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 24typedef struct ia64_fptr { 25 unsigned long fp; 26 unsigned long gp; 27} ia64_fptr_t; 28 29typedef 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 45enum { 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 */ 53typedef 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 70struct 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 114enum { 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 121enum { 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 126enum { 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 133struct 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. */ 139extern unsigned long __per_cpu_mca[NR_CPUS]; 140 141extern int cpe_vector; 142extern int ia64_cpe_irq; 143extern void ia64_mca_init(void); 144extern void ia64_mca_irq_init(void); 145extern void ia64_mca_cpu_init(void *); 146extern void ia64_os_mca_dispatch(void); 147extern void ia64_os_mca_dispatch_end(void); 148extern void ia64_mca_ucmc_handler(struct pt_regs *, struct ia64_sal_os_state *); 149extern void ia64_init_handler(struct pt_regs *, 150 struct switch_stack *, 151 struct ia64_sal_os_state *); 152extern void ia64_os_init_on_kdump(void); 153extern void ia64_monarch_init_handler(void); 154extern void ia64_slave_init_handler(void); 155extern void ia64_mca_cmc_vector_setup(void); 156extern int ia64_reg_MCA_extension(int (*fn)(void *, struct ia64_sal_os_state *)); 157extern void ia64_unreg_MCA_extension(void); 158extern unsigned long ia64_get_rnat(unsigned long *); 159extern void ia64_set_psr_mc(void); 160extern void ia64_mca_printk(const char * fmt, ...) 161 __attribute__ ((format (printf, 1, 2))); 162 163struct ia64_mca_notify_die { 164 struct ia64_sal_os_state *sos; 165 int *monarch_cpu; 166 int *data; 167}; 168 169DECLARE_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