[Qemu-devel] Updated OpenBIOS images

[Qemu-devel] Updated OpenBIOS images

[Blue Swirl]

Hi,

The updated Sparc32 image supports Sparcstation 10 machine. The
changes that disable interpose operation also make NetBSD CDs
unbootable, but on the other hand OpenBSD CDs start to show progress:
Boot loader is loaded, it loads kernel which then panics. SunOS
booting can be tried with this version.

The Sparc64 image can be booted using either VGA or serial. In both
cases, entering the Forth interpreter fails.

Re: [Qemu-devel] Updated OpenBIOS images

[Aurelien Jarno]

Blue Swirl a écrit :
> Hi,
> 
> The updated Sparc32 image supports Sparcstation 10 machine. The
> changes that disable interpose operation also make NetBSD CDs
> unbootable, but on the other hand OpenBSD CDs start to show progress:
> Boot loader is loaded, it loads kernel which then panics. SunOS
> booting can be tried with this version.
> 
> The Sparc64 image can be booted using either VGA or serial. In both
> cases, entering the Forth interpreter fails.
> 

Is it possible (even hackish) to ignore openbios an jump directly to the
kernel when using -kernel?

-- 
  .''`.  Aurelien Jarno	            | GPG: 1024D/F1BCDB73
 : :' :  Debian developer           | Electrical Engineer
 `. `'   aurel32@debian.org         | aurelien@aurel32.net
   `-    people.debian.org/~aurel32 | www.aurel32.net

Re: [Qemu-devel] Updated OpenBIOS images

[Peter]

On 4/16/07, Aurelien Jarno <aurelien@aurel32.net> wrote:
> Is it possible (even hackish) to ignore openbios an jump directly to the
> kernel when using -kernel?

No.  The kernel queries the BIOS for "hardware" configuration.

Re: [Qemu-devel] Updated OpenBIOS images

[Blue Swirl]

[-- Attachment #1: Type: text/plain, Size: 413 bytes --]

On 4/16/07, Aurelien Jarno <aurelien@aurel32.net> wrote:
> Blue Swirl a écrit :
> > The Sparc64 image can be booted using either VGA or serial. In both
> > cases, entering the Forth interpreter fails.
> >
>
> Is it possible (even hackish) to ignore openbios an jump directly to the
> kernel when using -kernel?

You can try this patch. It bypasses the Forth setup and jumps to a
hard coded kernel start address.

[-- Attachment #2: sparc64-kernel.diff --]
[-- Type: text/x-patch, Size: 665 bytes --]

Index: openbios-quilt/arch/sparc64/openbios.c
===================================================================
--- openbios-quilt.orig/arch/sparc64/openbios.c	2007-04-14 19:39:24.000000000 +0000
+++ openbios-quilt/arch/sparc64/openbios.c	2007-04-16 14:34:45.000000000 +0000
@@ -112,7 +112,13 @@
 #ifdef CONFIG_DEBUG_BOOT
 	printk("done\n");
 #endif
+        {
+            int (*entry)(const void *romvec, int p2, int p3, int p4, int p5);
 
+            printk("[sparc64] Kernel already loaded\n");
+            entry = (void *) 0x404000;
+            entry(0, 0, 0, 0, 0);
+        }
 	PUSH_xt( bind_noname_func(arch_init) );
 	fword("PREPOST-initializer");