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

---
 xen/xen.c | 73 +++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 73 insertions(+)
 create mode 100644 xen/xen.c

(limited to 'xen/xen.c')

diff --git a/xen/xen.c b/xen/xen.c
new file mode 100644
index 0000000..6d42447
--- /dev/null
+++ b/xen/xen.c
@@ -0,0 +1,73 @@
+/*
+ *  Copyright (C) 2007-2011 Free Software Foundation
+ *
+ * This program is free software ; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation ; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY ; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with the program ; if not, write to the Free Software
+ * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
+ */
+
+#include <sys/types.h>
+#include <string.h>
+#include <mach/xen.h>
+#include <machine/xen.h>
+#include <machine/ipl.h>
+#include <xen/block.h>
+#include <xen/console.h>
+#include <xen/grant.h>
+#include <xen/net.h>
+#include <xen/store.h>
+#include <xen/time.h>
+#include "xen.h"
+#include "evt.h"
+
+static void hyp_debug(void)
+{
+	panic("debug");
+}
+
+void hyp_init(void)
+{ 
+        hyp_grant_init(); 
+        hyp_store_init(); 
+	evtchn_port_t port = hyp_event_channel_bind_virq(VIRQ_DEBUG, 0);
+	hyp_evt_handler(port, (interrupt_handler_fn)hyp_debug, 0, SPL7);
+} 
+
+void hyp_dev_init(void)
+{
+	/* these depend on hyp_init() and working threads */
+	hyp_block_init(); 
+	hyp_net_init(); 
+}
+
+extern int int_mask[];
+void hyp_idle(void)
+{
+	int cpu = 0;
+	hyp_shared_info.vcpu_info[cpu].evtchn_upcall_mask = 0xff;
+	barrier();
+	/* Avoid blocking if there are pending events */
+	if (!hyp_shared_info.vcpu_info[cpu].evtchn_upcall_pending &&
+		!hyp_shared_info.evtchn_pending[cpu])
+		hyp_block();
+	while (1) {
+		hyp_shared_info.vcpu_info[cpu].evtchn_upcall_mask = 0x00;
+		barrier();
+		if (!hyp_shared_info.vcpu_info[cpu].evtchn_upcall_pending &&
+			!hyp_shared_info.evtchn_pending[cpu])
+			/* Didn't miss any event, can return to threads.  */
+			break;
+		hyp_shared_info.vcpu_info[cpu].evtchn_upcall_mask = 0xff;
+		hyp_c_callback(NULL,NULL);
+	}
+}
-- 
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