2880b9ff65
git-svn-id: file:///srv/svn/repos/haiku/trunk/current@354 a95241bf-73f2-0310-859d-f6bbb57e9c96
80 lines
1.5 KiB
C
80 lines
1.5 KiB
C
#ifndef _KERNEL_CPU_H
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#define _KERNEL_CPU_H
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/**
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* @file kernel/cpu.h
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* @brief CPU Local per-CPU data structure
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*/
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#include <stage2.h>
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#include <smp.h>
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#include <timer.h>
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/**
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* @defgroup CPU CPU Structures (not architecture specific)
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* @ingroup OpenBeOS_Kernel
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* @{
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*/
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#ifdef __cplusplus
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extern "C" {
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#endif /* __cplusplus */
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/**
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* CPU local data structure
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*/
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/**
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* One structure per cpu.
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* The structure contains data that is local to the CPU,
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* helping reduce the amount of cache thrashing.
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*/
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typedef union cpu_ent {
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/** The information structure, followed by alignment bytes to make it ?? bytes */
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struct {
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/** Number of this CPU, starting from 0 */
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int cpu_num;
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/** If set this will force a reschedule when the quantum timer expires */
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int preempted;
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/** Quantum timer */
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timer quantum_timer;
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} info;
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/** Alignment bytes */
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uint32 align[16];
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} cpu_ent;
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/**
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* Defined in core/cpu.c
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*/
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extern cpu_ent cpu[MAX_BOOT_CPUS];
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/**
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* Perform pre-boot initialisation
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* @param ka The kernel_args structure
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*/
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int cpu_preboot_init(kernel_args *ka);
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/**
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* Initialise a CPU
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* @param ka The kernel_args structure
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*/
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int cpu_init(kernel_args *ka);
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/**
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* Get a pointer to the CPU's local data structure
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*/
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/**
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* This is declared as an inline function in this header
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*/
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cpu_ent *get_cpu_struct(void);
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/**
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* Inline declaration of get_cpu_struct(void)
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*/
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extern inline cpu_ent *get_cpu_struct(void) { return &cpu[smp_get_current_cpu()]; }
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#ifdef __cplusplus
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}
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#endif
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/** @} */
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#endif /* _KERNEL_CPU_H */
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