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