58 /*
59 * Private seg op routines.
60 */
61 static int segnf_dup(struct seg *seg, struct seg *newseg);
62 static int segnf_unmap(struct seg *seg, caddr_t addr, size_t len);
63 static void segnf_free(struct seg *seg);
64 static faultcode_t segnf_nomap(void);
65 static int segnf_setprot(struct seg *seg, caddr_t addr,
66 size_t len, uint_t prot);
67 static int segnf_checkprot(struct seg *seg, caddr_t addr,
68 size_t len, uint_t prot);
69 static int segnf_nop(void);
70 static int segnf_getprot(struct seg *seg, caddr_t addr,
71 size_t len, uint_t *protv);
72 static u_offset_t segnf_getoffset(struct seg *seg, caddr_t addr);
73 static int segnf_gettype(struct seg *seg, caddr_t addr);
74 static int segnf_getvp(struct seg *seg, caddr_t addr, struct vnode **vpp);
75 static void segnf_dump(struct seg *seg);
76 static int segnf_pagelock(struct seg *seg, caddr_t addr, size_t len,
77 struct page ***ppp, enum lock_type type, enum seg_rw rw);
78 static int segnf_setpagesize(struct seg *seg, caddr_t addr, size_t len,
79 uint_t szc);
80
81
82 struct seg_ops segnf_ops = {
83 .dup = segnf_dup,
84 .unmap = segnf_unmap,
85 .free = segnf_free,
86 .fault = (faultcode_t (*)(struct hat *, struct seg *, caddr_t,
87 size_t, enum fault_type, enum seg_rw))segnf_nomap,
88 .faulta = (faultcode_t (*)(struct seg *, caddr_t)) segnf_nomap,
89 .setprot = segnf_setprot,
90 .checkprot = segnf_checkprot,
91 .sync = (int (*)(struct seg *, caddr_t, size_t, int, uint_t))
92 segnf_nop,
93 .incore = (size_t (*)(struct seg *, caddr_t, size_t, char *))
94 segnf_nop,
95 .lockop = (int (*)(struct seg *, caddr_t, size_t, int, int,
96 ulong_t *, size_t))segnf_nop,
97 .getprot = segnf_getprot,
98 .getoffset = segnf_getoffset,
99 .gettype = segnf_gettype,
100 .getvp = segnf_getvp,
101 .advise = (int (*)(struct seg *, caddr_t, size_t, uint_t))
102 segnf_nop,
103 .dump = segnf_dump,
104 .pagelock = segnf_pagelock,
105 .setpagesize = segnf_setpagesize,
106 };
107
108 /*
109 * vnode and page for the page of zeros we use for the nf mappings.
110 */
111 static kmutex_t segnf_lock;
112 static struct vnode nfvp;
113 static struct page **nfpp;
114
115 #define addr_to_vcolor(addr) \
116 (shm_alignment) ? \
117 ((int)(((uintptr_t)(addr) & (shm_alignment - 1)) >> PAGESHIFT)) : 0
118
119 /*
120 * We try to limit the number of Non-fault segments created.
121 * Non fault segments are created to optimize sparc V9 code which uses
122 * the sparc nonfaulting load ASI (ASI_PRIMARY_NOFAULT).
123 *
124 * There are several reasons why creating too many non-fault segments
125 * could cause problems.
435 segnf_getvp(struct seg *seg, caddr_t addr, struct vnode **vpp)
436 {
437 ASSERT(seg->s_as && AS_LOCK_HELD(seg->s_as, &seg->s_as->a_lock));
438
439 *vpp = &nfvp;
440 return (0);
441 }
442
443 /*
444 * segnf pages are not dumped, so we just return
445 */
446 /* ARGSUSED */
447 static void
448 segnf_dump(struct seg *seg)
449 {}
450
451 /*ARGSUSED*/
452 static int
453 segnf_pagelock(struct seg *seg, caddr_t addr, size_t len,
454 struct page ***ppp, enum lock_type type, enum seg_rw rw)
455 {
456 return (ENOTSUP);
457 }
458
459 /*ARGSUSED*/
460 static int
461 segnf_setpagesize(struct seg *seg, caddr_t addr, size_t len,
462 uint_t szc)
463 {
464 return (ENOTSUP);
465 }
|
58 /*
59 * Private seg op routines.
60 */
61 static int segnf_dup(struct seg *seg, struct seg *newseg);
62 static int segnf_unmap(struct seg *seg, caddr_t addr, size_t len);
63 static void segnf_free(struct seg *seg);
64 static faultcode_t segnf_nomap(void);
65 static int segnf_setprot(struct seg *seg, caddr_t addr,
66 size_t len, uint_t prot);
67 static int segnf_checkprot(struct seg *seg, caddr_t addr,
68 size_t len, uint_t prot);
69 static int segnf_nop(void);
70 static int segnf_getprot(struct seg *seg, caddr_t addr,
71 size_t len, uint_t *protv);
72 static u_offset_t segnf_getoffset(struct seg *seg, caddr_t addr);
73 static int segnf_gettype(struct seg *seg, caddr_t addr);
74 static int segnf_getvp(struct seg *seg, caddr_t addr, struct vnode **vpp);
75 static void segnf_dump(struct seg *seg);
76 static int segnf_pagelock(struct seg *seg, caddr_t addr, size_t len,
77 struct page ***ppp, enum lock_type type, enum seg_rw rw);
78
79
80 struct seg_ops segnf_ops = {
81 .dup = segnf_dup,
82 .unmap = segnf_unmap,
83 .free = segnf_free,
84 .fault = (faultcode_t (*)(struct hat *, struct seg *, caddr_t,
85 size_t, enum fault_type, enum seg_rw))segnf_nomap,
86 .faulta = (faultcode_t (*)(struct seg *, caddr_t)) segnf_nomap,
87 .setprot = segnf_setprot,
88 .checkprot = segnf_checkprot,
89 .sync = (int (*)(struct seg *, caddr_t, size_t, int, uint_t))
90 segnf_nop,
91 .incore = (size_t (*)(struct seg *, caddr_t, size_t, char *))
92 segnf_nop,
93 .lockop = (int (*)(struct seg *, caddr_t, size_t, int, int,
94 ulong_t *, size_t))segnf_nop,
95 .getprot = segnf_getprot,
96 .getoffset = segnf_getoffset,
97 .gettype = segnf_gettype,
98 .getvp = segnf_getvp,
99 .advise = (int (*)(struct seg *, caddr_t, size_t, uint_t))
100 segnf_nop,
101 .dump = segnf_dump,
102 .pagelock = segnf_pagelock,
103 };
104
105 /*
106 * vnode and page for the page of zeros we use for the nf mappings.
107 */
108 static kmutex_t segnf_lock;
109 static struct vnode nfvp;
110 static struct page **nfpp;
111
112 #define addr_to_vcolor(addr) \
113 (shm_alignment) ? \
114 ((int)(((uintptr_t)(addr) & (shm_alignment - 1)) >> PAGESHIFT)) : 0
115
116 /*
117 * We try to limit the number of Non-fault segments created.
118 * Non fault segments are created to optimize sparc V9 code which uses
119 * the sparc nonfaulting load ASI (ASI_PRIMARY_NOFAULT).
120 *
121 * There are several reasons why creating too many non-fault segments
122 * could cause problems.
432 segnf_getvp(struct seg *seg, caddr_t addr, struct vnode **vpp)
433 {
434 ASSERT(seg->s_as && AS_LOCK_HELD(seg->s_as, &seg->s_as->a_lock));
435
436 *vpp = &nfvp;
437 return (0);
438 }
439
440 /*
441 * segnf pages are not dumped, so we just return
442 */
443 /* ARGSUSED */
444 static void
445 segnf_dump(struct seg *seg)
446 {}
447
448 /*ARGSUSED*/
449 static int
450 segnf_pagelock(struct seg *seg, caddr_t addr, size_t len,
451 struct page ***ppp, enum lock_type type, enum seg_rw rw)
452 {
453 return (ENOTSUP);
454 }
|