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/*
* SN1 Platform specific error Support
*
* Copyright (C) 2001-2002 Silicon Graphics, Inc. All rights reserved.
*
* This program is free software; you can redistribute it and/or modify it
* under the terms of version 2 of the GNU General Public License
* as published by the Free Software Foundation.
*
* This program is distributed in the hope that it would be useful, but
* WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
*
* Further, this software is distributed without any warranty that it is
* free of the rightful claim of any third person regarding infringement
* or the like. Any license provided herein, whether implied or
* otherwise, applies only to this software file. Patent licenses, if
* any, provided herein do not apply to combinations of this program with
* other software, or any other product whatsoever.
*
* You should have received a copy of the GNU General Public
* License along with this program; if not, write the Free Software
* Foundation, Inc., 59 Temple Place - Suite 330, Boston MA 02111-1307, USA.
*
* Contact information: Silicon Graphics, Inc., 1600 Amphitheatre Pkwy,
* Mountain View, CA 94043, or:
*
* http://www.sgi.com
*
* For further information regarding this notice, see:
*
* http://oss.sgi.com/projects/GenInfo/NoticeExplan
*/
#include <linux/kernel.h>
#include <linux/sched.h>
#include <linux/mm.h>
#include <asm/ptrace.h>
#include <linux/devfs_fs_kernel.h>
#include <asm/smp.h>
#include <asm/sn/sn_cpuid.h>
#include <asm/sn/sn1/bedrock.h>
#include <asm/sn/intr.h>
#include <asm/sn/addrs.h>
/**
* snia_error_intr_handler - handle SN specific error interrupts
* @irq: error interrupt received
* @devid: device causing the interrupt
* @pt_regs: saved register state
*
* This routine is called when certain interrupts occur on SN systems.
* It will either recover from the situations that caused the interrupt
* or panic.
*/
void
snia_error_intr_handler(int irq, void *devid, struct pt_regs *pt_regs)
{
unsigned long long intpend_val;
unsigned long long bit;
switch (irq) {
case SGI_UART_IRQ:
/*
* This isn't really an error interrupt. We're just
* here because we have to do something with them.
* This is probably wrong, and this code will be
* removed.
*/
intpend_val = LOCAL_HUB_L(PI_INT_PEND0);
if ( (bit = ~(1L<<GFX_INTR_A)) ==
(intpend_val & ~(1L<<GFX_INTR_A)) ) {
LOCAL_HUB_CLR_INTR(bit);
return;
}
if ( (bit = ~(1L<<GFX_INTR_B)) ==
(intpend_val & ~(1L<<GFX_INTR_B)) ) {
LOCAL_HUB_CLR_INTR(bit);
return;
}
if ( (bit = ~(1L<<PG_MIG_INTR)) ==
(intpend_val & ~(1L<<PG_MIG_INTR)) ) {
LOCAL_HUB_CLR_INTR(bit);
return;
}
if ( (bit = ~(1L<<UART_INTR)) ==
(intpend_val & ~(1L<<UART_INTR)) ) {
LOCAL_HUB_CLR_INTR(bit);
return;
}
if ( (bit = ~(1L<<CC_PEND_A)) ==
(intpend_val & ~(1L<<CC_PEND_A)) ) {
LOCAL_HUB_CLR_INTR(bit);
return;
}
if ( (bit = ~(1L<<CC_PEND_B)) ==
(intpend_val & ~(1L<<CC_PEND_B)) ) {
LOCAL_HUB_CLR_INTR(bit);
return;
}
printk("Received SGI_UART_IRQ (65), but no intpend0 bits were set???\n");
return;
case SGI_HUB_ERROR_IRQ:
/*
* These are mostly error interrupts of various
* sorts. We need to do more than panic here, but
* what the heck, this is bring up.
*/
intpend_val = LOCAL_HUB_L(PI_INT_PEND1);
if ( (bit = ~(1L<<XB_ERROR)) ==
(intpend_val & ~(1L<<XB_ERROR)) ) {
LOCAL_HUB_CLR_INTR(bit);
panic("RECEIVED XB_ERROR on cpu %d, cnode %d\n",
smp_processor_id(),
cpuid_to_cnodeid(smp_processor_id()));
}
if ( (bit = ~(1L<<LB_ERROR)) ==
(intpend_val & ~(1L<<LB_ERROR)) ) {
LOCAL_HUB_CLR_INTR(bit);
panic("RECEIVED LB_ERROR on cpu %d, cnode %d\n",
smp_processor_id(),
cpuid_to_cnodeid(smp_processor_id()));
}
if ( (bit = ~(1L<<NACK_INT_A)) ==
(intpend_val & ~(1L<<NACK_INT_A)) ) {
LOCAL_HUB_CLR_INTR(bit);
panic("RECEIVED NACK_INT_A on cpu %d, cnode %d\n",
smp_processor_id(),
cpuid_to_cnodeid(smp_processor_id()));
}
if ( (bit = ~(1L<<NACK_INT_B)) ==
(intpend_val & ~(1L<<NACK_INT_B)) ) {
LOCAL_HUB_CLR_INTR(bit);
panic("RECEIVED NACK_INT_B on cpu %d, cnode %d\n",
smp_processor_id(),
cpuid_to_cnodeid(smp_processor_id()));
}
if ( (bit = ~(1L<<CLK_ERR_INTR)) ==
(intpend_val & ~(1L<<CLK_ERR_INTR)) ) {
LOCAL_HUB_CLR_INTR(bit);
panic("RECEIVED CLK_ERR_INTR on cpu %d, cnode %d\n",
smp_processor_id(),
cpuid_to_cnodeid(smp_processor_id()));
}
if ( (bit = ~(1L<<COR_ERR_INTR_A)) ==
(intpend_val & ~(1L<<COR_ERR_INTR_A)) ) {
LOCAL_HUB_CLR_INTR(bit);
panic("RECEIVED COR_ERR_INTR_A on cpu %d, cnode %d\n",
smp_processor_id(),
cpuid_to_cnodeid(smp_processor_id()));
}
if ( (bit = ~(1L<<COR_ERR_INTR_B)) ==
(intpend_val & ~(1L<<COR_ERR_INTR_B)) ) {
LOCAL_HUB_CLR_INTR(bit);
panic("RECEIVED COR_ERR_INTR_B on cpu %d, cnode %d\n",
smp_processor_id(),
cpuid_to_cnodeid(smp_processor_id()));
}
if ( (bit = ~(1L<<MD_COR_ERR_INTR)) ==
(intpend_val & ~(1L<<MD_COR_ERR_INTR)) ) {
LOCAL_HUB_CLR_INTR(bit);
panic("RECEIVED MD_COR_ERR_INTR on cpu %d, cnode %d\n",
smp_processor_id(),
cpuid_to_cnodeid(smp_processor_id()));
}
if ( (bit = ~(1L<<NI_ERROR_INTR)) ==
(intpend_val & ~(1L<<NI_ERROR_INTR)) ) {
LOCAL_HUB_CLR_INTR(bit);
panic("RECEIVED NI_ERROR_INTR on cpu %d, cnode %d\n",
smp_processor_id(),
cpuid_to_cnodeid(smp_processor_id()));
}
if ( (bit = ~(1L<<MSC_PANIC_INTR)) ==
(intpend_val & ~(1L<<MSC_PANIC_INTR)) ) {
LOCAL_HUB_CLR_INTR(bit);
panic("RECEIVED MSC_PANIC_INTR on cpu %d, cnode %d\n",
smp_processor_id(),
cpuid_to_cnodeid(smp_processor_id()));
}
printk("Received SGI_XB_ERROR_IRQ (182) but no intpend1 bits are set???\n");
return;
default:
printk("Received invalid irq in snia_error_intr_handler()\n");
}
}
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