From 258060905e04fe2eb509756ef3b37e23e220a2d6 Mon Sep 17 00:00:00 2001 From: Masahiro Yamada Date: Mon, 21 Apr 2014 18:39:35 +0900 Subject: [PATCH] sandbox: move source files from board/ to arch/sandbox/ Prior to commit 33a02da0, all boards must have board/${BOARD}/ or board/${VENDOR}/${BOARD}/ directory. Now this rule is obsolete. It looks weird that sandbox defines "vendor" and "board" just for meeting the old U-Boot directory structure. Signed-off-by: Masahiro Yamada Cc: Simon Glass --- arch/sandbox/lib/Makefile | 2 +- arch/sandbox/lib/sandbox.c | 83 ++++++++++ board/sandbox/sandbox/Makefile | 7 - board/sandbox/sandbox/README.sandbox | 299 ----------------------------------- board/sandbox/sandbox/sandbox.c | 83 ---------- boards.cfg | 2 +- doc/README.sandbox | 299 +++++++++++++++++++++++++++++++++++ 7 files changed, 384 insertions(+), 391 deletions(-) create mode 100644 arch/sandbox/lib/sandbox.c delete mode 100644 board/sandbox/sandbox/Makefile delete mode 100644 board/sandbox/sandbox/README.sandbox delete mode 100644 board/sandbox/sandbox/sandbox.c create mode 100644 doc/README.sandbox diff --git a/arch/sandbox/lib/Makefile b/arch/sandbox/lib/Makefile index 4c1a38d..6480ebf 100644 --- a/arch/sandbox/lib/Makefile +++ b/arch/sandbox/lib/Makefile @@ -8,4 +8,4 @@ # -obj-y += interrupts.o +obj-y += interrupts.o sandbox.o diff --git a/arch/sandbox/lib/sandbox.c b/arch/sandbox/lib/sandbox.c new file mode 100644 index 0000000..e4d4e02 --- /dev/null +++ b/arch/sandbox/lib/sandbox.c @@ -0,0 +1,83 @@ +/* + * Copyright (c) 2011 The Chromium OS Authors. + * SPDX-License-Identifier: GPL-2.0+ + */ + +#include +#include +#include +#include +#include + +/* + * Pointer to initial global data area + * + * Here we initialize it. + */ +gd_t *gd; + +/* Add a simple GPIO device */ +U_BOOT_DEVICE(gpio_sandbox) = { + .name = "gpio_sandbox", +}; + +void flush_cache(unsigned long start, unsigned long size) +{ +} + +unsigned long timer_read_counter(void) +{ + return os_get_nsec() / 1000; +} + +int dram_init(void) +{ + gd->ram_size = CONFIG_SYS_SDRAM_SIZE; + return 0; +} + +#ifdef CONFIG_BOARD_EARLY_INIT_F +int board_early_init_f(void) +{ +#ifdef CONFIG_VIDEO_SANDBOX_SDL + int ret; + + ret = sandbox_lcd_sdl_early_init(); + if (ret) { + puts("Could not init sandbox LCD emulation\n"); + return ret; + } +#endif + + return 0; +} +#endif + +int arch_early_init_r(void) +{ +#ifdef CONFIG_CROS_EC + if (cros_ec_board_init()) { + printf("%s: Failed to init EC\n", __func__); + return 0; + } +#endif + + return 0; +} + +#ifdef CONFIG_BOARD_LATE_INIT +int board_late_init(void) +{ + if (cros_ec_get_error()) { + /* Force console on */ + gd->flags &= ~GD_FLG_SILENT; + + printf("cros-ec communications failure %d\n", + cros_ec_get_error()); + puts("\nPlease reset with Power+Refresh\n\n"); + panic("Cannot init cros-ec device"); + return -1; + } + return 0; +} +#endif diff --git a/board/sandbox/sandbox/Makefile b/board/sandbox/sandbox/Makefile deleted file mode 100644 index a0b9880..0000000 --- a/board/sandbox/sandbox/Makefile +++ /dev/null @@ -1,7 +0,0 @@ -# -# Copyright (c) 2011 The Chromium OS Authors. -# -# SPDX-License-Identifier: GPL-2.0+ -# - -obj-y := sandbox.o diff --git a/board/sandbox/sandbox/README.sandbox b/board/sandbox/sandbox/README.sandbox deleted file mode 100644 index 529c447..0000000 --- a/board/sandbox/sandbox/README.sandbox +++ /dev/null @@ -1,299 +0,0 @@ -/* - * Copyright (c) 2014 The Chromium OS Authors. - * - * SPDX-License-Identifier: GPL-2.0+ - */ - -Native Execution of U-Boot -========================== - -The 'sandbox' architecture is designed to allow U-Boot to run under Linux on -almost any hardware. To achieve this it builds U-Boot (so far as possible) -as a normal C application with a main() and normal C libraries. - -All of U-Boot's architecture-specific code therefore cannot be built as part -of the sandbox U-Boot. The purpose of running U-Boot under Linux is to test -all the generic code, not specific to any one architecture. The idea is to -create unit tests which we can run to test this upper level code. - -CONFIG_SANDBOX is defined when building a native board. - -The chosen vendor and board names are also 'sandbox', so there is a single -board in board/sandbox/sandbox. - -CONFIG_SANDBOX_BIG_ENDIAN should be defined when running on big-endian -machines. - -Note that standalone/API support is not available at present. - - -Basic Operation ---------------- - -To run sandbox U-Boot use something like: - - make sandbox_config all - ./u-boot - -Note: - If you get errors about 'sdl-config: Command not found' you may need to - install libsdl1.2-dev or similar to get SDL support. Alternatively you can - build sandbox without SDL (i.e. no display/keyboard support) by removing - the CONFIG_SANDBOX_SDL line in include/configs/sandbox.h or using: - - make sandbox_config all NO_SDL=1 - ./u-boot - - -U-Boot will start on your computer, showing a sandbox emulation of the serial -console: - - -U-Boot 2014.04 (Mar 20 2014 - 19:06:00) - -DRAM: 128 MiB -Using default environment - -In: serial -Out: lcd -Err: lcd -=> - -You can issue commands as your would normally. If the command you want is -not supported you can add it to include/configs/sandbox.h. - -To exit, type 'reset' or press Ctrl-C. - - -Console / LCD support ---------------------- - -Assuming that CONFIG_SANDBOX_SDL is defined when building, you can run the -sandbox with LCD and keyboard emulation, using something like: - - ./u-boot -d u-boot.dtb -l - -This will start U-Boot with a window showing the contents of the LCD. If -that window has the focus then you will be able to type commands as you -would on the console. You can adjust the display settings in the device -tree file - see arch/sandbox/dts/sandbox.dts. - - -Command-line Options --------------------- - -Various options are available, mostly for test purposes. Use -h to see -available options. Some of these are described below. - -The terminal is normally in what is called 'raw-with-sigs' mode. This means -that you can use arrow keys for command editing and history, but if you -press Ctrl-C, U-Boot will exit instead of handling this as a keypress. - -Other options are 'raw' (so Ctrl-C is handled within U-Boot) and 'cooked' -(where the terminal is in cooked mode and cursor keys will not work, Ctrl-C -will exit). - -As mentioned above, -l causes the LCD emulation window to be shown. - -A device tree binary file can be provided with -d. If you edit the source -(it is stored at arch/sandbox/dts/sandbox.dts) you must rebuild U-Boot to -recreate the binary file. - -To execute commands directly, use the -c option. You can specify a single -command, or multiple commands separated by a semicolon, as is normal in -U-Boot. Be careful with quoting as the shall will normally process and -swallow quotes. When -c is used, U-Boot exists after the command is complete, -but you can force it to go to interactive mode instead with -i. - - -Memory Emulation ----------------- - -Memory emulation is supported, with the size set by CONFIG_SYS_SDRAM_SIZE. -The -m option can be used to read memory from a file on start-up and write -it when shutting down. This allows preserving of memory contents across -test runs. You can tell U-Boot to remove the memory file after it is read -(on start-up) with the --rm_memory option. - -To access U-Boot's emulated memory within the code, use map_sysmem(). This -function is used throughout U-Boot to ensure that emulated memory is used -rather than the U-Boot application memory. This provides memory starting -at 0 and extending to the size of the emulation. - - -Storing State -------------- - -With sandbox you can write drivers which emulate the operation of drivers on -real devices. Some of these drivers may want to record state which is -preserved across U-Boot runs. This is particularly useful for testing. For -example, the contents of a SPI flash chip should not disappear just because -U-Boot exits. - -State is stored in a device tree file in a simple format which is driver- -specific. You then use the -s option to specify the state file. Use -r to -make U-Boot read the state on start-up (otherwise it starts empty) and -w -to write it on exit (otherwise the stored state is left unchanged and any -changes U-Boot made will be lost). You can also use -n to tell U-Boot to -ignore any problems with missing state. This is useful when first running -since the state file will be empty. - -The device tree file has one node for each driver - the driver can store -whatever properties it likes in there. See 'Writing Sandbox Drivers' below -for more details on how to get drivers to read and write their state. - - -Running and Booting -------------------- - -Since there is no machine architecture, sandbox U-Boot cannot actually boot -a kernel, but it does support the bootm command. Filesystems, memory -commands, hashing, FIT images, verified boot and many other features are -supported. - -When 'bootm' runs a kernel, sandbox will exit, as U-Boot does on a real -machine. Of course in this case, no kernel is run. - -It is also possible to tell U-Boot that it has jumped from a temporary -previous U-Boot binary, with the -j option. That binary is automatically -removed by the U-Boot that gets the -j option. This allows you to write -tests which emulate the action of chain-loading U-Boot, typically used in -a situation where a second 'updatable' U-Boot is stored on your board. It -is very risky to overwrite or upgrade the only U-Boot on a board, since a -power or other failure will brick the board and require return to the -manufacturer in the case of a consumer device. - - -Supported Drivers ------------------ - -U-Boot sandbox supports these emulations: - -- Block devices -- Chrome OS EC -- GPIO -- Host filesystem (access files on the host from within U-Boot) -- Keyboard (Chrome OS) -- LCD -- Serial (for console only) -- Sound (incomplete - see sandbox_sdl_sound_init() for details) -- SPI -- SPI flash -- TPM (Trusted Platform Module) - -Notable omissions are networking and I2C. - -A wide range of commands is implemented. Filesystems which use a block -device are supported. - -Also sandbox uses generic board (CONFIG_SYS_GENERIC_BOARD) and supports -driver model (CONFIG_DM) and associated commands. - - -SPI Emulation -------------- - -Sandbox supports SPI and SPI flash emulation. - -This is controlled by the spi_sf argument, the format of which is: - - bus:cs:device:file - - bus - SPI bus number - cs - SPI chip select number - device - SPI device emulation name - file - File on disk containing the data - -For example: - - dd if=/dev/zero of=spi.bin bs=1M count=4 - ./u-boot --spi_sf 0:0:M25P16:spi.bin - -With this setup you can issue SPI flash commands as normal: - -=>sf probe -SF: Detected M25P16 with page size 64 KiB, total 2 MiB -=>sf read 0 0 10000 -SF: 65536 bytes @ 0x0 Read: OK -=> - -Since this is a full SPI emulation (rather than just flash), you can -also use low-level SPI commands: - -=>sspi 0:0 32 9f -FF202015 - -This is issuing a READ_ID command and getting back 20 (ST Micro) part -0x2015 (the M25P16). - -Drivers are connected to a particular bus/cs using sandbox's state -structure (see the 'spi' member). A set of operations must be provided -for each driver. - - -Configuration settings for the curious are: - -CONFIG_SANDBOX_SPI_MAX_BUS - The maximum number of SPI buses supported by the driver (default 1). - -CONFIG_SANDBOX_SPI_MAX_CS - The maximum number of chip selects supported by the driver - (default 10). - -CONFIG_SPI_IDLE_VAL - The idle value on the SPI bus - - -Writing Sandbox Drivers ------------------------ - -Generally you should put your driver in a file containing the word 'sandbox' -and put it in the same directory as other drivers of its type. You can then -implement the same hooks as the other drivers. - -To access U-Boot's emulated memory, use map_sysmem() as mentioned above. - -If your driver needs to store configuration or state (such as SPI flash -contents or emulated chip registers), you can use the device tree as -described above. Define handlers for this with the SANDBOX_STATE_IO macro. -See arch/sandbox/include/asm/state.h for documentation. In short you provide -a node name, compatible string and functions to read and write the state. -Since writing the state can expand the device tree, you may need to use -state_setprop() which does this automatically and avoids running out of -space. See existing code for examples. - - -Testing -------- - -U-Boot sandbox can be used to run various tests, mostly in the test/ -directory. These include: - - command_ut - - Unit tests for command parsing and handling - compression - - Unit tests for U-Boot's compression algorithms, useful for - security checking. It supports gzip, bzip2, lzma and lzo. - driver model - - test/dm/test-dm.sh to run these. - image - - Unit tests for images: - test/image/test-imagetools.sh - multi-file images - test/image/test-fit.py - FIT images - tracing - - test/trace/test-trace.sh tests the tracing system (see README.trace) - verified boot - - See test/vboot/vboot_test.sh for this - -If you change or enhance any of the above subsystems, you shold write or -expand a test and include it with your patch series submission. Test -coverage in U-Boot is limited, as we need to work to improve it. - -Note that many of these tests are implemented as commands which you can -run natively on your board if desired (and enabled). - -It would be useful to have a central script to run all of these. - --- -Simon Glass -Updated 22-Mar-14 diff --git a/board/sandbox/sandbox/sandbox.c b/board/sandbox/sandbox/sandbox.c deleted file mode 100644 index e4d4e02..0000000 --- a/board/sandbox/sandbox/sandbox.c +++ /dev/null @@ -1,83 +0,0 @@ -/* - * Copyright (c) 2011 The Chromium OS Authors. - * SPDX-License-Identifier: GPL-2.0+ - */ - -#include -#include -#include -#include -#include - -/* - * Pointer to initial global data area - * - * Here we initialize it. - */ -gd_t *gd; - -/* Add a simple GPIO device */ -U_BOOT_DEVICE(gpio_sandbox) = { - .name = "gpio_sandbox", -}; - -void flush_cache(unsigned long start, unsigned long size) -{ -} - -unsigned long timer_read_counter(void) -{ - return os_get_nsec() / 1000; -} - -int dram_init(void) -{ - gd->ram_size = CONFIG_SYS_SDRAM_SIZE; - return 0; -} - -#ifdef CONFIG_BOARD_EARLY_INIT_F -int board_early_init_f(void) -{ -#ifdef CONFIG_VIDEO_SANDBOX_SDL - int ret; - - ret = sandbox_lcd_sdl_early_init(); - if (ret) { - puts("Could not init sandbox LCD emulation\n"); - return ret; - } -#endif - - return 0; -} -#endif - -int arch_early_init_r(void) -{ -#ifdef CONFIG_CROS_EC - if (cros_ec_board_init()) { - printf("%s: Failed to init EC\n", __func__); - return 0; - } -#endif - - return 0; -} - -#ifdef CONFIG_BOARD_LATE_INIT -int board_late_init(void) -{ - if (cros_ec_get_error()) { - /* Force console on */ - gd->flags &= ~GD_FLG_SILENT; - - printf("cros-ec communications failure %d\n", - cros_ec_get_error()); - puts("\nPlease reset with Power+Refresh\n\n"); - panic("Cannot init cros-ec device"); - return -1; - } - return 0; -} -#endif diff --git a/boards.cfg b/boards.cfg index 983c657..8f5ee64 100644 --- a/boards.cfg +++ b/boards.cfg @@ -1179,7 +1179,7 @@ Active powerpc ppc4xx - xilinx ppc405-generic Active powerpc ppc4xx - xilinx ppc405-generic xilinx-ppc405-generic_flash xilinx-ppc405-generic:SYS_TEXT_BASE=0xF7F60000,RESET_VECTOR_ADDRESS=0xF7FFFFFC Ricardo Ribalda Active powerpc ppc4xx - xilinx ppc440-generic xilinx-ppc440-generic xilinx-ppc440-generic:SYS_TEXT_BASE=0x04000000,RESET_VECTOR_ADDRESS=0x04100000,BOOT_FROM_XMD=1 Ricardo Ribalda Active powerpc ppc4xx - xilinx ppc440-generic xilinx-ppc440-generic_flash xilinx-ppc440-generic:SYS_TEXT_BASE=0xF7F60000,RESET_VECTOR_ADDRESS=0xF7FFFFFC Ricardo Ribalda -Active sandbox sandbox - sandbox sandbox sandbox - Simon Glass +Active sandbox sandbox - - sandbox - Simon Glass Active sh sh2 - renesas rsk7203 rsk7203 - Nobuhiro Iwamatsu :Nobuhiro Iwamatsu Active sh sh2 - renesas rsk7264 rsk7264 - Phil Edworthy Active sh sh2 - renesas rsk7269 rsk7269 - - diff --git a/doc/README.sandbox b/doc/README.sandbox new file mode 100644 index 0000000..529c447 --- /dev/null +++ b/doc/README.sandbox @@ -0,0 +1,299 @@ +/* + * Copyright (c) 2014 The Chromium OS Authors. + * + * SPDX-License-Identifier: GPL-2.0+ + */ + +Native Execution of U-Boot +========================== + +The 'sandbox' architecture is designed to allow U-Boot to run under Linux on +almost any hardware. To achieve this it builds U-Boot (so far as possible) +as a normal C application with a main() and normal C libraries. + +All of U-Boot's architecture-specific code therefore cannot be built as part +of the sandbox U-Boot. The purpose of running U-Boot under Linux is to test +all the generic code, not specific to any one architecture. The idea is to +create unit tests which we can run to test this upper level code. + +CONFIG_SANDBOX is defined when building a native board. + +The chosen vendor and board names are also 'sandbox', so there is a single +board in board/sandbox/sandbox. + +CONFIG_SANDBOX_BIG_ENDIAN should be defined when running on big-endian +machines. + +Note that standalone/API support is not available at present. + + +Basic Operation +--------------- + +To run sandbox U-Boot use something like: + + make sandbox_config all + ./u-boot + +Note: + If you get errors about 'sdl-config: Command not found' you may need to + install libsdl1.2-dev or similar to get SDL support. Alternatively you can + build sandbox without SDL (i.e. no display/keyboard support) by removing + the CONFIG_SANDBOX_SDL line in include/configs/sandbox.h or using: + + make sandbox_config all NO_SDL=1 + ./u-boot + + +U-Boot will start on your computer, showing a sandbox emulation of the serial +console: + + +U-Boot 2014.04 (Mar 20 2014 - 19:06:00) + +DRAM: 128 MiB +Using default environment + +In: serial +Out: lcd +Err: lcd +=> + +You can issue commands as your would normally. If the command you want is +not supported you can add it to include/configs/sandbox.h. + +To exit, type 'reset' or press Ctrl-C. + + +Console / LCD support +--------------------- + +Assuming that CONFIG_SANDBOX_SDL is defined when building, you can run the +sandbox with LCD and keyboard emulation, using something like: + + ./u-boot -d u-boot.dtb -l + +This will start U-Boot with a window showing the contents of the LCD. If +that window has the focus then you will be able to type commands as you +would on the console. You can adjust the display settings in the device +tree file - see arch/sandbox/dts/sandbox.dts. + + +Command-line Options +-------------------- + +Various options are available, mostly for test purposes. Use -h to see +available options. Some of these are described below. + +The terminal is normally in what is called 'raw-with-sigs' mode. This means +that you can use arrow keys for command editing and history, but if you +press Ctrl-C, U-Boot will exit instead of handling this as a keypress. + +Other options are 'raw' (so Ctrl-C is handled within U-Boot) and 'cooked' +(where the terminal is in cooked mode and cursor keys will not work, Ctrl-C +will exit). + +As mentioned above, -l causes the LCD emulation window to be shown. + +A device tree binary file can be provided with -d. If you edit the source +(it is stored at arch/sandbox/dts/sandbox.dts) you must rebuild U-Boot to +recreate the binary file. + +To execute commands directly, use the -c option. You can specify a single +command, or multiple commands separated by a semicolon, as is normal in +U-Boot. Be careful with quoting as the shall will normally process and +swallow quotes. When -c is used, U-Boot exists after the command is complete, +but you can force it to go to interactive mode instead with -i. + + +Memory Emulation +---------------- + +Memory emulation is supported, with the size set by CONFIG_SYS_SDRAM_SIZE. +The -m option can be used to read memory from a file on start-up and write +it when shutting down. This allows preserving of memory contents across +test runs. You can tell U-Boot to remove the memory file after it is read +(on start-up) with the --rm_memory option. + +To access U-Boot's emulated memory within the code, use map_sysmem(). This +function is used throughout U-Boot to ensure that emulated memory is used +rather than the U-Boot application memory. This provides memory starting +at 0 and extending to the size of the emulation. + + +Storing State +------------- + +With sandbox you can write drivers which emulate the operation of drivers on +real devices. Some of these drivers may want to record state which is +preserved across U-Boot runs. This is particularly useful for testing. For +example, the contents of a SPI flash chip should not disappear just because +U-Boot exits. + +State is stored in a device tree file in a simple format which is driver- +specific. You then use the -s option to specify the state file. Use -r to +make U-Boot read the state on start-up (otherwise it starts empty) and -w +to write it on exit (otherwise the stored state is left unchanged and any +changes U-Boot made will be lost). You can also use -n to tell U-Boot to +ignore any problems with missing state. This is useful when first running +since the state file will be empty. + +The device tree file has one node for each driver - the driver can store +whatever properties it likes in there. See 'Writing Sandbox Drivers' below +for more details on how to get drivers to read and write their state. + + +Running and Booting +------------------- + +Since there is no machine architecture, sandbox U-Boot cannot actually boot +a kernel, but it does support the bootm command. Filesystems, memory +commands, hashing, FIT images, verified boot and many other features are +supported. + +When 'bootm' runs a kernel, sandbox will exit, as U-Boot does on a real +machine. Of course in this case, no kernel is run. + +It is also possible to tell U-Boot that it has jumped from a temporary +previous U-Boot binary, with the -j option. That binary is automatically +removed by the U-Boot that gets the -j option. This allows you to write +tests which emulate the action of chain-loading U-Boot, typically used in +a situation where a second 'updatable' U-Boot is stored on your board. It +is very risky to overwrite or upgrade the only U-Boot on a board, since a +power or other failure will brick the board and require return to the +manufacturer in the case of a consumer device. + + +Supported Drivers +----------------- + +U-Boot sandbox supports these emulations: + +- Block devices +- Chrome OS EC +- GPIO +- Host filesystem (access files on the host from within U-Boot) +- Keyboard (Chrome OS) +- LCD +- Serial (for console only) +- Sound (incomplete - see sandbox_sdl_sound_init() for details) +- SPI +- SPI flash +- TPM (Trusted Platform Module) + +Notable omissions are networking and I2C. + +A wide range of commands is implemented. Filesystems which use a block +device are supported. + +Also sandbox uses generic board (CONFIG_SYS_GENERIC_BOARD) and supports +driver model (CONFIG_DM) and associated commands. + + +SPI Emulation +------------- + +Sandbox supports SPI and SPI flash emulation. + +This is controlled by the spi_sf argument, the format of which is: + + bus:cs:device:file + + bus - SPI bus number + cs - SPI chip select number + device - SPI device emulation name + file - File on disk containing the data + +For example: + + dd if=/dev/zero of=spi.bin bs=1M count=4 + ./u-boot --spi_sf 0:0:M25P16:spi.bin + +With this setup you can issue SPI flash commands as normal: + +=>sf probe +SF: Detected M25P16 with page size 64 KiB, total 2 MiB +=>sf read 0 0 10000 +SF: 65536 bytes @ 0x0 Read: OK +=> + +Since this is a full SPI emulation (rather than just flash), you can +also use low-level SPI commands: + +=>sspi 0:0 32 9f +FF202015 + +This is issuing a READ_ID command and getting back 20 (ST Micro) part +0x2015 (the M25P16). + +Drivers are connected to a particular bus/cs using sandbox's state +structure (see the 'spi' member). A set of operations must be provided +for each driver. + + +Configuration settings for the curious are: + +CONFIG_SANDBOX_SPI_MAX_BUS + The maximum number of SPI buses supported by the driver (default 1). + +CONFIG_SANDBOX_SPI_MAX_CS + The maximum number of chip selects supported by the driver + (default 10). + +CONFIG_SPI_IDLE_VAL + The idle value on the SPI bus + + +Writing Sandbox Drivers +----------------------- + +Generally you should put your driver in a file containing the word 'sandbox' +and put it in the same directory as other drivers of its type. You can then +implement the same hooks as the other drivers. + +To access U-Boot's emulated memory, use map_sysmem() as mentioned above. + +If your driver needs to store configuration or state (such as SPI flash +contents or emulated chip registers), you can use the device tree as +described above. Define handlers for this with the SANDBOX_STATE_IO macro. +See arch/sandbox/include/asm/state.h for documentation. In short you provide +a node name, compatible string and functions to read and write the state. +Since writing the state can expand the device tree, you may need to use +state_setprop() which does this automatically and avoids running out of +space. See existing code for examples. + + +Testing +------- + +U-Boot sandbox can be used to run various tests, mostly in the test/ +directory. These include: + + command_ut + - Unit tests for command parsing and handling + compression + - Unit tests for U-Boot's compression algorithms, useful for + security checking. It supports gzip, bzip2, lzma and lzo. + driver model + - test/dm/test-dm.sh to run these. + image + - Unit tests for images: + test/image/test-imagetools.sh - multi-file images + test/image/test-fit.py - FIT images + tracing + - test/trace/test-trace.sh tests the tracing system (see README.trace) + verified boot + - See test/vboot/vboot_test.sh for this + +If you change or enhance any of the above subsystems, you shold write or +expand a test and include it with your patch series submission. Test +coverage in U-Boot is limited, as we need to work to improve it. + +Note that many of these tests are implemented as commands which you can +run natively on your board if desired (and enabled). + +It would be useful to have a central script to run all of these. + +-- +Simon Glass +Updated 22-Mar-14 -- 1.9.1