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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 |
|
- | 30 | * @{ |
|
- | 31 | */ |
|
- | 32 | /** @file |
|
- | 33 | */ |
|
- | 34 | ||
29 | #include <arch/exception.h> |
35 | #include <arch/exception.h> |
30 | #include <arch/interrupt.h> |
36 | #include <arch/interrupt.h> |
31 | #include <panic.h> |
37 | #include <panic.h> |
32 | #include <arch/cp0.h> |
38 | #include <arch/cp0.h> |
33 | #include <arch/types.h> |
39 | #include <arch/types.h> |
34 | #include <arch.h> |
40 | #include <arch.h> |
35 | #include <debug.h> |
41 | #include <debug.h> |
36 | #include <proc/thread.h> |
42 | #include <proc/thread.h> |
37 | #include <symtab.h> |
43 | #include <symtab.h> |
38 | #include <print.h> |
44 | #include <print.h> |
39 | #include <interrupt.h> |
45 | #include <interrupt.h> |
40 | #include <func.h> |
46 | #include <func.h> |
41 | #include <console/kconsole.h> |
47 | #include <console/kconsole.h> |
42 | #include <arch/debugger.h> |
48 | #include <arch/debugger.h> |
43 | 49 | ||
44 | static char * exctable[] = { |
50 | static char * exctable[] = { |
45 | "Interrupt","TLB Modified","TLB Invalid","TLB Invalid Store", |
51 | "Interrupt","TLB Modified","TLB Invalid","TLB Invalid Store", |
46 | "Address Error - load/instr. fetch", |
52 | "Address Error - load/instr. fetch", |
47 | "Address Error - store", |
53 | "Address Error - store", |
48 | "Bus Error - fetch instruction", |
54 | "Bus Error - fetch instruction", |
49 | "Bus Error - data reference", |
55 | "Bus Error - data reference", |
50 | "Syscall", |
56 | "Syscall", |
51 | "BreakPoint", |
57 | "BreakPoint", |
52 | "Reserved Instruction", |
58 | "Reserved Instruction", |
53 | "Coprocessor Unusable", |
59 | "Coprocessor Unusable", |
54 | "Arithmetic Overflow", |
60 | "Arithmetic Overflow", |
55 | "Trap", |
61 | "Trap", |
56 | "Virtual Coherency - instruction", |
62 | "Virtual Coherency - instruction", |
57 | "Floating Point", |
63 | "Floating Point", |
58 | NULL, NULL, NULL, NULL, NULL, NULL, NULL, |
64 | NULL, NULL, NULL, NULL, NULL, NULL, NULL, |
59 | "WatchHi/WatchLo", /* 23 */ |
65 | "WatchHi/WatchLo", /* 23 */ |
60 | NULL, NULL, NULL, NULL, NULL, NULL, NULL, |
66 | NULL, NULL, NULL, NULL, NULL, NULL, NULL, |
61 | "Virtual Coherency - data", |
67 | "Virtual Coherency - data", |
62 | }; |
68 | }; |
63 | 69 | ||
64 | static void print_regdump(istate_t *istate) |
70 | static void print_regdump(istate_t *istate) |
65 | { |
71 | { |
66 | char *pcsymbol = ""; |
72 | char *pcsymbol = ""; |
67 | char *rasymbol = ""; |
73 | char *rasymbol = ""; |
68 | 74 | ||
69 | char *s = get_symtab_entry(istate->epc); |
75 | char *s = get_symtab_entry(istate->epc); |
70 | if (s) |
76 | if (s) |
71 | pcsymbol = s; |
77 | pcsymbol = s; |
72 | s = get_symtab_entry(istate->ra); |
78 | s = get_symtab_entry(istate->ra); |
73 | if (s) |
79 | if (s) |
74 | rasymbol = s; |
80 | rasymbol = s; |
75 | 81 | ||
76 | 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); |
77 | } |
83 | } |
78 | 84 | ||
79 | static void unhandled_exception(int n, istate_t *istate) |
85 | static void unhandled_exception(int n, istate_t *istate) |
80 | { |
86 | { |
81 | fault_if_from_uspace(istate, "unhandled exception %s", exctable[n]); |
87 | fault_if_from_uspace(istate, "unhandled exception %s", exctable[n]); |
82 | 88 | ||
83 | print_regdump(istate); |
89 | print_regdump(istate); |
84 | panic("unhandled exception %s\n", exctable[n]); |
90 | panic("unhandled exception %s\n", exctable[n]); |
85 | } |
91 | } |
86 | 92 | ||
87 | static void reserved_instr_exception(int n, istate_t *istate) |
93 | static void reserved_instr_exception(int n, istate_t *istate) |
88 | { |
94 | { |
89 | if (*((__u32 *)istate->epc) == 0x7c03e83b) { |
95 | if (*((__u32 *)istate->epc) == 0x7c03e83b) { |
90 | ASSERT(THREAD); |
96 | ASSERT(THREAD); |
91 | istate->epc += 4; |
97 | istate->epc += 4; |
92 | istate->v1 = istate->k1; |
98 | istate->v1 = istate->k1; |
93 | } else |
99 | } else |
94 | unhandled_exception(n, istate); |
100 | unhandled_exception(n, istate); |
95 | } |
101 | } |
96 | 102 | ||
97 | static void breakpoint_exception(int n, istate_t *istate) |
103 | static void breakpoint_exception(int n, istate_t *istate) |
98 | { |
104 | { |
99 | #ifdef CONFIG_DEBUG |
105 | #ifdef CONFIG_DEBUG |
100 | debugger_bpoint(istate); |
106 | debugger_bpoint(istate); |
101 | #else |
107 | #else |
102 | /* it is necessary to not re-execute BREAK instruction after |
108 | /* it is necessary to not re-execute BREAK instruction after |
103 | returning from Exception handler |
109 | returning from Exception handler |
104 | (see page 138 in R4000 Manual for more information) */ |
110 | (see page 138 in R4000 Manual for more information) */ |
105 | istate->epc += 4; |
111 | istate->epc += 4; |
106 | #endif |
112 | #endif |
107 | } |
113 | } |
108 | 114 | ||
109 | static void tlbmod_exception(int n, istate_t *istate) |
115 | static void tlbmod_exception(int n, istate_t *istate) |
110 | { |
116 | { |
111 | tlb_modified(istate); |
117 | tlb_modified(istate); |
112 | } |
118 | } |
113 | 119 | ||
114 | static void tlbinv_exception(int n, istate_t *istate) |
120 | static void tlbinv_exception(int n, istate_t *istate) |
115 | { |
121 | { |
116 | tlb_invalid(istate); |
122 | tlb_invalid(istate); |
117 | } |
123 | } |
118 | 124 | ||
119 | #ifdef CONFIG_FPU_LAZY |
125 | #ifdef CONFIG_FPU_LAZY |
120 | static void cpuns_exception(int n, istate_t *istate) |
126 | static void cpuns_exception(int n, istate_t *istate) |
121 | { |
127 | { |
122 | if (cp0_cause_coperr(cp0_cause_read()) == fpu_cop_id) |
128 | if (cp0_cause_coperr(cp0_cause_read()) == fpu_cop_id) |
123 | scheduler_fpu_lazy_request(); |
129 | scheduler_fpu_lazy_request(); |
124 | else { |
130 | else { |
125 | fault_if_from_uspace(istate, "unhandled Coprocessor Unusable Exception"); |
131 | fault_if_from_uspace(istate, "unhandled Coprocessor Unusable Exception"); |
126 | panic("unhandled Coprocessor Unusable Exception\n"); |
132 | panic("unhandled Coprocessor Unusable Exception\n"); |
127 | } |
133 | } |
128 | } |
134 | } |
129 | #endif |
135 | #endif |
130 | 136 | ||
131 | static void interrupt_exception(int n, istate_t *istate) |
137 | static void interrupt_exception(int n, istate_t *istate) |
132 | { |
138 | { |
133 | __u32 cause; |
139 | __u32 cause; |
134 | int i; |
140 | int i; |
135 | 141 | ||
136 | /* decode interrupt number and process the interrupt */ |
142 | /* decode interrupt number and process the interrupt */ |
137 | cause = (cp0_cause_read() >> 8) &0xff; |
143 | cause = (cp0_cause_read() >> 8) &0xff; |
138 | 144 | ||
139 | for (i = 0; i < 8; i++) |
145 | for (i = 0; i < 8; i++) |
140 | if (cause & (1 << i)) |
146 | if (cause & (1 << i)) |
141 | exc_dispatch(i+INT_OFFSET, istate); |
147 | exc_dispatch(i+INT_OFFSET, istate); |
142 | } |
148 | } |
143 | 149 | ||
144 | /** Handle syscall userspace call */ |
150 | /** Handle syscall userspace call */ |
145 | static void syscall_exception(int n, istate_t *istate) |
151 | static void syscall_exception(int n, istate_t *istate) |
146 | { |
152 | { |
147 | panic("Syscall is handled through shortcut"); |
153 | panic("Syscall is handled through shortcut"); |
148 | } |
154 | } |
149 | 155 | ||
150 | void exception_init(void) |
156 | void exception_init(void) |
151 | { |
157 | { |
152 | int i; |
158 | int i; |
153 | 159 | ||
154 | /* Clear exception table */ |
160 | /* Clear exception table */ |
155 | for (i=0;i < IVT_ITEMS; i++) |
161 | for (i=0;i < IVT_ITEMS; i++) |
156 | exc_register(i, "undef", (iroutine) unhandled_exception); |
162 | exc_register(i, "undef", (iroutine) unhandled_exception); |
157 | exc_register(EXC_Bp, "bkpoint", (iroutine) breakpoint_exception); |
163 | exc_register(EXC_Bp, "bkpoint", (iroutine) breakpoint_exception); |
158 | exc_register(EXC_RI, "resinstr", (iroutine) reserved_instr_exception); |
164 | exc_register(EXC_RI, "resinstr", (iroutine) reserved_instr_exception); |
159 | exc_register(EXC_Mod, "tlb_mod", (iroutine) tlbmod_exception); |
165 | exc_register(EXC_Mod, "tlb_mod", (iroutine) tlbmod_exception); |
160 | exc_register(EXC_TLBL, "tlbinvl", (iroutine) tlbinv_exception); |
166 | exc_register(EXC_TLBL, "tlbinvl", (iroutine) tlbinv_exception); |
161 | exc_register(EXC_TLBS, "tlbinvl", (iroutine) tlbinv_exception); |
167 | exc_register(EXC_TLBS, "tlbinvl", (iroutine) tlbinv_exception); |
162 | exc_register(EXC_Int, "interrupt", (iroutine) interrupt_exception); |
168 | exc_register(EXC_Int, "interrupt", (iroutine) interrupt_exception); |
163 | #ifdef CONFIG_FPU_LAZY |
169 | #ifdef CONFIG_FPU_LAZY |
164 | exc_register(EXC_CpU, "cpunus", (iroutine) cpuns_exception); |
170 | exc_register(EXC_CpU, "cpunus", (iroutine) cpuns_exception); |
165 | #endif |
171 | #endif |
166 | exc_register(EXC_Sys, "syscall", (iroutine) syscall_exception); |
172 | exc_register(EXC_Sys, "syscall", (iroutine) syscall_exception); |
167 | } |
173 | } |
- | 174 | ||
- | 175 | /** @} |
|
- | 176 | */ |
|
- | 177 | ||
168 | 178 |