[OpenBIOS] [RFC] Make BootX from Mac OS X 10.4 work

[Alexander Graf]

On 10.08.2009, at 00:51, Laurent Vivier wrote:

> Le jeudi 30 juillet 2009 à 18:00 +0200, Alexander Graf a écrit :
>> Using this patch stacked on Steven Noonan's I was able to make  
>> BootX from
>> Mac OS X 10.4 load XNU successfully in qemu-system-ppc.
>
> Hi,
>
> I'd like to play with that.
>
> Which patches to apply before ?

I took those rebased on current git:

http://github.com/tycho/openbios/tree/macosx-boot

> How to boot ?

The normal way. Just use -boot d. So far only the 10.4 CD did boot IIRC.

Alex

>
> Regards,
> Laurent
>
>> Unfortunately, most of this patch is nothing but a mere hack to  
>> find out
>> what we really need to get this working.
>>
>> Also I didn't manage to get anything but 10.4 running. Other  
>> versions broke
>> in the partition table interpretation.
>>
>> I would not feel good taking the patch as is, because it would be  
>> better to
>> implement the correct Forth magic to make the real callbacks work.  
>> Here is
>> what I found to be broken:
>>
>>  - unselect-dev is missing
>>  - local variables don't work ({ ... })
>>  - I ran into an endless loop, getting isi and dsi faults on the  
>> same 2
>>    addresses all the time
>>
>> Also, Qemu's only usable Desktop PPC target is a G3 Beige which is  
>> only
>> supported up to 10.2.8 IIRC. So even getting the bootloader running  
>> for
>> 10.4 didn't exactly buy me much.
>>
>> Don't apply the patch as is!
>> It'd be great to see someone build on this!
>> ---
>> arch/ppc/qemu/ofmem.c |    4 ++--
>> modules/client.c      |   40 ++++++++++++++++++++++++++++++++++++++++
>> 2 files changed, 42 insertions(+), 2 deletions(-)
>>
>> diff --git a/arch/ppc/qemu/ofmem.c b/arch/ppc/qemu/ofmem.c
>> index a1a8fb1..32642e2 100644
>> --- a/arch/ppc/qemu/ofmem.c
>> +++ b/arch/ppc/qemu/ofmem.c
>> @@ -716,8 +716,8 @@ hash_page_32( ulong ea, ulong phys, int mode )
>>
>> 	/* out of slots, just evict one */
>> 	if( !found ) {
>> -		i = next_grab_slot + 1;
>> -		next_grab_slot = (next_grab_slot + 1) % 8;
>> +		i = next_grab_slot + 3;
>> +		next_grab_slot = (next_grab_slot + 3) % 8;
>> 	}
>> 	i--;
>> 	upte[i*2] = cmp;
>> diff --git a/modules/client.c b/modules/client.c
>> index a2e8405..a8c89ff 100644
>> --- a/modules/client.c
>> +++ b/modules/client.c
>> @@ -49,6 +49,46 @@ handle_calls( prom_args_t *pb )
>>                pb->nargs, pb->nret);
>> #endif
>>
>> +#if 1
>> +	if (!strcmp(pb->service, "interpret"))
>> +	{
>> +		char *ns;
>> +
>> +		ns = strstr((char*)pb->args[0], "{ ; dpth }");
>> +		if (ns) return 0;
>> +
>> +		ns = strstr((char*)pb->args[0], "dev /chosen ");
>> +		if (ns) memcpy(ns, " \" /chosen\"", 11);
>> +	}
>> +	else if (!strcmp(pb->service, "call-method"))
>> +	{
>> +		if (!strncmp((char*)pb->args[0], "slw_init_keymap", 15)) {
>> +
>> +			char *a = (char*)malloc(20);
>> +			memset(a, 0x00, 20);
>> +			pb->args[4] = (uint32_t)a;
>> +			pb->args[3] = 0;
>> +
>> +			return 0;
>> +		}
>> +		if (!strncmp((char*)pb->args[0], "slw_emit",  
>> strlen("slw_emit"))) {
>> +		        PUSH( (char)pb->args[2] );
>> +		        fword("emit");
>> +
>> +			return 0;
>> +		}
>> +		if (!strncmp((char*)pb->args[0], "slw_cr", strlen("slw_cr"))) {
>> +		        PUSH( '\n' );
>> +		        fword("emit");
>> +			return 0;
>> +		}
>> +		if (!strncmp((char*)pb->args[0], "slw_update_keymap",  
>> strlen("slw_update_keymap"))) return 0;
>> +		if (!strncmp((char*)pb->args[0], "slw_set_output_level",  
>> strlen("slw_set_output_level"))) return 0;
>> +		if (!strncmp((char*)pb->args[0], "slw_spin_init",  
>> strlen("slw_spin_init"))) return 0;
>> +		if (!strncmp((char*)pb->args[0], "slw_spin",  
>> strlen("slw_spin"))) return 0;
>> +	}
>> +#endif
>> +
>> 	for( i=pb->nargs-1; i>=0; i-- )
>> 		PUSH( pb->args[i] );
>>
>> -- 
>> 1.6.0.2
>>
>>
> -- 
> --------------------- laurent at vivier.eu ----------------------
> "Tout ce qui est impossible reste à accomplir"    Jules Verne
> "Things are only impossible until they're not" Jean-Luc Picard
>
>
> -- 
> OpenBIOS                 http://openbios.org/
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> Free your System - May the Forth be with you