init gnumach copy

1 files changed, 98 insertions, 0 deletions

diff --git a/i386/i386/mp_desc.h b/i386/i386/mp_desc.h
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+++ b/i386/i386/mp_desc.h
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+/* 
+ * Mach Operating System
+ * Copyright (c) 1991,1990 Carnegie Mellon University
+ * All Rights Reserved.
+ * 
+ * Permission to use, copy, modify and distribute this software and its
+ * documentation is hereby granted, provided that both the copyright
+ * notice and this permission notice appear in all copies of the
+ * software, derivative works or modified versions, and any portions
+ * thereof, and that both notices appear in supporting documentation.
+ * 
+ * CARNEGIE MELLON ALLOWS FREE USE OF THIS SOFTWARE IN ITS "AS IS"
+ * CONDITION.  CARNEGIE MELLON DISCLAIMS ANY LIABILITY OF ANY KIND FOR
+ * ANY DAMAGES WHATSOEVER RESULTING FROM THE USE OF THIS SOFTWARE.
+ * 
+ * Carnegie Mellon requests users of this software to return to
+ * 
+ *  Software Distribution Coordinator  or  Software.Distribution@CS.CMU.EDU
+ *  School of Computer Science
+ *  Carnegie Mellon University
+ *  Pittsburgh PA 15213-3890
+ * 
+ * any improvements or extensions that they make and grant Carnegie Mellon
+ * the rights to redistribute these changes.
+ */
+
+#ifndef	_I386_MP_DESC_H_
+#define	_I386_MP_DESC_H_
+
+#include <mach/kern_return.h>
+
+#if MULTIPROCESSOR
+
+/*
+ * Multiprocessor i386/i486 systems use a separate copy of the
+ * GDT, IDT, LDT, and kernel TSS per processor.  The first three
+ * are separate to avoid lock contention: the i386 uses locked
+ * memory cycles to access the descriptor tables.  The TSS is
+ * separate since each processor needs its own kernel stack,
+ * and since using a TSS marks it busy.
+ */
+
+#include "seg.h"
+#include "tss.h"
+#include <i386at/idt.h>
+#include "gdt.h"
+#include "ldt.h"
+
+/*
+ * The descriptor tables are together in a structure
+ * allocated one per processor (except for the boot processor).
+ */
+struct mp_desc_table {
+	struct real_gate	idt[IDTSZ];	/* IDT */
+	struct real_descriptor	gdt[GDTSZ];	/* GDT */
+	struct real_descriptor	ldt[LDTSZ];	/* LDT */
+	struct task_tss		ktss;
+};
+
+/*
+ * They are pointed to by a per-processor array.
+ */
+extern struct mp_desc_table	*mp_desc_table[NCPUS];
+
+/*
+ * The kernel TSS gets its own pointer.
+ */
+extern struct task_tss		*mp_ktss[NCPUS];
+
+/*
+ * So does the GDT.
+ */
+extern struct real_descriptor	*mp_gdt[NCPUS];
+
+extern uint8_t solid_intstack[];
+
+extern int bspdone;
+
+/*
+ * Each CPU calls this routine to set up its descriptor tables.
+ */
+extern int mp_desc_init(int);
+
+
+extern void interrupt_processor(int cpu);
+
+
+#endif /* MULTIPROCESSOR */
+
+extern void start_other_cpus(void);
+
+extern kern_return_t cpu_start(int cpu);
+
+extern kern_return_t cpu_control(int cpu, const int *info, unsigned int count);
+
+extern void interrupt_stack_alloc(void);
+
+#endif	/* _I386_MP_DESC_H_ */