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93 lines
2.8 KiB
93 lines
2.8 KiB
/* Implementation of CPU local variables generics */
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#ifndef __CPULOCALS_H__
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#define __CPULOCALS_H__
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#ifndef __ASSEMBLY__
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#ifdef CONFIG_SMP
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/* SMP */
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#define CPULOCAL_ARRAY [CONFIG_MAX_CPUS]
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#define get_cpu_var(cpu, name) CPULOCAL_STRUCT[cpu].name
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#define get_cpu_var_ptr(cpu, name) (&(get_cpu_var(cpu, name)))
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#define get_cpulocal_var(name) get_cpu_var(cpuid, name)
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#define get_cpulocal_var_ptr(name) get_cpu_var_ptr(cpuid, name)
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/* FIXME - padd the structure so that items in the array do not share cacheline
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* with other cpus */
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#else
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/* single CPU */
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#define CPULOCAL_ARRAY
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#define get_cpulocal_var(name) CPULOCAL_STRUCT.name
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#define get_cpulocal_var_ptr(name) &(get_cpulocal_var(name))
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#define get_cpu_var(cpu, name) get_cpulocal_var(name)
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#define get_cpu_var_ptr(cpu, name) get_cpulocal_var_ptr(name)
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#endif
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#define DECLARE_CPULOCAL(type, name) type name
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#define CPULOCAL_STRUCT __cpu_local_vars
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#define ___CPULOCAL_START struct CPULOCAL_STRUCT {
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#define ___CPULOCAL_END } CPULOCAL_STRUCT CPULOCAL_ARRAY;
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#define DECLARE_CPULOCAL_START extern ___CPULOCAL_START
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#define DECLARE_CPULOCAL_END ___CPULOCAL_END
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#define DEFINE_CPULOCAL_VARS struct CPULOCAL_STRUCT CPULOCAL_STRUCT CPULOCAL_ARRAY
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/*
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* The global cpu local variables in use
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*/
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DECLARE_CPULOCAL_START
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/* Process scheduling information and the kernel reentry count. */
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DECLARE_CPULOCAL(struct proc *,proc_ptr);/* pointer to currently running process */
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DECLARE_CPULOCAL(struct proc *,bill_ptr);/* process to bill for clock ticks */
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DECLARE_CPULOCAL(struct proc ,idle_proc);/* stub for an idle process */
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/*
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* signal whether pagefault is already being handled to detect recursive
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* pagefaults
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*/
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DECLARE_CPULOCAL(int, pagefault_handled);
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/*
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* which processpage tables are loaded right now. We need to know this because
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* some processes are loaded in each process pagetables and don't have their own
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* pagetables. Therefore we cannot use the proc_ptr pointer
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*/
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DECLARE_CPULOCAL(struct proc *, ptproc);
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/* CPU private run queues */
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DECLARE_CPULOCAL(struct proc *, run_q_head[NR_SCHED_QUEUES]); /* ptrs to ready list headers */
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DECLARE_CPULOCAL(struct proc *, run_q_tail[NR_SCHED_QUEUES]); /* ptrs to ready list tails */
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DECLARE_CPULOCAL(volatile int, cpu_is_idle); /* let the others know that you are idle */
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DECLARE_CPULOCAL(volatile int, idle_interrupted); /* to interrupt busy-idle
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while profiling */
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DECLARE_CPULOCAL(u64_t ,tsc_ctr_switch); /* when did we switched time accounting */
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/* last values read from cpu when sending ooq msg to scheduler */
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DECLARE_CPULOCAL(u64_t, cpu_last_tsc);
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DECLARE_CPULOCAL(u64_t, cpu_last_idle);
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DECLARE_CPULOCAL(char ,fpu_presence); /* whether the cpu has FPU or not */
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DECLARE_CPULOCAL(struct proc * ,fpu_owner); /* who owns the FPU of the local cpu */
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DECLARE_CPULOCAL_END
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#endif /* __ASSEMBLY__ */
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#endif /* __CPULOCALS_H__ */
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