[RFC] Make BootX from Mac OS X 10.4 work

[Alexander Graf]

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.

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] );

[Igor Kovalenko]

On Thu, Jul 30, 2009 at 8:00 PM, Alexander Graf wrote:
> 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.
>
> 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.

While working on sparc64 ofmem patch I used ppc/qemu ofmem
implementation as reference. What I noticed is there are several
corner cases not handled by range lists code; I fixed several ones
for sparc64.

Hope we can work out good common ofmem base soon.

[Alexander Graf]

On 31.07.2009, at 08:22, Igor Kovalenko wrote:
> On Thu, Jul 30, 2009 at 8:00 PM, Alexander Graf wrote:
> > 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.
> >
> > 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.
>
> While working on sparc64 ofmem patch I used ppc/qemu ofmem
> implementation as reference. What I noticed is there are several
> corner cases not handled by range lists code; I fixed several ones
> for sparc64.

It looked like the real problem was the low level hash entry  
mechanism, which is the one I changed.
> Hope we can work out good common ofmem base soon.

That would still be great. In fact, hearing that all other targets  
broke anyways, it might make sense to take the qemu/ directory and  
just make it the default for all of ppc.

From there on going towards merging different architectures as well  
sounds like a really good idea.

Alex

[Igor Kovalenko]

On Fri, Jul 31, 2009 at 10:28 AM, Alexander Graf wrote:
> On 31.07.2009, at 08:22, Igor Kovalenko wrote:
> > On Thu, Jul 30, 2009 at 8:00 PM, Alexander Graf wrote:
> > > 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.
> > >
> > > 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.
> >
> > While working on sparc64 ofmem patch I used ppc/qemu ofmem
> > implementation as reference. What I noticed is there are several
> > corner cases not handled by range lists code; I fixed several ones
> > for sparc64.
>
> It looked like the real problem was the low level hash entry mechanism,
> which is the one I changed.
> > Hope we can work out good common ofmem base soon.
>
> That would still be great. In fact, hearing that all other targets broke
> anyways, it might make sense to take the qemu/ directory and just make it
> the default for all of ppc.

If you mean building for ppc, it is already the default (only ppc/qemu
is enabled in configuration examples.)

The build problem for others was introduced in commit
r362 "Really create a tree for PCI devices (Laurent Vivier)"
I cannot figure out what exactly caused a problem.
> From there on going towards merging different architectures as well sounds
> like a really good idea.

I like reducing code duplication :)

[Blue Swirl]

On Thu, Jul 30, 2009 at 7:00 PM, Alexander Graf wrote:
> 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.
>
> 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.

mac99 also should do something. What machines have the best support?
> 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;

Is the loader trying to install these callbacks or does it assume that
they exist already?

[Alexander Graf]

On 31.07.2009, at 12:46, Blue Swirl wrote:
> On Thu, Jul 30, 2009 at 7:00 PM, Alexander Graf wrote:
> > 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.
> >
> > 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.
>
> mac99 also should do something. What machines have the best support?
> > 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;
>
> Is the loader trying to install these callbacks or does it assume that
> they exist already?

It installs them in the interpret call I marked above.

Alex

[Alexander Graf]

On 31.07.2009, at 12:46, Blue Swirl wrote:
> On Thu, Jul 30, 2009 at 7:00 PM, Alexander Graf wrote:
> > 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.
> >
> > 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.
>
> mac99 also should do something. What machines have the best support?
> > 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;

In fact, it does this:
> > interpret  hex unselect-dev " /packages" find-device new-device "

sl_words" device-name : open true ; : close ; 0 value outputLevel :  
slw_set_output_level   dup 0= if 0 stdout ! then   to outputLevel ; :  
slw_emit 2 outputLevel <= if emit else drop then ; : slw_cr   2  
outputLevel <= if cr then ; 0 value keyboardIH 20 buffer: keyMap :  
slw_init_keymap   to keyboardIH   keyMap dup 20 0 fill ; :  
slw_update_keymap { ; dpth }   depth -> dpth   keyboardIH if     " get- 
key-map" keyboardIH $call-method     depth dpth - 1 = if 20 then      
4 / 0 do       dup i 4 * + l@ keyMap i 4 * + tuck l@ or swap l!      
loop drop   then ; 0 value screenIH 0 value cursorAddr 0 value cursorX  
0 value cursorY 0 value cursorW 0 value cursorH 0 value cursorFrames 0  
value cursorPixelSize 0 value cursorStage 0 value cursorTime 0 value  
cursorDelay : slw_spin   screenIH 0<> cursorAddr 0<> and if     get- 
msecs dup cursorTime - cursorDelay >= if       to cursorTime        
slw_update_keymap       cursorStage 1+ cursorFrames mod dup to  
cursorStage of_client_interface: finddevice 56128f0
> >           ns = strstr((char*)pb->args[0], "dev /chosen ");
> >           if (ns) memcpy(ns, " \" /chosen\"", 11);
> > interpret  dev /chosen new-device " memory-map" device-name active-

package device-end ([1] -- [2])

Alex

[Laurent Vivier]

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 ?
How to boot ?

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] );

[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] );