nxp: warm reset support to retain ddr content
NXP: Added warm reset handler to handle SMC PSCI_SYSTEM_RESET2
raised from kernel (> 5.4).
As part of first cold boot, DDR training data is stored in NV storage.
As part of this SMC handling, following things are done:
- DDR is put in self-refresh mode to retain the content of DDR.
- Reset cause is saved.
- Reset is triggered.
On next boot to last warm-reset, DDR training is restored from
the NV storage.
Signed-off-by: Ashish Kumar <ashish.kumar@nxp.com>
Signed-off-by: Kuldeep Singh <kuldeep.singh@nxp.com>
Signed-off-by: Udit Agarwal <udit.agarwal@nxp.com>
Signed-off-by: Priyanka Singh <priyanka.singh@nxp.com>
Signed-off-by: Pankaj Gupta <pankaj.gupta@nxp.com>
Change-Id: I8e4fb0824887af49e959c93825e2ab0ba887fc9d
diff --git a/plat/nxp/common/warm_reset/plat_warm_rst.h b/plat/nxp/common/warm_reset/plat_warm_rst.h
new file mode 100644
index 0000000..e0c39c5
--- /dev/null
+++ b/plat/nxp/common/warm_reset/plat_warm_rst.h
@@ -0,0 +1,28 @@
+/*
+ * Copyright 2021 NXP
+ *
+ * SPDX-License-Identifier: BSD-3-Clause
+ *
+ */
+
+#ifndef PLAT_WARM_RST_H
+#define PLAT_WARM_RST_H
+
+#ifndef NXP_COINED_BB
+#define ERLY_WRM_RST_FLG_FLSH_UPDT 0
+#endif
+
+#ifndef __ASSEMBLER__
+
+#if defined(IMAGE_BL2)
+uint32_t is_warm_boot(void);
+#endif
+
+#if defined(IMAGE_BL31)
+int prep_n_execute_warm_reset(void);
+int _soc_sys_warm_reset(void);
+#endif
+
+#endif /* __ASSEMBLER__ */
+
+#endif /* PLAT_WARM_RST_H */