2 * MIPS Exceptions processing helpers for QEMU.
4 * Copyright (c) 2004-2005 Jocelyn Mayer
6 * This library is free software; you can redistribute it and/or
7 * modify it under the terms of the GNU Lesser General Public
8 * License as published by the Free Software Foundation; either
9 * version 2.1 of the License, or (at your option) any later version.
11 * This library is distributed in the hope that it will be useful,
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
14 * Lesser General Public License for more details.
16 * You should have received a copy of the GNU Lesser General Public
17 * License along with this library; if not, see <http://www.gnu.org/licenses/>.
21 #include "qemu/osdep.h"
24 #include "exec/helper-proto.h"
25 #include "exec/exec-all.h"
27 target_ulong
exception_resume_pc(CPUMIPSState
*env
)
30 target_ulong isa_mode
;
32 isa_mode
= !!(env
->hflags
& MIPS_HFLAG_M16
);
33 bad_pc
= env
->active_tc
.PC
| isa_mode
;
34 if (env
->hflags
& MIPS_HFLAG_BMASK
) {
36 * If the exception was raised from a delay slot, come back to
39 bad_pc
-= (env
->hflags
& MIPS_HFLAG_B16
? 2 : 4);
45 void helper_raise_exception_err(CPUMIPSState
*env
, uint32_t exception
,
48 do_raise_exception_err(env
, exception
, error_code
, 0);
51 void helper_raise_exception(CPUMIPSState
*env
, uint32_t exception
)
53 do_raise_exception(env
, exception
, GETPC());
56 void helper_raise_exception_debug(CPUMIPSState
*env
)
58 do_raise_exception(env
, EXCP_DEBUG
, 0);
61 static void raise_exception(CPUMIPSState
*env
, uint32_t exception
)
63 do_raise_exception(env
, exception
, 0);
66 void helper_wait(CPUMIPSState
*env
)
68 CPUState
*cs
= env_cpu(env
);
71 cpu_reset_interrupt(cs
, CPU_INTERRUPT_WAKE
);
73 * Last instruction in the block, PC was updated before
74 * - no need to recover PC and icount.
76 raise_exception(env
, EXCP_HLT
);
79 void mips_cpu_synchronize_from_tb(CPUState
*cs
, const TranslationBlock
*tb
)
81 MIPSCPU
*cpu
= MIPS_CPU(cs
);
82 CPUMIPSState
*env
= &cpu
->env
;
84 env
->active_tc
.PC
= tb
->pc
;
85 env
->hflags
&= ~MIPS_HFLAG_BMASK
;
86 env
->hflags
|= tb
->flags
& MIPS_HFLAG_BMASK
;
89 static const char * const excp_names
[EXCP_LAST
+ 1] = {
90 [EXCP_RESET
] = "reset",
91 [EXCP_SRESET
] = "soft reset",
92 [EXCP_DSS
] = "debug single step",
93 [EXCP_DINT
] = "debug interrupt",
94 [EXCP_NMI
] = "non-maskable interrupt",
95 [EXCP_MCHECK
] = "machine check",
96 [EXCP_EXT_INTERRUPT
] = "interrupt",
97 [EXCP_DFWATCH
] = "deferred watchpoint",
98 [EXCP_DIB
] = "debug instruction breakpoint",
99 [EXCP_IWATCH
] = "instruction fetch watchpoint",
100 [EXCP_AdEL
] = "address error load",
101 [EXCP_AdES
] = "address error store",
102 [EXCP_TLBF
] = "TLB refill",
103 [EXCP_IBE
] = "instruction bus error",
104 [EXCP_DBp
] = "debug breakpoint",
105 [EXCP_SYSCALL
] = "syscall",
106 [EXCP_BREAK
] = "break",
107 [EXCP_CpU
] = "coprocessor unusable",
108 [EXCP_RI
] = "reserved instruction",
109 [EXCP_OVERFLOW
] = "arithmetic overflow",
110 [EXCP_TRAP
] = "trap",
111 [EXCP_FPE
] = "floating point",
112 [EXCP_DDBS
] = "debug data break store",
113 [EXCP_DWATCH
] = "data watchpoint",
114 [EXCP_LTLBL
] = "TLB modify",
115 [EXCP_TLBL
] = "TLB load",
116 [EXCP_TLBS
] = "TLB store",
117 [EXCP_DBE
] = "data bus error",
118 [EXCP_DDBL
] = "debug data break load",
119 [EXCP_THREAD
] = "thread",
120 [EXCP_MDMX
] = "MDMX",
121 [EXCP_C2E
] = "precise coprocessor 2",
122 [EXCP_CACHE
] = "cache error",
123 [EXCP_TLBXI
] = "TLB execute-inhibit",
124 [EXCP_TLBRI
] = "TLB read-inhibit",
125 [EXCP_MSADIS
] = "MSA disabled",
126 [EXCP_MSAFPE
] = "MSA floating point",
129 const char *mips_exception_name(int32_t exception
)
131 if (exception
< 0 || exception
> EXCP_LAST
) {
134 return excp_names
[exception
];
137 void do_raise_exception_err(CPUMIPSState
*env
, uint32_t exception
,
138 int error_code
, uintptr_t pc
)
140 CPUState
*cs
= env_cpu(env
);
142 qemu_log_mask(CPU_LOG_INT
, "%s: %d (%s) %d\n",
143 __func__
, exception
, mips_exception_name(exception
),
145 cs
->exception_index
= exception
;
146 env
->error_code
= error_code
;
148 cpu_loop_exit_restore(cs
, pc
);