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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 <arch/mm/tlb.h> |
37 | #include <arch/mm/tlb.h> |
38 | #include <panic.h> |
38 | #include <panic.h> |
39 | #include <arch/cp0.h> |
39 | #include <arch/cp0.h> |
40 | #include <arch/types.h> |
40 | #include <arch/types.h> |
41 | #include <arch.h> |
41 | #include <arch.h> |
42 | #include <debug.h> |
42 | #include <debug.h> |
43 | #include <proc/thread.h> |
43 | #include <proc/thread.h> |
44 | #include <symtab.h> |
- | |
45 | #include <print.h> |
44 | #include <print.h> |
46 | #include <interrupt.h> |
45 | #include <interrupt.h> |
47 | #include <func.h> |
46 | #include <func.h> |
48 | #include <ddi/irq.h> |
47 | #include <ddi/irq.h> |
49 | #include <arch/debugger.h> |
48 | #include <arch/debugger.h> |
- | 49 | #include <symtab.h> |
|
50 | 50 | ||
51 | static char * exctable[] = { |
51 | static char * exctable[] = { |
52 | "Interrupt", |
52 | "Interrupt", |
53 | "TLB Modified", |
53 | "TLB Modified", |
54 | "TLB Invalid", |
54 | "TLB Invalid", |
55 | "TLB Invalid Store", |
55 | "TLB Invalid Store", |
56 | "Address Error - load/instr. fetch", |
56 | "Address Error - load/instr. fetch", |
57 | "Address Error - store", |
57 | "Address Error - store", |
58 | "Bus Error - fetch instruction", |
58 | "Bus Error - fetch instruction", |
59 | "Bus Error - data reference", |
59 | "Bus Error - data reference", |
60 | "Syscall", |
60 | "Syscall", |
61 | "BreakPoint", |
61 | "BreakPoint", |
62 | "Reserved Instruction", |
62 | "Reserved Instruction", |
63 | "Coprocessor Unusable", |
63 | "Coprocessor Unusable", |
64 | "Arithmetic Overflow", |
64 | "Arithmetic Overflow", |
65 | "Trap", |
65 | "Trap", |
66 | "Virtual Coherency - instruction", |
66 | "Virtual Coherency - instruction", |
67 | "Floating Point", |
67 | "Floating Point", |
68 | NULL, NULL, NULL, NULL, NULL, NULL, NULL, |
68 | NULL, NULL, NULL, NULL, NULL, NULL, NULL, |
69 | "WatchHi/WatchLo", /* 23 */ |
69 | "WatchHi/WatchLo", /* 23 */ |
70 | NULL, NULL, NULL, NULL, NULL, NULL, NULL, |
70 | NULL, NULL, NULL, NULL, NULL, NULL, NULL, |
71 | "Virtual Coherency - data", |
71 | "Virtual Coherency - data", |
72 | }; |
72 | }; |
73 | 73 | ||
74 | static void print_regdump(istate_t *istate) |
74 | static void print_regdump(istate_t *istate) |
75 | { |
75 | { |
76 | char *pcsymbol = ""; |
76 | char *pcsymbol, *rasymbol; |
77 | char *rasymbol = ""; |
- | |
78 | 77 | ||
79 | char *s = get_symtab_entry(istate->epc); |
78 | pcsymbol = symtab_fmt_name_lookup(istate->epc); |
80 | if (s) |
- | |
81 | pcsymbol = s; |
- | |
82 | s = get_symtab_entry(istate->ra); |
79 | rasymbol = symtab_fmt_name_lookup(istate->ra); |
83 | if (s) |
- | |
84 | rasymbol = s; |
- | |
85 | 80 | ||
86 | printf("PC: %#x(%s) RA: %#x(%s), SP(%p)\n", istate->epc, pcsymbol, istate->ra, rasymbol, istate->sp); |
81 | printf("PC: %#x(%s) RA: %#x(%s), SP(%p)\n", istate->epc, pcsymbol, |
- | 82 | istate->ra, rasymbol, istate->sp); |
|
87 | } |
83 | } |
88 | 84 | ||
89 | static void unhandled_exception(int n, istate_t *istate) |
85 | static void unhandled_exception(int n, istate_t *istate) |
90 | { |
86 | { |
91 | fault_if_from_uspace(istate, "Unhandled exception %s.", exctable[n]); |
87 | fault_if_from_uspace(istate, "Unhandled exception %s.", exctable[n]); |
92 | 88 | ||
93 | print_regdump(istate); |
89 | print_regdump(istate); |
94 | panic("Unhandled exception %s.", exctable[n]); |
90 | panic("Unhandled exception %s.", exctable[n]); |
95 | } |
91 | } |
96 | 92 | ||
97 | static void reserved_instr_exception(int n, istate_t *istate) |
93 | static void reserved_instr_exception(int n, istate_t *istate) |
98 | { |
94 | { |
99 | if (*((uint32_t *)istate->epc) == 0x7c03e83b) { |
95 | if (*((uint32_t *)istate->epc) == 0x7c03e83b) { |
100 | ASSERT(THREAD); |
96 | ASSERT(THREAD); |
101 | istate->epc += 4; |
97 | istate->epc += 4; |
102 | istate->v1 = istate->k1; |
98 | istate->v1 = istate->k1; |
103 | } else |
99 | } else |
104 | unhandled_exception(n, istate); |
100 | unhandled_exception(n, istate); |
105 | } |
101 | } |
106 | 102 | ||
107 | static void breakpoint_exception(int n, istate_t *istate) |
103 | static void breakpoint_exception(int n, istate_t *istate) |
108 | { |
104 | { |
109 | #ifdef CONFIG_DEBUG |
105 | #ifdef CONFIG_DEBUG |
110 | debugger_bpoint(istate); |
106 | debugger_bpoint(istate); |
111 | #else |
107 | #else |
112 | /* it is necessary to not re-execute BREAK instruction after |
108 | /* it is necessary to not re-execute BREAK instruction after |
113 | returning from Exception handler |
109 | returning from Exception handler |
114 | (see page 138 in R4000 Manual for more information) */ |
110 | (see page 138 in R4000 Manual for more information) */ |
115 | istate->epc += 4; |
111 | istate->epc += 4; |
116 | #endif |
112 | #endif |
117 | } |
113 | } |
118 | 114 | ||
119 | static void tlbmod_exception(int n, istate_t *istate) |
115 | static void tlbmod_exception(int n, istate_t *istate) |
120 | { |
116 | { |
121 | tlb_modified(istate); |
117 | tlb_modified(istate); |
122 | } |
118 | } |
123 | 119 | ||
124 | static void tlbinv_exception(int n, istate_t *istate) |
120 | static void tlbinv_exception(int n, istate_t *istate) |
125 | { |
121 | { |
126 | tlb_invalid(istate); |
122 | tlb_invalid(istate); |
127 | } |
123 | } |
128 | 124 | ||
129 | #ifdef CONFIG_FPU_LAZY |
125 | #ifdef CONFIG_FPU_LAZY |
130 | static void cpuns_exception(int n, istate_t *istate) |
126 | static void cpuns_exception(int n, istate_t *istate) |
131 | { |
127 | { |
132 | if (cp0_cause_coperr(cp0_cause_read()) == fpu_cop_id) |
128 | if (cp0_cause_coperr(cp0_cause_read()) == fpu_cop_id) |
133 | scheduler_fpu_lazy_request(); |
129 | scheduler_fpu_lazy_request(); |
134 | else { |
130 | else { |
135 | fault_if_from_uspace(istate, "Unhandled Coprocessor Unusable Exception."); |
131 | fault_if_from_uspace(istate, "Unhandled Coprocessor Unusable Exception."); |
136 | panic("Unhandled Coprocessor Unusable Exception."); |
132 | panic("Unhandled Coprocessor Unusable Exception."); |
137 | } |
133 | } |
138 | } |
134 | } |
139 | #endif |
135 | #endif |
140 | 136 | ||
141 | static void interrupt_exception(int n, istate_t *istate) |
137 | static void interrupt_exception(int n, istate_t *istate) |
142 | { |
138 | { |
143 | uint32_t cause; |
139 | uint32_t cause; |
144 | int i; |
140 | int i; |
145 | 141 | ||
146 | /* decode interrupt number and process the interrupt */ |
142 | /* decode interrupt number and process the interrupt */ |
147 | cause = (cp0_cause_read() >> 8) & 0xff; |
143 | cause = (cp0_cause_read() >> 8) & 0xff; |
148 | 144 | ||
149 | for (i = 0; i < 8; i++) { |
145 | for (i = 0; i < 8; i++) { |
150 | if (cause & (1 << i)) { |
146 | if (cause & (1 << i)) { |
151 | irq_t *irq = irq_dispatch_and_lock(i); |
147 | irq_t *irq = irq_dispatch_and_lock(i); |
152 | if (irq) { |
148 | if (irq) { |
153 | /* |
149 | /* |
154 | * The IRQ handler was found. |
150 | * The IRQ handler was found. |
155 | */ |
151 | */ |
156 | irq->handler(irq); |
152 | irq->handler(irq); |
157 | spinlock_unlock(&irq->lock); |
153 | spinlock_unlock(&irq->lock); |
158 | } else { |
154 | } else { |
159 | /* |
155 | /* |
160 | * Spurious interrupt. |
156 | * Spurious interrupt. |
161 | */ |
157 | */ |
162 | #ifdef CONFIG_DEBUG |
158 | #ifdef CONFIG_DEBUG |
163 | printf("cpu%u: spurious interrupt (inum=%d)\n", |
159 | printf("cpu%u: spurious interrupt (inum=%d)\n", |
164 | CPU->id, i); |
160 | CPU->id, i); |
165 | #endif |
161 | #endif |
166 | } |
162 | } |
167 | } |
163 | } |
168 | } |
164 | } |
169 | } |
165 | } |
170 | 166 | ||
171 | /** Handle syscall userspace call */ |
167 | /** Handle syscall userspace call */ |
172 | static void syscall_exception(int n, istate_t *istate) |
168 | static void syscall_exception(int n, istate_t *istate) |
173 | { |
169 | { |
174 | panic("Syscall is handled through shortcut."); |
170 | panic("Syscall is handled through shortcut."); |
175 | } |
171 | } |
176 | 172 | ||
177 | void exception_init(void) |
173 | void exception_init(void) |
178 | { |
174 | { |
179 | int i; |
175 | int i; |
180 | 176 | ||
181 | /* Clear exception table */ |
177 | /* Clear exception table */ |
182 | for (i = 0; i < IVT_ITEMS; i++) |
178 | for (i = 0; i < IVT_ITEMS; i++) |
183 | exc_register(i, "undef", (iroutine) unhandled_exception); |
179 | exc_register(i, "undef", (iroutine) unhandled_exception); |
184 | 180 | ||
185 | exc_register(EXC_Bp, "bkpoint", (iroutine) breakpoint_exception); |
181 | exc_register(EXC_Bp, "bkpoint", (iroutine) breakpoint_exception); |
186 | exc_register(EXC_RI, "resinstr", (iroutine) reserved_instr_exception); |
182 | exc_register(EXC_RI, "resinstr", (iroutine) reserved_instr_exception); |
187 | exc_register(EXC_Mod, "tlb_mod", (iroutine) tlbmod_exception); |
183 | exc_register(EXC_Mod, "tlb_mod", (iroutine) tlbmod_exception); |
188 | exc_register(EXC_TLBL, "tlbinvl", (iroutine) tlbinv_exception); |
184 | exc_register(EXC_TLBL, "tlbinvl", (iroutine) tlbinv_exception); |
189 | exc_register(EXC_TLBS, "tlbinvl", (iroutine) tlbinv_exception); |
185 | exc_register(EXC_TLBS, "tlbinvl", (iroutine) tlbinv_exception); |
190 | exc_register(EXC_Int, "interrupt", (iroutine) interrupt_exception); |
186 | exc_register(EXC_Int, "interrupt", (iroutine) interrupt_exception); |
191 | #ifdef CONFIG_FPU_LAZY |
187 | #ifdef CONFIG_FPU_LAZY |
192 | exc_register(EXC_CpU, "cpunus", (iroutine) cpuns_exception); |
188 | exc_register(EXC_CpU, "cpunus", (iroutine) cpuns_exception); |
193 | #endif |
189 | #endif |
194 | exc_register(EXC_Sys, "syscall", (iroutine) syscall_exception); |
190 | exc_register(EXC_Sys, "syscall", (iroutine) syscall_exception); |
195 | } |
191 | } |
196 | 192 | ||
197 | /** @} |
193 | /** @} |
198 | */ |
194 | */ |
199 | 195 |