57 lines
2.0 KiB
Makefile
57 lines
2.0 KiB
Makefile
|
# SPDX-License-Identifier: GPL-2.0
|
||
|
|
# Makefile for embedded code blobs for Rockchip SoCs
|
||
|
|
#
|
||
|
|
# These code blobs are emedded into vmlinux and copied into SRAM
|
||
|
|
# at times when SDRAM is not available. Each blob is self contained.
|
||
|
|
#
|
||
|
|
# Some blobs may be linked to expect to run at a very specific address.
|
||
|
|
# A good example is resume code blobs that always expect to run in a
|
||
|
|
# very specific bit of SRAM that keeps power during sleep. This code
|
||
|
|
# is also running with the cache off so it can predict the address it
|
||
|
|
# will be at.
|
||
|
|
#
|
||
|
|
# Other blobs may be linked with -fpic (by adding CFLAGS_file.o := -fpic).
|
||
|
|
# These can be located anywhere. I believe gcc will support this by
|
||
|
|
# assuming that the .text and .data sections are relative to each other.
|
||
|
|
#
|
||
|
|
# That brings up the point that all blobs here:
|
||
|
|
# - Are generally very small
|
||
|
|
# - Generally have code and data jammed together in one blob.
|
||
|
|
# - Generally have "parameters" at the beginning that are filled in by
|
||
|
|
# the kernel.
|
||
|
|
|
||
|
|
obj-$(CONFIG_PM_SLEEP) += rk3288_resume.bin.o
|
||
|
|
|
||
|
|
targets := rk3288_resume.o rk3288_ddr_resume.o \
|
||
|
|
rk3288_resume.elf rk3288_resume.lds \
|
||
|
|
rk3288_resume.bin rk3288_resume.bin.o
|
||
|
|
|
||
|
|
# Reset objcopy flags, ARM puts "-O binary" here.
|
||
|
|
OBJCOPYFLAGS :=
|
||
|
|
|
||
|
|
# Our embedded code can't handle this flag.
|
||
|
|
ifeq ($(CONFIG_FUNCTION_TRACER),y)
|
||
|
|
ORIG_CFLAGS := $(KBUILD_CFLAGS)
|
||
|
|
KBUILD_CFLAGS = $(subst -pg, , $(ORIG_CFLAGS))
|
||
|
|
endif
|
||
|
|
|
||
|
|
KBUILD_CFLAGS += -fno-stack-protector -fPIC
|
||
|
|
|
||
|
|
# This is the ELF for the embedded binary
|
||
|
|
LDFLAGS_rk3288_resume.elf := -Bstatic -nostdlib -T
|
||
|
|
$(obj)/rk3288_resume.elf: $(obj)/rk3288_resume.lds \
|
||
|
|
$(obj)/rk3288_resume.o \
|
||
|
|
$(obj)/rk3288_ddr_resume.o \
|
||
|
|
FORCE
|
||
|
|
$(call if_changed,ld)
|
||
|
|
|
||
|
|
# Create binary data for the kernel
|
||
|
|
OBJCOPYFLAGS_rk3288_resume.bin := -O binary
|
||
|
|
$(obj)/rk3288_resume.bin: $(obj)/rk3288_resume.elf FORCE
|
||
|
|
$(call if_changed,objcopy)
|
||
|
|
|
||
|
|
# Import the data into the kernel
|
||
|
|
OBJCOPYFLAGS_rk3288_resume.bin.o += -B $(ARCH) -I binary -O elf32-littlearm
|
||
|
|
$(obj)/rk3288_resume.bin.o: $(obj)/rk3288_resume.bin FORCE
|
||
|
|
$(call if_changed,objcopy)
|