It is accomplished ...

git-svn-id: file:///srv/svn/repos/haiku/trunk/current@10 a95241bf-73f2-0310-859d-f6bbb57e9c96
2002-07-09 12:24:59 +00:00
commit 52a3801208
2025 changed files with 472889 additions and 0 deletions
@@ -0,0 +1,79 @@
+#ifndef _KERNEL_CPU_H
+#define _KERNEL_CPU_H
+
+/**
+ * @file kernel/cpu.h
+ * @brief CPU Local per-CPU data structure
+ */
+
+#include <stage2.h>
+#include <smp.h>
+#include <timer.h>
+
+/**
+ * @defgroup CPU CPU Structures (not architecture specific)
+ * @ingroup OpenBeOS_Kernel
+ * @{
+ */
+
+#ifdef __cplusplus
+extern "C" {
+#endif /* __cplusplus */
+
+/**
+ * CPU local data structure
+ */
+/**
+ * One structure per cpu. 
+ * The structure contains data that is local to the CPU,
+ * helping reduce the amount of cache thrashing.
+ */
+typedef union cpu_ent {
+	/** The information structure, followed by alignment bytes to make it ?? bytes */
+	struct {
+		/** Number of this CPU, starting from 0 */
+		int cpu_num;
+		/** If set this will force a reschedule when the quantum timer expires */
+		int preempted;
+		/** Quantum timer */
+		struct timer_event quantum_timer;
+	} info;
+	/** Alignment bytes */
+	uint32 align[16];
+} cpu_ent;
+
+/**
+ * Defined in core/cpu.c
+ */
+extern cpu_ent cpu[MAX_BOOT_CPUS];
+
+/**
+ * Perform pre-boot initialisation
+ * @param ka The kernel_args structure
+ */
+int cpu_preboot_init(kernel_args *ka);
+/**
+ * Initialise a CPU
+ * @param ka The kernel_args structure
+ */
+int cpu_init(kernel_args *ka);
+
+/**
+ * Get a pointer to the CPU's local data structure
+ */
+/**
+ * This is declared as an inline function in this header
+ */
+cpu_ent *get_cpu_struct(void);
+
+/**
+ * Inline declaration of get_cpu_struct(void)
+ */
+extern inline cpu_ent *get_cpu_struct(void) { return &cpu[smp_get_current_cpu()]; }
+
+#ifdef __cplusplus
+}
+#endif
+/** @} */
+
+#endif /* _KERNEL_CPU_H */