2 * This file is subject to the terms and conditions of the GNU General Public
3 * License. See the file "COPYING" in the main directory of this archive
6 * Copyright (C) 1994, 1995, 1996, 1999, 2000 by Ralf Baechle
7 * Copyright (C) 1999, 2000 by Silicon Graphics
8 * Copyright (C) 2002 Maciej W. Rozycki
10 #include <linux/init.h>
11 #include <linux/kernel.h>
12 #include <linux/signal.h> /* for SIGBUS */
13 #include <linux/sched.h> /* schow_regs(), force_sig() */
14 #include <linux/sched/debug.h>
15 #include <linux/sched/signal.h>
17 #include <asm/ptrace.h>
18 #include <asm/sn/addrs.h>
19 #include <asm/sn/arch.h>
20 #include <asm/sn/sn0/hub.h>
21 #include <asm/tlbdebug.h>
22 #include <asm/traps.h>
23 #include <linux/uaccess.h>
25 static void dump_hub_information(unsigned long errst0
, unsigned long errst1
)
27 static char *err_type
[2][8] = {
28 { NULL
, "Uncached Partial Read PRERR", "DERR", "Read Timeout",
29 NULL
, NULL
, NULL
, NULL
},
30 { "WERR", "Uncached Partial Write", "PWERR", "Write Timeout",
31 NULL
, NULL
, NULL
, NULL
}
33 int wrb
= errst1
& PI_ERR_ST1_WRBRRB_MASK
;
35 if (!(errst0
& PI_ERR_ST0_VALID_MASK
)) {
36 printk("Hub does not contain valid error information\n");
41 printk("Hub has valid error information:\n");
42 if (errst0
& PI_ERR_ST0_OVERRUN_MASK
)
43 printk("Overrun is set. Error stack may contain additional "
45 printk("Hub error address is %08lx\n",
46 (errst0
& PI_ERR_ST0_ADDR_MASK
) >> (PI_ERR_ST0_ADDR_SHFT
- 3));
47 printk("Incoming message command 0x%lx\n",
48 (errst0
& PI_ERR_ST0_CMD_MASK
) >> PI_ERR_ST0_CMD_SHFT
);
49 printk("Supplemental field of incoming message is 0x%lx\n",
50 (errst0
& PI_ERR_ST0_SUPPL_MASK
) >> PI_ERR_ST0_SUPPL_SHFT
);
51 printk("T5 Rn (for RRB only) is 0x%lx\n",
52 (errst0
& PI_ERR_ST0_REQNUM_MASK
) >> PI_ERR_ST0_REQNUM_SHFT
);
53 printk("Error type is %s\n", err_type
[wrb
]
54 [(errst0
& PI_ERR_ST0_TYPE_MASK
) >> PI_ERR_ST0_TYPE_SHFT
]
58 int ip27_be_handler(struct pt_regs
*regs
, int is_fixup
)
60 unsigned long errst0
, errst1
;
61 int data
= regs
->cp0_cause
& 4;
62 int cpu
= LOCAL_HUB_L(PI_CPU_NUM
);
67 printk("Slice %c got %cbe at 0x%lx\n", 'A' + cpu
, data
? 'd' : 'i',
69 printk("Hub information:\n");
70 printk("ERR_INT_PEND = 0x%06llx\n", LOCAL_HUB_L(PI_ERR_INT_PEND
));
71 errst0
= LOCAL_HUB_L(cpu
? PI_ERR_STATUS0_B
: PI_ERR_STATUS0_A
);
72 errst1
= LOCAL_HUB_L(cpu
? PI_ERR_STATUS1_B
: PI_ERR_STATUS1_A
);
73 dump_hub_information(errst0
, errst1
);
77 force_sig(SIGBUS
, current
);
80 void __init
ip27_be_init(void)
82 /* XXX Initialize all the Hub & Bridge error handling here. */
83 int cpu
= LOCAL_HUB_L(PI_CPU_NUM
);
84 int cpuoff
= cpu
<< 8;
86 board_be_handler
= ip27_be_handler
;
88 LOCAL_HUB_S(PI_ERR_INT_PEND
,
89 cpu
? PI_ERR_CLEAR_ALL_B
: PI_ERR_CLEAR_ALL_A
);
90 LOCAL_HUB_S(PI_ERR_INT_MASK_A
+ cpuoff
, 0);
91 LOCAL_HUB_S(PI_ERR_STACK_ADDR_A
+ cpuoff
, 0);
92 LOCAL_HUB_S(PI_ERR_STACK_SIZE
, 0); /* Disable error stack */
93 LOCAL_HUB_S(PI_SYSAD_ERRCHK_EN
, PI_SYSAD_CHECK_ALL
);