From: Luca Ceresoli Date: Wed, 25 Jul 2018 14:35:38 +0000 (+0200) Subject: uboot: zynqmp: allow to use custom psu_init files X-Git-Url: https://git.libre-soc.org/?a=commitdiff_plain;h=822c34c301986a91a24e6525df9a13aa8be1ba9c;p=buildroot.git uboot: zynqmp: allow to use custom psu_init files U-Boot SPL configures pinmuxes, clocks and other low-level devices. On the Xilinx ZynqMP SoCs the code to do this resides in a file called psu_init_gpl.c which is initially generated by the Xilinx development tools. Add an option to pass these files from the outside (e.g. in the board files). For this to work properly, a patch to U-Boot is needed. However this patch must be applied by each defconfig using BR2_TARGET_UBOOT_ZYNQMP_PSU_INIT_DIR. If it were in boot/uboot/ to be applied unconditionally, it would break the build for configs using a U-Boot version where the patch is already applied. Signed-off-by: Luca Ceresoli Cc: Joel Carlson Reviewed-by: Joel Carlson Tested-by: Joel Carlson [Thomas: add comment about U-Boot version requirements to use this option.] Signed-off-by: Thomas Petazzoni --- diff --git a/board/zynqmp/patches/uboot/0004-arm-arm64-zynq-zynqmp-pass-the-PS-init-file-as-a-kco.patch b/board/zynqmp/patches/uboot/0004-arm-arm64-zynq-zynqmp-pass-the-PS-init-file-as-a-kco.patch new file mode 100644 index 0000000000..b32e162780 --- /dev/null +++ b/board/zynqmp/patches/uboot/0004-arm-arm64-zynq-zynqmp-pass-the-PS-init-file-as-a-kco.patch @@ -0,0 +1,175 @@ +From 4c9d54ab5a41d65000c8d249b6fb1b76056f1812 Mon Sep 17 00:00:00 2001 +From: Luca Ceresoli +Date: Wed, 20 Jun 2018 12:11:50 +0200 +Subject: [PATCH] arm/arm64: zynq/zynqmp: pass the PS init file as a kconfig + variable + +U-Boot needs to link ps7_init_gpl.c on Zynq or psu_init_gpl.c on +ZynqMP (PS init for short). The current logic to locate this file for +both platforms is: + + 1. if a board-specific file exists in + board/xilinx/zynq[mp]/$(CONFIG_DEFAULT_DEVICE_TREE)/ps?_init_gpl.c + then use it + 2. otherwise use board/xilinx/zynq/ps?_init_gpl.c + +In the latter case the file does not exist in the U-Boot sources and +must be copied in the source tree from the outside before starting the +build. This is typical when it is generated from Xilinx tools while +developing a custom hardware. However making sure that a +board-specific file is _not_ found (and used) requires some trickery +such as removing or overwriting all PS init files (e.g.: the current +meta-xilinx yocto layer [0]). + +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 PS init file binary + * overwriting or deleting files in the source tree is ugly as hell + +Simplify usage by allowing to pass the path to the desired PS init +file in kconfig variable XILINX_PS_INIT_FILE. It can be an absolute +path or relative to $(srctree). If the variable is set, the +user-specified file will always be used without being copied +around. If the the variable is left empty, for backward compatibility +fall back to the old behaviour. + +Since the issue is the same for Zynq and ZynqMP, add one kconfig +variable in a common place and use it for both. + +Also use the new kconfig help text to document all the ways to give +U-Boot the PS init file. + +Build-tested with all combinations of: + - platform: zynq or zynqmp + - PS init file: from XILINX_PS_INIT_FILE (absolute, relative path, + non-existing), in-tree board-specific, in board/xilinx/zynq[mp]/ + - building in-tree, in subdir, in other directory + +[0] https://github.com/Xilinx/meta-xilinx/blob/b2f74cc7fe5c4881589d5e440a17cb51fc66a7ab/meta-xilinx-bsp/recipes-bsp/u-boot/u-boot-spl-zynq-init.inc#L9 + +Signed-off-by: Luca Ceresoli +Cc: Albert Aribaud +Cc: Michal Simek +Cc: Nathan Rossi +Backported from upstream: https://git.denx.de/?p=u-boot.git;a=commit;h=6da4f67ad09cd8b311d77b2b04e557b7ef65b56c +--- + arch/arm/Kconfig | 1 + + board/xilinx/Kconfig | 41 +++++++++++++++++++++++++++++++++++++++++ + board/xilinx/zynq/Makefile | 10 +++++++++- + board/xilinx/zynqmp/Makefile | 10 +++++++++- + 4 files changed, 60 insertions(+), 2 deletions(-) + create mode 100644 board/xilinx/Kconfig + +diff --git a/arch/arm/Kconfig b/arch/arm/Kconfig +index 22234cde2ab6..e04979d0ef7e 100644 +--- a/arch/arm/Kconfig ++++ b/arch/arm/Kconfig +@@ -1293,4 +1293,5 @@ source "board/technologic/ts4600/Kconfig" + source "board/vscom/baltos/Kconfig" + source "board/woodburn/Kconfig" + source "board/work-microwave/work_92105/Kconfig" ++source "board/xilinx/Kconfig" + source "board/zipitz2/Kconfig" + + source "arch/arm/Kconfig.debug" +diff --git a/board/xilinx/Kconfig b/board/xilinx/Kconfig +new file mode 100644 +index 000000000000..aa3fa061edef +--- /dev/null ++++ b/board/xilinx/Kconfig +@@ -0,0 +1,41 @@ ++# Copyright (c) 2018, Luca Ceresoli ++# ++# SPDX-License-Identifier: GPL-2.0 ++ ++if ARCH_ZYNQ || ARCH_ZYNQMP ++ ++config XILINX_PS_INIT_FILE ++ string "Zynq/ZynqMP PS init file(s) location" ++ help ++ On Zynq and ZynqMP U-Boot SPL (or U-Boot proper if ++ ZYNQMP_PSU_INIT_ENABLED is set) is responsible for some ++ basic initializations, such as enabling peripherals and ++ configuring pinmuxes. The PS init file (called ++ psu_init_gpl.c on ZynqMP, ps7_init_gpl.c for Zynq-7000) ++ contains the code for such initializations. ++ ++ U-Boot contains PS init files for some boards, but each of ++ them describes only one specific configuration. Users of a ++ different board, or needing a different configuration, can ++ generate custom files using the Xilinx development tools. ++ ++ There are three ways to give a PS init file to U-Boot: ++ ++ 1. Set this variable to the path, either relative to the ++ source tree or absolute, where the psu_init_gpl.c or ++ ps7_init_gpl.c file is located. U-Boot will build this ++ file. ++ ++ 2. If you leave an empty string here, U-Boot will use ++ board/xilinx/zynq/$(CONFIG_DEFAULT_DEVICE_TREE)/ps7_init_gpl.c ++ for Zynq-7000, or ++ board/xilinx/zynqmp/$(CONFIG_DEFAULT_DEVICE_TREE)/psu_init_gpl.c ++ for ZynqMP. ++ ++ 3. If the above file does not exist, U-Boot will use ++ board/xilinx/zynq/ps7_init_gpl.c for Zynq-7000, or ++ board/xilinx/zynqmp/psu_init_gpl.c for ZynqMP. This file ++ is not provided by U-Boot, you have to copy it there ++ before the build. ++ ++endif +diff --git a/board/xilinx/zynq/Makefile b/board/xilinx/zynq/Makefile +index 5a76a26720cd..03ad5f0532ee 100644 +--- a/board/xilinx/zynq/Makefile ++++ b/board/xilinx/zynq/Makefile +@@ -5,10 +5,18 @@ + + obj-y := board.o + +-hw-platform-y :=$(shell echo $(CONFIG_DEFAULT_DEVICE_TREE)) ++ifneq ($(CONFIG_XILINX_PS_INIT_FILE),"") ++PS_INIT_FILE := $(shell cd $(srctree); readlink -f $(CONFIG_XILINX_PS_INIT_FILE)) ++init-objs := ps_init_gpl.o ++spl/board/xilinx/zynq/ps_init_gpl.o board/xilinx/zynq/ps_init_gpl.o: $(PS_INIT_FILE) ++ $(CC) $(c_flags) -I $(srctree)/$(src) -c -o $@ $^ ++endif + ++ifeq ($(init-objs),) ++hw-platform-y :=$(shell echo $(CONFIG_DEFAULT_DEVICE_TREE)) + init-objs := $(if $(wildcard $(srctree)/$(src)/$(hw-platform-y)/ps7_init_gpl.c),\ + $(hw-platform-y)/ps7_init_gpl.o) ++endif + + ifeq ($(init-objs),) + ifneq ($(wildcard $(srctree)/$(src)/ps7_init_gpl.c),) +diff --git a/board/xilinx/zynqmp/Makefile b/board/xilinx/zynqmp/Makefile +index 05ccd25dcef3..960b81fc5853 100644 +--- a/board/xilinx/zynqmp/Makefile ++++ b/board/xilinx/zynqmp/Makefile +@@ -5,10 +5,18 @@ + + obj-y := zynqmp.o + +-hw-platform-y :=$(shell echo $(CONFIG_DEFAULT_DEVICE_TREE)) ++ifneq ($(CONFIG_XILINX_PS_INIT_FILE),"") ++PS_INIT_FILE := $(shell cd $(srctree); readlink -f $(CONFIG_XILINX_PS_INIT_FILE)) ++init-objs := ps_init_gpl.o ++spl/board/xilinx/zynqmp/ps_init_gpl.o board/xilinx/zynqmp/ps_init_gpl.o: $(PS_INIT_FILE) ++ $(CC) $(c_flags) -I $(srctree)/$(src) -c -o $@ $^ ++endif + ++ifeq ($(init-objs),) ++hw-platform-y :=$(shell echo $(CONFIG_DEFAULT_DEVICE_TREE)) + init-objs := $(if $(wildcard $(srctree)/$(src)/$(hw-platform-y)/psu_init_gpl.c),\ + $(hw-platform-y)/psu_init_gpl.o) ++endif + + ifeq ($(init-objs),) + ifneq ($(wildcard $(srctree)/$(src)/psu_init_gpl.c),) +-- +2.7.4 + diff --git a/boot/uboot/Config.in b/boot/uboot/Config.in index 124991d20b..8e369cec04 100644 --- a/boot/uboot/Config.in +++ b/boot/uboot/Config.in @@ -397,6 +397,33 @@ config BR2_TARGET_UBOOT_ZYNQMP_PMUFW This feature requires U-Boot >= 2018.07. +config BR2_TARGET_UBOOT_ZYNQMP_PSU_INIT_FILE + string "Custom psu_init_gpl file" + depends on BR2_TARGET_UBOOT_BUILD_SYSTEM_KCONFIG + help + On ZynqMP the booloader is responsible for some basic + initializations, such as enabling peripherals and + configuring pinmuxes. The psu_init_gpl.c file (and, + optionally, psu_init_gpl.h) contains the code for such + initializations. + + Although U-Boot contains psu_init_gpl.c files for some + boards, each of them describes only one specific + configuration. Users of a different board, or needing a + different configuration, can generate custom files using the + Xilinx development tools. + + Set this variable to the path to your psu_init_gpl.c file + (e.g. "board/myboard/psu_init_gpl.c"). psu_init_gpl.h, if + needed, should be in the same directory. U-Boot will build + and link the user-provided file instead of the built-in one. + + Leave empty to use the files provided by U-Boot. + + This feature requires commit + 6da4f67ad09cd8b311d77b2b04e557b7ef65b56c from upstream + U-Boot, available from versions after 2018.07. + endif config BR2_TARGET_UBOOT_ALTERA_SOCFPGA_IMAGE_CRC diff --git a/boot/uboot/uboot.mk b/boot/uboot/uboot.mk index d9c9b72e76..04c759be34 100644 --- a/boot/uboot/uboot.mk +++ b/boot/uboot/uboot.mk @@ -304,6 +304,16 @@ define UBOOT_ZYNQMP_KCONFIG_PMUFW $(@D)/.config) endef +UBOOT_ZYNQMP_PSU_INIT = $(call qstrip,$(BR2_TARGET_UBOOT_ZYNQMP_PSU_INIT_FILE)) +UBOOT_ZYNQMP_PSU_INIT_PATH = $(shell readlink -f $(UBOOT_ZYNQMP_PSU_INIT)) + +ifneq ($(UBOOT_ZYNQMP_PSU_INIT),) +define UBOOT_ZYNQMP_KCONFIG_PSU_INIT + $(call KCONFIG_SET_OPT,CONFIG_XILINX_PS_INIT_FILE,"$(UBOOT_ZYNQMP_PSU_INIT_PATH)", \ + $(@D)/.config) +endef +endif + endif # BR2_TARGET_UBOOT_ZYNQMP define UBOOT_INSTALL_OMAP_IFT_IMAGE @@ -357,6 +367,7 @@ endif define UBOOT_KCONFIG_FIXUP_CMDS $(UBOOT_ZYNQMP_KCONFIG_PMUFW) + $(UBOOT_ZYNQMP_KCONFIG_PSU_INIT) endef ifeq ($(BR2_TARGET_UBOOT_ENVIMAGE),y)