384328c6bc
mckernel/lib/include/*.h mckernel/arch/x86/elfboot/* mckernel/arch/x86/kboot/main.c mckernel/arch/x86/kernel/* mckernel/lib/page_alloc.c mckernel/lib/string.c mckernel/lib/include/ihk/* except mckernel/arch/x86/kernel/include/signal.h mckernel/arch/x86/tools/mcreboot-attached-mic.sh.in mckernel/arch/x86/kernel/include/syscall_list.h mckernel/arch/x86/kernel/syscall.c .
96 lines
1.9 KiB
C
96 lines
1.9 KiB
C
/**
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* \file local.c
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* License details are found in the file LICENSE.
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* \brief
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* Manipulate information for individual CPUs. These information
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* resides in memory.
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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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#include <cpulocal.h>
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#include <ihk/atomic.h>
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#include <ihk/mm.h>
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#include <ihk/cpu.h>
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#include <ihk/debug.h>
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#include <registers.h>
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#include <string.h>
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struct x86_cpu_local_variables *locals;
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void init_processors_local(int max_id)
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{
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/* Is contiguous allocating adequate?? */
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locals = ihk_mc_alloc_pages(max_id, IHK_MC_AP_CRITICAL);
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memset(locals, 0, PAGE_SIZE * max_id);
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kprintf("locals = %p\n", locals);
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}
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struct x86_cpu_local_variables *get_x86_cpu_local_variable(int id)
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{
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return (struct x86_cpu_local_variables *)
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((char *)locals + (id << PAGE_SHIFT));
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}
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static void *get_x86_cpu_local_kstack(int id)
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{
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return ((char *)locals + ((id + 1) << PAGE_SHIFT));
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}
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struct x86_cpu_local_variables *get_x86_this_cpu_local(void)
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{
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int id = ihk_mc_get_processor_id();
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return get_x86_cpu_local_variable(id);
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}
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void *get_x86_this_cpu_kstack(void)
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{
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int id = ihk_mc_get_processor_id();
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return get_x86_cpu_local_kstack(id);
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}
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static void set_fs_base(void *address)
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{
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wrmsr(MSR_FS_BASE, (unsigned long)address);
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}
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static void set_gs_base(void *address)
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{
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wrmsr(MSR_GS_BASE, (unsigned long)address);
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}
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static ihk_atomic_t last_processor_id = IHK_ATOMIC_INIT(-1);
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void assign_processor_id(void)
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{
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int id;
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struct x86_cpu_local_variables *v;
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id = ihk_atomic_inc_return(&last_processor_id);
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v = get_x86_cpu_local_variable(id);
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set_gs_base(v);
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v->processor_id = id;
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}
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/** IHK **/
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int ihk_mc_get_processor_id(void)
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{
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int id;
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asm volatile("movl %%gs:0, %0" : "=r"(id));
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return id;
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}
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int ihk_mc_get_hardware_processor_id(void)
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{
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struct x86_cpu_local_variables *v = get_x86_this_cpu_local();
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return v->apic_id;
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}
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