> On Aug 9, 2018, at 5:35 PM, qemu-devel-requ...@nongnu.org wrote:
>
> Date: Thu, 9 Aug 2018 22:40:10 +0200
> From: Herv? Poussineau <hpous...@reactos.org>
> To: qemu-devel@nongnu.org
> Cc: Mark Cave-Ayland <mark.cave-ayl...@ilande.co.uk>, David Gibson
> <da...@gibson.dropbear.id.au>, Alexander Graf <ag...@suse.de>,
> qemu-...@nongnu.org, Herv? Poussineau <hpous...@reactos.org>
> Subject: [Qemu-devel] [PATCH 2/2] hw/ppc: deprecate the machine type
> 'prep', replaced by '40p'
> Message-ID: <20180809204010.3579-3-hpous...@reactos.org>
> Content-Type: text/plain; charset=UTF-8
>
> - prep machine is a fictional machine, so has no specifications. Which
> devices can be changed/added/removed without impact? Are interrupts
> correctly mapped?
> - prep firmware (OHW) has support only for IDE drives (no SCSI).
> Booting from IDE has been broken approximatively 3 years ago, and nobody
> complained.
> - OHW is limited on IDE boot to a specific set of OS loaders.
> These operating systems are of the 2004 time frame.
> - OHW can use -kernel. Linux kernel freezes a long time after PS/2 mouse
> detection, and then screen becomes garbage. This was already broken in
> QEMU v2.7, 2 years ago, and nobody complained.
>
> On the other side:
> - 40p is a real machine, so emulation can be checked against
> hardware specifications
> - OpenBIOS has support for SCSI block devices, including 40p LSI adapter
> - OpenBIOS can start mostly all Linux kernels (including recent ones)
> and recent operating system (like NetBSD 7.1.2)
>
> Signed-off-by: Herv? Poussineau <hpous...@reactos.org>
> ---
> hw/ppc/prep.c | 1 +
> 1 file changed, 1 insertion(+)
>
> diff --git a/hw/ppc/prep.c b/hw/ppc/prep.c
> index 1558855247..fbcaebabc0 100644
> --- a/hw/ppc/prep.c
> +++ b/hw/ppc/prep.c
> @@ -676,6 +676,7 @@ static void ppc_prep_init(MachineState *machine)
>
> static void prep_machine_init(MachineClass *mc)
> {
> + mc->deprecation_reason = "use 40p machine type instead";
> mc->desc = "PowerPC PREP platform";
> mc->init = ppc_prep_init;
> mc->block_default_type = IF_IDE;
> --
> 2.11.0
Can a real 40p machine boot Windows NT 4.0 PowerPC?
