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TMS320F2812 headerfile setup

Hi, 

    how and where the register address have been declared ???  i had installed the header file setup and followed finally got the doubt is where the register address declared .. and also give some explain about the following 

#ifdef __cplusplus
#pragma DATA_SECTION("GpioDataRegsFile")
#else
#pragma DATA_SECTION(GpioDataRegs,"GpioDataRegsFile");
#endif
volatile struct GPIO_DATA_REGS GpioDataRegs;

what is this #pragma doing ???????????

what is that "GpioDataRegsFile" ?????

Many Thanks, 

Thiyagarajan.S