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Linux/arch/ia64/include/asm/mca.h

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  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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