git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@566 c046a42c-6fe2-441c-8c8c-71466251a162
450 lines
10 KiB
C
450 lines
10 KiB
C
/*
|
|
* PPC emulation helpers for qemu.
|
|
*
|
|
* Copyright (c) 2003 Jocelyn Mayer
|
|
*
|
|
* This library is free software; you can redistribute it and/or
|
|
* modify it under the terms of the GNU Lesser General Public
|
|
* License as published by the Free Software Foundation; either
|
|
* version 2 of the License, or (at your option) any later version.
|
|
*
|
|
* This library is distributed in the hope that it will be useful,
|
|
* but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
|
|
* Lesser General Public License for more details.
|
|
*
|
|
* You should have received a copy of the GNU Lesser General Public
|
|
* License along with this library; if not, write to the Free Software
|
|
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
|
|
*/
|
|
#include <math.h>
|
|
#include "exec.h"
|
|
|
|
#if defined(CONFIG_USER_ONLY)
|
|
#define MEMSUFFIX _raw
|
|
#include "op_helper_mem.h"
|
|
#else
|
|
#define MEMSUFFIX _user
|
|
#include "op_helper_mem.h"
|
|
#define MEMSUFFIX _kernel
|
|
#include "op_helper_mem.h"
|
|
#endif
|
|
|
|
/*****************************************************************************/
|
|
/* Exceptions processing helpers */
|
|
void do_queue_exception_err (uint32_t exception, int error_code)
|
|
{
|
|
/* Queue real PPC exceptions */
|
|
if (exception < EXCP_PPC_MAX) {
|
|
env->exceptions |= 1 << exception;
|
|
env->errors[exception] = error_code;
|
|
} else {
|
|
/* Preserve compatibility with qemu core */
|
|
env->exceptions |= 1;
|
|
env->exception_index = exception;
|
|
env->error_code = error_code;
|
|
}
|
|
}
|
|
|
|
void do_queue_exception (uint32_t exception)
|
|
{
|
|
do_queue_exception_err(exception, 0);
|
|
}
|
|
|
|
void do_check_exception_state (void)
|
|
{
|
|
if ((env->exceptions & 1) == 1 || check_exception_state(env)) {
|
|
env->exceptions &= ~1;
|
|
cpu_loop_exit();
|
|
}
|
|
}
|
|
|
|
/*****************************************************************************/
|
|
/* Helpers for "fat" micro operations */
|
|
/* Special registers load and store */
|
|
void do_load_cr (void)
|
|
{
|
|
T0 = (env->crf[0] << 28) |
|
|
(env->crf[1] << 24) |
|
|
(env->crf[2] << 20) |
|
|
(env->crf[3] << 16) |
|
|
(env->crf[4] << 12) |
|
|
(env->crf[5] << 8) |
|
|
(env->crf[6] << 4) |
|
|
(env->crf[7] << 0);
|
|
}
|
|
|
|
void do_store_cr (uint32_t mask)
|
|
{
|
|
int i, sh;
|
|
|
|
for (i = 0, sh = 7; i < 8; i++, sh --) {
|
|
if (mask & (1 << sh))
|
|
env->crf[i] = (T0 >> (sh * 4)) & 0xF;
|
|
}
|
|
}
|
|
|
|
void do_load_xer (void)
|
|
{
|
|
T0 = (xer_so << XER_SO) |
|
|
(xer_ov << XER_OV) |
|
|
(xer_ca << XER_CA) |
|
|
(xer_bc << XER_BC);
|
|
}
|
|
|
|
void do_store_xer (void)
|
|
{
|
|
xer_so = (T0 >> XER_SO) & 0x01;
|
|
xer_ov = (T0 >> XER_OV) & 0x01;
|
|
xer_ca = (T0 >> XER_CA) & 0x01;
|
|
xer_bc = (T0 >> XER_BC) & 0x1f;
|
|
}
|
|
|
|
void do_load_msr (void)
|
|
{
|
|
T0 = (msr_pow << MSR_POW) |
|
|
(msr_ile << MSR_ILE) |
|
|
(msr_ee << MSR_EE) |
|
|
(msr_pr << MSR_PR) |
|
|
(msr_fp << MSR_FP) |
|
|
(msr_me << MSR_ME) |
|
|
(msr_fe0 << MSR_FE0) |
|
|
(msr_se << MSR_SE) |
|
|
(msr_be << MSR_BE) |
|
|
(msr_fe1 << MSR_FE1) |
|
|
(msr_ip << MSR_IP) |
|
|
(msr_ir << MSR_IR) |
|
|
(msr_dr << MSR_DR) |
|
|
(msr_ri << MSR_RI) |
|
|
(msr_le << MSR_LE);
|
|
}
|
|
|
|
void do_store_msr (void)
|
|
{
|
|
if (((T0 >> MSR_IR) & 0x01) != msr_ir ||
|
|
((T0 >> MSR_DR) & 0x01) != msr_dr ||
|
|
((T0 >> MSR_PR) & 0x01) != msr_pr) {
|
|
/* Flush all tlb when changing translation mode or privilege level */
|
|
do_tlbia();
|
|
}
|
|
#if 0
|
|
if ((T0 >> MSR_IP) & 0x01) {
|
|
printf("Halting CPU. Stop emulation\n");
|
|
do_queue_exception(EXCP_HLT);
|
|
cpu_loop_exit();
|
|
}
|
|
#endif
|
|
msr_pow = (T0 >> MSR_POW) & 0x03;
|
|
msr_ile = (T0 >> MSR_ILE) & 0x01;
|
|
msr_ee = (T0 >> MSR_EE) & 0x01;
|
|
msr_pr = (T0 >> MSR_PR) & 0x01;
|
|
msr_fp = (T0 >> MSR_FP) & 0x01;
|
|
msr_me = (T0 >> MSR_ME) & 0x01;
|
|
msr_fe0 = (T0 >> MSR_FE0) & 0x01;
|
|
msr_se = (T0 >> MSR_SE) & 0x01;
|
|
msr_be = (T0 >> MSR_BE) & 0x01;
|
|
msr_fe1 = (T0 >> MSR_FE1) & 0x01;
|
|
msr_ip = (T0 >> MSR_IP) & 0x01;
|
|
msr_ir = (T0 >> MSR_IR) & 0x01;
|
|
msr_dr = (T0 >> MSR_DR) & 0x01;
|
|
msr_ri = (T0 >> MSR_RI) & 0x01;
|
|
msr_le = (T0 >> MSR_LE) & 0x01;
|
|
}
|
|
|
|
/* shift right arithmetic helper */
|
|
void do_sraw (void)
|
|
{
|
|
int32_t ret;
|
|
|
|
xer_ca = 0;
|
|
if (T1 & 0x20) {
|
|
ret = (-1) * (T0 >> 31);
|
|
if (ret < 0)
|
|
xer_ca = 1;
|
|
} else {
|
|
ret = (int32_t)T0 >> (T1 & 0x1f);
|
|
if (ret < 0 && ((int32_t)T0 & ((1 << T1) - 1)) != 0)
|
|
xer_ca = 1;
|
|
}
|
|
(int32_t)T0 = ret;
|
|
}
|
|
|
|
/* Floating point operations helpers */
|
|
void do_load_fpscr (void)
|
|
{
|
|
/* The 32 MSB of the target fpr are undefined.
|
|
* They'll be zero...
|
|
*/
|
|
union {
|
|
double d;
|
|
struct {
|
|
uint32_t u[2];
|
|
} s;
|
|
} u;
|
|
int i;
|
|
|
|
u.s.u[0] = 0;
|
|
u.s.u[1] = 0;
|
|
for (i = 0; i < 8; i++)
|
|
u.s.u[1] |= env->fpscr[i] << (4 * i);
|
|
FT0 = u.d;
|
|
}
|
|
|
|
void do_store_fpscr (uint32_t mask)
|
|
{
|
|
/*
|
|
* We use only the 32 LSB of the incoming fpr
|
|
*/
|
|
union {
|
|
double d;
|
|
struct {
|
|
uint32_t u[2];
|
|
} s;
|
|
} u;
|
|
int i;
|
|
|
|
u.d = FT0;
|
|
if (mask & 0x80)
|
|
env->fpscr[0] = (env->fpscr[0] & 0x9) | ((u.s.u[1] >> 28) & ~0x9);
|
|
for (i = 1; i < 7; i++) {
|
|
if (mask & (1 << (7 - i)))
|
|
env->fpscr[i] = (u.s.u[1] >> (4 * (7 - i))) & 0xF;
|
|
}
|
|
/* TODO: update FEX & VX */
|
|
/* Set rounding mode */
|
|
switch (env->fpscr[0] & 0x3) {
|
|
case 0:
|
|
/* Best approximation (round to nearest) */
|
|
fesetround(FE_TONEAREST);
|
|
break;
|
|
case 1:
|
|
/* Smaller magnitude (round toward zero) */
|
|
fesetround(FE_TOWARDZERO);
|
|
break;
|
|
case 2:
|
|
/* Round toward +infinite */
|
|
fesetround(FE_UPWARD);
|
|
break;
|
|
case 3:
|
|
/* Round toward -infinite */
|
|
fesetround(FE_DOWNWARD);
|
|
break;
|
|
}
|
|
}
|
|
|
|
void do_fctiw (void)
|
|
{
|
|
union {
|
|
double d;
|
|
uint64_t i;
|
|
} *p = (void *)&FT1;
|
|
|
|
if (FT0 > (double)0x7FFFFFFF)
|
|
p->i = 0x7FFFFFFFULL << 32;
|
|
else if (FT0 < -(double)0x80000000)
|
|
p->i = 0x80000000ULL << 32;
|
|
else
|
|
p->i = 0;
|
|
p->i |= (uint32_t)FT0;
|
|
FT0 = p->d;
|
|
}
|
|
|
|
void do_fctiwz (void)
|
|
{
|
|
union {
|
|
double d;
|
|
uint64_t i;
|
|
} *p = (void *)&FT1;
|
|
int cround = fegetround();
|
|
|
|
fesetround(FE_TOWARDZERO);
|
|
if (FT0 > (double)0x7FFFFFFF)
|
|
p->i = 0x7FFFFFFFULL << 32;
|
|
else if (FT0 < -(double)0x80000000)
|
|
p->i = 0x80000000ULL << 32;
|
|
else
|
|
p->i = 0;
|
|
p->i |= (uint32_t)FT0;
|
|
FT0 = p->d;
|
|
fesetround(cround);
|
|
}
|
|
|
|
void do_fsqrt (void)
|
|
{
|
|
FT0 = sqrt(FT0);
|
|
}
|
|
|
|
void do_fsqrts (void)
|
|
{
|
|
FT0 = (float)sqrt((float)FT0);
|
|
}
|
|
|
|
void do_fres (void)
|
|
{
|
|
FT0 = 1.0 / FT0;
|
|
}
|
|
|
|
void do_fsqrte (void)
|
|
{
|
|
FT0 = 1.0 / sqrt(FT0);
|
|
}
|
|
|
|
void do_fsel (void)
|
|
{
|
|
if (FT0 >= 0)
|
|
FT0 = FT2;
|
|
else
|
|
FT0 = FT1;
|
|
}
|
|
|
|
void do_fcmpu (void)
|
|
{
|
|
env->fpscr[4] &= ~0x1;
|
|
if (isnan(FT0) || isnan(FT1)) {
|
|
T0 = 0x01;
|
|
env->fpscr[4] |= 0x1;
|
|
env->fpscr[6] |= 0x1;
|
|
} else if (FT0 < FT1) {
|
|
T0 = 0x08;
|
|
} else if (FT0 > FT1) {
|
|
T0 = 0x04;
|
|
} else {
|
|
T0 = 0x02;
|
|
}
|
|
env->fpscr[3] |= T0;
|
|
}
|
|
|
|
void do_fcmpo (void)
|
|
{
|
|
env->fpscr[4] &= ~0x1;
|
|
if (isnan(FT0) || isnan(FT1)) {
|
|
T0 = 0x01;
|
|
env->fpscr[4] |= 0x1;
|
|
/* I don't know how to test "quiet" nan... */
|
|
if (0 /* || ! quiet_nan(...) */) {
|
|
env->fpscr[6] |= 0x1;
|
|
if (!(env->fpscr[1] & 0x8))
|
|
env->fpscr[4] |= 0x8;
|
|
} else {
|
|
env->fpscr[4] |= 0x8;
|
|
}
|
|
} else if (FT0 < FT1) {
|
|
T0 = 0x08;
|
|
} else if (FT0 > FT1) {
|
|
T0 = 0x04;
|
|
} else {
|
|
T0 = 0x02;
|
|
}
|
|
env->fpscr[3] |= T0;
|
|
}
|
|
|
|
void do_fabs (void)
|
|
{
|
|
FT0 = fabsl(FT0);
|
|
}
|
|
|
|
void do_fnabs (void)
|
|
{
|
|
FT0 = -fabsl(FT0);
|
|
}
|
|
|
|
/* Instruction cache invalidation helper */
|
|
#define ICACHE_LINE_SIZE 32
|
|
|
|
void do_icbi (void)
|
|
{
|
|
/* Invalidate one cache line */
|
|
T0 &= ~(ICACHE_LINE_SIZE - 1);
|
|
tb_invalidate_page_range(T0, T0 + ICACHE_LINE_SIZE);
|
|
}
|
|
|
|
/* TLB invalidation helpers */
|
|
void do_tlbia (void)
|
|
{
|
|
tlb_flush(env);
|
|
}
|
|
|
|
void do_tlbie (void)
|
|
{
|
|
tlb_flush_page(env, T0);
|
|
}
|
|
|
|
/*****************************************************************************/
|
|
/* Special helpers for debug */
|
|
void dump_rfi (void)
|
|
{
|
|
#if 0
|
|
printf("Return from interrupt\n");
|
|
printf("nip=0x%08x LR=0x%08x CTR=0x%08x MSR=0x%08x\n",
|
|
env->nip, env->lr, env->ctr,
|
|
(msr_pow << MSR_POW) | (msr_ile << MSR_ILE) | (msr_ee << MSR_EE) |
|
|
(msr_pr << MSR_PR) | (msr_fp << MSR_FP) | (msr_me << MSR_ME) |
|
|
(msr_fe0 << MSR_FE0) | (msr_se << MSR_SE) | (msr_be << MSR_BE) |
|
|
(msr_fe1 << MSR_FE1) | (msr_ip << MSR_IP) | (msr_ir << MSR_IR) |
|
|
(msr_dr << MSR_DR) | (msr_ri << MSR_RI) | (msr_le << MSR_LE));
|
|
{
|
|
int i;
|
|
for (i = 0; i < 32; i++) {
|
|
if ((i & 7) == 0)
|
|
printf("GPR%02d:", i);
|
|
printf(" %08x", env->gpr[i]);
|
|
if ((i & 7) == 7)
|
|
printf("\n");
|
|
}
|
|
printf("CR: 0x");
|
|
for (i = 0; i < 8; i++)
|
|
printf("%01x", env->crf[i]);
|
|
printf(" [");
|
|
for (i = 0; i < 8; i++) {
|
|
char a = '-';
|
|
if (env->crf[i] & 0x08)
|
|
a = 'L';
|
|
else if (env->crf[i] & 0x04)
|
|
a = 'G';
|
|
else if (env->crf[i] & 0x02)
|
|
a = 'E';
|
|
printf(" %c%c", a, env->crf[i] & 0x01 ? 'O' : ' ');
|
|
}
|
|
printf(" ] ");
|
|
}
|
|
printf("TB: 0x%08x %08x\n", env->tb[1], env->tb[0]);
|
|
printf("SRR0 0x%08x SRR1 0x%08x\n", env->spr[SRR0], env->spr[SRR1]);
|
|
#endif
|
|
}
|
|
|
|
void dump_store_sr (int srnum)
|
|
{
|
|
#if 0
|
|
printf("%s: reg=%d 0x%08x\n", __func__, srnum, T0);
|
|
#endif
|
|
}
|
|
|
|
static void _dump_store_bat (char ID, int ul, int nr)
|
|
{
|
|
printf("Set %cBAT%d%c to 0x%08x (0x%08x)\n",
|
|
ID, nr, ul == 0 ? 'u' : 'l', T0, env->nip);
|
|
}
|
|
|
|
void dump_store_ibat (int ul, int nr)
|
|
{
|
|
_dump_store_bat('I', ul, nr);
|
|
}
|
|
|
|
void dump_store_dbat (int ul, int nr)
|
|
{
|
|
_dump_store_bat('D', ul, nr);
|
|
}
|
|
|
|
void dump_store_tb (int ul)
|
|
{
|
|
printf("Set TB%c to 0x%08x\n", ul == 0 ? 'L' : 'U', T0);
|
|
}
|
|
|
|
void dump_update_tb(uint32_t param)
|
|
{
|
|
#if 0
|
|
printf("Update TB: 0x%08x + %d => 0x%08x\n", T1, param, T0);
|
|
#endif
|
|
}
|
|
|