#####################################################################
# Author: Benjamen R. Meyer                                         #
# Date: 2004-2-15                                                   #
# Purpose: To build Josh Holtrop's OS (HOS) using GNU make          #
# Note: This makefile is for use on Linux & other Unix-like systems #
#####################################################################

##############
# Variables: #
##############

# Information for creating a floppy image
# Note: FLOPPY_FS and FLOPPY_FAT_SIZE are related fields.
#       FLOPPY_FAT_SIZE should be either 12 or 16,
#       depending on if FLOPPY_FS is FAT12 or FAT16, respectively.
MKDOSFS_PROG=format
FLOPPY_IMAGE=floppy.img
FLOPPY_BLOCK_COUNT=1440
FLOPPY_FS=FAT12
FLOPPY_FAT_SIZE=12

# Floppy images are good for programs like VMware and Bochs Pentium Emulator. ;-)

# Program for copying
COPY_BIN=copy

##########################################
# Build the IPL (Boot Loader) and Kernel #
##########################################
all:
	# A word of warning to users :-> And a little helpful information ;-)
	@echo "Installation must be done as root."
	@echo "Type 'make install' to install to a floppy in drive '/dev/fd0'"
	@echo "Type 'make install_img' to create a floppy image and install to it."

	cd boot; make
	cd kernel; make -f Makefile.ms

#################################################
# Clean up the source directory of any binaries #
#################################################
clean:
	cd boot; make clean
	cd kernel; make clean



###########################################
# The following is for the floppy drive   #
# Note: This must be done on *nix as root #
###########################################

##########################
# Make install to floppy #
##########################
install: Install_IPL File_Copy

############################################
# Write the Stage 1 IPL to the boot sector #
############################################
Install_IPL:
	$(MKDOSFS_PROG) a: /q /v:HOS
	partcopy stage1.bin 0 200 -f0

#################################
# Copy the files onto the drive #
#################################
File_Copy:
	@echo "Copying stage 2 bootloader to the floppy..."
	$(COPY_BIN) boot/stage2.bin a:\

	@echo "Copying kernel to the floppy..."
	$(COPY_BIN) kernel/kernel.bin a:\


############################################
# The following is for the floppy image.   #
# Note: This must be done on *nix as root. #
############################################

######################################
# Create and Format the floppy image #
######################################
install_img:
	$(MKDOSFS_PROG) -C -F $(FLOPPY_FAT_SIZE) -r 112 $(FLOPPY_IMAGE) $(FLOPPY_BLOCK_COUNT)

############################################
# Write the Stage 1 IPL to the boot sector #
############################################
	@echo "Writing boot sector to image..."
	dd if=stage1.bin of=$(FLOPPY_IMAGE) seek=0

#################################
# Copy the files onto the image #
#################################
	@echo "Mounting floppy image..."
	mount $(FLOPPY_IMAGE) $(FLOPPY_MOUNT) -o loop

	@echo "Copying stage 2 bootloader to the floppy image..."
	$(COPY_BIN) stage2.bin $(FLOPPY_MOUNT)
	@echo "Copying kernel to the floppy image..."
	$(COPY_BIN) kernel.bin $(FLOPPY_MOUNT)

	@echo "Unmounting floppy image..."
	mount $(FLOPPY_IMAGE) $(FLOPPY_MOUNT) -o loop