blob: 04cebadc2b3cf41bece15fdf87af92e4f1dfef0b [file] [log] [blame]
Linus Torvalds1da177e2005-04-16 15:20:36 -07001/*
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
4 * for more details.
5 *
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
9 */
10#include <linux/init.h>
11#include <linux/kernel.h>
12#include <linux/module.h>
Tim Schmielau4e57b682005-10-30 15:03:48 -080013#include <linux/signal.h> /* for SIGBUS */
Tim Schmielaude259682006-01-08 01:02:05 -080014#include <linux/sched.h> /* schow_regs(), force_sig() */
Linus Torvalds1da177e2005-04-16 15:20:36 -070015
16#include <asm/module.h>
17#include <asm/sn/addrs.h>
18#include <asm/sn/arch.h>
19#include <asm/sn/sn0/hub.h>
20#include <asm/tlbdebug.h>
21#include <asm/traps.h>
22#include <asm/uaccess.h>
23
Linus Torvalds1da177e2005-04-16 15:20:36 -070024static void dump_hub_information(unsigned long errst0, unsigned long errst1)
25{
26 static char *err_type[2][8] = {
27 { NULL, "Uncached Partial Read PRERR", "DERR", "Read Timeout",
28 NULL, NULL, NULL, NULL },
29 { "WERR", "Uncached Partial Write", "PWERR", "Write Timeout",
30 NULL, NULL, NULL, NULL }
31 };
32 int wrb = errst1 & PI_ERR_ST1_WRBRRB_MASK;
33
34 if (!(errst0 & PI_ERR_ST0_VALID_MASK)) {
35 printk("Hub does not contain valid error information\n");
36 return;
37 }
38
39
40 printk("Hub has valid error information:\n");
41 if (errst0 & PI_ERR_ST0_OVERRUN_MASK)
42 printk("Overrun is set. Error stack may contain additional "
43 "information.\n");
44 printk("Hub error address is %08lx\n",
45 (errst0 & PI_ERR_ST0_ADDR_MASK) >> (PI_ERR_ST0_ADDR_SHFT - 3));
46 printk("Incoming message command 0x%lx\n",
47 (errst0 & PI_ERR_ST0_CMD_MASK) >> PI_ERR_ST0_CMD_SHFT);
48 printk("Supplemental field of incoming message is 0x%lx\n",
49 (errst0 & PI_ERR_ST0_SUPPL_MASK) >> PI_ERR_ST0_SUPPL_SHFT);
50 printk("T5 Rn (for RRB only) is 0x%lx\n",
51 (errst0 & PI_ERR_ST0_REQNUM_MASK) >> PI_ERR_ST0_REQNUM_SHFT);
52 printk("Error type is %s\n", err_type[wrb]
53 [(errst0 & PI_ERR_ST0_TYPE_MASK) >> PI_ERR_ST0_TYPE_SHFT]
54 ? : "invalid");
55}
56
57int ip27_be_handler(struct pt_regs *regs, int is_fixup)
58{
59 unsigned long errst0, errst1;
60 int data = regs->cp0_cause & 4;
61 int cpu = LOCAL_HUB_L(PI_CPU_NUM);
62
63 if (is_fixup)
64 return MIPS_BE_FIXUP;
65
66 printk("Slice %c got %cbe at 0x%lx\n", 'A' + cpu, data ? 'd' : 'i',
67 regs->cp0_epc);
68 printk("Hub information:\n");
Ralf Baechle12e22e82009-03-30 14:49:41 +020069 printk("ERR_INT_PEND = 0x%06llx\n", LOCAL_HUB_L(PI_ERR_INT_PEND));
Linus Torvalds1da177e2005-04-16 15:20:36 -070070 errst0 = LOCAL_HUB_L(cpu ? PI_ERR_STATUS0_B : PI_ERR_STATUS0_A);
71 errst1 = LOCAL_HUB_L(cpu ? PI_ERR_STATUS1_B : PI_ERR_STATUS1_A);
72 dump_hub_information(errst0, errst1);
73 show_regs(regs);
74 dump_tlb_all();
75 while(1);
76 force_sig(SIGBUS, current);
77}
78
79void __init ip27_be_init(void)
80{
81 /* XXX Initialize all the Hub & Bridge error handling here. */
82 int cpu = LOCAL_HUB_L(PI_CPU_NUM);
83 int cpuoff = cpu << 8;
84
85 board_be_handler = ip27_be_handler;
86
87 LOCAL_HUB_S(PI_ERR_INT_PEND,
88 cpu ? PI_ERR_CLEAR_ALL_B : PI_ERR_CLEAR_ALL_A);
89 LOCAL_HUB_S(PI_ERR_INT_MASK_A + cpuoff, 0);
90 LOCAL_HUB_S(PI_ERR_STACK_ADDR_A + cpuoff, 0);
91 LOCAL_HUB_S(PI_ERR_STACK_SIZE, 0); /* Disable error stack */
92 LOCAL_HUB_S(PI_SYSAD_ERRCHK_EN, PI_SYSAD_CHECK_ALL);
93}