[PATCH 5/7] ddr: altera: arria10: Add RAM size check

[Marek Vasut]

On 4/15/20 11:00 AM, Ley Foon Tan wrote:
> Add call to get_ram_size() function to check memory range
> for valid RAM.
> 
> Signed-off-by: Ley Foon Tan <ley.foon.tan at intel.com>
> ---
>  drivers/ddr/altera/sdram_arria10.c | 25 ++++++++++++++++++++++++-
>  1 file changed, 24 insertions(+), 1 deletion(-)
> 
> diff --git a/drivers/ddr/altera/sdram_arria10.c b/drivers/ddr/altera/sdram_arria10.c
> index 6b74423ea789..e3f11984a978 100644
> --- a/drivers/ddr/altera/sdram_arria10.c
> +++ b/drivers/ddr/altera/sdram_arria10.c
> @@ -8,6 +8,7 @@
>  #include <dm.h>
>  #include <errno.h>
>  #include <fdtdec.h>
> +#include <hang.h>
>  #include <malloc.h>
>  #include <ram.h>
>  #include <reset.h>
> @@ -17,7 +18,7 @@
>  #include <asm/arch/fpga_manager.h>
>  #include <asm/arch/misc.h>
>  #include <dm/device_compat.h>
> -#include <linux/kernel.h>
> +#include <linux/sizes.h>
>  
>  #include "sdram_arria10.h"
>  
> @@ -671,6 +672,27 @@ static int ddr_calibration_sequence(struct altera_sdram_platdata *plat)
>  	return 0;
>  }
>  
> +static void sdram_size_check(struct ram_info *ram)
> +{
> +	phys_size_t ram_check = 0;
> +	phys_size_t size = ram->size;
> +	phys_addr_t base = ram->base;
> +
> +	debug("DDR: Running SDRAM size sanity check\n");
> +
> +	while (ram_check < size) {
> +		ram_check += get_ram_size((void *)(base + ram_check),
> +					 (phys_size_t)SZ_1G);

Why is it running in 1 GiB steps ?