2 * Microblaze helper routines.
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 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/>.
22 #include "dyngen-exec.h"
24 #include "host-utils.h"
28 #if !defined(CONFIG_USER_ONLY)
29 #include "softmmu_exec.h"
31 #define MMUSUFFIX _mmu
33 #include "softmmu_template.h"
35 #include "softmmu_template.h"
37 #include "softmmu_template.h"
39 #include "softmmu_template.h"
41 /* Try to fill the TLB and return an exception if error. If retaddr is
42 NULL, it means that the function was called in C code (i.e. not
43 from generated code or from helper.c) */
44 /* XXX: fix it to restore all registers */
45 void tlb_fill (target_ulong addr, int is_write, int mmu_idx, void *retaddr)
52 /* XXX: hack to restore env in all cases, even if not called from
57 ret = cpu_mb_handle_mmu_fault(env, addr, is_write, mmu_idx, 1);
60 /* now we have a real cpu fault */
61 pc = (unsigned long)retaddr;
64 /* the PC is inside the translated code. It means that we have
65 a virtual CPU fault */
66 cpu_restore_state(tb, env, pc);
75 void helper_put(uint32_t id, uint32_t ctrl, uint32_t data)
77 int test = ctrl & STREAM_TEST;
78 int atomic = ctrl & STREAM_ATOMIC;
79 int control = ctrl & STREAM_CONTROL;
80 int nonblock = ctrl & STREAM_NONBLOCK;
81 int exception = ctrl & STREAM_EXCEPTION;
83 qemu_log("Unhandled stream put to stream-id=%d data=%x %s%s%s%s%s\n",
92 uint32_t helper_get(uint32_t id, uint32_t ctrl)
94 int test = ctrl & STREAM_TEST;
95 int atomic = ctrl & STREAM_ATOMIC;
96 int control = ctrl & STREAM_CONTROL;
97 int nonblock = ctrl & STREAM_NONBLOCK;
98 int exception = ctrl & STREAM_EXCEPTION;
100 qemu_log("Unhandled stream get from stream-id=%d %s%s%s%s%s\n",
104 exception ? "e" : "",
107 return 0xdead0000 | id;
110 void helper_raise_exception(uint32_t index)
112 env->exception_index = index;
116 void helper_debug(void)
120 qemu_log("PC=%8.8x\n", env->sregs[SR_PC]);
121 qemu_log("rmsr=%x resr=%x rear=%x debug[%x] imm=%x iflags=%x\n",
122 env->sregs[SR_MSR], env->sregs[SR_ESR], env->sregs[SR_EAR],
123 env->debug, env->imm, env->iflags);
124 qemu_log("btaken=%d btarget=%x mode=%s(saved=%s) eip=%d ie=%d\n",
125 env->btaken, env->btarget,
126 (env->sregs[SR_MSR] & MSR_UM) ? "user" : "kernel",
127 (env->sregs[SR_MSR] & MSR_UMS) ? "user" : "kernel",
128 (env->sregs[SR_MSR] & MSR_EIP),
129 (env->sregs[SR_MSR] & MSR_IE));
130 for (i = 0; i < 32; i++) {
131 qemu_log("r%2.2d=%8.8x ", i, env->regs[i]);
132 if ((i + 1) % 4 == 0)
138 static inline uint32_t compute_carry(uint32_t a, uint32_t b, uint32_t cin)
142 if ((b == ~0) && cin)
144 else if ((~0 - a) < (b + cin))
149 uint32_t helper_cmp(uint32_t a, uint32_t b)
154 if ((b & 0x80000000) ^ (a & 0x80000000))
155 t = (t & 0x7fffffff) | (b & 0x80000000);
159 uint32_t helper_cmpu(uint32_t a, uint32_t b)
164 if ((b & 0x80000000) ^ (a & 0x80000000))
165 t = (t & 0x7fffffff) | (a & 0x80000000);
169 uint32_t helper_carry(uint32_t a, uint32_t b, uint32_t cf)
172 ncf = compute_carry(a, b, cf);
176 static inline int div_prepare(uint32_t a, uint32_t b)
179 env->sregs[SR_MSR] |= MSR_DZ;
181 if ((env->sregs[SR_MSR] & MSR_EE)
182 && !(env->pvr.regs[2] & PVR2_DIV_ZERO_EXC_MASK)) {
183 env->sregs[SR_ESR] = ESR_EC_DIVZERO;
184 helper_raise_exception(EXCP_HW_EXCP);
188 env->sregs[SR_MSR] &= ~MSR_DZ;
192 uint32_t helper_divs(uint32_t a, uint32_t b)
194 if (!div_prepare(a, b))
196 return (int32_t)a / (int32_t)b;
199 uint32_t helper_divu(uint32_t a, uint32_t b)
201 if (!div_prepare(a, b))
206 /* raise FPU exception. */
207 static void raise_fpu_exception(void)
209 env->sregs[SR_ESR] = ESR_EC_FPU;
210 helper_raise_exception(EXCP_HW_EXCP);
213 static void update_fpu_flags(int flags)
217 if (flags & float_flag_invalid) {
218 env->sregs[SR_FSR] |= FSR_IO;
221 if (flags & float_flag_divbyzero) {
222 env->sregs[SR_FSR] |= FSR_DZ;
225 if (flags & float_flag_overflow) {
226 env->sregs[SR_FSR] |= FSR_OF;
229 if (flags & float_flag_underflow) {
230 env->sregs[SR_FSR] |= FSR_UF;
234 && (env->pvr.regs[2] & PVR2_FPU_EXC_MASK)
235 && (env->sregs[SR_MSR] & MSR_EE)) {
236 raise_fpu_exception();
240 uint32_t helper_fadd(uint32_t a, uint32_t b)
242 CPU_FloatU fd, fa, fb;
245 set_float_exception_flags(0, &env->fp_status);
248 fd.f = float32_add(fa.f, fb.f, &env->fp_status);
250 flags = get_float_exception_flags(&env->fp_status);
251 update_fpu_flags(flags);
255 uint32_t helper_frsub(uint32_t a, uint32_t b)
257 CPU_FloatU fd, fa, fb;
260 set_float_exception_flags(0, &env->fp_status);
263 fd.f = float32_sub(fb.f, fa.f, &env->fp_status);
264 flags = get_float_exception_flags(&env->fp_status);
265 update_fpu_flags(flags);
269 uint32_t helper_fmul(uint32_t a, uint32_t b)
271 CPU_FloatU fd, fa, fb;
274 set_float_exception_flags(0, &env->fp_status);
277 fd.f = float32_mul(fa.f, fb.f, &env->fp_status);
278 flags = get_float_exception_flags(&env->fp_status);
279 update_fpu_flags(flags);
284 uint32_t helper_fdiv(uint32_t a, uint32_t b)
286 CPU_FloatU fd, fa, fb;
289 set_float_exception_flags(0, &env->fp_status);
292 fd.f = float32_div(fb.f, fa.f, &env->fp_status);
293 flags = get_float_exception_flags(&env->fp_status);
294 update_fpu_flags(flags);
299 uint32_t helper_fcmp_un(uint32_t a, uint32_t b)
307 if (float32_is_signaling_nan(fa.f) || float32_is_signaling_nan(fb.f)) {
308 update_fpu_flags(float_flag_invalid);
312 if (float32_is_quiet_nan(fa.f) || float32_is_quiet_nan(fb.f)) {
319 uint32_t helper_fcmp_lt(uint32_t a, uint32_t b)
325 set_float_exception_flags(0, &env->fp_status);
328 r = float32_lt(fb.f, fa.f, &env->fp_status);
329 flags = get_float_exception_flags(&env->fp_status);
330 update_fpu_flags(flags & float_flag_invalid);
335 uint32_t helper_fcmp_eq(uint32_t a, uint32_t b)
341 set_float_exception_flags(0, &env->fp_status);
344 r = float32_eq_quiet(fa.f, fb.f, &env->fp_status);
345 flags = get_float_exception_flags(&env->fp_status);
346 update_fpu_flags(flags & float_flag_invalid);
351 uint32_t helper_fcmp_le(uint32_t a, uint32_t b)
359 set_float_exception_flags(0, &env->fp_status);
360 r = float32_le(fa.f, fb.f, &env->fp_status);
361 flags = get_float_exception_flags(&env->fp_status);
362 update_fpu_flags(flags & float_flag_invalid);
368 uint32_t helper_fcmp_gt(uint32_t a, uint32_t b)
375 set_float_exception_flags(0, &env->fp_status);
376 r = float32_lt(fa.f, fb.f, &env->fp_status);
377 flags = get_float_exception_flags(&env->fp_status);
378 update_fpu_flags(flags & float_flag_invalid);
382 uint32_t helper_fcmp_ne(uint32_t a, uint32_t b)
389 set_float_exception_flags(0, &env->fp_status);
390 r = !float32_eq_quiet(fa.f, fb.f, &env->fp_status);
391 flags = get_float_exception_flags(&env->fp_status);
392 update_fpu_flags(flags & float_flag_invalid);
397 uint32_t helper_fcmp_ge(uint32_t a, uint32_t b)
404 set_float_exception_flags(0, &env->fp_status);
405 r = !float32_lt(fa.f, fb.f, &env->fp_status);
406 flags = get_float_exception_flags(&env->fp_status);
407 update_fpu_flags(flags & float_flag_invalid);
412 uint32_t helper_flt(uint32_t a)
417 fd.f = int32_to_float32(fa.l, &env->fp_status);
421 uint32_t helper_fint(uint32_t a)
427 set_float_exception_flags(0, &env->fp_status);
429 r = float32_to_int32(fa.f, &env->fp_status);
430 flags = get_float_exception_flags(&env->fp_status);
431 update_fpu_flags(flags);
436 uint32_t helper_fsqrt(uint32_t a)
441 set_float_exception_flags(0, &env->fp_status);
443 fd.l = float32_sqrt(fa.f, &env->fp_status);
444 flags = get_float_exception_flags(&env->fp_status);
445 update_fpu_flags(flags);
450 uint32_t helper_pcmpbf(uint32_t a, uint32_t b)
453 uint32_t mask = 0xff000000;
455 for (i = 0; i < 4; i++) {
456 if ((a & mask) == (b & mask))
463 void helper_memalign(uint32_t addr, uint32_t dr, uint32_t wr, uint32_t mask)
466 qemu_log_mask(CPU_LOG_INT,
467 "unaligned access addr=%x mask=%x, wr=%d dr=r%d\n",
469 env->sregs[SR_EAR] = addr;
470 env->sregs[SR_ESR] = ESR_EC_UNALIGNED_DATA | (wr << 10) \
473 env->sregs[SR_ESR] |= 1 << 11;
475 if (!(env->sregs[SR_MSR] & MSR_EE)) {
478 helper_raise_exception(EXCP_HW_EXCP);
482 #if !defined(CONFIG_USER_ONLY)
483 /* Writes/reads to the MMU's special regs end up here. */
484 uint32_t helper_mmu_read(uint32_t rn)
486 return mmu_read(env, rn);
489 void helper_mmu_write(uint32_t rn, uint32_t v)
491 mmu_write(env, rn, v);
494 void cpu_unassigned_access(CPUState *env1, target_phys_addr_t addr,
495 int is_write, int is_exec, int is_asi, int size)
502 qemu_log_mask(CPU_LOG_INT, "Unassigned " TARGET_FMT_plx " wr=%d exe=%d\n",
503 addr, is_write, is_exec);
504 if (!(env->sregs[SR_MSR] & MSR_EE)) {
509 env->sregs[SR_EAR] = addr;
511 if ((env->pvr.regs[2] & PVR2_IOPB_BUS_EXC_MASK)) {
512 env->sregs[SR_ESR] = ESR_EC_INSN_BUS;
513 helper_raise_exception(EXCP_HW_EXCP);
516 if ((env->pvr.regs[2] & PVR2_DOPB_BUS_EXC_MASK)) {
517 env->sregs[SR_ESR] = ESR_EC_DATA_BUS;
518 helper_raise_exception(EXCP_HW_EXCP);