WebSVN – HelenOS-historic – Diff – /kernel/trunk/arch/mips32/src/exception.c


/*
 * Copyright (C) 2003-2004 Jakub Jermar
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 *
 * - Redistributions of source code must retain the above copyright
 *   notice, this list of conditions and the following disclaimer.
 * - Redistributions in binary form must reproduce the above copyright
 *   notice, this list of conditions and the following disclaimer in the
 *   documentation and/or other materials provided with the distribution.
 * - The name of the author may not be used to endorse or promote products
 *   derived from this software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */
 
/** @addtogroup mips32 
 * @{
 */
/** @file
 */
 
#include <arch/exception.h>
#include <arch/interrupt.h>
#include <panic.h>
#include <arch/cp0.h>
#include <arch/types.h>
#include <arch.h>
#include <debug.h>
#include <proc/thread.h>
#include <symtab.h>
#include <print.h>
#include <interrupt.h>
#include <func.h>
#include <console/kconsole.h>
#include <arch/debugger.h>
 
static char * exctable[] = {
    "Interrupt","TLB Modified","TLB Invalid","TLB Invalid Store",
        "Address Error - load/instr. fetch",
        "Address Error - store",
        "Bus Error - fetch instruction",
        "Bus Error - data reference",
        "Syscall",
        "BreakPoint",
        "Reserved Instruction",
        "Coprocessor Unusable",
        "Arithmetic Overflow",
        "Trap",
        "Virtual Coherency - instruction",
        "Floating Point",
        NULL, NULL, NULL, NULL, NULL, NULL, NULL,
        "WatchHi/WatchLo", /* 23 */
        NULL, NULL, NULL, NULL, NULL, NULL, NULL,
        "Virtual Coherency - data",
};
 
static void print_regdump(istate_t *istate)
{
    char *pcsymbol = "";
    char *rasymbol = "";
 
    char *s = get_symtab_entry(istate->epc);
    if (s)
        pcsymbol = s;
    s = get_symtab_entry(istate->ra);
    if (s)
        rasymbol = s;
   
    printf("PC: %#x(%s) RA: %#x(%s), SP(%p)\n", istate->epc, pcsymbol, istate->ra, rasymbol, istate->sp);
}
 
static void unhandled_exception(int n, istate_t *istate)
{
    fault_if_from_uspace(istate, "unhandled exception %s", exctable[n]);
   
    print_regdump(istate);
    panic("unhandled exception %s\n", exctable[n]);
}
 
static void reserved_instr_exception(int n, istate_t *istate)
{
    if (*((__u32 *)istate->epc) == 0x7c03e83b) {
        ASSERT(THREAD);
        istate->epc += 4;
        istate->v1 = istate->k1;
    } else
        unhandled_exception(n, istate);
}
 
static void breakpoint_exception(int n, istate_t *istate)
{
#ifdef CONFIG_DEBUG
    debugger_bpoint(istate);
#else
    /* it is necessary to not re-execute BREAK instruction after
       returning from Exception handler
       (see page 138 in R4000 Manual for more information) */
    istate->epc += 4;
#endif
}
 
static void tlbmod_exception(int n, istate_t *istate)
{
    tlb_modified(istate);
}
 
static void tlbinv_exception(int n, istate_t *istate)
{
    tlb_invalid(istate);
}
 
#ifdef CONFIG_FPU_LAZY
static void cpuns_exception(int n, istate_t *istate)
{
    if (cp0_cause_coperr(cp0_cause_read()) == fpu_cop_id)
        scheduler_fpu_lazy_request();
    else {
        fault_if_from_uspace(istate, "unhandled Coprocessor Unusable Exception");
        panic("unhandled Coprocessor Unusable Exception\n");
    }
}
#endif
 
static void interrupt_exception(int n, istate_t *istate)
{
    __u32 cause;
    int i;
   
    /* decode interrupt number and process the interrupt */
    cause = (cp0_cause_read() >> 8) &0xff;
   
    for (i = 0; i < 8; i++)
        if (cause & (1 << i))
            exc_dispatch(i+INT_OFFSET, istate);
}
 
/** Handle syscall userspace call */
static void syscall_exception(int n, istate_t *istate)
{
    panic("Syscall is handled through shortcut");
}
 
void exception_init(void)
{
    int i;
 
    /* Clear exception table */
    for (i=0;i < IVT_ITEMS; i++)
        exc_register(i, "undef", (iroutine) unhandled_exception);
    exc_register(EXC_Bp, "bkpoint", (iroutine) breakpoint_exception);
    exc_register(EXC_RI, "resinstr", (iroutine) reserved_instr_exception);
    exc_register(EXC_Mod, "tlb_mod", (iroutine) tlbmod_exception);
    exc_register(EXC_TLBL, "tlbinvl", (iroutine) tlbinv_exception);
    exc_register(EXC_TLBS, "tlbinvl", (iroutine) tlbinv_exception);
    exc_register(EXC_Int, "interrupt", (iroutine) interrupt_exception);
#ifdef CONFIG_FPU_LAZY
    exc_register(EXC_CpU, "cpunus", (iroutine) cpuns_exception);
#endif
    exc_register(EXC_Sys, "syscall", (iroutine) syscall_exception);
}
 
/** @}
 */
 
 

Rev 1702	Rev 1754
1	/*	1	/*
2	* Copyright (C) 2003-2004 Jakub Jermar	2	* Copyright (C) 2003-2004 Jakub Jermar
3	* All rights reserved.	3	* All rights reserved.
4	*	4	*
5	* Redistribution and use in source and binary forms, with or without	5	* Redistribution and use in source and binary forms, with or without
6	* modification, are permitted provided that the following conditions	6	* modification, are permitted provided that the following conditions
7	* are met:	7	* are met:
8	*	8	*
9	* - Redistributions of source code must retain the above copyright	9	* - Redistributions of source code must retain the above copyright
10	* notice, this list of conditions and the following disclaimer.	10	* notice, this list of conditions and the following disclaimer.
11	* - Redistributions in binary form must reproduce the above copyright	11	* - Redistributions in binary form must reproduce the above copyright
12	* notice, this list of conditions and the following disclaimer in the	12	* notice, this list of conditions and the following disclaimer in the
13	* documentation and/or other materials provided with the distribution.	13	* documentation and/or other materials provided with the distribution.
14	* - The name of the author may not be used to endorse or promote products	14	* - The name of the author may not be used to endorse or promote products
15	* derived from this software without specific prior written permission.	15	* derived from this software without specific prior written permission.
16	*	16	*
17	* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR	17	* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
18	* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES	18	* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
19	* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.	19	* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
20	* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,	20	* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
21	* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT	21	* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
22	* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,	22	* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
23	* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY	23	* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
24	* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT	24	* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
25	* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF	25	* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
26	* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.	26	* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
27	*/	27	*/
28		28
29	/** @addtogroup mips32	29	/** @addtogroup mips32
30	* @{	30	* @{
31	*/	31	*/
32	/** @file	32	/** @file
33	*/	33	*/
34		34
35	#include <arch/exception.h>	35	#include <arch/exception.h>
36	#include <arch/interrupt.h>	36	#include <arch/interrupt.h>
37	#include <panic.h>	37	#include <panic.h>
38	#include <arch/cp0.h>	38	#include <arch/cp0.h>
39	#include <arch/types.h>	39	#include <arch/types.h>
40	#include <arch.h>	40	#include <arch.h>
41	#include <debug.h>	41	#include <debug.h>
42	#include <proc/thread.h>	42	#include <proc/thread.h>
43	#include <symtab.h>	43	#include <symtab.h>
44	#include <print.h>	44	#include <print.h>
45	#include <interrupt.h>	45	#include <interrupt.h>
46	#include <func.h>	46	#include <func.h>
47	#include <console/kconsole.h>	47	#include <console/kconsole.h>
48	#include <arch/debugger.h>	48	#include <arch/debugger.h>
49		49
50	static char * exctable[] = {	50	static char * exctable[] = {
51	"Interrupt","TLB Modified","TLB Invalid","TLB Invalid Store",	51	"Interrupt","TLB Modified","TLB Invalid","TLB Invalid Store",
52	"Address Error - load/instr. fetch",	52	"Address Error - load/instr. fetch",
53	"Address Error - store",	53	"Address Error - store",
54	"Bus Error - fetch instruction",	54	"Bus Error - fetch instruction",
55	"Bus Error - data reference",	55	"Bus Error - data reference",
56	"Syscall",	56	"Syscall",
57	"BreakPoint",	57	"BreakPoint",
58	"Reserved Instruction",	58	"Reserved Instruction",
59	"Coprocessor Unusable",	59	"Coprocessor Unusable",
60	"Arithmetic Overflow",	60	"Arithmetic Overflow",
61	"Trap",	61	"Trap",
62	"Virtual Coherency - instruction",	62	"Virtual Coherency - instruction",
63	"Floating Point",	63	"Floating Point",
64	NULL, NULL, NULL, NULL, NULL, NULL, NULL,	64	NULL, NULL, NULL, NULL, NULL, NULL, NULL,
65	"WatchHi/WatchLo", /* 23 */	65	"WatchHi/WatchLo", /* 23 */
66	NULL, NULL, NULL, NULL, NULL, NULL, NULL,	66	NULL, NULL, NULL, NULL, NULL, NULL, NULL,
67	"Virtual Coherency - data",	67	"Virtual Coherency - data",
68	};	68	};
69		69
70	static void print_regdump(istate_t *istate)	70	static void print_regdump(istate_t *istate)
71	{	71	{
72	char *pcsymbol = "";	72	char *pcsymbol = "";
73	char *rasymbol = "";	73	char *rasymbol = "";
74		74
75	char *s = get_symtab_entry(istate->epc);	75	char *s = get_symtab_entry(istate->epc);
76	if (s)	76	if (s)
77	pcsymbol = s;	77	pcsymbol = s;
78	s = get_symtab_entry(istate->ra);	78	s = get_symtab_entry(istate->ra);
79	if (s)	79	if (s)
80	rasymbol = s;	80	rasymbol = s;
81		81
82	printf("PC: %#x(%s) RA: %#x(%s), SP(%p)\n", istate->epc, pcsymbol, istate->ra, rasymbol, istate->sp);	82	printf("PC: %#x(%s) RA: %#x(%s), SP(%p)\n", istate->epc, pcsymbol, istate->ra, rasymbol, istate->sp);
83	}	83	}
84		84
85	static void unhandled_exception(int n, istate_t *istate)	85	static void unhandled_exception(int n, istate_t *istate)
86	{	86	{
87	fault_if_from_uspace(istate, "unhandled exception %s", exctable[n]);	87	fault_if_from_uspace(istate, "unhandled exception %s", exctable[n]);
88		88
89	print_regdump(istate);	89	print_regdump(istate);
90	panic("unhandled exception %s\n", exctable[n]);	90	panic("unhandled exception %s\n", exctable[n]);
91	}	91	}
92		92
93	static void reserved_instr_exception(int n, istate_t *istate)	93	static void reserved_instr_exception(int n, istate_t *istate)
94	{	94	{
95	if (((__u32 )istate->epc) == 0x7c03e83b) {	95	if (((__u32 )istate->epc) == 0x7c03e83b) {
96	ASSERT(THREAD);	96	ASSERT(THREAD);
97	istate->epc += 4;	97	istate->epc += 4;
98	istate->v1 = istate->k1;	98	istate->v1 = istate->k1;
99	} else	99	} else
100	unhandled_exception(n, istate);	100	unhandled_exception(n, istate);
101	}	101	}
102		102
103	static void breakpoint_exception(int n, istate_t *istate)	103	static void breakpoint_exception(int n, istate_t *istate)
104	{	104	{
105	#ifdef CONFIG_DEBUG	105	#ifdef CONFIG_DEBUG
106	debugger_bpoint(istate);	106	debugger_bpoint(istate);
107	#else	107	#else
108	/* it is necessary to not re-execute BREAK instruction after	108	/* it is necessary to not re-execute BREAK instruction after
109	returning from Exception handler	109	returning from Exception handler
110	(see page 138 in R4000 Manual for more information) */	110	(see page 138 in R4000 Manual for more information) */
111	istate->epc += 4;	111	istate->epc += 4;
112	#endif	112	#endif
113	}	113	}
114		114
115	static void tlbmod_exception(int n, istate_t *istate)	115	static void tlbmod_exception(int n, istate_t *istate)
116	{	116	{
117	tlb_modified(istate);	117	tlb_modified(istate);
118	}	118	}
119		119
120	static void tlbinv_exception(int n, istate_t *istate)	120	static void tlbinv_exception(int n, istate_t *istate)
121	{	121	{
122	tlb_invalid(istate);	122	tlb_invalid(istate);
123	}	123	}
124		124
125	#ifdef CONFIG_FPU_LAZY	125	#ifdef CONFIG_FPU_LAZY
126	static void cpuns_exception(int n, istate_t *istate)	126	static void cpuns_exception(int n, istate_t *istate)
127	{	127	{
128	if (cp0_cause_coperr(cp0_cause_read()) == fpu_cop_id)	128	if (cp0_cause_coperr(cp0_cause_read()) == fpu_cop_id)
129	scheduler_fpu_lazy_request();	129	scheduler_fpu_lazy_request();
130	else {	130	else {
131	fault_if_from_uspace(istate, "unhandled Coprocessor Unusable Exception");	131	fault_if_from_uspace(istate, "unhandled Coprocessor Unusable Exception");
132	panic("unhandled Coprocessor Unusable Exception\n");	132	panic("unhandled Coprocessor Unusable Exception\n");
133	}	133	}
134	}	134	}
135	#endif	135	#endif
136		136
137	static void interrupt_exception(int n, istate_t *istate)	137	static void interrupt_exception(int n, istate_t *istate)
138	{	138	{
139	__u32 cause;	139	__u32 cause;
140	int i;	140	int i;
141		141
142	/* decode interrupt number and process the interrupt */	142	/* decode interrupt number and process the interrupt */
143	cause = (cp0_cause_read() >> 8) &0xff;	143	cause = (cp0_cause_read() >> 8) &0xff;
144		144
145	for (i = 0; i < 8; i++)	145	for (i = 0; i < 8; i++)
146	if (cause & (1 << i))	146	if (cause & (1 << i))
147	exc_dispatch(i+INT_OFFSET, istate);	147	exc_dispatch(i+INT_OFFSET, istate);
148	}	148	}
149		149
150	/** Handle syscall userspace call */	150	/** Handle syscall userspace call */
151	static void syscall_exception(int n, istate_t *istate)	151	static void syscall_exception(int n, istate_t *istate)
152	{	152	{
153	panic("Syscall is handled through shortcut");	153	panic("Syscall is handled through shortcut");
154	}	154	}
155		155
156	void exception_init(void)	156	void exception_init(void)
157	{	157	{
158	int i;	158	int i;
159		159
160	/* Clear exception table */	160	/* Clear exception table */
161	for (i=0;i < IVT_ITEMS; i++)	161	for (i=0;i < IVT_ITEMS; i++)
162	exc_register(i, "undef", (iroutine) unhandled_exception);	162	exc_register(i, "undef", (iroutine) unhandled_exception);
163	exc_register(EXC_Bp, "bkpoint", (iroutine) breakpoint_exception);	163	exc_register(EXC_Bp, "bkpoint", (iroutine) breakpoint_exception);
164	exc_register(EXC_RI, "resinstr", (iroutine) reserved_instr_exception);	164	exc_register(EXC_RI, "resinstr", (iroutine) reserved_instr_exception);
165	exc_register(EXC_Mod, "tlb_mod", (iroutine) tlbmod_exception);	165	exc_register(EXC_Mod, "tlb_mod", (iroutine) tlbmod_exception);
166	exc_register(EXC_TLBL, "tlbinvl", (iroutine) tlbinv_exception);	166	exc_register(EXC_TLBL, "tlbinvl", (iroutine) tlbinv_exception);
167	exc_register(EXC_TLBS, "tlbinvl", (iroutine) tlbinv_exception);	167	exc_register(EXC_TLBS, "tlbinvl", (iroutine) tlbinv_exception);
168	exc_register(EXC_Int, "interrupt", (iroutine) interrupt_exception);	168	exc_register(EXC_Int, "interrupt", (iroutine) interrupt_exception);
169	#ifdef CONFIG_FPU_LAZY	169	#ifdef CONFIG_FPU_LAZY
170	exc_register(EXC_CpU, "cpunus", (iroutine) cpuns_exception);	170	exc_register(EXC_CpU, "cpunus", (iroutine) cpuns_exception);
171	#endif	171	#endif
172	exc_register(EXC_Sys, "syscall", (iroutine) syscall_exception);	172	exc_register(EXC_Sys, "syscall", (iroutine) syscall_exception);
173	}	173	}
174		174
175	/** @}	175	/** @}
176	*/	176	*/
177		177
178		178

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(root)/kernel/trunk/arch/mips32/src/exception.c – Rev 1702 → 1754