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git.proxmox.com Git - mirror_qemu.git/blob - target-cris/op_helper.c
4 * Copyright (c) 2007 AXIS Communications
5 * Written by Edgar E. Iglesias
7 * This library is free software; you can redistribute it and/or
8 * modify it under the terms of the GNU Lesser General Public
9 * License as published by the Free Software Foundation; either
10 * version 2 of the License, or (at your option) any later version.
12 * This library is distributed in the hope that it will be useful,
13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
15 * Lesser General Public License for more details.
17 * You should have received a copy of the GNU Lesser General Public
18 * License along with this library; if not, write to the Free Software
19 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
27 #define MMUSUFFIX _mmu
30 #include "softmmu_template.h"
33 #include "softmmu_template.h"
36 #include "softmmu_template.h"
39 #include "softmmu_template.h"
43 /* Try to fill the TLB and return an exception if error. If retaddr is
44 NULL, it means that the function was called in C code (i.e. not
45 from generated code or from helper.c) */
46 /* XXX: fix it to restore all registers */
47 void tlb_fill (target_ulong addr
, int is_write
, int mmu_idx
, void *retaddr
)
54 /* XXX: hack to restore env in all cases, even if not called from
59 D(fprintf(logfile
, "%s pc=%x tpc=%x ra=%x\n", __func__
,
60 env
->pc
, env
->debug1
, retaddr
));
61 ret
= cpu_cris_handle_mmu_fault(env
, addr
, is_write
, mmu_idx
, 1);
62 if (__builtin_expect(ret
, 0)) {
64 /* now we have a real cpu fault */
65 pc
= (unsigned long)retaddr
;
68 /* the PC is inside the translated code. It means that we have
69 a virtual CPU fault */
70 cpu_restore_state(tb
, env
, pc
, NULL
);
72 /* Evaluate flags after retranslation. */
73 helper_top_evaluate_flags();
81 void helper_raise_exception(uint32_t index
)
83 env
->exception_index
= index
;
87 void helper_tlb_flush_pid(uint32_t pid
)
89 #if !defined(CONFIG_USER_ONLY)
90 cris_mmu_flush_pid(env
, pid
);
94 void helper_dump(uint32_t a0
, uint32_t a1
, uint32_t a2
)
96 (fprintf(logfile
, "%s: a0=%x a1=%x\n", __func__
, a0
, a1
));
99 void helper_dummy(void)
104 /* Used by the tlb decoder. */
105 #define EXTRACT_FIELD(src, start, end) \
106 (((src) >> start) & ((1 << (end - start + 1)) - 1))
108 void helper_movl_sreg_reg (uint32_t sreg
, uint32_t reg
)
111 srs
= env
->pregs
[PR_SRS
];
113 env
->sregs
[srs
][sreg
] = env
->regs
[reg
];
115 #if !defined(CONFIG_USER_ONLY)
116 if (srs
== 1 || srs
== 2) {
118 /* Writes to tlb-hi write to mm_cause as a side
120 env
->sregs
[SFR_RW_MM_TLB_HI
] = T0
;
121 env
->sregs
[SFR_R_MM_CAUSE
] = T0
;
123 else if (sreg
== 5) {
130 idx
= set
= env
->sregs
[SFR_RW_MM_TLB_SEL
];
135 /* We've just made a write to tlb_lo. */
136 lo
= env
->sregs
[SFR_RW_MM_TLB_LO
];
137 /* Writes are done via r_mm_cause. */
138 hi
= env
->sregs
[SFR_R_MM_CAUSE
];
140 vaddr
= EXTRACT_FIELD(env
->tlbsets
[srs
-1][set
][idx
].hi
,
142 vaddr
<<= TARGET_PAGE_BITS
;
143 tlb_v
= EXTRACT_FIELD(env
->tlbsets
[srs
-1][set
][idx
].lo
,
145 env
->tlbsets
[srs
- 1][set
][idx
].lo
= lo
;
146 env
->tlbsets
[srs
- 1][set
][idx
].hi
= hi
;
149 "tlb flush vaddr=%x v=%d pc=%x\n",
150 vaddr
, tlb_v
, env
->pc
));
151 tlb_flush_page(env
, vaddr
);
157 void helper_movl_reg_sreg (uint32_t reg
, uint32_t sreg
)
160 env
->pregs
[PR_SRS
] &= 3;
161 srs
= env
->pregs
[PR_SRS
];
163 #if !defined(CONFIG_USER_ONLY)
164 if (srs
== 1 || srs
== 2)
170 idx
= set
= env
->sregs
[SFR_RW_MM_TLB_SEL
];
175 /* Update the mirror regs. */
176 hi
= env
->tlbsets
[srs
- 1][set
][idx
].hi
;
177 lo
= env
->tlbsets
[srs
- 1][set
][idx
].lo
;
178 env
->sregs
[SFR_RW_MM_TLB_HI
] = hi
;
179 env
->sregs
[SFR_RW_MM_TLB_LO
] = lo
;
182 env
->regs
[reg
] = env
->sregs
[srs
][sreg
];
186 static void cris_ccs_rshift(CPUState
*env
)
190 /* Apply the ccs shift. */
191 ccs
= env
->pregs
[PR_CCS
];
192 ccs
= (ccs
& 0xc0000000) | ((ccs
& 0x0fffffff) >> 10);
195 /* Enter user mode. */
196 env
->ksp
= env
->regs
[R_SP
];
197 env
->regs
[R_SP
] = env
->pregs
[PR_USP
];
200 env
->pregs
[PR_CCS
] = ccs
;
203 void helper_rfe(void)
205 int rflag
= env
->pregs
[PR_CCS
] & R_FLAG
;
207 D(fprintf(logfile
, "rfe: erp=%x pid=%x ccs=%x btarget=%x\n",
208 env
->pregs
[PR_ERP
], env
->pregs
[PR_PID
],
212 cris_ccs_rshift(env
);
214 /* RFE sets the P_FLAG only if the R_FLAG is not set. */
216 env
->pregs
[PR_CCS
] |= P_FLAG
;
219 void helper_store(uint32_t a0
)
221 if (env
->pregs
[PR_CCS
] & P_FLAG
)
223 cpu_abort(env
, "cond_store_failed! pc=%x a0=%x\n",
228 void do_unassigned_access(target_phys_addr_t addr
, int is_write
, int is_exec
,
231 D(printf("%s addr=%x w=%d ex=%d asi=%d\n",
232 __func__
, addr
, is_write
, is_exec
, is_asi
));
235 static void evaluate_flags_writeback(uint32_t flags
)
239 /* Extended arithmetics, leave the z flag alone. */
241 if ((x
|| env
->cc_op
== CC_OP_ADDC
)
243 env
->cc_mask
&= ~Z_FLAG
;
245 /* all insn clear the x-flag except setf or clrf. */
246 env
->pregs
[PR_CCS
] &= ~(env
->cc_mask
| X_FLAG
);
247 flags
&= env
->cc_mask
;
248 env
->pregs
[PR_CCS
] |= flags
;
251 void helper_evaluate_flags_muls(void)
263 res
= env
->cc_result
;
265 dneg
= ((int32_t)res
) < 0;
267 mof
= env
->pregs
[PR_MOF
];
275 if ((dneg
&& mof
!= -1)
276 || (!dneg
&& mof
!= 0))
278 evaluate_flags_writeback(flags
);
281 void helper_evaluate_flags_mulu(void)
292 res
= env
->cc_result
;
294 mof
= env
->pregs
[PR_MOF
];
305 evaluate_flags_writeback(flags
);
308 void helper_evaluate_flags_mcp(void)
317 res
= env
->cc_result
;
319 if ((res
& 0x80000000L
) != 0L)
322 if (((src
& 0x80000000L
) == 0L)
323 && ((dst
& 0x80000000L
) == 0L))
327 else if (((src
& 0x80000000L
) != 0L) &&
328 ((dst
& 0x80000000L
) != 0L))
337 if (((src
& 0x80000000L
) != 0L)
338 && ((dst
& 0x80000000L
) != 0L))
340 if ((dst
& 0x80000000L
) != 0L
341 || (src
& 0x80000000L
) != 0L)
345 evaluate_flags_writeback(flags
);
348 void helper_evaluate_flags_alu_4(void)
358 /* Reconstruct the result. */
368 res
= env
->cc_result
;
372 if (env
->cc_op
== CC_OP_SUB
|| env
->cc_op
== CC_OP_CMP
)
375 if ((res
& 0x80000000L
) != 0L)
378 if (((src
& 0x80000000L
) == 0L)
379 && ((dst
& 0x80000000L
) == 0L))
383 else if (((src
& 0x80000000L
) != 0L) &&
384 ((dst
& 0x80000000L
) != 0L))
393 if (((src
& 0x80000000L
) != 0L)
394 && ((dst
& 0x80000000L
) != 0L))
396 if ((dst
& 0x80000000L
) != 0L
397 || (src
& 0x80000000L
) != 0L)
401 if (env
->cc_op
== CC_OP_SUB
402 || env
->cc_op
== CC_OP_CMP
) {
405 evaluate_flags_writeback(flags
);
408 void helper_evaluate_flags_move_4 (void)
413 res
= env
->cc_result
;
415 if ((int32_t)res
< 0)
420 evaluate_flags_writeback(flags
);
422 void helper_evaluate_flags_move_2 (void)
429 res
= env
->cc_result
;
431 if ((int16_t)res
< 0L)
436 evaluate_flags_writeback(flags
);
439 /* TODO: This is expensive. We could split things up and only evaluate part of
440 CCR on a need to know basis. For now, we simply re-evaluate everything. */
441 void helper_evaluate_flags (void)
450 res
= env
->cc_result
;
452 if (env
->cc_op
== CC_OP_SUB
|| env
->cc_op
== CC_OP_CMP
)
455 /* Now, evaluate the flags. This stuff is based on
456 Per Zander's CRISv10 simulator. */
457 switch (env
->cc_size
)
460 if ((res
& 0x80L
) != 0L)
463 if (((src
& 0x80L
) == 0L)
464 && ((dst
& 0x80L
) == 0L))
468 else if (((src
& 0x80L
) != 0L)
469 && ((dst
& 0x80L
) != 0L))
476 if ((res
& 0xFFL
) == 0L)
480 if (((src
& 0x80L
) != 0L)
481 && ((dst
& 0x80L
) != 0L))
485 if ((dst
& 0x80L
) != 0L
486 || (src
& 0x80L
) != 0L)
493 if ((res
& 0x8000L
) != 0L)
496 if (((src
& 0x8000L
) == 0L)
497 && ((dst
& 0x8000L
) == 0L))
501 else if (((src
& 0x8000L
) != 0L)
502 && ((dst
& 0x8000L
) != 0L))
509 if ((res
& 0xFFFFL
) == 0L)
513 if (((src
& 0x8000L
) != 0L)
514 && ((dst
& 0x8000L
) != 0L))
518 if ((dst
& 0x8000L
) != 0L
519 || (src
& 0x8000L
) != 0L)
526 if ((res
& 0x80000000L
) != 0L)
529 if (((src
& 0x80000000L
) == 0L)
530 && ((dst
& 0x80000000L
) == 0L))
534 else if (((src
& 0x80000000L
) != 0L) &&
535 ((dst
& 0x80000000L
) != 0L))
544 if (((src
& 0x80000000L
) != 0L)
545 && ((dst
& 0x80000000L
) != 0L))
547 if ((dst
& 0x80000000L
) != 0L
548 || (src
& 0x80000000L
) != 0L)
556 if (env
->cc_op
== CC_OP_SUB
557 || env
->cc_op
== CC_OP_CMP
) {
560 evaluate_flags_writeback(flags
);
563 void helper_top_evaluate_flags(void)
568 helper_evaluate_flags_mcp();
571 helper_evaluate_flags_muls();
574 helper_evaluate_flags_mulu();
583 switch (env
->cc_size
)
586 helper_evaluate_flags_move_4();
589 helper_evaluate_flags_move_2();
592 helper_evaluate_flags();
601 switch (env
->cc_size
)
604 helper_evaluate_flags_alu_4();
607 helper_evaluate_flags();