HelenOS sources

PAT_TYPE_WRITE_PROTECTED   48 kernel/arch/amd64/include/arch/mm/pat.h 	PAT_TYPE_WRITE_PROTECTED = 5,
PAT_TYPE_WRITE_PROTECTED   48 kernel/arch/ia32/include/arch/mm/pat.h 	PAT_TYPE_WRITE_PROTECTED = 5,
HelenOS homepage, sources at GitHub