Kernel: Add CPUID check for 1 GiB page support

2024-10-14 11:38:03 +03:00
parent 2b43569927
commit 5f63ea8f8a
2 changed files with 11 additions and 0 deletions
--- a/kernel/kernel/CPUID.cpp
+++ b/kernel/kernel/CPUID.cpp
@@ -64,6 +64,16 @@ namespace CPUID
 		return edx & CPUID::EDX_PAT;
 	}

+	bool has_1gib_pages()
+	{
+		uint32_t buffer[4] {};
+		get_cpuid(0x80000000, buffer);
+		if (buffer[0] < 0x80000001)
+			return false;
+		get_cpuid(0x80000001, buffer);
+		return buffer[3] & (1 << 26);
+	}
+
 	const char* feature_string_ecx(uint32_t feat)
 	{
 		switch (feat)