created SD_CARD branch meant to experiment with SD-card routines in BaS_gcc

SD_CARD/BaS_gcc/sources/cache.c

@@ -0,0 +1,48 @@
+/*
+ * cache handling
+ *
+ * This file is part of BaS_gcc.
+ *
+ * BaS_gcc 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 3 of the License, or
+ * (at your option) any later version.
+ *
+ * BaS_gcc 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 BaS_gcc.  If not, see <http://www.gnu.org/licenses/>.
+ *
+ * Copyright 2010 - 2012 F. Aschwanden
+ * Copyright 2011 - 2012 V. Riviere
+ * Copyright 2012        M. Froeschle
+ *
+ */
+
+#include "cache.h"
+
+void flush_and_invalidate_caches(void)
+{
+	__asm__ (
+	"	clr.l		d0\n\t"
+	"	clr.l		d1\n\t"
+	"	move.l		d0,a0\n\t"
+	"cfa_setloop:\n\t"
+	"	cpushl		bc,(a0)				| flush\n\t"
+	"	lea			0x10(a0),a0			| index+1\n\t"
+	"	addq.l		#1,d1				| index+1\n\t"
+	"	cmpi.w		#512,d1				| all sets?\n\t"
+	"	bne.s		cfa_setloop			| no->\n\t"
+	"	clr.l		d1\n\t"
+	"	addq.l		#1,d0\n\t"
+	"	move.l		d0,a0\n\t"
+	"	cmpi.w		#4,d0				| all ways?\n\t"
+	"	bne.s		cfa_setloop			| no->\n\t"
+	/* input */	:
+	/* output */	:
+	/* clobber */	: "d0", "d1", "a0"
+	);
+}