1# SPDX-License-Identifier: GPL-2.0+
2#
3# (C) Copyright 2000-2002
4# Wolfgang Denk, DENX Software Engineering, wd@denx.de.
5
6ifndef CONFIG_STANDALONE_LOAD_ADDR
7ifneq ($(CONFIG_ARCH_OMAP2PLUS),)
8CONFIG_STANDALONE_LOAD_ADDR = 0x80300000
9else
10CONFIG_STANDALONE_LOAD_ADDR = 0xc100000
11endif
12endif
13
14CFLAGS_NON_EFI := -fno-pic -ffixed-r9 -ffunction-sections -fdata-sections \
15		  -fstack-protector-strong
16CFLAGS_EFI := -fpic -fshort-wchar
17
18ifneq ($(CONFIG_LTO)$(CONFIG_USE_PRIVATE_LIBGCC),yy)
19LDFLAGS_FINAL += --gc-sections
20endif
21
22ifndef CONFIG_LTO
23PLATFORM_RELFLAGS += -ffunction-sections -fdata-sections
24endif
25
26PLATFORM_RELFLAGS += -fno-common -ffixed-r9
27PLATFORM_RELFLAGS += $(call cc-option, -msoft-float) \
28      $(call cc-option,-mshort-load-bytes,$(call cc-option,-malignment-traps,))
29
30# LLVM support
31LLVM_RELFLAGS		:= $(call cc-option,-mllvm,) \
32			$(call cc-option,-mno-movt,)
33PLATFORM_RELFLAGS	+= $(LLVM_RELFLAGS)
34
35PLATFORM_CPPFLAGS += -D__ARM__
36
37ifdef CONFIG_ARM64
38PLATFORM_ELFFLAGS += -B aarch64 -O elf64-littleaarch64
39else
40PLATFORM_ELFFLAGS += -B arm -O elf32-littlearm
41endif
42
43# Choose between ARM/Thumb instruction sets
44ifeq ($(CONFIG_$(SPL_)SYS_THUMB_BUILD),y)
45AFLAGS_IMPLICIT_IT	:= $(call as-option,-Wa$(comma)-mimplicit-it=always)
46PF_CPPFLAGS_ARM		:= $(AFLAGS_IMPLICIT_IT) \
47			$(call cc-option, -mthumb -mthumb-interwork,\
48			$(call cc-option,-marm,)\
49			$(call cc-option,-mno-thumb-interwork,)\
50		)
51else
52PF_CPPFLAGS_ARM := $(call cc-option,-marm,) \
53		$(call cc-option,-mno-thumb-interwork,)
54endif
55
56# Only test once
57ifeq ($(CONFIG_$(SPL_)SYS_THUMB_BUILD),y)
58archprepare: checkthumb checkgcc6
59
60checkthumb:
61	@if test "$(call cc-name)" = "gcc" -a \
62			"$(call cc-version)" -lt "0404"; then \
63		echo -n '*** Your GCC does not produce working '; \
64		echo 'binaries in THUMB mode.'; \
65		echo '*** Your board is configured for THUMB mode.'; \
66		false; \
67	fi
68else
69archprepare: checkgcc6
70endif
71
72checkgcc6:
73	@if test "$(call cc-name)" = "gcc" -a \
74			"$(call cc-version)" -lt "0600"; then \
75		echo '*** Your GCC is older than 6.0 and is not supported'; \
76		false; \
77	fi
78
79
80# Try if EABI is supported, else fall back to old API,
81# i. e. for example:
82# - with ELDK 4.2 (EABI supported), use:
83#	-mabi=aapcs-linux
84# - with ELDK 4.1 (gcc 4.x, no EABI), use:
85#	-mabi=apcs-gnu
86# - with ELDK 3.1 (gcc 3.x), use:
87#	-mapcs-32
88PF_CPPFLAGS_ABI := $(call cc-option,\
89			-mabi=aapcs-linux,\
90			$(call cc-option,\
91				-mapcs-32,\
92				$(call cc-option,\
93					-mabi=apcs-gnu,\
94				)\
95			)\
96		)
97PLATFORM_CPPFLAGS += $(PF_CPPFLAGS_ARM) $(PF_CPPFLAGS_ABI)
98
99# For EABI, make sure to provide raise()
100ifneq (,$(findstring -mabi=aapcs-linux,$(PLATFORM_CPPFLAGS)))
101# This file is parsed many times, so the string may get added multiple
102# times. Also, the prefix needs to be different based on whether
103# CONFIG_SPL_BUILD is defined or not. 'filter-out' the existing entry
104# before adding the correct one.
105PLATFORM_LIBS := arch/arm/lib/eabi_compat.o \
106	$(filter-out arch/arm/lib/eabi_compat.o, $(PLATFORM_LIBS))
107endif
108
109# needed for relocation
110LDFLAGS_u-boot += -pie
111
112#
113# FIXME: binutils versions < 2.22 have a bug in the assembler where
114# branches to weak symbols can be incorrectly optimized in thumb mode
115# to a short branch (b.n instruction) that won't reach when the symbol
116# gets preempted
117#
118# http://sourceware.org/bugzilla/show_bug.cgi?id=12532
119#
120ifeq ($(CONFIG_$(SPL_)SYS_THUMB_BUILD),y)
121ifeq ($(GAS_BUG_12532),)
122export GAS_BUG_12532:=$(shell if [ $(call binutils-version) -lt 0222 ] ; \
123	then echo y; else echo n; fi)
124endif
125ifeq ($(GAS_BUG_12532),y)
126PLATFORM_RELFLAGS += -fno-optimize-sibling-calls
127endif
128endif
129
130ifneq ($(CONFIG_SPL_BUILD),y)
131# Check that only R_ARM_RELATIVE relocations are generated.
132INPUTS-y += checkarmreloc
133# The movt / movw can hardcode 16 bit parts of the addresses in the
134# instruction. Relocation is not supported for that case, so disable
135# such usage by requiring word relocations.
136PLATFORM_CPPFLAGS += $(call cc-option, -mword-relocations)
137PLATFORM_CPPFLAGS += $(call cc-option, -fno-pic)
138endif
139
140# limit ourselves to the sections we want in the .bin.
141ifdef CONFIG_ARM64
142OBJCOPYFLAGS += -j .text -j .secure_text -j .secure_data -j .rodata -j .data \
143		-j .u_boot_list -j .rela.dyn -j .got -j .got.plt \
144		-j .binman_sym_table -j .text_rest
145else
146OBJCOPYFLAGS += -j .text -j .secure_text -j .secure_data -j .rodata -j .hash \
147		-j .data -j .got -j .got.plt -j .u_boot_list -j .rel.dyn \
148		-j .binman_sym_table -j .text_rest
149endif
150
151# if a dtb section exists we always have to include it
152# there are only two cases where it is generated
153# 1) OF_EMBEDED is turned on
154# 2) unit tests include device tree blobs
155OBJCOPYFLAGS += -j .dtb.init.rodata
156
157ifdef CONFIG_EFI_LOADER
158OBJCOPYFLAGS += -j .efi_runtime -j .efi_runtime_rel
159endif
160
161ifneq ($(CONFIG_IMX_CONFIG),)
162ifdef CONFIG_SPL
163ifndef CONFIG_SPL_BUILD
164INPUTS-y += SPL
165endif
166else
167ifeq ($(CONFIG_OF_SEPARATE),y)
168INPUTS-y += u-boot-dtb.imx
169else
170INPUTS-y += u-boot.imx
171endif
172endif
173ifneq ($(CONFIG_VF610),)
174INPUTS-y += u-boot.vyb
175endif
176endif
177
178EFI_LDS := elf_arm_efi.lds
179EFI_CRT0 := crt0_arm_efi.o
180EFI_RELOC := reloc_arm_efi.o
181