1 files changed, 62 insertions, 0 deletions
diff --git a/src/roms/SLOF/board-js2x/llfw/board_io.S b/src/roms/SLOF/board-js2x/llfw/board_io.S
new file mode 100644
index 0000000..2f36588
--- /dev/null
+++ b/src/roms/SLOF/board-js2x/llfw/board_io.S
@@ -0,0 +1,62 @@
+/******************************************************************************
+ * Copyright (c) 2004, 2008 IBM Corporation
+ * All rights reserved.
+ * This program and the accompanying materials
+ * are made available under the terms of the BSD License
+ * which accompanies this distribution, and is available at
+ * http://www.opensource.org/licenses/bsd-license.php
+ *
+ * Contributors:
+ *     IBM Corporation - initial implementation
+ *****************************************************************************/
+
+#include <macros.h>
+#include <cpu.h>
+
+	.text
+
+C_ENTRY(copy_from_flash)
+# size in GPR3 (multiple of 64), from GPR4, to GPR5
+	mflr 24 ; mtctr 3 ; addi 4,4,-64 ; addi 5,5,-64
+0:	SETCI(r0)
+	ldu 16,64(4) ; ld 17,8(4) ; ld 18,16(4) ; ld 19,24(4)
+	ld 20,32(4) ; ld 21,40(4) ; ld 22,48(4) ; ld 23,56(4)
+	CLRCI(r0)
+	stdu 16,64(5) ; std 17,8(5) ; std 18,16(5) ; std 19,24(5)
+	std 20,32(5) ; std 21,40(5) ; std 22,48(5) ; std 23,56(5)
+	sync ; icbi 0,2 ; bdnz 0b ; sync ; isync ; mtlr 24 ; blr
+
+/****************************************************************************
+ * prints one character to serial console
+ *
+ * Input:
+ * R3 - character
+ *
+ * Returns: -
+ *
+ * Modifies Registers:
+ * R3, R4, R5, R6, R7
+ ****************************************************************************/
+ENTRY(io_putchar)
+	mflr	r7
+
+	SETCI(r0)
+
+	# always use serial1
+	li 4,0x3f8 ; oris 4,4,0xf400
+
+	# print one char
+0:	lbz 0,5(4) ; andi. 0,0,0x20 ; beq 0b ; stb 3,0(4) ; eieio 
+
+	# also print char to serial2 if on a JS21
+	# read ID register: only if it is a PC87427 (JS21) also use serial2
+	addi 4,4,-0x3f8
+	li 5,0x20 ; stb 5,0x2e(4) ; lbz 5,0x2f(4) ; cmpdi 5,0xf2 ; bne 1f
+
+	addi 4,4,0x2f8
+0:	lbz 0,5(4) ; andi. 0,0,0x20 ; beq 0b ; stb 3,0(4) ; eieio 
+
+1:	CLRCI(r0)
+
+	mtlr	r7
+	blr