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# Copyright 2009, 2010 Free Software Foundation, Inc.

#

# This program is free software; you can redistribute it and/or modify

# it under the terms of the GNU General Public License as published by

# the Free Software Foundation; either version 3 of the License, or

# (at your option) any later version.

#

# This program is distributed in the hope that it will be useful,

# but WITHOUT ANY WARRANTY; without even the implied warranty of

# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the

# GNU General Public License for more details.

#

# You should have received a copy of the GNU General Public License

# along with this program.  If not, see .

#

# Contributed by Markus Deuling .

#

# Support library for testing the combined debugger for Linux

# on the Cell Broadband Engine.

# Compile SPU objects.

proc gdb_compile_cell_spu {source dest type options} {

  global board

  # Save and unset multilib flags; these are not appropriate

  # for the SPU compiler.

  set board [target_info name]

  set save_multilib_flag [board_info $board multilib_flags]

  unset_board_info "multilib_flags"

  set options_spu [concat $options [list compiler=spu-gcc]]

  set ccout [gdb_compile $source $dest $type $options_spu]

  set_board_info multilib_flags $save_multilib_flag

  return $ccout

}

# Compile PPU objects.  This is just like gdb_compile_pthreads, except that we

# always add the libspe2 library for compiling Cell/B.E. programs.

proc gdb_compile_cell_ppu {source dest type options} {

    # We do not need to try multiple names for the pthread library

    # -lpthread works on all Cell/B.E. systems

    set lib "-lspe2 -lpthread"

    set options_ppu [concat $options [list libs=$lib]]

    return [gdb_compile $source $dest $type $options_ppu]

}

# Embed SPU executable into a PPU object.

proc gdb_cell_embedspu {source dest options} {

    global CC_FOR_TARGET

    if [info exists CC_FOR_TARGET] {

        set compiler $CC_FOR_TARGET

    } else {

        set compiler [board_info [target_info name] compiler]

    }

    # We assume the PPU compiler is called gcc or ppu-gcc,

    # and find the appropriate embedspu based on that.

    regsub gcc "$compiler" embedspu embedspu

    # Determine default embedded symbol name from source filename.

    set path [split "$source" /]

    set filename [lindex $path [expr [llength $path] - 1]]

    regsub -all -- "\[-\.\]" "$filename" "_" symbol

    set options_embed [concat $options [list compiler=$embedspu]]

    return [gdb_compile "$symbol $source $dest" "" none $options_embed]

}

# Run a test on the target to see if it supports Cell/B.E. hardware.

# Return 0 if so, 1 if it does not.

proc skip_cell_tests {} {

    global skip_cell_tests_saved

    global srcdir subdir gdb_prompt

    # Use the cached value, if it exists.

    set me "skip_cell_tests"

    if [info exists skip_cell_tests_saved] {

        verbose "$me:  returning saved $skip_cell_tests_saved" 2

        return $skip_cell_tests_saved

    }

    # Set up, compile, and execute a combined Cell/B.E. test program.

    # Include the current process ID in the file names to prevent conflicts

    # with invocations for multiple testsuites.

    set src cell[pid].c

    set exe cell[pid].x

    set src_spu cell[pid]-spu.c

    set exe_spu cell[pid]-spu.x

    set f [open $src "w"]

    puts $f "#include "

    puts $f "extern spe_program_handle_t cell[pid]_spu_x;"

    puts $f "int main (void) {"

    puts $f "unsigned int entry = SPE_DEFAULT_ENTRY;"

    puts $f "spe_context_ptr_t ctx = spe_context_create (0, NULL);"

    puts $f "spe_program_load (ctx, &cell[pid]_spu_x);"

    puts $f "return spe_context_run (ctx, &entry, 0, NULL, NULL, NULL); }"

    close $f

    set f [open $src_spu "w"]

    puts $f "int main (void) { return 0; }"

    close $f

    verbose "$me:  compiling testfile $src" 2

    set compile_flags {debug nowarnings quiet}

    set skip 0

    if { [gdb_compile_cell_spu $src_spu $exe_spu executable $compile_flags] != "" } {

        verbose "$me:  compiling spu binary failed, returning 1" 2

        set skip 1

    }

    if { ! $skip && [gdb_cell_embedspu $exe_spu $exe_spu-embed.o $compile_flags]  != "" } {

        verbose "$me:  embedding spu binary failed, returning 1" 2

        set skip 1

    }

    if { ! $skip && [gdb_compile_cell_ppu [list $src $exe_spu-embed.o] $exe executable $compile_flags] != "" } {

        verbose "$me:  compiling ppu binary failed, returning 1" 2

        set skip 1

    }

    file delete $src

    file delete $src_spu

    file delete $exe_spu

    file delete $exe_spu-embed.o

    if { $skip } {

        return [set skip_cell_tests_saved 1]

    }

    # Compilation succeeded so now run it via gdb.

    gdb_exit

    gdb_start

    gdb_reinitialize_dir $srcdir/$subdir

    gdb_load "$exe"

    gdb_run_cmd

    gdb_expect {

        -re ".*Program exited normally.*${gdb_prompt} $" {

            verbose -log "\n$me: Cell/B.E. hardware detected"

            set skip_cell_tests_saved 0

        }

        -re ".*Program exited with code.*${gdb_prompt} $" {

            verbose -log "\n$me: Cell/B.E. hardware not detected"

            set skip_cell_tests_saved 1

        }

        default {

            verbose -log "\n$me Cell/B.E. hardware not detected (default case)"

            set skip_cell_tests_saved 1

        }

    }

    gdb_exit

    remote_file build delete $exe

    verbose "$me:  returning $skip_cell_tests_saved" 2

    return $skip_cell_tests_saved

}

# Delete all breakpoints and stop on the next new SPU thread

proc cont_spu_main { } {

  delete_breakpoints

  gdb_test "set spu stop-on-load on"

  gdb_test "continue" \

           "Continuing.*Temporary breakpoint .*main .*" \

           "continue to SPU main"

}

# Continue to MARKER

proc c_to { marker srcfile } {

  set line [gdb_get_line_number $marker $srcfile]

  gdb_test "break $line" \

           "Breakpoint.*at.*file.*$srcfile.*line $line.*" \

           "break $line"

  gdb_test "continue" \

           "Continuing.*Breakpoint.*at.*$srcfile.*$line.*" \

           "continue to $line"

}

# Check if the current thread has SPU architecture

proc check_spu_arch { msg } {

  if { $msg == "" } {

    set msg "spu architecture is spu256K"

  }

  gdb_test "show architecture" \

           "The target architecture is set automatically.*currently spu:256K.*" \

           $msg

}