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#                           GNU GPL OS/K                                     #
#                                                                            #
#  Authors:    spectral`                                                     #
#              NeoX                                                          #
#                                                                            #
#  Desc:       Project Makefile                                              #
#----------------------------------------------------------------------------#

CCNAME="/opt/cross-cc/bin/x86_64-elf-gcc"
CC2NAME=gcc # compiler for testing
CLDSCR=-T kernel.ld
CWARNS= -pedantic -Wall -Wextra -Werror
CFLAGS=-nostdlib -ffreestanding -mcmodel=large -mno-red-zone -mno-mmx -mno-sse -mno-sse2
CINCLUDES=-I./kaleid
CDEFINES=

CC=$(CCNAME) $(CWARNS) $(CFLAGS) $(CDEFINES) $(CINCLUDES)
KCC=$(CC) -D_KALEID_KERNEL

ASM=nasm
ASMFLAGS=
BOOTFLAGS=-f bin

BINDIR=../bin
OBJDIR=../obj

BOOTDIR=boot
COMMDIR=kaleid/common
KERNDIR=kaleid/kernel
SYSTDIR=kaleid/system
LINXDIR=kaleid/linux

all: bootloader

boot.mbr.s: $(BOOTDIR)/mbr.s $(BOOTDIR)/mbr.inc
	$(ASM) $(BOOTFLAGS) $(BOOTDIR)/mbr.s -o $(OBJDIR)/boot/mbr.bin

boot.loader.s: $(BOOTDIR)/loader.s
	$(ASM) $(BOOTFLAGS) $(BOOTDIR)/loader.s -o $(OBJDIR)/boot/loader.bin

bootloader: boot.mbr.s boot.loader.s
	cp $(OBJDIR)/boot/mbr.bin $(BINDIR)/mbr.bin
	cp $(OBJDIR)/boot/loader.bin $(BINDIR)/loader.bin
    
#----------------------------------------------------------------------------#
# TESTING MAKEFILE

pseudo_kern:
	$(ASM) $(BOOTFLAGS) $(BOOTDIR)/pseudo_kernel.s -o $(OBJDIR)/boot/pkernel.bin

testing: bootloader pseudo_kern
	cat $(BINDIR)/bootloader.bin $(OBJDIR)/boot/pkernel.bin > $(BINDIR)/boot.bin

#----------------------------------------------------------------------------#
# COMMON MAKEFILE

COBJDIR=$(OBJDIR)/$(COMMDIR)
LOBJDIR=$(OBJDIR)/$(LINXDIR)

COMMDEPS=$(COMMDIR)/common.h $(COMMDIR)/assert.h $(COMMDIR)/atomic.h $(COMMDIR)/config.h \
			$(COMMDIR)/status.h

COMMOBJS=$(COBJDIR)/lib/string.o $(COBJDIR)/lib/status.o

common: $(COMMDEPS) $(COMMDIR)/lib/string.c $(COMMDIR)/lib/status.c
	$(KCC) -c $(COMMDIR)/lib/string.c -o $(COBJDIR)/lib/string.o
	$(KCC) -c $(COMMDIR)/lib/status.c -o $(COBJDIR)/lib/status.o

CCC=$(CC2NAME) $(CWARNS) $(CDEFINES) $(CINCLUDES) 

common-test:
	$(CCC) -c $(COMMDIR)/lib/string.c -o $(COBJDIR)/lib/string.o
	$(CCC) -c $(COMMDIR)/lib/status.c -o $(COBJDIR)/lib/status.o
	$(CCC) -c $(LINXDIR)/test-common.c -o $(LOBJDIR)/test-common.o
	$(CCC) $(COMMOBJS) $(LOBJDIR)/test-common.o -o $(BINDIR)/kaleid-common.elf

#----------------------------------------------------------------------------#
# KERNEL MAKEFILE

KOBJDIR=$(OBJDIR)/$(KERNDIR)

KERNDEPS=common $(KERNDIR)/init.h $(KERNDIR)/io/terminal.h $(KERNDIR)/io/ports.h $(KERNDIR)/ke/panic.h
KERNSRCS=$(KERNDIR)/init.c $(KERNDIR)/ke/panic.c $(KERNDIR)/io/ports.c $(KERNDIR)/io/terminal.c
KERNOBJS=$(KOBJDIR)/init.o $(KOBJDIR)/ke/panic.o $(KOBJDIR)/io/ports.o $(KOBJDIR)/io/terminal.o

kernel: common $(KERNSRCS)
	$(KCC) -c $(KERNDIR)/init.c         -o $(KOBJDIR)/init.o
	$(KCC) -c $(KERNDIR)/ke/panic.c     -o $(KOBJDIR)/ke/panic.o
	$(KCC) -c $(KERNDIR)/io/ports.c     -o $(KOBJDIR)/io/ports.o
	$(KCC) -c $(KERNDIR)/io/terminal.c  -o $(KOBJDIR)/io/terminal.o
	$(KCC) $(CLDSCR) $(COMMOBJS) $(KERNOBJS) -o $(BINDIR)/kaleid-kernel.elf

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