@@ -118,10 +118,11 @@ endif # ifneq ($(BUILD_DIR),)
OBJTREE := $(if $(BUILD_DIR),$(BUILD_DIR),$(CURDIR))
SPLTREE := $(OBJTREE)/spl
+TPLTREE := $(OBJTREE)/tpl
SRCTREE := $(CURDIR)
TOPDIR := $(SRCTREE)
LNDIR := $(OBJTREE)
-export TOPDIR SRCTREE OBJTREE SPLTREE
+export TOPDIR SRCTREE OBJTREE SPLTREE TPLTREE
MKCONFIG := $(SRCTREE)/mkconfig
export MKCONFIG
@@ -412,6 +413,7 @@ ALL-y += $(obj)u-boot.srec $(obj)u-boot.bin $(obj)System.map
ALL-$(CONFIG_NAND_U_BOOT) += $(obj)u-boot-nand.bin
ALL-$(CONFIG_ONENAND_U_BOOT) += $(obj)u-boot-onenand.bin
ALL-$(CONFIG_SPL) += $(obj)spl/u-boot-spl.bin
+ALL-$(CONFIG_TPL) += $(obj)tpl/u-boot-tpl.bin
ALL-$(CONFIG_OF_SEPARATE) += $(obj)u-boot.dtb $(obj)u-boot-dtb.bin
ifneq ($(CONFIG_SPL_TARGET),)
ALL-$(CONFIG_SPL) += $(obj)$(subst ",,$(CONFIG_SPL_TARGET))
@@ -498,6 +500,18 @@ $(obj)u-boot-with-spl.bin: $(obj)spl/u-boot-spl.bin $(obj)u-boot.bin
cat $(obj)spl/u-boot-spl-pad.bin $(obj)u-boot.bin > $@
rm $(obj)spl/u-boot-spl-pad.bin
+$(obj)u-boot-with-tpl.bin: $(obj)spl/u-boot-spl.bin $(obj)tpl/u-boot-tpl.bin \
+ $(obj)u-boot.bin
+ $(OBJCOPY) ${OBJCFLAGS} --pad-to=$(CONFIG_SPL_PAD_TO) \
+ -I binary -O binary \
+ $(obj)spl/u-boot-spl.bin $(obj)spl/u-boot-spl-pad.bin
+ $(OBJCOPY) ${OBJCFLAGS} --pad-to=$(CONFIG_SYS_PAD_TO) \
+ -I binary -O binary \
+ $(obj)tpl/u-boot-tpl.bin $(obj)tpl/u-boot-tpl-pad.bin
+ cat $(obj)spl/u-boot-spl-pad.bin $(obj)tpl/u-boot-tpl-pad.bin \
+ $(obj)u-boot.bin > $@
+ rm $(obj)spl/u-boot-spl-pad.bin $(obj)tpl/u-boot-tpl-pad.bin
+
$(obj)u-boot-with-spl.imx: $(obj)spl/u-boot-spl.bin $(obj)u-boot.bin
$(MAKE) -C $(SRCTREE)/arch/arm/imx-common \
$(OBJTREE)/u-boot-with-spl.imx
@@ -622,6 +636,9 @@ $(obj)u-boot-nand.bin: nand_spl $(obj)u-boot.bin
$(obj)spl/u-boot-spl.bin: $(SUBDIR_TOOLS) depend
$(MAKE) -C spl all
+$(obj)tpl/u-boot-tpl.bin: $(SUBDIR_TOOLS) depend
+ $(MAKE) -C tpl all
+
updater:
$(MAKE) -C tools/updater all
@@ -877,6 +894,8 @@ clobber: tidy
@rm -f $(obj)nand_spl/{u-boot-nand_spl.lds,u-boot-spl,u-boot-spl.map}
@rm -f $(obj)spl/{u-boot-spl,u-boot-spl.bin,u-boot-spl.map}
@rm -f $(obj)spl/u-boot-spl.lds
+ @rm -f $(obj)tpl/{u-boot-tpl,u-boot-tpl.bin,u-boot-tpl.map}
+ @rm -f $(obj)tpl/u-boot-tpl.lds
@rm -f $(obj)MLO MLO.byteswap
@rm -f $(obj)SPL
@rm -f $(obj)tools/xway-swap-bytes
@@ -2999,9 +2999,10 @@ FIT uImage format:
Set for the SPL on PPC mpc8xxx targets, support for
arch/powerpc/cpu/mpc8xxx/ddr/libddr.o in SPL binary.
- CONFIG_SPL_COMMON_INIT_DDR
+ CONFIG_COMMON_INIT_DDR
Set for common ddr init with serial presence detect in
- SPL binary.
+ SPL binary or TPL binary.
+
CONFIG_SYS_NAND_5_ADDR_CYCLE, CONFIG_SYS_NAND_PAGE_COUNT,
CONFIG_SYS_NAND_PAGE_SIZE, CONFIG_SYS_NAND_OOBSIZE,
CONFIG_SYS_NAND_BLOCK_SIZE, CONFIG_SYS_NAND_BAD_BLOCK_POS,
@@ -3050,8 +3051,9 @@ FIT uImage format:
CONFIG_SPL_NET_SUPPORT
Support for the net/libnet.o in SPL binary.
- It conflicts with SPL env from storage medium specified by
- CONFIG_ENV_IS_xxx but CONFIG_ENV_IS_NOWHERE
+ It only co-exist with CONFIG_ENV_IS_NOWHERE in the SPL. it
+ conflicts with SPL env from storage medium specified by
+ CONFIG_ENV_IS_xxx.
CONFIG_SPL_ENV_IMPORT
Support for importing the environment in SPL.
@@ -3074,6 +3076,13 @@ FIT uImage format:
option to re-enable it. This will affect the output of the
bootm command when booting a FIT image.
+- TPL framework
+ CONFIG_TPL
+ Enable building of TPL globally.
+
+ CONFIG_TPL_TEXT_BASE
+ TEXT_BASE for linking the TPL binary.
+
Modem Support:
--------------
@@ -4111,11 +4120,51 @@ Low Level (hardware related) configuration options:
that is executed before the actual U-Boot. E.g. when
compiling a NAND SPL.
+- CONFIG_TPL_BUILD
+ Modifies the behaviour of start.S when compiling a loader
+ that is executed after the SPL and before the actual U-Boot.
+ It is loaded by the SPL.
+
- CONFIG_SYS_MPC85XX_NO_RESETVEC
Only for 85xx systems. If this variable is specified, the section
.resetvec is not kept and the section .bootpg is placed in the
previous 4k of the .text section.
+- CONFIG_SYS_MPC8XXX_INIT_DDR_SUPPORT
+ Set for the SPL on PPC mpc8xxx targets, support for
+ arch/powerpc/cpu/mpc8xxx/ddr/libddr.o.
+
+- CONFIG_SYS_ENV_SUPPORT
+ Support for the environment operating.
+
+- CONFIG_SYS_SERIAL_SUPPORT
+ Support for drivers/serial/libserial.o.
+
+- CONFIG_SYS_LIBGENERIC_SUPPORT
+ Support for lib/libgeneric.o.
+
+- CONFIG_SYS_LIBCOMMON_SUPPORT
+ Support for common/libcommon.o.
+
+- CONFIG_SYS_I2C_SUPPORT
+ Support for drivers/i2c/libi2c.o.
+
+- CONFIG_SYS_NAND_SUPPORT
+ Support for drivers/mtd/nand/libnand.o.
+
+- CONFIG_SYS_MAX_SIZE
+ Maximum size of the image (text, data, rodata, and
+ linker lists sections), BSS excluded.
+ When defined, the linker checks that the actual size does
+ not exceed it.
+
+- CONFIG_SYS_PAD_TO
+ Image offset to which the image should be padded before appending
+ the image payload. By default, this is defined as
+ CONFIG_SYS_MAX_SIZE, or 0 if CONFIG_SYS_MAX_SIZE is undefined.
+ CONFIG_SYS_PAD_TO must be either 0, meaning to append the image
+ payload without any padding, or >= CONFIG_SYS_MAX_SIZE.
+
- CONFIG_ARCH_MAP_SYSMEM
Generally U-Boot (and in particular the md command) uses
effective address. It is therefore not necessary to regard
@@ -48,5 +48,7 @@ endif
# Only test once
ifneq ($(CONFIG_SPL_BUILD),y)
+ifneq ($(CONFIG_TPL_BUILD),y)
ALL-y += checkgcc4
endif
+endif
@@ -218,13 +218,13 @@ compute_lowest_common_dimm_parameters(const dimm_params_t *dimm_params,
if (dimm_params[i].n_ranks) {
if (dimm_params[i].registered_dimm) {
temp1 = 1;
-#ifndef CONFIG_SPL_BUILD
+#if !defined(CONFIG_SPL_BUILD) && !defined(CONFIG_TPL_BUILD)
printf("Detected RDIMM %s\n",
dimm_params[i].mpart);
#endif
} else {
temp2 = 1;
-#ifndef CONFIG_SPL_BUILD
+#if !defined(CONFIG_SPL_BUILD) && !defined(CONFIG_TPL_BUILD)
printf("Detected UDIMM %s\n",
dimm_params[i].mpart);
#endif
@@ -59,10 +59,12 @@ SOBJS-y += reloc.o
COBJS-$(CONFIG_BAT_RW) += bat_rw.o
ifndef CONFIG_SPL_BUILD
+ifndef CONFIG_TPL_BUILD
ifndef CONFIG_SYS_GENERIC_BOARD
COBJS-y += board.o
endif
endif
+endif
COBJS-y += bootm.o
COBJS-y += cache.o
COBJS-y += extable.o
@@ -27,6 +27,7 @@ LIB = $(obj)libcommon.o
# core
ifndef CONFIG_SPL_BUILD
+ifndef CONFIG_TPL_BUILD
COBJS-y += main.o
COBJS-y += command.o
COBJS-y += exports.o
@@ -204,6 +205,7 @@ COBJS-$(CONFIG_USB_KEYBOARD) += usb_kbd.o
COBJS-$(CONFIG_CMD_DFU) += cmd_dfu.o
COBJS-$(CONFIG_CMD_GPT) += cmd_gpt.o
endif
+endif
ifdef CONFIG_SPL_BUILD
COBJS-$(CONFIG_ENV_IS_IN_FLASH) += env_flash.o
@@ -223,6 +225,13 @@ else
COBJS-y += env_nowhere.o
endif
endif
+
+ifdef CONFIG_TPL_BUILD
+COBJS-$(CONFIG_SYS_ENV_SUPPORT) += env_attr.o
+COBJS-$(CONFIG_SYS_ENV_SUPPORT) += env_flags.o
+COBJS-$(CONFIG_SYS_ENV_SUPPORT) += env_callback.o
+endif
+
# core command
COBJS-y += cmd_nvedit.o
#environment
@@ -87,7 +87,7 @@ int get_env_id(void)
return env_id;
}
-#ifndef CONFIG_SPL_BUILD
+#if !defined(CONFIG_SPL_BUILD) && !defined(CONFIG_TPL_BUILD)
/*
* Command interface: print one or all environment variables
*
@@ -356,7 +356,7 @@ ulong getenv_hex(const char *varname, ulong default_val)
return value;
}
-#ifndef CONFIG_SPL_BUILD
+#if !defined(CONFIG_SPL_BUILD) && !defined(CONFIG_TPL_BUILD)
static int do_env_set(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[])
{
if (argc < 2)
@@ -700,7 +700,7 @@ ulong getenv_ulong(const char *name, int base, ulong default_val)
return str ? simple_strtoul(str, NULL, base) : default_val;
}
-#ifndef CONFIG_SPL_BUILD
+#if !defined(CONFIG_SPL_BUILD) && !defined(CONFIG_TPL_BUILD)
#if defined(CONFIG_CMD_SAVEENV) && !defined(CONFIG_ENV_IS_NOWHERE)
static int do_env_save(cmd_tbl_t *cmdtp, int flag, int argc,
char * const argv[])
@@ -741,7 +741,7 @@ int envmatch(uchar *s1, int i2)
return -1;
}
-#ifndef CONFIG_SPL_BUILD
+#if !defined(CONFIG_SPL_BUILD) && !defined(CONFIG_TPL_BUILD)
static int do_env_default(cmd_tbl_t *cmdtp, int __flag,
int argc, char * const argv[])
{
@@ -41,8 +41,12 @@ ifneq ($(OBJTREE),$(SRCTREE))
ifeq ($(CONFIG_SPL_BUILD),y)
obj := $(if $(dir),$(SPLTREE)/$(dir)/,$(SPLTREE)/)
else
+ifeq ($(CONFIG_TPL_BUILD),y)
+obj := $(if $(dir),$(TPLTREE)/$(dir)/,$(TPLTREE)/)
+else
obj := $(if $(dir),$(OBJTREE)/$(dir)/,$(OBJTREE)/)
endif
+endif
src := $(if $(dir),$(SRCTREE)/$(dir)/,$(SRCTREE)/)
$(shell mkdir -p $(obj))
@@ -53,8 +57,14 @@ obj := $(if $(dir),$(SPLTREE)/$(dir)/,$(SPLTREE)/)
$(shell mkdir -p $(obj))
else
+ifeq ($(CONFIG_TPL_BUILD),y)
+obj := $(if $(dir),$(TPLTREE)/$(dir)/,$(TPLTREE)/)
+
+$(shell mkdir -p $(obj))
+else
obj :=
endif
+endif
src :=
endif
@@ -210,6 +220,11 @@ CPPFLAGS += -ffunction-sections -fdata-sections
LDFLAGS_FINAL += --gc-sections
endif
+ifeq ($(CONFIG_TPL_BUILD),y)
+CPPFLAGS += -ffunction-sections -fdata-sections
+LDFLAGS_FINAL += --gc-sections
+endif
+
ifneq ($(CONFIG_SYS_TEXT_BASE),)
CPPFLAGS += -DCONFIG_SYS_TEXT_BASE=$(CONFIG_SYS_TEXT_BASE)
endif
@@ -218,10 +233,18 @@ ifneq ($(CONFIG_SPL_TEXT_BASE),)
CPPFLAGS += -DCONFIG_SPL_TEXT_BASE=$(CONFIG_SPL_TEXT_BASE)
endif
+ifneq ($(CONFIG_TPL_TEXT_BASE),)
+CPPFLAGS += -DCONFIG_TPL_TEXT_BASE=$(CONFIG_TPL_TEXT_BASE)
+endif
+
ifneq ($(CONFIG_SPL_PAD_TO),)
CPPFLAGS += -DCONFIG_SPL_PAD_TO=$(CONFIG_SPL_PAD_TO)
endif
+ifneq ($(CONFIG_SYS_PAD_TO),)
+CPPFLAGS += -DCONFIG_SYS_PAD_TO=$(CONFIG_SYS_PAD_TO)
+endif
+
ifneq ($(CONFIG_UBOOT_PAD_TO),)
CPPFLAGS += -DCONFIG_UBOOT_PAD_TO=$(CONFIG_UBOOT_PAD_TO)
endif
@@ -230,6 +253,10 @@ ifeq ($(CONFIG_SPL_BUILD),y)
CPPFLAGS += -DCONFIG_SPL_BUILD
endif
+ifeq ($(CONFIG_TPL_BUILD),y)
+CPPFLAGS += -DCONFIG_TPL_BUILD
+endif
+
# Does this architecture support generic board init?
ifeq ($(__HAVE_ARCH_GENERIC_BOARD),)
ifneq ($(CONFIG_SYS_GENERIC_BOARD),)
@@ -294,6 +321,11 @@ ifneq ($(CONFIG_SPL_TEXT_BASE),)
LDFLAGS_u-boot-spl += -Ttext $(CONFIG_SPL_TEXT_BASE)
endif
+LDFLAGS_u-boot-tpl += -T $(obj)u-boot-spl.lds $(LDFLAGS_FINAL)
+ifneq ($(CONFIG_TPL_TEXT_BASE),)
+LDFLAGS_u-boot-tpl += -Ttext $(CONFIG_TPL_TEXT_BASE)
+endif
+
# Linus' kernel sanity checking tool
CHECKFLAGS := -D__linux__ -Dlinux -D__STDC__ -Dunix -D__unix__ \
-Wbitwise -Wno-return-void -D__CHECK_ENDIAN__ $(CF)
new file mode 100644
@@ -0,0 +1,69 @@
+Generic TPL framework
+=====================
+
+Overview
+--------
+
+Due to the SPL on some boards(powerpc mpc85xx) has a size limit and cannot
+be compatible with all the external device(e.g. DDR). So add a tertiary
+program loader (TPL) to enable a loader stub that runs in the L2 SRAM,
+after being loaded by the code from the SPL. It loads the final uboot image
+into DDR, then jump to it to begin execution. Now, only the powerpc mpc85xx
+has this requirement and will implemente it.
+
+Keep consistent with SPL, with this framework almost all source files for a
+board can be reused. No code duplication or symlinking is necessary anymore.
+
+How it works
+------------
+
+There is a new directory TOPDIR/tpl which contains only a Makefile.
+The object files are built separately for TPL and placed in this directory.
+The final binaries which are generated are u-boot-tpl, u-boot-tpl.bin and
+u-boot-tpl.map.
+
+During the TPL build a variable named CONFIG_TPL_BUILD is exported
+in the make environment and also appended to CPPFLAGS with -DCONFIG_TPL_BUILD.
+Source files can therefore be compiled for TPL with different settings.
+
+For example:
+
+ifeq ($(CONFIG_TPL_BUILD),y)
+COBJS-y += board_tpl.o
+else
+COBJS-y += board.o
+endif
+
+COBJS-$(CONFIG_TPL_BUILD) += foo.o
+
+#ifdef CONFIG_TPL_BUILD
+ foo();
+#endif
+
+
+The building of TPL images can be with:
+
+#define CONFIG_TPL
+
+Because TPL images normally have a different text base, one has to be
+configured by defining CONFIG_TPL_TEXT_BASE. The linker script has to be
+defined with CONFIG_TPL_LDSCRIPT.
+
+To support generic U-Boot libraries and drivers in the TPL binary one can
+optionally define CONFIG_SYS_XXX_SUPPORT. Currently following options
+are supported:
+
+CONFIG_SYS_LIBCOMMON_SUPPORT (common/libcommon.o)
+CONFIG_SYS_LIBDISK_SUPPORT (disk/libdisk.o)
+CONFIG_SYS_I2C_SUPPORT (drivers/i2c/libi2c.o)
+CONFIG_SYS_GPIO_SUPPORT (drivers/gpio/libgpio.o)
+CONFIG_SYS_MMC_SUPPORT (drivers/mmc/libmmc.o)
+CONFIG_SYS_SERIAL_SUPPORT (drivers/serial/libserial.o)
+CONFIG_SYS_SPI_FLASH_SUPPORT (drivers/mtd/spi/libspi_flash.o)
+CONFIG_SYS_SPI_SUPPORT (drivers/spi/libspi.o)
+CONFIG_SYS_FAT_SUPPORT (fs/fat/libfat.o)
+CONFIG_SYS_LIBGENERIC_SUPPORT (lib/libgeneric.o)
+CONFIG_SYS_POWER_SUPPORT (drivers/power/libpower.o)
+CONFIG_SYS_NAND_SUPPORT (drivers/mtd/nand/libnand.o)
+CONFIG_SYS_DMA_SUPPORT (drivers/dma/libdma.o)
+CONFIG_SYS_POST_MEM_SUPPORT (post/drivers/memory.o)
@@ -42,6 +42,7 @@ COBJS-$(CONFIG_SPL_NAND_BASE) += nand_base.o
else # not spl
+ifndef CONFIG_TPL_BUILD
NORMAL_DRIVERS=y
COBJS-y += nand.o
@@ -51,6 +52,7 @@ COBJS-y += nand_util.o
COBJS-y += nand_ecc.o
COBJS-y += nand_base.o
+endif
endif # not spl
ifdef NORMAL_DRIVERS
@@ -82,9 +84,14 @@ COBJS-$(CONFIG_NAND_DOCG4) += docg4.o
else # minimal SPL drivers
+ifdef CONFIG_SPL_BUILD
COBJS-$(CONFIG_NAND_FSL_ELBC) += fsl_elbc_spl.o
COBJS-$(CONFIG_NAND_FSL_IFC) += fsl_ifc_spl.o
COBJS-$(CONFIG_NAND_MXC) += mxc_nand_spl.o
+endif
+ifdef CONFIG_TPL_BUILD
+COBJS-$(CONFIG_NAND_FSL_ELBC) += fsl_elbc_spl.o
+endif
endif # drivers
endif # nand
@@ -47,7 +47,10 @@ static void nand_wait(void)
}
}
-static int nand_load_image(uint32_t offs, unsigned int uboot_size, void *vdst)
+#ifdef CONFIG_SPL_BUILD
+static
+#endif
+int nand_load_image(uint32_t offs, unsigned int uboot_size, void *vdst)
{
fsl_lbc_t *regs = LBC_BASE_ADDR;
uchar *buf = (uchar *)CONFIG_SYS_NAND_BASE;
@@ -371,7 +371,7 @@ static struct serial_device *get_current(void)
/* We must have a console device */
if (!dev) {
-#ifdef CONFIG_SPL_BUILD
+#if defined(CONFIG_SPL_BUILD) || defined(CONFIG_TPL_BUILD)
puts("Cannot find console\n");
hang();
#else
@@ -220,7 +220,8 @@ enum bootstage_id {
*/
ulong timer_get_boot_us(void);
-#if !defined(CONFIG_SPL_BUILD) && !defined(USE_HOSTCC)
+#if !defined(CONFIG_SPL_BUILD) && !defined(CONFIG_TPL_BUILD) && \
+ !defined(USE_HOSTCC)
/*
* Board code can implement show_boot_progress() if needed.
*
new file mode 100644
@@ -0,0 +1,161 @@
+#
+# Copyright 2013 Freescale Semiconductor, Inc.
+#
+# This program is free software; you can redistribute it and/or modify it
+# under the terms of the GNU General Public License as published by the Free
+# Software Foundation; either version 2 of the License, or (at your option)
+# any later version.
+#
+
+CONFIG_TPL_BUILD := y
+export CONFIG_TPL_BUILD
+
+include $(TOPDIR)/config.mk
+
+# We want the final binaries in this directory
+obj := $(OBJTREE)/tpl/
+
+HAVE_VENDOR_COMMON_LIB = $(if $(wildcard $(SRCTREE)/board/$(VENDOR)/common/Makefile),y,n)
+
+ifdef CONFIG_TPL_START_S_PATH
+START_PATH := $(subst ",,$(CONFIG_TPL_START_S_PATH))
+else
+START_PATH := $(CPUDIR)
+endif
+
+START := $(START_PATH)/start.o
+ifeq ($(CPU),x86)
+START += $(START_PATH)/start16.o
+START += $(START_PATH)/resetvec.o
+endif
+ifeq ($(CPU),ppc4xx)
+START += $(START_PATH)/resetvec.o
+endif
+ifeq ($(CPU),mpc85xx)
+START += $(START_PATH)/resetvec.o
+endif
+
+LIBS-y += arch/$(ARCH)/lib/lib$(ARCH).o
+
+LIBS-y += $(CPUDIR)/lib$(CPU).o
+ifeq ($(CPU),mpc83xx)
+LIBS-y += arch/powerpc/cpu/mpc8xxx/lib8xxx.o
+endif
+ifeq ($(CPU),mpc85xx)
+LIBS-y += arch/powerpc/cpu/mpc8xxx/lib8xxx.o
+ifdef CONFIG_SYS_MPC8XXX_INIT_DDR_SUPPORT
+LIBS-y += arch/powerpc/cpu/mpc8xxx/ddr/libddr.o
+endif
+endif
+ifeq ($(CPU),mpc86xx)
+LIBS-y += arch/powerpc/cpu/mpc8xxx/lib8xxx.o
+endif
+
+ifdef SOC
+LIBS-y += $(CPUDIR)/$(SOC)/lib$(SOC).o
+endif
+LIBS-y += board/$(BOARDDIR)/lib$(BOARD).o
+LIBS-$(HAVE_VENDOR_COMMON_LIB) += board/$(VENDOR)/common/lib$(VENDOR).o
+
+LIBS-$(CONFIG_SYS_LIBCOMMON_SUPPORT) += common/libcommon.o
+LIBS-$(CONFIG_SYS_LIBDISK_SUPPORT) += disk/libdisk.o
+LIBS-$(CONFIG_SYS_I2C_SUPPORT) += drivers/i2c/libi2c.o
+LIBS-$(CONFIG_SYS_GPIO_SUPPORT) += drivers/gpio/libgpio.o
+LIBS-$(CONFIG_SYS_MMC_SUPPORT) += drivers/mmc/libmmc.o
+LIBS-$(CONFIG_SYS_SERIAL_SUPPORT) += drivers/serial/libserial.o
+LIBS-$(CONFIG_SYS_SPI_FLASH_SUPPORT) += drivers/mtd/spi/libspi_flash.o
+LIBS-$(CONFIG_SYS_SPI_SUPPORT) += drivers/spi/libspi.o
+LIBS-$(CONFIG_SYS_FAT_SUPPORT) += fs/fat/libfat.o
+LIBS-$(CONFIG_SYS_LIBGENERIC_SUPPORT) += lib/libgeneric.o
+LIBS-$(CONFIG_SYS_POWER_SUPPORT) += drivers/power/libpower.o
+LIBS-$(CONFIG_SYS_NAND_SUPPORT) += drivers/mtd/nand/libnand.o
+LIBS-$(CONFIG_SYS_ONENAND_SUPPORT) += drivers/mtd/onenand/libonenand.o
+LIBS-$(CONFIG_SYS_DMA_SUPPORT) += drivers/dma/libdma.o
+LIBS-$(CONFIG_SYS_POST_MEM_SUPPORT) += post/drivers/memory.o
+LIBS-$(CONFIG_SYS_NET_SUPPORT) += net/libnet.o
+LIBS-$(CONFIG_SYS_ETH_SUPPORT) += drivers/net/libnet.o
+LIBS-$(CONFIG_SYS_ETH_SUPPORT) += drivers/net/phy/libphy.o
+LIBS-$(CONFIG_SYS_MUSB_NEW_SUPPORT) += drivers/usb/musb-new/libusb_musb-new.o
+LIBS-$(CONFIG_SYS_USBETH_SUPPORT) += drivers/usb/gadget/libusb_gadget.o
+
+# Add GCC lib
+ifeq ("$(USE_PRIVATE_LIBGCC)", "yes")
+PLATFORM_LIBGCC = $(TPLTREE)/arch/$(ARCH)/lib/libgcc.o
+PLATFORM_LIBS := $(filter-out %/libgcc.o, $(filter-out -lgcc, $(PLATFORM_LIBS))) $(PLATFORM_LIBGCC)
+endif
+
+START := $(addprefix $(TPLTREE)/,$(START))
+LIBS := $(addprefix $(TPLTREE)/,$(sort $(LIBS-y)))
+
+__START := $(subst $(obj),,$(START))
+__LIBS := $(subst $(obj),,$(LIBS))
+
+# Linker Script
+ifdef CONFIG_SPL_LDSCRIPT
+# need to strip off double quotes
+LDSCRIPT := $(addprefix $(SRCTREE)/,$(subst ",,$(CONFIG_SPL_LDSCRIPT)))
+endif
+
+ifeq ($(wildcard $(LDSCRIPT)),)
+ LDSCRIPT := $(TOPDIR)/board/$(BOARDDIR)/u-boot-spl.lds
+endif
+ifeq ($(wildcard $(LDSCRIPT)),)
+ LDSCRIPT := $(TOPDIR)/$(CPUDIR)/u-boot-spl.lds
+endif
+ifeq ($(wildcard $(LDSCRIPT)),)
+ LDSCRIPT := $(TOPDIR)/arch/$(ARCH)/cpu/u-boot-spl.lds
+endif
+ifeq ($(wildcard $(LDSCRIPT)),)
+$(error could not find linker script)
+endif
+
+# Special flags for CPP when processing the linker script.
+# Pass the version down so we can handle backwards compatibility
+# on the fly.
+LDPPFLAGS += \
+ -include $(TOPDIR)/include/u-boot/u-boot.lds.h \
+ -include $(OBJTREE)/include/config.h \
+ -DCPUDIR=$(CPUDIR) \
+ $(shell $(LD) --version | \
+ sed -ne 's/GNU ld version \([0-9][0-9]*\)\.\([0-9][0-9]*\).*/-DLD_MAJOR=\1 -DLD_MINOR=\2/p')
+
+$(OBJTREE)/MLO: $(obj)u-boot-tpl.bin
+ $(OBJTREE)/tools/mkimage -T omapimage \
+ -a $(CONFIG_TPL_TEXT_BASE) -d $< $@
+
+$(OBJTREE)/MLO.byteswap: $(obj)u-boot-tpl.bin
+ $(OBJTREE)/tools/mkimage -T omapimage -n byteswap \
+ -a $(CONFIG_TPL_TEXT_BASE) -d $< $@
+
+$(OBJTREE)/TPL : $(obj)u-boot-tpl.bin depend
+ $(MAKE) -C $(SRCTREE)/arch/arm/imx-common $@
+
+ALL-y += $(obj)u-boot-tpl.bin
+
+all: $(ALL-y)
+
+$(obj)u-boot-tpl.bin: $(obj)u-boot-tpl
+ $(OBJCOPY) $(OBJCFLAGS) -O binary $< $@
+
+GEN_UBOOT = \
+ cd $(obj) && $(LD) $(LDFLAGS) $(LDFLAGS_$(@F)) $(__START) \
+ --start-group $(__LIBS) --end-group $(PLATFORM_LIBS) \
+ -Map u-boot-tpl.map -o u-boot-tpl
+
+$(obj)u-boot-tpl: depend $(START) $(LIBS) $(obj)u-boot-spl.lds
+ $(GEN_UBOOT)
+
+$(START): depend
+ $(MAKE) -C $(SRCTREE)/$(START_PATH) $@
+
+$(LIBS): depend
+ $(MAKE) -C $(SRCTREE)$(dir $(subst $(TPLTREE),,$@))
+
+$(obj)u-boot-spl.lds: $(LDSCRIPT) depend
+ $(CPP) $(CPPFLAGS) $(LDPPFLAGS) -I$(obj). -ansi -D__ASSEMBLY__ -P - < $< > $@
+
+depend: $(obj).depend
+.PHONY: depend
+
+# defines $(obj).depend target
+include $(SRCTREE)/rules.mk