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 38PLATFORM_CPPFLAGS += -D__MIPS__ 39PLATFORM_ELFENTRY = "__start" 40PLATFORM_ELFFLAGS += -B mips $(OBJCOPYFLAGS) 41 42# 43# From Linux arch/mips/Makefile 44# 45# GCC uses -G 0 -mabicalls -fpic as default. We don't want PIC in the kernel 46# code since it only slows down the whole thing. At some point we might make 47# use of global pointer optimizations but their use of $28 conflicts with 48# the current pointer optimization. 49# 50# The DECStation requires an ECOFF kernel for remote booting, other MIPS 51# machines may also. Since BFD is incredibly buggy with respect to 52# crossformat linking we rely on the elf2ecoff tool for format conversion. 53# 54# cflags-y += -G 0 -mno-abicalls -fno-pic -pipe 55# cflags-y += -msoft-float 56# LDFLAGS_vmlinux += -G 0 -static -n -nostdlib 57# MODFLAGS += -mlong-calls 58# 59# On the other hand, we want PIC in the U-Boot code to relocate it from ROM 60# to RAM. $28 is always used as gp. 61# 62ifdef CONFIG_SPL_BUILD 63PF_ABICALLS := -mno-abicalls 64PF_PIC := -fno-pic 65PF_PIE := 66else 67PF_ABICALLS := -mabicalls 68PF_PIC := -fpic 69PF_PIE := -pie 70PF_OBJCOPY := -j .got -j .rel.dyn -j .padding 71PF_OBJCOPY += -j .dtb.init.rodata 72endif 73 74PLATFORM_CPPFLAGS += -G 0 $(PF_ABICALLS) $(PF_PIC) 75PLATFORM_CPPFLAGS += -msoft-float 76PLATFORM_LDFLAGS += -G 0 -static -n -nostdlib 77PLATFORM_RELFLAGS += -ffunction-sections -fdata-sections 78LDFLAGS_FINAL += --gc-sections $(PF_PIE) 79OBJCOPYFLAGS += -j .text -j .rodata -j .data -j .u_boot_list 80OBJCOPYFLAGS += $(PF_OBJCOPY) 81