2 * Microblaze helper routines.
5 * Copyright (c) 2009-2012 PetaLogix Qld Pty Ltd.
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, see <http://www.gnu.org/licenses/>.
23 #include "dyngen-exec.h"
25 #include "host-utils.h"
29 #if !defined(CONFIG_USER_ONLY)
30 #include "softmmu_exec.h"
32 #define MMUSUFFIX _mmu
34 #include "softmmu_template.h"
36 #include "softmmu_template.h"
38 #include "softmmu_template.h"
40 #include "softmmu_template.h"
42 /* Try to fill the TLB and return an exception if error. If retaddr is
43 NULL, it means that the function was called in C code (i.e. not
44 from generated code or from helper.c) */
45 /* XXX: fix it to restore all registers */
46 void tlb_fill(CPUMBState *env1, target_ulong addr, int is_write, int mmu_idx,
50 CPUMBState *saved_env;
56 ret = cpu_mb_handle_mmu_fault(env, addr, is_write, mmu_idx);
59 /* now we have a real cpu fault */
60 tb = tb_find_pc(retaddr);
62 /* the PC is inside the translated code. It means that we have
63 a virtual CPU fault */
64 cpu_restore_state(tb, env, retaddr);
73 void helper_put(uint32_t id, uint32_t ctrl, uint32_t data)
75 int test = ctrl & STREAM_TEST;
76 int atomic = ctrl & STREAM_ATOMIC;
77 int control = ctrl & STREAM_CONTROL;
78 int nonblock = ctrl & STREAM_NONBLOCK;
79 int exception = ctrl & STREAM_EXCEPTION;
81 qemu_log("Unhandled stream put to stream-id=%d data=%x %s%s%s%s%s\n",
90 uint32_t helper_get(uint32_t id, uint32_t ctrl)
92 int test = ctrl & STREAM_TEST;
93 int atomic = ctrl & STREAM_ATOMIC;
94 int control = ctrl & STREAM_CONTROL;
95 int nonblock = ctrl & STREAM_NONBLOCK;
96 int exception = ctrl & STREAM_EXCEPTION;
98 qemu_log("Unhandled stream get from stream-id=%d %s%s%s%s%s\n",
102 exception ? "e" : "",
105 return 0xdead0000 | id;
108 void helper_raise_exception(uint32_t index)
110 env->exception_index = index;
114 void helper_debug(void)
118 qemu_log("PC=%8.8x\n", env->sregs[SR_PC]);
119 qemu_log("rmsr=%x resr=%x rear=%x debug[%x] imm=%x iflags=%x\n",
120 env->sregs[SR_MSR], env->sregs[SR_ESR], env->sregs[SR_EAR],
121 env->debug, env->imm, env->iflags);
122 qemu_log("btaken=%d btarget=%x mode=%s(saved=%s) eip=%d ie=%d\n",
123 env->btaken, env->btarget,
124 (env->sregs[SR_MSR] & MSR_UM) ? "user" : "kernel",
125 (env->sregs[SR_MSR] & MSR_UMS) ? "user" : "kernel",
126 (env->sregs[SR_MSR] & MSR_EIP),
127 (env->sregs[SR_MSR] & MSR_IE));
128 for (i = 0; i < 32; i++) {
129 qemu_log("r%2.2d=%8.8x ", i, env->regs[i]);
130 if ((i + 1) % 4 == 0)
136 static inline uint32_t compute_carry(uint32_t a, uint32_t b, uint32_t cin)
140 if ((b == ~0) && cin)
142 else if ((~0 - a) < (b + cin))
147 uint32_t helper_cmp(uint32_t a, uint32_t b)
152 if ((b & 0x80000000) ^ (a & 0x80000000))
153 t = (t & 0x7fffffff) | (b & 0x80000000);
157 uint32_t helper_cmpu(uint32_t a, uint32_t b)
162 if ((b & 0x80000000) ^ (a & 0x80000000))
163 t = (t & 0x7fffffff) | (a & 0x80000000);
167 uint32_t helper_clz(uint32_t t0)
172 uint32_t helper_carry(uint32_t a, uint32_t b, uint32_t cf)
175 ncf = compute_carry(a, b, cf);
179 static inline int div_prepare(uint32_t a, uint32_t b)
182 env->sregs[SR_MSR] |= MSR_DZ;
184 if ((env->sregs[SR_MSR] & MSR_EE)
185 && !(env->pvr.regs[2] & PVR2_DIV_ZERO_EXC_MASK)) {
186 env->sregs[SR_ESR] = ESR_EC_DIVZERO;
187 helper_raise_exception(EXCP_HW_EXCP);
191 env->sregs[SR_MSR] &= ~MSR_DZ;
195 uint32_t helper_divs(uint32_t a, uint32_t b)
197 if (!div_prepare(a, b))
199 return (int32_t)a / (int32_t)b;
202 uint32_t helper_divu(uint32_t a, uint32_t b)
204 if (!div_prepare(a, b))
209 /* raise FPU exception. */
210 static void raise_fpu_exception(void)
212 env->sregs[SR_ESR] = ESR_EC_FPU;
213 helper_raise_exception(EXCP_HW_EXCP);
216 static void update_fpu_flags(int flags)
220 if (flags & float_flag_invalid) {
221 env->sregs[SR_FSR] |= FSR_IO;
224 if (flags & float_flag_divbyzero) {
225 env->sregs[SR_FSR] |= FSR_DZ;
228 if (flags & float_flag_overflow) {
229 env->sregs[SR_FSR] |= FSR_OF;
232 if (flags & float_flag_underflow) {
233 env->sregs[SR_FSR] |= FSR_UF;
237 && (env->pvr.regs[2] & PVR2_FPU_EXC_MASK)
238 && (env->sregs[SR_MSR] & MSR_EE)) {
239 raise_fpu_exception();
243 uint32_t helper_fadd(uint32_t a, uint32_t b)
245 CPU_FloatU fd, fa, fb;
248 set_float_exception_flags(0, &env->fp_status);
251 fd.f = float32_add(fa.f, fb.f, &env->fp_status);
253 flags = get_float_exception_flags(&env->fp_status);
254 update_fpu_flags(flags);
258 uint32_t helper_frsub(uint32_t a, uint32_t b)
260 CPU_FloatU fd, fa, fb;
263 set_float_exception_flags(0, &env->fp_status);
266 fd.f = float32_sub(fb.f, fa.f, &env->fp_status);
267 flags = get_float_exception_flags(&env->fp_status);
268 update_fpu_flags(flags);
272 uint32_t helper_fmul(uint32_t a, uint32_t b)
274 CPU_FloatU fd, fa, fb;
277 set_float_exception_flags(0, &env->fp_status);
280 fd.f = float32_mul(fa.f, fb.f, &env->fp_status);
281 flags = get_float_exception_flags(&env->fp_status);
282 update_fpu_flags(flags);
287 uint32_t helper_fdiv(uint32_t a, uint32_t b)
289 CPU_FloatU fd, fa, fb;
292 set_float_exception_flags(0, &env->fp_status);
295 fd.f = float32_div(fb.f, fa.f, &env->fp_status);
296 flags = get_float_exception_flags(&env->fp_status);
297 update_fpu_flags(flags);
302 uint32_t helper_fcmp_un(uint32_t a, uint32_t b)
310 if (float32_is_signaling_nan(fa.f) || float32_is_signaling_nan(fb.f)) {
311 update_fpu_flags(float_flag_invalid);
315 if (float32_is_quiet_nan(fa.f) || float32_is_quiet_nan(fb.f)) {
322 uint32_t helper_fcmp_lt(uint32_t a, uint32_t b)
328 set_float_exception_flags(0, &env->fp_status);
331 r = float32_lt(fb.f, fa.f, &env->fp_status);
332 flags = get_float_exception_flags(&env->fp_status);
333 update_fpu_flags(flags & float_flag_invalid);
338 uint32_t helper_fcmp_eq(uint32_t a, uint32_t b)
344 set_float_exception_flags(0, &env->fp_status);
347 r = float32_eq_quiet(fa.f, fb.f, &env->fp_status);
348 flags = get_float_exception_flags(&env->fp_status);
349 update_fpu_flags(flags & float_flag_invalid);
354 uint32_t helper_fcmp_le(uint32_t a, uint32_t b)
362 set_float_exception_flags(0, &env->fp_status);
363 r = float32_le(fa.f, fb.f, &env->fp_status);
364 flags = get_float_exception_flags(&env->fp_status);
365 update_fpu_flags(flags & float_flag_invalid);
371 uint32_t helper_fcmp_gt(uint32_t a, uint32_t b)
378 set_float_exception_flags(0, &env->fp_status);
379 r = float32_lt(fa.f, fb.f, &env->fp_status);
380 flags = get_float_exception_flags(&env->fp_status);
381 update_fpu_flags(flags & float_flag_invalid);
385 uint32_t helper_fcmp_ne(uint32_t a, uint32_t b)
392 set_float_exception_flags(0, &env->fp_status);
393 r = !float32_eq_quiet(fa.f, fb.f, &env->fp_status);
394 flags = get_float_exception_flags(&env->fp_status);
395 update_fpu_flags(flags & float_flag_invalid);
400 uint32_t helper_fcmp_ge(uint32_t a, uint32_t b)
407 set_float_exception_flags(0, &env->fp_status);
408 r = !float32_lt(fa.f, fb.f, &env->fp_status);
409 flags = get_float_exception_flags(&env->fp_status);
410 update_fpu_flags(flags & float_flag_invalid);
415 uint32_t helper_flt(uint32_t a)
420 fd.f = int32_to_float32(fa.l, &env->fp_status);
424 uint32_t helper_fint(uint32_t a)
430 set_float_exception_flags(0, &env->fp_status);
432 r = float32_to_int32(fa.f, &env->fp_status);
433 flags = get_float_exception_flags(&env->fp_status);
434 update_fpu_flags(flags);
439 uint32_t helper_fsqrt(uint32_t a)
444 set_float_exception_flags(0, &env->fp_status);
446 fd.l = float32_sqrt(fa.f, &env->fp_status);
447 flags = get_float_exception_flags(&env->fp_status);
448 update_fpu_flags(flags);
453 uint32_t helper_pcmpbf(uint32_t a, uint32_t b)
456 uint32_t mask = 0xff000000;
458 for (i = 0; i < 4; i++) {
459 if ((a & mask) == (b & mask))
466 void helper_memalign(uint32_t addr, uint32_t dr, uint32_t wr, uint32_t mask)
469 qemu_log_mask(CPU_LOG_INT,
470 "unaligned access addr=%x mask=%x, wr=%d dr=r%d\n",
472 env->sregs[SR_EAR] = addr;
473 env->sregs[SR_ESR] = ESR_EC_UNALIGNED_DATA | (wr << 10) \
476 env->sregs[SR_ESR] |= 1 << 11;
478 if (!(env->sregs[SR_MSR] & MSR_EE)) {
481 helper_raise_exception(EXCP_HW_EXCP);
485 void helper_stackprot(uint32_t addr)
487 if (addr < env->slr || addr > env->shr) {
488 qemu_log("Stack protector violation at %x %x %x\n",
489 addr, env->slr, env->shr);
490 env->sregs[SR_EAR] = addr;
491 env->sregs[SR_ESR] = ESR_EC_STACKPROT;
492 helper_raise_exception(EXCP_HW_EXCP);
496 #if !defined(CONFIG_USER_ONLY)
497 /* Writes/reads to the MMU's special regs end up here. */
498 uint32_t helper_mmu_read(uint32_t rn)
500 return mmu_read(env, rn);
503 void helper_mmu_write(uint32_t rn, uint32_t v)
505 mmu_write(env, rn, v);
508 void cpu_unassigned_access(CPUMBState *env1, target_phys_addr_t addr,
509 int is_write, int is_exec, int is_asi, int size)
511 CPUMBState *saved_env;
516 qemu_log_mask(CPU_LOG_INT, "Unassigned " TARGET_FMT_plx " wr=%d exe=%d\n",
517 addr, is_write, is_exec);
518 if (!(env->sregs[SR_MSR] & MSR_EE)) {
523 env->sregs[SR_EAR] = addr;
525 if ((env->pvr.regs[2] & PVR2_IOPB_BUS_EXC_MASK)) {
526 env->sregs[SR_ESR] = ESR_EC_INSN_BUS;
527 helper_raise_exception(EXCP_HW_EXCP);
530 if ((env->pvr.regs[2] & PVR2_DOPB_BUS_EXC_MASK)) {
531 env->sregs[SR_ESR] = ESR_EC_DATA_BUS;
532 helper_raise_exception(EXCP_HW_EXCP);