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銆銆嫻庡崡杞歡寮鍙?/strong>PCI鐨勮鍐欏師鐞嗘垜灝變笉緗楀棪浜嗭紝PCI鐨剆pec涓婇潰鍐欑殑寰堟竻妤氾紝浠旂粏澶氱湅鍑犻亶灝監K浜嗐傚洜涓烘渶榪戝叕鍙告潵浜嗕竴涓柊浜猴紝瑕佺粌涔犲啓PCI鐨勫皬宸ュ叿錛岃瘯浜嗗緢涔呮病鏈夋悶鍑烘潵錛屼富瑕佹槸鐢╲c緙栬瘧鍣紝鍐欏嚭鏉ョ殑鏍規湰鏃犳硶鍦―OS涓嬭繍琛岋紝windows涓嬭繍琛岄渶瑕侀氳繃椹卞姩璁塊棶搴曞眰紜歡錛涚敤TC緙栬瘧鍣紝鍥犱負鏄?2浣嶇殑錛屾病娉曞CFC鍜孋F8涓や釜32鐨勭鍙h闂傛墍浠ワ紝鍞竴鐨勫姙娉曞氨鏄湪C璇█涓唴宓屾眹緙栫▼搴忋?/span>
銆銆鏈濂界殑鍔炴硶灝辨槸鎶婅鍐欎袱涓?2浣嶇鍙g殑鍔ㄤ綔灝佽鎴愬瓙紼嬪簭錛岃繖鏍蜂互鍚庤皟鐢ㄥ氨浼氫究鍒╄澶氥?/span>
銆銆1錛岀涓涓槸璇葷▼搴忥細
銆銆[cpp]
銆銆unsigned long ioread(short int port)
銆銆{
銆銆unsigned long valueRet;
銆銆asm mov dx, port;
銆銆asm lea bx, valueRet;
銆銆__emit__(
銆銆0x66,0x50,
銆銆0x66,0xED,
銆銆0x66,0x89,0x07,
銆銆0x66,0x58);
銆銆return valueRet;
銆銆}
銆銆2錛岀浜屼釜鏄啓紼嬪簭錛?/span>
銆銆[cpp]
銆銆void iowrite(short int port1, unsigned long value)
銆銆{
銆銆asm mov dx, port1;
銆銆asm lea bx, value;
銆銆__emit__(
銆銆0x66,0x50,
銆銆0x66,0x8B,0x07,
銆銆0x66,0xEF,
銆銆0x66,0x58);
銆銆return;
銆銆}
銆銆娉ㄦ剰榪欎袱涓瓙紼嬪簭閮界敤鍒頒簡_emit榪欎釜浼唬鐮侊紝浠栫殑鍏蜂綋鐨勭敤娉曟槸榪欐牱鐨勶細
銆銆The _emit pseudoinstruction defines one byte at the current location in the current text segment. The_emit pseudoinstruction resembles theDB directive of MASM.
銆銆涔熷氨鏄錛屽畠鐩稿綋浜巑asm涓殑DB錛屽畾涔変竴涓猙yte銆?/span>
銆銆涓嬮潰鏈変釜渚嬪瓙錛屾潵鑷狹icrosoft鐨刬nline assembler銆?/span>
銆銆The following fragment places the bytes 0x4A, 0x43, and 0x4B into the code:
銆銆[cpp]
銆銆#define randasm __asm _emit 0x4A __asm _emit 0x43 __asm _emit 0x4B
銆銆.
銆銆.
銆銆.
銆銆__asm {
銆銆randasm
銆銆}
銆銆鍏朵粬鐨勪嬌鐢ㄦ敞鎰忎簨欏癸紝浣犲彲浠ュ弬鑰冩欏典腑鐨勬弿榪幫細
銆銆http://msdn.microsoft.com/en-us/library/1b80826t.aspx
銆銆濂戒簡錛屽鏋滀綘鎶婅繖涓や釜灝忕▼搴忔悶濂戒箣鍚庯紝閭d箞璁塊棶PCI灝卞緢綆鍗曚簡銆?/span>
銆銆涓嬮潰鏄垜鍐欑殑涓孌靛皬紼嬪簭浜嬩緥錛岃鍙朾us 0錛?device 0錛?function 0涓婇潰鐨勬墍鏈?4涓瘎瀛樺櫒鐨勫唴瀹廣?/span>
銆銆[cpp]
銆銆int main()
銆銆{
銆銆void iowrite(short int port1,unsigned long value);
銆銆unsigned long int ioread(short int port);
銆銆short int Config_Add=0xcf8;
銆銆short int Config_Dat=0xcfc;
銆銆int bus=0x00,dev=0x00,fun=0x00,reg=0x00;
銆銆unsigned long dat;
銆銆for(reg=0;reg<0x40;reg++){
銆銆iowrite(Config_Add,(0x80000000 |(bus<<16) |(dev<<11) |(fun<<8) |(reg<<2)));
銆銆dat=ioread(Config_Dat);
銆銆printf("%8.8lx",dat);
銆銆printf(" ");
銆銆if((reg+1)%4==0){printf("\n");}
銆銆}
銆銆return 0;
銆銆}
銆銆unsigned long ioread(short int port)
銆銆{
銆銆unsigned long valueRet;
銆銆asm mov dx, port;
銆銆asm lea bx, valueRet;
銆銆__emit__(
銆銆0x66,0x50,
銆銆0x66,0xED,
銆銆0x66,0x89,0x07,
銆銆0x66,0x58);
銆銆return valueRet;
銆銆}
銆銆void iowrite(short int port1, unsigned long value)
銆銆{
銆銆asm mov dx, port1;
銆銆asm lea bx, value;
銆銆__emit__(
銆銆0x66,0x50,
銆銆0x66,0x8B,0x07,
銆銆0x66,0xEF,
銆銆0x66,0x58);
銆銆return;
銆銆}
銆銆榪愯鐨勭粨鏋滃拰涓嬪浘綾諱技錛屾垜鏄湪鎴戠殑windows鐜涓嬭繍琛岀殑錛屾墍浠ユ暟鎹唴瀹硅偗瀹氫笉瀵癸紝澶ц嚧鐨勭湅涓涓嬪氨ok浜嗐?/span>