1 /******************************************************************************
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31 ******************************************************************************/
32 /*****************************************************************************/
37 * Contains I/O functions for memory-mapped or non-memory-mapped I/O
38 * architectures. These functions encapsulate Cortex A53 architecture-specific
43 * This file contains architecture-dependent code.
46 * MODIFICATION HISTORY:
48 * Ver Who Date Changes
49 * ----- -------- -------- -----------------------------------------------
50 * 5.00 pkp 05/29/14 First release
52 ******************************************************************************/
55 /***************************** Include Files *********************************/
57 #include "xil_types.h"
58 #include "xil_assert.h"
60 /*****************************************************************************/
63 * Perform a 16-bit endian converion.
65 * @param Data contains the value to be converted.
67 * @return converted value.
71 ******************************************************************************/
72 u16 Xil_EndianSwap16(u16 Data)
74 return (u16) (((Data & 0xFF00U) >> 8U) | ((Data & 0x00FFU) << 8U));
77 /*****************************************************************************/
80 * Perform a 32-bit endian converion.
82 * @param Data contains the value to be converted.
84 * @return converted value.
88 ******************************************************************************/
89 u32 Xil_EndianSwap32(u32 Data)
94 /* get each of the half words from the 32 bit word */
96 LoWord = (u16) (Data & 0x0000FFFFU);
97 HiWord = (u16) ((Data & 0xFFFF0000U) >> 16U);
99 /* byte swap each of the 16 bit half words */
101 LoWord = (((LoWord & 0xFF00U) >> 8U) | ((LoWord & 0x00FFU) << 8U));
102 HiWord = (((HiWord & 0xFF00U) >> 8U) | ((HiWord & 0x00FFU) << 8U));
104 /* swap the half words before returning the value */
106 return ((((u32)LoWord) << (u32)16U) | (u32)HiWord);