| typedef BYTE unsigned char;typedef int item_n;typedef int perm_set;struct |
| PENT{caddr_t v_addr;};typedef struct PENT prec;typedef struct PENT* |
| prec_t;prec_t mem_hash;BYTE*mem_base;struct PTE{BYTE*p_page;perm_set |
| p_perms;};typedef struct PTE pte;struct PTP{union{struct*PTP |
| p_tablep;struct*PTE p_entry;}u;int valid;};typedef struct PTP |
| (u.p_tablep);int pfree=0;int pcount=0;void mmu_walk_find(va)caddr_t va;{ |
| BYTE*page_addr;if(mmu_base[Level1(va)]->valid==0x0){l1_base= |
| mmu_base[Level1(va)]->(u.p_tablep)=p_alloc();mmu_base[Level1(va)]->valid= |
| 0x3;for(idx=0;idx<LEVEL1_ENTRIES;idx++)l1_base[idx]->valid=0x0;goto |
| build_level2;}else l1_base=mmu_base[Level1(va)]->(u.p_tablep);if |
| (l1_base[Level2(va)]->valid==0x0){build_level2:l2_base= |
| l1_base[Level2(va)]->(u.p_tablep)=p_alloc();l1_base[Level2(va)]->valid= |
| 0x3;for(idx=0;idx<LEVEL2_ENTRIES;idx++)l2_base[idx]->valid=0x0;goto |
| build_page;}else l2_base=mmu_base[Level2(va)]->(u.p_tablep); |
| page_addr=l2_base[Level2(va)]->valid;}void*a_translate(va_op,v_addr)int |
| va_op;caddr_t v_addr;{register prec_t bucket;register caddr_t p_addr; |
| bucket=mem_hash+((((v_addr)>>ITEMBITS))&hash_mask);do{if |
| (bucket->v_addr==((v_addr)>>ITEMBITS){if(!(bucket->perm_set&va_op)) |
| goto prot_fault;return mem_base+v_addr;}}while((bucket++)->v_addr!= |
| ((caddr_t)0));page_miss:p_addr=(--bucket)->p_addr;page_type:switch |
| (p_addr){case BUCKET_FULL:enlarge_hash_table(mem_hash);case((caddr_t)0): |
| p_addr=fill_item_entry(va_op,v_addr);goto page_type;case((caddr_t)1): |
| default:((void)(((0))?0:(__eprintf("Failed assertion`%s'at line%d |
| of`%s'.\n","FALSE",327,"b.c"),0)));}}void flush_hash(hasht, |
| hash_size)prec_t hasht;int hash_size;{register prec_t bucket;register int |
| idx;bucket=hasht;for(idx=(hash_size*3)-1;idx>=0;idx--){ |
| bucket->v_addr=((caddr_t)0);bucket->p_addr=((caddr_t)0); |
| bucket->perm_set=VA_EMPTY;}}void init_mem(){mem_base=(BYTE*)calloc(1024 |
| ,(1<<13));((void)((mem_base!=(BYTE*)0)?0:(__eprintf("Failed |
| assertion`%s'at line%d of`%s'.\n","mem_base!=(BYTE*)0",366,"b.c"), |
| 0)));hash_num=INIT_NUM_ENTRIES*3;mem_hash=(prec_t)calloc(hash_num, |
| sizeof(prec));((void)((mem_hash!=(prec_t)0)?0:(__eprintf("Failed |
| assertion`%s'at line%d of`%s'.\n","mem_hash!=(prec_t)0",370,"b.c"), |
| 0)));flush_hash(mem_hash,32);build_ptables(mem_base,1024*(1<<13));} |
| struct tm{int tm_sec;int tm_min;int tm_hour;int tm_mday;int tm_mon;int |
| tm_year;int tm_wday;int tm_yday;int tm_isdst;char*tm_zone;long tm_gmtoff;}; |
