xref: /illumos-gate/usr/src/uts/common/xen/public/nmi.h (revision 55fea89dcaa64928bed4327112404dcb3e07b79f)
1 /******************************************************************************
2  * nmi.h
3  *
4  * NMI callback registration and reason codes.
5  *
6  * Permission is hereby granted, free of charge, to any person obtaining a copy
7  * of this software and associated documentation files (the "Software"), to
8  * deal in the Software without restriction, including without limitation the
9  * rights to use, copy, modify, merge, publish, distribute, sublicense, and/or
10  * sell copies of the Software, and to permit persons to whom the Software is
11  * furnished to do so, subject to the following conditions:
12  *
13  * The above copyright notice and this permission notice shall be included in
14  * all copies or substantial portions of the Software.
15  *
16  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
17  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
18  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
19  * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
20  * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
21  * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
22  * DEALINGS IN THE SOFTWARE.
23  *
24  * Copyright (c) 2005, Keir Fraser <keir@xensource.com>
25  */
26 
27 #ifndef __XEN_PUBLIC_NMI_H__
28 #define __XEN_PUBLIC_NMI_H__
29 
30 /*
31  * NMI reason codes:
32  * Currently these are x86-specific, stored in arch_shared_info.nmi_reason.
33  */
34  /* I/O-check error reported via ISA port 0x61, bit 6. */
35 #define _XEN_NMIREASON_io_error     0
36 #define XEN_NMIREASON_io_error      (1UL << _XEN_NMIREASON_io_error)
37  /* Parity error reported via ISA port 0x61, bit 7. */
38 #define _XEN_NMIREASON_parity_error 1
39 #define XEN_NMIREASON_parity_error  (1UL << _XEN_NMIREASON_parity_error)
40  /* Unknown hardware-generated NMI. */
41 #define _XEN_NMIREASON_unknown      2
42 #define XEN_NMIREASON_unknown       (1UL << _XEN_NMIREASON_unknown)
43 
44 /*
45  * long nmi_op(unsigned int cmd, void *arg)
46  * NB. All ops return zero on success, else a negative error code.
47  */
48 
49 /*
50  * Register NMI callback for this (calling) VCPU. Currently this only makes
51  * sense for domain 0, vcpu 0. All other callers will be returned EINVAL.
52  * arg == pointer to xennmi_callback structure.
53  */
54 #define XENNMI_register_callback   0
55 struct xennmi_callback {
56     unsigned long handler_address;
57     unsigned long pad;
58 };
59 typedef struct xennmi_callback xennmi_callback_t;
60 DEFINE_XEN_GUEST_HANDLE(xennmi_callback_t);
61 
62 /*
63  * Deregister NMI callback for this (calling) VCPU.
64  * arg == NULL.
65  */
66 #define XENNMI_unregister_callback 1
67 
68 #endif /* __XEN_PUBLIC_NMI_H__ */
69 
70 /*
71  * Local variables:
72  * mode: C
73  * c-set-style: "BSD"
74  * c-basic-offset: 4
75  * tab-width: 4
76  * indent-tabs-mode: nil
77  * End:
78  */
79