80 lines
2.2 KiB
C
80 lines
2.2 KiB
C
/* 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) __cpu_local_vars[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) __cpu_local_vars.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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/*
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* The global cpu local variables in use
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*/
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extern struct __cpu_local_vars {
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/* Process scheduling information and the kernel reentry count. */
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struct proc *proc_ptr;/* pointer to currently running process */
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struct proc *bill_ptr;/* process to bill for clock ticks */
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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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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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struct proc * ptproc;
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/* CPU private run queues */
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struct proc * run_q_head[NR_SCHED_QUEUES]; /* ptrs to ready list headers */
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struct proc * run_q_tail[NR_SCHED_QUEUES]; /* ptrs to ready list tails */
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int cpu_is_idle; /* let the others know that you are idle */
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int idle_interrupted; /* to interrupt busy-idle
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while profiling */
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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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u64_t cpu_last_tsc;
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u64_t cpu_last_idle;
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char fpu_presence; /* whether the cpu has FPU or not */
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struct proc * fpu_owner; /* who owns the FPU of the local cpu */
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} __cpu_local_vars CPULOCAL_ARRAY;
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#endif /* __ASSEMBLY__ */
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#endif /* __CPULOCALS_H__ */
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