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/interrupt.h> 18 #include <linux/types.h> 19 20 #include <asm/param.h> 21 #include <asm/sal.h> 22 #include <asm/processor.h> 23 #include <asm/mca_asm.h> 24 25 #define IA64_MCA_RENDEZ_TIMEOUT (20 * 1000) /* value in milliseconds - 20 seconds */ 26 27 typedef struct ia64_fptr { 28 unsigned long fp; 29 unsigned long gp; 30 } ia64_fptr_t; 31 32 typedef union cmcv_reg_u { 33 u64 cmcv_regval; 34 struct { 35 u64 cmcr_vector : 8; 36 u64 cmcr_reserved1 : 4; 37 u64 cmcr_ignored1 : 1; 38 u64 cmcr_reserved2 : 3; 39 u64 cmcr_mask : 1; 40 u64 cmcr_ignored2 : 47; 41 } cmcv_reg_s; 42 43 } cmcv_reg_t; 44 45 #define cmcv_mask cmcv_reg_s.cmcr_mask 46 #define cmcv_vector cmcv_reg_s.cmcr_vector 47 48 enum { 49 IA64_MCA_RENDEZ_CHECKIN_NOTDONE = 0x0, 50 IA64_MCA_RENDEZ_CHECKIN_DONE = 0x1, 51 IA64_MCA_RENDEZ_CHECKIN_INIT = 0x2, 52 IA64_MCA_RENDEZ_CHECKIN_CONCURRENT_MCA = 0x3, 53 }; 54 55 /* Information maintained by the MC infrastructure */ 56 typedef struct ia64_mc_info_s { 57 u64 imi_mca_handler; 58 size_t imi_mca_handler_size; 59 u64 imi_monarch_init_handler; 60 size_t imi_monarch_init_handler_size; 61 u64 imi_slave_init_handler; 62 size_t imi_slave_init_handler_size; 63 u8 imi_rendez_checkin[NR_CPUS]; 64 65 } ia64_mc_info_t; 66 67 /* Handover state from SAL to OS and vice versa, for both MCA and INIT events. 68 * Besides the handover state, it also contains some saved registers from the 69 * time of the event. 70 * Note: mca_asm.S depends on the precise layout of this structure. 71 */ 72 73 struct ia64_sal_os_state { 74 75 /* SAL to OS */ 76 unsigned long os_gp; /* GP of the os registered with the SAL, physical */ 77 unsigned long pal_proc; /* PAL_PROC entry point, physical */ 78 unsigned long sal_proc; /* SAL_PROC entry point, physical */ 79 unsigned long rv_rc; /* MCA - Rendezvous state, INIT - reason code */ 80 unsigned long proc_state_param; /* from R18 */ 81 unsigned long monarch; /* 1 for a monarch event, 0 for a slave */ 82 83 /* common */ 84 unsigned long sal_ra; /* Return address in SAL, physical */ 85 unsigned long sal_gp; /* GP of the SAL - physical */ 86 pal_min_state_area_t *pal_min_state; /* from R17. physical in asm, virtual in C */ 87 /* Previous values of IA64_KR(CURRENT) and IA64_KR(CURRENT_STACK). 88 * Note: if the MCA/INIT recovery code wants to resume to a new context 89 * then it must change these values to reflect the new kernel stack. 90 */ 91 unsigned long prev_IA64_KR_CURRENT; /* previous value of IA64_KR(CURRENT) */ 92 unsigned long prev_IA64_KR_CURRENT_STACK; 93 struct task_struct *prev_task; /* previous task, NULL if it is not useful */ 94 /* Some interrupt registers are not saved in minstate, pt_regs or 95 * switch_stack. Because MCA/INIT can occur when interrupts are 96 * disabled, we need to save the additional interrupt registers over 97 * MCA/INIT and resume. 98 */ 99 unsigned long isr; 100 unsigned long ifa; 101 unsigned long itir; 102 unsigned long iipa; 103 unsigned long iim; 104 unsigned long iha; 105 106 /* OS to SAL */ 107 unsigned long os_status; /* OS status to SAL, enum below */ 108 unsigned long context; /* 0 if return to same context 109 1 if return to new context */ 110 111 /* I-resources */ 112 unsigned long iip; 113 unsigned long ipsr; 114 unsigned long ifs; 115 }; 116 117 enum { 118 IA64_MCA_CORRECTED = 0x0, /* Error has been corrected by OS_MCA */ 119 IA64_MCA_WARM_BOOT = -1, /* Warm boot of the system need from SAL */ 120 IA64_MCA_COLD_BOOT = -2, /* Cold boot of the system need from SAL */ 121 IA64_MCA_HALT = -3 /* System to be halted by SAL */ 122 }; 123 124 enum { 125 IA64_INIT_RESUME = 0x0, /* Resume after return from INIT */ 126 IA64_INIT_WARM_BOOT = -1, /* Warm boot of the system need from SAL */ 127 }; 128 129 enum { 130 IA64_MCA_SAME_CONTEXT = 0x0, /* SAL to return to same context */ 131 IA64_MCA_NEW_CONTEXT = -1 /* SAL to return to new context */ 132 }; 133 134 /* Per-CPU MCA state that is too big for normal per-CPU variables. */ 135 136 struct ia64_mca_cpu { 137 u64 mca_stack[KERNEL_STACK_SIZE/8]; 138 u64 init_stack[KERNEL_STACK_SIZE/8]; 139 }; 140 141 /* Array of physical addresses of each CPU's MCA area. */ 142 extern unsigned long __per_cpu_mca[NR_CPUS]; 143 144 extern int cpe_vector; 145 extern int ia64_cpe_irq; 146 extern void ia64_mca_init(void); 147 extern void ia64_mca_irq_init(void); 148 extern void ia64_mca_cpu_init(void *); 149 extern void ia64_os_mca_dispatch(void); 150 extern void ia64_os_mca_dispatch_end(void); 151 extern void ia64_mca_ucmc_handler(struct pt_regs *, struct ia64_sal_os_state *); 152 extern void ia64_init_handler(struct pt_regs *, 153 struct switch_stack *, 154 struct ia64_sal_os_state *); 155 extern void ia64_os_init_on_kdump(void); 156 extern void ia64_monarch_init_handler(void); 157 extern void ia64_slave_init_handler(void); 158 extern void ia64_mca_cmc_vector_setup(void); 159 extern int ia64_reg_MCA_extension(int (*fn)(void *, struct ia64_sal_os_state *)); 160 extern void ia64_unreg_MCA_extension(void); 161 extern unsigned long ia64_get_rnat(unsigned long *); 162 extern void ia64_set_psr_mc(void); 163 extern void ia64_mca_printk(const char * fmt, ...) 164 __attribute__ ((format (printf, 1, 2))); 165 166 struct ia64_mca_notify_die { 167 struct ia64_sal_os_state *sos; 168 int *monarch_cpu; 169 int *data; 170 }; 171 172 DECLARE_PER_CPU(u64, ia64_mca_pal_base); 173 174 #else /* __ASSEMBLY__ */ 175 176 #define IA64_MCA_CORRECTED 0x0 /* Error has been corrected by OS_MCA */ 177 #define IA64_MCA_WARM_BOOT -1 /* Warm boot of the system need from SAL */ 178 #define IA64_MCA_COLD_BOOT -2 /* Cold boot of the system need from SAL */ 179 #define IA64_MCA_HALT -3 /* System to be halted by SAL */ 180 181 #define IA64_INIT_RESUME 0x0 /* Resume after return from INIT */ 182 #define IA64_INIT_WARM_BOOT -1 /* Warm boot of the system need from SAL */ 183 184 #define IA64_MCA_SAME_CONTEXT 0x0 /* SAL to return to same context */ 185 #define IA64_MCA_NEW_CONTEXT -1 /* SAL to return to new context */ 186 187 #endif /* !__ASSEMBLY__ */ 188 #endif /* _ASM_IA64_MCA_H */ 189