[U-Boot] [PATCH 1/4] imx: hab: Add routine to set HAB IVT address

[Lothar Waßmann]

Hi,

On Fri,  9 Mar 2018 17:35:46 +0000 Bryan O'Donoghue wrote:
> This patch takes a given address applies a plus or minus offset to locate
> the putative address of an IVT given a non-IVT link location.
> 
> It then sets hab_ivt_address to allow for further logic/scripting based on
> the calculated address.
> 
> This routine is useful when scripting hab_auth_img calls from boot.scr.
> Subsequent patches will illustrate its utility in a board-port.
> 
> Signed-off-by: Bryan O'Donoghue <bryan.odonoghue at linaro.org>
> Cc: Utkarsh Gupta <utkarsh.gupta at nxp.com>
> Cc: Breno Lima <breno.lima at nxp.com>
> Cc: Fabio Estevam <fabio.estevam at nxp.com>
> ---
>  arch/arm/mach-imx/hab.c | 33 +++++++++++++++++++++++++++++++++
>  1 file changed, 33 insertions(+)
> 
> diff --git a/arch/arm/mach-imx/hab.c b/arch/arm/mach-imx/hab.c
> index c730c8f..0c18b2e 100644
> --- a/arch/arm/mach-imx/hab.c
> +++ b/arch/arm/mach-imx/hab.c
> @@ -341,6 +341,31 @@ static int do_hab_failsafe(cmd_tbl_t *cmdtp, int flag, int argc,
>  	return 0;
>  }
>  
> +/*
> + * This routine takes a given address and applies a plus or minus offset to that
> + * address.
> + */
> +static int do_hab_get_ivt_addr(cmd_tbl_t *cmdtp, int flag, int argc,
> +			       char * const argv[])
> +{
> +	ulong	addr;
> +	long	ivt_offset;
> +
> +	if (argc < 3)
> +		return CMD_RET_USAGE;
> +
> +	if (!imx_hab_is_enabled())
> +		return CMD_RET_FAILURE;
> +
> +	addr = simple_strtoul(argv[1], NULL, 16);
> +	ivt_offset = simple_strtol(argv[2], NULL, 16);
> +	addr += ivt_offset;
> +
> +	env_set_hex("hab_ivt_addr", addr);
> +
> +	return CMD_RET_SUCCESS;
> +}
> +
>  U_BOOT_CMD(
>  		hab_status, CONFIG_SYS_MAXARGS, 1, do_hab_status,
>  		"display HAB status",
>
What does this function offer, that a
'setexpr hab_ivt_addr ${loadaddr} + 0x400' could not do as well?


Lothar Waßmann