HelenOS sources

KM_PPC32_NON_IDENTITY_SIZE   48 kernel/arch/ppc32/src/mm/km.c 	    KM_PPC32_NON_IDENTITY_SIZE);
KM_PPC32_NON_IDENTITY_SIZE   54 kernel/arch/ppc32/src/mm/km.c 	    KM_PPC32_NON_IDENTITY_SIZE, addr, 1);
HelenOS homepage, sources at GitHub