Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 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 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 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, |
Keith Owens | 7f613c7 | 2005-09-11 17:22:53 +1000 | [diff] [blame] | 49 | IA64_MCA_RENDEZ_CHECKIN_DONE = 0x1, |
| 50 | IA64_MCA_RENDEZ_CHECKIN_INIT = 0x2, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 51 | }; |
| 52 | |
| 53 | /* Information maintained by the MC infrastructure */ |
| 54 | typedef struct ia64_mc_info_s { |
| 55 | u64 imi_mca_handler; |
| 56 | size_t imi_mca_handler_size; |
| 57 | u64 imi_monarch_init_handler; |
| 58 | size_t imi_monarch_init_handler_size; |
| 59 | u64 imi_slave_init_handler; |
| 60 | size_t imi_slave_init_handler_size; |
| 61 | u8 imi_rendez_checkin[NR_CPUS]; |
| 62 | |
| 63 | } ia64_mc_info_t; |
| 64 | |
Keith Owens | 7f613c7 | 2005-09-11 17:22:53 +1000 | [diff] [blame] | 65 | /* Handover state from SAL to OS and vice versa, for both MCA and INIT events. |
| 66 | * Besides the handover state, it also contains some saved registers from the |
| 67 | * time of the event. |
| 68 | * Note: mca_asm.S depends on the precise layout of this structure. |
| 69 | */ |
| 70 | |
| 71 | struct ia64_sal_os_state { |
| 72 | /* SAL to OS, must be at offset 0 */ |
| 73 | u64 os_gp; /* GP of the os registered with the SAL, physical */ |
| 74 | u64 pal_proc; /* PAL_PROC entry point, physical */ |
| 75 | u64 sal_proc; /* SAL_PROC entry point, physical */ |
| 76 | u64 rv_rc; /* MCA - Rendezvous state, INIT - reason code */ |
| 77 | u64 proc_state_param; /* from R18 */ |
| 78 | u64 monarch; /* 1 for a monarch event, 0 for a slave */ |
| 79 | /* common, must follow SAL to OS */ |
| 80 | u64 sal_ra; /* Return address in SAL, physical */ |
| 81 | u64 sal_gp; /* GP of the SAL - physical */ |
| 82 | pal_min_state_area_t *pal_min_state; /* from R17. physical in asm, virtual in C */ |
Keith Owens | 20bb8685 | 2005-09-22 18:49:15 +1000 | [diff] [blame] | 83 | /* Previous values of IA64_KR(CURRENT) and IA64_KR(CURRENT_STACK). |
| 84 | * Note: if the MCA/INIT recovery code wants to resume to a new context |
| 85 | * then it must change these values to reflect the new kernel stack. |
| 86 | */ |
Keith Owens | 7f613c7 | 2005-09-11 17:22:53 +1000 | [diff] [blame] | 87 | u64 prev_IA64_KR_CURRENT; /* previous value of IA64_KR(CURRENT) */ |
Keith Owens | 20bb8685 | 2005-09-22 18:49:15 +1000 | [diff] [blame] | 88 | u64 prev_IA64_KR_CURRENT_STACK; |
Keith Owens | 7f613c7 | 2005-09-11 17:22:53 +1000 | [diff] [blame] | 89 | struct task_struct *prev_task; /* previous task, NULL if it is not useful */ |
| 90 | /* Some interrupt registers are not saved in minstate, pt_regs or |
| 91 | * switch_stack. Because MCA/INIT can occur when interrupts are |
| 92 | * disabled, we need to save the additional interrupt registers over |
| 93 | * MCA/INIT and resume. |
| 94 | */ |
| 95 | u64 isr; |
| 96 | u64 ifa; |
| 97 | u64 itir; |
| 98 | u64 iipa; |
| 99 | u64 iim; |
| 100 | u64 iha; |
| 101 | /* OS to SAL, must follow common */ |
| 102 | u64 os_status; /* OS status to SAL, enum below */ |
| 103 | u64 context; /* 0 if return to same context |
| 104 | 1 if return to new context */ |
| 105 | }; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 106 | |
| 107 | enum { |
| 108 | IA64_MCA_CORRECTED = 0x0, /* Error has been corrected by OS_MCA */ |
| 109 | IA64_MCA_WARM_BOOT = -1, /* Warm boot of the system need from SAL */ |
| 110 | IA64_MCA_COLD_BOOT = -2, /* Cold boot of the system need from SAL */ |
| 111 | IA64_MCA_HALT = -3 /* System to be halted by SAL */ |
| 112 | }; |
| 113 | |
| 114 | enum { |
Keith Owens | 7f613c7 | 2005-09-11 17:22:53 +1000 | [diff] [blame] | 115 | IA64_INIT_RESUME = 0x0, /* Resume after return from INIT */ |
| 116 | IA64_INIT_WARM_BOOT = -1, /* Warm boot of the system need from SAL */ |
| 117 | }; |
| 118 | |
| 119 | enum { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 120 | IA64_MCA_SAME_CONTEXT = 0x0, /* SAL to return to same context */ |
| 121 | IA64_MCA_NEW_CONTEXT = -1 /* SAL to return to new context */ |
| 122 | }; |
| 123 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 124 | /* Per-CPU MCA state that is too big for normal per-CPU variables. */ |
| 125 | |
| 126 | struct ia64_mca_cpu { |
Keith Owens | 7f613c7 | 2005-09-11 17:22:53 +1000 | [diff] [blame] | 127 | u64 mca_stack[KERNEL_STACK_SIZE/8]; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 128 | u64 init_stack[KERNEL_STACK_SIZE/8]; |
Keith Owens | 7f613c7 | 2005-09-11 17:22:53 +1000 | [diff] [blame] | 129 | }; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 130 | |
| 131 | /* Array of physical addresses of each CPU's MCA area. */ |
| 132 | extern unsigned long __per_cpu_mca[NR_CPUS]; |
| 133 | |
Ashok Raj | ff74190 | 2005-11-11 14:32:40 -0800 | [diff] [blame] | 134 | extern int cpe_vector; |
| 135 | extern int ia64_cpe_irq; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 136 | extern void ia64_mca_init(void); |
| 137 | extern void ia64_mca_cpu_init(void *); |
| 138 | extern void ia64_os_mca_dispatch(void); |
| 139 | extern void ia64_os_mca_dispatch_end(void); |
Keith Owens | 7f613c7 | 2005-09-11 17:22:53 +1000 | [diff] [blame] | 140 | extern void ia64_mca_ucmc_handler(struct pt_regs *, struct ia64_sal_os_state *); |
| 141 | extern void ia64_init_handler(struct pt_regs *, |
| 142 | struct switch_stack *, |
| 143 | struct ia64_sal_os_state *); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 144 | extern void ia64_monarch_init_handler(void); |
| 145 | extern void ia64_slave_init_handler(void); |
| 146 | extern void ia64_mca_cmc_vector_setup(void); |
Keith Owens | 7f613c7 | 2005-09-11 17:22:53 +1000 | [diff] [blame] | 147 | extern int ia64_reg_MCA_extension(int (*fn)(void *, struct ia64_sal_os_state *)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 148 | extern void ia64_unreg_MCA_extension(void); |
Keith Owens | 7f613c7 | 2005-09-11 17:22:53 +1000 | [diff] [blame] | 149 | extern u64 ia64_get_rnat(u64 *); |
| 150 | |
| 151 | #else /* __ASSEMBLY__ */ |
| 152 | |
| 153 | #define IA64_MCA_CORRECTED 0x0 /* Error has been corrected by OS_MCA */ |
| 154 | #define IA64_MCA_WARM_BOOT -1 /* Warm boot of the system need from SAL */ |
| 155 | #define IA64_MCA_COLD_BOOT -2 /* Cold boot of the system need from SAL */ |
| 156 | #define IA64_MCA_HALT -3 /* System to be halted by SAL */ |
| 157 | |
| 158 | #define IA64_INIT_RESUME 0x0 /* Resume after return from INIT */ |
| 159 | #define IA64_INIT_WARM_BOOT -1 /* Warm boot of the system need from SAL */ |
| 160 | |
| 161 | #define IA64_MCA_SAME_CONTEXT 0x0 /* SAL to return to same context */ |
| 162 | #define IA64_MCA_NEW_CONTEXT -1 /* SAL to return to new context */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 163 | |
| 164 | #endif /* !__ASSEMBLY__ */ |
| 165 | #endif /* _ASM_IA64_MCA_H */ |