Siyuan Wang (wangsiyuanbuaa@gmail.com) just uploaded a new patch set to gerrit, which you can find at http://review.coreboot.org/1659
-gerrit
commit 24b8b4b3468f3f7782f4415772659d254c2a14f0 Author: Siyuan Wang wangsiyuanbuaa@gmail.com Date: Wed Oct 31 15:39:51 2012 +0800
AMD G34 CPU: change lapic_id in northbridge.c to accommodate G34 CPU
Each G34 socket has two node. Previous lapic algorithm is written for the CPU which has one node per socket. I test the code on h8qgi with 4 family 15 CPUs(8 cores per CPU). The topology is: socket 0 --> Node 0, Node 1 socket 2 --> Node 2, Node 3 socket 1 --> Node 4, Node 5 socket 3 --> Node 6, Node 7 Each node has 4 cores. I change the code according to this topology.
Change-Id: I45f242e0dfc61bd9b18afc952d7a0ad6a0fc3855 Signed-off-by: Siyuan Wang SiYuan.Wang@amd.com Signed-off-by: Siyuan Wang wangsiyuanbuaa@gmail.com --- src/northbridge/amd/agesa/family15/northbridge.c | 6 +++++- 1 file changed, 5 insertions(+), 1 deletion(-)
diff --git a/src/northbridge/amd/agesa/family15/northbridge.c b/src/northbridge/amd/agesa/family15/northbridge.c index 12a211f..78986e4 100644 --- a/src/northbridge/amd/agesa/family15/northbridge.c +++ b/src/northbridge/amd/agesa/family15/northbridge.c @@ -1068,7 +1068,11 @@ static u32 cpu_bus_scan(device_t dev, u32 max) lapicid_start = (lapicid_start + 1) * core_max; printk(BIOS_SPEW, "lpaicid_start=0x%x ", lapicid_start); } - u32 apic_id = (i * core_max) + j + lapicid_start; +#if CONFIG_CPU_AMD_SOCKET_G34 + u32 apic_id = (i / 2 * core_max) + j + lapicid_start + (i % 2 ? siblings + 1 : 0); +#else + u32 apic_id = (i * core_max) + j + lapicid_start; +#endif printk(BIOS_SPEW, "node 0x%x core 0x%x apicid=0x%x\n", i, j, apic_id);