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Diffstat (limited to 'i386/util/tss.c')
| -rw-r--r-- | i386/util/tss.c | 45 |
1 files changed, 45 insertions, 0 deletions
diff --git a/i386/util/tss.c b/i386/util/tss.c new file mode 100644 index 0000000..a9be7bf --- /dev/null +++ b/i386/util/tss.c @@ -0,0 +1,45 @@ +/* + * 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/tss.h> +#include <mach/machine/proc_reg.h> + +#include "cpu.h" + +#ifdef ENABLE_KERNEL_TSS + +void +cpu_tss_init(struct cpu *cpu) +{ + /* Only initialize once. */ + if (!cpu->tables.tss.ss0) + { + /* Initialize the master TSS. */ + cpu->tables.tss.ss0 = KERNEL_DS; + cpu->tables.tss.esp0 = get_esp(); /* only temporary */ + cpu->tables.tss.io_bit_map_offset = sizeof(cpu->tables.tss); + } +} + +#endif + |