| 1 | # |
| 2 | # Makefile for the LZMA compressed kernel loader for |
| 3 | # Atheros AR7XXX/AR9XXX based boards |
| 4 | # |
| 5 | # Copyright (C) 2011 Gabor Juhos <juhosg@openwrt.org> |
| 6 | # |
| 7 | # Some parts of this file was based on the OpenWrt specific lzma-loader |
| 8 | # for the BCM47xx and ADM5120 based boards: |
| 9 | # Copyright (C) 2004 Manuel Novoa III (mjn3@codepoet.org) |
| 10 | # Copyright (C) 2005 Mineharu Takahara <mtakahar@yahoo.com> |
| 11 | # Copyright (C) 2005 by Oleg I. Vdovikin <oleg@cs.msu.su> |
| 12 | # |
| 13 | # This program is free software; you can redistribute it and/or modify it |
| 14 | # under the terms of the GNU General Public License version 2 as published |
| 15 | # by the Free Software Foundation. |
| 16 | # |
| 17 | |
| 18 | LOADADDR := |
| 19 | LZMA_TEXT_START := 0x80a00000 |
| 20 | LOADER_DATA := |
| 21 | BOARD := |
| 22 | FLASH_OFFS := |
| 23 | FLASH_MAX := |
| 24 | |
| 25 | CC := $(CROSS_COMPILE)gcc |
| 26 | LD := $(CROSS_COMPILE)ld |
| 27 | OBJCOPY := $(CROSS_COMPILE)objcopy |
| 28 | OBJDUMP := $(CROSS_COMPILE)objdump |
| 29 | |
| 30 | BIN_FLAGS := -O binary -R .reginfo -R .note -R .comment -R .mdebug -S |
| 31 | |
| 32 | CFLAGS = -D__KERNEL__ -Wall -Wstrict-prototypes -Wno-trigraphs -Os \ |
| 33 | -fno-strict-aliasing -fno-common -fomit-frame-pointer -G 0 \ |
| 34 | -mno-abicalls -fno-pic -ffunction-sections -pipe -mlong-calls \ |
| 35 | -fno-common -ffreestanding -fhonour-copts \ |
| 36 | -mabi=32 -march=mips32r2 \ |
| 37 | -Wa,-32 -Wa,-march=mips32r2 -Wa,-mips32r2 -Wa,--trap |
| 38 | CFLAGS += -D_LZMA_PROB32 |
| 39 | |
| 40 | ASFLAGS = $(CFLAGS) -D__ASSEMBLY__ |
| 41 | |
| 42 | LDFLAGS = -static --gc-sections -no-warn-mismatch |
| 43 | LDFLAGS += -e startup -T loader.lds -Ttext $(LZMA_TEXT_START) |
| 44 | |
| 45 | O_FORMAT = $(shell $(OBJDUMP) -i | head -2 | grep elf32) |
| 46 | |
| 47 | OBJECTS := head.o loader.o cache.o board.o printf.o LzmaDecode.o |
| 48 | |
| 49 | ifneq ($(strip $(LOADER_DATA)),) |
| 50 | OBJECTS += data.o |
| 51 | CFLAGS += -DLZMA_WRAPPER=1 -DLOADADDR=$(LOADADDR) |
| 52 | endif |
| 53 | |
| 54 | ifneq ($(strip $(KERNEL_CMDLINE)),) |
| 55 | CFLAGS += -DCONFIG_KERNEL_CMDLINE='"$(KERNEL_CMDLINE)"' |
| 56 | endif |
| 57 | |
| 58 | ifneq ($(strip $(FLASH_OFFS)),) |
| 59 | CFLAGS += -DCONFIG_FLASH_OFFS=$(FLASH_OFFS) |
| 60 | endif |
| 61 | |
| 62 | ifneq ($(strip $(FLASH_MAX)),) |
| 63 | CFLAGS += -DCONFIG_FLASH_MAX=$(FLASH_MAX) |
| 64 | endif |
| 65 | |
| 66 | BOARD_DEF := $(shell echo $(strip $(BOARD)) | tr a-z A-Z | tr - _) |
| 67 | ifneq ($(BOARD_DEF),) |
| 68 | CFLAGS += -DCONFIG_BOARD_$(BOARD_DEF) |
| 69 | endif |
| 70 | |
| 71 | all: loader.bin |
| 72 | |
| 73 | # Don't build dependencies, this may die if $(CC) isn't gcc |
| 74 | dep: |
| 75 | |
| 76 | install: |
| 77 | |
| 78 | %.o : %.c |
| 79 | $(CC) $(CFLAGS) -c -o $@ $< |
| 80 | |
| 81 | %.o : %.S |
| 82 | $(CC) $(ASFLAGS) -c -o $@ $< |
| 83 | |
| 84 | data.o: $(LOADER_DATA) |
| 85 | $(LD) -r -b binary --oformat $(O_FORMAT) -T lzma-data.lds -o $@ $< |
| 86 | |
| 87 | loader.bin: loader.elf |
| 88 | $(OBJCOPY) $(BIN_FLAGS) $< $@ |
| 89 | |
| 90 | loader.elf: $(OBJECTS) |
| 91 | $(LD) $(LDFLAGS) -o $@ $(OBJECTS) |
| 92 | |
| 93 | mrproper: clean |
| 94 | |
| 95 | clean: |
| 96 | rm -f *.elf *.bin *.o |
| 97 | |
| 98 | |
| 99 | |
| 100 | |
