Rev 1100 | Rev 1126 | Go to most recent revision | Only display areas with differences | Ignore whitespace | Details | Blame | Last modification | View Log | RSS feed
Rev 1100 | Rev 1119 | ||
---|---|---|---|
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 | #include <arch/exception.h> |
29 | #include <arch/exception.h> |
30 | #include <arch/interrupt.h> |
30 | #include <arch/interrupt.h> |
31 | #include <panic.h> |
31 | #include <panic.h> |
32 | #include <arch/cp0.h> |
32 | #include <arch/cp0.h> |
33 | #include <arch/types.h> |
33 | #include <arch/types.h> |
34 | #include <arch.h> |
34 | #include <arch.h> |
35 | #include <debug.h> |
35 | #include <debug.h> |
36 | #include <proc/thread.h> |
36 | #include <proc/thread.h> |
37 | #include <symtab.h> |
37 | #include <symtab.h> |
38 | #include <print.h> |
38 | #include <print.h> |
39 | #include <interrupt.h> |
39 | #include <interrupt.h> |
40 | #include <func.h> |
40 | #include <func.h> |
41 | #include <console/kconsole.h> |
41 | #include <console/kconsole.h> |
42 | #include <arch/debugger.h> |
42 | #include <arch/debugger.h> |
43 | 43 | ||
44 | static char * exctable[] = { |
44 | static char * exctable[] = { |
45 | "Interrupt","TLB Modified","TLB Invalid","TLB Invalid Store", |
45 | "Interrupt","TLB Modified","TLB Invalid","TLB Invalid Store", |
46 | "Address Error - load/instr. fetch", |
46 | "Address Error - load/instr. fetch", |
47 | "Address Error - store", |
47 | "Address Error - store", |
48 | "Bus Error - fetch instruction", |
48 | "Bus Error - fetch instruction", |
49 | "Bus Error - data reference", |
49 | "Bus Error - data reference", |
50 | "Syscall", |
50 | "Syscall", |
51 | "BreakPoint", |
51 | "BreakPoint", |
52 | "Reserved Instruction", |
52 | "Reserved Instruction", |
53 | "Coprocessor Unusable", |
53 | "Coprocessor Unusable", |
54 | "Arithmetic Overflow", |
54 | "Arithmetic Overflow", |
55 | "Trap", |
55 | "Trap", |
56 | "Virtual Coherency - instruction", |
56 | "Virtual Coherency - instruction", |
57 | "Floating Point", |
57 | "Floating Point", |
58 | NULL, NULL, NULL, NULL, NULL, NULL, NULL, |
58 | NULL, NULL, NULL, NULL, NULL, NULL, NULL, |
59 | "WatchHi/WatchLo", /* 23 */ |
59 | "WatchHi/WatchLo", /* 23 */ |
60 | NULL, NULL, NULL, NULL, NULL, NULL, NULL, |
60 | NULL, NULL, NULL, NULL, NULL, NULL, NULL, |
61 | "Virtual Coherency - data", |
61 | "Virtual Coherency - data", |
62 | }; |
62 | }; |
63 | 63 | ||
64 | static void print_regdump(istate_t *istate) |
64 | static void print_regdump(istate_t *istate) |
65 | { |
65 | { |
66 | char *pcsymbol = ""; |
66 | char *pcsymbol = ""; |
67 | char *rasymbol = ""; |
67 | char *rasymbol = ""; |
68 | 68 | ||
69 | char *s = get_symtab_entry(istate->epc); |
69 | char *s = get_symtab_entry(istate->epc); |
70 | if (s) |
70 | if (s) |
71 | pcsymbol = s; |
71 | pcsymbol = s; |
72 | s = get_symtab_entry(istate->ra); |
72 | s = get_symtab_entry(istate->ra); |
73 | if (s) |
73 | if (s) |
74 | rasymbol = s; |
74 | rasymbol = s; |
75 | 75 | ||
76 | printf("PC: %X(%s) RA: %X(%s), SP(%P)\n",istate->epc,pcsymbol, |
76 | printf("PC: %X(%s) RA: %X(%s), SP(%P)\n",istate->epc,pcsymbol, |
77 | istate->ra,rasymbol, istate->sp); |
77 | istate->ra,rasymbol, istate->sp); |
78 | } |
78 | } |
79 | 79 | ||
80 | static void unhandled_exception(int n, istate_t *istate) |
80 | static void unhandled_exception(int n, istate_t *istate) |
81 | { |
81 | { |
82 | print_regdump(istate); |
82 | print_regdump(istate); |
83 | panic("unhandled exception %s\n", exctable[n]); |
83 | panic("unhandled exception %s\n", exctable[n]); |
84 | } |
84 | } |
85 | 85 | ||
- | 86 | static void reserved_instr_exception(int n, istate_t *istate) |
|
- | 87 | { |
|
- | 88 | if (*((__u32 *)istate->epc) == 0x7c03e83b) { |
|
- | 89 | ASSERT(THREAD); |
|
- | 90 | istate->epc += 4; |
|
- | 91 | istate->v1 = istate->k1; |
|
- | 92 | } else { |
|
- | 93 | print_regdump(istate); |
|
- | 94 | panic("reserved instruction"); |
|
- | 95 | } |
|
- | 96 | } |
|
- | 97 | ||
86 | static void breakpoint_exception(int n, istate_t *istate) |
98 | static void breakpoint_exception(int n, istate_t *istate) |
87 | { |
99 | { |
88 | #ifdef CONFIG_DEBUG |
100 | #ifdef CONFIG_DEBUG |
89 | debugger_bpoint(istate); |
101 | debugger_bpoint(istate); |
90 | #else |
102 | #else |
91 | /* it is necessary to not re-execute BREAK instruction after |
103 | /* it is necessary to not re-execute BREAK instruction after |
92 | returning from Exception handler |
104 | returning from Exception handler |
93 | (see page 138 in R4000 Manual for more information) */ |
105 | (see page 138 in R4000 Manual for more information) */ |
94 | istate->epc += 4; |
106 | istate->epc += 4; |
95 | #endif |
107 | #endif |
96 | } |
108 | } |
97 | 109 | ||
98 | static void tlbmod_exception(int n, istate_t *istate) |
110 | static void tlbmod_exception(int n, istate_t *istate) |
99 | { |
111 | { |
100 | tlb_modified(istate); |
112 | tlb_modified(istate); |
101 | } |
113 | } |
102 | 114 | ||
103 | static void tlbinv_exception(int n, istate_t *istate) |
115 | static void tlbinv_exception(int n, istate_t *istate) |
104 | { |
116 | { |
105 | tlb_invalid(istate); |
117 | tlb_invalid(istate); |
106 | } |
118 | } |
107 | 119 | ||
108 | #ifdef CONFIG_FPU_LAZY |
120 | #ifdef CONFIG_FPU_LAZY |
109 | static void cpuns_exception(int n, istate_t *istate) |
121 | static void cpuns_exception(int n, istate_t *istate) |
110 | { |
122 | { |
111 | if (cp0_cause_coperr(cp0_cause_read()) == fpu_cop_id) |
123 | if (cp0_cause_coperr(cp0_cause_read()) == fpu_cop_id) |
112 | scheduler_fpu_lazy_request(); |
124 | scheduler_fpu_lazy_request(); |
113 | else |
125 | else |
114 | panic("unhandled Coprocessor Unusable Exception\n"); |
126 | panic("unhandled Coprocessor Unusable Exception\n"); |
115 | } |
127 | } |
116 | #endif |
128 | #endif |
117 | 129 | ||
118 | static void interrupt_exception(int n, istate_t *istate) |
130 | static void interrupt_exception(int n, istate_t *istate) |
119 | { |
131 | { |
120 | __u32 cause; |
132 | __u32 cause; |
121 | int i; |
133 | int i; |
122 | 134 | ||
123 | /* decode interrupt number and process the interrupt */ |
135 | /* decode interrupt number and process the interrupt */ |
124 | cause = (cp0_cause_read() >> 8) &0xff; |
136 | cause = (cp0_cause_read() >> 8) &0xff; |
125 | 137 | ||
126 | for (i = 0; i < 8; i++) |
138 | for (i = 0; i < 8; i++) |
127 | if (cause & (1 << i)) |
139 | if (cause & (1 << i)) |
128 | exc_dispatch(i+INT_OFFSET, istate); |
140 | exc_dispatch(i+INT_OFFSET, istate); |
129 | } |
141 | } |
130 | 142 | ||
131 | /** Handle syscall userspace call */ |
143 | /** Handle syscall userspace call */ |
132 | static void syscall_exception(int n, istate_t *istate) |
144 | static void syscall_exception(int n, istate_t *istate) |
133 | { |
145 | { |
134 | panic("Syscall is handled through shortcut"); |
146 | panic("Syscall is handled through shortcut"); |
135 | } |
147 | } |
136 | 148 | ||
137 | void exception_init(void) |
149 | void exception_init(void) |
138 | { |
150 | { |
139 | int i; |
151 | int i; |
140 | 152 | ||
141 | /* Clear exception table */ |
153 | /* Clear exception table */ |
142 | for (i=0;i < IVT_ITEMS; i++) |
154 | for (i=0;i < IVT_ITEMS; i++) |
143 | exc_register(i, "undef", (iroutine) unhandled_exception); |
155 | exc_register(i, "undef", (iroutine) unhandled_exception); |
144 | exc_register(EXC_Bp, "bkpoint", (iroutine) breakpoint_exception); |
156 | exc_register(EXC_Bp, "bkpoint", (iroutine) breakpoint_exception); |
- | 157 | exc_register(EXC_RI, "resinstr", (iroutine) reserved_instr_exception); |
|
145 | exc_register(EXC_Mod, "tlb_mod", (iroutine) tlbmod_exception); |
158 | exc_register(EXC_Mod, "tlb_mod", (iroutine) tlbmod_exception); |
146 | exc_register(EXC_TLBL, "tlbinvl", (iroutine) tlbinv_exception); |
159 | exc_register(EXC_TLBL, "tlbinvl", (iroutine) tlbinv_exception); |
147 | exc_register(EXC_TLBS, "tlbinvl", (iroutine) tlbinv_exception); |
160 | exc_register(EXC_TLBS, "tlbinvl", (iroutine) tlbinv_exception); |
148 | exc_register(EXC_Int, "interrupt", (iroutine) interrupt_exception); |
161 | exc_register(EXC_Int, "interrupt", (iroutine) interrupt_exception); |
149 | #ifdef CONFIG_FPU_LAZY |
162 | #ifdef CONFIG_FPU_LAZY |
150 | exc_register(EXC_CpU, "cpunus", (iroutine) cpuns_exception); |
163 | exc_register(EXC_CpU, "cpunus", (iroutine) cpuns_exception); |
151 | #endif |
164 | #endif |
152 | exc_register(EXC_Sys, "syscall", (iroutine) syscall_exception); |
165 | exc_register(EXC_Sys, "syscall", (iroutine) syscall_exception); |
153 | } |
166 | } |
154 | 167 |