1 files changed, 121 insertions, 0 deletions
diff --git a/plat/nxp/common/warm_reset/plat_warm_reset.c b/plat/nxp/common/warm_reset/plat_warm_reset.c
new file mode 100644
index 0000000..966a73c
--- /dev/null
+++ b/plat/nxp/common/warm_reset/plat_warm_reset.c
@@ -0,0 +1,121 @@
+/*
+ * Copyright 2021 NXP
+ *
+ * SPDX-License-Identifier: BSD-3-Clause
+ *
+ */
+
+#include <errno.h>
+
+#include <common/debug.h>
+#include <ddr.h>
+#ifndef NXP_COINED_BB
+#include <flash_info.h>
+#include <fspi.h>
+#include <fspi_api.h>
+#endif
+#include <lib/mmio.h>
+#include <lib/psci/psci.h>
+#ifdef NXP_COINED_BB
+#include <snvs.h>
+#endif
+
+#include <plat_nv_storage.h>
+#include "plat_warm_rst.h"
+#include "platform_def.h"
+
+#if defined(IMAGE_BL2)
+
+uint32_t is_warm_boot(void)
+{
+	uint32_t ret = mmio_read_32(NXP_RESET_ADDR + RST_RSTRQSR1_OFFSET)
+				& ~(RSTRQSR1_SWRR);
+
+	const nv_app_data_t *nv_app_data = get_nv_data();
+
+	if (ret == 0U) {
+		INFO("Not a SW(Warm) triggered reset.\n");
+		return 0U;
+	}
+
+	ret = (nv_app_data->warm_rst_flag == WARM_BOOT_SUCCESS) ? 1 : 0;
+
+	if (ret != 0U) {
+		INFO("Warm Reset was triggered..\n");
+	} else {
+		INFO("Warm Reset was not triggered..\n");
+	}
+
+	return ret;
+}
+
+#endif
+
+#if defined(IMAGE_BL31)
+int prep_n_execute_warm_reset(void)
+{
+#ifdef NXP_COINED_BB
+#if !TRUSTED_BOARD_BOOT
+	snvs_disable_zeroize_lp_gpr();
+#endif
+#else
+	int ret;
+	uint8_t warm_reset = WARM_BOOT_SUCCESS;
+
+	ret = fspi_init(NXP_FLEXSPI_ADDR, NXP_FLEXSPI_FLASH_ADDR);
+
+	if (ret != 0) {
+		ERROR("Failed to initialized driver flexspi-nor.\n");
+		ERROR("exiting warm-reset request.\n");
+		return PSCI_E_INTERN_FAIL;
+	}
+
+	/* Sector starting from NV_STORAGE_BASE_ADDR is already
+	 * erased for writing.
+	 */
+
+#if (ERLY_WRM_RST_FLG_FLSH_UPDT)
+	ret = xspi_write((uint32_t)NV_STORAGE_BASE_ADDR,
+			 &warm_reset,
+			 sizeof(warm_reset));
+#else
+	/* Preparation for writing the Warm reset flag. */
+	ret = xspi_wren((uint32_t)NV_STORAGE_BASE_ADDR);
+
+	/* IP Control Register0 - SF Address to be read */
+	fspi_out32((NXP_FLEXSPI_ADDR + FSPI_IPCR0),
+		   (uint32_t) NV_STORAGE_BASE_ADDR);
+
+	while ((fspi_in32(NXP_FLEXSPI_ADDR + FSPI_INTR) &
+		FSPI_INTR_IPTXWE_MASK) == 0) {
+		;
+	}
+	/* Write TX FIFO Data Register */
+	fspi_out32(NXP_FLEXSPI_ADDR + FSPI_TFDR, (uint32_t) warm_reset);
+
+	fspi_out32(NXP_FLEXSPI_ADDR + FSPI_INTR, FSPI_INTR_IPTXWE);
+
+	/* IP Control Register1 - SEQID_WRITE operation, Size = 1 Byte */
+	fspi_out32(NXP_FLEXSPI_ADDR + FSPI_IPCR1,
+		   (uint32_t)(FSPI_WRITE_SEQ_ID << FSPI_IPCR1_ISEQID_SHIFT) |
+		   (uint16_t) sizeof(warm_reset));
+
+	/* Trigger XSPI-IP-Write cmd only if:
+	 *  - Putting DDR in-self refresh mode is successfully.
+	 *    to complete the writing of the warm-reset flag
+	 *    to flash.
+	 *
+	 * This code is as part of assembly.
+	 */
+#endif
+#endif
+	INFO("Doing DDR Self refresh.\n");
+	_soc_sys_warm_reset();
+
+	/* Expected behaviour is to do the power cycle */
+	while (1 != 0)
+		;
+
+	return -1;
+}
+#endif