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https://github.com/smaeul/u-boot.git
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726a802fda
Since ARMv5, the clz instruction allows for efficient implementation of ffs/fls with builtins. Until ARMv7 (with Thumb-2), this instruction is only available in ARM mode. LTO makes it difficult to force specific functions to be in ARM mode, as it is effectively a form of very aggressive inlining. To work around this, fls/ffs are implemented in assembly for ARMv5 and ARMv6 when compiling U-Boot in Thumb mode. Overall, this saves around 75 bytes per call. This code is synced with v5.15 of the Linux kernel. Signed-off-by: Sean Anderson <sean.anderson@seco.com> Reviewed-by: Tom Rini <trini@konsulko.com>
138 lines
3.6 KiB
Makefile
138 lines
3.6 KiB
Makefile
# SPDX-License-Identifier: GPL-2.0+
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#
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# (C) Copyright 2002-2006
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# Wolfgang Denk, DENX Software Engineering, wd@denx.de.
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lib-$(CONFIG_USE_PRIVATE_LIBGCC) += ashldi3.o ashrdi3.o lshrdi3.o \
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lib1funcs.o uldivmod.o div0.o \
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div64.o muldi3.o
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ifdef CONFIG_CPU_V7M
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obj-y += vectors_m.o crt0.o
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else ifdef CONFIG_ARM64
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obj-y += crt0_64.o
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else
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obj-y += vectors.o crt0.o
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endif
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ifdef CONFIG_ARM64
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obj-y += setjmp_aarch64.o
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else
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obj-y += setjmp.o
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endif
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ifndef CONFIG_SPL_BUILD
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ifdef CONFIG_ARM64
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obj-y += relocate_64.o
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else
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obj-y += relocate.o
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endif
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obj-$(CONFIG_CPU_V7M) += cmd_boot.o
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obj-$(CONFIG_OF_LIBFDT) += bootm-fdt.o
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obj-$(CONFIG_CMD_BOOTI) += bootm.o image.o
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obj-$(CONFIG_CMD_BOOTM) += bootm.o
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obj-$(CONFIG_CMD_BOOTZ) += bootm.o zimage.o
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else
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obj-$(CONFIG_$(SPL_TPL_)FRAMEWORK) += spl.o
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ifdef CONFIG_SPL_FRAMEWORK
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obj-$(CONFIG_CMD_BOOTI) += image.o
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obj-$(CONFIG_CMD_BOOTZ) += zimage.o
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endif
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obj-$(CONFIG_OF_LIBFDT) += bootm-fdt.o
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endif
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ifdef CONFIG_ARM64
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obj-$(CONFIG_$(SPL_TPL_)USE_ARCH_MEMSET) += memset-arm64.o
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obj-$(CONFIG_$(SPL_TPL_)USE_ARCH_MEMCPY) += memcpy-arm64.o
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else
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obj-$(CONFIG_$(SPL_TPL_)USE_ARCH_MEMSET) += memset.o
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obj-$(CONFIG_$(SPL_TPL_)USE_ARCH_MEMCPY) += memcpy.o
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endif
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obj-$(CONFIG_$(SPL_TPL_)SYS_L2_PL310) += cache-pl310.o
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obj-$(CONFIG_$(SPL_TPL_)SEMIHOSTING) += semihosting.o
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ifneq ($(filter y,$(CONFIG_SAVE_PREV_BL_INITRAMFS_START_ADDR) $(CONFIG_SAVE_PREV_BL_FDT_ADDR)),)
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obj-y += save_prev_bl_data.o
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endif
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# obj-$(CONFIG_SAVE_PREV_BL_INITRAMFS_START_ADDR) += save_prev_bl_data.o
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obj-y += bdinfo.o
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obj-y += sections.o
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CFLAGS_REMOVE_sections.o := $(LTO_CFLAGS)
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obj-y += stack.o
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ifdef CONFIG_CPU_V7M
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obj-y += interrupts_m.o
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else ifdef CONFIG_ARM64
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obj-$(CONFIG_FSL_LAYERSCAPE) += ccn504.o
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ifneq ($(CONFIG_GICV2)$(CONFIG_GICV3),)
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obj-y += gic_64.o
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endif
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obj-$(CONFIG_GIC_V3_ITS) += gic-v3-its.o
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obj-y += interrupts_64.o
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else
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obj-y += interrupts.o
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endif
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ifndef CONFIG_$(SPL_TPL_)SYSRESET
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obj-y += reset.o
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endif
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obj-y += cache.o
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obj-$(CONFIG_SYS_ARM_CACHE_CP15) += cache-cp15.o
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CFLAGS_REMOVE_cache-cp15.o := $(LTO_CFLAGS)
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obj-y += psci-dt.o
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obj-$(CONFIG_DEBUG_LL) += debug.o
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# For EABI conformant tool chains, provide eabi_compat()
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ifneq (,$(findstring -mabi=aapcs-linux,$(PLATFORM_CPPFLAGS)))
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extra-y += eabi_compat.o
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endif
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# some files can only build in ARM or THUMB2, not THUMB1
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ifdef CONFIG_$(SPL_)SYS_THUMB_BUILD
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asflags-$(CONFIG_HAS_THUMB2) += -DCONFIG_THUMB2_KERNEL
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ifndef CONFIG_HAS_THUMB2
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# for C files, just apend -marm, which will override previous -mthumb*
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ifndef CONFIG_ARM64
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CFLAGS_cache.o := -marm
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CFLAGS_cache-cp15.o := -marm
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endif
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# For .S, drop -mthumb* and other thumb-related options.
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# CFLAGS_REMOVE_* would not have an effet, so AFLAGS_REMOVE_*
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# was implemented and is used here.
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# Also, define ${target}_NO_THUMB_BUILD for these two targets
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# so that the code knows it should not use Thumb.
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AFLAGS_REMOVE_memset.o := -mthumb -mthumb-interwork
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AFLAGS_REMOVE_memcpy.o := -mthumb -mthumb-interwork
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AFLAGS_memset.o := -DMEMSET_NO_THUMB_BUILD
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AFLAGS_memcpy.o := -DMEMCPY_NO_THUMB_BUILD
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# This is only necessary to force ARM mode on THUMB1 targets.
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ifneq ($(CONFIG_SYS_ARM_ARCH),4)
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obj-y += bitops.o
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endif
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endif
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endif
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# For building EFI apps
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CFLAGS_$(EFI_CRT0) := $(CFLAGS_EFI)
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CFLAGS_REMOVE_$(EFI_CRT0) := $(CFLAGS_NON_EFI)
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CFLAGS_$(EFI_RELOC) := $(CFLAGS_EFI)
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CFLAGS_REMOVE_$(EFI_RELOC) := $(CFLAGS_NON_EFI)
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extra-$(CONFIG_CMD_BOOTEFI_HELLO_COMPILE) += $(EFI_CRT0) $(EFI_RELOC)
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# TODO: As of v2019.01 the relocation code for the EFI application cannot
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# be built on ARMv7-M.
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ifndef CONFIG_CPU_V7M
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#extra-$(CONFIG_CMD_BOOTEFI_SELFTEST) += $(EFI_CRT0) $(EFI_RELOC)
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endif
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extra-$(CONFIG_EFI) += $(EFI_CRT0) $(EFI_RELOC)
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