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#include <arch/types.h>
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#include <arch/types.h>
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typedef struct { volatile __u32 count; } atomic_t;
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typedef struct { volatile __u32 count; } atomic_t;
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/*
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 * TODO: these are just placeholders for real implementations of atomic_inc and atomic_dec.
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 * WARNING: the following functions cause the code to be preemption-unsafe !!!
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 */
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static inline void atomic_inc(atomic_t *val) {
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static inline void atomic_inc(atomic_t *val) {
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    val->count++;
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    __u32 tmp;
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    asm __volatile__ (
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        "1:\n"
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        "lwarx %0, 0, %2\n"
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        "addic %0, %0, 1\n"
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        "stwcx. %0, 0, %2\n"
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        "bne- 1b"
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        : "=&r" (tmp), "=m" (val->count)
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        : "r" (&val->count), "m" (val->count)
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        : "cc");
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}
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}
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static inline void atomic_dec(atomic_t *val) {
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static inline void atomic_dec(atomic_t *val) {
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    val->count--;
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    __u32 tmp;
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    asm __volatile__(
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        "1:\n"
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        "lwarx %0, 0, %2\n"
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        "addic %0, %0, -1\n"
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        "stwcx. %0, 0, %2\n"
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        "bne- 1b"
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        : "=&r" (tmp), "=m" (val->count)
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        : "r" (&val->count), "m" (val->count)
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        : "cc");
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}
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}
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static inline void atomic_set(atomic_t *val, __u32 i)
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static inline void atomic_set(atomic_t *val, __u32 i)
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{
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{
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    val->count = i;
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    val->count = i;