[PATCH] Basic lwIP for STM32H7 BSP

[Sebastian Huber]

On 02/02/2021 20:10, Robin Mueller wrote:

> +	/* Not an ideal solution but required for lwIP on the STM32H7 BSP.
> +	This places the DMA descriptors for lwIP at the start of SRAM3.
> +	The MPU still needs to be configured for the DMA descriptor regions to be
> +	bufferable, non-cacheable, non-shareable (first 256 bytes) */
> +	.lwip_sec_stm32h7 (NOLOAD) : ALIGN_WITH_INPUT {
> +		. = ABSOLUTE(0x30040000);
> +		*(.RxDecripSection)
> +		. = ABSOLUTE(0x30040060);
> +		*(.TxDecripSection)
> +		. = ABSOLUTE(0x30040200);
> +		*(.RxArraySection)
> +	} >SRAM_3 AT> REGION_TEXT_LOAD
> +

This is the wrong linker command file. This stuff should be in

spec/build/bsps/arm/stm32h7/linkcmdsmemory.yml

with an output section name like ".stm32h7_sram_3" and corresponding 
input section names. Why do you need absolute addresses here?

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