139 lines
3.7 KiB
C++
139 lines
3.7 KiB
C++
/////////////////////////////////////////////////////////////////////////
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// $Id$
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/////////////////////////////////////////////////////////////////////////
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//
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// Copyright (c) 2014 Stanislav Shwartsman
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// Written by Stanislav Shwartsman [sshwarts at sourceforge net]
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//
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// This library is free software; you can redistribute it and/or
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// modify it under the terms of the GNU Lesser General Public
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// License as published by the Free Software Foundation; either
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// version 2 of the License, or (at your option) any later version.
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//
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// This library is distributed in the hope that it will be useful,
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// but WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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// Lesser General Public License for more details.
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//
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// You should have received a copy of the GNU Lesser General Public
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// License along with this library; if not, write to the Free Software
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// Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA B 02110-1301 USA
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//
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/////////////////////////////////////////////////////////////////////////
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#include "bochs.h"
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#include "cpu.h"
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#include "param_names.h"
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#include "cpuid.h"
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#define LOG_THIS cpu->
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bx_cpuid_t::bx_cpuid_t(BX_CPU_C *_cpu): cpu(_cpu)
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{
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#if BX_SUPPORT_SMP
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nthreads = SIM->get_param_num(BXPN_CPU_NTHREADS)->get();
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ncores = SIM->get_param_num(BXPN_CPU_NCORES)->get();
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nprocessors = SIM->get_param_num(BXPN_CPU_NPROCESSORS)->get();
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#else
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nthreads = 1;
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ncores = 1;
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nprocessors = 1;
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#endif
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for (unsigned n=0; n < BX_ISA_EXTENSIONS_ARRAY_SIZE; n++)
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ia_extensions_bitmask[n] = 0;
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}
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BX_CPP_INLINE static Bit32u ilog2(Bit32u x)
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{
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Bit32u count = 0;
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while(x>>=1) count++;
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return count;
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}
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// leaf 0x0000000B //
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void bx_cpuid_t::get_std_cpuid_extended_topology_leaf(Bit32u subfunction, cpuid_function_t *leaf) const
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{
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// CPUID function 0x0000000B - Extended Topology Leaf
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leaf->eax = 0;
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leaf->ebx = 0;
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leaf->ecx = subfunction;
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leaf->edx = cpu->get_apic_id();
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#if BX_SUPPORT_SMP
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switch(subfunction) {
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case 0:
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if (nthreads > 1) {
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leaf->eax = ilog2(nthreads-1)+1;
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leaf->ebx = nthreads;
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leaf->ecx |= (1<<8);
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}
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else if (ncores > 1) {
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leaf->eax = ilog2(ncores-1)+1;
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leaf->ebx = ncores;
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leaf->ecx |= (2<<8);
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}
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else if (nprocessors > 1) {
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leaf->eax = ilog2(nprocessors-1)+1;
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leaf->ebx = nprocessors;
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}
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else {
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leaf->eax = 1;
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leaf->ebx = 1; // number of logical CPUs at this level
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}
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break;
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case 1:
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if (nthreads > 1) {
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if (ncores > 1) {
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leaf->eax = ilog2(ncores-1)+1;
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leaf->ebx = ncores;
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leaf->ecx |= (2<<8);
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}
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else if (nprocessors > 1) {
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leaf->eax = ilog2(nprocessors-1)+1;
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leaf->ebx = nprocessors;
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}
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}
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else if (ncores > 1) {
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if (nprocessors > 1) {
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leaf->eax = ilog2(nprocessors-1)+1;
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leaf->ebx = nprocessors;
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}
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}
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break;
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case 2:
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if (nthreads > 1) {
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if (nprocessors > 1) {
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leaf->eax = ilog2(nprocessors-1)+1;
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leaf->ebx = nprocessors;
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}
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}
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break;
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default:
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break;
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}
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#endif
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}
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void bx_cpuid_t::dump_cpuid(unsigned max_std_leaf, unsigned max_ext_leaf) const
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{
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struct cpuid_function_t leaf;
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unsigned n;
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for (n=0; n<=max_std_leaf; n++) {
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get_cpuid_leaf(n, 0x00000000, &leaf);
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BX_INFO(("CPUID[0x%08x]: %08x %08x %08x %08x", n, leaf.eax, leaf.ebx, leaf.ecx, leaf.edx));
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}
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if (max_ext_leaf == 0) return;
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for (n=0x80000000; n<=(0x8000000 + max_ext_leaf); n++) {
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get_cpuid_leaf(n, 0x00000000, &leaf);
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BX_INFO(("CPUID[0x%08x]: %08x %08x %08x %08x", n, leaf.eax, leaf.ebx, leaf.ecx, leaf.edx));
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}
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}
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