1 /* 2004.12 yhlu add dual core support */
4 #include <cpu/amd/multicore.h>
6 #include <cpu/amd/model_fxx_msr.h>
9 //called by bus_cpu_scan too
10 unsigned int read_nb_cfg_54(void)
13 msr = rdmsr(NB_CFG_MSR);
14 return ( ( msr.hi >> (54-32)) & 1);
17 static inline unsigned get_initial_apicid(void)
19 return ((cpuid_ebx(1) >> 24) & 0xf);
22 //called by amd_siblings too
25 struct node_core_id get_node_core_id(unsigned nb_cfg_54)
27 struct node_core_id id;
28 // get the apicid via cpuid(1) ebx[27:24]
30 // when NB_CFG[54] is set, nodeid = ebx[27:25], coreid = ebx[24]
31 id.coreid = (cpuid_ebx(1) >> 24) & 0xf;
32 id.nodeid = (id.coreid>>CORE_ID_BIT);
33 id.coreid &= ((1<<CORE_ID_BIT)-1);
37 // when NB_CFG[54] is clear, nodeid = ebx[26:24], coreid = ebx[27]
38 id.nodeid = (cpuid_ebx(1) >> 24) & 0xf;
39 id.coreid = (id.nodeid>>NODE_ID_BIT);
40 id.nodeid &= ((1<<NODE_ID_BIT)-1);
45 static inline unsigned get_core_num(void)
47 return (cpuid_ecx(0x80000008) & 0xff);
50 static inline struct node_core_id get_node_core_id_x(void)
53 return get_node_core_id(read_nb_cfg_54()); // for pre_e0() nb_cfg_54 always be 0