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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 |
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 |