From 8e4bff4cab0ddac6060645b0715210484d02ff40 Mon Sep 17 00:00:00 2001
From: Yuval Adam <_@yuv.al>
Date: Wed, 30 Aug 2017 08:25:59 +0000
Subject: Initial file dump from open source release

---
 arch/mn10300/kernel/gdb-low.S | 115 ++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 115 insertions(+)
 create mode 100644 arch/mn10300/kernel/gdb-low.S

(limited to 'arch/mn10300/kernel/gdb-low.S')

diff --git a/arch/mn10300/kernel/gdb-low.S b/arch/mn10300/kernel/gdb-low.S
new file mode 100644
index 00000000..e2725552
--- /dev/null
+++ b/arch/mn10300/kernel/gdb-low.S
@@ -0,0 +1,115 @@
+###############################################################################
+#
+# MN10300 Low-level gdbstub routines
+#
+# Copyright (C) 2007 Red Hat, Inc. All Rights Reserved.
+# Written by David Howells (dhowells@redhat.com)
+#
+# This program is free software; you can redistribute it and/or
+# modify it under the terms of the GNU General Public Licence
+# as published by the Free Software Foundation; either version
+# 2 of the Licence, or (at your option) any later version.
+#
+###############################################################################
+#include <linux/sys.h>
+#include <linux/linkage.h>
+#include <asm/smp.h>
+#include <asm/cache.h>
+#include <asm/cpu-regs.h>
+#include <asm/exceptions.h>
+#include <asm/frame.inc>
+#include <asm/serial-regs.h>
+
+	.text
+
+###############################################################################
+#
+# GDB stub read memory with guard
+# - D0 holds the memory address to read
+# - D1 holds the address to store the byte into
+#
+###############################################################################
+	.globl gdbstub_read_byte_guard
+	.globl gdbstub_read_byte_cont
+ENTRY(gdbstub_read_byte)
+	mov	d0,a0
+	mov	d1,a1
+	clr	d0
+gdbstub_read_byte_guard:
+	movbu	(a0),d1
+gdbstub_read_byte_cont:
+	movbu	d1,(a1)
+	ret	[],0
+
+	.globl gdbstub_read_word_guard
+	.globl gdbstub_read_word_cont
+ENTRY(gdbstub_read_word)
+	mov	d0,a0
+	mov	d1,a1
+	clr	d0
+gdbstub_read_word_guard:
+	movhu	(a0),d1
+gdbstub_read_word_cont:
+	movhu	d1,(a1)
+	ret	[],0
+
+	.globl gdbstub_read_dword_guard
+	.globl gdbstub_read_dword_cont
+ENTRY(gdbstub_read_dword)
+	mov	d0,a0
+	mov	d1,a1
+	clr	d0
+gdbstub_read_dword_guard:
+	mov	(a0),d1
+gdbstub_read_dword_cont:
+	mov	d1,(a1)
+	ret	[],0
+
+###############################################################################
+#
+# GDB stub write memory with guard
+# - D0 holds the byte to store
+# - D1 holds the memory address to write
+#
+###############################################################################
+	.globl gdbstub_write_byte_guard
+	.globl gdbstub_write_byte_cont
+ENTRY(gdbstub_write_byte)
+	mov	d0,a0
+	mov	d1,a1
+	clr	d0
+gdbstub_write_byte_guard:
+	movbu	a0,(a1)
+gdbstub_write_byte_cont:
+	ret	[],0
+
+	.globl gdbstub_write_word_guard
+	.globl gdbstub_write_word_cont
+ENTRY(gdbstub_write_word)
+	mov	d0,a0
+	mov	d1,a1
+	clr	d0
+gdbstub_write_word_guard:
+	movhu	a0,(a1)
+gdbstub_write_word_cont:
+	ret	[],0
+
+	.globl gdbstub_write_dword_guard
+	.globl gdbstub_write_dword_cont
+ENTRY(gdbstub_write_dword)
+	mov	d0,a0
+	mov	d1,a1
+	clr	d0
+gdbstub_write_dword_guard:
+	mov	a0,(a1)
+gdbstub_write_dword_cont:
+	ret	[],0
+
+###############################################################################
+#
+# GDB stub BUG() trap
+#
+###############################################################################
+ENTRY(__gdbstub_bug_trap)
+	.byte	0xF7,0xF7	# don't use 0xFF as the JTAG unit preempts that
+	ret	[],0
-- 
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