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39f0e5f8 WD |
1 | # |
2 | # (C) Copyright 2000-2002 | |
3 | # Wolfgang Denk, DENX Software Engineering, wd@denx.de. | |
4 | # | |
5 | # See file CREDITS for list of people who contributed to this | |
6 | # project. | |
7 | # | |
8 | # This program is free software; you can redistribute it and/or | |
9 | # modify it under the terms of the GNU General Public License as | |
10 | # published by the Free Software Foundation; either version 2 of | |
11 | # the License, or (at your option) any later version. | |
12 | # | |
13 | # This program is distributed in the hope that it will be useful, | |
14 | # but WITHOUT ANY WARRANTY; without even the implied warranty of | |
15 | # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
16 | # GNU General Public License for more details. | |
17 | # | |
18 | # You should have received a copy of the GNU General Public License | |
19 | # along with this program; if not, write to the Free Software | |
20 | # Foundation, Inc., 59 Temple Place, Suite 330, Boston, | |
21 | # MA 02111-1307 USA | |
22 | # | |
23 | ||
1ea6bcd8 MF |
24 | CROSS_COMPILE ?= arm-linux- |
25 | ||
8ae86b76 | 26 | ifndef CONFIG_STANDALONE_LOAD_ADDR |
bd380cf4 | 27 | ifneq ($(CONFIG_AM33XX)$(CONFIG_OMAP34XX)$(CONFIG_OMAP44XX)$(CONFIG_OMAP54XX)$(CONFIG_TI814X),) |
8ae86b76 | 28 | CONFIG_STANDALONE_LOAD_ADDR = 0x80300000 |
262ae0a6 | 29 | else |
8ae86b76 | 30 | CONFIG_STANDALONE_LOAD_ADDR = 0xc100000 |
262ae0a6 MF |
31 | endif |
32 | endif | |
33 | ||
959daa21 SG |
34 | # Support generic board on ARM |
35 | __HAVE_ARCH_GENERIC_BOARD := y | |
36 | ||
39f0e5f8 | 37 | PLATFORM_CPPFLAGS += -DCONFIG_ARM -D__ARM__ |
10a451cd | 38 | |
5356f545 A |
39 | # Choose between ARM/Thumb instruction sets |
40 | ifeq ($(CONFIG_SYS_THUMB_BUILD),y) | |
41 | PF_CPPFLAGS_ARM := $(call cc-option, -mthumb -mthumb-interwork,\ | |
42 | $(call cc-option,-marm,)\ | |
43 | $(call cc-option,-mno-thumb-interwork,)\ | |
44 | ) | |
45 | else | |
46 | PF_CPPFLAGS_ARM := $(call cc-option,-marm,) \ | |
47 | $(call cc-option,-mno-thumb-interwork,) | |
48 | endif | |
f772acf8 | 49 | |
06a119a0 TR |
50 | # Only test once |
51 | ifneq ($(CONFIG_SPL_BUILD),y) | |
52 | ALL-$(CONFIG_SYS_THUMB_BUILD) += checkthumb | |
53 | endif | |
54 | ||
f772acf8 WD |
55 | # Try if EABI is supported, else fall back to old API, |
56 | # i. e. for example: | |
57 | # - with ELDK 4.2 (EABI supported), use: | |
5356f545 | 58 | # -mabi=aapcs-linux |
f772acf8 | 59 | # - with ELDK 4.1 (gcc 4.x, no EABI), use: |
5356f545 | 60 | # -mabi=apcs-gnu |
f772acf8 | 61 | # - with ELDK 3.1 (gcc 3.x), use: |
5356f545 | 62 | # -mapcs-32 |
cca4e4ae | 63 | PF_CPPFLAGS_ABI := $(call cc-option,\ |
5356f545 | 64 | -mabi=aapcs-linux,\ |
cca4e4ae WD |
65 | $(call cc-option,\ |
66 | -mapcs-32,\ | |
f772acf8 | 67 | $(call cc-option,\ |
cca4e4ae WD |
68 | -mabi=apcs-gnu,\ |
69 | )\ | |
5356f545 | 70 | )\ |
cca4e4ae WD |
71 | ) |
72 | PLATFORM_CPPFLAGS += $(PF_CPPFLAGS_ARM) $(PF_CPPFLAGS_ABI) | |
f772acf8 WD |
73 | |
74 | # For EABI, make sure to provide raise() | |
75 | ifneq (,$(findstring -mabi=aapcs-linux,$(PLATFORM_CPPFLAGS))) | |
5253418a A |
76 | # This file is parsed many times, so the string may get added multiple |
77 | # times. Also, the prefix needs to be different based on whether | |
78 | # CONFIG_SPL_BUILD is defined or not. 'filter-out' the existing entry | |
79 | # before adding the correct one. | |
80 | ifdef CONFIG_SPL_BUILD | |
81 | PLATFORM_LIBS := $(SPLTREE)/arch/arm/lib/eabi_compat.o \ | |
82 | $(filter-out %/arch/arm/lib/eabi_compat.o, $(PLATFORM_LIBS)) | |
83 | else | |
84 | PLATFORM_LIBS := $(OBJTREE)/arch/arm/lib/eabi_compat.o \ | |
85 | $(filter-out %/arch/arm/lib/eabi_compat.o, $(PLATFORM_LIBS)) | |
f772acf8 WD |
86 | endif |
87 | endif | |
92d5ecba | 88 | |
92d5ecba | 89 | # needed for relocation |
9710504d | 90 | ifndef CONFIG_NAND_SPL |
a4594e41 | 91 | LDFLAGS_u-boot += -pie |
92d5ecba | 92 | endif |
0f20bb60 AM |
93 | |
94 | # | |
95 | # FIXME: binutils versions < 2.22 have a bug in the assembler where | |
96 | # branches to weak symbols can be incorrectly optimized in thumb mode | |
97 | # to a short branch (b.n instruction) that won't reach when the symbol | |
98 | # gets preempted | |
99 | # | |
100 | # http://sourceware.org/bugzilla/show_bug.cgi?id=12532 | |
101 | # | |
102 | ifeq ($(CONFIG_SYS_THUMB_BUILD),y) | |
103 | ifeq ($(GAS_BUG_12532),) | |
104 | export GAS_BUG_12532:=$(shell if [ $(call binutils-version) -lt 0222 ] ; \ | |
105 | then echo y; else echo n; fi) | |
106 | endif | |
107 | ifeq ($(GAS_BUG_12532),y) | |
108 | PLATFORM_RELFLAGS += -fno-optimize-sibling-calls | |
109 | endif | |
110 | endif |