xref: /openbmc/u-boot/arch/mips/config.mk (revision bfc37f3c)
1#
2# (C) Copyright 2003
3# Wolfgang Denk, DENX Software Engineering, wd@denx.de.
4#
5# SPDX-License-Identifier:	GPL-2.0+
6#
7
8ifdef CONFIG_SYS_BIG_ENDIAN
932bit-emul		:= elf32btsmip
1064bit-emul		:= elf64btsmip
1132bit-bfd		:= elf32-tradbigmips
1264bit-bfd		:= elf64-tradbigmips
13PLATFORM_CPPFLAGS	+= -EB
14PLATFORM_LDFLAGS	+= -EB
15endif
16
17ifdef CONFIG_SYS_LITTLE_ENDIAN
1832bit-emul		:= elf32ltsmip
1964bit-emul		:= elf64ltsmip
2032bit-bfd		:= elf32-tradlittlemips
2164bit-bfd		:= elf64-tradlittlemips
22PLATFORM_CPPFLAGS	+= -EL
23PLATFORM_LDFLAGS	+= -EL
24endif
25
26ifdef CONFIG_32BIT
27PLATFORM_CPPFLAGS	+= -mabi=32
28PLATFORM_LDFLAGS	+= -m $(32bit-emul)
29OBJCOPYFLAGS		+= -O $(32bit-bfd)
30endif
31
32ifdef CONFIG_64BIT
33PLATFORM_CPPFLAGS	+= -mabi=64
34PLATFORM_LDFLAGS	+= -m$(64bit-emul)
35OBJCOPYFLAGS		+= -O $(64bit-bfd)
36endif
37
38cpuflags-$(CONFIG_CPU_MIPS32_R1) += -march=mips32 -Wa,-mips32
39cpuflags-$(CONFIG_CPU_MIPS32_R2) += -march=mips32r2 -Wa,-mips32r2
40cpuflags-$(CONFIG_CPU_MIPS64_R1) += -march=mips64 -Wa,-mips64
41cpuflags-$(CONFIG_CPU_MIPS64_R2) += -march=mips64r2 -Wa,-mips64r2
42PLATFORM_CPPFLAGS += $(cpuflags-y)
43
44PLATFORM_CPPFLAGS += -D__MIPS__
45
46#
47# From Linux arch/mips/Makefile
48#
49# GCC uses -G 0 -mabicalls -fpic as default.  We don't want PIC in the kernel
50# code since it only slows down the whole thing.  At some point we might make
51# use of global pointer optimizations but their use of $28 conflicts with
52# the current pointer optimization.
53#
54# The DECStation requires an ECOFF kernel for remote booting, other MIPS
55# machines may also.  Since BFD is incredibly buggy with respect to
56# crossformat linking we rely on the elf2ecoff tool for format conversion.
57#
58# cflags-y			+= -G 0 -mno-abicalls -fno-pic -pipe
59# cflags-y			+= -msoft-float
60# LDFLAGS_vmlinux		+= -G 0 -static -n -nostdlib
61# MODFLAGS			+= -mlong-calls
62#
63# On the other hand, we want PIC in the U-Boot code to relocate it from ROM
64# to RAM. $28 is always used as gp.
65#
66PLATFORM_CPPFLAGS		+= -G 0 -mabicalls -fpic
67PLATFORM_CPPFLAGS		+= -msoft-float
68PLATFORM_LDFLAGS		+= -G 0 -static -n -nostdlib
69PLATFORM_RELFLAGS		+= -ffunction-sections -fdata-sections
70LDFLAGS_FINAL			+= --gc-sections -pie
71OBJCOPYFLAGS			+= -j .text -j .rodata -j .data -j .got
72OBJCOPYFLAGS			+= -j .u_boot_list -j .rel.dyn -j .padding
73