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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
..
spl nand: remove CONFIG_SYS_NAND_PAGE_SIZE 2014-05-15 10:27:24 +02:00
Makefile Add an I/O tracing feature 2014-06-20 11:54:29 -06:00
autoboot.c cosmetic: autoboot: update old style GNU struct init 2014-06-19 11:19:07 -04:00
bedbug.c Consolidate bool type 2013-04-01 16:33:52 -04:00
board_f.c common/board_f: Fix size variable 2014-05-12 15:20:05 -04:00
board_r.c m68k: powerpc: Clean up do_mdm_init 2014-05-29 17:49:33 -04:00
bootm.c Enhance fit_check_sign to check all images 2014-06-19 11:19:02 -04:00
bootm_os.c bootm: Split out code from cmd_bootm.c 2014-06-19 11:18:58 -04:00
bootretry.c Rename bootretry functions and remove #ifdefs 2014-05-29 17:49:00 -04:00
bootstage.c Add GPL-2.0+ SPDX-License-Identifier to source files 2013-07-24 09:44:38 -04:00
bouncebuf.c Add GPL-2.0+ SPDX-License-Identifier to source files 2013-07-24 09:44:38 -04:00
cli.c Add run_command_repeatable() 2014-06-11 16:25:47 -04:00
cli_hush.c common/cli_hush.c: remove unnecessary double braces 2014-06-11 16:27:06 -04:00
cli_readline.c Move bootretry code into bootretry.c and clean up 2014-05-29 17:48:21 -04:00
cli_simple.c Use run_command_repeatable() 2014-06-11 16:25:47 -04:00
cmd_aes.c aes: Add 'aes' command to access AES-128-CBC 2014-03-21 16:43:58 -04:00
cmd_ambapp.c Add GPL-2.0+ SPDX-License-Identifier to source files 2013-07-24 09:44:38 -04:00
cmd_bdinfo.c bd_info: remove bi_barudrate member from struct bd_info 2014-05-12 15:19:45 -04:00
cmd_bedbug.c Use run_command_repeatable() 2014-06-11 16:25:47 -04:00
cmd_bmp.c Coding Style cleanup: replace leading SPACEs by TABs 2013-10-14 16:06:54 -04:00
cmd_boot.c Add GPL-2.0+ SPDX-License-Identifier to source files 2013-07-24 09:44:38 -04:00
cmd_bootldr.c Blackfin: bootldr: use common defines 2011-04-08 00:44:27 -04:00
cmd_bootm.c bootm: Split out code from cmd_bootm.c 2014-06-19 11:18:58 -04:00
cmd_bootmenu.c Remove unnecessary use of hush header file 2014-05-29 17:45:31 -04:00
cmd_bootstage.c Add GPL-2.0+ SPDX-License-Identifier to source files 2013-07-24 09:44:38 -04:00
cmd_cache.c Add GPL-2.0+ SPDX-License-Identifier to source files 2013-07-24 09:44:38 -04:00
cmd_cbfs.c Add GPL-2.0+ SPDX-License-Identifier to source files 2013-07-24 09:44:38 -04:00
cmd_clk.c common: Add new clk command 2014-02-04 16:32:20 +01:00
cmd_console.c Add GPL-2.0+ SPDX-License-Identifier to source files 2013-07-24 09:44:38 -04:00
cmd_cplbinfo.c various cmd_* files: fixed layout a little bit 2010-08-09 01:07:37 +02:00
cmd_cramfs.c Add GPL-2.0+ SPDX-License-Identifier to source files 2013-07-24 09:44:38 -04:00
cmd_dataflash_mmc_mux.c Add GPL-2.0+ SPDX-License-Identifier to source files 2013-07-24 09:44:38 -04:00
cmd_date.c Merge branch 'master' of git://git.denx.de/u-boot-i2c 2013-07-24 09:50:24 -04:00
cmd_dcr.c Add cli_ prefix to readline functions 2014-05-29 17:45:31 -04:00
cmd_demo.c dm: rename device struct to udevice 2014-05-27 10:21:32 -04:00
cmd_dfu.c USB: gadget: added a saner gadget downloader registration API 2014-05-05 08:21:47 +02:00
cmd_diag.c Add GPL-2.0+ SPDX-License-Identifier to source files 2013-07-24 09:44:38 -04:00
cmd_disk.c bootm: make use of legacy image format configurable 2014-06-05 14:44:56 -04:00
cmd_display.c Add GPL-2.0+ SPDX-License-Identifier to source files 2013-07-24 09:44:38 -04:00
cmd_dtt.c Coding Style cleanup: remove trailing white space 2013-10-14 16:06:53 -04:00
cmd_echo.c Add GPL-2.0+ SPDX-License-Identifier to source files 2013-07-24 09:44:38 -04:00
cmd_eeprom.c common, env: Fix support for environment in i2c eeprom 2014-03-28 15:06:30 -04:00
cmd_elf.c Correct vxWorks elf boot to load at correct address 2013-12-13 09:17:32 -05:00
cmd_exit.c Add GPL-2.0+ SPDX-License-Identifier to source files 2013-07-24 09:44:38 -04:00
cmd_ext2.c Fix number base handling of "load" command 2013-10-07 15:54:18 -04:00
cmd_ext4.c EXT4: Fix number base handling of "ext4write" command 2014-02-19 10:47:36 -05:00
cmd_fastboot.c usb/gadget: add the fastboot gadget 2014-05-08 10:38:30 +02:00
cmd_fat.c fs: fatwrite: use map_sysmem before use file_fat_write 2014-06-05 17:01:59 -04:00
cmd_fdc.c bootm: make use of legacy image format configurable 2014-06-05 14:44:56 -04:00
cmd_fdt.c Reverse the meaning of the fit_config_verify() return code 2014-06-19 11:18:58 -04:00
cmd_fitupd.c Add GPL-2.0+ SPDX-License-Identifier to source files 2013-07-24 09:44:38 -04:00
cmd_flash.c Add GPL-2.0+ SPDX-License-Identifier to source files 2013-07-24 09:44:38 -04:00
cmd_fpga.c bootm: make use of legacy image format configurable 2014-06-05 14:44:56 -04:00
cmd_fpgad.c powerpc/ppc4xx: Convert new gdsys files to SPDX license tags 2013-07-26 15:32:59 -04:00
cmd_fs.c Fix number base handling of "load" command 2013-10-07 15:54:18 -04:00
cmd_fuse.c Add the function 'confirm_yesno' for interactive 2014-05-23 11:53:05 +03:00
cmd_gettime.c Add GPL-2.0+ SPDX-License-Identifier to source files 2013-07-24 09:44:38 -04:00
cmd_gpio.c dm: rename device struct to udevice 2014-05-27 10:21:32 -04:00
cmd_gpt.c cmd:gpt: randomly generate each partition uuid if undefined 2014-04-02 16:36:06 -04:00
cmd_hash.c Add GPL-2.0+ SPDX-License-Identifier to source files 2013-07-24 09:44:38 -04:00
cmd_help.c Add GPL-2.0+ SPDX-License-Identifier to source files 2013-07-24 09:44:38 -04:00
cmd_i2c.c Rename bootretry functions and remove #ifdefs 2014-05-29 17:49:00 -04:00
cmd_ide.c Add GPL-2.0+ SPDX-License-Identifier to source files 2013-07-24 09:44:38 -04:00
cmd_immap.c powerpc: mpc8260: consolidate CONFIG_MPC8260 and CONFIG_8260 2014-03-07 10:59:06 -05:00
cmd_ini.c SPDX-License-Identifier: convert BSD-3-Clause files 2013-08-19 15:45:35 -04:00
cmd_io.c Add GPL-2.0+ SPDX-License-Identifier to source files 2013-07-24 09:44:38 -04:00
cmd_iotrace.c Add an I/O tracing feature 2014-06-20 11:54:29 -06:00
cmd_irq.c Coding Style cleanup: remove trailing white space 2013-10-14 16:06:53 -04:00
cmd_itest.c Fix itest mask overflow 2014-06-05 14:38:38 -04:00
cmd_jffs2.c Add GPL-2.0+ SPDX-License-Identifier to source files 2013-07-24 09:44:38 -04:00
cmd_ldrinfo.c Blackfin: ldrinfo: new command 2011-04-08 00:44:27 -04:00
cmd_led.c Coding Style cleanup: remove trailing white space 2013-10-14 16:06:53 -04:00
cmd_license.c Add GPL-2.0+ SPDX-License-Identifier to source files 2013-07-24 09:44:38 -04:00
cmd_load.c Enable xmodem support 2013-08-16 13:45:15 -04:00
cmd_log.c common: Add get_effective_memsize() to memsize.c 2014-02-21 11:06:13 -05:00
cmd_lzmadec.c Add lzmadec command 2014-03-22 14:47:22 -06:00
cmd_mac.c Add GPL-2.0+ SPDX-License-Identifier to source files 2013-07-24 09:44:38 -04:00
cmd_md5sum.c cmd_md5sum.c: remove dead code / fix warning 2014-06-19 11:19:07 -04:00
cmd_mdio.c net: add support for extended registers to mdio command 2013-11-22 16:50:52 -06:00
cmd_mem.c Rename bootretry functions and remove #ifdefs 2014-05-29 17:49:00 -04:00
cmd_mfsl.c common: fsl: Fix broken SPDX-License-Identifier change 2013-10-16 09:24:38 -04:00
cmd_mii.c net: trivial: Fix typos in mii field descriptions 2013-11-22 16:50:04 -06:00
cmd_misc.c Add GPL-2.0+ SPDX-License-Identifier to source files 2013-07-24 09:44:38 -04:00
cmd_mmc.c cmd_mmc: make mmc dev always re-probe the HW 2014-06-12 15:21:12 +03:00
cmd_mmc_spi.c mmc: Split mmc struct, rework mmc initialization (v2) 2014-03-24 12:58:56 +02:00
cmd_mp.c Add GPL-2.0+ SPDX-License-Identifier to source files 2013-07-24 09:44:38 -04:00
cmd_mtdparts.c cmd_mtdparts: use 64 bits for flash size, partition size & offset 2013-10-09 12:52:16 -05:00
cmd_nand.c bootm: make use of legacy image format configurable 2014-06-05 14:44:56 -04:00
cmd_net.c Add GPL-2.0+ SPDX-License-Identifier to source files 2013-07-24 09:44:38 -04:00
cmd_nvedit.c Add cli_ prefix to readline functions 2014-05-29 17:45:31 -04:00
cmd_onenand.c mtd: resync with Linux-3.7.1 2013-05-31 17:12:03 -05:00
cmd_otp.c Add the function 'confirm_yesno' for interactive 2014-05-23 11:53:05 +03:00
cmd_part.c cmd_part: fix typo in part command help text 2014-05-23 12:00:18 +03:00
cmd_pci.c Rename bootretry functions and remove #ifdefs 2014-05-29 17:49:00 -04:00
cmd_pcmcia.c Add GPL-2.0+ SPDX-License-Identifier to source files 2013-07-24 09:44:38 -04:00
cmd_portio.c Add GPL-2.0+ SPDX-License-Identifier to source files 2013-07-24 09:44:38 -04:00
cmd_pxe.c Merge branch 'master' of git://git.denx.de/u-boot-arm 2014-02-26 16:49:58 -05:00
cmd_read.c Add a command to read raw blocks from a partition 2012-12-11 13:17:33 -07:00
cmd_reginfo.c Add GPL-2.0+ SPDX-License-Identifier to source files 2013-07-24 09:44:38 -04:00
cmd_reiser.c cmd_reiser: normalize 'file not found' errors 2013-11-08 15:25:13 -05:00
cmd_sandbox.c sandbox: block driver using host file/device as backing store 2014-01-08 17:24:03 -07:00
cmd_sata.c Add GPL-2.0+ SPDX-License-Identifier to source files 2013-07-24 09:44:38 -04:00
cmd_scsi.c common: spl: Add spl sata boot support 2014-02-19 10:47:43 -05:00
cmd_setexpr.c Coding Style cleanup: remove trailing white space 2013-10-14 16:06:53 -04:00
cmd_sf.c sandbox: spi: Adjust 'sf test' to work on sandbox 2014-01-11 12:21:30 +05:30
cmd_sha1sum.c includes: move openssl headers to include/u-boot 2014-06-19 11:19:04 -04:00
cmd_softswitch.c blackfin: bf609: add softswitch config command 2013-05-13 16:26:12 +08:00
cmd_sound.c Add GPL-2.0+ SPDX-License-Identifier to source files 2013-07-24 09:44:38 -04:00
cmd_source.c bootm: make use of legacy image format configurable 2014-06-05 14:44:56 -04:00
cmd_spi.c Add GPL-2.0+ SPDX-License-Identifier to source files 2013-07-24 09:44:38 -04:00
cmd_spibootldr.c various cmd_* files: fixed layout a little bit 2010-08-09 01:07:37 +02:00
cmd_spl.c Add GPL-2.0+ SPDX-License-Identifier to source files 2013-07-24 09:44:38 -04:00
cmd_strings.c Convert cmd_usage() calls in common to use a return value 2012-03-06 21:09:46 +01:00
cmd_terminal.c Add GPL-2.0+ SPDX-License-Identifier to source files 2013-07-24 09:44:38 -04:00
cmd_test.c cmd_test: implement -e test for file existence 2014-02-19 09:47:34 -05:00
cmd_thordown.c USB: gadget: added a saner gadget downloader registration API 2014-05-05 08:21:47 +02:00
cmd_time.c cmd_time: do not show ticks 2014-05-12 15:19:46 -04:00
cmd_tpm.c Add GPL-2.0+ SPDX-License-Identifier to source files 2013-07-24 09:44:38 -04:00
cmd_trace.c Add GPL-2.0+ SPDX-License-Identifier to source files 2013-07-24 09:44:38 -04:00
cmd_tsi148.c Coding Style cleanup: remove trailing white space 2013-10-14 16:06:53 -04:00
cmd_ubi.c common, ubi: add ubi check volumename command 2014-02-21 11:33:19 -05:00
cmd_ubifs.c ubifs: fix checkpatch warning 2014-02-21 11:33:19 -05:00
cmd_universe.c Coding Style cleanup: remove trailing white space 2013-10-14 16:06:53 -04:00
cmd_unzip.c Add GPL-2.0+ SPDX-License-Identifier to source files 2013-07-24 09:44:38 -04:00
cmd_usb.c Add GPL-2.0+ SPDX-License-Identifier to source files 2013-07-24 09:44:38 -04:00
cmd_usb_mass_storage.c ums: allow the user to specify the device type 2014-05-08 10:38:29 +02:00
cmd_version.c Add GPL-2.0+ SPDX-License-Identifier to source files 2013-07-24 09:44:38 -04:00
cmd_ximg.c bootm: make use of legacy image format configurable 2014-06-05 14:44:56 -04:00
cmd_yaffs2.c u-boot: Update yaffs2 file system 2012-08-09 23:39:18 +02:00
cmd_zfs.c cmd_zfs: normalize 'file not found' errors 2013-11-08 15:25:13 -05:00
cmd_zip.c Add GPL-2.0+ SPDX-License-Identifier to source files 2013-07-24 09:44:38 -04:00
command.c Add 64-bit data support for memory commands 2014-03-04 12:15:30 -05:00
console.c Add the function 'confirm_yesno' for interactive 2014-05-23 11:53:05 +03:00
cros_ec.c cros_ec: Move EC interface into common library 2014-03-17 20:05:46 -06:00
ddr_spd.c driver/ddr/fsl: Add DDR4 support to Freescale DDR driver 2014-04-22 17:58:48 -07:00
dlmalloc.c Consolidate bool type 2013-04-01 16:33:52 -04:00
dlmalloc.src Consolidate bool type 2013-04-01 16:33:52 -04:00
edid.c Add GPL-2.0+ SPDX-License-Identifier to source files 2013-07-24 09:44:38 -04:00
env_attr.c Add GPL-2.0+ SPDX-License-Identifier to source files 2013-07-24 09:44:38 -04:00
env_callback.c common, env: optimize boottime 2014-01-14 09:01:06 -05:00
env_common.c env: Implement support for encrypting environment 2014-03-21 16:44:02 -04:00
env_dataflash.c env: Add env_export() wrapper 2014-03-21 16:43:59 -04:00
env_eeprom.c env_eeprom: Assign default environment during board_init_f 2014-06-05 14:44:56 -04:00
env_embedded.c nand_spl: remove nand_spl infrastructure 2014-06-05 17:01:59 -04:00
env_fat.c env: Add env_export() wrapper 2014-03-21 16:43:59 -04:00
env_flags.c common, env: optimize boottime 2014-01-14 09:01:06 -05:00
env_flash.c env_flash.c: Drop unused variables 2014-04-17 17:44:36 -04:00
env_mmc.c Merge branch 'u-boot/master' 2014-05-09 11:50:14 +02:00
env_nand.c env: Add env_export() wrapper 2014-03-21 16:43:59 -04:00
env_nowhere.c Coding Style cleanup: remove trailing white space 2013-10-14 16:06:53 -04:00
env_nvram.c env: Add env_export() wrapper 2014-03-21 16:43:59 -04:00
env_onenand.c env: Add env_export() wrapper 2014-03-21 16:43:59 -04:00
env_remote.c Coding Style cleanup: remove trailing white space 2013-10-14 16:06:53 -04:00
env_sf.c env: Add env_export() wrapper 2014-03-21 16:43:59 -04:00
env_ubi.c env: Add env_export() wrapper 2014-03-21 16:43:59 -04:00
exports.c Fix SPI build errors in exports.c 2011-12-07 08:41:22 +01:00
fdt_support.c fdt_support: correct the return condition of fdt_initrd() 2014-06-19 11:18:52 -04:00
flash.c Add GPL-2.0+ SPDX-License-Identifier to source files 2013-07-24 09:44:38 -04:00
hash.c includes: move openssl headers to include/u-boot 2014-06-19 11:19:04 -04:00
hwconfig.c Add GPL-2.0+ SPDX-License-Identifier to source files 2013-07-24 09:44:38 -04:00
image-android.c image: add support for Android's boot image format 2014-05-08 10:38:29 +02:00
image-fdt.c image: Remove the fit_load_image() property parameter 2014-06-19 11:18:59 -04:00
image-fit.c includes: move openssl headers to include/u-boot 2014-06-19 11:19:04 -04:00
image-sig.c includes: move openssl headers to include/u-boot 2014-06-19 11:19:04 -04:00
image.c includes: move openssl headers to include/u-boot 2014-06-19 11:19:04 -04:00
iomux.c Coding Style cleanup: remove trailing white space 2013-10-14 16:06:53 -04:00
iotrace.c Add an I/O tracing feature 2014-06-20 11:54:29 -06:00
kallsyms.c Add support for Linux-like kallsysms 2009-06-12 20:45:48 +02:00
kgdb.c Make sure that argv[] argument pointers are not modified. 2010-07-04 23:55:42 +02:00
kgdb_stubs.c kgdb: add default generic stubs 2010-01-18 00:23:00 +01:00
lcd.c sandbox: Add LCD driver 2014-03-17 20:05:49 -06:00
lynxkdi.c checkpatch whitespace cleanups 2011-10-22 01:13:35 +02:00
main.c main: Avoid unncessary strdup()/free() 2014-05-29 17:52:03 -04:00
memsize.c common: Add get_effective_memsize() to memsize.c 2014-02-21 11:06:13 -05:00
menu.c Add cli_ prefix to readline functions 2014-05-29 17:45:31 -04:00
miiphyutil.c Add GPL-2.0+ SPDX-License-Identifier to source files 2013-07-24 09:44:38 -04:00
modem.c Add GPL-2.0+ SPDX-License-Identifier to source files 2013-07-24 09:44:38 -04:00
s_record.c Add GPL-2.0+ SPDX-License-Identifier to source files 2013-07-24 09:44:38 -04:00
splash.c video: consolidate splash screen alignment code 2013-07-08 20:21:24 +02:00
stdio.c serial: arm_dcc: Remove stdio structure support 2013-08-13 08:38:29 +02:00
system_map.c Add support for Linux-like kallsysms 2009-06-12 20:45:48 +02:00
update.c Add GPL-2.0+ SPDX-License-Identifier to source files 2013-07-24 09:44:38 -04:00
usb.c usb: add enum usb_init_type parameter to usb_lowlevel_init 2013-10-20 23:45:26 +02:00
usb_hub.c usb: hub: remove CONFIG_USB_HUB_MIN_POWER_ON_DELAY 2014-06-01 19:20:07 +02:00
usb_kbd.c usb: Fix USB keyboard polling via control endpoint 2014-04-30 10:30:57 +02:00
usb_storage.c Add GPL-2.0+ SPDX-License-Identifier to source files 2013-07-24 09:44:38 -04:00
xyzModem.c common/xyzModem.c: move empty statements to newline 2014-06-11 16:27:06 -04:00