File: /usr/src/linux/include/asm-mips64/sn/nmi.h
1 /*
2 * This file is subject to the terms and conditions of the GNU General Public
3 * License. See the file "COPYING" in the main directory of this archive
4 * for more details.
5 *
6 * Copyright (C) 1992 - 1997 Silicon Graphics, Inc.
7 */
8 #ifndef __ASM_SN_NMI_H
9 #define __ASM_SN_NMI_H
10
11 #ident "$Revision: 1.2 $"
12
13 #include <asm/sn/addrs.h>
14
15 /*
16 * The launch data structure resides at a fixed place in each node's memory
17 * and is used to communicate between the master processor and the slave
18 * processors.
19 *
20 * The master stores launch parameters in the launch structure
21 * corresponding to a target processor that is in a slave loop, then sends
22 * an interrupt to the slave processor. The slave calls the desired
23 * function, followed by an optional rendezvous function, then returns to
24 * the slave loop. The master does not wait for the slaves before
25 * returning.
26 *
27 * There is an array of launch structures, one per CPU on the node. One
28 * interrupt level is used per CPU.
29 */
30
31 #define NMI_MAGIC 0x48414d4d455201
32 #define NMI_SIZEOF 0x40
33
34 #define NMI_OFF_MAGIC 0x00 /* Struct offsets for assembly */
35 #define NMI_OFF_FLAGS 0x08
36 #define NMI_OFF_CALL 0x10
37 #define NMI_OFF_CALLC 0x18
38 #define NMI_OFF_CALLPARM 0x20
39 #define NMI_OFF_GMASTER 0x28
40
41 /*
42 * The NMI routine is called only if the complement address is
43 * correct.
44 *
45 * Before control is transferred to a routine, the compliment address
46 * is zeroed (invalidated) to prevent an accidental call from a spurious
47 * interrupt.
48 *
49 */
50
51 #ifdef _LANGUAGE_C
52
53 typedef struct nmi_s {
54 volatile unsigned long magic; /* Magic number */
55 volatile unsigned long flags; /* Combination of flags above */
56 volatile void *call_addr; /* Routine for slave to call */
57 volatile void *call_addr_c; /* 1's complement of address */
58 volatile void *call_parm; /* Single parm passed to call */
59 volatile unsigned long gmaster; /* Flag true only on global master*/
60 } nmi_t;
61
62 #endif /* _LANGUAGE_C */
63
64 /* Following definitions are needed both in the prom & the kernel
65 * to identify the format of the nmi cpu register save area in the
66 * low memory on each node.
67 */
68 #ifdef _LANGUAGE_C
69
70 struct reg_struct {
71 unsigned long gpr[32];
72 unsigned long sr;
73 unsigned long cause;
74 unsigned long epc;
75 unsigned long badva;
76 unsigned long error_epc;
77 unsigned long cache_err;
78 unsigned long nmi_sr;
79 };
80
81 #endif /* _LANGUAGE_C */
82
83 /* These are the assembly language offsets into the reg_struct structure */
84
85 #define R0_OFF 0x0
86 #define R1_OFF 0x8
87 #define R2_OFF 0x10
88 #define R3_OFF 0x18
89 #define R4_OFF 0x20
90 #define R5_OFF 0x28
91 #define R6_OFF 0x30
92 #define R7_OFF 0x38
93 #define R8_OFF 0x40
94 #define R9_OFF 0x48
95 #define R10_OFF 0x50
96 #define R11_OFF 0x58
97 #define R12_OFF 0x60
98 #define R13_OFF 0x68
99 #define R14_OFF 0x70
100 #define R15_OFF 0x78
101 #define R16_OFF 0x80
102 #define R17_OFF 0x88
103 #define R18_OFF 0x90
104 #define R19_OFF 0x98
105 #define R20_OFF 0xa0
106 #define R21_OFF 0xa8
107 #define R22_OFF 0xb0
108 #define R23_OFF 0xb8
109 #define R24_OFF 0xc0
110 #define R25_OFF 0xc8
111 #define R26_OFF 0xd0
112 #define R27_OFF 0xd8
113 #define R28_OFF 0xe0
114 #define R29_OFF 0xe8
115 #define R30_OFF 0xf0
116 #define R31_OFF 0xf8
117 #define SR_OFF 0x100
118 #define CAUSE_OFF 0x108
119 #define EPC_OFF 0x110
120 #define BADVA_OFF 0x118
121 #define ERROR_EPC_OFF 0x120
122 #define CACHE_ERR_OFF 0x128
123 #define NMISR_OFF 0x130
124
125 #endif /* __ASM_SN_NMI_H */
126