diff options
Diffstat (limited to 'arch/mips/sgi-ip27/ip27-berr.c')
| -rw-r--r-- | arch/mips/sgi-ip27/ip27-berr.c | 93 |
1 files changed, 93 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 000000000..692778da9 --- /dev/null +++ b/arch/mips/sgi-ip27/ip27-berr.c @@ -0,0 +1,93 @@ +/* + * 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 <linux/signal.h> /* for SIGBUS */ +#include <linux/sched.h> /* schow_regs(), force_sig() */ + +#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> + +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); +} |