Kernel: Implement 'cpuid' and enumerations for features

This commit is contained in:
Bananymous 2022-12-15 17:28:54 +02:00
parent 9fa3d891e9
commit a2d38af37a
3 changed files with 205 additions and 0 deletions

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@ -0,0 +1,49 @@
#include <kernel/CPUID.h>
namespace CPUID
{
void get_cpuid(uint32_t code, uint32_t* out)
{
asm volatile("cpuid" : "=a"(out[0]), "=b"(out[1]), "=c"(out[2]), "=d"(out[3]) : "a"(code));
}
void get_cpuid_string(uint32_t code, uint32_t* out)
{
asm volatile ("cpuid": "=a"(out[0]), "=b"(out[0]), "=d"(out[1]), "=c"(out[2]) : "a"(code));
}
bool IsAvailable()
{
uint32_t res;
asm volatile(
"pushfl;"
"pushfl;"
"popl %0;"
"xorl %1, %0;"
"pushl %0;"
"popfl;"
"pushfl;"
"popl %0;"
"popfl;"
: "=r"(res)
: "i" (0x00200000));
return res != 0;
}
const char* GetVendor()
{
static char vendor[13] {};
get_cpuid_string(0x00, (uint32_t*)vendor);
vendor[12] = '\0';
return vendor;
}
void GetFeatures(uint32_t& ecx, uint32_t& edx)
{
uint32_t buffer[4] {};
get_cpuid(0x01, buffer);
ecx = buffer[2];
edx = buffer[3];
}
}

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@ -6,6 +6,7 @@ KERNEL_ARCH_LIBS=
KERNEL_ARCH_OBJS=\ KERNEL_ARCH_OBJS=\
$(ARCHDIR)/boot.o \ $(ARCHDIR)/boot.o \
$(ARCHDIR)/tty.o \ $(ARCHDIR)/tty.o \
$(ARCHDIR)/CPUID.o \
$(ARCHDIR)/GDT.o \ $(ARCHDIR)/GDT.o \
$(ARCHDIR)/GDT_asm.o \ $(ARCHDIR)/GDT_asm.o \
$(ARCHDIR)/IDT.o \ $(ARCHDIR)/IDT.o \

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@ -0,0 +1,155 @@
#pragma once
#include <stdint.h>
namespace CPUID
{
enum Features : uint32_t
{
ECX_SSE3 = (uint32_t)1 << 0,
ECX_PCLMULQDQ = (uint32_t)1 << 1,
ECX_DTES64 = (uint32_t)1 << 2,
ECX_MONITOR = (uint32_t)1 << 3,
ECX_DS_CPL = (uint32_t)1 << 4,
ECX_VMX = (uint32_t)1 << 5,
ECX_SMX = (uint32_t)1 << 6,
ECX_EST = (uint32_t)1 << 7,
ECX_TM2 = (uint32_t)1 << 8,
ECX_SSSE3 = (uint32_t)1 << 9,
ECX_CNTX_ID = (uint32_t)1 << 10,
ECX_SDBG = (uint32_t)1 << 11,
ECX_FMA = (uint32_t)1 << 12,
ECX_CX16 = (uint32_t)1 << 13,
ECX_XTPR = (uint32_t)1 << 14,
ECX_PDCM = (uint32_t)1 << 15,
ECX_PCID = (uint32_t)1 << 17,
ECX_DCA = (uint32_t)1 << 18,
ECX_SSE4_1 = (uint32_t)1 << 19,
ECX_SSE4_2 = (uint32_t)1 << 20,
ECX_X2APIC = (uint32_t)1 << 21,
ECX_MOVBE = (uint32_t)1 << 22,
ECX_POPCNT = (uint32_t)1 << 23,
ECX_TSC_DEADLINE = (uint32_t)1 << 24,
ECX_AES = (uint32_t)1 << 25,
ECX_XSAVE = (uint32_t)1 << 26,
ECX_OSXSAVE = (uint32_t)1 << 27,
ECX_AVX = (uint32_t)1 << 28,
ECX_F16C = (uint32_t)1 << 29,
ECX_RDRND = (uint32_t)1 << 30,
ECX_HYPERVISOR = (uint32_t)1 << 31,
EDX_FPU = (uint32_t)1 << 0,
EDX_VME = (uint32_t)1 << 1,
EDX_DE = (uint32_t)1 << 2,
EDX_PSE = (uint32_t)1 << 3,
EDX_TSC = (uint32_t)1 << 4,
EDX_MSR = (uint32_t)1 << 5,
EDX_PAE = (uint32_t)1 << 6,
EDX_MCE = (uint32_t)1 << 7,
EDX_CX8 = (uint32_t)1 << 8,
EDX_APIC = (uint32_t)1 << 9,
EDX_SEP = (uint32_t)1 << 11,
EDX_MTRR = (uint32_t)1 << 12,
EDX_PGE = (uint32_t)1 << 13,
EDX_MCA = (uint32_t)1 << 14,
EDX_CMOV = (uint32_t)1 << 15,
EDX_PAT = (uint32_t)1 << 16,
EDX_PSE36 = (uint32_t)1 << 17,
EDX_PSN = (uint32_t)1 << 18,
EDX_CLFSH = (uint32_t)1 << 19,
EDX_DS = (uint32_t)1 << 21,
EDX_ACPI = (uint32_t)1 << 22,
EDX_MMX = (uint32_t)1 << 23,
EDX_FXSR = (uint32_t)1 << 24,
EDX_SSE = (uint32_t)1 << 25,
EDX_SSE2 = (uint32_t)1 << 26,
EDX_SS = (uint32_t)1 << 27,
EDX_HTT = (uint32_t)1 << 28,
EDX_TM = (uint32_t)1 << 29,
EDX_IA64 = (uint32_t)1 << 30,
EDX_PBE = (uint32_t)1 << 31,
};
static const char* FeatStringECX(uint32_t feat)
{
switch (feat)
{
case Features::ECX_SSE3: return "ECX_SSE3";
case Features::ECX_PCLMULQDQ: return "ECX_PCLMULQDQ";
case Features::ECX_DTES64: return "ECX_DTES64";
case Features::ECX_MONITOR: return "ECX_MONITOR";
case Features::ECX_DS_CPL: return "ECX_DS_CPL";
case Features::ECX_VMX: return "ECX_VMX";
case Features::ECX_SMX: return "ECX_SMX";
case Features::ECX_EST: return "ECX_EST";
case Features::ECX_TM2: return "ECX_TM2";
case Features::ECX_SSSE3: return "ECX_SSSE3";
case Features::ECX_CNTX_ID: return "ECX_CNTX_ID";
case Features::ECX_SDBG: return "ECX_SDBG";
case Features::ECX_FMA: return "ECX_FMA";
case Features::ECX_CX16: return "ECX_CX16";
case Features::ECX_XTPR: return "ECX_XTPR";
case Features::ECX_PDCM: return "ECX_PDCM";
case Features::ECX_PCID: return "ECX_PCID";
case Features::ECX_DCA: return "ECX_DCA";
case Features::ECX_SSE4_1: return "ECX_SSE4_1";
case Features::ECX_SSE4_2: return "ECX_SSE4_2";
case Features::ECX_X2APIC: return "ECX_X2APIC";
case Features::ECX_MOVBE: return "ECX_MOVBE";
case Features::ECX_POPCNT: return "ECX_POPCNT";
case Features::ECX_TSC_DEADLINE: return "ECX_TSC_DEADLINE";
case Features::ECX_AES: return "ECX_AES";
case Features::ECX_XSAVE: return "ECX_XSAVE";
case Features::ECX_OSXSAVE: return "ECX_OSXSAVE";
case Features::ECX_AVX: return "ECX_AVX";
case Features::ECX_F16C: return "ECX_F16C";
case Features::ECX_RDRND: return "ECX_RDRND";
case Features::ECX_HYPERVISOR: return "ECX_HYPERVISOR";
default: return "UNKNOWN";
}
}
static const char* FeatStringEDX(uint32_t feat)
{
switch (feat)
{
case Features::EDX_FPU: return "EDX_FPU";
case Features::EDX_VME: return "EDX_VME";
case Features::EDX_DE: return "EDX_DE";
case Features::EDX_PSE: return "EDX_PSE";
case Features::EDX_TSC: return "EDX_TSC";
case Features::EDX_MSR: return "EDX_MSR";
case Features::EDX_PAE: return "EDX_PAE";
case Features::EDX_MCE: return "EDX_MCE";
case Features::EDX_CX8: return "EDX_CX8";
case Features::EDX_APIC: return "EDX_APIC";
case Features::EDX_SEP: return "EDX_SEP";
case Features::EDX_MTRR: return "EDX_MTRR";
case Features::EDX_PGE: return "EDX_PGE";
case Features::EDX_MCA: return "EDX_MCA";
case Features::EDX_CMOV: return "EDX_CMOV";
case Features::EDX_PAT: return "EDX_PAT";
case Features::EDX_PSE36: return "EDX_PSE36";
case Features::EDX_PSN: return "EDX_PSN";
case Features::EDX_CLFSH: return "EDX_CLFSH";
case Features::EDX_DS: return "EDX_DS";
case Features::EDX_ACPI: return "EDX_ACPI";
case Features::EDX_MMX: return "EDX_MMX";
case Features::EDX_FXSR: return "EDX_FXSR";
case Features::EDX_SSE: return "EDX_SSE";
case Features::EDX_SSE2: return "EDX_SSE2";
case Features::EDX_SS: return "EDX_SS";
case Features::EDX_HTT: return "EDX_HTT";
case Features::EDX_TM: return "EDX_TM";
case Features::EDX_IA64: return "EDX_IA64";
case Features::EDX_PBE: return "EDX_PBE";
default: return "NONE";
}
}
bool IsAvailable();
const char* GetVendor();
void GetFeatures(uint32_t& ecx, uint32_t& edx);
}