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/*
* Copyright (c) 1995-1994 The University of Utah and
* the Computer Systems Laboratory at the University of Utah (CSL).
* All rights reserved.
*
* Permission to use, copy, modify and distribute this software is hereby
* granted provided that (1) source code retains these copyright, permission,
* and disclaimer notices, and (2) redistributions including binaries
* reproduce the notices in supporting documentation, and (3) all advertising
* materials mentioning features or use of this software display the following
* acknowledgement: ``This product includes software developed by the
* Computer Systems Laboratory at the University of Utah.''
*
* THE UNIVERSITY OF UTAH AND CSL ALLOW FREE USE OF THIS SOFTWARE IN ITS "AS
* IS" CONDITION. THE UNIVERSITY OF UTAH AND CSL DISCLAIM ANY LIABILITY OF
* ANY KIND FOR ANY DAMAGES WHATSOEVER RESULTING FROM THE USE OF THIS SOFTWARE.
*
* CSL requests users of this software to return to csl-dist@cs.utah.edu any
* improvements that they make and grant CSL redistribution rights.
*
* Author: Bryan Ford, University of Utah CSL
*/
#include <mach/machine/proc_reg.h>
#include "cpu.h"
#include "vm_param.h"
void cpu_tables_load(struct cpu *cpu)
{
struct pseudo_descriptor pdesc;
/* Load the final GDT.
If paging is now on,
then this will point the processor to the GDT
at its new linear address in the kernel linear space. */
pdesc.limit = sizeof(cpu->tables.gdt)-1;
pdesc.linear_base = kvtolin(&cpu->tables.gdt);
set_gdt(&pdesc);
/* Reload all the segment registers from the new GDT. */
asm volatile("
ljmp %0,$1f
1:
" : : "i" (KERNEL_CS));
set_ds(KERNEL_DS);
set_es(KERNEL_DS);
set_fs(0);
set_gs(0);
set_ss(KERNEL_DS);
/* Load the IDT. */
pdesc.limit = sizeof(cpu[0].tables.idt)-1;
pdesc.linear_base = kvtolin(&cpu->tables.idt);
set_idt(&pdesc);
#ifdef DEFAULT_LDT
/* Load the default LDT. */
set_ldt(DEFAULT_LDT);
#endif
#ifdef DEFAULT_TSS
/* Make sure it isn't marked busy. */
cpu->tables.gdt[DEFAULT_TSS_IDX].access &= ~ACC_TSS_BUSY;
/* Load the default TSS. */
set_tr(DEFAULT_TSS);
#endif
}
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