01b9f4b0ed
Since the hardware only provides reporting for the last exception handled, and the values are valid only when executing the exception handler, we need to save the context for reporting at a later point. While we do this for one exception, it doesn't work properly when handling a second one as the original exception is clobbered by the double fault. So when double fault debugging is enabled, create a dedicated shadow of these values and save/restore out of there. Now the crash report properly displays the first exception as well as the second one. Signed-off-by: Graf Yang <graf.yang@analog.com> Signed-off-by: Mike Frysinger <vapier@gentoo.org>
76 lines
2.4 KiB
C
76 lines
2.4 KiB
C
/*
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* File: arch/blackfin/include/asm/pda.h
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* Author: Philippe Gerum <rpm@xenomai.org>
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*
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* Copyright 2007 Analog Devices Inc.
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, see the file COPYING, or write
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* to the Free Software Foundation, Inc.,
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* 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
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*/
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#ifndef _ASM_BLACKFIN_PDA_H
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#define _ASM_BLACKFIN_PDA_H
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#include <mach/anomaly.h>
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#ifndef __ASSEMBLY__
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struct blackfin_pda { /* Per-processor Data Area */
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struct blackfin_pda *next;
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unsigned long syscfg;
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#ifdef CONFIG_SMP
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unsigned long imask; /* Current IMASK value */
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#endif
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unsigned long *ipdt; /* Start of switchable I-CPLB table */
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unsigned long *ipdt_swapcount; /* Number of swaps in ipdt */
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unsigned long *dpdt; /* Start of switchable D-CPLB table */
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unsigned long *dpdt_swapcount; /* Number of swaps in dpdt */
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/*
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* Single instructions can have multiple faults, which
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* need to be handled by traps.c, in irq5. We store
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* the exception cause to ensure we don't miss a
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* double fault condition
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*/
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unsigned long ex_iptr;
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unsigned long ex_optr;
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unsigned long ex_buf[4];
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unsigned long ex_imask; /* Saved imask from exception */
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unsigned long ex_ipend; /* Saved IPEND from exception */
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unsigned long *ex_stack; /* Exception stack space */
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#ifdef ANOMALY_05000261
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unsigned long last_cplb_fault_retx;
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#endif
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unsigned long dcplb_fault_addr;
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unsigned long icplb_fault_addr;
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unsigned long retx;
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unsigned long seqstat;
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unsigned int __nmi_count; /* number of times NMI asserted on this CPU */
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#ifdef CONFIG_DEBUG_DOUBLEFAULT
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unsigned long dcplb_doublefault_addr;
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unsigned long icplb_doublefault_addr;
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unsigned long retx_doublefault;
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unsigned long seqstat_doublefault;
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#endif
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};
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extern struct blackfin_pda cpu_pda[];
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#endif /* __ASSEMBLY__ */
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#endif /* _ASM_BLACKFIN_PDA_H */
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