2 * PPC emulation helpers for qemu.
4 * Copyright (c) 2003 Jocelyn Mayer
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, write to the Free Software
18 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
23 #define MEMSUFFIX _raw
24 #include "op_helper_mem.h"
25 #if !defined(CONFIG_USER_ONLY)
26 #define MEMSUFFIX _user
27 #include "op_helper_mem.h"
28 #define MEMSUFFIX _kernel
29 #include "op_helper_mem.h"
32 /*****************************************************************************/
33 /* Exceptions processing helpers */
34 void do_queue_exception_err (uint32_t exception, int error_code)
36 /* Queue real PPC exceptions */
37 if (exception < EXCP_PPC_MAX) {
38 env->exceptions |= 1 << exception;
39 env->errors[exception] = error_code;
41 /* Preserve compatibility with qemu core */
43 env->exception_index = exception;
44 env->error_code = error_code;
48 void do_queue_exception (uint32_t exception)
50 do_queue_exception_err(exception, 0);
53 void do_check_exception_state (void)
55 if ((env->exceptions & 1) == 1 || check_exception_state(env)) {
56 env->exceptions &= ~1;
61 /*****************************************************************************/
62 /* Helpers for "fat" micro operations */
63 /* Special registers load and store */
64 void do_load_cr (void)
66 T0 = (env->crf[0] << 28) |
76 void do_store_cr (uint32_t mask)
80 for (i = 0, sh = 7; i < 8; i++, sh --) {
82 env->crf[i] = (T0 >> (sh * 4)) & 0xF;
86 void do_load_xer (void)
88 T0 = (xer_so << XER_SO) |
94 void do_store_xer (void)
96 xer_so = (T0 >> XER_SO) & 0x01;
97 xer_ov = (T0 >> XER_OV) & 0x01;
98 xer_ca = (T0 >> XER_CA) & 0x01;
99 xer_bc = (T0 >> XER_BC) & 0x1f;
102 void do_load_msr (void)
104 T0 = (msr_pow << MSR_POW) |
105 (msr_ile << MSR_ILE) |
110 (msr_fe0 << MSR_FE0) |
113 (msr_fe1 << MSR_FE1) |
121 void do_store_msr (void)
123 if (((T0 >> MSR_IR) & 0x01) != msr_ir ||
124 ((T0 >> MSR_DR) & 0x01) != msr_dr) {
125 /* Flush all tlb when changing translation mode or privilege level */
129 if ((T0 >> MSR_IP) & 0x01) {
130 printf("Halting CPU. Stop emulation\n");
131 do_queue_exception(EXCP_HLT);
135 msr_pow = (T0 >> MSR_POW) & 0x03;
136 msr_ile = (T0 >> MSR_ILE) & 0x01;
137 msr_ee = (T0 >> MSR_EE) & 0x01;
138 msr_pr = (T0 >> MSR_PR) & 0x01;
139 msr_fp = (T0 >> MSR_FP) & 0x01;
140 msr_me = (T0 >> MSR_ME) & 0x01;
141 msr_fe0 = (T0 >> MSR_FE0) & 0x01;
142 msr_se = (T0 >> MSR_SE) & 0x01;
143 msr_be = (T0 >> MSR_BE) & 0x01;
144 msr_fe1 = (T0 >> MSR_FE1) & 0x01;
145 msr_ip = (T0 >> MSR_IP) & 0x01;
146 msr_ir = (T0 >> MSR_IR) & 0x01;
147 msr_dr = (T0 >> MSR_DR) & 0x01;
148 msr_ri = (T0 >> MSR_RI) & 0x01;
149 msr_le = (T0 >> MSR_LE) & 0x01;
152 /* shift right arithmetic helper */
159 ret = (-1) * (T0 >> 31);
163 ret = (int32_t)T0 >> (T1 & 0x1f);
164 if (ret < 0 && ((int32_t)T0 & ((1 << T1) - 1)) != 0)
170 /* Floating point operations helpers */
171 void do_load_fpscr (void)
173 /* The 32 MSB of the target fpr are undefined.
186 for (i = 0; i < 8; i++)
187 u.s.u[1] |= env->fpscr[i] << (4 * i);
191 void do_store_fpscr (uint32_t mask)
194 * We use only the 32 LSB of the incoming fpr
206 env->fpscr[0] = (env->fpscr[0] & 0x9) | ((u.s.u[1] >> 28) & ~0x9);
207 for (i = 1; i < 7; i++) {
208 if (mask & (1 << (7 - i)))
209 env->fpscr[i] = (u.s.u[1] >> (4 * (7 - i))) & 0xF;
211 /* TODO: update FEX & VX */
212 /* Set rounding mode */
213 switch (env->fpscr[0] & 0x3) {
215 /* Best approximation (round to nearest) */
216 fesetround(FE_TONEAREST);
219 /* Smaller magnitude (round toward zero) */
220 fesetround(FE_TOWARDZERO);
223 /* Round toward +infinite */
224 fesetround(FE_UPWARD);
227 /* Round toward -infinite */
228 fesetround(FE_DOWNWARD);
240 if (FT0 > (double)0x7FFFFFFF)
241 p->i = 0x7FFFFFFFULL << 32;
242 else if (FT0 < -(double)0x80000000)
243 p->i = 0x80000000ULL << 32;
246 p->i |= (uint32_t)FT0;
250 void do_fctiwz (void)
256 int cround = fegetround();
258 fesetround(FE_TOWARDZERO);
259 if (FT0 > (double)0x7FFFFFFF)
260 p->i = 0x7FFFFFFFULL << 32;
261 else if (FT0 < -(double)0x80000000)
262 p->i = 0x80000000ULL << 32;
265 p->i |= (uint32_t)FT0;
270 void do_fnmadds (void)
272 FTS0 = -((FTS0 * FTS1) + FTS2);
275 void do_fnmsubs (void)
277 FTS0 = -((FTS0 * FTS1) - FTS2);
285 void do_fsqrts (void)
287 FT0 = (float)sqrt((float)FT0);
295 void do_fsqrte (void)
297 FT0 = 1.0 / sqrt(FT0);
310 env->fpscr[4] &= ~0x1;
311 if (isnan(FT0) || isnan(FT1)) {
313 env->fpscr[4] |= 0x1;
314 env->fpscr[6] |= 0x1;
315 } else if (FT0 < FT1) {
317 } else if (FT0 > FT1) {
327 env->fpscr[4] &= ~0x1;
328 if (isnan(FT0) || isnan(FT1)) {
330 env->fpscr[4] |= 0x1;
331 /* I don't know how to test "quiet" nan... */
332 if (0 /* || ! quiet_nan(...) */) {
333 env->fpscr[6] |= 0x1;
334 if (!(env->fpscr[1] & 0x8))
335 env->fpscr[4] |= 0x8;
337 env->fpscr[4] |= 0x8;
339 } else if (FT0 < FT1) {
341 } else if (FT0 > FT1) {
359 /* Instruction cache invalidation helper */
360 #define ICACHE_LINE_SIZE 32
364 /* Invalidate one cache line */
365 T0 &= ~(ICACHE_LINE_SIZE - 1);
366 tb_invalidate_page_range(T0, T0 + ICACHE_LINE_SIZE);
369 /* TLB invalidation helpers */
377 tlb_flush_page(env, T0);
380 /*****************************************************************************/
381 /* Special helpers for debug */
384 void dump_state (void)
386 cpu_ppc_dump_state(env, stdout, 0);
392 printf("Return from interrupt %d => 0x%08x\n", pos, env->nip);
393 // cpu_ppc_dump_state(env, stdout, 0);
397 void dump_store_sr (int srnum)
400 printf("%s: reg=%d 0x%08x\n", __func__, srnum, T0);
404 static void _dump_store_bat (char ID, int ul, int nr)
406 printf("Set %cBAT%d%c to 0x%08x (0x%08x)\n",
407 ID, nr, ul == 0 ? 'u' : 'l', T0, env->nip);
410 void dump_store_ibat (int ul, int nr)
412 _dump_store_bat('I', ul, nr);
415 void dump_store_dbat (int ul, int nr)
417 _dump_store_bat('D', ul, nr);
420 void dump_store_tb (int ul)
422 printf("Set TB%c to 0x%08x\n", ul == 0 ? 'L' : 'U', T0);
425 void dump_update_tb(uint32_t param)
428 printf("Update TB: 0x%08x + %d => 0x%08x\n", T1, param, T0);