Create new branch for PCI development

pci_BaS_gcc/include/exceptions.h

@@ -0,0 +1,28 @@
+#ifndef _EXCEPTIONS_H_
+#define _EXCEPTIONS_H_
+
+#include <stdint.h>
+
+static inline uint32_t set_ipl(uint32_t ipl)
+{
+	uint32_t ret;
+
+	__asm__ __volatile__(
+		"		move.w	sr,%[ret]\r\n"			/* retrieve status register */
+		"		andi.l	#0x07,%[ipl]\n\t"		/* mask out ipl bits on new value */
+		"		lsl.l	#8,%[ipl]\n\t"			/* shift them to position */
+		"		move.l	%[ret],d0\n\t"			/* retrieve original value */
+		"		andi.l	#0x0000f8ff,d0\n\t"		/* clear ipl part */
+		"		or.l	%[ipl],d0\n\t"			/* or in new value */
+		"		move.w	d0,sr\n\t"				/* put it in place */
+		"		andi.l	#0x0700,%[ret]\r\n"		/* mask out ipl bits */
+		"		lsr.l	#8,%[ret]\r\n"			/* shift them to position */
+		: [ret] "=&d" (ret)		/* output */
+		: [ipl] "d" (ipl)		/* input */
+		: "d0"	/* clobber */
+	);
+
+	return ret;
+}
+
+#endif /* _EXCEPTIONS_H_ */