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Rev 2131 Rev 2307
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    asm volatile ("andq %%rsp, %0\n" : "=r" (v) : "0" (~((uint64_t)STACK_SIZE-1)));
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    asm volatile ("andq %%rsp, %0\n" : "=r" (v) : "0" (~((uint64_t)STACK_SIZE-1)));
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    return v;
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    return v;
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}
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}
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static inline void cpu_sleep(void) { __asm__ volatile ("hlt\n"); };
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static inline void cpu_sleep(void)
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{
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    asm volatile ("hlt\n");
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};
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static inline void cpu_halt(void) { __asm__ volatile ("hlt\n"); };
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static inline void cpu_halt(void)
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{
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    asm volatile ("hlt\n");
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};
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/** Byte from port
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/** Byte from port
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 *
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 *
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 * Get byte from port
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 * Get byte from port