Initial import for store (USB experimental project for mass storage)

usb/store/host/aranym/natfeat_asm.S

@@ -0,0 +1,76 @@
+/*
+ * ARAnyM native features interface.
+ * (c) 2005-2008 ARAnyM development team
+ *
+ * In 2006 updated with FreeMiNT headers and code.
+ * In 2008 converted from "__NF" cookie to direct usage of NF instructions
+ *
+ **/
+
+/*
+ * Copied from FreeMiNT source tree where Native Features were added recently
+ *
+ * Copyright 2003 Frank Naumann <fnaumann@freemint.de>
+ * All rights reserved.
+ * 
+ * This file 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, or (at your option)
+ * any later version.
+ * 
+ * This file 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 this program; if not, write to the Free Software
+ * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
+ * 
+ * 
+ * Author: Frank Naumann <fnaumann@freemint.de>
+ * Started: 2003-12-13
+ * 
+ * please send suggestions, patches or bug reports to me or
+ * the MiNT mailing list
+ * 
+ */
+
+#define ARANYM 1
+# ifdef ARANYM
+
+	.text
+
+	.globl	_detect_native_features
+
+/* 
+ * NatFeats test (routine retuns TRUE/FALSE (1/0) in D0)
+ */
+_detect_native_features:
+
+	clr.l	d0			// assume no NatFeats available
+	move.l	sp,a1			// save the ssp
+	move.l	(0x0010).w,a0		// illegal instruction vector
+	move.l	#fail_natfeat,(0x0010).w
+
+	nop				// flush pipelines (for 68040+)
+
+	pea	(nf_version_name).w(pc)
+	subq.l	#4,sp
+	dc.w	0x7300			// Jump to NATFEAT_ID
+	tst.l	d0
+	beq.s	fail_natfeat
+	moveq	#1,d0			// NatFeats detected
+
+fail_natfeat:
+	move.l	a1,sp
+	move.l	a0,(0x0010).w
+
+	nop				// flush pipelines (for 68040+)
+
+	rts
+
+nf_version_name:
+	.ascii	"NF_VERSION\0"
+
+# endif