[mirror_ubuntu-artful-kernel.git] / arch / mips / sgi-ip27 / ip27-berr.c

/*
 * 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 <linux/sched/debug.h>
#include <linux/sched/signal.h>

#include <asm/ptrace.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 <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);
}
Commit	Line	Data
1da177e4 LT	1	/*
	2	* This file is subject to the terms and conditions of the GNU General Public
	3	* License. See the file "COPYING" in the main directory of this archive
	4	* for more details.
	5	*
	6	* Copyright (C) 1994, 1995, 1996, 1999, 2000 by Ralf Baechle
	7	* Copyright (C) 1999, 2000 by Silicon Graphics
	8	* Copyright (C) 2002 Maciej W. Rozycki
	9	*/
	10	#include <linux/init.h>
	11	#include <linux/kernel.h>
4e57b681	12	#include <linux/signal.h> /* for SIGBUS */
de25968c	13	#include <linux/sched.h> /* schow_regs(), force_sig() */
b17b0153	14	#include <linux/sched/debug.h>
fc69910f	15	#include <linux/sched/signal.h>
1da177e4	16
fc69910f	17	#include <asm/ptrace.h>
1da177e4 LT	18	#include <asm/sn/addrs.h>
	19	#include <asm/sn/arch.h>
	20	#include <asm/sn/sn0/hub.h>
	21	#include <asm/tlbdebug.h>
	22	#include <asm/traps.h>
7c0f6ba6	23	#include <linux/uaccess.h>
1da177e4	24
1da177e4 LT	25	static void dump_hub_information(unsigned long errst0, unsigned long errst1)
	26	{
	27	static char *err_type[2][8] = {
	28	{ NULL, "Uncached Partial Read PRERR", "DERR", "Read Timeout",
	29	NULL, NULL, NULL, NULL },
	30	{ "WERR", "Uncached Partial Write", "PWERR", "Write Timeout",
	31	NULL, NULL, NULL, NULL }
	32	};
	33	int wrb = errst1 & PI_ERR_ST1_WRBRRB_MASK;
	34
	35	if (!(errst0 & PI_ERR_ST0_VALID_MASK)) {
	36	printk("Hub does not contain valid error information\n");
	37	return;
	38	}
	39
	40
	41	printk("Hub has valid error information:\n");
	42	if (errst0 & PI_ERR_ST0_OVERRUN_MASK)
70342287	43	printk("Overrun is set. Error stack may contain additional "
1da177e4 LT	44	"information.\n");
	45	printk("Hub error address is %08lx\n",
	46	(errst0 & PI_ERR_ST0_ADDR_MASK) >> (PI_ERR_ST0_ADDR_SHFT - 3));
	47	printk("Incoming message command 0x%lx\n",
	48	(errst0 & PI_ERR_ST0_CMD_MASK) >> PI_ERR_ST0_CMD_SHFT);
	49	printk("Supplemental field of incoming message is 0x%lx\n",
	50	(errst0 & PI_ERR_ST0_SUPPL_MASK) >> PI_ERR_ST0_SUPPL_SHFT);
	51	printk("T5 Rn (for RRB only) is 0x%lx\n",
	52	(errst0 & PI_ERR_ST0_REQNUM_MASK) >> PI_ERR_ST0_REQNUM_SHFT);
	53	printk("Error type is %s\n", err_type[wrb]
	54	[(errst0 & PI_ERR_ST0_TYPE_MASK) >> PI_ERR_ST0_TYPE_SHFT]
	55	? : "invalid");
	56	}
	57
	58	int ip27_be_handler(struct pt_regs *regs, int is_fixup)
	59	{
	60	unsigned long errst0, errst1;
	61	int data = regs->cp0_cause & 4;
	62	int cpu = LOCAL_HUB_L(PI_CPU_NUM);
	63
	64	if (is_fixup)
	65	return MIPS_BE_FIXUP;
	66
	67	printk("Slice %c got %cbe at 0x%lx\n", 'A' + cpu, data ? 'd' : 'i',
	68	regs->cp0_epc);
	69	printk("Hub information:\n");
12e22e8e	70	printk("ERR_INT_PEND = 0x%06llx\n", LOCAL_HUB_L(PI_ERR_INT_PEND));
1da177e4 LT	71	errst0 = LOCAL_HUB_L(cpu ? PI_ERR_STATUS0_B : PI_ERR_STATUS0_A);
	72	errst1 = LOCAL_HUB_L(cpu ? PI_ERR_STATUS1_B : PI_ERR_STATUS1_A);
	73	dump_hub_information(errst0, errst1);
	74	show_regs(regs);
	75	dump_tlb_all();
	76	while(1);
	77	force_sig(SIGBUS, current);
	78	}
	79
	80	void __init ip27_be_init(void)
	81	{
	82	/* XXX Initialize all the Hub & Bridge error handling here. */
	83	int cpu = LOCAL_HUB_L(PI_CPU_NUM);
	84	int cpuoff = cpu << 8;
	85
	86	board_be_handler = ip27_be_handler;
	87
	88	LOCAL_HUB_S(PI_ERR_INT_PEND,
70342287	89	cpu ? PI_ERR_CLEAR_ALL_B : PI_ERR_CLEAR_ALL_A);
1da177e4 LT	90	LOCAL_HUB_S(PI_ERR_INT_MASK_A + cpuoff, 0);
	91	LOCAL_HUB_S(PI_ERR_STACK_ADDR_A + cpuoff, 0);
	92	LOCAL_HUB_S(PI_ERR_STACK_SIZE, 0); /* Disable error stack */
	93	LOCAL_HUB_S(PI_SYSAD_ERRCHK_EN, PI_SYSAD_CHECK_ALL);
	94	}