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/*
* This file is part of the coreboot project.
*
* Copyright (C) 2004 Yinghai Lu
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; version 2 of the License.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*/
#include <arch/cpu.h>
#include <cpu/amd/multicore.h>
#ifdef __PRE_RAM__
#include <cpu/amd/msr.h>
#endif
//called by bus_cpu_scan too
unsigned int read_nb_cfg_54(void)
{
msr_t msr;
msr = rdmsr(NB_CFG_MSR);
return ( ( msr.hi >> (54-32)) & 1);
}
u32 get_initial_apicid(void)
{
return ((cpuid_ebx(1) >> 24) & 0xf);
}
//called by amd_siblings too
#define CORE_ID_BIT 1
#define NODE_ID_BIT 3
struct node_core_id get_node_core_id(unsigned nb_cfg_54)
{
struct node_core_id id;
// get the apicid via cpuid(1) ebx[27:24]
if ( nb_cfg_54) {
// when NB_CFG[54] is set, nodeid = ebx[27:25], coreid = ebx[24]
id.coreid = (cpuid_ebx(1) >> 24) & 0xf;
id.nodeid = (id.coreid>>CORE_ID_BIT);
id.coreid &= ((1<<CORE_ID_BIT)-1);
}
else
{
// when NB_CFG[54] is clear, nodeid = ebx[26:24], coreid = ebx[27]
id.nodeid = (cpuid_ebx(1) >> 24) & 0xf;
id.coreid = (id.nodeid>>NODE_ID_BIT);
id.nodeid &= ((1<<NODE_ID_BIT)-1);
}
return id;
}
static inline unsigned get_core_num(void)
{
return (cpuid_ecx(0x80000008) & 0xff);
}
struct node_core_id get_node_core_id_x(void)
{
return get_node_core_id(read_nb_cfg_54()); // for pre_e0() nb_cfg_54 always be 0
}
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