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Kernel: 'cpuinfo' command in shell now shows wheter you are running on 64-bit cpu

This commit is contained in:
Bananymous 2022-12-28 19:46:37 +02:00
parent 267367333e
commit 3c92aa45fb
3 changed files with 16 additions and 0 deletions
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14
kernel/arch/i386/CPUID.cpp
View File

@ -46,4 +46,18 @@ namespace CPUID
edx = buffer[3]; edx = buffer[3];
} }
bool Is64Bit()
{
if (!IsAvailable())
return false;
uint32_t buffer[4] {};
get_cpuid(0x80000000, buffer);
if (buffer[0] < 0x80000001)
return false;
get_cpuid(0x80000001, buffer);
return buffer[3] & (1 << 29);
}
} }

1
kernel/include/kernel/CPUID.h
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@ -151,5 +151,6 @@ namespace CPUID
bool IsAvailable(); bool IsAvailable();
const char* GetVendor(); const char* GetVendor();
void GetFeatures(uint32_t& ecx, uint32_t& edx); void GetFeatures(uint32_t& ecx, uint32_t& edx);
bool Is64Bit();
} }

1
kernel/kernel/Shell.cpp
View File

@ -120,6 +120,7 @@ namespace Kernel
CPUID::GetFeatures(ecx, edx); CPUID::GetFeatures(ecx, edx);
TTY_PRINTLN("Vendor: '{}'", vendor); TTY_PRINTLN("Vendor: '{}'", vendor);
TTY_PRINTLN("64-bit: {}", CPUID::Is64Bit());
bool first = true; bool first = true;
for (int i = 0; i < 32; i++) for (int i = 0; i < 32; i++)
if (ecx & ((uint32_t)1 << i)) if (ecx & ((uint32_t)1 << i))