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/>.
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 void tlb_fill(CPUMBState *env, target_ulong addr, int is_write, int mmu_idx,
50 ret = cpu_mb_handle_mmu_fault(env, addr, is_write, mmu_idx);
53 /* now we have a real cpu fault */
54 tb = tb_find_pc(retaddr);
56 /* the PC is inside the translated code. It means that we have
57 a virtual CPU fault */
58 cpu_restore_state(tb, env, retaddr);
66 void helper_put(uint32_t id, uint32_t ctrl, uint32_t data)
68 int test = ctrl & STREAM_TEST;
69 int atomic = ctrl & STREAM_ATOMIC;
70 int control = ctrl & STREAM_CONTROL;
71 int nonblock = ctrl & STREAM_NONBLOCK;
72 int exception = ctrl & STREAM_EXCEPTION;
74 qemu_log("Unhandled stream put to stream-id=%d data=%x %s%s%s%s%s\n",
83 uint32_t helper_get(uint32_t id, uint32_t ctrl)
85 int test = ctrl & STREAM_TEST;
86 int atomic = ctrl & STREAM_ATOMIC;
87 int control = ctrl & STREAM_CONTROL;
88 int nonblock = ctrl & STREAM_NONBLOCK;
89 int exception = ctrl & STREAM_EXCEPTION;
91 qemu_log("Unhandled stream get from stream-id=%d %s%s%s%s%s\n",
98 return 0xdead0000 | id;
101 void helper_raise_exception(CPUMBState *env, uint32_t index)
103 env->exception_index = index;
107 void helper_debug(CPUMBState *env)
111 qemu_log("PC=%8.8x\n", env->sregs[SR_PC]);
112 qemu_log("rmsr=%x resr=%x rear=%x debug[%x] imm=%x iflags=%x\n",
113 env->sregs[SR_MSR], env->sregs[SR_ESR], env->sregs[SR_EAR],
114 env->debug, env->imm, env->iflags);
115 qemu_log("btaken=%d btarget=%x mode=%s(saved=%s) eip=%d ie=%d\n",
116 env->btaken, env->btarget,
117 (env->sregs[SR_MSR] & MSR_UM) ? "user" : "kernel",
118 (env->sregs[SR_MSR] & MSR_UMS) ? "user" : "kernel",
119 (env->sregs[SR_MSR] & MSR_EIP),
120 (env->sregs[SR_MSR] & MSR_IE));
121 for (i = 0; i < 32; i++) {
122 qemu_log("r%2.2d=%8.8x ", i, env->regs[i]);
123 if ((i + 1) % 4 == 0)
129 static inline uint32_t compute_carry(uint32_t a, uint32_t b, uint32_t cin)
133 if ((b == ~0) && cin)
135 else if ((~0 - a) < (b + cin))
140 uint32_t helper_cmp(uint32_t a, uint32_t b)
145 if ((b & 0x80000000) ^ (a & 0x80000000))
146 t = (t & 0x7fffffff) | (b & 0x80000000);
150 uint32_t helper_cmpu(uint32_t a, uint32_t b)
155 if ((b & 0x80000000) ^ (a & 0x80000000))
156 t = (t & 0x7fffffff) | (a & 0x80000000);
160 uint32_t helper_clz(uint32_t t0)
165 uint32_t helper_carry(uint32_t a, uint32_t b, uint32_t cf)
168 ncf = compute_carry(a, b, cf);
172 static inline int div_prepare(CPUMBState *env, uint32_t a, uint32_t b)
175 env->sregs[SR_MSR] |= MSR_DZ;
177 if ((env->sregs[SR_MSR] & MSR_EE)
178 && !(env->pvr.regs[2] & PVR2_DIV_ZERO_EXC_MASK)) {
179 env->sregs[SR_ESR] = ESR_EC_DIVZERO;
180 helper_raise_exception(env, EXCP_HW_EXCP);
184 env->sregs[SR_MSR] &= ~MSR_DZ;
188 uint32_t helper_divs(CPUMBState *env, uint32_t a, uint32_t b)
190 if (!div_prepare(env, a, b)) {
193 return (int32_t)a / (int32_t)b;
196 uint32_t helper_divu(CPUMBState *env, uint32_t a, uint32_t b)
198 if (!div_prepare(env, a, b)) {
204 /* raise FPU exception. */
205 static void raise_fpu_exception(CPUMBState *env)
207 env->sregs[SR_ESR] = ESR_EC_FPU;
208 helper_raise_exception(env, EXCP_HW_EXCP);
211 static void update_fpu_flags(CPUMBState *env, int flags)
215 if (flags & float_flag_invalid) {
216 env->sregs[SR_FSR] |= FSR_IO;
219 if (flags & float_flag_divbyzero) {
220 env->sregs[SR_FSR] |= FSR_DZ;
223 if (flags & float_flag_overflow) {
224 env->sregs[SR_FSR] |= FSR_OF;
227 if (flags & float_flag_underflow) {
228 env->sregs[SR_FSR] |= FSR_UF;
232 && (env->pvr.regs[2] & PVR2_FPU_EXC_MASK)
233 && (env->sregs[SR_MSR] & MSR_EE)) {
234 raise_fpu_exception(env);
238 uint32_t helper_fadd(CPUMBState *env, uint32_t a, uint32_t b)
240 CPU_FloatU fd, fa, fb;
243 set_float_exception_flags(0, &env->fp_status);
246 fd.f = float32_add(fa.f, fb.f, &env->fp_status);
248 flags = get_float_exception_flags(&env->fp_status);
249 update_fpu_flags(env, flags);
253 uint32_t helper_frsub(CPUMBState *env, uint32_t a, uint32_t b)
255 CPU_FloatU fd, fa, fb;
258 set_float_exception_flags(0, &env->fp_status);
261 fd.f = float32_sub(fb.f, fa.f, &env->fp_status);
262 flags = get_float_exception_flags(&env->fp_status);
263 update_fpu_flags(env, flags);
267 uint32_t helper_fmul(CPUMBState *env, uint32_t a, uint32_t b)
269 CPU_FloatU fd, fa, fb;
272 set_float_exception_flags(0, &env->fp_status);
275 fd.f = float32_mul(fa.f, fb.f, &env->fp_status);
276 flags = get_float_exception_flags(&env->fp_status);
277 update_fpu_flags(env, flags);
282 uint32_t helper_fdiv(CPUMBState *env, uint32_t a, uint32_t b)
284 CPU_FloatU fd, fa, fb;
287 set_float_exception_flags(0, &env->fp_status);
290 fd.f = float32_div(fb.f, fa.f, &env->fp_status);
291 flags = get_float_exception_flags(&env->fp_status);
292 update_fpu_flags(env, flags);
297 uint32_t helper_fcmp_un(CPUMBState *env, uint32_t a, uint32_t b)
305 if (float32_is_signaling_nan(fa.f) || float32_is_signaling_nan(fb.f)) {
306 update_fpu_flags(env, float_flag_invalid);
310 if (float32_is_quiet_nan(fa.f) || float32_is_quiet_nan(fb.f)) {
317 uint32_t helper_fcmp_lt(CPUMBState *env, uint32_t a, uint32_t b)
323 set_float_exception_flags(0, &env->fp_status);
326 r = float32_lt(fb.f, fa.f, &env->fp_status);
327 flags = get_float_exception_flags(&env->fp_status);
328 update_fpu_flags(env, flags & float_flag_invalid);
333 uint32_t helper_fcmp_eq(CPUMBState *env, uint32_t a, uint32_t b)
339 set_float_exception_flags(0, &env->fp_status);
342 r = float32_eq_quiet(fa.f, fb.f, &env->fp_status);
343 flags = get_float_exception_flags(&env->fp_status);
344 update_fpu_flags(env, flags & float_flag_invalid);
349 uint32_t helper_fcmp_le(CPUMBState *env, uint32_t a, uint32_t b)
357 set_float_exception_flags(0, &env->fp_status);
358 r = float32_le(fa.f, fb.f, &env->fp_status);
359 flags = get_float_exception_flags(&env->fp_status);
360 update_fpu_flags(env, flags & float_flag_invalid);
366 uint32_t helper_fcmp_gt(CPUMBState *env, uint32_t a, uint32_t b)
373 set_float_exception_flags(0, &env->fp_status);
374 r = float32_lt(fa.f, fb.f, &env->fp_status);
375 flags = get_float_exception_flags(&env->fp_status);
376 update_fpu_flags(env, flags & float_flag_invalid);
380 uint32_t helper_fcmp_ne(CPUMBState *env, uint32_t a, uint32_t b)
387 set_float_exception_flags(0, &env->fp_status);
388 r = !float32_eq_quiet(fa.f, fb.f, &env->fp_status);
389 flags = get_float_exception_flags(&env->fp_status);
390 update_fpu_flags(env, flags & float_flag_invalid);
395 uint32_t helper_fcmp_ge(CPUMBState *env, uint32_t a, uint32_t b)
402 set_float_exception_flags(0, &env->fp_status);
403 r = !float32_lt(fa.f, fb.f, &env->fp_status);
404 flags = get_float_exception_flags(&env->fp_status);
405 update_fpu_flags(env, flags & float_flag_invalid);
410 uint32_t helper_flt(CPUMBState *env, uint32_t a)
415 fd.f = int32_to_float32(fa.l, &env->fp_status);
419 uint32_t helper_fint(CPUMBState *env, uint32_t a)
425 set_float_exception_flags(0, &env->fp_status);
427 r = float32_to_int32(fa.f, &env->fp_status);
428 flags = get_float_exception_flags(&env->fp_status);
429 update_fpu_flags(env, flags);
434 uint32_t helper_fsqrt(CPUMBState *env, uint32_t a)
439 set_float_exception_flags(0, &env->fp_status);
441 fd.l = float32_sqrt(fa.f, &env->fp_status);
442 flags = get_float_exception_flags(&env->fp_status);
443 update_fpu_flags(env, flags);
448 uint32_t helper_pcmpbf(uint32_t a, uint32_t b)
451 uint32_t mask = 0xff000000;
453 for (i = 0; i < 4; i++) {
454 if ((a & mask) == (b & mask))
461 void helper_memalign(CPUMBState *env, uint32_t addr, uint32_t dr, uint32_t wr,
465 qemu_log_mask(CPU_LOG_INT,
466 "unaligned access addr=%x mask=%x, wr=%d dr=r%d\n",
468 env->sregs[SR_EAR] = addr;
469 env->sregs[SR_ESR] = ESR_EC_UNALIGNED_DATA | (wr << 10) \
472 env->sregs[SR_ESR] |= 1 << 11;
474 if (!(env->sregs[SR_MSR] & MSR_EE)) {
477 helper_raise_exception(env, EXCP_HW_EXCP);
481 void helper_stackprot(CPUMBState *env, uint32_t addr)
483 if (addr < env->slr || addr > env->shr) {
484 qemu_log("Stack protector violation at %x %x %x\n",
485 addr, env->slr, env->shr);
486 env->sregs[SR_EAR] = addr;
487 env->sregs[SR_ESR] = ESR_EC_STACKPROT;
488 helper_raise_exception(env, EXCP_HW_EXCP);
492 #if !defined(CONFIG_USER_ONLY)
493 /* Writes/reads to the MMU's special regs end up here. */
494 uint32_t helper_mmu_read(CPUMBState *env, uint32_t rn)
496 return mmu_read(env, rn);
499 void helper_mmu_write(CPUMBState *env, uint32_t rn, uint32_t v)
501 mmu_write(env, rn, v);
504 void cpu_unassigned_access(CPUMBState *env, target_phys_addr_t addr,
505 int is_write, int is_exec, int is_asi, int size)
507 qemu_log_mask(CPU_LOG_INT, "Unassigned " TARGET_FMT_plx " wr=%d exe=%d\n",
508 addr, is_write, is_exec);
509 if (!(env->sregs[SR_MSR] & MSR_EE)) {
513 env->sregs[SR_EAR] = addr;
515 if ((env->pvr.regs[2] & PVR2_IOPB_BUS_EXC_MASK)) {
516 env->sregs[SR_ESR] = ESR_EC_INSN_BUS;
517 helper_raise_exception(env, EXCP_HW_EXCP);
520 if ((env->pvr.regs[2] & PVR2_DOPB_BUS_EXC_MASK)) {
521 env->sregs[SR_ESR] = ESR_EC_DATA_BUS;
522 helper_raise_exception(env, EXCP_HW_EXCP);