#!/usr/bin/expect

#
# \brief  Implementation of the interface provided by 'tool/run'
# \author Martin Stein
# \date   2011-12-16
#


######################
## Utility routines ##
######################

#
# Build an assembly file that enables the creation of a single boot image
#
# \param file      targeted file
# \parem binaries  targeted boot modules, must reside in '[run_dir]/genode/'
#
# This file rawly includes all binaries given in
# 'binaries', minus 'core' if given, plus 'config' if available. It also
# provides a simple file system that enables Genode to access these BLOBs.
#
proc boot_modules_arm_v7a {{file} {binaries}} {

	set load_store_alignm 0x3
	set min_page_alignm   12

	# introduce boot module headers
	exec echo -e \
		  "/**" \
		"\n * This file was automatically generated by the procedure" \
		"\n * 'boot_modules_arm_v7a' in 'run/env'." \
		"\n */" \
		"\n" \
		"\n.section .data" \
		"\n" \
		"\n.align ${load_store_alignm}" \
		"\n.global _boot_modules_begin" \
		"\n_boot_modules_begin:" \
		"\n.string \"GROM\"" \
		"\n" \
		"\n.align ${load_store_alignm}" \
		"\n.global _boot_module_headers_begin" \
		"\n_boot_module_headers_begin:" > $file

	# generate header for each boot module except core
	set i 1
	foreach binary $binaries {
		if {$binary == "core"} { continue }
		exec echo -e \
			"\n.long mod${i}_name" \
			"\n.long mod${i}_start" \
			"\n.long mod${i}_end - mod${i}_start" >> $file
		incr i
	}

	# end boot module headers
	exec echo -e \
		"\n.global _boot_module_headers_end" \
		"\n_boot_module_headers_end:" \
		"\n" >> $file

	# generate name string for each module except core
	set i 1
	foreach binary $binaries {
		if {$binary == "core"} { continue }
		exec echo -e \
			".align ${load_store_alignm}" \
			"\nmod${i}_name:" \
			"\n.string \"${binary}\"" \
			"\n.byte 0" \
			"\n" >> $file
		incr i
	}

	# include raw data of modules consecutively but page aligned
	set i 1
	foreach binary $binaries {
		if {$binary == "core"} { continue }
		exec echo -e \
			".align ${min_page_alignm}" \
			"\nmod${i}_start:" \
			"\n.incbin \"[run_dir]/genode/${binary}\"" \
			"\nmod${i}_end:" \
			"\n" >> $file
		incr i
	}

	# end boot-modules file
	exec echo -e \
		".global _boot_modules_end" \
		"\n_boot_modules_end:" >> $file
}


#
# Ensure that the next Genode build includes no target specific boot modules
#
proc disable_specific_boot_modules { } {

	exec rm -rf boot_modules.s
	exec rm -rf var/libcache/boot_modules/boot_modules.o
}


#
# Ensure that the next Genode build includes target specific boot modules
#
proc enable_specific_boot_modules {file} {

	exec rm -rf boot_modules.s
	exec ln -s $file boot_modules.s
	exec rm -rf var/libcache/boot_modules/boot_modules.o
}


#
# Apply the boot modules file 'file' to the core image
#
proc apply_boot_modules_to_core {file} {

	# recompile 'core', with specific boot modules
	puts "Building single boot image"
	set timeout 10000
	enable_specific_boot_modules $file
	set pid [eval "spawn make core"]
	expect { eof { } }
	if {[lindex [wait $pid] end] != 0} {
		puts "Error: Genode build failed"
		exit -4
	}

	# clean up for subsequent builds
	disable_specific_boot_modules
	puts "Single boot image built"
}


######################################
## Interface supplied by 'tool/run' ##
######################################

proc build {targets} {

	# skip targets that shall not be build
	if {[get_cmd_switch --skip-build]} return

	# handle false remnants of previous builds
	disable_specific_boot_modules

	#
	# Build all remaining targets.
	# Core is build with a dummy boot-modules file first.
	#
	regsub -all {\s\s+} $targets " " targets
	puts "building targets: $targets"
	set timeout 10000
	set pid [eval "spawn make $targets"]
	expect { eof { } }
	if {[lindex [wait $pid] end] != 0} {
		puts "Error: Genode build failed"
		exit -4
	}
	puts "genode build completed"
}


proc install_config {config} {

	set fh [open "bin/config" "WRONLY CREAT TRUNC"]
	puts $fh $config
	close $fh
}


proc create_boot_directory { } {

	exec rm -rf [run_dir]
	exec mkdir -p [run_dir]/genode
}


proc build_boot_image {binaries} {

	# create additional stripped version of any binary
	copy_and_strip_genode_binaries_to_run_dir $binaries

	# append init configuration if existent to the binaries
	if {[file exists "bin/config"] == 1} {
		exec cp bin/config [run_dir]/genode
		append binaries " config"
	}

	# create scenario-specific 'boot_modules.s' of all given binaries
	set boot_modules "[run_dir]/boot_modules.s"
	if { [have_spec {arm_v7a}] } {
		boot_modules_arm_v7a $boot_modules $binaries
	}

	# preserve stand-alone core for debugging
	exec mv core/core core/core.standalone

	# apply the new 'boot_modules.s' to 'core' to create single boot image
	apply_boot_modules_to_core $boot_modules
	exec mv core/core [run_dir]/image.elf
	exec [cross_dev_prefix]strip [run_dir]/image.elf

	# remove stripped binaries and retrieve stand-alone core
	exec mv core/core.standalone core/core
	exec rm -r [run_dir]/genode
}


proc run_genode_until {{wait_for_re forever} {timeout_value 0}} {

	# get the targeted method of execution, the default is 'qemu'
	set image [run_dir]/image.elf
	set target [get_cmd_arg --target "qemu"]

	# try to execute image according to the targeted method of execution
	if { $target == "qemu" } {
		spawn_qemu $wait_for_re $timeout_value
	} else {
		puts stderr "Error: Target '${target}' is not supported"
		puts stderr "       Supported targets are: 'qemu'"; exit -3
	}
}