/* * 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/signal.h> /* for SIGBUS */ #include <linux/sched.h> /* schow_regs(), force_sig() */ #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 <linux/uaccess.h> 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%06llx\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); }