[PATCH v2 22/28] arm: rockchip: rv1126: Set dram area unsecure for SPL

[Kever Yang]

On 2022/8/18 22:52, Jagan Teki wrote:
> Unsecure the dram area so that MMC, USB, and SFC controllers
> can able to read data from dram.
>
> Signed-off-by: Jason Zhu <jason.zhu at rock-chips.com>
> Signed-off-by: Jagan Teki <jagan at edgeble.ai>
Reviewed-by: Kever Yang <kever.yang at rock-chips.com>

Thanks,
- Kever
> ---
> Changes for v2:
> - use IS_ENABLED
>
>   arch/arm/mach-rockchip/rv1126/rv1126.c | 12 ++++++++++++
>   1 file changed, 12 insertions(+)
>
> diff --git a/arch/arm/mach-rockchip/rv1126/rv1126.c b/arch/arm/mach-rockchip/rv1126/rv1126.c
> index 91554c98b6..b9b898756f 100644
> --- a/arch/arm/mach-rockchip/rv1126/rv1126.c
> +++ b/arch/arm/mach-rockchip/rv1126/rv1126.c
> @@ -10,6 +10,8 @@
>   #include <asm/arch-rockchip/hardware.h>
>   #include <asm/arch-rockchip/grf_rv1126.h>
>   
> +#define FIREWALL_APB_BASE	0xffa60000
> +#define FW_DDR_CON_REG		0x80
>   #define GRF_BASE		0xFE000000
>   
>   const char * const boot_devices[BROM_LAST_BOOTSOURCE + 1] = {
> @@ -58,6 +60,16 @@ void board_debug_uart_init(void)
>   #ifndef CONFIG_TPL_BUILD
>   int arch_cpu_init(void)
>   {
> +	/**
> +	 * Set dram area unsecure in spl
> +	 *
> +	 * usb & mmc & sfc controllers can read data to dram
> +	 * since they are unsecure.
> +	 * (Note: only secure-world can access this register)
> +	 */
> +	if (IS_ENABLED(CONFIG_SPL_BUILD))
> +		writel(0, FIREWALL_APB_BASE + FW_DDR_CON_REG);
> +
>   	return 0;
>   }
>   #endif