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
 26typedef struct ia64_fptr {
 27	unsigned long fp;
 28	unsigned long gp;
 29} ia64_fptr_t;
 30
 31typedef 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
 47enum {
 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 */
 55typedef 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
 72struct 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
116enum {
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
123enum {
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
128enum {
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
135struct 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.  */
141extern unsigned long __per_cpu_mca[NR_CPUS];
142
143extern int cpe_vector;
144extern int ia64_cpe_irq;
145extern void ia64_mca_init(void);
146extern void ia64_mca_irq_init(void);
147extern void ia64_mca_cpu_init(void *);
148extern void ia64_os_mca_dispatch(void);
149extern void ia64_os_mca_dispatch_end(void);
150extern void ia64_mca_ucmc_handler(struct pt_regs *, struct ia64_sal_os_state *);
151extern void ia64_init_handler(struct pt_regs *,
152			      struct switch_stack *,
153			      struct ia64_sal_os_state *);
154extern void ia64_os_init_on_kdump(void);
155extern void ia64_monarch_init_handler(void);
156extern void ia64_slave_init_handler(void);
157extern void ia64_mca_cmc_vector_setup(void);
158extern int  ia64_reg_MCA_extension(int (*fn)(void *, struct ia64_sal_os_state *));
159extern void ia64_unreg_MCA_extension(void);
160extern unsigned long ia64_get_rnat(unsigned long *);
161extern void ia64_set_psr_mc(void);
162extern void ia64_mca_printk(const char * fmt, ...)
163	 __attribute__ ((format (printf, 1, 2)));
164
165struct ia64_mca_notify_die {
166	struct ia64_sal_os_state *sos;
167	int *monarch_cpu;
168	int *data;
169};
170
171DECLARE_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 */