aboutsummaryrefslogtreecommitdiff
path: root/include/asm-parisc/bitops.h
diff options
context:
space:
mode:
Diffstat (limited to 'include/asm-parisc/bitops.h')
-rw-r--r--include/asm-parisc/bitops.h239
1 files changed, 0 insertions, 239 deletions
diff --git a/include/asm-parisc/bitops.h b/include/asm-parisc/bitops.h
deleted file mode 100644
index 7a6ea10bd23..00000000000
--- a/include/asm-parisc/bitops.h
+++ /dev/null
@@ -1,239 +0,0 @@
-#ifndef _PARISC_BITOPS_H
-#define _PARISC_BITOPS_H
-
-#ifndef _LINUX_BITOPS_H
-#error only <linux/bitops.h> can be included directly
-#endif
-
-#include <linux/compiler.h>
-#include <asm/types.h> /* for BITS_PER_LONG/SHIFT_PER_LONG */
-#include <asm/byteorder.h>
-#include <asm/atomic.h>
-
-/*
- * HP-PARISC specific bit operations
- * for a detailed description of the functions please refer
- * to include/asm-i386/bitops.h or kerneldoc
- */
-
-#define CHOP_SHIFTCOUNT(x) (((unsigned long) (x)) & (BITS_PER_LONG - 1))
-
-
-#define smp_mb__before_clear_bit() smp_mb()
-#define smp_mb__after_clear_bit() smp_mb()
-
-/* See http://marc.theaimsgroup.com/?t=108826637900003 for discussion
- * on use of volatile and __*_bit() (set/clear/change):
- * *_bit() want use of volatile.
- * __*_bit() are "relaxed" and don't use spinlock or volatile.
- */
-
-static __inline__ void set_bit(int nr, volatile unsigned long * addr)
-{
- unsigned long mask = 1UL << CHOP_SHIFTCOUNT(nr);
- unsigned long flags;
-
- addr += (nr >> SHIFT_PER_LONG);
- _atomic_spin_lock_irqsave(addr, flags);
- *addr |= mask;
- _atomic_spin_unlock_irqrestore(addr, flags);
-}
-
-static __inline__ void clear_bit(int nr, volatile unsigned long * addr)
-{
- unsigned long mask = ~(1UL << CHOP_SHIFTCOUNT(nr));
- unsigned long flags;
-
- addr += (nr >> SHIFT_PER_LONG);
- _atomic_spin_lock_irqsave(addr, flags);
- *addr &= mask;
- _atomic_spin_unlock_irqrestore(addr, flags);
-}
-
-static __inline__ void change_bit(int nr, volatile unsigned long * addr)
-{
- unsigned long mask = 1UL << CHOP_SHIFTCOUNT(nr);
- unsigned long flags;
-
- addr += (nr >> SHIFT_PER_LONG);
- _atomic_spin_lock_irqsave(addr, flags);
- *addr ^= mask;
- _atomic_spin_unlock_irqrestore(addr, flags);
-}
-
-static __inline__ int test_and_set_bit(int nr, volatile unsigned long * addr)
-{
- unsigned long mask = 1UL << CHOP_SHIFTCOUNT(nr);
- unsigned long old;
- unsigned long flags;
- int set;
-
- addr += (nr >> SHIFT_PER_LONG);
- _atomic_spin_lock_irqsave(addr, flags);
- old = *addr;
- set = (old & mask) ? 1 : 0;
- if (!set)
- *addr = old | mask;
- _atomic_spin_unlock_irqrestore(addr, flags);
-
- return set;
-}
-
-static __inline__ int test_and_clear_bit(int nr, volatile unsigned long * addr)
-{
- unsigned long mask = 1UL << CHOP_SHIFTCOUNT(nr);
- unsigned long old;
- unsigned long flags;
- int set;
-
- addr += (nr >> SHIFT_PER_LONG);
- _atomic_spin_lock_irqsave(addr, flags);
- old = *addr;
- set = (old & mask) ? 1 : 0;
- if (set)
- *addr = old & ~mask;
- _atomic_spin_unlock_irqrestore(addr, flags);
-
- return set;
-}
-
-static __inline__ int test_and_change_bit(int nr, volatile unsigned long * addr)
-{
- unsigned long mask = 1UL << CHOP_SHIFTCOUNT(nr);
- unsigned long oldbit;
- unsigned long flags;
-
- addr += (nr >> SHIFT_PER_LONG);
- _atomic_spin_lock_irqsave(addr, flags);
- oldbit = *addr;
- *addr = oldbit ^ mask;
- _atomic_spin_unlock_irqrestore(addr, flags);
-
- return (oldbit & mask) ? 1 : 0;
-}
-
-#include <asm-generic/bitops/non-atomic.h>
-
-#ifdef __KERNEL__
-
-/**
- * __ffs - find first bit in word. returns 0 to "BITS_PER_LONG-1".
- * @word: The word to search
- *
- * __ffs() return is undefined if no bit is set.
- *
- * 32-bit fast __ffs by LaMont Jones "lamont At hp com".
- * 64-bit enhancement by Grant Grundler "grundler At parisc-linux org".
- * (with help from willy/jejb to get the semantics right)
- *
- * This algorithm avoids branches by making use of nullification.
- * One side effect of "extr" instructions is it sets PSW[N] bit.
- * How PSW[N] (nullify next insn) gets set is determined by the
- * "condition" field (eg "<>" or "TR" below) in the extr* insn.
- * Only the 1st and one of either the 2cd or 3rd insn will get executed.
- * Each set of 3 insn will get executed in 2 cycles on PA8x00 vs 16 or so
- * cycles for each mispredicted branch.
- */
-
-static __inline__ unsigned long __ffs(unsigned long x)
-{
- unsigned long ret;
-
- __asm__(
-#ifdef CONFIG_64BIT
- " ldi 63,%1\n"
- " extrd,u,*<> %0,63,32,%%r0\n"
- " extrd,u,*TR %0,31,32,%0\n" /* move top 32-bits down */
- " addi -32,%1,%1\n"
-#else
- " ldi 31,%1\n"
-#endif
- " extru,<> %0,31,16,%%r0\n"
- " extru,TR %0,15,16,%0\n" /* xxxx0000 -> 0000xxxx */
- " addi -16,%1,%1\n"
- " extru,<> %0,31,8,%%r0\n"
- " extru,TR %0,23,8,%0\n" /* 0000xx00 -> 000000xx */
- " addi -8,%1,%1\n"
- " extru,<> %0,31,4,%%r0\n"
- " extru,TR %0,27,4,%0\n" /* 000000x0 -> 0000000x */
- " addi -4,%1,%1\n"
- " extru,<> %0,31,2,%%r0\n"
- " extru,TR %0,29,2,%0\n" /* 0000000y, 1100b -> 0011b */
- " addi -2,%1,%1\n"
- " extru,= %0,31,1,%%r0\n" /* check last bit */
- " addi -1,%1,%1\n"
- : "+r" (x), "=r" (ret) );
- return ret;
-}
-
-#include <asm-generic/bitops/ffz.h>
-
-/*
- * ffs: find first bit set. returns 1 to BITS_PER_LONG or 0 (if none set)
- * This is defined the same way as the libc and compiler builtin
- * ffs routines, therefore differs in spirit from the above ffz (man ffs).
- */
-static __inline__ int ffs(int x)
-{
- return x ? (__ffs((unsigned long)x) + 1) : 0;
-}
-
-/*
- * fls: find last (most significant) bit set.
- * fls(0) = 0, fls(1) = 1, fls(0x80000000) = 32.
- */
-
-static __inline__ int fls(int x)
-{
- int ret;
- if (!x)
- return 0;
-
- __asm__(
- " ldi 1,%1\n"
- " extru,<> %0,15,16,%%r0\n"
- " zdep,TR %0,15,16,%0\n" /* xxxx0000 */
- " addi 16,%1,%1\n"
- " extru,<> %0,7,8,%%r0\n"
- " zdep,TR %0,23,24,%0\n" /* xx000000 */
- " addi 8,%1,%1\n"
- " extru,<> %0,3,4,%%r0\n"
- " zdep,TR %0,27,28,%0\n" /* x0000000 */
- " addi 4,%1,%1\n"
- " extru,<> %0,1,2,%%r0\n"
- " zdep,TR %0,29,30,%0\n" /* y0000000 (y&3 = 0) */
- " addi 2,%1,%1\n"
- " extru,= %0,0,1,%%r0\n"
- " addi 1,%1,%1\n" /* if y & 8, add 1 */
- : "+r" (x), "=r" (ret) );
-
- return ret;
-}
-
-#include <asm-generic/bitops/__fls.h>
-#include <asm-generic/bitops/fls64.h>
-#include <asm-generic/bitops/hweight.h>
-#include <asm-generic/bitops/lock.h>
-#include <asm-generic/bitops/sched.h>
-
-#endif /* __KERNEL__ */
-
-#include <asm-generic/bitops/find.h>
-
-#ifdef __KERNEL__
-
-#include <asm-generic/bitops/ext2-non-atomic.h>
-
-/* '3' is bits per byte */
-#define LE_BYTE_ADDR ((sizeof(unsigned long) - 1) << 3)
-
-#define ext2_set_bit_atomic(l,nr,addr) \
- test_and_set_bit((nr) ^ LE_BYTE_ADDR, (unsigned long *)addr)
-#define ext2_clear_bit_atomic(l,nr,addr) \
- test_and_clear_bit( (nr) ^ LE_BYTE_ADDR, (unsigned long *)addr)
-
-#endif /* __KERNEL__ */
-
-#include <asm-generic/bitops/minix-le.h>
-
-#endif /* _PARISC_BITOPS_H */