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/>.
23 #include "host-utils.h"
27 #if !defined(CONFIG_USER_ONLY)
28 #define MMUSUFFIX _mmu
30 #include "softmmu_template.h"
32 #include "softmmu_template.h"
34 #include "softmmu_template.h"
36 #include "softmmu_template.h"
38 /* Try to fill the TLB and return an exception if error. If retaddr is
39 NULL, it means that the function was called in C code (i.e. not
40 from generated code or from helper.c) */
41 /* XXX: fix it to restore all registers */
42 void tlb_fill (target_ulong addr, int is_write, int mmu_idx, void *retaddr)
49 /* XXX: hack to restore env in all cases, even if not called from
54 ret = cpu_mb_handle_mmu_fault(env, addr, is_write, mmu_idx, 1);
57 /* now we have a real cpu fault */
58 pc = (unsigned long)retaddr;
61 /* the PC is inside the translated code. It means that we have
62 a virtual CPU fault */
63 cpu_restore_state(tb, env, pc);
72 void helper_put(uint32_t id, uint32_t ctrl, uint32_t data)
74 int test = ctrl & STREAM_TEST;
75 int atomic = ctrl & STREAM_ATOMIC;
76 int control = ctrl & STREAM_CONTROL;
77 int nonblock = ctrl & STREAM_NONBLOCK;
78 int exception = ctrl & STREAM_EXCEPTION;
80 qemu_log("Unhandled stream put to stream-id=%d data=%x %s%s%s%s%s\n",
89 uint32_t helper_get(uint32_t id, uint32_t ctrl)
91 int test = ctrl & STREAM_TEST;
92 int atomic = ctrl & STREAM_ATOMIC;
93 int control = ctrl & STREAM_CONTROL;
94 int nonblock = ctrl & STREAM_NONBLOCK;
95 int exception = ctrl & STREAM_EXCEPTION;
97 qemu_log("Unhandled stream get from stream-id=%d %s%s%s%s%s\n",
101 exception ? "e" : "",
104 return 0xdead0000 | id;
107 void helper_raise_exception(uint32_t index)
109 env->exception_index = index;
113 void helper_debug(void)
117 qemu_log("PC=%8.8x\n", env->sregs[SR_PC]);
118 qemu_log("rmsr=%x resr=%x rear=%x debug[%x] imm=%x iflags=%x\n",
119 env->sregs[SR_MSR], env->sregs[SR_ESR], env->sregs[SR_EAR],
120 env->debug, env->imm, env->iflags);
121 qemu_log("btaken=%d btarget=%x mode=%s(saved=%s) eip=%d ie=%d\n",
122 env->btaken, env->btarget,
123 (env->sregs[SR_MSR] & MSR_UM) ? "user" : "kernel",
124 (env->sregs[SR_MSR] & MSR_UMS) ? "user" : "kernel",
125 (env->sregs[SR_MSR] & MSR_EIP),
126 (env->sregs[SR_MSR] & MSR_IE));
127 for (i = 0; i < 32; i++) {
128 qemu_log("r%2.2d=%8.8x ", i, env->regs[i]);
129 if ((i + 1) % 4 == 0)
135 static inline uint32_t compute_carry(uint32_t a, uint32_t b, uint32_t cin)
139 if ((b == ~0) && cin)
141 else if ((~0 - a) < (b + cin))
146 uint32_t helper_cmp(uint32_t a, uint32_t b)
151 if ((b & 0x80000000) ^ (a & 0x80000000))
152 t = (t & 0x7fffffff) | (b & 0x80000000);
156 uint32_t helper_cmpu(uint32_t a, uint32_t b)
161 if ((b & 0x80000000) ^ (a & 0x80000000))
162 t = (t & 0x7fffffff) | (a & 0x80000000);
166 uint32_t helper_carry(uint32_t a, uint32_t b, uint32_t cf)
169 ncf = compute_carry(a, b, cf);
173 static inline int div_prepare(uint32_t a, uint32_t b)
176 env->sregs[SR_MSR] |= MSR_DZ;
178 if ((env->sregs[SR_MSR] & MSR_EE)
179 && !(env->pvr.regs[2] & PVR2_DIV_ZERO_EXC_MASK)) {
180 env->sregs[SR_ESR] = ESR_EC_DIVZERO;
181 helper_raise_exception(EXCP_HW_EXCP);
185 env->sregs[SR_MSR] &= ~MSR_DZ;
189 uint32_t helper_divs(uint32_t a, uint32_t b)
191 if (!div_prepare(a, b))
193 return (int32_t)a / (int32_t)b;
196 uint32_t helper_divu(uint32_t a, uint32_t b)
198 if (!div_prepare(a, b))
203 /* raise FPU exception. */
204 static void raise_fpu_exception(void)
206 env->sregs[SR_ESR] = ESR_EC_FPU;
207 helper_raise_exception(EXCP_HW_EXCP);
210 static void update_fpu_flags(int flags)
214 if (flags & float_flag_invalid) {
215 env->sregs[SR_FSR] |= FSR_IO;
218 if (flags & float_flag_divbyzero) {
219 env->sregs[SR_FSR] |= FSR_DZ;
222 if (flags & float_flag_overflow) {
223 env->sregs[SR_FSR] |= FSR_OF;
226 if (flags & float_flag_underflow) {
227 env->sregs[SR_FSR] |= FSR_UF;
231 && (env->pvr.regs[2] & PVR2_FPU_EXC_MASK)
232 && (env->sregs[SR_MSR] & MSR_EE)) {
233 raise_fpu_exception();
237 uint32_t helper_fadd(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_add(fa.f, fb.f, &env->fp_status);
247 flags = get_float_exception_flags(&env->fp_status);
248 update_fpu_flags(flags);
252 uint32_t helper_frsub(uint32_t a, uint32_t b)
254 CPU_FloatU fd, fa, fb;
257 set_float_exception_flags(0, &env->fp_status);
260 fd.f = float32_sub(fb.f, fa.f, &env->fp_status);
261 flags = get_float_exception_flags(&env->fp_status);
262 update_fpu_flags(flags);
266 uint32_t helper_fmul(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_mul(fa.f, fb.f, &env->fp_status);
275 flags = get_float_exception_flags(&env->fp_status);
276 update_fpu_flags(flags);
281 uint32_t helper_fdiv(uint32_t a, uint32_t b)
283 CPU_FloatU fd, fa, fb;
286 set_float_exception_flags(0, &env->fp_status);
289 fd.f = float32_div(fb.f, fa.f, &env->fp_status);
290 flags = get_float_exception_flags(&env->fp_status);
291 update_fpu_flags(flags);
296 uint32_t helper_fcmp_un(uint32_t a, uint32_t b)
304 if (float32_is_signaling_nan(fa.f) || float32_is_signaling_nan(fb.f)) {
305 update_fpu_flags(float_flag_invalid);
309 if (float32_is_quiet_nan(fa.f) || float32_is_quiet_nan(fb.f)) {
316 uint32_t helper_fcmp_lt(uint32_t a, uint32_t b)
322 set_float_exception_flags(0, &env->fp_status);
325 r = float32_lt(fb.f, fa.f, &env->fp_status);
326 flags = get_float_exception_flags(&env->fp_status);
327 update_fpu_flags(flags & float_flag_invalid);
332 uint32_t helper_fcmp_eq(uint32_t a, uint32_t b)
338 set_float_exception_flags(0, &env->fp_status);
341 r = float32_eq_quiet(fa.f, fb.f, &env->fp_status);
342 flags = get_float_exception_flags(&env->fp_status);
343 update_fpu_flags(flags & float_flag_invalid);
348 uint32_t helper_fcmp_le(uint32_t a, uint32_t b)
356 set_float_exception_flags(0, &env->fp_status);
357 r = float32_le(fa.f, fb.f, &env->fp_status);
358 flags = get_float_exception_flags(&env->fp_status);
359 update_fpu_flags(flags & float_flag_invalid);
365 uint32_t helper_fcmp_gt(uint32_t a, uint32_t b)
372 set_float_exception_flags(0, &env->fp_status);
373 r = float32_lt(fa.f, fb.f, &env->fp_status);
374 flags = get_float_exception_flags(&env->fp_status);
375 update_fpu_flags(flags & float_flag_invalid);
379 uint32_t helper_fcmp_ne(uint32_t a, uint32_t b)
386 set_float_exception_flags(0, &env->fp_status);
387 r = !float32_eq_quiet(fa.f, fb.f, &env->fp_status);
388 flags = get_float_exception_flags(&env->fp_status);
389 update_fpu_flags(flags & float_flag_invalid);
394 uint32_t helper_fcmp_ge(uint32_t a, uint32_t b)
401 set_float_exception_flags(0, &env->fp_status);
402 r = !float32_lt(fa.f, fb.f, &env->fp_status);
403 flags = get_float_exception_flags(&env->fp_status);
404 update_fpu_flags(flags & float_flag_invalid);
409 uint32_t helper_flt(uint32_t a)
414 fd.f = int32_to_float32(fa.l, &env->fp_status);
418 uint32_t helper_fint(uint32_t a)
424 set_float_exception_flags(0, &env->fp_status);
426 r = float32_to_int32(fa.f, &env->fp_status);
427 flags = get_float_exception_flags(&env->fp_status);
428 update_fpu_flags(flags);
433 uint32_t helper_fsqrt(uint32_t a)
438 set_float_exception_flags(0, &env->fp_status);
440 fd.l = float32_sqrt(fa.f, &env->fp_status);
441 flags = get_float_exception_flags(&env->fp_status);
442 update_fpu_flags(flags);
447 uint32_t helper_pcmpbf(uint32_t a, uint32_t b)
450 uint32_t mask = 0xff000000;
452 for (i = 0; i < 4; i++) {
453 if ((a & mask) == (b & mask))
460 void helper_memalign(uint32_t addr, uint32_t dr, uint32_t wr, uint32_t mask)
463 qemu_log_mask(CPU_LOG_INT,
464 "unaligned access addr=%x mask=%x, wr=%d dr=r%d\n",
466 env->sregs[SR_EAR] = addr;
467 env->sregs[SR_ESR] = ESR_EC_UNALIGNED_DATA | (wr << 10) \
470 env->sregs[SR_ESR] |= 1 << 11;
472 if (!(env->sregs[SR_MSR] & MSR_EE)) {
475 helper_raise_exception(EXCP_HW_EXCP);
479 #if !defined(CONFIG_USER_ONLY)
480 /* Writes/reads to the MMU's special regs end up here. */
481 uint32_t helper_mmu_read(uint32_t rn)
483 return mmu_read(env, rn);
486 void helper_mmu_write(uint32_t rn, uint32_t v)
488 mmu_write(env, rn, v);
491 void do_unassigned_access(target_phys_addr_t addr, int is_write, int is_exec,
492 int is_asi, int size)
496 if (!cpu_single_env) {
501 /* XXX: hack to restore env in all cases, even if not called from
504 env = cpu_single_env;
505 qemu_log_mask(CPU_LOG_INT, "Unassigned " TARGET_FMT_plx " wr=%d exe=%d\n",
506 addr, is_write, is_exec);
507 if (!(env->sregs[SR_MSR] & MSR_EE)) {
512 env->sregs[SR_EAR] = addr;
514 if ((env->pvr.regs[2] & PVR2_IOPB_BUS_EXC_MASK)) {
515 env->sregs[SR_ESR] = ESR_EC_INSN_BUS;
516 helper_raise_exception(EXCP_HW_EXCP);
519 if ((env->pvr.regs[2] & PVR2_DOPB_BUS_EXC_MASK)) {
520 env->sregs[SR_ESR] = ESR_EC_DATA_BUS;
521 helper_raise_exception(EXCP_HW_EXCP);