1# SPDX-License-Identifier: GPL-2.0 2# Makefile for the Hexagon arch 3 4KBUILD_DEFCONFIG = comet_defconfig 5 6# Do not use GP-relative jumps 7KBUILD_CFLAGS += -G0 8LDFLAGS_vmlinux += -G0 9 10# Do not use single-byte enums; these will overflow. 11KBUILD_CFLAGS += -fno-short-enums 12 13# We must use long-calls: 14KBUILD_CFLAGS += -mlong-calls 15 16# Modules must use either long-calls, or use pic/plt. 17# Use long-calls for now, it's easier. And faster. 18# KBUILD_CFLAGS_MODULE += -fPIC 19# KBUILD_LDFLAGS_MODULE += -shared 20KBUILD_CFLAGS_MODULE += -mlong-calls 21 22cflags-y += $(call cc-option,-mv${CONFIG_HEXAGON_ARCH_VERSION}) 23aflags-y += $(call cc-option,-mv${CONFIG_HEXAGON_ARCH_VERSION}) 24ldflags-y += $(call cc-option,-mv${CONFIG_HEXAGON_ARCH_VERSION}) 25 26KBUILD_CFLAGS += $(cflags-y) 27KBUILD_AFLAGS += $(aflags-y) 28KBUILD_LDFLAGS += $(ldflags-y) 29 30# Thread-info register will be r19. This value is not configureable; 31# it is hard-coded in several files. 32TIR_NAME := r19 33KBUILD_CFLAGS += -ffixed-$(TIR_NAME) -DTHREADINFO_REG=$(TIR_NAME) -D__linux__ 34KBUILD_AFLAGS += -DTHREADINFO_REG=$(TIR_NAME) 35 36head-y := arch/hexagon/kernel/head.o 37