set(CMAKE_SHARED_LIBRARY_LINK_C_FLAGS)
set(CMAKE_C_LINK_EXECUTABLE "<CMAKE_LINKER> <LINK_FLAGS> <OBJECTS> -o <TARGET> <LINK_LIBRARIES>")
set(CMAKE_ASM_FLAGS "${CMAKE_ASM_FLAGS} -D__ASSEMBLY__")

configure_file(include/swapfmt.h.in include/swapfmt.h)

execute_process(COMMAND ${CMAKE_C_COMPILER} -print-file-name=include
	OUTPUT_VARIABLE SYSTEM_INCLUDE OUTPUT_STRIP_TRAILING_WHITESPACE)
add_definitions(-D__KERNEL__ -DIHK_OS_MANYCORE
	-DMAP_KERNEL_START=${MAP_KERNEL_START}UL -DKERNEL_RAM_VADDR=${MAP_KERNEL_START})
add_compile_options(-ffreestanding -O2 -nostdinc -isystem ${SYSTEM_INCLUDE} -fno-omit-frame-pointer)
include_directories(
	"${CMAKE_CURRENT_BINARY_DIR}/include"
	"include"
	"${CMAKE_CURRENT_BINARY_DIR}"
	"${PROJECT_BINARY_DIR}"
	"${IHK_FULL_SOURCE_DIR}/cokernel/smp/${ARCH}/include"
	"${IHK_FULL_SOURCE_DIR}/cokernel/smp/${ARCH}/"
	"${IHK_FULL_SOURCE_DIR}/ikc/include"
	"${IHK_FULL_SOURCE_DIR}/linux/include"
	"${PROJECT_SOURCE_DIR}/lib/include"
	"${PROJECT_SOURCE_DIR}/arch/${ARCH}/kernel/include"
)
if (${ARCH} STREQUAL "x86_64")
	add_compile_options(-mcmodel=large -mno-red-zone -mno-sse)
endif()

if (${ARCH} STREQUAL "arm64")
	add_compile_options(-mgeneral-regs-only)
endif()

set(MCKERNEL_SRCS
	init.c mem.c debug.c mikc.c listeners.c ap.c syscall.c cls.c host.c process.c
	copy.c waitq.c futex.c timer.c plist.c fileobj.c shmobj.c zeroobj.c
	procfs.c devobj.c sysfs.c xpmem.c profile.c freeze.c rbtree.c pager.c
	gencore.c hugefileobj.c llist.c

	${IHK_FULL_SOURCE_DIR}/ikc/manycore.c
	${IHK_FULL_SOURCE_DIR}/ikc/master.c
	${IHK_FULL_SOURCE_DIR}/ikc/queue.c

	${PROJECT_SOURCE_DIR}/lib/abort.c
	${PROJECT_SOURCE_DIR}/lib/bitmap.c
	${PROJECT_SOURCE_DIR}/lib/bitops.c
	${PROJECT_SOURCE_DIR}/lib/page_alloc.c
	${PROJECT_SOURCE_DIR}/lib/string.c
	${PROJECT_SOURCE_DIR}/lib/vsprintf.c

	${IHK_FULL_SOURCE_DIR}/cokernel/smp/ikc.c
	${IHK_FULL_SOURCE_DIR}/cokernel/smp/${ARCH}/dma.c
	${IHK_FULL_SOURCE_DIR}/cokernel/smp/${ARCH}/setup.c
)

if (ENABLE_TOFU)
	list(APPEND MCKERNEL_SRCS
		tofu/tof_utofu_main.c
	)
endif()

if (ENABLE_UBSAN)
	add_compile_options(-fsanitize=undefined)
	list(APPEND MCKERNEL_SRCS ubsan.c)
endif(ENABLE_UBSAN)

if (BUILD_TARGET STREQUAL "smp-x86")
	list(APPEND MCKERNEL_SRCS
		${PROJECT_SOURCE_DIR}/arch/${ARCH}/kernel/context.S
		${PROJECT_SOURCE_DIR}/arch/${ARCH}/kernel/coredump.c
		${PROJECT_SOURCE_DIR}/arch/${ARCH}/kernel/cpu.c
		${PROJECT_SOURCE_DIR}/arch/${ARCH}/kernel/interrupt.S
		${PROJECT_SOURCE_DIR}/arch/${ARCH}/kernel/local.c
		${PROJECT_SOURCE_DIR}/arch/${ARCH}/kernel/memory.c
		${PROJECT_SOURCE_DIR}/arch/${ARCH}/kernel/mikc.c
		${PROJECT_SOURCE_DIR}/arch/${ARCH}/kernel/perfctr.c
		${PROJECT_SOURCE_DIR}/arch/${ARCH}/kernel/syscall.c
		${PROJECT_SOURCE_DIR}/arch/${ARCH}/kernel/trampoline.S
		${PROJECT_SOURCE_DIR}/arch/${ARCH}/kernel/vsyscall.c

	)
	set(LINKER_SCRIPT "smp-x86.lds")
elseif (BUILD_TARGET STREQUAL "smp-arm64")

	configure_file(${KERNEL_DIR}/include/generated/vdso-offsets.h include/vdso-offsets.h)

	list(APPEND MCKERNEL_SRCS
		${PROJECT_SOURCE_DIR}/arch/${ARCH}/kernel/assert.c
		${PROJECT_SOURCE_DIR}/arch/${ARCH}/kernel/cache.S
		${PROJECT_SOURCE_DIR}/arch/${ARCH}/kernel/context.c
		${PROJECT_SOURCE_DIR}/arch/${ARCH}/kernel/coredump.c
		${PROJECT_SOURCE_DIR}/arch/${ARCH}/kernel/cpu.c
		${PROJECT_SOURCE_DIR}/arch/${ARCH}/kernel/cpufeature.c
		${PROJECT_SOURCE_DIR}/arch/${ARCH}/kernel/cputable.c
		${PROJECT_SOURCE_DIR}/arch/${ARCH}/kernel/debug-monitors.c
		${PROJECT_SOURCE_DIR}/arch/${ARCH}/kernel/entry-fpsimd.S
		${PROJECT_SOURCE_DIR}/arch/${ARCH}/kernel/entry.S
		${PROJECT_SOURCE_DIR}/arch/${ARCH}/kernel/fault.c
		${PROJECT_SOURCE_DIR}/arch/${ARCH}/kernel/fpsimd.c
		${PROJECT_SOURCE_DIR}/arch/${ARCH}/kernel/head.S
		${PROJECT_SOURCE_DIR}/arch/${ARCH}/kernel/hw_breakpoint.c
		${PROJECT_SOURCE_DIR}/arch/${ARCH}/kernel/hyp-stub.S
		${PROJECT_SOURCE_DIR}/arch/${ARCH}/kernel/imp-sysreg.c
		${PROJECT_SOURCE_DIR}/arch/${ARCH}/kernel/irq-gic-v2.c
		${PROJECT_SOURCE_DIR}/arch/${ARCH}/kernel/irq-gic-v3.c
		${PROJECT_SOURCE_DIR}/arch/${ARCH}/kernel/local.c
		${PROJECT_SOURCE_DIR}/arch/${ARCH}/kernel/memcpy.S
		${PROJECT_SOURCE_DIR}/arch/${ARCH}/kernel/memory.c
		${PROJECT_SOURCE_DIR}/arch/${ARCH}/kernel/memset.S
		${PROJECT_SOURCE_DIR}/arch/${ARCH}/kernel/mikc.c
		${PROJECT_SOURCE_DIR}/arch/${ARCH}/kernel/perfctr.c
		${PROJECT_SOURCE_DIR}/arch/${ARCH}/kernel/perfctr_armv8pmu.c
		${PROJECT_SOURCE_DIR}/arch/${ARCH}/kernel/proc-macros.S
		${PROJECT_SOURCE_DIR}/arch/${ARCH}/kernel/proc.S
		${PROJECT_SOURCE_DIR}/arch/${ARCH}/kernel/psci.c
		${PROJECT_SOURCE_DIR}/arch/${ARCH}/kernel/ptrace.c
		${PROJECT_SOURCE_DIR}/arch/${ARCH}/kernel/smp.c
		${PROJECT_SOURCE_DIR}/arch/${ARCH}/kernel/syscall.c
		${PROJECT_SOURCE_DIR}/arch/${ARCH}/kernel/timer.c
		${PROJECT_SOURCE_DIR}/arch/${ARCH}/kernel/trampoline.S
		${PROJECT_SOURCE_DIR}/arch/${ARCH}/kernel/traps.c
		${PROJECT_SOURCE_DIR}/arch/${ARCH}/kernel/vdso.c

	)

	execute_process(COMMAND awk -F= "$1 == \"CONFIG_NR_CPUS\" { print $2; exit; }" "${KERNEL_DIR}/.config"
			OUTPUT_VARIABLE CONFIG_NR_CPUS OUTPUT_STRIP_TRAILING_WHITESPACE)
	execute_process(COMMAND awk -F= "$1 == \"CONFIG_ARM_ARCH_TIMER_EVTSTREAM\" { print $2; exit; }" "${KERNEL_DIR}/.config"
			OUTPUT_VARIABLE CONFIG_ARM_ARCH_TIMER_EVTSTREAM OUTPUT_STRIP_TRAILING_WHITESPACE)
	execute_process(COMMAND awk -F= "$1 == \"CONFIG_HZ\" { print $2; exit; }" "${KERNEL_DIR}/.config"
			OUTPUT_VARIABLE CONFIG_HZ OUTPUT_STRIP_TRAILING_WHITESPACE)
	execute_process(COMMAND awk -F= "$1 == \"CONFIG_ARM64_VHE\" { print $2; exit; }" "${KERNEL_DIR}/.config"
			OUTPUT_VARIABLE CONFIG_ARM64_VHE OUTPUT_STRIP_TRAILING_WHITESPACE)
	execute_process(COMMAND awk -F= "$1 == \"CONFIG_ARM_GIC_V3\" { print $2; exit; }" "${KERNEL_DIR}/.config"
			OUTPUT_VARIABLE CONFIG_ARM_GIC_V3 OUTPUT_STRIP_TRAILING_WHITESPACE)
	execute_process(COMMAND bash -c "gawk '/CPU implementer/ { print \$4; exit; }' /proc/cpuinfo"
			OUTPUT_VARIABLE CPU_IMPLEMENTER OUTPUT_STRIP_TRAILING_WHITESPACE)
	execute_process(COMMAND bash -c "gawk '/CPU architecture/ { print \$3; exit; }' /proc/cpuinfo"
			OUTPUT_VARIABLE CPU_ARCH OUTPUT_STRIP_TRAILING_WHITESPACE)
	execute_process(COMMAND bash -c "gawk '/CPU variant/ { print \$4; exit; }' /proc/cpuinfo"
			OUTPUT_VARIABLE CPU_VARIANT OUTPUT_STRIP_TRAILING_WHITESPACE)
	execute_process(COMMAND bash -c "gawk '/CPU part/ { print \$4; exit; }' /proc/cpuinfo"
			OUTPUT_VARIABLE CPU_PART OUTPUT_STRIP_TRAILING_WHITESPACE)

	message("Host kernel CONFIG_NR_CPUS=${CONFIG_NR_CPUS}")
	message("Host kernel CONFIG_HZ=${CONFIG_HZ}")

	if(CONFIG_ARM_GIC_V3 STREQUAL "y")
		add_definitions(-DCONFIG_ARM_GIC_V3=y)
		# NMI by priority doesn't work with ThunderX2
		if(CPU_IMPLEMENTER STREQUAL "0x43" AND CPU_ARCH STREQUAL "8" AND
		   CPU_VARIANT STREQUAL "0x1" AND CPU_PART STREQUAL "0x0af")
			# Don't add "-DCONFIG_HAS_NMI=n" because it'll be added to KBUILD_C_FLAGS
			message("CONFIG_HAS_NMI isn't defined for ThunderX2")
		else()
			add_definitions(-DCONFIG_HAS_NMI=y)
			message("CONFIG_HAS_NMI is defined")
		endif()
	else(CONFIG_ARM_GIC_V3 STREQUAL "y")
		message(FATAL_ERROR "Host kernel must have GIC v3 enabled")
	endif(CONFIG_ARM_GIC_V3 STREQUAL "y")
	if(CONFIG_ARM64_VHE STREQUAL "y")
		add_definitions(-DCONFIG_ARM64_VHE)
	endif(CONFIG_ARM64_VHE STREQUAL "y")
	if(CONFIG_ARM_ARCH_TIMER_EVTSTREAM STREQUAL "y")
		add_definitions(-DCONFIG_ARM_ARCH_TIMER_EVTSTREAM)
	endif(CONFIG_ARM_ARCH_TIMER_EVTSTREAM STREQUAL "y")
	add_definitions(-DNR_CPUS=${CONFIG_NR_CPUS} -DCONFIG_HZ=${CONFIG_HZ})
	# Seems to have been hardcoded to 512 in old makefiles
	add_definitions(-DCONFIG_SMP_MAX_CORES=512)
	# Always turned on as well
	add_definitions(-DCONFIG_ARM64_SVE)
endif()

configure_file(
  ${CMAKE_CURRENT_SOURCE_DIR}/config/${LINKER_SCRIPT}.in
  ${CMAKE_CURRENT_BINARY_DIR}/config/${LINKER_SCRIPT}
  @ONLY
  )

add_executable(mckernel.img ${MCKERNEL_SRCS})

set_target_properties(mckernel.img PROPERTIES INSTALL_RPATH "")
set_target_properties(mckernel.img PROPERTIES LINK_FLAGS
	"-e arch_start -T ${CMAKE_CURRENT_BINARY_DIR}/config/${LINKER_SCRIPT} --build-id")

install(TARGETS "mckernel.img"
	DESTINATION "${MCKERNELDIR}")