1 /* SPDX-License-Identifier: GPL-2.0 */
2 /*
3 * File: mca.h
4 * Purpose: Machine check handling specific defines
5 *
6 * Copyright (C) 1999, 2004 Silicon Graphics, Inc.
7 * Copyright (C) Vijay Chander <vijay@engr.sgi.com>
8 * Copyright (C) Srinivasa Thirumalachar <sprasad@engr.sgi.com>
9 * Copyright (C) Russ Anderson <rja@sgi.com>
10 */
11
12 #ifndef _ASM_IA64_MCA_H
13 #define _ASM_IA64_MCA_H
14
15 #if !defined(__ASSEMBLY__)
16
17 #include <linux/percpu.h>
18 #include <linux/threads.h>
19 #include <linux/types.h>
20 #include <asm/ptrace.h>
21
22 #define IA64_MCA_RENDEZ_TIMEOUT (20 * 1000) /* value in milliseconds - 20 seconds */
23
24 typedef struct ia64_fptr {
25 unsigned long fp;
26 unsigned long gp;
27 } ia64_fptr_t;
28
29 typedef union cmcv_reg_u {
30 u64 cmcv_regval;
31 struct {
32 u64 cmcr_vector : 8;
33 u64 cmcr_reserved1 : 4;
34 u64 cmcr_ignored1 : 1;
35 u64 cmcr_reserved2 : 3;
36 u64 cmcr_mask : 1;
37 u64 cmcr_ignored2 : 47;
38 } cmcv_reg_s;
39
40 } cmcv_reg_t;
41
42 #define cmcv_mask cmcv_reg_s.cmcr_mask
43 #define cmcv_vector cmcv_reg_s.cmcr_vector
44
45 enum {
46 IA64_MCA_RENDEZ_CHECKIN_NOTDONE = 0x0,
47 IA64_MCA_RENDEZ_CHECKIN_DONE = 0x1,
48 IA64_MCA_RENDEZ_CHECKIN_INIT = 0x2,
49 IA64_MCA_RENDEZ_CHECKIN_CONCURRENT_MCA = 0x3,
50 };
51
52 /* Information maintained by the MC infrastructure */
53 typedef struct ia64_mc_info_s {
54 u64 imi_mca_handler;
55 size_t imi_mca_handler_size;
56 u64 imi_monarch_init_handler;
57 size_t imi_monarch_init_handler_size;
58 u64 imi_slave_init_handler;
59 size_t imi_slave_init_handler_size;
60 u8 imi_rendez_checkin[NR_CPUS];
61
62 } ia64_mc_info_t;
63
64 /* Handover state from SAL to OS and vice versa, for both MCA and INIT events.
65 * Besides the handover state, it also contains some saved registers from the
66 * time of the event.
67 * Note: mca_asm.S depends on the precise layout of this structure.
68 */
69
70 struct ia64_sal_os_state {
71
72 /* SAL to OS */
73 unsigned long os_gp; /* GP of the os registered with the SAL, physical */
74 unsigned long pal_proc; /* PAL_PROC entry point, physical */
75 unsigned long sal_proc; /* SAL_PROC entry point, physical */
76 unsigned long rv_rc; /* MCA - Rendezvous state, INIT - reason code */
77 unsigned long proc_state_param; /* from R18 */
78 unsigned long monarch; /* 1 for a monarch event, 0 for a slave */
79
80 /* common */
81 unsigned long sal_ra; /* Return address in SAL, physical */
82 unsigned long sal_gp; /* GP of the SAL - physical */
83 struct pal_min_state_area *pal_min_state; /* from R17. physical in asm, virtual in C */
84 /* Previous values of IA64_KR(CURRENT) and IA64_KR(CURRENT_STACK).
85 * Note: if the MCA/INIT recovery code wants to resume to a new context
86 * then it must change these values to reflect the new kernel stack.
87 */
88 unsigned long prev_IA64_KR_CURRENT; /* previous value of IA64_KR(CURRENT) */
89 unsigned long prev_IA64_KR_CURRENT_STACK;
90 struct task_struct *prev_task; /* previous task, NULL if it is not useful */
91 /* Some interrupt registers are not saved in minstate, pt_regs or
92 * switch_stack. Because MCA/INIT can occur when interrupts are
93 * disabled, we need to save the additional interrupt registers over
94 * MCA/INIT and resume.
95 */
96 unsigned long isr;
97 unsigned long ifa;
98 unsigned long itir;
99 unsigned long iipa;
100 unsigned long iim;
101 unsigned long iha;
102
103 /* OS to SAL */
104 unsigned long os_status; /* OS status to SAL, enum below */
105 unsigned long context; /* 0 if return to same context
106 1 if return to new context */
107
108 /* I-resources */
109 unsigned long iip;
110 unsigned long ipsr;
111 unsigned long ifs;
112 };
113
114 enum {
115 IA64_MCA_CORRECTED = 0x0, /* Error has been corrected by OS_MCA */
116 IA64_MCA_WARM_BOOT = -1, /* Warm boot of the system need from SAL */
117 IA64_MCA_COLD_BOOT = -2, /* Cold boot of the system need from SAL */
118 IA64_MCA_HALT = -3 /* System to be halted by SAL */
119 };
120
121 enum {
122 IA64_INIT_RESUME = 0x0, /* Resume after return from INIT */
123 IA64_INIT_WARM_BOOT = -1, /* Warm boot of the system need from SAL */
124 };
125
126 enum {
127 IA64_MCA_SAME_CONTEXT = 0x0, /* SAL to return to same context */
128 IA64_MCA_NEW_CONTEXT = -1 /* SAL to return to new context */
129 };
130
131 /* Per-CPU MCA state that is too big for normal per-CPU variables. */
132
133 struct ia64_mca_cpu {
134 u64 mca_stack[KERNEL_STACK_SIZE/8];
135 u64 init_stack[KERNEL_STACK_SIZE/8];
136 };
137
138 /* Array of physical addresses of each CPU's MCA area. */
139 extern unsigned long __per_cpu_mca[NR_CPUS];
140
141 extern int cpe_vector;
142 extern int ia64_cpe_irq;
143 extern void ia64_mca_init(void);
144 extern void ia64_mca_irq_init(void);
145 extern void ia64_mca_cpu_init(void *);
146 extern void ia64_os_mca_dispatch(void);
147 extern void ia64_os_mca_dispatch_end(void);
148 extern void ia64_mca_ucmc_handler(struct pt_regs *, struct ia64_sal_os_state *);
149 extern void ia64_init_handler(struct pt_regs *,
150 struct switch_stack *,
151 struct ia64_sal_os_state *);
152 extern void ia64_os_init_on_kdump(void);
153 extern void ia64_monarch_init_handler(void);
154 extern void ia64_slave_init_handler(void);
155 extern void ia64_mca_cmc_vector_setup(void);
156 extern int ia64_reg_MCA_extension(int (*fn)(void *, struct ia64_sal_os_state *));
157 extern void ia64_unreg_MCA_extension(void);
158 extern unsigned long ia64_get_rnat(unsigned long *);
159 extern void ia64_set_psr_mc(void);
160 extern void ia64_mca_printk(const char * fmt, ...)
161 __attribute__ ((format (printf, 1, 2)));
162
163 struct ia64_mca_notify_die {
164 struct ia64_sal_os_state *sos;
165 int *monarch_cpu;
166 int *data;
167 };
168
169 DECLARE_PER_CPU(u64, ia64_mca_pal_base);
170
171 #else /* __ASSEMBLY__ */
172
173 #define IA64_MCA_CORRECTED 0x0 /* Error has been corrected by OS_MCA */
174 #define IA64_MCA_WARM_BOOT -1 /* Warm boot of the system need from SAL */
175 #define IA64_MCA_COLD_BOOT -2 /* Cold boot of the system need from SAL */
176 #define IA64_MCA_HALT -3 /* System to be halted by SAL */
177
178 #define IA64_INIT_RESUME 0x0 /* Resume after return from INIT */
179 #define IA64_INIT_WARM_BOOT -1 /* Warm boot of the system need from SAL */
180
181 #define IA64_MCA_SAME_CONTEXT 0x0 /* SAL to return to same context */
182 #define IA64_MCA_NEW_CONTEXT -1 /* SAL to return to new context */
183
184 #endif /* !__ASSEMBLY__ */
185 #endif /* _ASM_IA64_MCA_H */
186
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