From: Alif Zakuan Yuslaimi <alif.zakuan.yuslaimi@altera.com>
Date: Mon, 4 Aug 2025 01:24:32 +0000 (-0700)
Subject: arm: socfpga: Update Agilex SPL data save and restore implementation
X-Git-Tag: v2025.10-rc2~3^2~29
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=677147c167ecbf4ac220a099b849cc7a5a03fec4;p=pandora-u-boot.git

arm: socfpga: Update Agilex SPL data save and restore implementation

Enable backup for data section to support warm reset in Agilex SPL as
no SPL image would be reloaded in warm reset.

Signed-off-by: Alif Zakuan Yuslaimi <alif.zakuan.yuslaimi@altera.com>
Reviewed-by: Tien Fong Chee <tien.fong.chee@altera.com>
---

diff --git a/arch/arm/mach-socfpga/spl_agilex.c b/arch/arm/mach-socfpga/spl_agilex.c
index faba0433838..698e76f45b2 100644
--- a/arch/arm/mach-socfpga/spl_agilex.c
+++ b/arch/arm/mach-socfpga/spl_agilex.c
@@ -1,6 +1,7 @@
 // SPDX-License-Identifier: GPL-2.0
 /*
  * Copyright (C) 2019 Intel Corporation <www.intel.com>
+ * Copyright (C) 2025 Altera Corporation <www.altera.com>
  *
  */
 
@@ -23,11 +24,29 @@
 
 DECLARE_GLOBAL_DATA_PTR;
 
+u32 reset_flag(void)
+{
+	/* Check rstmgr.stat for warm reset status */
+	u32 status = readl(SOCFPGA_RSTMGR_ADDRESS);
+
+	/* Check whether any L4 watchdogs or SDM had triggered warm reset */
+	u32 warm_reset_mask = RSTMGR_L4WD_MPU_WARMRESET_MASK;
+
+	if (status & warm_reset_mask)
+		return 0;
+
+	return 1;
+}
+
 void board_init_f(ulong dummy)
 {
 	int ret;
 	struct udevice *dev;
 
+#if defined(CONFIG_XPL_BUILD) && defined(CONFIG_SPL_RECOVER_DATA_SECTION)
+    spl_save_restore_data();
+#endif
+
 	ret = spl_early_init();
 	if (ret)
 		hang();