1 files changed, 94 insertions, 0 deletions

diff --git a/arch/mips/sgi-ip27/ip27-berr.c b/arch/mips/sgi-ip27/ip27-berr.c
new file mode 100644
index 000000000000..e1829a5d3b19
--- /dev/null
+++ b/arch/mips/sgi-ip27/ip27-berr.c
@@ -0,0 +1,94 @@
+/*
+ * 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
+ * Copyright (C) 2002  Maciej W. Rozycki
+ */
+#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>
+#include <asm/tlbdebug.h>
+#include <asm/traps.h>
+#include <asm/uaccess.h>
+
+extern void dump_tlb_addr(unsigned long addr);
+extern void dump_tlb_all(void);
+
+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");
+}
+
+int ip27_be_handler(struct pt_regs *regs, int is_fixup)
+{
+        unsigned long errst0, errst1;
+        int data = regs->cp0_cause & 4;
+        int cpu = LOCAL_HUB_L(PI_CPU_NUM);
+
+        if (is_fixup)
+                return MIPS_BE_FIXUP;
+
+        printk("Slice %c got %cbe at 0x%lx\n", 'A' + cpu, data ? 'd' : 'i',
+               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);
+        force_sig(SIGBUS, current);
+}
+
+void __init ip27_be_init(void)
+{
+        /* XXX Initialize all the Hub & Bridge error handling here.  */
+        int cpu = LOCAL_HUB_L(PI_CPU_NUM);
+        int cpuoff = cpu << 8;
+
+        board_be_handler = ip27_be_handler;
+
+        LOCAL_HUB_S(PI_ERR_INT_PEND,
+                    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 */
+        LOCAL_HUB_S(PI_SYSAD_ERRCHK_EN, PI_SYSAD_CHECK_ALL);
+}