[U-Boot] [PATCH v4 5/9] armv8: ls2080a: Declare spin tables as reserved for efi loader

[Prabhakar Kushwaha]

Hi Alex,


> -----Original Message-----
> From: Alexander Graf [mailto:agraf at suse.de]
> Sent: Tuesday, June 21, 2016 4:37 AM
> To: u-boot at lists.denx.de
> Cc: york sun <york.sun at nxp.com>; Prabhakar Kushwaha
> <prabhakar.kushwaha at nxp.com>
> Subject: [PATCH v4 5/9] armv8: ls2080a: Declare spin tables as reserved for
> efi loader
> 
> The efi loader code has its own memory map, so it needs to be aware where
> the spin tables are located, to ensure that no code writes into those regions.
> 
> Signed-off-by: Alexander Graf <agraf at suse.de>
> ---
>  arch/arm/cpu/armv8/fsl-layerscape/fdt.c | 6 ++++++
>  1 file changed, 6 insertions(+)
> 
> diff --git a/arch/arm/cpu/armv8/fsl-layerscape/fdt.c
> b/arch/arm/cpu/armv8/fsl-layerscape/fdt.c
> index d17227a..91d6374 100644
> --- a/arch/arm/cpu/armv8/fsl-layerscape/fdt.c
> +++ b/arch/arm/cpu/armv8/fsl-layerscape/fdt.c
> @@ -5,6 +5,7 @@
>   */
> 
>  #include <common.h>
> +#include <efi_loader.h>
>  #include <libfdt.h>
>  #include <fdt_support.h>
>  #include <phy.h>
> @@ -72,6 +73,11 @@ void ft_fixup_cpu(void *blob)
> 
>  	fdt_add_mem_rsv(blob, (uintptr_t)&secondary_boot_code,
>  			*boot_code_size);
> +#ifdef CONFIG_EFI_LOADER
> +	efi_add_memory_map((uintptr_t)&secondary_boot_code,
> +			   ALIGN(*boot_code_size, EFI_PAGE_SIZE) >>
> EFI_PAGE_SHIFT,
> +			   EFI_RESERVED_MEMORY_TYPE, false); #endif
>  }
>  #endif

I believe this place(during DTS fix-up) is too late for  adding this memory in EFI memory map. 
Not sure, grub2 user may write this memory before launching Linux.

--prabhakar