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/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> |
16 | |
17 | #include <asm/ptrace.h> |
18 | #include <asm/sn/addrs.h> |
19 | #include <asm/sn/agent.h> |
20 | #include <asm/sn/arch.h> |
21 | #include <asm/tlbdebug.h> |
22 | #include <asm/traps.h> |
23 | #include <linux/uaccess.h> |
24 | |
25 | #include "ip27-common.h" |
26 | |
27 | static void dump_hub_information(unsigned long errst0, unsigned long errst1) |
28 | { |
29 | static char *err_type[2][8] = { |
30 | { NULL, "Uncached Partial Read PRERR" , "DERR" , "Read Timeout" , |
31 | NULL, NULL, NULL, NULL }, |
32 | { "WERR" , "Uncached Partial Write" , "PWERR" , "Write Timeout" , |
33 | NULL, NULL, NULL, NULL } |
34 | }; |
35 | union pi_err_stat0 st0; |
36 | union pi_err_stat1 st1; |
37 | |
38 | st0.pi_stat0_word = errst0; |
39 | st1.pi_stat1_word = errst1; |
40 | |
41 | if (!st0.pi_stat0_fmt.s0_valid) { |
42 | pr_info("Hub does not contain valid error information\n" ); |
43 | return; |
44 | } |
45 | |
46 | pr_info("Hub has valid error information:\n" ); |
47 | if (st0.pi_stat0_fmt.s0_ovr_run) |
48 | pr_info("Overrun is set. Error stack may contain additional " |
49 | "information.\n" ); |
50 | pr_info("Hub error address is %08lx\n" , |
51 | (unsigned long)st0.pi_stat0_fmt.s0_addr); |
52 | pr_info("Incoming message command 0x%lx\n" , |
53 | (unsigned long)st0.pi_stat0_fmt.s0_cmd); |
54 | pr_info("Supplemental field of incoming message is 0x%lx\n" , |
55 | (unsigned long)st0.pi_stat0_fmt.s0_supl); |
56 | pr_info("T5 Rn (for RRB only) is 0x%lx\n" , |
57 | (unsigned long)st0.pi_stat0_fmt.s0_t5_req); |
58 | pr_info("Error type is %s\n" , err_type[st1.pi_stat1_fmt.s1_rw_rb] |
59 | [st0.pi_stat0_fmt.s0_err_type] ? : "invalid" ); |
60 | } |
61 | |
62 | static int ip27_be_handler(struct pt_regs *regs, int is_fixup) |
63 | { |
64 | unsigned long errst0, errst1; |
65 | int data = regs->cp0_cause & 4; |
66 | int cpu = LOCAL_HUB_L(PI_CPU_NUM); |
67 | |
68 | if (is_fixup) |
69 | return MIPS_BE_FIXUP; |
70 | |
71 | printk("Slice %c got %cbe at 0x%lx\n" , 'A' + cpu, data ? 'd' : 'i', |
72 | regs->cp0_epc); |
73 | printk("Hub information:\n" ); |
74 | printk("ERR_INT_PEND = 0x%06llx\n" , LOCAL_HUB_L(PI_ERR_INT_PEND)); |
75 | errst0 = LOCAL_HUB_L(cpu ? PI_ERR_STATUS0_B : PI_ERR_STATUS0_A); |
76 | errst1 = LOCAL_HUB_L(cpu ? PI_ERR_STATUS1_B : PI_ERR_STATUS1_A); |
77 | dump_hub_information(errst0, errst1); |
78 | show_regs(regs); |
79 | dump_tlb_all(); |
80 | while(1); |
81 | force_sig(SIGBUS); |
82 | } |
83 | |
84 | void __init ip27_be_init(void) |
85 | { |
86 | /* XXX Initialize all the Hub & Bridge error handling here. */ |
87 | int cpu = LOCAL_HUB_L(PI_CPU_NUM); |
88 | int cpuoff = cpu << 8; |
89 | |
90 | mips_set_be_handler(ip27_be_handler); |
91 | |
92 | LOCAL_HUB_S(PI_ERR_INT_PEND, |
93 | cpu ? PI_ERR_CLEAR_ALL_B : PI_ERR_CLEAR_ALL_A); |
94 | LOCAL_HUB_S(PI_ERR_INT_MASK_A + cpuoff, 0); |
95 | LOCAL_HUB_S(PI_ERR_STACK_ADDR_A + cpuoff, 0); |
96 | LOCAL_HUB_S(PI_ERR_STACK_SIZE, 0); /* Disable error stack */ |
97 | LOCAL_HUB_S(PI_SYSAD_ERRCHK_EN, PI_SYSAD_CHECK_ALL); |
98 | } |
99 | |