1 /* 2 * File: mca.h 3 * Purpose: Machine check handling specific defines 4 * 5 * Copyright (C) 1999, 2004 Silicon Graphics, Inc. 6 * Copyright (C) Vijay Chander <vijay@engr.sgi.com> 7 * Copyright (C) Srinivasa Thirumalachar <sprasad@engr.sgi.com> 8 * Copyright (C) Russ Anderson <rja@sgi.com> 9 */ 10 11 #ifndef _ASM_IA64_MCA_H 12 #define _ASM_IA64_MCA_H 13 14 #if !defined(__ASSEMBLY__) 15 16 #include <linux/interrupt.h> 17 #include <linux/types.h> 18 19 #include <asm/param.h> 20 #include <asm/sal.h> 21 #include <asm/processor.h> 22 #include <asm/mca_asm.h> 23 24 #define IA64_MCA_RENDEZ_TIMEOUT (20 * 1000) /* value in milliseconds - 20 seconds */ 25 26 typedef struct ia64_fptr { 27 unsigned long fp; 28 unsigned long gp; 29 } ia64_fptr_t; 30 31 typedef union cmcv_reg_u { 32 u64 cmcv_regval; 33 struct { 34 u64 cmcr_vector : 8; 35 u64 cmcr_reserved1 : 4; 36 u64 cmcr_ignored1 : 1; 37 u64 cmcr_reserved2 : 3; 38 u64 cmcr_mask : 1; 39 u64 cmcr_ignored2 : 47; 40 } cmcv_reg_s; 41 42 } cmcv_reg_t; 43 44 #define cmcv_mask cmcv_reg_s.cmcr_mask 45 #define cmcv_vector cmcv_reg_s.cmcr_vector 46 47 enum { 48 IA64_MCA_RENDEZ_CHECKIN_NOTDONE = 0x0, 49 IA64_MCA_RENDEZ_CHECKIN_DONE = 0x1, 50 IA64_MCA_RENDEZ_CHECKIN_INIT = 0x2, 51 IA64_MCA_RENDEZ_CHECKIN_CONCURRENT_MCA = 0x3, 52 }; 53 54 /* Information maintained by the MC infrastructure */ 55 typedef struct ia64_mc_info_s { 56 u64 imi_mca_handler; 57 size_t imi_mca_handler_size; 58 u64 imi_monarch_init_handler; 59 size_t imi_monarch_init_handler_size; 60 u64 imi_slave_init_handler; 61 size_t imi_slave_init_handler_size; 62 u8 imi_rendez_checkin[NR_CPUS]; 63 64 } ia64_mc_info_t; 65 66 /* Handover state from SAL to OS and vice versa, for both MCA and INIT events. 67 * Besides the handover state, it also contains some saved registers from the 68 * time of the event. 69 * Note: mca_asm.S depends on the precise layout of this structure. 70 */ 71 72 struct ia64_sal_os_state { 73 74 /* SAL to OS */ 75 unsigned long os_gp; /* GP of the os registered with the SAL, physical */ 76 unsigned long pal_proc; /* PAL_PROC entry point, physical */ 77 unsigned long sal_proc; /* SAL_PROC entry point, physical */ 78 unsigned long rv_rc; /* MCA - Rendezvous state, INIT - reason code */ 79 unsigned long proc_state_param; /* from R18 */ 80 unsigned long monarch; /* 1 for a monarch event, 0 for a slave */ 81 82 /* common */ 83 unsigned long sal_ra; /* Return address in SAL, physical */ 84 unsigned long sal_gp; /* GP of the SAL - physical */ 85 pal_min_state_area_t *pal_min_state; /* from R17. physical in asm, virtual in C */ 86 /* Previous values of IA64_KR(CURRENT) and IA64_KR(CURRENT_STACK). 87 * Note: if the MCA/INIT recovery code wants to resume to a new context 88 * then it must change these values to reflect the new kernel stack. 89 */ 90 unsigned long prev_IA64_KR_CURRENT; /* previous value of IA64_KR(CURRENT) */ 91 unsigned long prev_IA64_KR_CURRENT_STACK; 92 struct task_struct *prev_task; /* previous task, NULL if it is not useful */ 93 /* Some interrupt registers are not saved in minstate, pt_regs or 94 * switch_stack. Because MCA/INIT can occur when interrupts are 95 * disabled, we need to save the additional interrupt registers over 96 * MCA/INIT and resume. 97 */ 98 unsigned long isr; 99 unsigned long ifa; 100 unsigned long itir; 101 unsigned long iipa; 102 unsigned long iim; 103 unsigned long iha; 104 105 /* OS to SAL */ 106 unsigned long os_status; /* OS status to SAL, enum below */ 107 unsigned long context; /* 0 if return to same context 108 1 if return to new context */ 109 110 /* I-resources */ 111 unsigned long iip; 112 unsigned long ipsr; 113 unsigned long ifs; 114 }; 115 116 enum { 117 IA64_MCA_CORRECTED = 0x0, /* Error has been corrected by OS_MCA */ 118 IA64_MCA_WARM_BOOT = -1, /* Warm boot of the system need from SAL */ 119 IA64_MCA_COLD_BOOT = -2, /* Cold boot of the system need from SAL */ 120 IA64_MCA_HALT = -3 /* System to be halted by SAL */ 121 }; 122 123 enum { 124 IA64_INIT_RESUME = 0x0, /* Resume after return from INIT */ 125 IA64_INIT_WARM_BOOT = -1, /* Warm boot of the system need from SAL */ 126 }; 127 128 enum { 129 IA64_MCA_SAME_CONTEXT = 0x0, /* SAL to return to same context */ 130 IA64_MCA_NEW_CONTEXT = -1 /* SAL to return to new context */ 131 }; 132 133 /* Per-CPU MCA state that is too big for normal per-CPU variables. */ 134 135 struct ia64_mca_cpu { 136 u64 mca_stack[KERNEL_STACK_SIZE/8]; 137 u64 init_stack[KERNEL_STACK_SIZE/8]; 138 }; 139 140 /* Array of physical addresses of each CPU's MCA area. */ 141 extern unsigned long __per_cpu_mca[NR_CPUS]; 142 143 extern int cpe_vector; 144 extern int ia64_cpe_irq; 145 extern void ia64_mca_init(void); 146 extern void ia64_mca_irq_init(void); 147 extern void ia64_mca_cpu_init(void *); 148 extern void ia64_os_mca_dispatch(void); 149 extern void ia64_os_mca_dispatch_end(void); 150 extern void ia64_mca_ucmc_handler(struct pt_regs *, struct ia64_sal_os_state *); 151 extern void ia64_init_handler(struct pt_regs *, 152 struct switch_stack *, 153 struct ia64_sal_os_state *); 154 extern void ia64_os_init_on_kdump(void); 155 extern void ia64_monarch_init_handler(void); 156 extern void ia64_slave_init_handler(void); 157 extern void ia64_mca_cmc_vector_setup(void); 158 extern int ia64_reg_MCA_extension(int (*fn)(void *, struct ia64_sal_os_state *)); 159 extern void ia64_unreg_MCA_extension(void); 160 extern unsigned long ia64_get_rnat(unsigned long *); 161 extern void ia64_set_psr_mc(void); 162 extern void ia64_mca_printk(const char * fmt, ...) 163 __attribute__ ((format (printf, 1, 2))); 164 165 struct ia64_mca_notify_die { 166 struct ia64_sal_os_state *sos; 167 int *monarch_cpu; 168 int *data; 169 }; 170 171 DECLARE_PER_CPU(u64, ia64_mca_pal_base); 172 173 #else /* __ASSEMBLY__ */ 174 175 #define IA64_MCA_CORRECTED 0x0 /* Error has been corrected by OS_MCA */ 176 #define IA64_MCA_WARM_BOOT -1 /* Warm boot of the system need from SAL */ 177 #define IA64_MCA_COLD_BOOT -2 /* Cold boot of the system need from SAL */ 178 #define IA64_MCA_HALT -3 /* System to be halted by SAL */ 179 180 #define IA64_INIT_RESUME 0x0 /* Resume after return from INIT */ 181 #define IA64_INIT_WARM_BOOT -1 /* Warm boot of the system need from SAL */ 182 183 #define IA64_MCA_SAME_CONTEXT 0x0 /* SAL to return to same context */ 184 #define IA64_MCA_NEW_CONTEXT -1 /* SAL to return to new context */ 185 186 #endif /* !__ASSEMBLY__ */ 187 #endif /* _ASM_IA64_MCA_H */ 188