amba_io.h

来自「嵌入式系统」· C头文件 代码 · 共 123 行

/*-----------------------------------------------------------------------------
@@
@@ Copyright (c) 1999 Sharp Corporation All rights reserved.
@@
@@ (Summary)  : The file of the functions for ARM AMBA IO
@@
@@ (Comment)  : 
@@
@@ (Author)   : Tsuneo TOMITA
@@
@@ (History)	: Date		Modifier	Comment
@@				 
@@ (RCS ID)   : 
@@
-----------------------------------------------------------------------------*/

#ifndef AMBA_IO
#define AMBA_IO

/******************************************************************************
@@
@@ [Name]		: apd_ReadReg
@@
@@ [Summary]	: The function to read data from the address on AMBA BUS
@@
@@ [Argument]	: reg_adrs : AMBA BUS address
@@
@@ [Return]		: The read data from the specific address
@@
@@ [Desc]		: Read data from the specific address on AMBA BUS
@@				  					
@@ [History]	: Date		Modifier	Comment
@@
@@ [END]
******************************************************************************/
APD_INLINE unsigned long apd_ReadReg(
volatile unsigned long *reg_adrs
)
{
	return(*reg_adrs);
}

/******************************************************************************
@@
@@ [Name]		: apd_WriteReg
@@
@@ [Summary]	: The function to write data to the address on AMBA BUS
@@				 
@@ [Argument]	: reg_adrs : AMBA BUS address
@@				  reg_data : Written data
@@
@@ [Return]		: None
@@
@@ [Desc]		: Write the specific data to the specific address on AMBA BUS
@@				  					
@@ [History]	: Date		Modifier	Comment
@@
@@ [END]
******************************************************************************/
APD_INLINE void apd_WriteReg(
volatile unsigned long *reg_adrs,
unsigned long reg_data
)
{
	*reg_adrs = reg_data;
}

/******************************************************************************
@@
@@ [Name]		: apd_ReadRegByMask
@@
@@ [Summary]	: The function to read from the address on AMBA BUS with mask 
@@				 
@@ [Argument]	: reg_adrs : AMBA BUS address
@@				  mask : Mask data
@@
@@ [Return]		: The read data from the specific address with mask
@@
@@ [Desc]		: Read data from the specific address on AMBA BUS and mask this
@@				  data with the specific mask data
@@				  					
@@ [History]	: Date		Modifier	Comment
@@
@@ [END]
******************************************************************************/
APD_INLINE unsigned long apd_ReadRegByMask(
volatile unsigned long *reg_adrs,
unsigned long mask
)
{
	return(*reg_adrs & mask);
}

/******************************************************************************
@@
@@ [Name]	: apd_WriteRegByMask
@@
@@ [Summary]	: The function to write data to the address on AMBA BUS
@@		  with mask
@@				 
@@ [Argument]	: reg_adrs : AMBA BUS address
@@		  reg_data : Written data
@@		  mask	   : Mask data
@@
@@ [Return]	: None
@@
@@ [Desc]	: Mask data of the specific address with the specific mask
@@		  data, and write the specific data to the address on AMBA BUS
@@				  					
@@ [History]	: Date		Modifier	Comment
@@
@@ [END]
******************************************************************************/
APD_INLINE void apd_WriteRegByMask(volatile unsigned long *reg_adrs,unsigned long reg_data,unsigned long mask)
{
	unsigned long r;

	r = *reg_adrs & ~mask;
	*reg_adrs = r | reg_data;
}

#endif /* APD_AMBA_IO */