merged trunk changes

i2cspi_BaS_gcc/sources/xhdi_vec.S

@@ -0,0 +1,40 @@
+//
+// XHDI entry point
+//
+		.extern	_xhdi_call
+
+		.globl	_xhdi_vec
+		.globl	_xhdi_sd_install
+
+//
+// this is where the XHDI cookie points to:
+//
+
+		.text
+_xhdi_vec:
+		lea     -12(sp),sp		// save all used registers according to XHDI spec
+		movem.l d1/a0-a1,(sp)
+
+		pea     16(sp)			// forward address of parameters on stack
+		jsr		_xhdi_call		// to internal routine
+		addq.l  #4,sp			// correct stack
+
+		movem.l (sp),d1/a0-a1	// restore registers
+		lea     12(sp),sp
+		rts
+
+		.data
+_old_vector:
+		.ds.l	1
+
+		.text
+
+//
+// trap #0 handler to bring the address of the disk routines into TOS
+//
+_xhdi_sd_install:
+		move.l	4(sp),d0		// address of the old XHDI vector
+		move.l	d0,_old_vector	// save it - just in case we need it later
+		move.l	#_xhdi_vec,d0	// return our BaS vector to TOS
+		move.l	d0,a0			//
+		rte