* arc-tdep.c: #include "gdbcmd.h".
(codestream_seek): Pass CORE_ADDR.
(arc_cpu_type, tmp_arc_cpu_type, arc_cpu_type_table): New globals.
(debug_pipeline_p): Likewise.
(X_...): Instruction field access macros.
(BUILD_INSN): Define.
(codestream_tell): Allow for stream elements > 1 byte.
(codestream_fill): Likewise.
(setup_prologue_scan): New function.
(arc_get_frame_setup): Call it. Update to current spec
regarding prologues. Use BUILD_INSN.
(skip_prologue): New argument `frameless_p'. Use BUILD_INSN.
(arc_frame_saved_pc): New function.
(frame_find_saved_regs): Use BUILD_INSN.
(get_insn_type, single_step): New functions.
(one_stepped): New global.
(arc_set_cpu_type_command, arc_show_cpu_type_command): New functions.
(arc_set_cpu_type): New function.
(_initialize_arc_tdep): Define new `set' commands `cpu',
`displaypipeline', and `debugpipeline'.
* remote-arc.c (break_insn): Add bi-endian support.
(arc_insert_breakpoint): Likewise.
(arc_remove_breakpoint): Likewise.
(switch_command): Delete.
* arc/tm-arc.h (TARGET_BYTE_ORDER): Delete.
(TARGET_BYTE_ORDER_SELECTABLE): Define.
(DEFAULT_ARC_CPU_TYPE): Define.
(SKIP_PROLOGUE_FRAMELESS_P): Define.
(BREAKPOINT): Delete.
(BIG_BREAKPOINT, LITTLE_BREAKPOINT): Define.
(DECR_PC_AFTER_BREAK): Change to 8.
(NO_SINGLE_STEP): Define.
(ARC_PC_TO_REAL_ADDRESS): Define.
(SAVED_PC_AFTER_CALL): Use it.
(NUM_REGS, REGISTER_BYTES): Fix.
(FRAME_SAVED_PC): Call arc_frame_saved_pc.
(FRAME_LOCALS_ADDRESS): Fix.
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