68 lines
1.3 KiB
C
68 lines
1.3 KiB
C
/**
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* \file cls.c
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* License details are found in the file LICENSE.
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* \brief
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* Initialization of cpu local variable
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* \author Taku Shimosawa <shimosawa@is.s.u-tokyo.ac.jp> \par
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* Copyright (C) 2011 - 2012 Taku Shimosawa
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*/
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/*
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* HISTORY:
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*/
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#include <kmsg.h>
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#include <string.h>
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#include <ihk/cpu.h>
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#include <ihk/debug.h>
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#include <ihk/lock.h>
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#include <ihk/mm.h>
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#include <ihk/page_alloc.h>
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#include <cls.h>
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#include <page.h>
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#include <rusage_private.h>
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#include <ihk/monitor.h>
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extern int num_processors;
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struct cpu_local_var *clv;
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int cpu_local_var_initialized = 0;
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void cpu_local_var_init(void)
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{
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int z;
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int i;
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z = sizeof(struct cpu_local_var) * num_processors;
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z = (z + PAGE_SIZE - 1) >> PAGE_SHIFT;
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clv = ihk_mc_alloc_pages(z, IHK_MC_AP_CRITICAL);
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memset(clv, 0, z * PAGE_SIZE);
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for (i = 0; i < num_processors; i++) {
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clv[i].monitor = monitor->cpu + i;
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clv[i].rusage = rusage.cpu + i;
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INIT_LIST_HEAD(&clv[i].smp_func_req_list);
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clv[i].free_chunks.rb_node = NULL;
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}
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cpu_local_var_initialized = 1;
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smp_mb();
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}
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struct cpu_local_var *get_cpu_local_var(int id)
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{
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return clv + id;
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}
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void preempt_enable(void)
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{
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if (cpu_local_var_initialized)
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--cpu_local_var(no_preempt);
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}
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void preempt_disable(void)
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{
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if (cpu_local_var_initialized)
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++cpu_local_var(no_preempt);
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}
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