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zynqmp: Disable secure access for boot devices

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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.anderson@linux.dev>
Link: https://lore.kernel.org/r/20240905171833.325548-2-sean.anderson@linux.dev
Signed-off-by: Michal Simek <michal.simek@amd.com>
This commit is contained in:
Sean Anderson 2024-09-05 13:18:32 -04:00 committed by Michal Simek
parent 8ef2deefc5
commit 35142be560
2 changed files with 6 additions and 0 deletions
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2
arch/arm/mach-zynqmp/include/mach/hardware.h
View File

@ -67,6 +67,8 @@ 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

4
board/xilinx/zynqmp/zynqmp.c
View File

@ -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(0x00920492, ZYNQMP_IOU_SECURE_SLCR + 4);
/* Delay is required for clocks to be propagated */
udelay(1000000);