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1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 | /* * This file is subject to the terms and conditions of the GNU General Public * License. See the file "COPYING" in the main directory of this archive * for more details. * * Copyright (C) 1994, 1995, 1996, 1999, 2000 by Ralf Baechle * Copyright (C) 1999, 2000 by Silicon Graphics */ #include <linux/init.h> #include <linux/kernel.h> #include <asm/sn/addrs.h> #include <asm/sn/arch.h> #include <asm/sn/sn0/hub.h> #include <asm/uaccess.h> extern void dump_tlb_addr(unsigned long addr); extern void dump_tlb_all(void); extern asmlinkage void handle_ibe(void); extern asmlinkage void handle_dbe(void); extern const struct exception_table_entry __start___dbe_table[]; extern const struct exception_table_entry __stop___dbe_table[]; static inline unsigned long search_one_table(const struct exception_table_entry *first, const struct exception_table_entry *last, unsigned long value) { while (first <= last) { const struct exception_table_entry *mid; long diff; mid = (last - first) / 2 + first; diff = mid->insn - value; if (diff == 0) return mid->nextinsn; else if (diff < 0) first = mid+1; else last = mid-1; } return 0; } static inline unsigned long search_dbe_table(unsigned long addr) { unsigned long ret; /* There is only the kernel to search. */ ret = search_one_table(__start___dbe_table, __stop___dbe_table-1, addr); if (ret) return ret; return 0; } void do_ibe(struct pt_regs *regs) { printk("Got ibe at 0x%lx\n", regs->cp0_epc); show_regs(regs); dump_tlb_addr(regs->cp0_epc); force_sig(SIGBUS, current); while(1); } void do_dbe(struct pt_regs *regs) { unsigned long fixup; fixup = search_dbe_table(regs->cp0_epc); if (fixup) { long new_epc; new_epc = fixup_exception(dpf_reg, fixup, regs->cp0_epc); regs->cp0_epc = new_epc; return; } printk("Got dbe at 0x%lx\n", regs->cp0_epc); show_regs(regs); dump_tlb_all(); while(1); force_sig(SIGBUS, current); } void __init bus_error_init(void) { /* XXX Initialize all the Hub & Bridge error handling here. */ int cpu = LOCAL_HUB_L(PI_CPU_NUM); int cpuoff = cpu << 8; set_except_vector(6, handle_ibe); set_except_vector(7, handle_dbe); LOCAL_HUB_S(PI_ERR_INT_PEND, cpu ? PI_ERR_CLEAR_ALL_A : PI_ERR_CLEAR_ALL_B); LOCAL_HUB_S(PI_ERR_INT_MASK_A + cpuoff, 0); LOCAL_HUB_S(PI_ERR_STACK_ADDR_A + cpuoff, 0); LOCAL_HUB_S(PI_ERR_STACK_SIZE, 0); /* Disable error stack */ LOCAL_HUB_S(PI_SYSAD_ERRCHK_EN, PI_SYSAD_CHECK_ALL); } |