[U-Boot] [PATCH 2/5] cmd: Add dtimg command
Sam Protsenko
semen.protsenko at linaro.org
Thu Apr 19 20:25:09 UTC 2018
On 16 April 2018 at 23:32, Sam Protsenko <semen.protsenko at linaro.org> wrote:
> dtimg command allows user to work with Android DTB/DTBO image format.
> Such as, getting the address of desired DTB/DTBO file, printing the dump
> of the image in U-Boot shell, etc.
>
> This command is needed to provide Android boot with new Android DT image
> format further.
>
> Signed-off-by: Sam Protsenko <semen.protsenko at linaro.org>
> ---
> cmd/Kconfig | 8 +++
> cmd/Makefile | 1 +
> cmd/dtimg.c | 142 ++++++++++++++++++++++++++++++++++++++++++++++++
> common/Makefile | 4 ++
> 4 files changed, 155 insertions(+)
> create mode 100644 cmd/dtimg.c
>
> diff --git a/cmd/Kconfig b/cmd/Kconfig
> index bc1d2f31c0..68f3cc7b48 100644
> --- a/cmd/Kconfig
> +++ b/cmd/Kconfig
> @@ -256,6 +256,14 @@ config CMD_BOOTMENU
> help
> Add an ANSI terminal boot menu command.
>
> +config CMD_DTIMG
> + bool "dtimg"
> + help
> + Android DTB/DTBO image manipulation commands. Read dtb/dtbo files from
> + image into RAM, dump image structure information, etc. Those dtb/dtbo
> + files should be merged in one dtb further, which needs to be passed to
> + the kernel, as part of a boot process.
> +
> config CMD_ELF
> bool "bootelf, bootvx"
> default y
> diff --git a/cmd/Makefile b/cmd/Makefile
> index c4269ac8ac..1cc2e74e9e 100644
> --- a/cmd/Makefile
> +++ b/cmd/Makefile
> @@ -43,6 +43,7 @@ ifdef CONFIG_POST
> obj-$(CONFIG_CMD_DIAG) += diag.o
> endif
> obj-$(CONFIG_CMD_DISPLAY) += display.o
> +obj-$(CONFIG_CMD_DTIMG) += dtimg.o
> obj-$(CONFIG_CMD_ECHO) += echo.o
> obj-$(CONFIG_ENV_IS_IN_EEPROM) += eeprom.o
> obj-$(CONFIG_CMD_EEPROM) += eeprom.o
> diff --git a/cmd/dtimg.c b/cmd/dtimg.c
> new file mode 100644
> index 0000000000..0b046402fe
> --- /dev/null
> +++ b/cmd/dtimg.c
> @@ -0,0 +1,142 @@
> +/*
> + * (C) Copyright 2018 Linaro Ltd.
> + * Sam Protsenko <semen.protsenko at linaro.org>
> + *
> + * SPDX-License-Identifier: GPL-2.0+
> + */
> +
> +#include <image-android-dt.h>
> +#include <common.h>
> +
> +enum cmd_dtimg_info {
> + CMD_DTIMG_START = 0,
> + CMD_DTIMG_SIZE,
> +};
> +
> +static int do_dtimg_dump(cmd_tbl_t *cmdtp, int flag, int argc,
> + char * const argv[])
> +{
> + char *endp;
> + void *hdr;
> +
> + if (argc != 2)
> + return CMD_RET_USAGE;
> +
> + hdr = (void *)simple_strtoul(argv[1], &endp, 16);
> + if (*endp != '\0') {
> + printf("Error: Wrong image address\n");
> + return CMD_RET_FAILURE;
> + }
> +
> + if (!android_dt_check_header(hdr)) {
> + printf("Error: DT image header is incorrect\n");
> + return CMD_RET_FAILURE;
> + }
> +
> + android_dt_print_contents(hdr);
> +
> + return CMD_RET_SUCCESS;
> +}
> +
> +static int dtimg_get_fdt(int argc, char * const argv[], enum cmd_dtimg_info cmd)
> +{
> + void *hdr;
> + u32 index;
> + char *endp;
> + ulong addr;
> + u32 size;
> + char buf[512] = { 0 };
> +
> + if (argc != 4)
> + return CMD_RET_USAGE;
> +
> + hdr = (void *)simple_strtoul(argv[1], &endp, 16);
> + if (*endp != '\0') {
> + printf("Error: Wrong image address\n");
> + return CMD_RET_FAILURE;
> + }
> +
> + if (!android_dt_check_header(hdr)) {
> + printf("Error: DT image header is incorrect\n");
> + return CMD_RET_FAILURE;
> + }
> +
> + index = simple_strtoul(argv[2], &endp, 0);
> + if (*endp != '\0') {
> + printf("Error: Wrong index\n");
> + return CMD_RET_FAILURE;
> + }
> +
> + if (!android_dt_get_fdt_by_index(hdr, index, &addr, &size))
> + return CMD_RET_FAILURE;
> +
> + switch (cmd) {
> + case CMD_DTIMG_START:
> + snprintf(buf, sizeof(buf), "%p", (void *)addr);
> + break;
> + case CMD_DTIMG_SIZE:
> + snprintf(buf, sizeof(buf), "%x", size);
> + break;
> + default:
> + printf("Error: Unknown cmd_dtimg_info value: %d\n", cmd);
> + return CMD_RET_FAILURE;
> + }
> +
> + env_set(argv[3], buf);
> +
> + return CMD_RET_SUCCESS;
> +}
> +
> +static int do_dtimg_start(cmd_tbl_t *cmdtp, int flag, int argc,
> + char * const argv[])
> +{
> + return dtimg_get_fdt(argc, argv, CMD_DTIMG_START);
> +}
> +
> +static int do_dtimg_size(cmd_tbl_t *cmdtp, int flag, int argc,
> + char * const argv[])
> +{
> + return dtimg_get_fdt(argc, argv, CMD_DTIMG_SIZE);
> +}
> +
> +static cmd_tbl_t cmd_dtimg_sub[] = {
> + U_BOOT_CMD_MKENT(dump, 2, 0, do_dtimg_dump, "", ""),
> + U_BOOT_CMD_MKENT(start, 4, 0, do_dtimg_start, "", ""),
> + U_BOOT_CMD_MKENT(size, 4, 0, do_dtimg_size, "", ""),
> +};
> +
> +static int do_dtimg(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[])
> +{
> + cmd_tbl_t *cp;
> +
> + cp = find_cmd_tbl(argv[1], cmd_dtimg_sub, ARRAY_SIZE(cmd_dtimg_sub));
> +
> + /* Strip off leading 'dtimg' command argument */
> + argc--;
> + argv++;
> +
> + if (!cp || argc > cp->maxargs)
> + return CMD_RET_USAGE;
> + if (flag == CMD_FLAG_REPEAT && !cp->repeatable)
> + return CMD_RET_SUCCESS;
> +
> + return cp->cmd(cmdtp, flag, argc, argv);
> +}
> +
> +U_BOOT_CMD(
> + dtimg, CONFIG_SYS_MAXARGS, 0, do_dtimg,
> + "manipulate dtb/dtbo Android image",
> + "dump <addr>\n"
> + " - parse specified image and print its structure info\n"
> + " <addr>: image address in RAM, in hex\n"
> + "dtimg start <addr> <index> <varname>\n"
> + " - get address (hex) of FDT in the image, by index\n"
> + " <addr>: image address in RAM, in hex\n"
> + " <index>: index of desired FDT in the image\n"
> + " <varname>: name of variable where to store address of FDT\n"
> + "dtimg size <addr> <index> <varname>\n"
> + " - get size (hex, bytes) of FDT in the image, by index\n"
> + " <addr>: image address in RAM, in hex\n"
> + " <index>: index of desired FDT in the image\n"
> + " <varname>: name of variable where to store size of FDT"
> +);
> diff --git a/common/Makefile b/common/Makefile
> index 7011dada99..6ef55d0d7a 100644
> --- a/common/Makefile
> +++ b/common/Makefile
> @@ -111,6 +111,10 @@ obj-$(CONFIG_IO_TRACE) += iotrace.o
> obj-y += memsize.o
> obj-y += stdio.o
>
> +ifdef CONFIG_CMD_DTIMG
> +obj-y += image-android-dt.o
> +endif
> +
> ifndef CONFIG_SPL_BUILD
> # This option is not just y/n - it can have a numeric value
> ifdef CONFIG_FASTBOOT_FLASH
> --
> 2.17.0
>
Abandon this change. I'm going to send v2 soon.
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