CC = ${CROSS_COMPILE}gcc
LD = ${CROSS_COMPILE}ld
OBJDUMP = ${CROSS_COMPILE}objdump
OBJCOPY = ${CROSS_COMPILE}objcopy

#  ARM64_MEMORY_LAYOUT
#  ----+-----------+-----------------------
#    # | page size | virtual memory space
#  ----+-----------+-----------------------
#    1 |       4KB |  39bit [linux-linaro-tracking, upstream kernel]
#    2 |       4KB |  48bit
#    3 |      64KB |  42bit [CentOS]
#    4 |      64KB |  48bit
#  ----+-----------+-----------------------
HOST_DIR=@KDIR@
HOST_CONFIG=$(HOST_DIR)/.config
HOST_KERNEL_CONFIG_ARM64_64K_PAGES=$(shell grep -E "^CONFIG_ARM64_64K_PAGES=y" $(HOST_CONFIG) | sed 's|CONFIG_ARM64_64K_PAGES=||g')
HOST_KERNEL_CONFIG_ARM64_VA_BITS=$(shell grep -E "^CONFIG_ARM64_VA_BITS=" $(HOST_CONFIG) | sed 's|CONFIG_ARM64_VA_BITS=||g')

ifeq ($(HOST_KERNEL_CONFIG_ARM64_64K_PAGES), y)
 ifeq ($(HOST_KERNEL_CONFIG_ARM64_VA_BITS), 42)
  $(info PAGE_SIZE:64KB VA_BITS:42 PGTABLE_LEVELS:2)
  ARM64_MEMORY_LAYOUT=3
 else
  $(info PAGE_SIZE:64KB VA_BITS:48, PGTABLE_LEVELS:3)
  ARM64_MEMORY_LAYOUT=4
 endif
else
 ifeq ($(HOST_KERNEL_CONFIG_ARM64_VA_BITS), 39)
  $(info PAGE_SIZE:4KB VA_BITS:39 PGTABLE_LEVELS:3)
  ARM64_MEMORY_LAYOUT=1
 else
  $(info PAGE_SIZE:4KB VA_BITS:48 PGTABLE_LEVELS:4)
  ARM64_MEMORY_LAYOUT=2
 endif
endif

$(info linker script:smp-arm64_type$(ARM64_MEMORY_LAYOUT).lds)
LDFLAGS += -T $(SRC)/config/smp-arm64_type$(ARM64_MEMORY_LAYOUT).lds