/* SPDX-License-Identifier: GPL-2.0-or-later */
/*
* Device driver for the SYMBIOS / LSILOGIC 53 C8XX and 53 C1010 family
* of PCI - SCSI IO processors .
*
* Copyright ( C ) 1999 - 2001 Gerard Roudier < groudier @ free . fr >
*
* This driver is derived from the Linux sym53c8xx driver .
* Copyright ( C ) 1998 - 2000 Gerard Roudier
*
* The sym53c8xx driver is derived from the ncr53c8xx driver that had been
* a port of the FreeBSD ncr driver to Linux - 1 . 2 . 13 .
*
* The original ncr driver has been written for 386 bsd and FreeBSD by
* Wolfgang Stanglmeier < wolf @ cologne . de >
* Stefan Esser < se @ mi . Uni - Koeln . de >
* Copyright ( C ) 1994 Wolfgang Stanglmeier
*
* Other major contributions :
*
* NVRAM detection and reading .
* Copyright ( C ) 1997 Richard Waltham < dormouse @ farsrobt . demon . co . uk >
*
* - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
*/
#ifndef SYM_MISC_H
#define SYM_MISC_H
/*
* A la VMS / CAM - 3 queue management .
*/
typedef struct sym_quehead {
struct sym_quehead *flink; /* Forward pointer */
struct sym_quehead *blink; /* Backward pointer */
} SYM_QUEHEAD;
#define sym_que_init(ptr) do { \
(ptr)->flink = (ptr); (ptr)->blink = (ptr); \
} while (0 )
static inline struct sym_quehead *sym_que_first(struct sym_quehead *head)
{
return (head->flink == head) ? 0 : head->flink;
}
static inline struct sym_quehead *sym_que_last(struct sym_quehead *head)
{
return (head->blink == head) ? 0 : head->blink;
}
static inline void __sym_que_add(struct sym_quehead * new ,
struct sym_quehead * blink,
struct sym_quehead * flink)
{
flink->blink = new ;
new ->flink = flink;
new ->blink = blink;
blink->flink = new ;
}
static inline void __sym_que_del(struct sym_quehead * blink,
struct sym_quehead * flink)
{
flink->blink = blink;
blink->flink = flink;
}
static inline int sym_que_empty(struct sym_quehead *head)
{
return head->flink == head;
}
static inline void sym_que_splice(struct sym_quehead *list,
struct sym_quehead *head)
{
struct sym_quehead *first = list->flink;
if (first != list) {
struct sym_quehead *last = list->blink;
struct sym_quehead *at = head->flink;
first->blink = head;
head->flink = first;
last->flink = at;
at->blink = last;
}
}
static inline void sym_que_move(struct sym_quehead *orig,
struct sym_quehead *dest)
{
struct sym_quehead *first, *last;
first = orig->flink;
if (first != orig) {
first->blink = dest;
dest->flink = first;
last = orig->blink;
last->flink = dest;
dest->blink = last;
orig->flink = orig;
orig->blink = orig;
} else {
dest->flink = dest;
dest->blink = dest;
}
}
#define sym_que_entry(ptr, type, member) container_of(ptr, type, member)
#define sym_insque(new , pos) __sym_que_add(new , pos, (pos)->flink)
#define sym_remque(el) __sym_que_del((el)->blink, (el)->flink)
#define sym_insque_head(new , head) __sym_que_add(new , head, (head)->flink)
static inline struct sym_quehead *sym_remque_head(struct sym_quehead *head)
{
struct sym_quehead *elem = head->flink;
if (elem != head)
__sym_que_del(head, elem->flink);
else
elem = NULL;
return elem;
}
#define sym_insque_tail(new , head) __sym_que_add(new , (head)->blink, head)
static inline struct sym_quehead *sym_remque_tail(struct sym_quehead *head)
{
struct sym_quehead *elem = head->blink;
if (elem != head)
__sym_que_del(elem->blink, head);
else
elem = 0 ;
return elem;
}
/*
* This one may be useful .
*/
#define FOR_EACH_QUEUED_ELEMENT(head, qp) \
for (qp = (head)->flink; qp != (head); qp = qp->flink)
/*
* FreeBSD does not offer our kind of queue in the CAM CCB .
* So , we have to cast .
*/
#define sym_qptr(p) ((struct sym_quehead *) (p))
/*
* Simple bitmap operations .
*/
#define sym_set_bit(p, n) (((u32 *)(p))[(n)>>5 ] |= (1 <<((n)&0 x1f)))
#define sym_clr_bit(p, n) (((u32 *)(p))[(n)>>5 ] &= ~(1 <<((n)&0 x1f)))
#define sym_is_bit(p, n) (((u32 *)(p))[(n)>>5 ] & (1 <<((n)&0 x1f)))
/*
* The below round up / down macros are to be used with a constant
* as argument ( sizeof ( . . . ) for example ) , for the compiler to
* optimize the whole thing .
* /
# define _ U_ ( a , m ) ( a ) < = ( 1 < < m ) ? m :
/*
* Round up logarithm to base 2 of a 16 bit constant .
*/
GRU16_() java.lang.StringIndexOutOfBoundsException: Index 21 out of bounds for length 21
( \
_U_(a, 0 )_U_(a, 1 )_U_(a, 2 )_U_(a, 3 )_U_(a, 4 )_U_(a, 5 )_U_(a, 6 )_U_(a, 7 ) \
_U_(a, 8 )_U_(a, 9 )_U_(a,10 )_U_(a,11 )_U_(a,12 )_U_(a,13 )_U_(a,14 )_U_(a,15 ) \
16 )
#endif /* SYM_MISC_H */
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