On 8/13/24 00:07, Sean Anderson wrote:
Boot devices (QSPI, MMC, NAND, and Ethernet) use secure access for DMA by default. As this causes problems when using the SMMU [1], configure them for normal access instead. [1] https://support.xilinx.com/s/article/72164 Signed-off-by: Sean Anderson <sean.ander...@linux.dev> --- arch/arm/mach-zynqmp/include/mach/hardware.h | 2 ++ board/xilinx/zynqmp/zynqmp.c | 4 ++++ 2 files changed, 6 insertions(+) diff --git a/arch/arm/mach-zynqmp/include/mach/hardware.h b/arch/arm/mach-zynqmp/include/mach/hardware.h index 8cb6494e52c..f1514d6a869 100644 --- a/arch/arm/mach-zynqmp/include/mach/hardware.h +++ b/arch/arm/mach-zynqmp/include/mach/hardware.h @@ -63,6 +63,8 @@ struct crlapb_regs { #define crlapb_base ((struct crlapb_regs *)ZYNQMP_CRL_APB_BASEADDR) +#define ZYNQMP_IOU_SECURE_SLCR 0xFF240000 + #define ZYNQMP_IOU_SCNTR_SECURE 0xFF260000 #define ZYNQMP_IOU_SCNTR_COUNTER_CONTROL_REGISTER_EN 0x1 #define ZYNQMP_IOU_SCNTR_COUNTER_CONTROL_REGISTER_HDBG 0x2 diff --git a/board/xilinx/zynqmp/zynqmp.c b/board/xilinx/zynqmp/zynqmp.c index b4c15b041cc..94a66684af2 100644 --- a/board/xilinx/zynqmp/zynqmp.c +++ b/board/xilinx/zynqmp/zynqmp.c @@ -72,6 +72,10 @@ int __maybe_unused psu_uboot_init(void) writel(ZYNQMP_PS_SYSMON_ANALOG_BUS_VAL, ZYNQMP_AMS_PS_SYSMON_ANALOG_BUS); + /* Disable secure access for boot devices */ + writel(0x04920492, ZYNQMP_IOU_SECURE_SLCR); + writel(0x04920492, ZYNQMP_IOU_SECURE_SLCR + 4);
Based on https://docs.amd.com/r/en-US/ug1087-zynq-ultrascale-registers/IOU_AXI_RPRTCN-IOU_SECURE_SLCR-Register there is no definition for bits 27:25 that's why that upper 4 shouldn't be there. Thanks, Michal
