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Kernel: Pull apart CPU.h
This does not add any functional changes
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86 changed files with 3866 additions and 3493 deletions
83
Kernel/Arch/x86/i386/ASM_wrapper.cpp
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83
Kernel/Arch/x86/i386/ASM_wrapper.cpp
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/*
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* Copyright (c) 2018-2021, Andreas Kling <kling@serenityos.org>
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*
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* SPDX-License-Identifier: BSD-2-Clause
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*/
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#include <AK/Types.h>
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#include <Kernel/Arch/x86/ASM_wrapper.h>
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#include <Kernel/Arch/x86/CPU.h>
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#include <Kernel/Arch/x86/Processor.h>
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namespace Kernel {
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UNMAP_AFTER_INIT void write_cr0(FlatPtr value)
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{
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asm volatile("mov %%eax, %%cr0" ::"a"(value));
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}
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UNMAP_AFTER_INIT void write_cr4(FlatPtr value)
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{
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asm volatile("mov %%eax, %%cr4" ::"a"(value));
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}
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FlatPtr read_cr0()
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{
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FlatPtr cr0;
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asm("mov %%cr0, %%eax"
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: "=a"(cr0));
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return cr0;
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}
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FlatPtr read_cr2()
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{
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FlatPtr cr2;
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asm("mov %%cr2, %%eax"
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: "=a"(cr2));
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return cr2;
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}
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FlatPtr read_cr3()
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{
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FlatPtr cr3;
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asm("mov %%cr3, %%eax"
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: "=a"(cr3));
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return cr3;
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}
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void write_cr3(FlatPtr cr3)
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{
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// NOTE: If you're here from a GPF crash, it's very likely that a PDPT entry is incorrect, not this!
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asm volatile("mov %%eax, %%cr3" ::"a"(cr3)
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: "memory");
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}
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FlatPtr read_cr4()
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{
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FlatPtr cr4;
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asm("mov %%cr4, %%eax"
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: "=a"(cr4));
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return cr4;
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}
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#define DEFINE_DEBUG_REGISTER(index) \
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FlatPtr read_dr##index() \
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{ \
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FlatPtr value; \
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asm("mov %%dr" #index ", %%eax" \
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: "=a"(value)); \
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return value; \
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} \
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void write_dr##index(FlatPtr value) \
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{ \
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asm volatile("mov %%eax, %%dr" #index ::"a"(value)); \
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}
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DEFINE_DEBUG_REGISTER(0);
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DEFINE_DEBUG_REGISTER(1);
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DEFINE_DEBUG_REGISTER(2);
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DEFINE_DEBUG_REGISTER(3);
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DEFINE_DEBUG_REGISTER(6);
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DEFINE_DEBUG_REGISTER(7);
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}
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