powerpc_start_pmc
pcd->pcd_start_pmc = powerpc_start_pmc;
pcd->pcd_start_pmc = powerpc_start_pmc;
pcd->pcd_start_pmc = powerpc_start_pmc;
int powerpc_start_pmc(int cpu, int ri, struct pmc *pm);
pcd->pcd_start_pmc = powerpc_start_pmc;