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#
# Makefile - build a kernel+filesystem image for stand-alone Linux booting
#
# Copyright (C) 2012 ARM Limited. All rights reserved.
#
# Use of this source code is governed by a BSD-style license that can be
# found in the LICENSE.txt file.
# VE
PHYS_OFFSET := 0x80000000
UART_BASE := 0x1c090000
SYSREGS_BASE := 0x1c010000
GIC_DIST_BASE := 0x2c001000
GIC_CPU_BASE := 0x2c002000
CNTFRQ := 0x01800000 # 24Mhz
#INITRD_FLAGS := -DUSE_INITRD
CPPFLAGS += $(INITRD_FLAGS)
BOOTLOADER := boot.S
MBOX_OFFSET := 0xfff8
KERNEL := Image
KERNEL_OFFSET := 0x80000
LD_SCRIPT := model.lds.S
IMAGE := linux-system.axf
FILESYSTEM := filesystem.cpio.gz
FS_OFFSET := 0x10000000
FILESYSTEM_START:= $(shell echo $$(($(PHYS_OFFSET) + $(FS_OFFSET))))
FILESYSTEM_SIZE := $(shell stat -Lc %s $(FILESYSTEM) 2>/dev/null || echo 0)
FILESYSTEM_END := $(shell echo $$(($(FILESYSTEM_START) + $(FILESYSTEM_SIZE))))
FDT_SRC := rtsm_ve-aemv8a.dts
FDT_INCL_REGEX := \(/include/[[:space:]]*"\)\([^"]\+\)\(".*\)
FDT_DEPS := $(FDT_SRC) $(addprefix $(dir $(FDT_SRC)), $(shell sed -ne 'sq$(strip $(FDT_INCL_REGEX)q\2q p' < $(FDT_SRC))))
FDT_OFFSET := 0x08000000
BOOTARGS_COMMON := "console=ttyAMA0 earlyprintk=pl011,0x1c090000 $(BOOTARGS_EXTRA)"
ifneq (,$(findstring USE_INITRD,$(CPPFLAGS)))
BOOTARGS := "$(BOOTARGS_COMMON)"
CHOSEN_NODE := chosen { \
bootargs = \"$(BOOTARGS)\"; \
linux,initrd-start = <$(FILESYSTEM_START)>; \
linux,initrd-end = <$(FILESYSTEM_END)>; \
};
else
BOOTARGS := "root=/dev/nfs nfsroot=\<serverip\>:\<rootfs\>,tcp rw ip=dhcp $(BOOTARGS_COMMON)"
CHOSEN_NODE := chosen { \
bootargs = \"$(BOOTARGS)\"; \
};
endif
CROSS_COMPILE ?= aarch64-none-linux-gnu-
CC := $(CROSS_COMPILE)gcc
LD := $(CROSS_COMPILE)ld
DTC := $(if $(wildcard ./dtc), ./dtc, $(shell which dtc))
all: $(IMAGE)
clean:
rm -f $(IMAGE) boot.o model.lds fdt.dtb
$(IMAGE): boot.o model.lds fdt.dtb $(KERNEL) $(FILESYSTEM)
$(LD) -o $@ --script=model.lds
boot.o: $(BOOTLOADER) Makefile
$(CC) $(CPPFLAGS) -DCNTFRQ=$(CNTFRQ) -DUART_BASE=$(UART_BASE) -DSYSREGS_BASE=$(SYSREGS_BASE) -DGIC_DIST_BASE=$(GIC_DIST_BASE) -DGIC_CPU_BASE=$(GIC_CPU_BASE) -c -o $@ $(BOOTLOADER)
model.lds: $(LD_SCRIPT) Makefile
$(CC) $(CPPFLAGS) -DPHYS_OFFSET=$(PHYS_OFFSET) -DMBOX_OFFSET=$(MBOX_OFFSET) -DKERNEL_OFFSET=$(KERNEL_OFFSET) -DFDT_OFFSET=$(FDT_OFFSET) -DFS_OFFSET=$(FS_OFFSET) -DKERNEL=$(KERNEL) -DFILESYSTEM=$(FILESYSTEM) -E -P -C -o $@ $<
ifeq ($(DTC),)
$(error No dtc found! You can git clone from git://git.jdl.com/software/dtc.git)
endif
fdt.dtb: $(FDT_DEPS) Makefile
( echo "/include/ \"$(FDT_SRC)\"" ; echo "/ { $(CHOSEN_NODE) };" ) | $(DTC) -O dtb -o $@ -
# The filesystem archive might not exist if INITRD is not being used
.PHONY: all clean $(FILESYSTEM)
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