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Kernel: List all CPUs in /proc/cpuinfo
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12 changed files with 229 additions and 64 deletions
95
Kernel/Arch/i386/ProcessorInfo.cpp
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95
Kernel/Arch/i386/ProcessorInfo.cpp
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/*
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* Copyright (c) 2018-2020, Andreas Kling <kling@serenityos.org>
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions are met:
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*
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* 1. Redistributions of source code must retain the above copyright notice, this
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* list of conditions and the following disclaimer.
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*
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* 2. Redistributions in binary form must reproduce the above copyright notice,
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* this list of conditions and the following disclaimer in the documentation
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* and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
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* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
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* DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
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* SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
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* CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
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* OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#include <AK/Assertions.h>
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#include <AK/HashMap.h>
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#include <AK/String.h>
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#include <AK/StringBuilder.h>
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#include <AK/Types.h>
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#include <Kernel/Arch/i386/CPU.h>
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#include <Kernel/Arch/i386/ProcessorInfo.h>
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namespace Kernel {
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ProcessorInfo::ProcessorInfo(Processor& processor):
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m_processor(processor)
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{
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{
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CPUID cpuid(0);
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StringBuilder builder;
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auto emit_u32 = [&](u32 value) {
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builder.appendf("%c%c%c%c",
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value & 0xff,
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(value >> 8) & 0xff,
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(value >> 16) & 0xff,
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(value >> 24) & 0xff);
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};
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emit_u32(cpuid.ebx());
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emit_u32(cpuid.edx());
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emit_u32(cpuid.ecx());
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m_cpuid = builder.build();
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}
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{
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CPUID cpuid(1);
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m_stepping = cpuid.eax() & 0xf;
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u32 model = (cpuid.eax() >> 4) & 0xf;
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u32 family = (cpuid.eax() >> 8) & 0xf;
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m_type = (cpuid.eax() >> 12) & 0x3;
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u32 extended_model = (cpuid.eax() >> 16) & 0xf;
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u32 extended_family = (cpuid.eax() >> 20) & 0xff;
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if (family == 15) {
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m_display_family = family + extended_family;
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m_display_model = model + (extended_model << 4);
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} else if (family == 6) {
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m_display_family = family;
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m_display_model = model + (extended_model << 4);
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} else {
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m_display_family = family;
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m_display_model = model;
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}
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}
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{
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// FIXME: Check first that this is supported by calling CPUID with eax=0x80000000
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// and verifying that the returned eax>=0x80000004.
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alignas(u32) char buffer[48];
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u32* bufptr = reinterpret_cast<u32*>(buffer);
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auto copy_brand_string_part_to_buffer = [&](u32 i) {
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CPUID cpuid(0x80000002 + i);
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*bufptr++ = cpuid.eax();
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*bufptr++ = cpuid.ebx();
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*bufptr++ = cpuid.ecx();
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*bufptr++ = cpuid.edx();
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};
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copy_brand_string_part_to_buffer(0);
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copy_brand_string_part_to_buffer(1);
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copy_brand_string_part_to_buffer(2);
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m_brandstr = buffer;
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}
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}
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}
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#include <AK/String.h>
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