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 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 } 97