20000317 sourceware import

1 files changed, 118 insertions, 0 deletions

diff --git a/libgloss/m68k/cpu32bug.S b/libgloss/m68k/cpu32bug.S
new file mode 100644
index 0000000..39f31d4
--- /dev/null
+++ b/libgloss/m68k/cpu32bug.S
@@ -0,0 +1,118 @@
+/*
+ * cpu32bug.S -- board support for the CPU32BUG monitor.
+ *
+ * Copyright (c) 1995, 1996 Cygnus Support
+ *
+ * The authors hereby grant permission to use, copy, modify, distribute,
+ * and license this software and its documentation for any purpose, provided
+ * that existing copyright notices are retained in all copies and that this
+ * notice is included verbatim in any distributions. No written agreement,
+ * license, or royalty fee is required for any of the authorized uses.
+ * Modifications to this software may be copyrighted by their authors
+ * and need not follow the licensing terms described here, provided that
+ * the new terms are clearly indicated on the first page of each file where
+ * they apply.
+ */
+
+#include "asm.h"
+#include "cpu32bug.h"
+
+	.title "cpu32bug.S for m68k-coff"
+
+	.text
+	.global SYM (_exit)
+	.global SYM (outln)
+	.global SYM (outbyte)
+	.global SYM (putDebugChar)
+	.global SYM (inbyte)
+	.global SYM (getDebugChar)
+	.global SYM (havebyte)
+
+/*
+ * _exit -- Exit from the application. Normally we cause a user trap
+ *          to return to the ROM monitor for another run.
+ */
+	.text
+	.align	2
+SYM (_exit):
+	link	fp, IMM(0)
+        trap	IMM(15)
+        .word	RETURN
+
+/*
+ * inbyte -- get a byte from the serial port
+ *	d0 - contains the byte read in
+ */
+	.text
+	.align	2
+SYM (getDebugChar):		/* symbol name used by m68k-stub */
+SYM (inbyte):
+	link	fp, IMM(-8)
+	trap 	IMM(15)
+	.word	INCHR
+	moveb 	sp@, d0
+	extw	d0
+	extl	d0
+	unlk	fp
+	rts
+
+/*
+ * outbyte -- sends a byte out the serial port
+ *	d0 - contains the byte to be sent
+ */
+	.text
+	.align	2
+SYM (putDebugChar):		/* symbol name used by m68k-stub */
+SYM (outbyte):
+	link	fp, IMM(-4)
+ 	moveb	fp@(11), sp@
+	trap 	IMM(15)
+	.word	OUTCHR
+	unlk	fp
+	rts
+
+/*
+ * outln -- sends a string of bytes out the serial port with a CR/LF
+ *	a0 - contains the address of the string's first byte
+ *	a1 - contains the address of the string's last byte
+ */
+	.text
+	.align	2
+SYM (outln):
+	link	fp, IMM(-8)
+	moveml	a0/a1, sp@
+	trap 	IMM(15)
+	.word 	OUTLN
+	unlk	fp
+	rts
+
+/*
+ * outstr -- sends a string of bytes out the serial port without a CR/LF
+ *	a0 - contains the address of the string's first byte
+ *	a1 - contains the address of the string's last byte
+ */
+	.text
+	.align	2
+SYM (outstr):
+	link	fp, IMM(-8)
+	moveml	a0/a1, sp@
+	trap 	IMM(15)
+	.word 	OUTSTR
+	unlk	fp
+	rts
+
+/*
+ * havebyte -- checks to see if there is a byte in the serial port,
+ *             returns 1 if there is a byte, 0 otherwise.
+ */
+	.text
+	.align	2
+SYM (havebyte):
+	trap 	IMM(15)
+	.word	INSTAT
+	beqs	empty
+	movel 	IMM(1), d0
+	rts
+empty:
+	movel	IMM(0), d0
+	rts