cp15chain.h

ARM核的边界扫描(JTAG)的实现,此代码在s3c2400上测试通过

//////////////////////////////////////////////////////////////////////////////
// CP15Chain                                                                //
//////////////////////////////////////////////////////////////////////////////
class CP15Chain : public Chain
{
	public:
		union
		{
			struct
			{
				unsigned zero:1;	// 0=interpreted access mode
				unsigned instruction:32;
				unsigned zero2:7;
			} interpretedAccessMode;

			struct
			{
				unsigned one:1;		// 1=physical access mode
				unsigned value:32;
				unsigned address:6;
				unsigned read:1;
			} physicalAccessMode;
		};

		void Select() { JTAG::Command(INTEST); JTAG::Chain(CP15_CHAIN); }
};