On 15.04.2020, at 05:25, Deepak Das deepakdas.linux@gmail.com wrote:
adapting commit fa2047c47310 ("rockchip: rk3328: enable spl-fifo-mode for emmc and sdmmc") for rk3399. Since mmc to sram can't do dma, add patch to prevent aborts transferring TF-A parts.
Signed-off-by: Deepak Das deepakdas.linux@gmail.com
arch/arm/dts/rk3399-u-boot.dtsi | 3 +++ 1 file changed, 3 insertions(+)
diff --git a/arch/arm/dts/rk3399-u-boot.dtsi b/arch/arm/dts/rk3399-u-boot.dtsi index 8b857ccfc7..3ad824450e 100644 --- a/arch/arm/dts/rk3399-u-boot.dtsi +++ b/arch/arm/dts/rk3399-u-boot.dtsi @@ -84,6 +84,9 @@
&sdmmc { u-boot,dm-pre-reloc;
- /* mmc to sram can't do dma, prevent aborts transferring TF-A parts */
- u-boot,spl-fifo-mode;
Most transfers in SPL mode will occur to RAM (i.e. most of TF-A and the full U-Boot), so this is a heavy-handed solution for a problem affecting only some transfers.
Can’t this be solved using bounce buffers? You will need to check if the target address cross the inaccessible memory regions and—if and only if—send these payloads through a bounce buffer...
};
&spi1 {
2.17.1