On 19/01/18 12:26, Jd Lyons via OpenBIOS wrote:
As an addition to my post at qemu-ppc, I’d like to add support for a few more cpus to Openbios, so when I get KVM to support -cpu host: openbios will be able to boot from the cpu’s I have.
Right now I have a Powerbook6,8 with a 7447a ( PRV 80030105 ) I think this CPU is V1.5.
I also have a iBook with a 750fx ( PVR 70000112 ).
Soon I will have a Quicksilver with Dual 1Ghz G4’s, and an iBook G4 with a 7447a, not sure of the PVR’s yet.
So, I see that I need to edit the init.c, and I noticed we might need some real values from some of the chips.
{ // XXX find out real values .iu_version = 0x800c0000, .name = "PowerPC,74xx", .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_750_init,
Mark, how can I get the values needed from my CPU’s?
I’m assuming we need the values for the .icach_size etc.
On a real Mac you can see them in the CPU node in the Open Firmware device tree. This is how it looks in OpenBIOS (should be fairly easy to do the equivalent on a real Mac):
0 > dev /cpus ok 0 > ls fff5ba80 PowerPC,750@0 ok 0 > dev PowerPC,750 ok 0 > .properties name "PowerPC,750" device_type "cpu" cpu-version 80301 d-cache-size 8000 i-cache-size 8000 d-cache-sets 80 i-cache-sets 80 d-cache-block-size 20 i-cache-block-size 20 tlb-sets 40 tlb-size 80 timebase-frequency fd4bc0 clock-frequency fdad680 bus-frequency 3ef1480 state "running" reservation-granule-size 20 reg 00000000 available 00004000 07c54000 07e10000 781f0000 translations 00001000 00003000 00001000 00000000 07c58000 001b8000 07c58000 00000000 fff00000 00100000 07f00000 00000000 ok
ATB,
Mark.