PROM_LOADADDR
#define KERNTEXTOFF (KERNBASE+PROM_LOADADDR)/* start of kernel text */
size += PROM_LOADADDR;
va = marks[MARK_START] - PROM_LOADADDR;
arg = (prom_version() == PROM_OLDMON) ? (void *)PROM_LOADADDR : romp;
void (*entry)(void *) = (void (*)(void *))PROM_LOADADDR;
(void)loadboot(&io, (void *)PROM_LOADADDR);
arg = (prom_version() == PROM_OLDMON) ? (void *)PROM_LOADADDR : romp;
romp = (void *)PROM_LOADADDR; /* Used in main() */