2005-04-17 00:20:36 +02:00
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#ifndef _PARISC_BITOPS_H
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#define _PARISC_BITOPS_H
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2007-10-19 08:40:26 +02:00
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#ifndef _LINUX_BITOPS_H
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#error only <linux/bitops.h> can be included directly
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#endif
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2005-04-17 00:20:36 +02:00
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#include <linux/compiler.h>
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2005-10-22 04:45:22 +02:00
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#include <asm/types.h> /* for BITS_PER_LONG/SHIFT_PER_LONG */
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2005-04-17 00:20:36 +02:00
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#include <asm/byteorder.h>
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2014-03-13 19:00:36 +01:00
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#include <asm/barrier.h>
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2011-07-27 01:09:06 +02:00
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#include <linux/atomic.h>
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2005-04-17 00:20:36 +02:00
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/*
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* HP-PARISC specific bit operations
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* for a detailed description of the functions please refer
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* to include/asm-i386/bitops.h or kerneldoc
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*/
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2005-10-22 04:45:22 +02:00
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#define CHOP_SHIFTCOUNT(x) (((unsigned long) (x)) & (BITS_PER_LONG - 1))
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2005-04-17 00:20:36 +02:00
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2005-10-22 04:45:22 +02:00
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/* See http://marc.theaimsgroup.com/?t=108826637900003 for discussion
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* on use of volatile and __*_bit() (set/clear/change):
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* *_bit() want use of volatile.
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* __*_bit() are "relaxed" and don't use spinlock or volatile.
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*/
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static __inline__ void set_bit(int nr, volatile unsigned long * addr)
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2005-04-17 00:20:36 +02:00
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{
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2005-10-22 04:45:22 +02:00
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unsigned long mask = 1UL << CHOP_SHIFTCOUNT(nr);
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2005-04-17 00:20:36 +02:00
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unsigned long flags;
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addr += (nr >> SHIFT_PER_LONG);
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_atomic_spin_lock_irqsave(addr, flags);
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*addr |= mask;
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_atomic_spin_unlock_irqrestore(addr, flags);
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}
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2005-10-22 04:45:22 +02:00
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static __inline__ void clear_bit(int nr, volatile unsigned long * addr)
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2005-04-17 00:20:36 +02:00
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{
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2005-10-22 04:45:22 +02:00
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unsigned long mask = ~(1UL << CHOP_SHIFTCOUNT(nr));
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2005-04-17 00:20:36 +02:00
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unsigned long flags;
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addr += (nr >> SHIFT_PER_LONG);
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_atomic_spin_lock_irqsave(addr, flags);
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2005-10-22 04:45:22 +02:00
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*addr &= mask;
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2005-04-17 00:20:36 +02:00
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_atomic_spin_unlock_irqrestore(addr, flags);
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}
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2005-10-22 04:45:22 +02:00
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static __inline__ void change_bit(int nr, volatile unsigned long * addr)
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2005-04-17 00:20:36 +02:00
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{
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2005-10-22 04:45:22 +02:00
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unsigned long mask = 1UL << CHOP_SHIFTCOUNT(nr);
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2005-04-17 00:20:36 +02:00
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unsigned long flags;
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addr += (nr >> SHIFT_PER_LONG);
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_atomic_spin_lock_irqsave(addr, flags);
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*addr ^= mask;
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_atomic_spin_unlock_irqrestore(addr, flags);
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}
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2005-10-22 04:45:22 +02:00
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static __inline__ int test_and_set_bit(int nr, volatile unsigned long * addr)
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2005-04-17 00:20:36 +02:00
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{
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2005-10-22 04:45:22 +02:00
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unsigned long mask = 1UL << CHOP_SHIFTCOUNT(nr);
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2006-12-14 17:00:25 +01:00
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unsigned long old;
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2005-04-17 00:20:36 +02:00
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unsigned long flags;
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2006-12-14 17:00:25 +01:00
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int set;
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2005-04-17 00:20:36 +02:00
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addr += (nr >> SHIFT_PER_LONG);
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_atomic_spin_lock_irqsave(addr, flags);
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2006-12-14 17:00:25 +01:00
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old = *addr;
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set = (old & mask) ? 1 : 0;
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if (!set)
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*addr = old | mask;
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2005-04-17 00:20:36 +02:00
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_atomic_spin_unlock_irqrestore(addr, flags);
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2006-12-14 17:00:25 +01:00
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return set;
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2005-04-17 00:20:36 +02:00
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}
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2005-10-22 04:45:22 +02:00
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static __inline__ int test_and_clear_bit(int nr, volatile unsigned long * addr)
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2005-04-17 00:20:36 +02:00
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{
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2005-10-22 04:45:22 +02:00
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unsigned long mask = 1UL << CHOP_SHIFTCOUNT(nr);
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2006-12-14 17:00:25 +01:00
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unsigned long old;
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2005-04-17 00:20:36 +02:00
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unsigned long flags;
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2006-12-14 17:00:25 +01:00
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int set;
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2005-04-17 00:20:36 +02:00
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addr += (nr >> SHIFT_PER_LONG);
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_atomic_spin_lock_irqsave(addr, flags);
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2006-12-14 17:00:25 +01:00
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old = *addr;
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set = (old & mask) ? 1 : 0;
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if (set)
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*addr = old & ~mask;
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2005-04-17 00:20:36 +02:00
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_atomic_spin_unlock_irqrestore(addr, flags);
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2006-12-14 17:00:25 +01:00
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return set;
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2005-04-17 00:20:36 +02:00
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}
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2005-10-22 04:45:22 +02:00
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static __inline__ int test_and_change_bit(int nr, volatile unsigned long * addr)
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2005-04-17 00:20:36 +02:00
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{
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2005-10-22 04:45:22 +02:00
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unsigned long mask = 1UL << CHOP_SHIFTCOUNT(nr);
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unsigned long oldbit;
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2005-04-17 00:20:36 +02:00
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unsigned long flags;
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addr += (nr >> SHIFT_PER_LONG);
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_atomic_spin_lock_irqsave(addr, flags);
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2005-10-22 04:45:22 +02:00
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oldbit = *addr;
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*addr = oldbit ^ mask;
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2005-04-17 00:20:36 +02:00
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_atomic_spin_unlock_irqrestore(addr, flags);
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2005-10-22 04:45:22 +02:00
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return (oldbit & mask) ? 1 : 0;
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2005-04-17 00:20:36 +02:00
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}
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[PATCH] bitops: parisc: use generic bitops
- remove __{,test_and_}{set,clear,change}_bit() and test_bit()
- remove ffz()
- remove generic_fls64()
- remove generic_hweight{32,16,8}()
- remove generic_hweight64()
- remove sched_find_first_bit()
- remove find_{next,first}{,_zero}_bit()
- remove ext2_{set,clear,test,find_first_zero,find_next_zero}_bit()
Signed-off-by: Akinobu Mita <mita@miraclelinux.com>
Cc: Kyle McMartin <kyle@mcmartin.ca>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2006-03-26 11:39:31 +02:00
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#include <asm-generic/bitops/non-atomic.h>
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2005-04-17 00:20:36 +02:00
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#ifdef __KERNEL__
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/**
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* __ffs - find first bit in word. returns 0 to "BITS_PER_LONG-1".
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* @word: The word to search
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*
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* __ffs() return is undefined if no bit is set.
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*
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* 32-bit fast __ffs by LaMont Jones "lamont At hp com".
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* 64-bit enhancement by Grant Grundler "grundler At parisc-linux org".
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* (with help from willy/jejb to get the semantics right)
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*
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* This algorithm avoids branches by making use of nullification.
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* One side effect of "extr" instructions is it sets PSW[N] bit.
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* How PSW[N] (nullify next insn) gets set is determined by the
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* "condition" field (eg "<>" or "TR" below) in the extr* insn.
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* Only the 1st and one of either the 2cd or 3rd insn will get executed.
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* Each set of 3 insn will get executed in 2 cycles on PA8x00 vs 16 or so
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* cycles for each mispredicted branch.
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*/
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static __inline__ unsigned long __ffs(unsigned long x)
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{
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unsigned long ret;
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__asm__(
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2007-01-28 15:09:20 +01:00
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#ifdef CONFIG_64BIT
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2005-04-17 00:20:36 +02:00
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" ldi 63,%1\n"
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" extrd,u,*<> %0,63,32,%%r0\n"
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" extrd,u,*TR %0,31,32,%0\n" /* move top 32-bits down */
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" addi -32,%1,%1\n"
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#else
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" ldi 31,%1\n"
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#endif
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" extru,<> %0,31,16,%%r0\n"
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" extru,TR %0,15,16,%0\n" /* xxxx0000 -> 0000xxxx */
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" addi -16,%1,%1\n"
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" extru,<> %0,31,8,%%r0\n"
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" extru,TR %0,23,8,%0\n" /* 0000xx00 -> 000000xx */
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" addi -8,%1,%1\n"
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" extru,<> %0,31,4,%%r0\n"
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" extru,TR %0,27,4,%0\n" /* 000000x0 -> 0000000x */
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" addi -4,%1,%1\n"
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" extru,<> %0,31,2,%%r0\n"
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" extru,TR %0,29,2,%0\n" /* 0000000y, 1100b -> 0011b */
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" addi -2,%1,%1\n"
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" extru,= %0,31,1,%%r0\n" /* check last bit */
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" addi -1,%1,%1\n"
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: "+r" (x), "=r" (ret) );
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return ret;
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}
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[PATCH] bitops: parisc: use generic bitops
- remove __{,test_and_}{set,clear,change}_bit() and test_bit()
- remove ffz()
- remove generic_fls64()
- remove generic_hweight{32,16,8}()
- remove generic_hweight64()
- remove sched_find_first_bit()
- remove find_{next,first}{,_zero}_bit()
- remove ext2_{set,clear,test,find_first_zero,find_next_zero}_bit()
Signed-off-by: Akinobu Mita <mita@miraclelinux.com>
Cc: Kyle McMartin <kyle@mcmartin.ca>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2006-03-26 11:39:31 +02:00
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#include <asm-generic/bitops/ffz.h>
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2005-04-17 00:20:36 +02:00
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/*
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* ffs: find first bit set. returns 1 to BITS_PER_LONG or 0 (if none set)
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* This is defined the same way as the libc and compiler builtin
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* ffs routines, therefore differs in spirit from the above ffz (man ffs).
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*/
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static __inline__ int ffs(int x)
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{
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return x ? (__ffs((unsigned long)x) + 1) : 0;
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}
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/*
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* fls: find last (most significant) bit set.
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* fls(0) = 0, fls(1) = 1, fls(0x80000000) = 32.
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*/
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static __inline__ int fls(int x)
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{
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int ret;
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if (!x)
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return 0;
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__asm__(
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" ldi 1,%1\n"
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" extru,<> %0,15,16,%%r0\n"
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" zdep,TR %0,15,16,%0\n" /* xxxx0000 */
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" addi 16,%1,%1\n"
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" extru,<> %0,7,8,%%r0\n"
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" zdep,TR %0,23,24,%0\n" /* xx000000 */
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" addi 8,%1,%1\n"
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" extru,<> %0,3,4,%%r0\n"
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" zdep,TR %0,27,28,%0\n" /* x0000000 */
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" addi 4,%1,%1\n"
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" extru,<> %0,1,2,%%r0\n"
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" zdep,TR %0,29,30,%0\n" /* y0000000 (y&3 = 0) */
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" addi 2,%1,%1\n"
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" extru,= %0,0,1,%%r0\n"
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" addi 1,%1,%1\n" /* if y & 8, add 1 */
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: "+r" (x), "=r" (ret) );
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return ret;
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}
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2008-03-15 18:31:49 +01:00
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#include <asm-generic/bitops/__fls.h>
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[PATCH] bitops: parisc: use generic bitops
- remove __{,test_and_}{set,clear,change}_bit() and test_bit()
- remove ffz()
- remove generic_fls64()
- remove generic_hweight{32,16,8}()
- remove generic_hweight64()
- remove sched_find_first_bit()
- remove find_{next,first}{,_zero}_bit()
- remove ext2_{set,clear,test,find_first_zero,find_next_zero}_bit()
Signed-off-by: Akinobu Mita <mita@miraclelinux.com>
Cc: Kyle McMartin <kyle@mcmartin.ca>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2006-03-26 11:39:31 +02:00
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#include <asm-generic/bitops/fls64.h>
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#include <asm-generic/bitops/hweight.h>
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2007-10-18 12:06:39 +02:00
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#include <asm-generic/bitops/lock.h>
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[PATCH] bitops: parisc: use generic bitops
- remove __{,test_and_}{set,clear,change}_bit() and test_bit()
- remove ffz()
- remove generic_fls64()
- remove generic_hweight{32,16,8}()
- remove generic_hweight64()
- remove sched_find_first_bit()
- remove find_{next,first}{,_zero}_bit()
- remove ext2_{set,clear,test,find_first_zero,find_next_zero}_bit()
Signed-off-by: Akinobu Mita <mita@miraclelinux.com>
Cc: Kyle McMartin <kyle@mcmartin.ca>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2006-03-26 11:39:31 +02:00
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#include <asm-generic/bitops/sched.h>
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2005-04-17 00:20:36 +02:00
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#endif /* __KERNEL__ */
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[PATCH] bitops: parisc: use generic bitops
- remove __{,test_and_}{set,clear,change}_bit() and test_bit()
- remove ffz()
- remove generic_fls64()
- remove generic_hweight{32,16,8}()
- remove generic_hweight64()
- remove sched_find_first_bit()
- remove find_{next,first}{,_zero}_bit()
- remove ext2_{set,clear,test,find_first_zero,find_next_zero}_bit()
Signed-off-by: Akinobu Mita <mita@miraclelinux.com>
Cc: Kyle McMartin <kyle@mcmartin.ca>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2006-03-26 11:39:31 +02:00
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#include <asm-generic/bitops/find.h>
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2005-04-17 00:20:36 +02:00
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#ifdef __KERNEL__
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[PATCH] bitops: parisc: use generic bitops
- remove __{,test_and_}{set,clear,change}_bit() and test_bit()
- remove ffz()
- remove generic_fls64()
- remove generic_hweight{32,16,8}()
- remove generic_hweight64()
- remove sched_find_first_bit()
- remove find_{next,first}{,_zero}_bit()
- remove ext2_{set,clear,test,find_first_zero,find_next_zero}_bit()
Signed-off-by: Akinobu Mita <mita@miraclelinux.com>
Cc: Kyle McMartin <kyle@mcmartin.ca>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2006-03-26 11:39:31 +02:00
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bitops: introduce little-endian bitops for most architectures
Introduce little-endian bit operations to the big-endian architectures
which do not have native little-endian bit operations and the
little-endian architectures. (alpha, avr32, blackfin, cris, frv, h8300,
ia64, m32r, mips, mn10300, parisc, sh, sparc, tile, x86, xtensa)
These architectures can just include generic implementation
(asm-generic/bitops/le.h).
Signed-off-by: Akinobu Mita <akinobu.mita@gmail.com>
Cc: Richard Henderson <rth@twiddle.net>
Cc: Ivan Kokshaysky <ink@jurassic.park.msu.ru>
Cc: Mikael Starvik <starvik@axis.com>
Cc: David Howells <dhowells@redhat.com>
Cc: Yoshinori Sato <ysato@users.sourceforge.jp>
Cc: "Luck, Tony" <tony.luck@intel.com>
Cc: Ralf Baechle <ralf@linux-mips.org>
Cc: Kyle McMartin <kyle@mcmartin.ca>
Cc: Matthew Wilcox <willy@debian.org>
Cc: Grant Grundler <grundler@parisc-linux.org>
Cc: Paul Mundt <lethal@linux-sh.org>
Cc: Kazumoto Kojima <kkojima@rr.iij4u.or.jp>
Cc: Hirokazu Takata <takata@linux-m32r.org>
Cc: "David S. Miller" <davem@davemloft.net>
Cc: Chris Zankel <chris@zankel.net>
Cc: Ingo Molnar <mingo@elte.hu>
Cc: Thomas Gleixner <tglx@linutronix.de>
Acked-by: Hans-Christian Egtvedt <hans-christian.egtvedt@atmel.com>
Acked-by: "H. Peter Anvin" <hpa@zytor.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2011-03-24 00:42:02 +01:00
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#include <asm-generic/bitops/le.h>
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#include <asm-generic/bitops/ext2-atomic-setbit.h>
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#endif /* __KERNEL__ */
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#endif /* _PARISC_BITOPS_H */
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