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u-boot/common/Makefile
Simon Glass aa53233a15 Add an I/O tracing feature 
When debugging drivers it is useful to see what I/O accesses were done
and in what order.

Even if the individual accesses are of little interest it can be useful to
verify that the access pattern is consistent each time an operation is
performed. In this case a checksum can be used to characterise the operation
of a driver. The checksum can be compared across different runs of the
operation to verify that the driver is working properly.

In particular, when performing major refactoring of the driver, where the
access pattern should not change, the checksum provides assurance that the
refactoring work has not broken the driver.

Add an I/O tracing feature and associated commands to provide this facility.
It works by sneaking into the io.h heder for an architecture and redirecting
I/O accesses through its tracing mechanism.

For now no commands are provided to examine the trace buffer. The format is
fairly simple, so 'md' is a reasonable substitute.

Note: The checksum feature is only useful for I/O regions where the contents
do not change outside of software control. Where this is not suitable you can
fall back to manually comparing the addresses. It might be useful to enhance
tracing to only checksum the accesses and not the data read/written.

Signed-off-by: Simon Glass <sjg@chromium.org>
2014-06-20 11:54:29 -06:00

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Makefile
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#
# (C) Copyright 2004-2006
# Wolfgang Denk, DENX Software Engineering, wd@denx.de.
#
# SPDX-License-Identifier: GPL-2.0+
#
# core
ifndef CONFIG_SPL_BUILD
obj-y += main.o
obj-y += command.o
obj-y += exports.o
obj-y += hash.o
ifdef CONFIG_SYS_HUSH_PARSER
obj-y += cli_hush.o
endif
# We always have this since drivers/ddr/fs/interactive.c needs it
obj-y += cli_simple.o
obj-y += cli.o
obj-y += cli_readline.o
obj-y += s_record.o
obj-y += xyzModem.o
obj-y += cmd_disk.o
# This option is not just y/n - it can have a numeric value
ifdef CONFIG_BOOTDELAY
obj-y += autoboot.o
endif
# This option is not just y/n - it can have a numeric value
ifdef CONFIG_BOOT_RETRY_TIME
obj-y += bootretry.o
endif
# boards
obj-$(CONFIG_SYS_GENERIC_BOARD) += board_f.o
obj-$(CONFIG_SYS_GENERIC_BOARD) += board_r.o
# core command
obj-y += cmd_boot.o
obj-$(CONFIG_CMD_BOOTM) += cmd_bootm.o bootm.o bootm_os.o
obj-y += cmd_help.o
obj-y += cmd_version.o
# environment
obj-y += env_attr.o
obj-y += env_callback.o
obj-y += env_flags.o
obj-$(CONFIG_ENV_IS_IN_DATAFLASH) += env_dataflash.o
obj-$(CONFIG_ENV_IS_IN_EEPROM) += env_eeprom.o
extra-$(CONFIG_ENV_IS_EMBEDDED) += env_embedded.o
obj-$(CONFIG_ENV_IS_IN_EEPROM) += env_embedded.o
extra-$(CONFIG_ENV_IS_IN_FLASH) += env_embedded.o
obj-$(CONFIG_ENV_IS_IN_NVRAM) += env_embedded.o
obj-$(CONFIG_ENV_IS_IN_FLASH) += env_flash.o
obj-$(CONFIG_ENV_IS_IN_MMC) += env_mmc.o
obj-$(CONFIG_ENV_IS_IN_FAT) += env_fat.o
obj-$(CONFIG_ENV_IS_IN_NAND) += env_nand.o
obj-$(CONFIG_ENV_IS_IN_NVRAM) += env_nvram.o
obj-$(CONFIG_ENV_IS_IN_ONENAND) += env_onenand.o
obj-$(CONFIG_ENV_IS_IN_SPI_FLASH) += env_sf.o
obj-$(CONFIG_ENV_IS_IN_REMOTE) += env_remote.o
obj-$(CONFIG_ENV_IS_IN_UBI) += env_ubi.o
obj-$(CONFIG_ENV_IS_NOWHERE) += env_nowhere.o
# command
obj-$(CONFIG_CMD_AES) += cmd_aes.o
obj-$(CONFIG_CMD_AMBAPP) += cmd_ambapp.o
obj-$(CONFIG_SOURCE) += cmd_source.o
obj-$(CONFIG_CMD_SOURCE) += cmd_source.o
obj-$(CONFIG_CMD_BDI) += cmd_bdinfo.o
obj-$(CONFIG_CMD_BEDBUG) += bedbug.o cmd_bedbug.o
obj-$(CONFIG_CMD_BMP) += cmd_bmp.o
obj-$(CONFIG_CMD_BOOTMENU) += cmd_bootmenu.o
obj-$(CONFIG_CMD_BOOTLDR) += cmd_bootldr.o
obj-$(CONFIG_CMD_BOOTSTAGE) += cmd_bootstage.o
obj-$(CONFIG_CMD_CACHE) += cmd_cache.o
obj-$(CONFIG_CMD_CBFS) += cmd_cbfs.o
obj-$(CONFIG_CMD_CLK) += cmd_clk.o
obj-$(CONFIG_CMD_CONSOLE) += cmd_console.o
obj-$(CONFIG_CMD_CPLBINFO) += cmd_cplbinfo.o
obj-$(CONFIG_DATAFLASH_MMC_SELECT) += cmd_dataflash_mmc_mux.o
obj-$(CONFIG_CMD_DATE) += cmd_date.o
obj-$(CONFIG_CMD_DEMO) += cmd_demo.o
obj-$(CONFIG_CMD_SOUND) += cmd_sound.o
ifdef CONFIG_4xx
obj-$(CONFIG_CMD_SETGETDCR) += cmd_dcr.o
endif
ifdef CONFIG_POST
obj-$(CONFIG_CMD_DIAG) += cmd_diag.o
endif
obj-$(CONFIG_CMD_DISPLAY) += cmd_display.o
obj-$(CONFIG_CMD_DTT) += cmd_dtt.o
obj-$(CONFIG_CMD_ECHO) += cmd_echo.o
obj-$(CONFIG_ENV_IS_IN_EEPROM) += cmd_eeprom.o
obj-$(CONFIG_CMD_EEPROM) += cmd_eeprom.o
obj-$(CONFIG_CMD_ELF) += cmd_elf.o
obj-$(CONFIG_SYS_HUSH_PARSER) += cmd_exit.o
obj-$(CONFIG_CMD_EXT4) += cmd_ext4.o
obj-$(CONFIG_CMD_EXT2) += cmd_ext2.o
obj-$(CONFIG_CMD_FAT) += cmd_fat.o
obj-$(CONFIG_CMD_FDC) += cmd_fdc.o
obj-$(CONFIG_OF_LIBFDT) += cmd_fdt.o fdt_support.o
obj-$(CONFIG_CMD_FITUPD) += cmd_fitupd.o
obj-$(CONFIG_CMD_FLASH) += cmd_flash.o
ifdef CONFIG_FPGA
obj-$(CONFIG_CMD_FPGA) += cmd_fpga.o
endif
obj-$(CONFIG_CMD_FPGAD) += cmd_fpgad.o
obj-$(CONFIG_CMD_FS_GENERIC) += cmd_fs.o
obj-$(CONFIG_CMD_FUSE) += cmd_fuse.o
obj-$(CONFIG_CMD_GETTIME) += cmd_gettime.o
obj-$(CONFIG_CMD_GPIO) += cmd_gpio.o
obj-$(CONFIG_CMD_I2C) += cmd_i2c.o
obj-$(CONFIG_CMD_IOTRACE) += cmd_iotrace.o
obj-$(CONFIG_CMD_HASH) += cmd_hash.o
obj-$(CONFIG_CMD_IDE) += cmd_ide.o
obj-$(CONFIG_CMD_IMMAP) += cmd_immap.o
obj-$(CONFIG_CMD_INI) += cmd_ini.o
obj-$(CONFIG_CMD_IRQ) += cmd_irq.o
obj-$(CONFIG_CMD_ITEST) += cmd_itest.o
obj-$(CONFIG_CMD_JFFS2) += cmd_jffs2.o
obj-$(CONFIG_CMD_CRAMFS) += cmd_cramfs.o
obj-$(CONFIG_CMD_LDRINFO) += cmd_ldrinfo.o
obj-$(CONFIG_CMD_LED) += cmd_led.o
obj-$(CONFIG_CMD_LICENSE) += cmd_license.o
obj-y += cmd_load.o
obj-$(CONFIG_LOGBUFFER) += cmd_log.o
obj-$(CONFIG_ID_EEPROM) += cmd_mac.o
obj-$(CONFIG_CMD_MD5SUM) += cmd_md5sum.o
obj-$(CONFIG_CMD_MEMORY) += cmd_mem.o
obj-$(CONFIG_CMD_IO) += cmd_io.o
obj-$(CONFIG_CMD_MFSL) += cmd_mfsl.o
obj-$(CONFIG_MII) += miiphyutil.o
obj-$(CONFIG_CMD_MII) += miiphyutil.o
obj-$(CONFIG_PHYLIB) += miiphyutil.o
obj-$(CONFIG_CMD_MII) += cmd_mii.o
ifdef CONFIG_PHYLIB
obj-$(CONFIG_CMD_MII) += cmd_mdio.o
endif
obj-$(CONFIG_CMD_MISC) += cmd_misc.o
obj-$(CONFIG_CMD_MMC) += cmd_mmc.o
obj-$(CONFIG_CMD_MMC_SPI) += cmd_mmc_spi.o
obj-$(CONFIG_MP) += cmd_mp.o
obj-$(CONFIG_CMD_MTDPARTS) += cmd_mtdparts.o
obj-$(CONFIG_CMD_NAND) += cmd_nand.o
obj-$(CONFIG_CMD_NET) += cmd_net.o
obj-$(CONFIG_CMD_ONENAND) += cmd_onenand.o
obj-$(CONFIG_CMD_OTP) += cmd_otp.o
obj-$(CONFIG_CMD_PART) += cmd_part.o
ifdef CONFIG_PCI
obj-$(CONFIG_CMD_PCI) += cmd_pci.o
endif
obj-y += cmd_pcmcia.o
obj-$(CONFIG_CMD_PORTIO) += cmd_portio.o
obj-$(CONFIG_CMD_PXE) += cmd_pxe.o
obj-$(CONFIG_CMD_READ) += cmd_read.o
obj-$(CONFIG_CMD_REGINFO) += cmd_reginfo.o
obj-$(CONFIG_CMD_REISER) += cmd_reiser.o
obj-$(CONFIG_SANDBOX) += cmd_sandbox.o
obj-$(CONFIG_CMD_SATA) += cmd_sata.o
obj-$(CONFIG_CMD_SF) += cmd_sf.o
obj-$(CONFIG_CMD_SCSI) += cmd_scsi.o
obj-$(CONFIG_CMD_SHA1SUM) += cmd_sha1sum.o
obj-$(CONFIG_CMD_SETEXPR) += cmd_setexpr.o
obj-$(CONFIG_CMD_SOFTSWITCH) += cmd_softswitch.o
obj-$(CONFIG_CMD_SPI) += cmd_spi.o
obj-$(CONFIG_CMD_SPIBOOTLDR) += cmd_spibootldr.o
obj-$(CONFIG_CMD_STRINGS) += cmd_strings.o
obj-$(CONFIG_CMD_TERMINAL) += cmd_terminal.o
obj-$(CONFIG_CMD_TIME) += cmd_time.o
obj-$(CONFIG_CMD_TRACE) += cmd_trace.o
obj-$(CONFIG_SYS_HUSH_PARSER) += cmd_test.o
obj-$(CONFIG_CMD_TPM) += cmd_tpm.o
obj-$(CONFIG_CMD_TSI148) += cmd_tsi148.o
obj-$(CONFIG_CMD_UBI) += cmd_ubi.o
obj-$(CONFIG_CMD_UBIFS) += cmd_ubifs.o
obj-$(CONFIG_CMD_UNIVERSE) += cmd_universe.o
obj-$(CONFIG_CMD_UNZIP) += cmd_unzip.o
ifdef CONFIG_LZMA
obj-$(CONFIG_CMD_LZMADEC) += cmd_lzmadec.o
endif
ifdef CONFIG_CMD_USB
obj-y += cmd_usb.o
obj-y += usb.o usb_hub.o
obj-$(CONFIG_USB_STORAGE) += usb_storage.o
endif
obj-$(CONFIG_CMD_FASTBOOT) += cmd_fastboot.o
obj-$(CONFIG_CMD_USB_MASS_STORAGE) += cmd_usb_mass_storage.o
obj-$(CONFIG_CMD_THOR_DOWNLOAD) += cmd_thordown.o
obj-$(CONFIG_CMD_XIMG) += cmd_ximg.o
obj-$(CONFIG_YAFFS2) += cmd_yaffs2.o
obj-$(CONFIG_CMD_SPL) += cmd_spl.o
obj-$(CONFIG_CMD_ZIP) += cmd_zip.o
obj-$(CONFIG_CMD_ZFS) += cmd_zfs.o
# others
obj-$(CONFIG_BOOTSTAGE) += bootstage.o
obj-$(CONFIG_CONSOLE_MUX) += iomux.o
obj-y += flash.o
obj-$(CONFIG_CMD_KGDB) += kgdb.o kgdb_stubs.o
obj-$(CONFIG_I2C_EDID) += edid.o
obj-$(CONFIG_KALLSYMS) += kallsyms.o
obj-y += splash.o
obj-$(CONFIG_LCD) += lcd.o
obj-$(CONFIG_LYNXKDI) += lynxkdi.o
obj-$(CONFIG_MENU) += menu.o
obj-$(CONFIG_MODEM_SUPPORT) += modem.o
obj-$(CONFIG_UPDATE_TFTP) += update.o
obj-$(CONFIG_USB_KEYBOARD) += usb_kbd.o
obj-$(CONFIG_CMD_DFU) += cmd_dfu.o
obj-$(CONFIG_CMD_GPT) += cmd_gpt.o
endif
ifdef CONFIG_SPL_BUILD
obj-$(CONFIG_ENV_IS_IN_FLASH) += env_flash.o
obj-$(CONFIG_SPL_YMODEM_SUPPORT) += xyzModem.o
obj-$(CONFIG_SPL_NET_SUPPORT) += miiphyutil.o
# environment
obj-$(CONFIG_SPL_ENV_SUPPORT) += env_attr.o
obj-$(CONFIG_SPL_ENV_SUPPORT) += env_flags.o
obj-$(CONFIG_SPL_ENV_SUPPORT) += env_callback.o
ifdef CONFIG_SPL_USB_HOST_SUPPORT
obj-$(CONFIG_SPL_USB_SUPPORT) += usb.o usb_hub.o
obj-$(CONFIG_USB_STORAGE) += usb_storage.o
endif
ifdef CONFIG_SPL_SATA_SUPPORT
obj-$(CONFIG_CMD_SCSI) += cmd_scsi.o
endif
ifneq ($(CONFIG_SPL_NET_SUPPORT),y)
obj-$(CONFIG_ENV_IS_NOWHERE) += env_nowhere.o
obj-$(CONFIG_ENV_IS_IN_MMC) += env_mmc.o
obj-$(CONFIG_ENV_IS_IN_NAND) += env_nand.o
obj-$(CONFIG_ENV_IS_IN_SPI_FLASH) += env_sf.o
obj-$(CONFIG_ENV_IS_IN_FLASH) += env_flash.o
else
obj-y += env_nowhere.o
endif
endif
# core command
obj-y += cmd_nvedit.o
#environment
obj-y += env_common.o
#others
ifdef CONFIG_DDR_SPD
SPD := y
endif
ifdef CONFIG_SPD_EEPROM
SPD := y
endif
obj-$(SPD) += ddr_spd.o
obj-$(CONFIG_HWCONFIG) += hwconfig.o
obj-$(CONFIG_BOUNCE_BUFFER) += bouncebuf.o
obj-y += console.o
obj-$(CONFIG_CROS_EC) += cros_ec.o
obj-y += dlmalloc.o
obj-y += image.o
obj-$(CONFIG_ANDROID_BOOT_IMAGE) += image-android.o
obj-$(CONFIG_OF_LIBFDT) += image-fdt.o
obj-$(CONFIG_FIT) += image-fit.o
obj-$(CONFIG_FIT_SIGNATURE) += image-sig.o
obj-$(CONFIG_IO_TRACE) += iotrace.o
obj-y += memsize.o
obj-y += stdio.o
CFLAGS_env_embedded.o := -Wa,--no-warn -DENV_CRC=$(shell tools/envcrc 2>/dev/null)
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