1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
|
#
# (C) Copyright 2000-2002
# Wolfgang Denk, DENX Software Engineering, wd@denx.de.
#
# SPDX-License-Identifier: GPL-2.0+
#
ifndef CONFIG_STANDALONE_LOAD_ADDR
ifneq ($(CONFIG_ARCH_OMAP2PLUS),)
CONFIG_STANDALONE_LOAD_ADDR = 0x80300000
else
CONFIG_STANDALONE_LOAD_ADDR = 0xc100000
endif
endif
CFLAGS_NON_EFI := -fno-pic -ffixed-r9 -ffunction-sections -fdata-sections
CFLAGS_EFI := -fpic -fshort-wchar
LDFLAGS_FINAL += --gc-sections
PLATFORM_RELFLAGS += -ffunction-sections -fdata-sections \
-fno-common -ffixed-r9
PLATFORM_RELFLAGS += $(call cc-option, -msoft-float) \
$(call cc-option,-mshort-load-bytes,$(call cc-option,-malignment-traps,))
# LLVM support
LLVMS_RELFLAGS := $(call cc-option,-mllvm,) \
$(call cc-option,-target arm-none-eabi,) \
$(call cc-option,-arm-use-movt=0,)
PLATFORM_RELFLAGS += $(LLVM_RELFLAGS)
PLATFORM_CPPFLAGS += -D__ARM__
ifdef CONFIG_ARM64
PLATFORM_ELFFLAGS += -B aarch64 -O elf64-littleaarch64
else
PLATFORM_ELFFLAGS += -B arm -O elf32-littlearm
endif
# Choose between ARM/Thumb instruction sets
ifeq ($(CONFIG_$(SPL_)SYS_THUMB_BUILD),y)
AFLAGS_IMPLICIT_IT := $(call as-option,-Wa$(comma)-mimplicit-it=always)
PF_CPPFLAGS_ARM := $(AFLAGS_IMPLICIT_IT) \
$(call cc-option, -mthumb -mthumb-interwork,\
$(call cc-option,-marm,)\
$(call cc-option,-mno-thumb-interwork,)\
)
else
PF_CPPFLAGS_ARM := $(call cc-option,-marm,) \
$(call cc-option,-mno-thumb-interwork,)
endif
# Only test once
ifeq ($(CONFIG_$(SPL_)SYS_THUMB_BUILD),y)
archprepare: checkthumb checkgcc6
checkthumb:
@if test "$(call cc-name)" = "gcc" -a \
"$(call cc-version)" -lt "0404"; then \
echo -n '*** Your GCC does not produce working '; \
echo 'binaries in THUMB mode.'; \
echo '*** Your board is configured for THUMB mode.'; \
false; \
fi
else
archprepare: checkgcc6
endif
checkgcc6:
@if test "$(call cc-name)" = "gcc" -a \
"$(call cc-version)" -lt "0600"; then \
echo -n '*** Your GCC is older than 6.0 and will not be '; \
echo 'supported starting in v2018.01.'; \
fi
# Try if EABI is supported, else fall back to old API,
# i. e. for example:
# - with ELDK 4.2 (EABI supported), use:
# -mabi=aapcs-linux
# - with ELDK 4.1 (gcc 4.x, no EABI), use:
# -mabi=apcs-gnu
# - with ELDK 3.1 (gcc 3.x), use:
# -mapcs-32
PF_CPPFLAGS_ABI := $(call cc-option,\
-mabi=aapcs-linux,\
$(call cc-option,\
-mapcs-32,\
$(call cc-option,\
-mabi=apcs-gnu,\
)\
)\
)
PLATFORM_CPPFLAGS += $(PF_CPPFLAGS_ARM) $(PF_CPPFLAGS_ABI)
# For EABI, make sure to provide raise()
ifneq (,$(findstring -mabi=aapcs-linux,$(PLATFORM_CPPFLAGS)))
# This file is parsed many times, so the string may get added multiple
# times. Also, the prefix needs to be different based on whether
# CONFIG_SPL_BUILD is defined or not. 'filter-out' the existing entry
# before adding the correct one.
PLATFORM_LIBS := arch/arm/lib/eabi_compat.o \
$(filter-out arch/arm/lib/eabi_compat.o, $(PLATFORM_LIBS))
endif
# needed for relocation
LDFLAGS_u-boot += -pie
#
# FIXME: binutils versions < 2.22 have a bug in the assembler where
# branches to weak symbols can be incorrectly optimized in thumb mode
# to a short branch (b.n instruction) that won't reach when the symbol
# gets preempted
#
# http://sourceware.org/bugzilla/show_bug.cgi?id=12532
#
ifeq ($(CONFIG_$(SPL_)SYS_THUMB_BUILD),y)
ifeq ($(GAS_BUG_12532),)
export GAS_BUG_12532:=$(shell if [ $(call binutils-version) -lt 0222 ] ; \
then echo y; else echo n; fi)
endif
ifeq ($(GAS_BUG_12532),y)
PLATFORM_RELFLAGS += -fno-optimize-sibling-calls
endif
endif
ifneq ($(CONFIG_SPL_BUILD),y)
# Check that only R_ARM_RELATIVE relocations are generated.
ALL-y += checkarmreloc
# The movt / movw can hardcode 16 bit parts of the addresses in the
# instruction. Relocation is not supported for that case, so disable
# such usage by requiring word relocations.
PLATFORM_CPPFLAGS += $(call cc-option, -mword-relocations)
PLATFORM_CPPFLAGS += $(call cc-option, -fno-pic)
endif
# limit ourselves to the sections we want in the .bin.
ifdef CONFIG_ARM64
OBJCOPYFLAGS += -j .text -j .secure_text -j .secure_data -j .rodata -j .data \
-j .u_boot_list -j .rela.dyn -j .got -j .got.plt
else
OBJCOPYFLAGS += -j .text -j .secure_text -j .secure_data -j .rodata -j .hash \
-j .data -j .got -j .got.plt -j .u_boot_list -j .rel.dyn
endif
# if a dtb section exists we always have to include it
# there are only two cases where it is generated
# 1) OF_EMBEDED is turned on
# 2) unit tests include device tree blobs
OBJCOPYFLAGS += -j .dtb.init.rodata
ifdef CONFIG_EFI_LOADER
OBJCOPYFLAGS += -j .efi_runtime -j .efi_runtime_rel
endif
ifneq ($(CONFIG_IMX_CONFIG),)
ifdef CONFIG_SPL
ifndef CONFIG_SPL_BUILD
ALL-y += SPL
endif
else
ifeq ($(CONFIG_OF_SEPARATE),y)
ALL-y += u-boot-dtb.imx
else
ALL-y += u-boot.imx
endif
endif
ifneq ($(CONFIG_VF610),)
ALL-y += u-boot.vyb
endif
endif
EFI_LDS := elf_arm_efi.lds
EFI_CRT0 := crt0_arm_efi.o
EFI_RELOC := reloc_arm_efi.o
|
