HelenOS sources

OBP_BIAS          185 boot/arch/sparc64/src/main.c 	bootinfo.physmem_start += OBP_BIAS;
OBP_BIAS          186 boot/arch/sparc64/src/main.c 	bootinfo.memmap.zones[0].start += OBP_BIAS;
OBP_BIAS          187 boot/arch/sparc64/src/main.c 	bootinfo.memmap.zones[0].size -= OBP_BIAS;
OBP_BIAS          188 boot/arch/sparc64/src/main.c 	bootinfo.memmap.total -= OBP_BIAS;
HelenOS homepage, sources at GitHub