patch-2.4.10 linux/arch/mips64/sgi-ip27/ip27-berr.c

• Lines: 125
• Date: Sun Sep 9 10:43:02 2001
• Orig file: v2.4.9/linux/arch/mips64/sgi-ip27/ip27-berr.c
• Orig date: Sun Jul 9 22:18:16 2000

diff -u --recursive --new-file v2.4.9/linux/arch/mips64/sgi-ip27/ip27-berr.c linux/arch/mips64/sgi-ip27/ip27-berr.c
@@ -8,6 +8,9 @@
  */
 #include <linux/init.h>
 #include <linux/kernel.h>
+#include <linux/module.h>
+
+#include <asm/module.h>
 #include <asm/sn/addrs.h>
 #include <asm/sn/arch.h>
 #include <asm/sn/sn0/hub.h>
@@ -43,16 +46,43 @@
 	return 0;
 }
 
+extern spinlock_t modlist_lock;
+
 static inline unsigned long
 search_dbe_table(unsigned long addr)
 {
 	unsigned long ret;
 
+#ifndef CONFIG_MODULES
 	/* 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;
+	return ret;
+#else
+	unsigned long flags;
+
+	/* The kernel is the last "module" -- no need to treat it special.  */
+	struct module *mp;
+	struct archdata *ap;
+
+	spin_lock_irqsave(&modlist_lock, flags);
+	for (mp = module_list; mp != NULL; mp = mp->next) {
+		if (!mod_member_present(mp, archdata_end) ||
+        	    !mod_archdata_member_present(mp, struct archdata,
+						 dbe_table_end))
+			continue;
+		ap = (struct archdata *)(mod->archdata_start);
+
+		if (ap->dbe_table_start == NULL ||
+		    !(mp->flags & (MOD_RUNNING | MOD_INITIALIZING)))
+			continue;
+		ret = search_one_table(ap->dbe_table_start,
+				       ap->dbe_table_end - 1, addr);
+		if (ret)
+			break;
+	}
+	spin_unlock_irqrestore(&modlist_lock, flags);
+	return ret;
+#endif
 }
 
 void do_ibe(struct pt_regs *regs)
@@ -64,9 +94,43 @@
 	while(1);
 }
 
+static void dump_hub_information(unsigned long errst0, unsigned long errst1)
+{
+	static char *err_type[2][8] = {
+		{ NULL, "Uncached Partial Read PRERR", "DERR", "Read Timeout",
+		  NULL, NULL, NULL, NULL },
+		{ "WERR", "Uncached Partial Write", "PWERR", "Write Timeout",
+		  NULL, NULL, NULL, NULL }
+	};
+	int wrb = errst1 & PI_ERR_ST1_WRBRRB_MASK;
+
+	if (!(errst0 & PI_ERR_ST0_VALID_MASK)) {
+		printk("Hub does not contain valid error information\n");
+		return;
+	}
+
+	
+	printk("Hub has valid error information:\n");
+	if (errst0 & PI_ERR_ST0_OVERRUN_MASK)
+		printk("Overrun is set.  Error stack may contain additional "
+		       "information.\n");
+	printk("Hub error address is %08lx\n",
+	       (errst0 & PI_ERR_ST0_ADDR_MASK) >> (PI_ERR_ST0_ADDR_SHFT - 3));
+	printk("Incoming message command 0x%lx\n",
+	       (errst0 & PI_ERR_ST0_CMD_MASK) >> PI_ERR_ST0_CMD_SHFT);
+	printk("Supplemental field of incoming message is 0x%lx\n",
+	       (errst0 & PI_ERR_ST0_SUPPL_MASK) >> PI_ERR_ST0_SUPPL_SHFT);
+	printk("T5 Rn (for RRB only) is 0x%lx\n",
+	       (errst0 & PI_ERR_ST0_REQNUM_MASK) >> PI_ERR_ST0_REQNUM_SHFT);
+	printk("Error type is %s\n", err_type[wrb]
+	       [(errst0 & PI_ERR_ST0_TYPE_MASK) >> PI_ERR_ST0_TYPE_SHFT]
+		? : "invalid");
+}
+
 void do_dbe(struct pt_regs *regs)
 {
-	unsigned long fixup;
+	unsigned long fixup, errst0, errst1;
+	int cpu = LOCAL_HUB_L(PI_CPU_NUM);
 
 	fixup = search_dbe_table(regs->cp0_epc);
 	if (fixup) {
@@ -77,7 +141,12 @@
 		return;
 	}
 
-	printk("Got dbe at 0x%lx\n", regs->cp0_epc);
+	printk("Slice %c got dbe at 0x%lx\n", 'A' + cpu, regs->cp0_epc);
+	printk("Hub information:\n");
+	printk("ERR_INT_PEND = 0x%06lx\n", LOCAL_HUB_L(PI_ERR_INT_PEND));
+	errst0 = LOCAL_HUB_L(cpu ? PI_ERR_STATUS0_B : PI_ERR_STATUS0_A);
+	errst1 = LOCAL_HUB_L(cpu ? PI_ERR_STATUS1_B : PI_ERR_STATUS1_A);
+	dump_hub_information(errst0, errst1);
 	show_regs(regs);
 	dump_tlb_all();
 	while(1);
@@ -95,7 +164,7 @@
 	set_except_vector(7, handle_dbe);
 
 	LOCAL_HUB_S(PI_ERR_INT_PEND,
-	            cpu ? PI_ERR_CLEAR_ALL_A : PI_ERR_CLEAR_ALL_B);
+	            cpu ? PI_ERR_CLEAR_ALL_B : PI_ERR_CLEAR_ALL_A);
 	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 */