Support for wolfBoot ZynqMP (UltraScale+ MPSoC) SD Card

Author: dgarske

.gitignore

@@ -343,3 +343,4 @@ image.ub
 *.pdi
 system-default.dtb
 test_output/
+sdcard.img

arch.mk

@@ -78,6 +78,7 @@ ifeq ($(ARCH),AARCH64)
       HASH_HAL=1
       CFLAGS+=-DWOLFBOOT_ZYNQMP_CSU
     endif
+
   endif
 
   ifeq ($(TARGET),versal)

config/examples/zynqmp_sdcard.config

@@ -0,0 +1,113 @@
+# wolfBoot configuration for AMD ZynqMP ZCU102 - SD Card Boot
+# Zynq UltraScale+ MPSoC ZU9EG - Quad-core ARM Cortex-A53
+#
+# This configuration enables SD card boot for the ZynqMP:
+#   FSBL -> PMUFW -> BL31 (EL3) -> wolfBoot (EL2) -> Linux (EL1)
+#
+# wolfBoot loads firmware images from MBR partitions on SD card.
+# Uses the generic SDHCI driver with SD1 controller (external SD slot on ZCU102).
+
+ARCH?=AARCH64
+TARGET?=zynq
+
+WOLFBOOT_VERSION?=0
+
+# RSA 4096-bit with SHA3-384 (matching existing zynqmp.config)
+SIGN?=RSA4096
+HASH?=SHA3
+IMAGE_HEADER_SIZE?=1024
+
+# Debug options
+DEBUG?=1
+DEBUG_SYMBOLS=1
+DEBUG_UART=1
+CFLAGS_EXTRA+=-DDEBUG_ZYNQ=1
+
+# SD card support - use SDHCI driver
+DISK_SDCARD?=1
+DISK_EMMC?=0
+# ZynqMP Arasan SDHCI does not support CDSS/CDTL card detect test level.
+# Since FSBL booted from the same SD card, we know it is present.
+CFLAGS_EXTRA+=-DSDHCI_FORCE_CARD_DETECT
+# Note: Arasan SDHCI v3.0 does not support HV4E mode. The platform layer
+# in hal/zynq.c transparently redirects SRS22/SRS23 to SRS00 for legacy SDMA.
+
+# Disable QSPI flash when using SD card
+EXT_FLASH?=0
+NO_XIP=1
+
+# ELF loading support
+ELF?=1
+
+# Boot Exception Level: transition from EL2 -> EL1 before jumping to app
+BOOT_EL1?=1
+
+# General options
+VTOR?=1
+CORTEX_M0?=0
+NO_ASM?=0
+ALLOW_DOWNGRADE?=0
+NVM_FLASH_WRITEONCE?=0
+V?=0
+SPMATH?=1
+RAM_CODE?=0
+DUALBANK_SWAP?=0
+PKA?=0
+WOLFTPM?=0
+
+# Toolchain
+USE_GCC=1
+CROSS_COMPILE=aarch64-none-elf-
+
+# ============================================================================
+# Partition Layout - MBR
+# ============================================================================
+# SD Card partition layout (MBR):
+#   Partition 1: boot   (128MB, FAT32 LBA, bootable) - BOOT.BIN
+#   Partition 2: OFP_A  (200MB, Linux)               - Primary signed image
+#   Partition 3: OFP_B  (200MB, Linux)               - Update signed image
+#   Partition 4: rootfs (remainder)                  - Linux root filesystem
+#
+# Use partition numbers instead of flash addresses
+# These are 0-based indices into the parsed partition array:
+#   part[0]=boot, part[1]=OFP_A, part[2]=OFP_B, part[3]=rootfs
+WOLFBOOT_NO_PARTITIONS=1
+CFLAGS_EXTRA+=-DBOOT_PART_A=1
+CFLAGS_EXTRA+=-DBOOT_PART_B=2
+
+# Disk read chunk size (512KB)
+CFLAGS_EXTRA+=-DDISK_BLOCK_SIZE=0x80000
+
+# Linux rootfs is on partition 4 (SD1 = mmcblk1)
+CFLAGS_EXTRA+=-DLINUX_BOOTARGS_ROOT=\"/dev/mmcblk1p4\"
+
+# ============================================================================
+# Boot Memory Layout
+# ============================================================================
+# wolfBoot runs from DDR at 0x8000000 (same as U-Boot, loaded via BL31)
+WOLFBOOT_ORIGIN=0x8000000
+
+# Load Partition to RAM Address (Linux kernel loads here)
+WOLFBOOT_LOAD_ADDRESS?=0x10000000
+
+# DTS (Device Tree) load address
+WOLFBOOT_LOAD_DTS_ADDRESS?=0x1000
+
+# ============================================================================
+# Required for test-app (even with WOLFBOOT_NO_PARTITIONS=1)
+# ============================================================================
+WOLFBOOT_PARTITION_BOOT_ADDRESS=0x80200000
+WOLFBOOT_PARTITION_SIZE=0x4000000
+WOLFBOOT_SECTOR_SIZE=0x1000
+
+# ============================================================================
+# Optional Debug Options (uncomment to enable)
+# ============================================================================
+# SDHCI driver debug logs
+#CFLAGS_EXTRA+=-DDEBUG_SDHCI
+# Disk layer debug logs
+#CFLAGS_EXTRA+=-DDEBUG_DISK
+# GPT partition debug logs
+#CFLAGS_EXTRA+=-DDEBUG_GPT
+# Disk read/write test at boot
+#CFLAGS_EXTRA+=-DDISK_TEST