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 (*((uint32_t *)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)
{
    uint32_t 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 1769	Rev 1780
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",	51	"Interrupt",
52	"TLB Modified",	52	"TLB Modified",
53	"TLB Invalid",	53	"TLB Invalid",
54	"TLB Invalid Store",	54	"TLB Invalid Store",
55	"Address Error - load/instr. fetch",	55	"Address Error - load/instr. fetch",
56	"Address Error - store",	56	"Address Error - store",
57	"Bus Error - fetch instruction",	57	"Bus Error - fetch instruction",
58	"Bus Error - data reference",	58	"Bus Error - data reference",
59	"Syscall",	59	"Syscall",
60	"BreakPoint",	60	"BreakPoint",
61	"Reserved Instruction",	61	"Reserved Instruction",
62	"Coprocessor Unusable",	62	"Coprocessor Unusable",
63	"Arithmetic Overflow",	63	"Arithmetic Overflow",
64	"Trap",	64	"Trap",
65	"Virtual Coherency - instruction",	65	"Virtual Coherency - instruction",
66	"Floating Point",	66	"Floating Point",
67	NULL, NULL, NULL, NULL, NULL, NULL, NULL,	67	NULL, NULL, NULL, NULL, NULL, NULL, NULL,
68	"WatchHi/WatchLo", /* 23 */	68	"WatchHi/WatchLo", /* 23 */
69	NULL, NULL, NULL, NULL, NULL, NULL, NULL,	69	NULL, NULL, NULL, NULL, NULL, NULL, NULL,
70	"Virtual Coherency - data",	70	"Virtual Coherency - data",
71	};	71	};
72		72
73	static void print_regdump(istate_t *istate)	73	static void print_regdump(istate_t *istate)
74	{	74	{
75	char *pcsymbol = "";	75	char *pcsymbol = "";
76	char *rasymbol = "";	76	char *rasymbol = "";
77		77
78	char *s = get_symtab_entry(istate->epc);	78	char *s = get_symtab_entry(istate->epc);
79	if (s)	79	if (s)
80	pcsymbol = s;	80	pcsymbol = s;
81	s = get_symtab_entry(istate->ra);	81	s = get_symtab_entry(istate->ra);
82	if (s)	82	if (s)
83	rasymbol = s;	83	rasymbol = s;
84		84
85	printf("PC: %#x(%s) RA: %#x(%s), SP(%p)\n", istate->epc, pcsymbol, istate->ra, rasymbol, istate->sp);	85	printf("PC: %#x(%s) RA: %#x(%s), SP(%p)\n", istate->epc, pcsymbol, istate->ra, rasymbol, istate->sp);
86	}	86	}
87		87
88	static void unhandled_exception(int n, istate_t *istate)	88	static void unhandled_exception(int n, istate_t *istate)
89	{	89	{
90	fault_if_from_uspace(istate, "unhandled exception %s", exctable[n]);	90	fault_if_from_uspace(istate, "unhandled exception %s", exctable[n]);
91		91
92	print_regdump(istate);	92	print_regdump(istate);
93	panic("unhandled exception %s\n", exctable[n]);	93	panic("unhandled exception %s\n", exctable[n]);
94	}	94	}
95		95
96	static void reserved_instr_exception(int n, istate_t *istate)	96	static void reserved_instr_exception(int n, istate_t *istate)
97	{	97	{
98	if (((__u32 )istate->epc) == 0x7c03e83b) {	98	if (((uint32_t )istate->epc) == 0x7c03e83b) {
99	ASSERT(THREAD);	99	ASSERT(THREAD);
100	istate->epc += 4;	100	istate->epc += 4;
101	istate->v1 = istate->k1;	101	istate->v1 = istate->k1;
102	} else	102	} else
103	unhandled_exception(n, istate);	103	unhandled_exception(n, istate);
104	}	104	}
105		105
106	static void breakpoint_exception(int n, istate_t *istate)	106	static void breakpoint_exception(int n, istate_t *istate)
107	{	107	{
108	#ifdef CONFIG_DEBUG	108	#ifdef CONFIG_DEBUG
109	debugger_bpoint(istate);	109	debugger_bpoint(istate);
110	#else	110	#else
111	/* it is necessary to not re-execute BREAK instruction after	111	/* it is necessary to not re-execute BREAK instruction after
112	returning from Exception handler	112	returning from Exception handler
113	(see page 138 in R4000 Manual for more information) */	113	(see page 138 in R4000 Manual for more information) */
114	istate->epc += 4;	114	istate->epc += 4;
115	#endif	115	#endif
116	}	116	}
117		117
118	static void tlbmod_exception(int n, istate_t *istate)	118	static void tlbmod_exception(int n, istate_t *istate)
119	{	119	{
120	tlb_modified(istate);	120	tlb_modified(istate);
121	}	121	}
122		122
123	static void tlbinv_exception(int n, istate_t *istate)	123	static void tlbinv_exception(int n, istate_t *istate)
124	{	124	{
125	tlb_invalid(istate);	125	tlb_invalid(istate);
126	}	126	}
127		127
128	#ifdef CONFIG_FPU_LAZY	128	#ifdef CONFIG_FPU_LAZY
129	static void cpuns_exception(int n, istate_t *istate)	129	static void cpuns_exception(int n, istate_t *istate)
130	{	130	{
131	if (cp0_cause_coperr(cp0_cause_read()) == fpu_cop_id)	131	if (cp0_cause_coperr(cp0_cause_read()) == fpu_cop_id)
132	scheduler_fpu_lazy_request();	132	scheduler_fpu_lazy_request();
133	else {	133	else {
134	fault_if_from_uspace(istate, "unhandled Coprocessor Unusable Exception");	134	fault_if_from_uspace(istate, "unhandled Coprocessor Unusable Exception");
135	panic("unhandled Coprocessor Unusable Exception\n");	135	panic("unhandled Coprocessor Unusable Exception\n");
136	}	136	}
137	}	137	}
138	#endif	138	#endif
139		139
140	static void interrupt_exception(int n, istate_t *istate)	140	static void interrupt_exception(int n, istate_t *istate)
141	{	141	{
142	__u32 cause;	142	uint32_t cause;
143	int i;	143	int i;
144		144
145	/* decode interrupt number and process the interrupt */	145	/* decode interrupt number and process the interrupt */
146	cause = (cp0_cause_read() >> 8) &0xff;	146	cause = (cp0_cause_read() >> 8) &0xff;
147		147
148	for (i = 0; i < 8; i++)	148	for (i = 0; i < 8; i++)
149	if (cause & (1 << i))	149	if (cause & (1 << i))
150	exc_dispatch(i+INT_OFFSET, istate);	150	exc_dispatch(i+INT_OFFSET, istate);
151	}	151	}
152		152
153	/** Handle syscall userspace call */	153	/** Handle syscall userspace call */
154	static void syscall_exception(int n, istate_t *istate)	154	static void syscall_exception(int n, istate_t *istate)
155	{	155	{
156	panic("Syscall is handled through shortcut");	156	panic("Syscall is handled through shortcut");
157	}	157	}
158		158
159	void exception_init(void)	159	void exception_init(void)
160	{	160	{
161	int i;	161	int i;
162		162
163	/* Clear exception table */	163	/* Clear exception table */
164	for (i=0;i < IVT_ITEMS; i++)	164	for (i=0;i < IVT_ITEMS; i++)
165	exc_register(i, "undef", (iroutine) unhandled_exception);	165	exc_register(i, "undef", (iroutine) unhandled_exception);
166	exc_register(EXC_Bp, "bkpoint", (iroutine) breakpoint_exception);	166	exc_register(EXC_Bp, "bkpoint", (iroutine) breakpoint_exception);
167	exc_register(EXC_RI, "resinstr", (iroutine) reserved_instr_exception);	167	exc_register(EXC_RI, "resinstr", (iroutine) reserved_instr_exception);
168	exc_register(EXC_Mod, "tlb_mod", (iroutine) tlbmod_exception);	168	exc_register(EXC_Mod, "tlb_mod", (iroutine) tlbmod_exception);
169	exc_register(EXC_TLBL, "tlbinvl", (iroutine) tlbinv_exception);	169	exc_register(EXC_TLBL, "tlbinvl", (iroutine) tlbinv_exception);
170	exc_register(EXC_TLBS, "tlbinvl", (iroutine) tlbinv_exception);	170	exc_register(EXC_TLBS, "tlbinvl", (iroutine) tlbinv_exception);
171	exc_register(EXC_Int, "interrupt", (iroutine) interrupt_exception);	171	exc_register(EXC_Int, "interrupt", (iroutine) interrupt_exception);
172	#ifdef CONFIG_FPU_LAZY	172	#ifdef CONFIG_FPU_LAZY
173	exc_register(EXC_CpU, "cpunus", (iroutine) cpuns_exception);	173	exc_register(EXC_CpU, "cpunus", (iroutine) cpuns_exception);
174	#endif	174	#endif
175	exc_register(EXC_Sys, "syscall", (iroutine) syscall_exception);	175	exc_register(EXC_Sys, "syscall", (iroutine) syscall_exception);
176	}	176	}
177		177
178	/** @}	178	/** @}
179	*/	179	*/
180		180

Subversion Repositories HelenOS-historic

(root)/kernel/trunk/arch/mips32/src/exception.c – Rev 1769 → 1780