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xianfeng |
/*
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* This file is subject to the terms and conditions of the GNU General Public
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* License. See the file "COPYING" in the main directory of this archive
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* for more details.
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*
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* Copyright (C) 1994, 1995, 1996, 1999, 2000 by Ralf Baechle
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* Copyright (C) 1999, 2000 by Silicon Graphics
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* Copyright (C) 2002 Maciej W. Rozycki
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*/
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#include <linux/init.h>
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#include <linux/kernel.h>
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#include <linux/module.h>
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#include <linux/signal.h> /* for SIGBUS */
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#include <linux/sched.h> /* schow_regs(), force_sig() */
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#include <asm/module.h>
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#include <asm/sn/addrs.h>
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#include <asm/sn/arch.h>
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#include <asm/sn/sn0/hub.h>
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#include <asm/tlbdebug.h>
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#include <asm/traps.h>
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#include <asm/uaccess.h>
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static void dump_hub_information(unsigned long errst0, unsigned long errst1)
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{
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static char *err_type[2][8] = {
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{ NULL, "Uncached Partial Read PRERR", "DERR", "Read Timeout",
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NULL, NULL, NULL, NULL },
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{ "WERR", "Uncached Partial Write", "PWERR", "Write Timeout",
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NULL, NULL, NULL, NULL }
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};
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int wrb = errst1 & PI_ERR_ST1_WRBRRB_MASK;
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if (!(errst0 & PI_ERR_ST0_VALID_MASK)) {
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printk("Hub does not contain valid error information\n");
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return;
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}
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printk("Hub has valid error information:\n");
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if (errst0 & PI_ERR_ST0_OVERRUN_MASK)
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printk("Overrun is set. Error stack may contain additional "
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"information.\n");
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printk("Hub error address is %08lx\n",
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(errst0 & PI_ERR_ST0_ADDR_MASK) >> (PI_ERR_ST0_ADDR_SHFT - 3));
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printk("Incoming message command 0x%lx\n",
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(errst0 & PI_ERR_ST0_CMD_MASK) >> PI_ERR_ST0_CMD_SHFT);
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printk("Supplemental field of incoming message is 0x%lx\n",
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(errst0 & PI_ERR_ST0_SUPPL_MASK) >> PI_ERR_ST0_SUPPL_SHFT);
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printk("T5 Rn (for RRB only) is 0x%lx\n",
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(errst0 & PI_ERR_ST0_REQNUM_MASK) >> PI_ERR_ST0_REQNUM_SHFT);
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printk("Error type is %s\n", err_type[wrb]
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[(errst0 & PI_ERR_ST0_TYPE_MASK) >> PI_ERR_ST0_TYPE_SHFT]
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? : "invalid");
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}
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int ip27_be_handler(struct pt_regs *regs, int is_fixup)
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{
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unsigned long errst0, errst1;
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int data = regs->cp0_cause & 4;
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int cpu = LOCAL_HUB_L(PI_CPU_NUM);
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if (is_fixup)
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return MIPS_BE_FIXUP;
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printk("Slice %c got %cbe at 0x%lx\n", 'A' + cpu, data ? 'd' : 'i',
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regs->cp0_epc);
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printk("Hub information:\n");
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printk("ERR_INT_PEND = 0x%06lx\n", LOCAL_HUB_L(PI_ERR_INT_PEND));
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errst0 = LOCAL_HUB_L(cpu ? PI_ERR_STATUS0_B : PI_ERR_STATUS0_A);
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errst1 = LOCAL_HUB_L(cpu ? PI_ERR_STATUS1_B : PI_ERR_STATUS1_A);
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dump_hub_information(errst0, errst1);
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show_regs(regs);
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dump_tlb_all();
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while(1);
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force_sig(SIGBUS, current);
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}
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void __init ip27_be_init(void)
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{
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/* XXX Initialize all the Hub & Bridge error handling here. */
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int cpu = LOCAL_HUB_L(PI_CPU_NUM);
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int cpuoff = cpu << 8;
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board_be_handler = ip27_be_handler;
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LOCAL_HUB_S(PI_ERR_INT_PEND,
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cpu ? PI_ERR_CLEAR_ALL_B : PI_ERR_CLEAR_ALL_A);
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LOCAL_HUB_S(PI_ERR_INT_MASK_A + cpuoff, 0);
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LOCAL_HUB_S(PI_ERR_STACK_ADDR_A + cpuoff, 0);
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LOCAL_HUB_S(PI_ERR_STACK_SIZE, 0); /* Disable error stack */
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LOCAL_HUB_S(PI_SYSAD_ERRCHK_EN, PI_SYSAD_CHECK_ALL);
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}
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