 - pci
0:2.0 - 1013:b8 - /pci/pci1013,b8 - display
0:3.0 - 10ec:8029 - /pci/pci10ec,8029 - ethernet
0:4.0 - 8086:7010 - /pci/pci8086,7010 - ide
ide0: [io ports 0x1f0-0x1f7,0x3f6]
    drive0 [ATA disk]: QEMU HARDDISK
ide1: [io ports 0x170-0x177,0x376]
    drive0 [ATAPI floppy]: QEMU CD-ROM
floppy_init
FDC is a S82078B
floppy_reset
floppy_motor_off
SENSEI 20 00
status = 80, reply_buffer= 20 0
fdc_specify
FD_SPECIFY(c1, 11)
set_drive status = 80, new_dor = 10
floppy_recalibrate
fdc_state.version = 0062
invalid nvram partition length
nvram error detected, zapping pram
falling off...
Unhandled Exception 0x0000000000000008
PC = 0x0000000000000008 NPC = 0x000000000000000c
Stopping execution

The physical address space is much larger than 4G.