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> 13#include <linux/signal.h> /* for SIGBUS */ 14#include <linux/sched.h> /* schow_regs(), force_sig() */ 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 24static 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) 42 printk("Overrun is set. Error stack may contain additional " 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 57int 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"); 69 printk("ERR_INT_PEND = 0x%06llx\n", LOCAL_HUB_L(PI_ERR_INT_PEND)); 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 79void __init ip27_be_init(void) 80{ 81 int cpu = LOCAL_HUB_L(PI_CPU_NUM); 82 int cpuoff = cpu << 8; 83 84 board_be_handler = ip27_be_handler; 85 86 LOCAL_HUB_S(PI_ERR_INT_PEND, 87 cpu ? PI_ERR_CLEAR_ALL_B : PI_ERR_CLEAR_ALL_A); 88 LOCAL_HUB_S(PI_ERR_INT_MASK_A + cpuoff, 0); 89 LOCAL_HUB_S(PI_ERR_STACK_ADDR_A + cpuoff, 0); 90 LOCAL_HUB_S(PI_ERR_STACK_SIZE, 0); /* Disable error stack */ 91 LOCAL_HUB_S(PI_SYSAD_ERRCHK_EN, PI_SYSAD_CHECK_ALL); 92} 93