ARM64: zynqmp: Add SPL support support

Support RAM and MMC boot mode in SPL also with SPL_FIT images.

In MMC boot mode two boot options are available:
1) Boot flow with ATF(EL3) and full U-Boot(EL2):
 aarch64-linux-gnu-objcopy -O binary bl31.elf bl31.bin
 mkimage -A arm64 -O linux -T kernel -C none -a 0xfffe5000 -e 0xfffe5000
 -d bl31.bin atf.ub
 cp spl/boot.bin <sdcard fat partition>
 cp atf.ub <sdcard fat partition>
 cp u-boot.bin <sdcard fat partition>

2) Boot flow with full U-Boot(EL3):
 cp spl/boot.bin <sdcard>
 cp u-boot*.img <sdcard>

3) emmc boot mode
 dd if=/dev/zero of=sd.img bs=1024 count=1024
 parted sd.img mktable msdos
 parted sd.img mkpart p fat32 0% 100%
 kpartx -a sd.img
 mkfs.vfat /dev/mapper/loop0p1
 mount /dev/mapper/loop0p1 /mnt/
 cp spl/boot.bin /mnt
 cp u-boot.img /mnt
 cp u-boot.bin /mnt
 cp atf.ub /mnt
 umount /dev/mapper/loop0p1
 kpartx -d sd.img
 cp sd.img /tftpboot/

 and program it via u-boot
 tftpb 10000 sd.img
 mmcinfo
 mmc write 10000 0 $filesize
 mmc rescan
 mmc part
 ls mmc 0

psu_init() function contains low level SoC setup generated for every HW
design by Xilinx design tools. xil_io.h is only supporting file to fix
all dependencies from tools. The same solution was used on Xilinx Zynq.

The patch also change CONFIG_SYS_INIT_SP_ADDR to the end of OCM which
stays at the same location all the time.
Bootrom expects starting address to be at 0xfffc0000 that's why this
address is SPL_TEXT_BASE.

Signed-off-by: Michal Simek <michal.simek@xilinx.com>

2 files changed, 57 insertions, 1 deletions

diff --git a/board/xilinx/zynqmp/Makefile b/board/xilinx/zynqmp/Makefile
index 2ab3f19..90f00c6 100644
--- a/board/xilinx/zynqmp/Makefile
+++ b/board/xilinx/zynqmp/Makefile
@@ -1,8 +1,29 @@
 #
-# (C) Copyright 2014 - 2015 Xilinx, Inc.
+# (C) Copyright 2014 - 2016 Xilinx, Inc.
 # Michal Simek <michal.simek@xilinx.com>
 #
 # SPDX-License-Identifier:	GPL-2.0+
 #
 
 obj-y	:= zynqmp.o
+
+hw-platform-y :=$(shell echo $(CONFIG_SYS_CONFIG_NAME))
+
+init-objs := $(if $(wildcard $(srctree)/$(src)/$(hw-platform-y)/psu_init_gpl.c),\
+	$(hw-platform-y)/psu_init_gpl.o)
+
+ifeq ($(init-objs),)
+ifneq ($(wildcard $(srctree)/$(src)/psu_init_gpl.c),)
+init-objs := psu_init_gpl.o
+$(if $(CONFIG_SPL_BUILD),\
+$(warning Put custom psu_init_gpl.c/h to board/xilinx/zynqmp/custom_hw_platform/))
+endif
+endif
+
+obj-$(CONFIG_SPL_BUILD) += $(init-objs)
+
+# Suppress "warning: function declaration isn't a prototype"
+CFLAGS_REMOVE_psu_init_gpl.o := -Wstrict-prototypes
+
+# To include xil_io.h
+CFLAGS_psu_init_gpl.o := -I$(srctree)/$(src)
diff --git a/board/xilinx/zynqmp/xil_io.h b/board/xilinx/zynqmp/xil_io.h
new file mode 100644
index 0000000..57ca4ad
--- /dev/null
+++ b/board/xilinx/zynqmp/xil_io.h
@@ -0,0 +1,35 @@
+/*
+ * SPDX-License-Identifier:    GPL-2.0+
+ */
+
+#ifndef XIL_IO_H /* prevent circular inclusions */
+#define XIL_IO_H
+
+/* FIXME remove this when vivado is fixed */
+#include <asm/io.h>
+
+#define xil_printf(...)
+
+void Xil_ICacheEnable(void)
+{}
+
+void Xil_DCacheEnable(void)
+{}
+
+void Xil_ICacheDisable(void)
+{}
+
+void Xil_DCacheDisable(void)
+{}
+
+void Xil_Out32(unsigned long addr, unsigned long val)
+{
+	writel(val, addr);
+}
+
+int Xil_In32(unsigned long addr)
+{
+	return readl(addr);
+}
+
+#endif /* XIL_IO_H */