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Commit | Line | Data |
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39f0e5f8 WD |
1 | # |
2 | # (C) Copyright 2000-2002 | |
3 | # Wolfgang Denk, DENX Software Engineering, wd@denx.de. | |
4 | # | |
1a459660 | 5 | # SPDX-License-Identifier: GPL-2.0+ |
39f0e5f8 WD |
6 | # |
7 | ||
1ea6bcd8 MF |
8 | CROSS_COMPILE ?= arm-linux- |
9 | ||
8ae86b76 | 10 | ifndef CONFIG_STANDALONE_LOAD_ADDR |
806d2792 | 11 | ifneq ($(CONFIG_OMAP_COMMON),) |
8ae86b76 | 12 | CONFIG_STANDALONE_LOAD_ADDR = 0x80300000 |
262ae0a6 | 13 | else |
8ae86b76 | 14 | CONFIG_STANDALONE_LOAD_ADDR = 0xc100000 |
262ae0a6 MF |
15 | endif |
16 | endif | |
17 | ||
fd725691 | 18 | LDFLAGS_FINAL += --gc-sections |
3102274d MY |
19 | PLATFORM_RELFLAGS += -ffunction-sections -fdata-sections \ |
20 | -fno-common -ffixed-r8 -msoft-float | |
fd725691 | 21 | |
959daa21 SG |
22 | # Support generic board on ARM |
23 | __HAVE_ARCH_GENERIC_BOARD := y | |
24 | ||
39f0e5f8 | 25 | PLATFORM_CPPFLAGS += -DCONFIG_ARM -D__ARM__ |
10a451cd | 26 | |
5356f545 A |
27 | # Choose between ARM/Thumb instruction sets |
28 | ifeq ($(CONFIG_SYS_THUMB_BUILD),y) | |
29 | PF_CPPFLAGS_ARM := $(call cc-option, -mthumb -mthumb-interwork,\ | |
30 | $(call cc-option,-marm,)\ | |
31 | $(call cc-option,-mno-thumb-interwork,)\ | |
32 | ) | |
33 | else | |
34 | PF_CPPFLAGS_ARM := $(call cc-option,-marm,) \ | |
35 | $(call cc-option,-mno-thumb-interwork,) | |
36 | endif | |
f772acf8 | 37 | |
06a119a0 TR |
38 | # Only test once |
39 | ifneq ($(CONFIG_SPL_BUILD),y) | |
40 | ALL-$(CONFIG_SYS_THUMB_BUILD) += checkthumb | |
41 | endif | |
42 | ||
f772acf8 WD |
43 | # Try if EABI is supported, else fall back to old API, |
44 | # i. e. for example: | |
45 | # - with ELDK 4.2 (EABI supported), use: | |
5356f545 | 46 | # -mabi=aapcs-linux |
f772acf8 | 47 | # - with ELDK 4.1 (gcc 4.x, no EABI), use: |
5356f545 | 48 | # -mabi=apcs-gnu |
f772acf8 | 49 | # - with ELDK 3.1 (gcc 3.x), use: |
5356f545 | 50 | # -mapcs-32 |
cca4e4ae | 51 | PF_CPPFLAGS_ABI := $(call cc-option,\ |
5356f545 | 52 | -mabi=aapcs-linux,\ |
cca4e4ae WD |
53 | $(call cc-option,\ |
54 | -mapcs-32,\ | |
f772acf8 | 55 | $(call cc-option,\ |
cca4e4ae WD |
56 | -mabi=apcs-gnu,\ |
57 | )\ | |
5356f545 | 58 | )\ |
cca4e4ae WD |
59 | ) |
60 | PLATFORM_CPPFLAGS += $(PF_CPPFLAGS_ARM) $(PF_CPPFLAGS_ABI) | |
f772acf8 WD |
61 | |
62 | # For EABI, make sure to provide raise() | |
63 | ifneq (,$(findstring -mabi=aapcs-linux,$(PLATFORM_CPPFLAGS))) | |
5253418a A |
64 | # This file is parsed many times, so the string may get added multiple |
65 | # times. Also, the prefix needs to be different based on whether | |
66 | # CONFIG_SPL_BUILD is defined or not. 'filter-out' the existing entry | |
67 | # before adding the correct one. | |
68 | ifdef CONFIG_SPL_BUILD | |
69 | PLATFORM_LIBS := $(SPLTREE)/arch/arm/lib/eabi_compat.o \ | |
70 | $(filter-out %/arch/arm/lib/eabi_compat.o, $(PLATFORM_LIBS)) | |
71 | else | |
72 | PLATFORM_LIBS := $(OBJTREE)/arch/arm/lib/eabi_compat.o \ | |
73 | $(filter-out %/arch/arm/lib/eabi_compat.o, $(PLATFORM_LIBS)) | |
f772acf8 WD |
74 | endif |
75 | endif | |
92d5ecba | 76 | |
92d5ecba | 77 | # needed for relocation |
a4594e41 | 78 | LDFLAGS_u-boot += -pie |
0f20bb60 AM |
79 | |
80 | # | |
81 | # FIXME: binutils versions < 2.22 have a bug in the assembler where | |
82 | # branches to weak symbols can be incorrectly optimized in thumb mode | |
83 | # to a short branch (b.n instruction) that won't reach when the symbol | |
84 | # gets preempted | |
85 | # | |
86 | # http://sourceware.org/bugzilla/show_bug.cgi?id=12532 | |
87 | # | |
88 | ifeq ($(CONFIG_SYS_THUMB_BUILD),y) | |
89 | ifeq ($(GAS_BUG_12532),) | |
90 | export GAS_BUG_12532:=$(shell if [ $(call binutils-version) -lt 0222 ] ; \ | |
91 | then echo y; else echo n; fi) | |
92 | endif | |
93 | ifeq ($(GAS_BUG_12532),y) | |
94 | PLATFORM_RELFLAGS += -fno-optimize-sibling-calls | |
95 | endif | |
96 | endif | |
c37980c3 | 97 | |
c37980c3 | 98 | ifneq ($(CONFIG_SPL_BUILD),y) |
373d7983 JH |
99 | # Check that only R_ARM_RELATIVE relocations are generated. |
100 | ALL-y += checkarmreloc | |
101 | # The movt / movw can hardcode 16 bit parts of the addresses in the | |
102 | # instruction. Relocation is not supported for that case, so disable | |
103 | # such usage by requiring word relocations. | |
104 | PLATFORM_CPPFLAGS += $(call cc-option, -mword-relocations) | |
c37980c3 | 105 | endif |