##
# Get the base-okl4 repository
#
proc base_okl4_dir {} { return [repository_contains mk/spec-okl4.mk] }


##
# Read the location of the OKL4 directory from 'etc/okl4.conf'
#
proc okl4_dir { } {
	global _okl4_dir

	if {![info exists _okl4_dir]} {
		if {[file exists etc/okl4.conf]} {
			set _okl4_dir [exec sed -n "/^OKL4_DIR/s/^.*=\\s*//p" etc/okl4.conf]
			if {[file exists $_okl4_dir]} { return $_okl4_dir }
		}

		set _okl4_dir [base_okl4_dir]/contrib/okl4
	}

	return $_okl4_dir
}


##
# Return the location of the OKL4 kernel
#
proc okl4 { } {
	if {[okl4_external]} { return [okl4_dir]/build/pistachio/bin/kernel }
	return bin/kernel
}


##
# Return whether okl4 kernel is provided from the outside
#
proc okl4_external { } {
	if {"[okl4_dir]" == "[base_okl4_dir]/contrib/okl4"} { return 0 }
	return 1
}


set weaver_xml_template {
	<machine>
		<word_size size="0x20" />
		<virtual_memory name="virtual">
			<region base="0x120000" size="0x3fe00000" />
		</virtual_memory>
		<physical_memory name="system_dram">
			<region base="0x0" size="0xa000" type="dedicated" />
		</physical_memory>
		<physical_memory name="bios">
			<region base="0xf0000" size="0x10000" type="dedicated" />
		</physical_memory>
		<physical_memory name="rom_expansion">
			<region base="0x100000" size="0x1800000" type="dedicated" />
		</physical_memory>
		<physical_memory name="physical">
			<region base="0x2000000" size="0x1d000000" type="conventional" />
		</physical_memory>
		<phys_device name="timer_dev">
			<interrupt name="int_timer0" number="0" />
		</phys_device>
		<phys_device name="serial_dev">
			<interrupt name="int_serial0" number="4" />
		</phys_device>
		<phys_device name="rtc_dev">
		</phys_device>
		<page_size size="0x1000" />
		<page_size size="0x400000" />
	</machine>
	<physical_pool name="system_dram" direct="true">
		<memory src="system_dram" />
	</physical_pool>

	<virtual_pool name="virtual">
		<memory src="virtual" />
	</virtual_pool>

	<physical_pool name="bios" direct="true">
		<memory src="bios" />
	</physical_pool>

	<physical_pool name="rom_expansion" direct="true">
		<memory src="rom_expansion" />
	</physical_pool>

	<physical_pool name="physical" direct="true">
		<memory src="physical" />
	</physical_pool>

	<kernel file="okl4_kernel" xip="false" >
		<dynamic max_threads="0x400" />
		<config>
			<option key="root_caps" value="4096"/>
		</config>
	</kernel>

	<rootprogram file="core" virtpool="virtual" physpool="physical" />
}


##
# Populate directory with binaries on OKL4
#
proc run_boot_dir {binaries} {
	global weaver_xml_template

	#
	# Strip binaries
	#
	copy_and_strip_genode_binaries_to_run_dir $binaries

	#
	# Build kernel if needed
	#
	# Once the kernel is exists, it gets never revisited automatically.
	# Consequently, when changing the kernel sources, the kernel build must be
	# issued explicitly via 'make kernel'. This way, the rare case of changing
	# the kernel does not stand in the way of the everyday's work flow of
	# executing run scripts as quick as possible.
	#
	if {![okl4_external] && ![file exists [okl4]]} { build { kernel } }

	exec cp [okl4] [run_dir]/kernel

	#
	# Generate ELF weaver config
	#
	set fh [open "[run_dir].weaver.xml" "WRONLY CREAT TRUNC"]
	puts $fh {<?xml version="1.0"?>}
	puts $fh {<!DOCTYPE image SYSTEM "weaver-1.1.dtd">}
	puts $fh {<image>}
	regsub okl4_kernel $weaver_xml_template "[run_dir]/kernel" weaver_xml_template
	regsub core $weaver_xml_template "[run_dir]/genode/core" weaver_xml_template
	puts $fh $weaver_xml_template
	puts $fh {	<pd name="modules">}
	puts $fh "		<memsection name=\"config\" file=\"[run_dir]/genode/config\" direct=\"true\" />"
	foreach binary $binaries {
		if {$binary != "core"} {
			puts $fh "		<memsection name=\"$binary\" file=\"[run_dir]/genode/$binary\" direct=\"true\" />" }
	}
	puts $fh {	</pd>}
	puts $fh {</image>}
	close $fh

	#
	# Run ELF Weaver to create a boot image
	#
	set ret [exec "./tool/okl4/elfweaver" merge --output "[run_dir]/image.elf" "[run_dir].weaver.xml"]
	if {[regexp "error" $ret dummy]} {
		puts stderr "Elfweaver failed: $ret"
		exit -6
	}
	exec [cross_dev_prefix]strip [run_dir]/image.elf
	exec cp [run_dir]/image.elf [run_dir].elf

	#
	# Keep only the ELF boot image, but remove stripped binaries
	#
	exec rm -r [run_dir]/genode

	if {[have_include "image/iso"] || [have_include "image/disk"]} {
		#
		# Install GRUB
		#
		install_iso_bootloader_to_run_dir

		#
		# Generate grub config file
		#
		# The core binary is part of the 'binaries' list but it must
		# appear right after 'sigma0' as boot module. Hence the special case.
		#
		set fh [open "[run_dir]/boot/grub/menu.lst" "WRONLY CREAT TRUNC"]
		puts $fh "timeout 0"
		puts $fh "default 0"
		puts $fh "hiddenmenu"
		puts $fh "\ntitle Genode on OKL4"
		puts $fh " kernel /boot/bender"
		puts $fh " module /image.elf"
		puts $fh " vbeset 0x117"
		close $fh
	}

	#
	# Build image
	#
	run_image

	if {[have_include "load/tftp"]} {
		#
		# Install PXE bootloader pulsar
		#
		install_pxe_bootloader_to_run_dir

		#
		# Generate pulsar config file
		#
		set fh [open "[run_dir]/config-52-54-00-12-34-56" "WRONLY CREAT TRUNC"]
		# load okl4 at 256M to avoid overwritting binary, adjust by need
		puts $fh " addr 0x10000000"
		puts $fh " exec /boot/bender"
		puts $fh " load /image.elf"
		close $fh

		generate_tftp_config
	}
}