| Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 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> |
| Tim Schmielau | 4e57b68 | 2005-10-30 15:03:48 -0800 | [diff] [blame] | 13 | #include <linux/signal.h> /* for SIGBUS */ |
| Tim Schmielau | de25968 | 2006-01-08 01:02:05 -0800 | [diff] [blame] | 14 | #include <linux/sched.h> /* schow_regs(), force_sig() */ |
| Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 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> |
| 22 | #include <asm/uaccess.h> |
| 23 | |
| 24 | extern void dump_tlb_addr(unsigned long addr); |
| 25 | extern void dump_tlb_all(void); |
| 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 | int wrb = errst1 & PI_ERR_ST1_WRBRRB_MASK; |
| 36 | |
| 37 | if (!(errst0 & PI_ERR_ST0_VALID_MASK)) { |
| 38 | printk("Hub does not contain valid error information\n"); |
| 39 | return; |
| 40 | } |
| 41 | |
| 42 | |
| 43 | printk("Hub has valid error information:\n"); |
| 44 | if (errst0 & PI_ERR_ST0_OVERRUN_MASK) |
| 45 | printk("Overrun is set. Error stack may contain additional " |
| 46 | "information.\n"); |
| 47 | printk("Hub error address is %08lx\n", |
| 48 | (errst0 & PI_ERR_ST0_ADDR_MASK) >> (PI_ERR_ST0_ADDR_SHFT - 3)); |
| 49 | printk("Incoming message command 0x%lx\n", |
| 50 | (errst0 & PI_ERR_ST0_CMD_MASK) >> PI_ERR_ST0_CMD_SHFT); |
| 51 | printk("Supplemental field of incoming message is 0x%lx\n", |
| 52 | (errst0 & PI_ERR_ST0_SUPPL_MASK) >> PI_ERR_ST0_SUPPL_SHFT); |
| 53 | printk("T5 Rn (for RRB only) is 0x%lx\n", |
| 54 | (errst0 & PI_ERR_ST0_REQNUM_MASK) >> PI_ERR_ST0_REQNUM_SHFT); |
| 55 | printk("Error type is %s\n", err_type[wrb] |
| 56 | [(errst0 & PI_ERR_ST0_TYPE_MASK) >> PI_ERR_ST0_TYPE_SHFT] |
| 57 | ? : "invalid"); |
| 58 | } |
| 59 | |
| 60 | int ip27_be_handler(struct pt_regs *regs, int is_fixup) |
| 61 | { |
| 62 | unsigned long errst0, errst1; |
| 63 | int data = regs->cp0_cause & 4; |
| 64 | int cpu = LOCAL_HUB_L(PI_CPU_NUM); |
| 65 | |
| 66 | if (is_fixup) |
| 67 | return MIPS_BE_FIXUP; |
| 68 | |
| 69 | printk("Slice %c got %cbe at 0x%lx\n", 'A' + cpu, data ? 'd' : 'i', |
| 70 | regs->cp0_epc); |
| 71 | printk("Hub information:\n"); |
| 72 | printk("ERR_INT_PEND = 0x%06lx\n", LOCAL_HUB_L(PI_ERR_INT_PEND)); |
| 73 | errst0 = LOCAL_HUB_L(cpu ? PI_ERR_STATUS0_B : PI_ERR_STATUS0_A); |
| 74 | errst1 = LOCAL_HUB_L(cpu ? PI_ERR_STATUS1_B : PI_ERR_STATUS1_A); |
| 75 | dump_hub_information(errst0, errst1); |
| 76 | show_regs(regs); |
| 77 | dump_tlb_all(); |
| 78 | while(1); |
| 79 | force_sig(SIGBUS, current); |
| 80 | } |
| 81 | |
| 82 | void __init ip27_be_init(void) |
| 83 | { |
| 84 | /* XXX Initialize all the Hub & Bridge error handling here. */ |
| 85 | int cpu = LOCAL_HUB_L(PI_CPU_NUM); |
| 86 | int cpuoff = cpu << 8; |
| 87 | |
| 88 | board_be_handler = ip27_be_handler; |
| 89 | |
| 90 | LOCAL_HUB_S(PI_ERR_INT_PEND, |
| 91 | cpu ? PI_ERR_CLEAR_ALL_B : PI_ERR_CLEAR_ALL_A); |
| 92 | LOCAL_HUB_S(PI_ERR_INT_MASK_A + cpuoff, 0); |
| 93 | LOCAL_HUB_S(PI_ERR_STACK_ADDR_A + cpuoff, 0); |
| 94 | LOCAL_HUB_S(PI_ERR_STACK_SIZE, 0); /* Disable error stack */ |
| 95 | LOCAL_HUB_S(PI_SYSAD_ERRCHK_EN, PI_SYSAD_CHECK_ALL); |
| 96 | } |