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

2022-12-28 19:46:37 +02:00
parent 267367333e
commit 3c92aa45fb
3 changed files with 16 additions and 0 deletions
--- a/kernel/arch/i386/CPUID.cpp
+++ b/kernel/arch/i386/CPUID.cpp
@@ -46,4 +46,18 @@ namespace CPUID
 		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);
+	}
+
 }