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- #ifndef __ASM_SH_ATOMIC_LLSC_H
- #define __ASM_SH_ATOMIC_LLSC_H
-
- /*
- * To get proper branch prediction for the main line, we must branch
- * forward to code at the end of this object's .text section, then
- * branch back to restart the operation.
- */
- static inline void atomic_add(int i, atomic_t *v)
- {
- unsigned long tmp;
-
- __asm__ __volatile__ (
- "1: movli.l @%2, %0 ! atomic_add \n"
- " add %1, %0 \n"
- " movco.l %0, @%2 \n"
- " bf 1b \n"
- : "=&z" (tmp)
- : "r" (i), "r" (&v->counter)
- : "t");
- }
-
- static inline void atomic_sub(int i, atomic_t *v)
- {
- unsigned long tmp;
-
- __asm__ __volatile__ (
- "1: movli.l @%2, %0 ! atomic_sub \n"
- " sub %1, %0 \n"
- " movco.l %0, @%2 \n"
- " bf 1b \n"
- : "=&z" (tmp)
- : "r" (i), "r" (&v->counter)
- : "t");
- }
-
- /*
- * SH-4A note:
- *
- * We basically get atomic_xxx_return() for free compared with
- * atomic_xxx(). movli.l/movco.l require r0 due to the instruction
- * encoding, so the retval is automatically set without having to
- * do any special work.
- */
- static inline int atomic_add_return(int i, atomic_t *v)
- {
- unsigned long temp;
-
- __asm__ __volatile__ (
- "1: movli.l @%2, %0 ! atomic_add_return \n"
- " add %1, %0 \n"
- " movco.l %0, @%2 \n"
- " bf 1b \n"
- " synco \n"
- : "=&z" (temp)
- : "r" (i), "r" (&v->counter)
- : "t");
-
- return temp;
- }
-
- static inline int atomic_sub_return(int i, atomic_t *v)
- {
- unsigned long temp;
-
- __asm__ __volatile__ (
- "1: movli.l @%2, %0 ! atomic_sub_return \n"
- " sub %1, %0 \n"
- " movco.l %0, @%2 \n"
- " bf 1b \n"
- " synco \n"
- : "=&z" (temp)
- : "r" (i), "r" (&v->counter)
- : "t");
-
- return temp;
- }
-
- static inline void atomic_clear_mask(unsigned int mask, atomic_t *v)
- {
- unsigned long tmp;
-
- __asm__ __volatile__ (
- "1: movli.l @%2, %0 ! atomic_clear_mask \n"
- " and %1, %0 \n"
- " movco.l %0, @%2 \n"
- " bf 1b \n"
- : "=&z" (tmp)
- : "r" (~mask), "r" (&v->counter)
- : "t");
- }
-
- static inline void atomic_set_mask(unsigned int mask, atomic_t *v)
- {
- unsigned long tmp;
-
- __asm__ __volatile__ (
- "1: movli.l @%2, %0 ! atomic_set_mask \n"
- " or %1, %0 \n"
- " movco.l %0, @%2 \n"
- " bf 1b \n"
- : "=&z" (tmp)
- : "r" (mask), "r" (&v->counter)
- : "t");
- }
-
- #endif /* __ASM_SH_ATOMIC_LLSC_H */
-