Init Commit

2026-05-27 09:56:09 +00:00
commit ee3ede1152
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+/******************************************************************************
+* Copyright (c) 2012 - 2020 Xilinx, Inc.  All rights reserved.
+* SPDX-License-Identifier: MIT
+******************************************************************************/
+
+/*****************************************************************************/
+/**
+*
+* @file nor.c
+*
+* Contains code for the NOR FLASH functionality.
+*
+* <pre>
+* MODIFICATION HISTORY:
+*
+* Ver	Who	Date		Changes
+* ----- ---- -------- -------------------------------------------------------
+* 1.00a ecm	01/10/10 Initial release
+* 2.00a mb	25/05/12 mio init removed
+* 3.00a sgd	30/01/13 Code cleanup
+*
+* </pre>
+*
+* @note
+*
+******************************************************************************/
+
+/***************************** Include Files *********************************/
+#include "fsbl.h"
+#include "nor.h"
+#include "xstatus.h"
+
+/************************** Constant Definitions *****************************/
+
+/**************************** Type Definitions *******************************/
+
+
+/***************** Macros (Inline Functions) Definitions *********************/
+
+/************************** Function Prototypes ******************************/
+
+/************************** Variable Definitions *****************************/
+
+extern u32 FlashReadBaseAddress;
+
+/******************************************************************************/
+/******************************************************************************/
+/**
+*
+* This function initializes the controller for the NOR FLASH interface.
+*
+* @param	None
+*
+* @return	None
+*
+* @note		None.
+*
+****************************************************************************/
+void InitNor(void)
+{
+
+	/*
+	 * Set up the base address for access
+	 */
+	FlashReadBaseAddress = XPS_NOR_BASEADDR;
+}
+
+/******************************************************************************/
+/**
+*
+* This function provides the NOR FLASH interface for the Simplified header
+* functionality.
+*
+* @param	SourceAddress is address in FLASH data space
+* @param	DestinationAddress is address in OCM data space
+* @param	LengthBytes is the data length to transfer in bytes
+*
+* @return
+*		- XST_SUCCESS if the write completes correctly
+*		- XST_FAILURE if the write fails to completes correctly
+*
+* @note		None.
+*
+****************************************************************************/
+u32 NorAccess(u32 SourceAddress, u32 DestinationAddress, u32 LengthBytes)
+{
+	u32 Data;
+	u32 Count;
+	u32 *SourceAddr;
+	u32 *DestAddr;
+	u32 LengthWords;
+
+	/*
+	 * check for non-word tail
+	 * add bytes to cover the end
+	 */
+	if ((LengthBytes%4) != 0){
+
+		LengthBytes += (4 - (LengthBytes & 0x00000003));
+	}
+
+	LengthWords = LengthBytes >> WORD_LENGTH_SHIFT;
+
+	SourceAddr = (u32 *)(SourceAddress + FlashReadBaseAddress);
+	DestAddr = (u32 *)(DestinationAddress);
+
+	/*
+	 * Word transfers, endianism isn't an issue
+	 */
+	for (Count=0; Count < LengthWords; Count++){
+
+		Data = Xil_In32((u32)(SourceAddr++));
+		Xil_Out32((u32)(DestAddr++), Data);
+	}
+
+	return XST_SUCCESS;
+}
+