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/******************************************************************************
* Copyright (c) 2014 - 2021 Xilinx, Inc. All rights reserved.
* SPDX-License-Identifier: MIT
******************************************************************************/
/*****************************************************************************/
/**
*
* @file xil_io.h
*
* @addtogroup common_io_interfacing_apis Register IO interfacing APIs
*
* The xil_io.h file contains the interface for the general I/O component, which
* encapsulates the Input/Output functions for the processors that do not
* require any special I/O handling.
*
* @{
* <pre>
* MODIFICATION HISTORY:
*
* Ver Who Date Changes
* ----- -------- -------- -----------------------------------------------
* 5.00 pkp 05/29/14 First release
* 6.00 mus 08/19/16 Remove checking of __LITTLE_ENDIAN__ flag for
* ARM processors
* 7.20 har 01/03/20 Added Xil_SecureOut32 for avoiding blindwrite for
* CR-1049218
* 7.30 kpt 09/21/20 Moved Xil_EndianSwap16 and Xil_EndianSwap32 to
* xil_io.h and made them as static inline
* am 10/13/20 Changed the return type of Xil_SecureOut32 function
* from u32 to int
* 7.50 dp 02/12/21 Fix compilation error in Xil_EndianSwap32() that occur
* when -Werror=conversion compiler flag is enabled
* 7.5 mus 05/17/21 Update the functions with comments. It fixes CR#1067739.
*
* </pre>
******************************************************************************/
#ifndef XIL_IO_H /* prevent circular inclusions */
#define XIL_IO_H /* by using protection macros */
#ifdef __cplusplus
extern "C" {
#endif
/***************************** Include Files *********************************/
#include "xil_types.h"
#include "xil_printf.h"
#include "xstatus.h"
#if defined (__MICROBLAZE__)
#include "mb_interface.h"
#else
#include "xpseudo_asm.h"
#endif
/************************** Function Prototypes ******************************/
#ifdef ENABLE_SAFETY
extern u32 XStl_RegUpdate(u32 RegAddr, u32 RegVal);
#endif
/***************** Macros (Inline Functions) Definitions *********************/
#if defined __GNUC__
#if defined (__MICROBLAZE__)
# define INST_SYNC mbar(0)
# define DATA_SYNC mbar(1)
# else
# define SYNCHRONIZE_IO dmb()
# define INST_SYNC isb()
# define DATA_SYNC dsb()
# endif
#else
# define SYNCHRONIZE_IO
# define INST_SYNC
# define DATA_SYNC
# define INST_SYNC
# define DATA_SYNC
#endif
#if defined (__GNUC__) || defined (__ICCARM__) || defined (__MICROBLAZE__)
#define INLINE inline
#else
#define INLINE __inline
#endif
/*****************************************************************************/
/**
*
* @brief Performs an input operation for a memory location by reading
* from the specified address and returning the 8 bit Value read from
* that address.
*
* @param Addr: contains the address to perform the input operation
*
* @return The 8 bit Value read from the specified input address.
*
******************************************************************************/
static INLINE u8 Xil_In8(UINTPTR Addr)
{
return *(volatile u8 *) Addr;
}
/*****************************************************************************/
/**
*
* @brief Performs an input operation for a memory location by reading from
* the specified address and returning the 16 bit Value read from that
* address.
*
* @param Addr: contains the address to perform the input operation
*
* @return The 16 bit Value read from the specified input address.
*
******************************************************************************/
static INLINE u16 Xil_In16(UINTPTR Addr)
{
return *(volatile u16 *) Addr;
}
/*****************************************************************************/
/**
*
* @brief Performs an input operation for a memory location by
* reading from the specified address and returning the 32 bit Value
* read from that address.
*
* @param Addr: contains the address to perform the input operation
*
* @return The 32 bit Value read from the specified input address.
*
******************************************************************************/
static INLINE u32 Xil_In32(UINTPTR Addr)
{
return *(volatile u32 *) Addr;
}
/*****************************************************************************/
/**
*
* @brief Performs an input operation for a memory location by reading the
* 64 bit Value read from that address.
*
*
* @param Addr: contains the address to perform the input operation
*
* @return The 64 bit Value read from the specified input address.
*
******************************************************************************/
static INLINE u64 Xil_In64(UINTPTR Addr)
{
return *(volatile u64 *) Addr;
}
/*****************************************************************************/
/**
*
* @brief Performs an output operation for an memory location by
* writing the 8 bit Value to the the specified address.
*
* @param Addr: contains the address to perform the output operation
* @param Value: contains the 8 bit Value to be written at the specified
* address.
*
* @return None.
*
******************************************************************************/
static INLINE void Xil_Out8(UINTPTR Addr, u8 Value)
{
/* write 8 bit value to specified address */
volatile u8 *LocalAddr = (volatile u8 *)Addr;
*LocalAddr = Value;
}
/*****************************************************************************/
/**
*
* @brief Performs an output operation for a memory location by writing the
* 16 bit Value to the the specified address.
*
* @param Addr contains the address to perform the output operation
* @param Value contains the Value to be written at the specified address.
*
* @return None.
*
******************************************************************************/
static INLINE void Xil_Out16(UINTPTR Addr, u16 Value)
{
/* write 16 bit value to specified address */
volatile u16 *LocalAddr = (volatile u16 *)Addr;
*LocalAddr = Value;
}
/*****************************************************************************/
/**
*
* @brief Performs an output operation for a memory location by writing the
* 32 bit Value to the the specified address.
*
* @param Addr contains the address to perform the output operation
* @param Value contains the 32 bit Value to be written at the specified
* address.
*
* @return None.
*
******************************************************************************/
static INLINE void Xil_Out32(UINTPTR Addr, u32 Value)
{
/* write 32 bit value to specified address */
#ifndef ENABLE_SAFETY
volatile u32 *LocalAddr = (volatile u32 *)Addr;
*LocalAddr = Value;
#else
XStl_RegUpdate(Addr, Value);
#endif
}
/*****************************************************************************/
/**
*
* @brief Performs an output operation for a memory location by writing the
* 64 bit Value to the the specified address.
*
* @param Addr contains the address to perform the output operation
* @param Value contains 64 bit Value to be written at the specified address.
*
* @return None.
*
******************************************************************************/
static INLINE void Xil_Out64(UINTPTR Addr, u64 Value)
{
/* write 64 bit value to specified address */
volatile u64 *LocalAddr = (volatile u64 *)Addr;
*LocalAddr = Value;
}
/*****************************************************************************/
/**
*
* @brief Performs an output operation for a memory location by writing the
* 32 bit Value to the the specified address and then reading it
* back to verify the value written in the register.
*
* @param Addr contains the address to perform the output operation
* @param Value contains 32 bit Value to be written at the specified address
*
* @return Returns Status
* - XST_SUCCESS on success
* - XST_FAILURE on failure
*
*****************************************************************************/
static INLINE int Xil_SecureOut32(UINTPTR Addr, u32 Value)
{
int Status = XST_FAILURE;
u32 ReadReg;
u32 ReadRegTemp;
/* writing 32 bit value to specified address */
Xil_Out32(Addr, Value);
/* verify value written to specified address with multiple reads */
ReadReg = Xil_In32(Addr);
ReadRegTemp = Xil_In32(Addr);
if( (ReadReg == Value) && (ReadRegTemp == Value) ) {
Status = XST_SUCCESS;
}
return Status;
}
/*****************************************************************************/
/**
*
* @brief Perform a 16-bit endian conversion.
*
* @param Data: 16 bit value to be converted
*
* @return 16 bit Data with converted endianness
*
******************************************************************************/
static INLINE __attribute__((always_inline)) u16 Xil_EndianSwap16(u16 Data)
{
return (u16) (((Data & 0xFF00U) >> 8U) | ((Data & 0x00FFU) << 8U));
}
/*****************************************************************************/
/**
*
* @brief Perform a 32-bit endian conversion.
*
* @param Data: 32 bit value to be converted
*
* @return 32 bit data with converted endianness
*
******************************************************************************/
static INLINE __attribute__((always_inline)) u32 Xil_EndianSwap32(u32 Data)
{
u16 LoWord;
u16 HiWord;
/* get each of the half words from the 32 bit word */
LoWord = (u16) (Data & 0x0000FFFFU);
HiWord = (u16) ((Data & 0xFFFF0000U) >> 16U);
/* byte swap each of the 16 bit half words */
LoWord = (u16)(((LoWord & 0xFF00U) >> 8U) | ((LoWord & 0x00FFU) << 8U));
HiWord = (u16)(((HiWord & 0xFF00U) >> 8U) | ((HiWord & 0x00FFU) << 8U));
/* swap the half words before returning the value */
return ((((u32)LoWord) << (u32)16U) | (u32)HiWord);
}
#if defined (__MICROBLAZE__)
#ifdef __LITTLE_ENDIAN__
# define Xil_In16LE Xil_In16
# define Xil_In32LE Xil_In32
# define Xil_Out16LE Xil_Out16
# define Xil_Out32LE Xil_Out32
# define Xil_Htons Xil_EndianSwap16
# define Xil_Htonl Xil_EndianSwap32
# define Xil_Ntohs Xil_EndianSwap16
# define Xil_Ntohl Xil_EndianSwap32
# else
# define Xil_In16BE Xil_In16
# define Xil_In32BE Xil_In32
# define Xil_Out16BE Xil_Out16
# define Xil_Out32BE Xil_Out32
# define Xil_Htons(Data) (Data)
# define Xil_Htonl(Data) (Data)
# define Xil_Ntohs(Data) (Data)
# define Xil_Ntohl(Data) (Data)
#endif
#else
# define Xil_In16LE Xil_In16
# define Xil_In32LE Xil_In32
# define Xil_Out16LE Xil_Out16
# define Xil_Out32LE Xil_Out32
# define Xil_Htons Xil_EndianSwap16
# define Xil_Htonl Xil_EndianSwap32
# define Xil_Ntohs Xil_EndianSwap16
# define Xil_Ntohl Xil_EndianSwap32
#endif
#if defined (__MICROBLAZE__)
#ifdef __LITTLE_ENDIAN__
static INLINE u16 Xil_In16BE(UINTPTR Addr)
#else
static INLINE u16 Xil_In16LE(UINTPTR Addr)
#endif
#else
static INLINE u16 Xil_In16BE(UINTPTR Addr)
#endif
{
u16 value = Xil_In16(Addr);
return Xil_EndianSwap16(value);
}
#if defined (__MICROBLAZE__)
#ifdef __LITTLE_ENDIAN__
static INLINE u32 Xil_In32BE(UINTPTR Addr)
#else
static INLINE u32 Xil_In32LE(UINTPTR Addr)
#endif
#else
static INLINE u32 Xil_In32BE(UINTPTR Addr)
#endif
{
u32 value = Xil_In32(Addr);
return Xil_EndianSwap32(value);
}
#if defined (__MICROBLAZE__)
#ifdef __LITTLE_ENDIAN__
static INLINE void Xil_Out16BE(UINTPTR Addr, u16 Value)
#else
static INLINE void Xil_Out16LE(UINTPTR Addr, u16 Value)
#endif
#else
static INLINE void Xil_Out16BE(UINTPTR Addr, u16 Value)
#endif
{
Value = Xil_EndianSwap16(Value);
Xil_Out16(Addr, Value);
}
#if defined (__MICROBLAZE__)
#ifdef __LITTLE_ENDIAN__
static INLINE void Xil_Out32BE(UINTPTR Addr, u32 Value)
#else
static INLINE void Xil_Out32LE(UINTPTR Addr, u32 Value)
#endif
#else
static INLINE void Xil_Out32BE(UINTPTR Addr, u32 Value)
#endif
{
Value = Xil_EndianSwap32(Value);
Xil_Out32(Addr, Value);
}
#ifdef __cplusplus
}
#endif
#endif /* end of protection macro */
/**
* @} End of "addtogroup common_io_interfacing_apis".
*/
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