#define TBRL 268#define TBRU 269 /* Time base Upper/Lower (Reading) *//* * time stamp counter; _cycles since power up * Runs at fasthz/4 cycles per second (m->clkin>>3) */TEXT cycles(SB),1,$0loop: MOVW SPR(TBRU),R7 MOVW SPR(TBRL),R8 MOVW SPR(TBRU),R5 CMP R5,R7 BNE loop MOVW R7,0(R3) MOVW R8,4(R3) RETURN
#define TBRL 268
#define TBRU 269 /* Time base Upper/Lower (Reading) */
/*
* time stamp counter; _cycles since power up
* Runs at fasthz/4 cycles per second (m->clkin>>3)
*/
TEXT cycles(SB),1,$0
loop:
MOVW SPR(TBRU),R7
MOVW SPR(TBRL),R8
MOVW SPR(TBRU),R5
CMP R5,R7
BNE loop
MOVW R7,0(R3)
MOVW R8,4(R3)
RETURN