projects / mirror_ubuntu-artful-kernel.git / blame
| Commit | Line | Data |
|---|---|---|
| 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> | |
| 4e57b681 | 12 | #include <linux/signal.h> /* for SIGBUS */ |
| de25968c | 13 | #include <linux/sched.h> /* schow_regs(), force_sig() */ |
| 1da177e4 | 14 | |
| 1da177e4 LT |
15 | #include <asm/sn/addrs.h> |
| 16 | #include <asm/sn/arch.h> | |
| 17 | #include <asm/sn/sn0/hub.h> | |
| 18 | #include <asm/tlbdebug.h> | |
| 19 | #include <asm/traps.h> | |
| 7c0f6ba6 | 20 | #include <linux/uaccess.h> |
| 1da177e4 | 21 | |
| 1da177e4 LT |
22 | static void dump_hub_information(unsigned long errst0, unsigned long errst1) |
| 23 | { | |
| 24 | static char *err_type[2][8] = { | |
| 25 | { NULL, "Uncached Partial Read PRERR", "DERR", "Read Timeout", | |
| 26 | NULL, NULL, NULL, NULL }, | |
| 27 | { "WERR", "Uncached Partial Write", "PWERR", "Write Timeout", | |
| 28 | NULL, NULL, NULL, NULL } | |
| 29 | }; | |
| 30 | int wrb = errst1 & PI_ERR_ST1_WRBRRB_MASK; | |
| 31 | ||
| 32 | if (!(errst0 & PI_ERR_ST0_VALID_MASK)) { | |
| 33 | printk("Hub does not contain valid error information\n"); | |
| 34 | return; | |
| 35 | } | |
| 36 | ||
| 37 | ||
| 38 | printk("Hub has valid error information:\n"); | |
| 39 | if (errst0 & PI_ERR_ST0_OVERRUN_MASK) | |
| 70342287 | 40 | printk("Overrun is set. Error stack may contain additional " |
| 1da177e4 LT |
41 | "information.\n"); |
| 42 | printk("Hub error address is %08lx\n", | |
| 43 | (errst0 & PI_ERR_ST0_ADDR_MASK) >> (PI_ERR_ST0_ADDR_SHFT - 3)); | |
| 44 | printk("Incoming message command 0x%lx\n", | |
| 45 | (errst0 & PI_ERR_ST0_CMD_MASK) >> PI_ERR_ST0_CMD_SHFT); | |
| 46 | printk("Supplemental field of incoming message is 0x%lx\n", | |
| 47 | (errst0 & PI_ERR_ST0_SUPPL_MASK) >> PI_ERR_ST0_SUPPL_SHFT); | |
| 48 | printk("T5 Rn (for RRB only) is 0x%lx\n", | |
| 49 | (errst0 & PI_ERR_ST0_REQNUM_MASK) >> PI_ERR_ST0_REQNUM_SHFT); | |
| 50 | printk("Error type is %s\n", err_type[wrb] | |
| 51 | [(errst0 & PI_ERR_ST0_TYPE_MASK) >> PI_ERR_ST0_TYPE_SHFT] | |
| 52 | ? : "invalid"); | |
| 53 | } | |
| 54 | ||
| 55 | int ip27_be_handler(struct pt_regs *regs, int is_fixup) | |
| 56 | { | |
| 57 | unsigned long errst0, errst1; | |
| 58 | int data = regs->cp0_cause & 4; | |
| 59 | int cpu = LOCAL_HUB_L(PI_CPU_NUM); | |
| 60 | ||
| 61 | if (is_fixup) | |
| 62 | return MIPS_BE_FIXUP; | |
| 63 | ||
| 64 | printk("Slice %c got %cbe at 0x%lx\n", 'A' + cpu, data ? 'd' : 'i', | |
| 65 | regs->cp0_epc); | |
| 66 | printk("Hub information:\n"); | |
| 12e22e8e | 67 | printk("ERR_INT_PEND = 0x%06llx\n", LOCAL_HUB_L(PI_ERR_INT_PEND)); |
| 1da177e4 LT |
68 | errst0 = LOCAL_HUB_L(cpu ? PI_ERR_STATUS0_B : PI_ERR_STATUS0_A); |
| 69 | errst1 = LOCAL_HUB_L(cpu ? PI_ERR_STATUS1_B : PI_ERR_STATUS1_A); | |
| 70 | dump_hub_information(errst0, errst1); | |
| 71 | show_regs(regs); | |
| 72 | dump_tlb_all(); | |
| 73 | while(1); | |
| 74 | force_sig(SIGBUS, current); | |
| 75 | } | |
| 76 | ||
| 77 | void __init ip27_be_init(void) | |
| 78 | { | |
| 79 | /* XXX Initialize all the Hub & Bridge error handling here. */ | |
| 80 | int cpu = LOCAL_HUB_L(PI_CPU_NUM); | |
| 81 | int cpuoff = cpu << 8; | |
| 82 | ||
| 83 | board_be_handler = ip27_be_handler; | |
| 84 | ||
| 85 | LOCAL_HUB_S(PI_ERR_INT_PEND, | |
| 70342287 | 86 | cpu ? PI_ERR_CLEAR_ALL_B : PI_ERR_CLEAR_ALL_A); |
| 1da177e4 LT |
87 | LOCAL_HUB_S(PI_ERR_INT_MASK_A + cpuoff, 0); |
| 88 | LOCAL_HUB_S(PI_ERR_STACK_ADDR_A + cpuoff, 0); | |
| 89 | LOCAL_HUB_S(PI_ERR_STACK_SIZE, 0); /* Disable error stack */ | |
| 90 | LOCAL_HUB_S(PI_SYSAD_ERRCHK_EN, PI_SYSAD_CHECK_ALL); | |
| 91 | } |