2 * SPDX-License-Identifier: BSD-3-Clause
4 * Copyright (c) 1990 The Regents of the University of California.
7 * This code is derived from software contributed to Berkeley by
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11 * modification, are permitted provided that the following conditions
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34 * from: @(#)tss.h 5.4 (Berkeley) 1/18/91
38 #ifndef _MACHINE_TSS_H_
39 #define _MACHINE_TSS_H_ 1
42 * amd64 Context Data Type
44 * The alignment is pretty messed up here due to reuse of the original 32 bit
45 * fields. It might be worth trying to set the tss on a +4 byte offset to
46 * make the 64 bit fields aligned in practice.
50 u_int64_t tss_rsp0 __packed; /* kernel stack pointer ring 0 */
51 u_int64_t tss_rsp1 __packed; /* kernel stack pointer ring 1 */
52 u_int64_t tss_rsp2 __packed; /* kernel stack pointer ring 2 */
55 u_int64_t tss_ist1 __packed; /* Interrupt stack table 1 */
56 u_int64_t tss_ist2 __packed; /* Interrupt stack table 2 */
57 u_int64_t tss_ist3 __packed; /* Interrupt stack table 3 */
58 u_int64_t tss_ist4 __packed; /* Interrupt stack table 4 */
59 u_int64_t tss_ist5 __packed; /* Interrupt stack table 5 */
60 u_int64_t tss_ist6 __packed; /* Interrupt stack table 6 */
61 u_int64_t tss_ist7 __packed; /* Interrupt stack table 7 */
65 u_int16_t tss_iobase; /* io bitmap offset */
69 extern struct amd64tss common_tss[];
72 #endif /* _MACHINE_TSS_H_ */