1 typedef BYTE
unsigned char;typedef int item_n
;typedef int perm_set
;struct
2 PENT
{caddr_t v_addr
;};typedef struct PENT prec
;typedef struct PENT
*
3 prec_t
;prec_t mem_hash
;BYTE
*mem_base
;struct PTE
{BYTE
*p_page
;perm_set
4 p_perms
;};typedef struct PTE pte
;struct PTP
{union{struct*PTP
5 p_tablep
;struct*PTE p_entry
;}u
;int valid
;};typedef struct PTP
6 (u
.p_tablep
);int pfree
=0;int pcount
=0;void mmu_walk_find(va
)caddr_t va
;{
7 BYTE
*page_addr
;if(mmu_base
[Level1(va
)]->valid
==0x0){l1_base
=
8 mmu_base
[Level1(va
)]->(u
.p_tablep
)=p_alloc();mmu_base
[Level1(va
)]->valid
=
9 0x3;for(idx
=0;idx
<LEVEL1_ENTRIES
;idx
++)l1_base
[idx
]->valid
=0x0;goto
10 build_level2
;}else l1_base
=mmu_base
[Level1(va
)]->(u
.p_tablep
);if
11 (l1_base
[Level2(va
)]->valid
==0x0){build_level2
:l2_base
=
12 l1_base
[Level2(va
)]->(u
.p_tablep
)=p_alloc();l1_base
[Level2(va
)]->valid
=
13 0x3;for(idx
=0;idx
<LEVEL2_ENTRIES
;idx
++)l2_base
[idx
]->valid
=0x0;goto
14 build_page
;}else l2_base
=mmu_base
[Level2(va
)]->(u
.p_tablep
);
15 page_addr
=l2_base
[Level2(va
)]->valid
;}void*a_translate(va_op
,v_addr
)int
16 va_op
;caddr_t v_addr
;{register prec_t bucket
;register caddr_t p_addr
;
17 bucket
=mem_hash
+((((v_addr
)>>ITEMBITS
))&hash_mask
);do{if
18 (bucket
->v_addr
==((v_addr
)>>ITEMBITS
){if(!(bucket
->perm_set
&va_op
))
19 goto prot_fault
;return mem_base
+v_addr
;}}while((bucket
++)->v_addr
!=
20 ((caddr_t
)0));page_miss
:p_addr
=(--bucket
)->p_addr
;page_type
:switch
21 (p_addr
){case BUCKET_FULL
:enlarge_hash_table(mem_hash
);case((caddr_t
)0):
22 p_addr
=fill_item_entry(va_op
,v_addr
);goto page_type
;case((caddr_t
)1):
23 default:((void)(((0))?0:(__eprintf("Failed assertion`%s'at line%d
24 of`%s'.\n","FALSE",327,"b.c"),0)));}}void flush_hash(hasht
,
25 hash_size
)prec_t hasht
;int hash_size
;{register prec_t bucket
;register int
26 idx
;bucket
=hasht
;for(idx
=(hash_size
*3)-1;idx
>=0;idx
--){
27 bucket
->v_addr
=((caddr_t
)0);bucket
->p_addr
=((caddr_t
)0);
28 bucket
->perm_set
=VA_EMPTY
;}}void init_mem(){mem_base
=(BYTE
*)calloc(1024
29 ,(1<<13));((void)((mem_base
!=(BYTE
*)0)?0:(__eprintf("Failed
30 assertion`%s'at line%d of`%s'.\n","mem_base!=(BYTE*)0",366,"b.c"),
31 0)));hash_num
=INIT_NUM_ENTRIES
*3;mem_hash
=(prec_t
)calloc(hash_num
,
32 sizeof(prec
));((void)((mem_hash
!=(prec_t
)0)?0:(__eprintf("Failed
33 assertion`%s'at line%d of`%s'.\n","mem_hash!=(prec_t)0",370,"b.c"),
34 0)));flush_hash(mem_hash
,32);build_ptables(mem_base
,1024*(1<<13));}
35 struct tm
{int tm_sec
;int tm_min
;int tm_hour
;int tm_mday
;int tm_mon
;int
36 tm_year
;int tm_wday
;int tm_yday
;int tm_isdst
;char*tm_zone
;long tm_gmtoff
;};
