[PATCH v2 04/34] ARM: put scratch mem area below OP-TEE

[Ahmad Fatoum]

On 17.05.23 11:03, Sascha Hauer wrote:
> We want to reserve memory for OP-TEE at the end of available SDRAM,
> so move the scratch area below OP-TEE and not above.
> 
> Signed-off-by: Sascha Hauer <s.hauer at pengutronix.de>
> ---
>  arch/arm/include/asm/barebox-arm.h | 4 ++--
>  1 file changed, 2 insertions(+), 2 deletions(-)
> 
> diff --git a/arch/arm/include/asm/barebox-arm.h b/arch/arm/include/asm/barebox-arm.h
> index f446044be6..6e6606d005 100644
> --- a/arch/arm/include/asm/barebox-arm.h
> +++ b/arch/arm/include/asm/barebox-arm.h
> @@ -71,14 +71,14 @@ static inline void arm_fixup_vectors(void)
>  
>  void *barebox_arm_boot_dtb(void);
>  
> -#define arm_mem_scratch(endmem) ((endmem) - SZ_32K)
> +#define arm_mem_scratch(endmem) ((endmem) - OPTEE_SIZE - SZ_32K)
>  
>  static inline const void *arm_mem_scratch_get(void)
>  {
>  	return (const void *)arm_mem_scratch(arm_mem_endmem_get());
>  }
>  
> -#define arm_mem_stack_top(endmem) ((endmem) - SZ_64K - OPTEE_SIZE)
> +#define arm_mem_stack_top(endmem) ((endmem) - SZ_64K)

I don't understand why you drop OPTEE_SIZE here. Wouldn't the stack
now eat into the OP-TEE region?

>  
>  static inline unsigned long arm_mem_stack(unsigned long endmem)
>  {

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