1*3801c5d3SDavid du Colombier#define TBRL 268 2*3801c5d3SDavid du Colombier#define TBRU 269 /* Time base Upper/Lower (Reading) */ 3*3801c5d3SDavid du Colombier 4*3801c5d3SDavid du Colombier/* 5*3801c5d3SDavid du Colombier * time stamp counter; _cycles since power up 6*3801c5d3SDavid du Colombier * Runs at fasthz/4 cycles per second (m->clkin>>3) 7*3801c5d3SDavid du Colombier */ 8*3801c5d3SDavid du ColombierTEXT _cycles(SB),1,$0 9*3801c5d3SDavid du Colombierloop: 10*3801c5d3SDavid du Colombier MOVW SPR(TBRU),R7 11*3801c5d3SDavid du Colombier MOVW SPR(TBRL),R8 12*3801c5d3SDavid du Colombier MOVW SPR(TBRU),R5 13*3801c5d3SDavid du Colombier CMP R5,R7 14*3801c5d3SDavid du Colombier BNE loop 15*3801c5d3SDavid du Colombier MOVW R7,0(R3) 16*3801c5d3SDavid du Colombier MOVW R8,4(R3) 17*3801c5d3SDavid du Colombier RETURN 18