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/>.
22 #include "exec/helper-proto.h"
23 #include "qemu/host-utils.h"
24 #include "exec/cpu_ldst.h"
28 #if !defined(CONFIG_USER_ONLY)
30 /* Try to fill the TLB and return an exception if error. If retaddr is
31 * NULL, it means that the function was called in C code (i.e. not
32 * from generated code or from helper.c)
34 void tlb_fill(CPUState *cs, target_ulong addr, int is_write, int mmu_idx,
39 ret = mb_cpu_handle_mmu_fault(cs, addr, is_write, mmu_idx);
42 /* now we have a real cpu fault */
43 cpu_restore_state(cs, retaddr);
50 void helper_put(uint32_t id, uint32_t ctrl, uint32_t data)
52 int test = ctrl & STREAM_TEST;
53 int atomic = ctrl & STREAM_ATOMIC;
54 int control = ctrl & STREAM_CONTROL;
55 int nonblock = ctrl & STREAM_NONBLOCK;
56 int exception = ctrl & STREAM_EXCEPTION;
58 qemu_log("Unhandled stream put to stream-id=%d data=%x %s%s%s%s%s\n",
67 uint32_t helper_get(uint32_t id, uint32_t ctrl)
69 int test = ctrl & STREAM_TEST;
70 int atomic = ctrl & STREAM_ATOMIC;
71 int control = ctrl & STREAM_CONTROL;
72 int nonblock = ctrl & STREAM_NONBLOCK;
73 int exception = ctrl & STREAM_EXCEPTION;
75 qemu_log("Unhandled stream get from stream-id=%d %s%s%s%s%s\n",
82 return 0xdead0000 | id;
85 void helper_raise_exception(CPUMBState *env, uint32_t index)
87 CPUState *cs = CPU(mb_env_get_cpu(env));
89 cs->exception_index = index;
93 void helper_debug(CPUMBState *env)
97 qemu_log("PC=%8.8x\n", env->sregs[SR_PC]);
98 qemu_log("rmsr=%x resr=%x rear=%x debug[%x] imm=%x iflags=%x\n",
99 env->sregs[SR_MSR], env->sregs[SR_ESR], env->sregs[SR_EAR],
100 env->debug, env->imm, env->iflags);
101 qemu_log("btaken=%d btarget=%x mode=%s(saved=%s) eip=%d ie=%d\n",
102 env->btaken, env->btarget,
103 (env->sregs[SR_MSR] & MSR_UM) ? "user" : "kernel",
104 (env->sregs[SR_MSR] & MSR_UMS) ? "user" : "kernel",
105 (env->sregs[SR_MSR] & MSR_EIP),
106 (env->sregs[SR_MSR] & MSR_IE));
107 for (i = 0; i < 32; i++) {
108 qemu_log("r%2.2d=%8.8x ", i, env->regs[i]);
109 if ((i + 1) % 4 == 0)
115 static inline uint32_t compute_carry(uint32_t a, uint32_t b, uint32_t cin)
119 if ((b == ~0) && cin)
121 else if ((~0 - a) < (b + cin))
126 uint32_t helper_cmp(uint32_t a, uint32_t b)
131 if ((b & 0x80000000) ^ (a & 0x80000000))
132 t = (t & 0x7fffffff) | (b & 0x80000000);
136 uint32_t helper_cmpu(uint32_t a, uint32_t b)
141 if ((b & 0x80000000) ^ (a & 0x80000000))
142 t = (t & 0x7fffffff) | (a & 0x80000000);
146 uint32_t helper_clz(uint32_t t0)
151 uint32_t helper_carry(uint32_t a, uint32_t b, uint32_t cf)
153 return compute_carry(a, b, cf);
156 static inline int div_prepare(CPUMBState *env, uint32_t a, uint32_t b)
159 env->sregs[SR_MSR] |= MSR_DZ;
161 if ((env->sregs[SR_MSR] & MSR_EE)
162 && !(env->pvr.regs[2] & PVR2_DIV_ZERO_EXC_MASK)) {
163 env->sregs[SR_ESR] = ESR_EC_DIVZERO;
164 helper_raise_exception(env, EXCP_HW_EXCP);
168 env->sregs[SR_MSR] &= ~MSR_DZ;
172 uint32_t helper_divs(CPUMBState *env, uint32_t a, uint32_t b)
174 if (!div_prepare(env, a, b)) {
177 return (int32_t)a / (int32_t)b;
180 uint32_t helper_divu(CPUMBState *env, uint32_t a, uint32_t b)
182 if (!div_prepare(env, a, b)) {
188 /* raise FPU exception. */
189 static void raise_fpu_exception(CPUMBState *env)
191 env->sregs[SR_ESR] = ESR_EC_FPU;
192 helper_raise_exception(env, EXCP_HW_EXCP);
195 static void update_fpu_flags(CPUMBState *env, int flags)
199 if (flags & float_flag_invalid) {
200 env->sregs[SR_FSR] |= FSR_IO;
203 if (flags & float_flag_divbyzero) {
204 env->sregs[SR_FSR] |= FSR_DZ;
207 if (flags & float_flag_overflow) {
208 env->sregs[SR_FSR] |= FSR_OF;
211 if (flags & float_flag_underflow) {
212 env->sregs[SR_FSR] |= FSR_UF;
216 && (env->pvr.regs[2] & PVR2_FPU_EXC_MASK)
217 && (env->sregs[SR_MSR] & MSR_EE)) {
218 raise_fpu_exception(env);
222 uint32_t helper_fadd(CPUMBState *env, uint32_t a, uint32_t b)
224 CPU_FloatU fd, fa, fb;
227 set_float_exception_flags(0, &env->fp_status);
230 fd.f = float32_add(fa.f, fb.f, &env->fp_status);
232 flags = get_float_exception_flags(&env->fp_status);
233 update_fpu_flags(env, flags);
237 uint32_t helper_frsub(CPUMBState *env, uint32_t a, uint32_t b)
239 CPU_FloatU fd, fa, fb;
242 set_float_exception_flags(0, &env->fp_status);
245 fd.f = float32_sub(fb.f, fa.f, &env->fp_status);
246 flags = get_float_exception_flags(&env->fp_status);
247 update_fpu_flags(env, flags);
251 uint32_t helper_fmul(CPUMBState *env, uint32_t a, uint32_t b)
253 CPU_FloatU fd, fa, fb;
256 set_float_exception_flags(0, &env->fp_status);
259 fd.f = float32_mul(fa.f, fb.f, &env->fp_status);
260 flags = get_float_exception_flags(&env->fp_status);
261 update_fpu_flags(env, flags);
266 uint32_t helper_fdiv(CPUMBState *env, uint32_t a, uint32_t b)
268 CPU_FloatU fd, fa, fb;
271 set_float_exception_flags(0, &env->fp_status);
274 fd.f = float32_div(fb.f, fa.f, &env->fp_status);
275 flags = get_float_exception_flags(&env->fp_status);
276 update_fpu_flags(env, flags);
281 uint32_t helper_fcmp_un(CPUMBState *env, uint32_t a, uint32_t b)
289 if (float32_is_signaling_nan(fa.f) || float32_is_signaling_nan(fb.f)) {
290 update_fpu_flags(env, float_flag_invalid);
294 if (float32_is_quiet_nan(fa.f) || float32_is_quiet_nan(fb.f)) {
301 uint32_t helper_fcmp_lt(CPUMBState *env, uint32_t a, uint32_t b)
307 set_float_exception_flags(0, &env->fp_status);
310 r = float32_lt(fb.f, fa.f, &env->fp_status);
311 flags = get_float_exception_flags(&env->fp_status);
312 update_fpu_flags(env, flags & float_flag_invalid);
317 uint32_t helper_fcmp_eq(CPUMBState *env, uint32_t a, uint32_t b)
323 set_float_exception_flags(0, &env->fp_status);
326 r = float32_eq_quiet(fa.f, fb.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_le(CPUMBState *env, uint32_t a, uint32_t b)
341 set_float_exception_flags(0, &env->fp_status);
342 r = float32_le(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);
350 uint32_t helper_fcmp_gt(CPUMBState *env, uint32_t a, uint32_t b)
357 set_float_exception_flags(0, &env->fp_status);
358 r = float32_lt(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);
364 uint32_t helper_fcmp_ne(CPUMBState *env, uint32_t a, uint32_t b)
371 set_float_exception_flags(0, &env->fp_status);
372 r = !float32_eq_quiet(fa.f, fb.f, &env->fp_status);
373 flags = get_float_exception_flags(&env->fp_status);
374 update_fpu_flags(env, flags & float_flag_invalid);
379 uint32_t helper_fcmp_ge(CPUMBState *env, uint32_t a, uint32_t b)
386 set_float_exception_flags(0, &env->fp_status);
387 r = !float32_lt(fa.f, fb.f, &env->fp_status);
388 flags = get_float_exception_flags(&env->fp_status);
389 update_fpu_flags(env, flags & float_flag_invalid);
394 uint32_t helper_flt(CPUMBState *env, uint32_t a)
399 fd.f = int32_to_float32(fa.l, &env->fp_status);
403 uint32_t helper_fint(CPUMBState *env, uint32_t a)
409 set_float_exception_flags(0, &env->fp_status);
411 r = float32_to_int32(fa.f, &env->fp_status);
412 flags = get_float_exception_flags(&env->fp_status);
413 update_fpu_flags(env, flags);
418 uint32_t helper_fsqrt(CPUMBState *env, uint32_t a)
423 set_float_exception_flags(0, &env->fp_status);
425 fd.l = float32_sqrt(fa.f, &env->fp_status);
426 flags = get_float_exception_flags(&env->fp_status);
427 update_fpu_flags(env, flags);
432 uint32_t helper_pcmpbf(uint32_t a, uint32_t b)
435 uint32_t mask = 0xff000000;
437 for (i = 0; i < 4; i++) {
438 if ((a & mask) == (b & mask))
445 void helper_memalign(CPUMBState *env, uint32_t addr, uint32_t dr, uint32_t wr,
449 qemu_log_mask(CPU_LOG_INT,
450 "unaligned access addr=%x mask=%x, wr=%d dr=r%d\n",
452 env->sregs[SR_EAR] = addr;
453 env->sregs[SR_ESR] = ESR_EC_UNALIGNED_DATA | (wr << 10) \
456 env->sregs[SR_ESR] |= 1 << 11;
458 if (!(env->sregs[SR_MSR] & MSR_EE)) {
461 helper_raise_exception(env, EXCP_HW_EXCP);
465 void helper_stackprot(CPUMBState *env, uint32_t addr)
467 if (addr < env->slr || addr > env->shr) {
468 qemu_log("Stack protector violation at %x %x %x\n",
469 addr, env->slr, env->shr);
470 env->sregs[SR_EAR] = addr;
471 env->sregs[SR_ESR] = ESR_EC_STACKPROT;
472 helper_raise_exception(env, EXCP_HW_EXCP);
476 #if !defined(CONFIG_USER_ONLY)
477 /* Writes/reads to the MMU's special regs end up here. */
478 uint32_t helper_mmu_read(CPUMBState *env, uint32_t rn)
480 return mmu_read(env, rn);
483 void helper_mmu_write(CPUMBState *env, uint32_t rn, uint32_t v)
485 mmu_write(env, rn, v);
488 void mb_cpu_unassigned_access(CPUState *cs, hwaddr addr,
489 bool is_write, bool is_exec, int is_asi,
495 qemu_log_mask(CPU_LOG_INT, "Unassigned " TARGET_FMT_plx " wr=%d exe=%d\n",
496 addr, is_write ? 1 : 0, is_exec ? 1 : 0);
500 cpu = MICROBLAZE_CPU(cs);
502 if (!(env->sregs[SR_MSR] & MSR_EE)) {
506 env->sregs[SR_EAR] = addr;
508 if ((env->pvr.regs[2] & PVR2_IOPB_BUS_EXC_MASK)) {
509 env->sregs[SR_ESR] = ESR_EC_INSN_BUS;
510 helper_raise_exception(env, EXCP_HW_EXCP);
513 if ((env->pvr.regs[2] & PVR2_DOPB_BUS_EXC_MASK)) {
514 env->sregs[SR_ESR] = ESR_EC_DATA_BUS;
515 helper_raise_exception(env, EXCP_HW_EXCP);