PowerPC system emulation (Jocelyn Mayer) - modified patch to use new TLB api

git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@528 c046a42c-6fe2-441c-8c8c-71466251a162

1 files changed, 445 insertions, 0 deletions

diff --git a/target-ppc/op_helper.c b/target-ppc/op_helper.c
new file mode 100644
index 0000000000..5d02dfabe7
--- /dev/null
+++ b/target-ppc/op_helper.c
@@ -0,0 +1,445 @@
+/*
+ *  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 */
+void do_icbi (void)
+{
+    //    tb_invalidate_page(T0);
+}
+
+/* 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
+}
+