97 lines
3.0 KiB
C
97 lines
3.0 KiB
C
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/*
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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/signal.h> /* for SIGBUS */
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#include <linux/sched.h> /* schow_regs(), force_sig() */
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#include <linux/sched/debug.h>
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#include <linux/sched/signal.h>
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#include <asm/ptrace.h>
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#include <asm/sn/addrs.h>
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#include <asm/sn/agent.h>
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#include <asm/sn/arch.h>
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#include <asm/tlbdebug.h>
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#include <asm/traps.h>
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#include <linux/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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union pi_err_stat0 st0;
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union pi_err_stat1 st1;
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st0.pi_stat0_word = errst0;
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st1.pi_stat1_word = errst1;
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if (!st0.pi_stat0_fmt.s0_valid) {
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pr_info("Hub does not contain valid error information\n");
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return;
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}
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pr_info("Hub has valid error information:\n");
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if (st0.pi_stat0_fmt.s0_ovr_run)
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pr_info("Overrun is set. Error stack may contain additional "
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"information.\n");
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pr_info("Hub error address is %08lx\n",
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(unsigned long)st0.pi_stat0_fmt.s0_addr);
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pr_info("Incoming message command 0x%lx\n",
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(unsigned long)st0.pi_stat0_fmt.s0_cmd);
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pr_info("Supplemental field of incoming message is 0x%lx\n",
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(unsigned long)st0.pi_stat0_fmt.s0_supl);
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pr_info("T5 Rn (for RRB only) is 0x%lx\n",
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(unsigned long)st0.pi_stat0_fmt.s0_t5_req);
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pr_info("Error type is %s\n", err_type[st1.pi_stat1_fmt.s1_rw_rb]
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[st0.pi_stat0_fmt.s0_err_type] ? : "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%06llx\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);
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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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mips_set_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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