124 lines
2.8 KiB
C
Executable file
124 lines
2.8 KiB
C
Executable file
/*
|
|
* Copyright (C) 2014 Stefan Kristiansson <stefan.kristiansson@saunalahti.fi>
|
|
*
|
|
* This file is licensed under the terms of the GNU General Public License
|
|
* version 2. This program is licensed "as is" without any warranty of any
|
|
* kind, whether express or implied.
|
|
*/
|
|
|
|
#ifndef __ASM_OPENRISC_BITOPS_ATOMIC_H
|
|
#define __ASM_OPENRISC_BITOPS_ATOMIC_H
|
|
|
|
static inline void set_bit(int nr, volatile unsigned long *addr)
|
|
{
|
|
unsigned long mask = BIT_MASK(nr);
|
|
unsigned long *p = ((unsigned long *)addr) + BIT_WORD(nr);
|
|
unsigned long tmp;
|
|
|
|
__asm__ __volatile__(
|
|
"1: l.lwa %0,0(%1) \n"
|
|
" l.or %0,%0,%2 \n"
|
|
" l.swa 0(%1),%0 \n"
|
|
" l.bnf 1b \n"
|
|
" l.nop \n"
|
|
: "=&r"(tmp)
|
|
: "r"(p), "r"(mask)
|
|
: "cc", "memory");
|
|
}
|
|
|
|
static inline void clear_bit(int nr, volatile unsigned long *addr)
|
|
{
|
|
unsigned long mask = BIT_MASK(nr);
|
|
unsigned long *p = ((unsigned long *)addr) + BIT_WORD(nr);
|
|
unsigned long tmp;
|
|
|
|
__asm__ __volatile__(
|
|
"1: l.lwa %0,0(%1) \n"
|
|
" l.and %0,%0,%2 \n"
|
|
" l.swa 0(%1),%0 \n"
|
|
" l.bnf 1b \n"
|
|
" l.nop \n"
|
|
: "=&r"(tmp)
|
|
: "r"(p), "r"(~mask)
|
|
: "cc", "memory");
|
|
}
|
|
|
|
static inline void change_bit(int nr, volatile unsigned long *addr)
|
|
{
|
|
unsigned long mask = BIT_MASK(nr);
|
|
unsigned long *p = ((unsigned long *)addr) + BIT_WORD(nr);
|
|
unsigned long tmp;
|
|
|
|
__asm__ __volatile__(
|
|
"1: l.lwa %0,0(%1) \n"
|
|
" l.xor %0,%0,%2 \n"
|
|
" l.swa 0(%1),%0 \n"
|
|
" l.bnf 1b \n"
|
|
" l.nop \n"
|
|
: "=&r"(tmp)
|
|
: "r"(p), "r"(mask)
|
|
: "cc", "memory");
|
|
}
|
|
|
|
static inline int test_and_set_bit(int nr, volatile unsigned long *addr)
|
|
{
|
|
unsigned long mask = BIT_MASK(nr);
|
|
unsigned long *p = ((unsigned long *)addr) + BIT_WORD(nr);
|
|
unsigned long old;
|
|
unsigned long tmp;
|
|
|
|
__asm__ __volatile__(
|
|
"1: l.lwa %0,0(%2) \n"
|
|
" l.or %1,%0,%3 \n"
|
|
" l.swa 0(%2),%1 \n"
|
|
" l.bnf 1b \n"
|
|
" l.nop \n"
|
|
: "=&r"(old), "=&r"(tmp)
|
|
: "r"(p), "r"(mask)
|
|
: "cc", "memory");
|
|
|
|
return (old & mask) != 0;
|
|
}
|
|
|
|
static inline int test_and_clear_bit(int nr, volatile unsigned long *addr)
|
|
{
|
|
unsigned long mask = BIT_MASK(nr);
|
|
unsigned long *p = ((unsigned long *)addr) + BIT_WORD(nr);
|
|
unsigned long old;
|
|
unsigned long tmp;
|
|
|
|
__asm__ __volatile__(
|
|
"1: l.lwa %0,0(%2) \n"
|
|
" l.and %1,%0,%3 \n"
|
|
" l.swa 0(%2),%1 \n"
|
|
" l.bnf 1b \n"
|
|
" l.nop \n"
|
|
: "=&r"(old), "=&r"(tmp)
|
|
: "r"(p), "r"(~mask)
|
|
: "cc", "memory");
|
|
|
|
return (old & mask) != 0;
|
|
}
|
|
|
|
static inline int test_and_change_bit(int nr, volatile unsigned long *addr)
|
|
{
|
|
unsigned long mask = BIT_MASK(nr);
|
|
unsigned long *p = ((unsigned long *)addr) + BIT_WORD(nr);
|
|
unsigned long old;
|
|
unsigned long tmp;
|
|
|
|
__asm__ __volatile__(
|
|
"1: l.lwa %0,0(%2) \n"
|
|
" l.xor %1,%0,%3 \n"
|
|
" l.swa 0(%2),%1 \n"
|
|
" l.bnf 1b \n"
|
|
" l.nop \n"
|
|
: "=&r"(old), "=&r"(tmp)
|
|
: "r"(p), "r"(mask)
|
|
: "cc", "memory");
|
|
|
|
return (old & mask) != 0;
|
|
}
|
|
|
|
#endif /* __ASM_OPENRISC_BITOPS_ATOMIC_H */
|