[U-Boot] [PATCH v2 3/4] riscv: prior_stage_fdt_address should only be used when OF_PRIOR_STAGE is enabled

[Auer, Lukas <lukas.auer@aisec.fraunhofer.de>]

Hi Rick,

On Wed, 2019-04-24 at 14:33 +0800, Andes wrote:
> From: Rick Chen <rick@andestech.com>
> 
> This patch will fix prior_stage_fdt_address write failure problem, when
> AE350 was booting from flash.
> 
> When AE350 was booting from falsh, prior_stage_fdt_address will be in

nit: should be flash

> flash address, we shall avoid it to be written.
> 
> Signed-off-by: Rick Chen <rick@andestech.com>
> Cc: Greentime Hu <greentime@andestech.com>
> ---
>  arch/riscv/cpu/cpu.c   | 2 ++
>  arch/riscv/cpu/start.S | 2 ++
>  2 files changed, 4 insertions(+)
> 
> diff --git a/arch/riscv/cpu/cpu.c b/arch/riscv/cpu/cpu.c
> index 768c44c..a17d37f 100644
> --- a/arch/riscv/cpu/cpu.c
> +++ b/arch/riscv/cpu/cpu.c
> @@ -15,7 +15,9 @@
>   * The variables here must be stored in the data section since they are used
>   * before the bss section is available.
>   */
> +#  if CONFIG_IS_ENABLED(OF_PRIOR_STAGE)
>  phys_addr_t prior_stage_fdt_address __attribute__((section(".data")));
> +#endif
>  #ifndef CONFIG_XIP
>  u32 hart_lottery __attribute__((section(".data"))) = 0;
>  /*
> diff --git a/arch/riscv/cpu/start.S b/arch/riscv/cpu/start.S
> index 41d9a32..9ede1a7 100644
> --- a/arch/riscv/cpu/start.S
> +++ b/arch/riscv/cpu/start.S
> @@ -111,7 +111,9 @@ call_board_init_f_0:
>  	bnez	tp, secondary_hart_loop
>  #endif
>  
> +#  if CONFIG_IS_ENABLED(OF_PRIOR_STAGE)
>  	la	t0, prior_stage_fdt_address
> +#endif
>  	SREG	s1, 0(t0)

The SREG instruction must also be inside the ifdef here.

Thanks,
Lukas

>  
>  	jal	board_init_f_init_reserve