On Tue, Jan 16, 2024 at 06:07:25PM +0100, Marco Felsch wrote:
> Add a new scratch storage slot for possible optee-hdr information which
> have to passed between barebox-pbl and barebox-proper. Reserve 512 bytes
> between the bootrom-log and the optee-hdr in case the bootrom-log need
> more space in the future.
>
> Signed-off-by: Marco Felsch <m.felsch@xxxxxxxxxxxxxx>
> ---
> arch/arm/mach-imx/scratch.c | 29 +++++++++++++++++++++++++++++
> include/mach/imx/scratch.h | 5 +++++
> 2 files changed, 34 insertions(+)
>
> diff --git a/arch/arm/mach-imx/scratch.c b/arch/arm/mach-imx/scratch.c
> index f4faff835c8c..6ba9b9d55b7d 100644
> --- a/arch/arm/mach-imx/scratch.c
> +++ b/arch/arm/mach-imx/scratch.c
> @@ -8,10 +8,13 @@
> #include <mach/imx/esdctl.h>
> #include <mach/imx/scratch.h>
> #include <memory.h>
> +#include <tee/optee.h>
> #include <pbl.h>
>
> struct imx_scratch_space {
> u32 bootrom_log[128];
> + u32 reserved[128]; /* reserve for bootrom log */
> + struct optee_header optee_hdr;
> };
>
> static struct imx_scratch_space *scratch;
> @@ -53,6 +56,32 @@ const u32 *imx8m_scratch_get_bootrom_log(void)
> return scratch->bootrom_log;
> }
>
> +void imx8m_scratch_save_optee_hdr(const struct optee_header *hdr)
> +{
> + size_t sz = sizeof(*hdr);
> +
> + if (!scratch) {
> + pr_err("No scratch area initialized, skip saving optee-hdr");
> + return;
> + }
> +
> + pr_debug("Saving optee-hdr to scratch area 0x%p\n", &scratch->optee_hdr);
> +
> + memcpy(&scratch->optee_hdr, hdr, sz);
> +}
> +
> +const struct optee_header *imx8m_scratch_get_optee_hdr(void)
> +{
> + if (!scratch) {
> + if (IN_PBL)
> + return ERR_PTR(-EINVAL);
> + else
> + scratch = (void *)arm_mem_scratch_get();
> + }
> +
> + return &scratch->optee_hdr;
> +}
These two function do not seem to be i.MX8 specific, I could reuse them
on i.MX9, so better with imx_ prefix?
Sascha
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