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1da177e4 LT |
1 | /* |
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> | |
4e57b681 | 13 | #include <linux/signal.h> /* for SIGBUS */ |
de25968c | 14 | #include <linux/sched.h> /* schow_regs(), force_sig() */ |
1da177e4 LT |
15 | |
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> | |
7c0f6ba6 | 22 | #include <linux/uaccess.h> |
1da177e4 | 23 | |
1da177e4 LT |
24 | static 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) | |
70342287 | 42 | printk("Overrun is set. Error stack may contain additional " |
1da177e4 LT |
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 | ||
57 | int 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"); | |
12e22e8e | 69 | printk("ERR_INT_PEND = 0x%06llx\n", LOCAL_HUB_L(PI_ERR_INT_PEND)); |
1da177e4 LT |
70 | 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 | ||
79 | void __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, | |
70342287 | 88 | cpu ? PI_ERR_CLEAR_ALL_B : PI_ERR_CLEAR_ALL_A); |
1da177e4 LT |
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 | } |