xilinx: versal: Add new versal loadpdi command

Versal loadpdi command is used for loading secure & non-secure
pdi images.

Signed-off-by: T Karthik Reddy <t.karthik.reddy@xilinx.com>
Signed-off-by: Michal Simek <michal.simek@xilinx.com>

arch/arm/Kconfig

@@ -1962,6 +1962,7 @@ source "board/vscom/baltos/Kconfig"
 source "board/xilinx/Kconfig"
 source "board/xilinx/zynq/Kconfig"
 source "board/xilinx/zynqmp/Kconfig"
+source "board/xilinx/versal/Kconfig"
 source "board/phytium/durian/Kconfig"
 source "board/xen/xenguest_arm64/Kconfig"
 

board/xilinx/versal/Kconfig

@@ -0,0 +1,14 @@
+# Copyright (c) 2020, Xilinx, Inc.
+#
+# SPDX-License-Identifier: GPL-2.0
+
+if ARCH_VERSAL
+
+config CMD_VERSAL
+	bool "Enable Versal specific commands"
+	default y
+	depends on ZYNQMP_FIRMWARE
+	help
+	  Enable Versal specific commands.
+
+endif

board/xilinx/versal/Makefile

@@ -5,4 +5,5 @@
 #
 
 obj-y	:= board.o
+obj-$(CONFIG_CMD_VERSAL)	+= cmds.o
 obj-y	+= ../common/board.o

board/xilinx/versal/cmds.c

@@ -0,0 +1,105 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * (C) Copyright 2020 Xilinx, Inc.
+ * Michal Simek <michal.simek@xilinx.com>
+ */
+
+#include <cpu_func.h>
+#include <command.h>
+#include <common.h>
+#include <log.h>
+#include <memalign.h>
+#include <versalpl.h>
+#include <zynqmp_firmware.h>
+
+static int do_versal_load_pdi(struct cmd_tbl *cmdtp, int flag, int argc,
+			      char * const argv[])
+{
+	u32 buf_lo, buf_hi;
+	u32 ret_payload[5];
+	ulong addr, *pdi_buf;
+	size_t len;
+	int ret;
+
+	if (argc != cmdtp->maxargs) {
+		debug("pdi_load: incorrect parameters passed\n");
+		return CMD_RET_USAGE;
+	}
+
+	addr = simple_strtol(argv[2], NULL, 16);
+	if (!addr) {
+		debug("pdi_load: zero pdi_data address\n");
+		return CMD_RET_USAGE;
+	}
+
+	len = simple_strtoul(argv[3], NULL, 16);
+	if (!len) {
+		debug("pdi_load: zero size\n");
+		return CMD_RET_USAGE;
+	}
+
+	pdi_buf = (ulong *)ALIGN((ulong)addr, ARCH_DMA_MINALIGN);
+	if ((ulong)addr != (ulong)pdi_buf) {
+		memcpy((void *)pdi_buf, (void *)addr, len);
+		debug("Pdi addr:0x%lx aligned to 0x%lx\n",
+		      addr, (ulong)pdi_buf);
+	}
+
+	flush_dcache_range((ulong)pdi_buf, (ulong)pdi_buf + len);
+
+	buf_lo = lower_32_bits((ulong)pdi_buf);
+	buf_hi = upper_32_bits((ulong)pdi_buf);
+
+	ret = xilinx_pm_request(VERSAL_PM_LOAD_PDI, VERSAL_PM_PDI_TYPE, buf_lo,
+				buf_hi, 0, ret_payload);
+	if (ret)
+		printf("PDI load failed with err: 0x%08x\n", ret);
+
+	return ret;
+}
+
+static struct cmd_tbl cmd_versal_sub[] = {
+	U_BOOT_CMD_MKENT(loadpdi, 4, 1, do_versal_load_pdi, "", ""),
+};
+
+/**
+ * do_versal - Handle the "versal" command-line command
+ * @cmdtp:      Command data struct pointer
+ * @flag:       Command flag
+ * @argc:       Command-line argument count
+ * @argv:       Array of command-line arguments
+ *
+ * Processes the versal specific commands
+ *
+ * Return: return 0 on success, Error value if command fails.
+ * CMD_RET_USAGE incase of incorrect/missing parameters.
+ */
+static int do_versal(struct cmd_tbl *cmdtp, int flag, int argc,
+		     char *const argv[])
+{
+	struct cmd_tbl *c;
+	int ret = CMD_RET_USAGE;
+
+	if (argc < 2)
+		return CMD_RET_USAGE;
+
+	c = find_cmd_tbl(argv[1], &cmd_versal_sub[0],
+			 ARRAY_SIZE(cmd_versal_sub));
+	if (c)
+		ret = c->cmd(c, flag, argc, argv);
+
+	return cmd_process_error(c, ret);
+}
+
+#ifdef CONFIG_SYS_LONGHELP
+static char versal_help_text[] =
+	"loadpdi addr len - Load pdi image\n"
+	"load pdi image at ddr address 'addr' with pdi image size 'len'\n"
+;
+#endif
+
+U_BOOT_CMD(versal, 4, 1, do_versal,
+	   "versal sub-system",
+	   versal_help_text
+)
+