From 5e0b8d508ed51004bd836384293be00950ee62c9 Mon Sep 17 00:00:00 2001
From: Pasha <pasha@member.fsf.org>
Date: Tue, 20 Feb 2024 18:49:50 +0000
Subject: init gnumach copy

---
 i386/i386at/int_init.c | 82 ++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 82 insertions(+)
 create mode 100644 i386/i386at/int_init.c

(limited to 'i386/i386at/int_init.c')

diff --git a/i386/i386at/int_init.c b/i386/i386at/int_init.c
new file mode 100644
index 0000000..5c8fce6
--- /dev/null
+++ b/i386/i386at/int_init.c
@@ -0,0 +1,82 @@
+/* 
+ * Copyright (c) 1994 The University of Utah and
+ * the Computer Systems Laboratory at the University of Utah (CSL).
+ * All rights reserved.
+ *
+ * Permission to use, copy, modify and distribute this software is hereby
+ * granted provided that (1) source code retains these copyright, permission,
+ * and disclaimer notices, and (2) redistributions including binaries
+ * reproduce the notices in supporting documentation, and (3) all advertising
+ * materials mentioning features or use of this software display the following
+ * acknowledgement: ``This product includes software developed by the
+ * Computer Systems Laboratory at the University of Utah.''
+ *
+ * THE UNIVERSITY OF UTAH AND CSL ALLOW FREE USE OF THIS SOFTWARE IN ITS "AS
+ * IS" CONDITION.  THE UNIVERSITY OF UTAH AND CSL DISCLAIM ANY LIABILITY OF
+ * ANY KIND FOR ANY DAMAGES WHATSOEVER RESULTING FROM THE USE OF THIS SOFTWARE.
+ *
+ * CSL requests users of this software to return to csl-dist@cs.utah.edu any
+ * improvements that they make and grant CSL redistribution rights.
+ *
+ *      Author: Bryan Ford, University of Utah CSL
+ */
+
+#include <i386at/idt.h>
+#include <i386at/int_init.h>
+#include <i386/gdt.h>
+#include <i386/mp_desc.h>
+#include <kern/printf.h>
+#ifdef APIC
+#include <i386/apic.h>
+#endif
+
+/* defined in locore.S */
+extern vm_offset_t int_entry_table[];
+
+static void
+int_fill(struct real_gate *myidt)
+{
+	int i;
+#ifndef APIC
+	int base = PIC_INT_BASE;
+	int nirq = 16;
+#else
+	int base = IOAPIC_INT_BASE;
+	int nirq = NINTR;
+#endif
+
+	for (i = 0; i < nirq; i++) {
+		fill_idt_gate(myidt, base + i,
+			      int_entry_table[i], KERNEL_CS,
+			      ACC_PL_K|ACC_INTR_GATE, 0);
+	}
+#if NCPUS > 1
+	fill_idt_gate(myidt, CALL_AST_CHECK,
+			      int_entry_table[i], KERNEL_CS,
+			      ACC_PL_K|ACC_INTR_GATE, 0);
+	i++;
+	fill_idt_gate(myidt, CALL_PMAP_UPDATE,
+			      int_entry_table[i], KERNEL_CS,
+			      ACC_PL_K|ACC_INTR_GATE, 0);
+	i++;
+#endif
+#ifdef APIC
+	fill_idt_gate(myidt, IOAPIC_SPURIOUS_BASE,
+			      int_entry_table[i], KERNEL_CS,
+			      ACC_PL_K|ACC_INTR_GATE, 0);
+	i++;
+#endif
+}
+
+void
+int_init(void)
+{
+	int_fill(idt);
+}
+
+#if NCPUS > 1
+void ap_int_init(int cpu)
+{
+	int_fill(mp_desc_table[cpu]->idt);
+}
+#endif
-- 
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