1 files changed, 115 insertions, 0 deletions

diff --git a/arch/mn10300/kernel/gdb-low.S b/arch/mn10300/kernel/gdb-low.S
new file mode 100644
index 000000000000..e2725552cd82
--- /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