Architecture specific initialization prior to processor structures initialization

2023-01-30 20:34:05 +01:00
parent 6f068513cd
commit a761d3125a
8 changed files with 82 additions and 3 deletions
--- a/xtoskrnl/ke/amd64/krnlinit.c
+++ b/xtoskrnl/ke/amd64/krnlinit.c
@@ -20,6 +20,21 @@ XTAPI
 VOID
 KepArchInitialize(VOID)
 {
+    /* Enable global paging support */
+    ArWriteControlRegister(4, ArReadControlRegister(4) | CR4_PGE);
+
+    /* Enable write-protection */
+    ArWriteControlRegister(0, ArReadControlRegister(0) | CR0_WP);
+
+    /* Set alignment mask */
+    ArWriteControlRegister(0, ArReadControlRegister(0) | CR0_AM);
+
+    /* Re-enable IDE interrupts */
+    HlIoPortOutByte(0x376, 0);
+    HlIoPortOutByte(0x3F6, 0);
+
+    /* Set system call extensions (SCE) flag in EFER MSR */
+    ArWriteModelSpecificRegister(X86_MSR_EFER, ArReadModelSpecificRegister(X86_MSR_EFER) | X86_MSR_EFER_SCE);
 }

 /**