Pci Configuration Space Access Sample Program List - NEC V850E/MA1 Application Note

5.5.4 PCI configuration space access sample program list

/////////////////////////////////////////////////////////////////////////
// PCI configuration space access sample
// Overview: Configuration space is accessed using procedure
// shown below.
// 1) Write 32-bit value indicating PCI device, function
// number, and register number to be accessed to
// PCI_CONFIG_ADD register of PCI Host Bridge Macro.
// 2) When reading configuration space register, read
// (word access) 32-bit value in PCI_CONFIG_DATA
// register of PCI Host Bridge Macro.
// When writing to configuration space register, write
// (word access) 32-bit value to PCI_CONFIG_DATA register //
// of PCI Host Bridge Macro.
//
// This procedure is combined in functions PCI_ConfigRead
// and PCI_ConfigWrite shown below.
// Function PCI_Config_BaseAddressInit uses function
// PCI_ConfigWrite to set base address register in
// configuration space.
//
/////////////////////////////////////////////////////////////////////////
//////////////////////
// Type declaration //
//////////////////////
typedef char
typedef short int
typedef int
typedef unsigned char
typedef unsigned short int
typedef unsigned int
typedef volatile unsigned char
typedef volatile unsigned short int
typedef volatile unsigned int
/////////////////////////////////////////////////////////////////
// Function name: PCI_ConfigRead
// Function: Reads 32-bit value in PCI configuration space.
// Argument: ConfigAdd: Register address of configuration space//
// Return value: Read configuration space register data
/////////////////////////////////////////////////////////////////
UWORD PCI_ConfigRead(UWORD ConfigAdd)
{
V850EME2_REGW(PHBMR_PCI_CONFIG_ADD)
return V850EME2_REGW(PHBMR_PCI_CONFIG_DATA);
}
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CHAPTER 5 APPLICATION EXAMPLES
BYTE;
HWORD;
WORD;
UBYTE;
UHWORD;
UWORD;
VUBYTE;
VUHWORD;
VUWORD;
= ConfigAdd;
Application Note U17121EJ1V1AN
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