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.
 */
 
#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)
{
    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
        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 1196	Rev 1221
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	#include <arch/exception.h>	29	#include <arch/exception.h>
30	#include <arch/interrupt.h>	30	#include <arch/interrupt.h>
31	#include <panic.h>	31	#include <panic.h>
32	#include <arch/cp0.h>	32	#include <arch/cp0.h>
33	#include <arch/types.h>	33	#include <arch/types.h>
34	#include <arch.h>	34	#include <arch.h>
35	#include <debug.h>	35	#include <debug.h>
36	#include <proc/thread.h>	36	#include <proc/thread.h>
37	#include <symtab.h>	37	#include <symtab.h>
38	#include <print.h>	38	#include <print.h>
39	#include <interrupt.h>	39	#include <interrupt.h>
40	#include <func.h>	40	#include <func.h>
41	#include <console/kconsole.h>	41	#include <console/kconsole.h>
42	#include <arch/debugger.h>	42	#include <arch/debugger.h>
43		43
44	static char * exctable[] = {	44	static char * exctable[] = {
45	"Interrupt","TLB Modified","TLB Invalid","TLB Invalid Store",	45	"Interrupt","TLB Modified","TLB Invalid","TLB Invalid Store",
46	"Address Error - load/instr. fetch",	46	"Address Error - load/instr. fetch",
47	"Address Error - store",	47	"Address Error - store",
48	"Bus Error - fetch instruction",	48	"Bus Error - fetch instruction",
49	"Bus Error - data reference",	49	"Bus Error - data reference",
50	"Syscall",	50	"Syscall",
51	"BreakPoint",	51	"BreakPoint",
52	"Reserved Instruction",	52	"Reserved Instruction",
53	"Coprocessor Unusable",	53	"Coprocessor Unusable",
54	"Arithmetic Overflow",	54	"Arithmetic Overflow",
55	"Trap",	55	"Trap",
56	"Virtual Coherency - instruction",	56	"Virtual Coherency - instruction",
57	"Floating Point",	57	"Floating Point",
58	NULL, NULL, NULL, NULL, NULL, NULL, NULL,	58	NULL, NULL, NULL, NULL, NULL, NULL, NULL,
59	"WatchHi/WatchLo", /* 23 */	59	"WatchHi/WatchLo", /* 23 */
60	NULL, NULL, NULL, NULL, NULL, NULL, NULL,	60	NULL, NULL, NULL, NULL, NULL, NULL, NULL,
61	"Virtual Coherency - data",	61	"Virtual Coherency - data",
62	};	62	};
63		63
64	static void print_regdump(istate_t *istate)	64	static void print_regdump(istate_t *istate)
65	{	65	{
66	char *pcsymbol = "";	66	char *pcsymbol = "";
67	char *rasymbol = "";	67	char *rasymbol = "";
68		68
69	char *s = get_symtab_entry(istate->epc);	69	char *s = get_symtab_entry(istate->epc);
70	if (s)	70	if (s)
71	pcsymbol = s;	71	pcsymbol = s;
72	s = get_symtab_entry(istate->ra);	72	s = get_symtab_entry(istate->ra);
73	if (s)	73	if (s)
74	rasymbol = s;	74	rasymbol = s;
75		75
76	printf("PC: %#X(%s) RA: %#X(%s), SP(%P)\n",istate->epc,pcsymbol,	76	printf("PC: %#x(%s) RA: %#x(%s), SP(%p)\n", istate->epc, pcsymbol, istate->ra, rasymbol, istate->sp);
77	istate->ra,rasymbol, istate->sp);	-
78	}	77	}
79		78
80	static void unhandled_exception(int n, istate_t *istate)	79	static void unhandled_exception(int n, istate_t *istate)
81	{	80	{
82	print_regdump(istate);	81	print_regdump(istate);
83	panic("unhandled exception %s\n", exctable[n]);	82	panic("unhandled exception %s\n", exctable[n]);
84	}	83	}
85		84
86	static void reserved_instr_exception(int n, istate_t *istate)	85	static void reserved_instr_exception(int n, istate_t *istate)
87	{	86	{
88	if (((__u32 )istate->epc) == 0x7c03e83b) {	87	if (((__u32 )istate->epc) == 0x7c03e83b) {
89	ASSERT(THREAD);	88	ASSERT(THREAD);
90	istate->epc += 4;	89	istate->epc += 4;
91	istate->v1 = istate->k1;	90	istate->v1 = istate->k1;
92	} else	91	} else
93	unhandled_exception(n, istate);	92	unhandled_exception(n, istate);
94	}	93	}
95		94
96	static void breakpoint_exception(int n, istate_t *istate)	95	static void breakpoint_exception(int n, istate_t *istate)
97	{	96	{
98	#ifdef CONFIG_DEBUG	97	#ifdef CONFIG_DEBUG
99	debugger_bpoint(istate);	98	debugger_bpoint(istate);
100	#else	99	#else
101	/* it is necessary to not re-execute BREAK instruction after	100	/* it is necessary to not re-execute BREAK instruction after
102	returning from Exception handler	101	returning from Exception handler
103	(see page 138 in R4000 Manual for more information) */	102	(see page 138 in R4000 Manual for more information) */
104	istate->epc += 4;	103	istate->epc += 4;
105	#endif	104	#endif
106	}	105	}
107		106
108	static void tlbmod_exception(int n, istate_t *istate)	107	static void tlbmod_exception(int n, istate_t *istate)
109	{	108	{
110	tlb_modified(istate);	109	tlb_modified(istate);
111	}	110	}
112		111
113	static void tlbinv_exception(int n, istate_t *istate)	112	static void tlbinv_exception(int n, istate_t *istate)
114	{	113	{
115	tlb_invalid(istate);	114	tlb_invalid(istate);
116	}	115	}
117		116
118	#ifdef CONFIG_FPU_LAZY	117	#ifdef CONFIG_FPU_LAZY
119	static void cpuns_exception(int n, istate_t *istate)	118	static void cpuns_exception(int n, istate_t *istate)
120	{	119	{
121	if (cp0_cause_coperr(cp0_cause_read()) == fpu_cop_id)	120	if (cp0_cause_coperr(cp0_cause_read()) == fpu_cop_id)
122	scheduler_fpu_lazy_request();	121	scheduler_fpu_lazy_request();
123	else	122	else
124	panic("unhandled Coprocessor Unusable Exception\n");	123	panic("unhandled Coprocessor Unusable Exception\n");
125	}	124	}
126	#endif	125	#endif
127		126
128	static void interrupt_exception(int n, istate_t *istate)	127	static void interrupt_exception(int n, istate_t *istate)
129	{	128	{
130	__u32 cause;	129	__u32 cause;
131	int i;	130	int i;
132		131
133	/* decode interrupt number and process the interrupt */	132	/* decode interrupt number and process the interrupt */
134	cause = (cp0_cause_read() >> 8) &0xff;	133	cause = (cp0_cause_read() >> 8) &0xff;
135		134
136	for (i = 0; i < 8; i++)	135	for (i = 0; i < 8; i++)
137	if (cause & (1 << i))	136	if (cause & (1 << i))
138	exc_dispatch(i+INT_OFFSET, istate);	137	exc_dispatch(i+INT_OFFSET, istate);
139	}	138	}
140		139
141	/** Handle syscall userspace call */	140	/** Handle syscall userspace call */
142	static void syscall_exception(int n, istate_t *istate)	141	static void syscall_exception(int n, istate_t *istate)
143	{	142	{
144	panic("Syscall is handled through shortcut");	143	panic("Syscall is handled through shortcut");
145	}	144	}
146		145
147	void exception_init(void)	146	void exception_init(void)
148	{	147	{
149	int i;	148	int i;
150		149
151	/* Clear exception table */	150	/* Clear exception table */
152	for (i=0;i < IVT_ITEMS; i++)	151	for (i=0;i < IVT_ITEMS; i++)
153	exc_register(i, "undef", (iroutine) unhandled_exception);	152	exc_register(i, "undef", (iroutine) unhandled_exception);
154	exc_register(EXC_Bp, "bkpoint", (iroutine) breakpoint_exception);	153	exc_register(EXC_Bp, "bkpoint", (iroutine) breakpoint_exception);
155	exc_register(EXC_RI, "resinstr", (iroutine) reserved_instr_exception);	154	exc_register(EXC_RI, "resinstr", (iroutine) reserved_instr_exception);
156	exc_register(EXC_Mod, "tlb_mod", (iroutine) tlbmod_exception);	155	exc_register(EXC_Mod, "tlb_mod", (iroutine) tlbmod_exception);
157	exc_register(EXC_TLBL, "tlbinvl", (iroutine) tlbinv_exception);	156	exc_register(EXC_TLBL, "tlbinvl", (iroutine) tlbinv_exception);
158	exc_register(EXC_TLBS, "tlbinvl", (iroutine) tlbinv_exception);	157	exc_register(EXC_TLBS, "tlbinvl", (iroutine) tlbinv_exception);
159	exc_register(EXC_Int, "interrupt", (iroutine) interrupt_exception);	158	exc_register(EXC_Int, "interrupt", (iroutine) interrupt_exception);
160	#ifdef CONFIG_FPU_LAZY	159	#ifdef CONFIG_FPU_LAZY
161	exc_register(EXC_CpU, "cpunus", (iroutine) cpuns_exception);	160	exc_register(EXC_CpU, "cpunus", (iroutine) cpuns_exception);
162	#endif	161	#endif
163	exc_register(EXC_Sys, "syscall", (iroutine) syscall_exception);	162	exc_register(EXC_Sys, "syscall", (iroutine) syscall_exception);
164	}	163	}
165		164

Subversion Repositories HelenOS-historic

(root)/kernel/trunk/arch/mips32/src/exception.c @ 1595 – Rev 1196 → 1221