This patch should get all 7447a cpus working with openbios, needs a corresponding patch to Qemu-ppc for the v1.5
diff --git a/arch/ppc/qemu/init.c b/arch/ppc/qemu/init.c index 5ce080c..09b2db4 100644 --- a/arch/ppc/qemu/init.c +++ b/arch/ppc/qemu/init.c @@ -550,6 +550,18 @@ static const struct cpudef ppc_defs[] = { .tlb_size = 0x80, .initfn = cpu_g4_init, }, + .iu_version = 0x80030000, + .name = "PowerPC,G4", + .icache_size = 0x8000, + .dcache_size = 0x8000, + .icache_sets = 0x80, + .dcache_sets = 0x80, + .icache_block_size = 0x20, + .dcache_block_size = 0x20, + .tlb_sets = 0x40, + .tlb_size = 0x80, + .initfn = cpu_g4_init, +}, { .iu_version = 0x00390000, .name = "PowerPC,970",