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Date: Wed, 28 Sep 2005 07:59:39 +0200
From: Martin Bochnig <mb1x@gmx.com>
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Subject: Re: [Qemu-devel] SPARC patch for OS X (big endian machines)
References: <8c2b58c5dbd7bef1e6dd8fa31c9f2d41@soe.ucsc.edu>
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To: qemu-devel@nongnu.org
Cc: renau@soe.ucsc.edu

Jose Renau wrote:

>
> Without the following patch, I was unable to "start" the Linux boot 
> process
> on OS X (powerPC bigendian). I tried on ia64 (Linux) and works fine too.



Pretty cool.
I can confirm this for SPARC hosts , too (also MSB).

Hey, be aware that the SPARConSPARC case finally works with your patch :)
Even in SDL/gui mode, not just with "-nographic".

Thank you!

>
> --- target-sparc/op_helper.c 23 Jul 2005 14:27:54 -0000 1.15
> +++ target-sparc/op_helper.c 27 Sep 2005 23:54:52 -0000
> @@ -225,4 +225,5 @@
> void helper_ld_asi(int asi, int size, int sign)
> {
> +
> uint32_t ret = 0;
>
> @@ -258,8 +259,12 @@
> case 0x20 ... 0x2f: /* MMU passthrough */
> cpu_physical_memory_read(T0, (void *) &ret, size);
> - if (size == 4)
> - tswap32s(&ret);
> - else if (size == 2)
> - tswap16s((uint16_t *)&ret);
> +
> + tswap32s(&ret);
> + if (size == 2) {
> + ret = ret >> 16;
> + }else if (size == 1) {
> + ret = ret >> 24;
> + }
> +
> break;
> default: