1/* 2 * linux/arch/alpha/kernel/err_ev6.c 3 * 4 * Copyright (C) 2000 Jeff Wiedemeier (Compaq Computer Corporation) 5 * 6 * Error handling code supporting Alpha systems 7 */ 8 9#include <linux/init.h> 10#include <linux/sched.h> 11 12#include <asm/io.h> 13#include <asm/irq_regs.h> 14#include <asm/hwrpb.h> 15#include <asm/smp.h> 16#include <asm/err_common.h> 17#include <asm/err_ev6.h> 18 19#include "err_impl.h" 20#include "proto.h" 21 22static int 23ev6_parse_ibox(u64 i_stat, int print) 24{ 25 int status = MCHK_DISPOSITION_REPORT; 26 27#define EV6__I_STAT__PAR (1UL << 29) 28#define EV6__I_STAT__ERRMASK (EV6__I_STAT__PAR) 29 30 if (!(i_stat & EV6__I_STAT__ERRMASK)) 31 return MCHK_DISPOSITION_UNKNOWN_ERROR; 32 33 if (!print) 34 return status; 35 36 if (i_stat & EV6__I_STAT__PAR) 37 printk("%s Icache parity error\n", err_print_prefix); 38 39 return status; 40} 41 42static int 43ev6_parse_mbox(u64 mm_stat, u64 d_stat, u64 c_stat, int print) 44{ 45 int status = MCHK_DISPOSITION_REPORT; 46 47#define EV6__MM_STAT__DC_TAG_PERR (1UL << 10) 48#define EV6__MM_STAT__ERRMASK (EV6__MM_STAT__DC_TAG_PERR) 49#define EV6__D_STAT__TPERR_P0 (1UL << 0) 50#define EV6__D_STAT__TPERR_P1 (1UL << 1) 51#define EV6__D_STAT__ECC_ERR_ST (1UL << 2) 52#define EV6__D_STAT__ECC_ERR_LD (1UL << 3) 53#define EV6__D_STAT__SEO (1UL << 4) 54#define EV6__D_STAT__ERRMASK (EV6__D_STAT__TPERR_P0 | \ 55 EV6__D_STAT__TPERR_P1 | \ 56 EV6__D_STAT__ECC_ERR_ST | \ 57 EV6__D_STAT__ECC_ERR_LD | \ 58 EV6__D_STAT__SEO) 59 60 if (!(d_stat & EV6__D_STAT__ERRMASK) && 61 !(mm_stat & EV6__MM_STAT__ERRMASK)) 62 return MCHK_DISPOSITION_UNKNOWN_ERROR; 63 64 if (!print) 65 return status; 66 67 if (mm_stat & EV6__MM_STAT__DC_TAG_PERR) 68 printk("%s Dcache tag parity error on probe\n", 69 err_print_prefix); 70 if (d_stat & EV6__D_STAT__TPERR_P0) 71 printk("%s Dcache tag parity error - pipe 0\n", 72 err_print_prefix); 73 if (d_stat & EV6__D_STAT__TPERR_P1) 74 printk("%s Dcache tag parity error - pipe 1\n", 75 err_print_prefix); 76 if (d_stat & EV6__D_STAT__ECC_ERR_ST) 77 printk("%s ECC error occurred on a store\n", 78 err_print_prefix); 79 if (d_stat & EV6__D_STAT__ECC_ERR_LD) 80 printk("%s ECC error occurred on a %s load\n", 81 err_print_prefix, 82 c_stat ? "" : "speculative "); 83 if (d_stat & EV6__D_STAT__SEO) 84 printk("%s Dcache second error\n", err_print_prefix); 85 86 return status; 87} 88 89static int 90ev6_parse_cbox(u64 c_addr, u64 c1_syn, u64 c2_syn, 91 u64 c_stat, u64 c_sts, int print) 92{ 93 char *sourcename[] = { "UNKNOWN", "UNKNOWN", "UNKNOWN", 94 "MEMORY", "BCACHE", "DCACHE", 95 "BCACHE PROBE", "BCACHE PROBE" }; 96 char *streamname[] = { "D", "I" }; 97 char *bitsname[] = { "SINGLE", "DOUBLE" }; 98 int status = MCHK_DISPOSITION_REPORT; 99 int source = -1, stream = -1, bits = -1; 100 101#define EV6__C_STAT__BC_PERR (0x01) 102#define EV6__C_STAT__DC_PERR (0x02) 103#define EV6__C_STAT__DSTREAM_MEM_ERR (0x03) 104#define EV6__C_STAT__DSTREAM_BC_ERR (0x04) 105#define EV6__C_STAT__DSTREAM_DC_ERR (0x05) 106#define EV6__C_STAT__PROBE_BC_ERR0 (0x06) /* both 6 and 7 indicate... */ 107#define EV6__C_STAT__PROBE_BC_ERR1 (0x07) /* ...probe bc error. */ 108#define EV6__C_STAT__ISTREAM_MEM_ERR (0x0B) 109#define EV6__C_STAT__ISTREAM_BC_ERR (0x0C) 110#define EV6__C_STAT__DSTREAM_MEM_DBL (0x13) 111#define EV6__C_STAT__DSTREAM_BC_DBL (0x14) 112#define EV6__C_STAT__ISTREAM_MEM_DBL (0x1B) 113#define EV6__C_STAT__ISTREAM_BC_DBL (0x1C) 114#define EV6__C_STAT__SOURCE_MEMORY (0x03) 115#define EV6__C_STAT__SOURCE_BCACHE (0x04) 116#define EV6__C_STAT__SOURCE__S (0) 117#define EV6__C_STAT__SOURCE__M (0x07) 118#define EV6__C_STAT__ISTREAM__S (3) 119#define EV6__C_STAT__ISTREAM__M (0x01) 120#define EV6__C_STAT__DOUBLE__S (4) 121#define EV6__C_STAT__DOUBLE__M (0x01) 122#define EV6__C_STAT__ERRMASK (0x1F) 123#define EV6__C_STS__SHARED (1 << 0) 124#define EV6__C_STS__DIRTY (1 << 1) 125#define EV6__C_STS__VALID (1 << 2) 126#define EV6__C_STS__PARITY (1 << 3) 127 128 if (!(c_stat & EV6__C_STAT__ERRMASK)) 129 return MCHK_DISPOSITION_UNKNOWN_ERROR; 130 131 if (!print) 132 return status; 133 134 source = EXTRACT(c_stat, EV6__C_STAT__SOURCE); 135 stream = EXTRACT(c_stat, EV6__C_STAT__ISTREAM); 136 bits = EXTRACT(c_stat, EV6__C_STAT__DOUBLE); 137 138 if (c_stat & EV6__C_STAT__BC_PERR) { 139 printk("%s Bcache tag parity error\n", err_print_prefix); 140 source = -1; 141 } 142 143 if (c_stat & EV6__C_STAT__DC_PERR) { 144 printk("%s Dcache tag parity error\n", err_print_prefix); 145 source = -1; 146 } 147 148 if (c_stat == EV6__C_STAT__PROBE_BC_ERR0 || 149 c_stat == EV6__C_STAT__PROBE_BC_ERR1) { 150 printk("%s Bcache single-bit error on a probe hit\n", 151 err_print_prefix); 152 source = -1; 153 } 154 155 if (source != -1) 156 printk("%s %s-STREAM %s-BIT ECC error from %s\n", 157 err_print_prefix, 158 streamname[stream], bitsname[bits], sourcename[source]); 159 160 printk("%s Address: 0x%016lx\n" 161 " Syndrome[upper.lower]: %02lx.%02lx\n", 162 err_print_prefix, 163 c_addr, 164 c2_syn, c1_syn); 165 166 if (source == EV6__C_STAT__SOURCE_MEMORY || 167 source == EV6__C_STAT__SOURCE_BCACHE) 168 printk("%s Block status: %s%s%s%s\n", 169 err_print_prefix, 170 (c_sts & EV6__C_STS__SHARED) ? "SHARED " : "", 171 (c_sts & EV6__C_STS__DIRTY) ? "DIRTY " : "", 172 (c_sts & EV6__C_STS__VALID) ? "VALID " : "", 173 (c_sts & EV6__C_STS__PARITY) ? "PARITY " : ""); 174 175 return status; 176} 177 178void 179ev6_register_error_handlers(void) 180{ 181 /* None right now. */ 182} 183 184int 185ev6_process_logout_frame(struct el_common *mchk_header, int print) 186{ 187 struct el_common_EV6_mcheck *ev6mchk = 188 (struct el_common_EV6_mcheck *)mchk_header; 189 int status = MCHK_DISPOSITION_UNKNOWN_ERROR; 190 191 status |= ev6_parse_ibox(ev6mchk->I_STAT, print); 192 status |= ev6_parse_mbox(ev6mchk->MM_STAT, ev6mchk->DC_STAT, 193 ev6mchk->C_STAT, print); 194 status |= ev6_parse_cbox(ev6mchk->C_ADDR, ev6mchk->DC1_SYNDROME, 195 ev6mchk->DC0_SYNDROME, ev6mchk->C_STAT, 196 ev6mchk->C_STS, print); 197 198 if (!print) 199 return status; 200 201 if (status != MCHK_DISPOSITION_DISMISS) { 202 char *saved_err_prefix = err_print_prefix; 203 204 /* 205 * Dump some additional information from the frame 206 */ 207 printk("%s EXC_ADDR: 0x%016lx IER_CM: 0x%016lx" 208 " ISUM: 0x%016lx\n" 209 " PAL_BASE: 0x%016lx I_CTL: 0x%016lx" 210 " PCTX: 0x%016lx\n", 211 err_print_prefix, 212 ev6mchk->EXC_ADDR, ev6mchk->IER_CM, ev6mchk->ISUM, 213 ev6mchk->PAL_BASE, ev6mchk->I_CTL, ev6mchk->PCTX); 214 215 if (status == MCHK_DISPOSITION_UNKNOWN_ERROR) { 216 printk("%s UNKNOWN error, frame follows:\n", 217 err_print_prefix); 218 } else { 219 /* had decode -- downgrade print level for frame */ 220 err_print_prefix = KERN_NOTICE; 221 } 222 223 mchk_dump_logout_frame(mchk_header); 224 225 err_print_prefix = saved_err_prefix; 226 } 227 228 return status; 229} 230 231void 232ev6_machine_check(u64 vector, u64 la_ptr) 233{ 234 struct el_common *mchk_header = (struct el_common *)la_ptr; 235 236 /* 237 * Sync the processor 238 */ 239 mb(); 240 draina(); 241 242 /* 243 * Parse the logout frame without printing first. If the only error(s) 244 * found are have a disposition of "dismiss", then just dismiss them 245 * and don't print any message 246 */ 247 if (ev6_process_logout_frame(mchk_header, 0) != 248 MCHK_DISPOSITION_DISMISS) { 249 char *saved_err_prefix = err_print_prefix; 250 err_print_prefix = KERN_CRIT; 251 252 /* 253 * Either a nondismissable error was detected or no 254 * recognized error was detected in the logout frame 255 * -- report the error in either case 256 */ 257 printk("%s*CPU %s Error (Vector 0x%x) reported on CPU %d:\n", 258 err_print_prefix, 259 (vector == SCB_Q_PROCERR)?"Correctable":"Uncorrectable", 260 (unsigned int)vector, (int)smp_processor_id()); 261 262 ev6_process_logout_frame(mchk_header, 1); 263 dik_show_regs(get_irq_regs(), NULL); 264 265 err_print_prefix = saved_err_prefix; 266 } 267 268 /* 269 * Release the logout frame 270 */ 271 wrmces(0x7); 272 mb(); 273} 274