On Tue, Sep 05, 2023 at 04:26:48PM +0200, Ahmad Fatoum wrote:
> We have 32K of RAM at the end of the initial memory, where a
> prebootloader can place data for future use. i.MX8M is currently the
> only user and currently uses it to save the ROM API log, which is
> located in SRAM and is inaccessible by the time barebox proper runs
> in EL2. This area was so far not reserved, which can lead to clobbering
> it when chainloading barebox. Avoid this by requesting the region.
>
> Signed-off-by: Ahmad Fatoum <a.fatoum@xxxxxxxxxxxxxx>
> ---
> arch/arm/mach-imx/romapi.c | 10 ++++++++++
> 1 file changed, 10 insertions(+)
Applied, thanks
Sascha
>
> diff --git a/arch/arm/mach-imx/romapi.c b/arch/arm/mach-imx/romapi.c
> index 2fd803b0d998..aef0ff0534c9 100644
> --- a/arch/arm/mach-imx/romapi.c
> +++ b/arch/arm/mach-imx/romapi.c
> @@ -10,6 +10,8 @@
> #include <mach/imx/xload.h>
> #include <asm/barebox-arm.h>
> #include <zero_page.h>
> +#include <memory.h>
> +#include <init.h>
> #include <pbl.h>
>
> static int imx8m_bootrom_load(struct rom_api *rom_api, void *adr, size_t size)
> @@ -84,6 +86,14 @@ const u32 *imx8m_get_bootrom_log(void)
> return NULL;
> }
>
> +static int imx8m_reserve_scratch_area(void)
> +{
> + return PTR_ERR_OR_ZERO(request_sdram_region("scratch area",
> + (ulong)arm_mem_scratch_get(),
> + sizeof(struct imx_scratch_space)));
> +}
> +device_initcall(imx8m_reserve_scratch_area);
> +
> void imx8m_save_bootrom_log(void *dest)
> {
> const u32 *rom_log;
> --
> 2.39.2
>
>
>
--
Pengutronix e.K. | |
Steuerwalder Str. 21 | http://www.pengutronix.de/ |
31137 Hildesheim, Germany | Phone: +49-5121-206917-0 |
Amtsgericht Hildesheim, HRA 2686 | Fax: +49-5121-206917-5555 |
