LXR linux/arch/mn10300/kernel/gdb-low.S

   1###############################################################################
   2#
   3# MN10300 Low-level gdbstub routines
   4#
   5# Copyright (C) 2007 Red Hat, Inc. All Rights Reserved.
   6# Written by David Howells (dhowells@redhat.com)
   7#
   8# This program is free software; you can redistribute it and/or
   9# modify it under the terms of the GNU General Public Licence
  10# as published by the Free Software Foundation; either version
  11# 2 of the Licence, or (at your option) any later version.
  12#
  13###############################################################################
  14#include <linux/sys.h>
  15#include <linux/linkage.h>
  16#include <asm/smp.h>
  17#include <asm/cache.h>
  18#include <asm/cpu-regs.h>
  19#include <asm/exceptions.h>
  20#include <asm/frame.inc>
  21#include <asm/serial-regs.h>
  22
  23        .text
  24
  25###############################################################################
  26#
  27# GDB stub read memory with guard
  28# - D0 holds the memory address to read
  29# - D1 holds the address to store the byte into
  30#
  31###############################################################################
  32        .globl gdbstub_read_byte_guard
  33        .globl gdbstub_read_byte_cont
  34ENTRY(gdbstub_read_byte)
  35        mov     d0,a0
  36        mov     d1,a1
  37        clr     d0
  38gdbstub_read_byte_guard:
  39        movbu   (a0),d1
  40gdbstub_read_byte_cont:
  41        movbu   d1,(a1)
  42        ret     [],0
  43
  44        .globl gdbstub_read_word_guard
  45        .globl gdbstub_read_word_cont
  46ENTRY(gdbstub_read_word)
  47        mov     d0,a0
  48        mov     d1,a1
  49        clr     d0
  50gdbstub_read_word_guard:
  51        movhu   (a0),d1
  52gdbstub_read_word_cont:
  53        movhu   d1,(a1)
  54        ret     [],0
  55
  56        .globl gdbstub_read_dword_guard
  57        .globl gdbstub_read_dword_cont
  58ENTRY(gdbstub_read_dword)
  59        mov     d0,a0
  60        mov     d1,a1
  61        clr     d0
  62gdbstub_read_dword_guard:
  63        mov     (a0),d1
  64gdbstub_read_dword_cont:
  65        mov     d1,(a1)
  66        ret     [],0
  67
  68###############################################################################
  69#
  70# GDB stub write memory with guard
  71# - D0 holds the byte to store
  72# - D1 holds the memory address to write
  73#
  74###############################################################################
  75        .globl gdbstub_write_byte_guard
  76        .globl gdbstub_write_byte_cont
  77ENTRY(gdbstub_write_byte)
  78        mov     d0,a0
  79        mov     d1,a1
  80        clr     d0
  81gdbstub_write_byte_guard:
  82        movbu   a0,(a1)
  83gdbstub_write_byte_cont:
  84        ret     [],0
  85
  86        .globl gdbstub_write_word_guard
  87        .globl gdbstub_write_word_cont
  88ENTRY(gdbstub_write_word)
  89        mov     d0,a0
  90        mov     d1,a1
  91        clr     d0
  92gdbstub_write_word_guard:
  93        movhu   a0,(a1)
  94gdbstub_write_word_cont:
  95        ret     [],0
  96
  97        .globl gdbstub_write_dword_guard
  98        .globl gdbstub_write_dword_cont
  99ENTRY(gdbstub_write_dword)
 100        mov     d0,a0
 101        mov     d1,a1
 102        clr     d0
 103gdbstub_write_dword_guard:
 104        mov     a0,(a1)
 105gdbstub_write_dword_cont:
 106        ret     [],0
 107
 108###############################################################################
 109#
 110# GDB stub BUG() trap
 111#
 112###############################################################################
 113ENTRY(__gdbstub_bug_trap)
 114        .byte   0xF7,0xF7       # don't use 0xFF as the JTAG unit preempts that
 115        ret     [],0
 116