new file mode 100644
@@ -0,0 +1,68 @@
+From c7df098a71e05dc81cee818747759e8060b59626 Mon Sep 17 00:00:00 2001
+From: Luca Ceresoli <luca@lucaceresoli.net>
+Date: Mon, 4 Jun 2018 12:21:01 +0200
+Subject: [PATCH] arm64: zynqmp: accept an absolute path for PMUFW_INIT_FILE
+
+The value of PMUFW_INIT_FILE is prefixed with "$(srctree)/", thus
+forcing it to be a relative path inside the U-Boot source tree. Since
+the PMUFW is a binary file generated outside of U-Boot, the PMUFW
+binary must be copied inside the U-Boot source tree before the
+build.
+
+This generates a few problems:
+
+ * if the source tree is shared among different out-of-tree builds,
+ they will pollute (and potentially corrupt) each other
+ * the source tree cannot be read-only
+ * any buildsystem must add a command to copy the PMUFW binary
+ * putting an externally-generated binary in the source tree is ugly
+ as hell
+
+Avoid these problems by accepting an absolute path for
+PMUFW_INIT_FILE. This would be as simple as removing the "$(srctree)/"
+prefix, but in order to keep backward compatibility we rather use the
+shell and readlink to get the absolute path even when starting from a
+relative path.
+
+Since 'readlink -f' produces an empty string if the file does not
+exist, we also add a check to ensure the file configured in
+PMUFW_INIT_FILE exists. Otherwise the build would exit successfully,
+but produce a boot.bin without PMUFW as if PMUFW_INIT_FILE were empty.
+
+Tested in the 12 possible combinations of:
+ - PMUFW_INIT_FILE empty, relative, absolute, non-existing
+ - building in-tree, in subdir, in other directory
+
+Signed-off-by: Luca Ceresoli <luca@lucaceresoli.net>
+Cc: Michal Simek <michal.simek@xilinx.com>
+Cc: Simon Glass <sjg@chromium.org>
+Cc: Emmanuel Vadot <manu@bidouilliste.com>
+Signed-off-by: Michal Simek <michal.simek@xilinx.com>
+Backported from upstream: https://git.denx.de/?p=u-boot.git;a=commit;h=c7df098a71e05dc81cee818747759e8060b59626
+---
+ scripts/Makefile.spl | 8 +++++++-
+ 1 file changed, 7 insertions(+), 1 deletion(-)
+
+diff --git a/scripts/Makefile.spl b/scripts/Makefile.spl
+index ef018b5b4056..252f13826d4c 100644
+--- a/scripts/Makefile.spl
++++ b/scripts/Makefile.spl
+@@ -167,8 +167,14 @@ ifdef CONFIG_ARCH_ZYNQ
+ MKIMAGEFLAGS_boot.bin = -T zynqimage -R $(srctree)/$(CONFIG_BOOT_INIT_FILE)
+ endif
+ ifdef CONFIG_ARCH_ZYNQMP
++ifneq ($(CONFIG_PMUFW_INIT_FILE),"")
++spl/boot.bin: zynqmp-check-pmufw
++zynqmp-check-pmufw: FORCE
++ ( cd $(srctree) && test -r $(CONFIG_PMUFW_INIT_FILE) ) \
++ || ( echo "Cannot read $(CONFIG_PMUFW_INIT_FILE)" && false )
++endif
+ MKIMAGEFLAGS_boot.bin = -T zynqmpimage -R $(srctree)/$(CONFIG_BOOT_INIT_FILE) \
+- -n $(srctree)/$(CONFIG_PMUFW_INIT_FILE)
++ -n "$(shell cd $(srctree); readlink -f $(CONFIG_PMUFW_INIT_FILE))"
+ endif
+
+ spl/boot.bin: $(obj)/u-boot-spl.bin FORCE
+--
+2.7.4
+
@@ -373,6 +373,20 @@ config BR2_TARGET_UBOOT_ZYNQMP
if BR2_TARGET_UBOOT_ZYNQMP
+config BR2_TARGET_UBOOT_ZYNQMP_PMUFW
+ string "PMU firmware location"
+ depends on BR2_TARGET_UBOOT_BUILD_SYSTEM_KCONFIG
+ help
+ Location of a PMU firmware binary.
+
+ If set to an URL or a file path, instructs the U-Boot build
+ process to generate a boot.bin (to be loaded by the ZynqMP
+ boot ROM) containing both the U-Boot SPL and the PMU
+ firmware in the Xilinx-specific boot format.
+
+ If empty, the generated boot.bin will not contain a PMU
+ firmware.
+
config BR2_TARGET_UBOOT_ZYNQMP_PSU_INIT_FILE
string "Custom psu_init_gpl file"
depends on BR2_TARGET_UBOOT_BUILD_SYSTEM_KCONFIG
@@ -276,6 +276,17 @@ endef
ifeq ($(BR2_TARGET_UBOOT_ZYNQMP),y)
+UBOOT_ZYNQMP_PMUFW = $(call qstrip,$(BR2_TARGET_UBOOT_ZYNQMP_PMUFW))
+
+ifneq ($(UBOOT_ZYNQMP_PMUFW),)
+UBOOT_EXTRA_DOWNLOADS += $(UBOOT_ZYNQMP_PMUFW)
+BR_NO_CHECK_HASH_FOR += $(notdir $(UBOOT_ZYNQMP_PMUFW))
+define UBOOT_ZYNQMP_KCONFIG_PMUFW
+ $(call KCONFIG_SET_OPT,CONFIG_PMUFW_INIT_FILE,"$(UBOOT_DL_DIR)/$(notdir $(UBOOT_ZYNQMP_PMUFW))", \
+ $(@D)/.config)
+endef
+endif
+
ifneq ($(call qstrip,$(BR2_TARGET_UBOOT_ZYNQMP_PSU_INIT_FILE)),)
define UBOOT_ZYNQMP_KCONFIG_PSU_INIT
$(call KCONFIG_SET_OPT,CONFIG_XILINX_PS_INIT_FILE,"$(TOPDIR)/$(call qstrip,$(BR2_TARGET_UBOOT_ZYNQMP_PSU_INIT_FILE))", \
@@ -335,6 +346,7 @@ UBOOT_POST_INSTALL_IMAGES_HOOKS += UBOOT_CRC_ALTERA_SOCFPGA_IMAGE
endif
define UBOOT_KCONFIG_FIXUP_CMDS
+ $(UBOOT_ZYNQMP_KCONFIG_PMUFW)
$(UBOOT_ZYNQMP_KCONFIG_PSU_INIT)
endef
In order to boot on the Xilinx ZynqMP SoCs, U-Boot SPL requires a recent PMU firmware loaded. Instruct U-Boot to add pmufw.bin to the boot.bin file together with U-Boot SPL, and the boot ROM will load both. For this to work properly, a patch to U-Boot is needed. However this patch must be applied by each defconfig that wishes to use BR2_TARGET_UBOOT_ZYNQMP_PMUFW. If it were in boot/uboot/ to be applied unconditionally, it would break the build for configs using a U-Boot version higher than 2018.7-rc1 where the patch is already applied. Signed-off-by: Luca Ceresoli <luca@lucaceresoli.net> --- Changes v3 -> v4: - don't copy the pmufw binary in the source tree, use an absolute path to the download dir (which needs a patch from upstream to work) - depend on BR2_TARGET_UBOOT_BUILD_SYSTEM_KCONFIG (Thomas) Changes v2 -> v3: - don't use a "zynqmp-pmufw-binaries" package, just download a file - define kconfig fixups in a variable, then define UBOOT_KCONFIG_FIXUP_CMDS unconditionally at global scope (Thomas) - use $(INSTALL), not cp (Thomas) - $(...) instead of ${...} to reference make variables (Thomas) Changes v1 -> v2: - split from a larger patch doing 2 things. --- ...p-accept-an-absolute-path-for-PMUFW_INIT_.patch | 68 ++++++++++++++++++++++ boot/uboot/Config.in | 14 +++++ boot/uboot/uboot.mk | 12 ++++ 3 files changed, 94 insertions(+) create mode 100644 board/zynqmp/patches/uboot/0003-arm64-zynqmp-accept-an-absolute-path-for-PMUFW_INIT_.patch