diff --git a/target/mips/Makefile.objs b/target/mips/Makefile.objs
index 3448ad5..3ca2bde 100644
--- a/target/mips/Makefile.objs
+++ b/target/mips/Makefile.objs
@@ -1,5 +1,6 @@
-obj-y += translate.o dsp_helper.o op_helper.o lmi_helper.o helper.o cpu.o
-obj-y += gdbstub.o msa_helper.o
+obj-y += translate.o cpu.o gdbstub.o helper.o
+obj-y += op_helper.o cp0_helper.o
+obj-y += dsp_helper.o lmi_helper.o msa_helper.o
 obj-$(CONFIG_SOFTMMU) += mips-semi.o
 obj-$(CONFIG_SOFTMMU) += machine.o cp0_timer.o
 obj-$(CONFIG_KVM) += kvm.o
diff --git a/target/mips/cp0_helper.c b/target/mips/cp0_helper.c
new file mode 100644
index 0000000..bbf12e4
--- /dev/null
+++ b/target/mips/cp0_helper.c
@@ -0,0 +1,1678 @@
+/*
+ *  Helpers for emulation of CP0-related MIPS instructions.
+ *
+ *  Copyright (C) 2004-2005  Jocelyn Mayer
+ *  Copyright (C) 2020  Wave Computing, Inc.
+ *  Copyright (C) 2020  Aleksandar Markovic <amarkovic@wavecomp.com>
+ *
+ * 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, see <http://www.gnu.org/licenses/>.
+ *
+ */
+
+#include "qemu/osdep.h"
+#include "qemu/main-loop.h"
+#include "cpu.h"
+#include "internal.h"
+#include "qemu/host-utils.h"
+#include "exec/helper-proto.h"
+#include "exec/exec-all.h"
+#include "exec/cpu_ldst.h"
+#include "exec/memop.h"
+#include "sysemu/kvm.h"
+
+
+#ifndef CONFIG_USER_ONLY
+/* SMP helpers.  */
+static bool mips_vpe_is_wfi(MIPSCPU *c)
+{
+    CPUState *cpu = CPU(c);
+    CPUMIPSState *env = &c->env;
+
+    /*
+     * If the VPE is halted but otherwise active, it means it's waiting for
+     * an interrupt.\
+     */
+    return cpu->halted && mips_vpe_active(env);
+}
+
+static bool mips_vp_is_wfi(MIPSCPU *c)
+{
+    CPUState *cpu = CPU(c);
+    CPUMIPSState *env = &c->env;
+
+    return cpu->halted && mips_vp_active(env);
+}
+
+static inline void mips_vpe_wake(MIPSCPU *c)
+{
+    /*
+     * Don't set ->halted = 0 directly, let it be done via cpu_has_work
+     * because there might be other conditions that state that c should
+     * be sleeping.
+     */
+    qemu_mutex_lock_iothread();
+    cpu_interrupt(CPU(c), CPU_INTERRUPT_WAKE);
+    qemu_mutex_unlock_iothread();
+}
+
+static inline void mips_vpe_sleep(MIPSCPU *cpu)
+{
+    CPUState *cs = CPU(cpu);
+
+    /*
+     * The VPE was shut off, really go to bed.
+     * Reset any old _WAKE requests.
+     */
+    cs->halted = 1;
+    cpu_reset_interrupt(cs, CPU_INTERRUPT_WAKE);
+}
+
+static inline void mips_tc_wake(MIPSCPU *cpu, int tc)
+{
+    CPUMIPSState *c = &cpu->env;
+
+    /* FIXME: TC reschedule.  */
+    if (mips_vpe_active(c) && !mips_vpe_is_wfi(cpu)) {
+        mips_vpe_wake(cpu);
+    }
+}
+
+static inline void mips_tc_sleep(MIPSCPU *cpu, int tc)
+{
+    CPUMIPSState *c = &cpu->env;
+
+    /* FIXME: TC reschedule.  */
+    if (!mips_vpe_active(c)) {
+        mips_vpe_sleep(cpu);
+    }
+}
+
+/**
+ * mips_cpu_map_tc:
+ * @env: CPU from which mapping is performed.
+ * @tc: Should point to an int with the value of the global TC index.
+ *
+ * This function will transform @tc into a local index within the
+ * returned #CPUMIPSState.
+ */
+
+/*
+ * FIXME: This code assumes that all VPEs have the same number of TCs,
+ *        which depends on runtime setup. Can probably be fixed by
+ *        walking the list of CPUMIPSStates.
+ */
+static CPUMIPSState *mips_cpu_map_tc(CPUMIPSState *env, int *tc)
+{
+    MIPSCPU *cpu;
+    CPUState *cs;
+    CPUState *other_cs;
+    int vpe_idx;
+    int tc_idx = *tc;
+
+    if (!(env->CP0_VPEConf0 & (1 << CP0VPEC0_MVP))) {
+        /* Not allowed to address other CPUs.  */
+        *tc = env->current_tc;
+        return env;
+    }
+
+    cs = env_cpu(env);
+    vpe_idx = tc_idx / cs->nr_threads;
+    *tc = tc_idx % cs->nr_threads;
+    other_cs = qemu_get_cpu(vpe_idx);
+    if (other_cs == NULL) {
+        return env;
+    }
+    cpu = MIPS_CPU(other_cs);
+    return &cpu->env;
+}
+
+/*
+ * The per VPE CP0_Status register shares some fields with the per TC
+ * CP0_TCStatus registers. These fields are wired to the same registers,
+ * so changes to either of them should be reflected on both registers.
+ *
+ * Also, EntryHi shares the bottom 8 bit ASID with TCStauts.
+ *
+ * These helper call synchronizes the regs for a given cpu.
+ */
+
+/*
+ * Called for updates to CP0_Status.  Defined in "cpu.h" for gdbstub.c.
+ * static inline void sync_c0_status(CPUMIPSState *env, CPUMIPSState *cpu,
+ *                                   int tc);
+ */
+
+/* Called for updates to CP0_TCStatus.  */
+static void sync_c0_tcstatus(CPUMIPSState *cpu, int tc,
+                             target_ulong v)
+{
+    uint32_t status;
+    uint32_t tcu, tmx, tasid, tksu;
+    uint32_t mask = ((1U << CP0St_CU3)
+                       | (1 << CP0St_CU2)
+                       | (1 << CP0St_CU1)
+                       | (1 << CP0St_CU0)
+                       | (1 << CP0St_MX)
+                       | (3 << CP0St_KSU));
+
+    tcu = (v >> CP0TCSt_TCU0) & 0xf;
+    tmx = (v >> CP0TCSt_TMX) & 0x1;
+    tasid = v & cpu->CP0_EntryHi_ASID_mask;
+    tksu = (v >> CP0TCSt_TKSU) & 0x3;
+
+    status = tcu << CP0St_CU0;
+    status |= tmx << CP0St_MX;
+    status |= tksu << CP0St_KSU;
+
+    cpu->CP0_Status &= ~mask;
+    cpu->CP0_Status |= status;
+
+    /* Sync the TASID with EntryHi.  */
+    cpu->CP0_EntryHi &= ~cpu->CP0_EntryHi_ASID_mask;
+    cpu->CP0_EntryHi |= tasid;
+
+    compute_hflags(cpu);
+}
+
+/* Called for updates to CP0_EntryHi.  */
+static void sync_c0_entryhi(CPUMIPSState *cpu, int tc)
+{
+    int32_t *tcst;
+    uint32_t asid, v = cpu->CP0_EntryHi;
+
+    asid = v & cpu->CP0_EntryHi_ASID_mask;
+
+    if (tc == cpu->current_tc) {
+        tcst = &cpu->active_tc.CP0_TCStatus;
+    } else {
+        tcst = &cpu->tcs[tc].CP0_TCStatus;
+    }
+
+    *tcst &= ~cpu->CP0_EntryHi_ASID_mask;
+    *tcst |= asid;
+}
+
+/* CP0 helpers */
+target_ulong helper_mfc0_mvpcontrol(CPUMIPSState *env)
+{
+    return env->mvp->CP0_MVPControl;
+}
+
+target_ulong helper_mfc0_mvpconf0(CPUMIPSState *env)
+{
+    return env->mvp->CP0_MVPConf0;
+}
+
+target_ulong helper_mfc0_mvpconf1(CPUMIPSState *env)
+{
+    return env->mvp->CP0_MVPConf1;
+}
+
+target_ulong helper_mfc0_random(CPUMIPSState *env)
+{
+    return (int32_t)cpu_mips_get_random(env);
+}
+
+target_ulong helper_mfc0_tcstatus(CPUMIPSState *env)
+{
+    return env->active_tc.CP0_TCStatus;
+}
+
+target_ulong helper_mftc0_tcstatus(CPUMIPSState *env)
+{
+    int other_tc = env->CP0_VPEControl & (0xff << CP0VPECo_TargTC);
+    CPUMIPSState *other = mips_cpu_map_tc(env, &other_tc);
+
+    if (other_tc == other->current_tc) {
+        return other->active_tc.CP0_TCStatus;
+    } else {
+        return other->tcs[other_tc].CP0_TCStatus;
+    }
+}
+
+target_ulong helper_mfc0_tcbind(CPUMIPSState *env)
+{
+    return env->active_tc.CP0_TCBind;
+}
+
+target_ulong helper_mftc0_tcbind(CPUMIPSState *env)
+{
+    int other_tc = env->CP0_VPEControl & (0xff << CP0VPECo_TargTC);
+    CPUMIPSState *other = mips_cpu_map_tc(env, &other_tc);
+
+    if (other_tc == other->current_tc) {
+        return other->active_tc.CP0_TCBind;
+    } else {
+        return other->tcs[other_tc].CP0_TCBind;
+    }
+}
+
+target_ulong helper_mfc0_tcrestart(CPUMIPSState *env)
+{
+    return env->active_tc.PC;
+}
+
+target_ulong helper_mftc0_tcrestart(CPUMIPSState *env)
+{
+    int other_tc = env->CP0_VPEControl & (0xff << CP0VPECo_TargTC);
+    CPUMIPSState *other = mips_cpu_map_tc(env, &other_tc);
+
+    if (other_tc == other->current_tc) {
+        return other->active_tc.PC;
+    } else {
+        return other->tcs[other_tc].PC;
+    }
+}
+
+target_ulong helper_mfc0_tchalt(CPUMIPSState *env)
+{
+    return env->active_tc.CP0_TCHalt;
+}
+
+target_ulong helper_mftc0_tchalt(CPUMIPSState *env)
+{
+    int other_tc = env->CP0_VPEControl & (0xff << CP0VPECo_TargTC);
+    CPUMIPSState *other = mips_cpu_map_tc(env, &other_tc);
+
+    if (other_tc == other->current_tc) {
+        return other->active_tc.CP0_TCHalt;
+    } else {
+        return other->tcs[other_tc].CP0_TCHalt;
+    }
+}
+
+target_ulong helper_mfc0_tccontext(CPUMIPSState *env)
+{
+    return env->active_tc.CP0_TCContext;
+}
+
+target_ulong helper_mftc0_tccontext(CPUMIPSState *env)
+{
+    int other_tc = env->CP0_VPEControl & (0xff << CP0VPECo_TargTC);
+    CPUMIPSState *other = mips_cpu_map_tc(env, &other_tc);
+
+    if (other_tc == other->current_tc) {
+        return other->active_tc.CP0_TCContext;
+    } else {
+        return other->tcs[other_tc].CP0_TCContext;
+    }
+}
+
+target_ulong helper_mfc0_tcschedule(CPUMIPSState *env)
+{
+    return env->active_tc.CP0_TCSchedule;
+}
+
+target_ulong helper_mftc0_tcschedule(CPUMIPSState *env)
+{
+    int other_tc = env->CP0_VPEControl & (0xff << CP0VPECo_TargTC);
+    CPUMIPSState *other = mips_cpu_map_tc(env, &other_tc);
+
+    if (other_tc == other->current_tc) {
+        return other->active_tc.CP0_TCSchedule;
+    } else {
+        return other->tcs[other_tc].CP0_TCSchedule;
+    }
+}
+
+target_ulong helper_mfc0_tcschefback(CPUMIPSState *env)
+{
+    return env->active_tc.CP0_TCScheFBack;
+}
+
+target_ulong helper_mftc0_tcschefback(CPUMIPSState *env)
+{
+    int other_tc = env->CP0_VPEControl & (0xff << CP0VPECo_TargTC);
+    CPUMIPSState *other = mips_cpu_map_tc(env, &other_tc);
+
+    if (other_tc == other->current_tc) {
+        return other->active_tc.CP0_TCScheFBack;
+    } else {
+        return other->tcs[other_tc].CP0_TCScheFBack;
+    }
+}
+
+target_ulong helper_mfc0_count(CPUMIPSState *env)
+{
+    return (int32_t)cpu_mips_get_count(env);
+}
+
+target_ulong helper_mfc0_saar(CPUMIPSState *env)
+{
+    if ((env->CP0_SAARI & 0x3f) < 2) {
+        return (int32_t) env->CP0_SAAR[env->CP0_SAARI & 0x3f];
+    }
+    return 0;
+}
+
+target_ulong helper_mfhc0_saar(CPUMIPSState *env)
+{
+    if ((env->CP0_SAARI & 0x3f) < 2) {
+        return env->CP0_SAAR[env->CP0_SAARI & 0x3f] >> 32;
+    }
+    return 0;
+}
+
+target_ulong helper_mftc0_entryhi(CPUMIPSState *env)
+{
+    int other_tc = env->CP0_VPEControl & (0xff << CP0VPECo_TargTC);
+    CPUMIPSState *other = mips_cpu_map_tc(env, &other_tc);
+
+    return other->CP0_EntryHi;
+}
+
+target_ulong helper_mftc0_cause(CPUMIPSState *env)
+{
+    int other_tc = env->CP0_VPEControl & (0xff << CP0VPECo_TargTC);
+    int32_t tccause;
+    CPUMIPSState *other = mips_cpu_map_tc(env, &other_tc);
+
+    if (other_tc == other->current_tc) {
+        tccause = other->CP0_Cause;
+    } else {
+        tccause = other->CP0_Cause;
+    }
+
+    return tccause;
+}
+
+target_ulong helper_mftc0_status(CPUMIPSState *env)
+{
+    int other_tc = env->CP0_VPEControl & (0xff << CP0VPECo_TargTC);
+    CPUMIPSState *other = mips_cpu_map_tc(env, &other_tc);
+
+    return other->CP0_Status;
+}
+
+target_ulong helper_mfc0_lladdr(CPUMIPSState *env)
+{
+    return (int32_t)(env->CP0_LLAddr >> env->CP0_LLAddr_shift);
+}
+
+target_ulong helper_mfc0_maar(CPUMIPSState *env)
+{
+    return (int32_t) env->CP0_MAAR[env->CP0_MAARI];
+}
+
+target_ulong helper_mfhc0_maar(CPUMIPSState *env)
+{
+    return env->CP0_MAAR[env->CP0_MAARI] >> 32;
+}
+
+target_ulong helper_mfc0_watchlo(CPUMIPSState *env, uint32_t sel)
+{
+    return (int32_t)env->CP0_WatchLo[sel];
+}
+
+target_ulong helper_mfc0_watchhi(CPUMIPSState *env, uint32_t sel)
+{
+    return (int32_t) env->CP0_WatchHi[sel];
+}
+
+target_ulong helper_mfhc0_watchhi(CPUMIPSState *env, uint32_t sel)
+{
+    return env->CP0_WatchHi[sel] >> 32;
+}
+
+target_ulong helper_mfc0_debug(CPUMIPSState *env)
+{
+    target_ulong t0 = env->CP0_Debug;
+    if (env->hflags & MIPS_HFLAG_DM) {
+        t0 |= 1 << CP0DB_DM;
+    }
+
+    return t0;
+}
+
+target_ulong helper_mftc0_debug(CPUMIPSState *env)
+{
+    int other_tc = env->CP0_VPEControl & (0xff << CP0VPECo_TargTC);
+    int32_t tcstatus;
+    CPUMIPSState *other = mips_cpu_map_tc(env, &other_tc);
+
+    if (other_tc == other->current_tc) {
+        tcstatus = other->active_tc.CP0_Debug_tcstatus;
+    } else {
+        tcstatus = other->tcs[other_tc].CP0_Debug_tcstatus;
+    }
+
+    /* XXX: Might be wrong, check with EJTAG spec. */
+    return (other->CP0_Debug & ~((1 << CP0DB_SSt) | (1 << CP0DB_Halt))) |
+            (tcstatus & ((1 << CP0DB_SSt) | (1 << CP0DB_Halt)));
+}
+
+#if defined(TARGET_MIPS64)
+target_ulong helper_dmfc0_tcrestart(CPUMIPSState *env)
+{
+    return env->active_tc.PC;
+}
+
+target_ulong helper_dmfc0_tchalt(CPUMIPSState *env)
+{
+    return env->active_tc.CP0_TCHalt;
+}
+
+target_ulong helper_dmfc0_tccontext(CPUMIPSState *env)
+{
+    return env->active_tc.CP0_TCContext;
+}
+
+target_ulong helper_dmfc0_tcschedule(CPUMIPSState *env)
+{
+    return env->active_tc.CP0_TCSchedule;
+}
+
+target_ulong helper_dmfc0_tcschefback(CPUMIPSState *env)
+{
+    return env->active_tc.CP0_TCScheFBack;
+}
+
+target_ulong helper_dmfc0_lladdr(CPUMIPSState *env)
+{
+    return env->CP0_LLAddr >> env->CP0_LLAddr_shift;
+}
+
+target_ulong helper_dmfc0_maar(CPUMIPSState *env)
+{
+    return env->CP0_MAAR[env->CP0_MAARI];
+}
+
+target_ulong helper_dmfc0_watchlo(CPUMIPSState *env, uint32_t sel)
+{
+    return env->CP0_WatchLo[sel];
+}
+
+target_ulong helper_dmfc0_watchhi(CPUMIPSState *env, uint32_t sel)
+{
+    return env->CP0_WatchHi[sel];
+}
+
+target_ulong helper_dmfc0_saar(CPUMIPSState *env)
+{
+    if ((env->CP0_SAARI & 0x3f) < 2) {
+        return env->CP0_SAAR[env->CP0_SAARI & 0x3f];
+    }
+    return 0;
+}
+#endif /* TARGET_MIPS64 */
+
+void helper_mtc0_index(CPUMIPSState *env, target_ulong arg1)
+{
+    uint32_t index_p = env->CP0_Index & 0x80000000;
+    uint32_t tlb_index = arg1 & 0x7fffffff;
+    if (tlb_index < env->tlb->nb_tlb) {
+        if (env->insn_flags & ISA_MIPS32R6) {
+            index_p |= arg1 & 0x80000000;
+        }
+        env->CP0_Index = index_p | tlb_index;
+    }
+}
+
+void helper_mtc0_mvpcontrol(CPUMIPSState *env, target_ulong arg1)
+{
+    uint32_t mask = 0;
+    uint32_t newval;
+
+    if (env->CP0_VPEConf0 & (1 << CP0VPEC0_MVP)) {
+        mask |= (1 << CP0MVPCo_CPA) | (1 << CP0MVPCo_VPC) |
+                (1 << CP0MVPCo_EVP);
+    }
+    if (env->mvp->CP0_MVPControl & (1 << CP0MVPCo_VPC)) {
+        mask |= (1 << CP0MVPCo_STLB);
+    }
+    newval = (env->mvp->CP0_MVPControl & ~mask) | (arg1 & mask);
+
+    /* TODO: Enable/disable shared TLB, enable/disable VPEs. */
+
+    env->mvp->CP0_MVPControl = newval;
+}
+
+void helper_mtc0_vpecontrol(CPUMIPSState *env, target_ulong arg1)
+{
+    uint32_t mask;
+    uint32_t newval;
+
+    mask = (1 << CP0VPECo_YSI) | (1 << CP0VPECo_GSI) |
+           (1 << CP0VPECo_TE) | (0xff << CP0VPECo_TargTC);
+    newval = (env->CP0_VPEControl & ~mask) | (arg1 & mask);
+
+    /*
+     * Yield scheduler intercept not implemented.
+     * Gating storage scheduler intercept not implemented.
+     */
+
+    /* TODO: Enable/disable TCs. */
+
+    env->CP0_VPEControl = newval;
+}
+
+void helper_mttc0_vpecontrol(CPUMIPSState *env, target_ulong arg1)
+{
+    int other_tc = env->CP0_VPEControl & (0xff << CP0VPECo_TargTC);
+    CPUMIPSState *other = mips_cpu_map_tc(env, &other_tc);
+    uint32_t mask;
+    uint32_t newval;
+
+    mask = (1 << CP0VPECo_YSI) | (1 << CP0VPECo_GSI) |
+           (1 << CP0VPECo_TE) | (0xff << CP0VPECo_TargTC);
+    newval = (other->CP0_VPEControl & ~mask) | (arg1 & mask);
+
+    /* TODO: Enable/disable TCs.  */
+
+    other->CP0_VPEControl = newval;
+}
+
+target_ulong helper_mftc0_vpecontrol(CPUMIPSState *env)
+{
+    int other_tc = env->CP0_VPEControl & (0xff << CP0VPECo_TargTC);
+    CPUMIPSState *other = mips_cpu_map_tc(env, &other_tc);
+    /* FIXME: Mask away return zero on read bits.  */
+    return other->CP0_VPEControl;
+}
+
+target_ulong helper_mftc0_vpeconf0(CPUMIPSState *env)
+{
+    int other_tc = env->CP0_VPEControl & (0xff << CP0VPECo_TargTC);
+    CPUMIPSState *other = mips_cpu_map_tc(env, &other_tc);
+
+    return other->CP0_VPEConf0;
+}
+
+void helper_mtc0_vpeconf0(CPUMIPSState *env, target_ulong arg1)
+{
+    uint32_t mask = 0;
+    uint32_t newval;
+
+    if (env->CP0_VPEConf0 & (1 << CP0VPEC0_MVP)) {
+        if (env->CP0_VPEConf0 & (1 << CP0VPEC0_VPA)) {
+            mask |= (0xff << CP0VPEC0_XTC);
+        }
+        mask |= (1 << CP0VPEC0_MVP) | (1 << CP0VPEC0_VPA);
+    }
+    newval = (env->CP0_VPEConf0 & ~mask) | (arg1 & mask);
+
+    /* TODO: TC exclusive handling due to ERL/EXL. */
+
+    env->CP0_VPEConf0 = newval;
+}
+
+void helper_mttc0_vpeconf0(CPUMIPSState *env, target_ulong arg1)
+{
+    int other_tc = env->CP0_VPEControl & (0xff << CP0VPECo_TargTC);
+    CPUMIPSState *other = mips_cpu_map_tc(env, &other_tc);
+    uint32_t mask = 0;
+    uint32_t newval;
+
+    mask |= (1 << CP0VPEC0_MVP) | (1 << CP0VPEC0_VPA);
+    newval = (other->CP0_VPEConf0 & ~mask) | (arg1 & mask);
+
+    /* TODO: TC exclusive handling due to ERL/EXL.  */
+    other->CP0_VPEConf0 = newval;
+}
+
+void helper_mtc0_vpeconf1(CPUMIPSState *env, target_ulong arg1)
+{
+    uint32_t mask = 0;
+    uint32_t newval;
+
+    if (env->mvp->CP0_MVPControl & (1 << CP0MVPCo_VPC))
+        mask |= (0xff << CP0VPEC1_NCX) | (0xff << CP0VPEC1_NCP2) |
+                (0xff << CP0VPEC1_NCP1);
+    newval = (env->CP0_VPEConf1 & ~mask) | (arg1 & mask);
+
+    /* UDI not implemented. */
+    /* CP2 not implemented. */
+
+    /* TODO: Handle FPU (CP1) binding. */
+
+    env->CP0_VPEConf1 = newval;
+}
+
+void helper_mtc0_yqmask(CPUMIPSState *env, target_ulong arg1)
+{
+    /* Yield qualifier inputs not implemented. */
+    env->CP0_YQMask = 0x00000000;
+}
+
+void helper_mtc0_vpeopt(CPUMIPSState *env, target_ulong arg1)
+{
+    env->CP0_VPEOpt = arg1 & 0x0000ffff;
+}
+
+#define MTC0_ENTRYLO_MASK(env) ((env->PAMask >> 6) & 0x3FFFFFFF)
+
+void helper_mtc0_entrylo0(CPUMIPSState *env, target_ulong arg1)
+{
+    /* 1k pages not implemented */
+    target_ulong rxi = arg1 & (env->CP0_PageGrain & (3u << CP0PG_XIE));
+    env->CP0_EntryLo0 = (arg1 & MTC0_ENTRYLO_MASK(env))
+                        | (rxi << (CP0EnLo_XI - 30));
+}
+
+#if defined(TARGET_MIPS64)
+#define DMTC0_ENTRYLO_MASK(env) (env->PAMask >> 6)
+
+void helper_dmtc0_entrylo0(CPUMIPSState *env, uint64_t arg1)
+{
+    uint64_t rxi = arg1 & ((env->CP0_PageGrain & (3ull << CP0PG_XIE)) << 32);
+    env->CP0_EntryLo0 = (arg1 & DMTC0_ENTRYLO_MASK(env)) | rxi;
+}
+#endif
+
+void helper_mtc0_tcstatus(CPUMIPSState *env, target_ulong arg1)
+{
+    uint32_t mask = env->CP0_TCStatus_rw_bitmask;
+    uint32_t newval;
+
+    newval = (env->active_tc.CP0_TCStatus & ~mask) | (arg1 & mask);
+
+    env->active_tc.CP0_TCStatus = newval;
+    sync_c0_tcstatus(env, env->current_tc, newval);
+}
+
+void helper_mttc0_tcstatus(CPUMIPSState *env, target_ulong arg1)
+{
+    int other_tc = env->CP0_VPEControl & (0xff << CP0VPECo_TargTC);
+    CPUMIPSState *other = mips_cpu_map_tc(env, &other_tc);
+
+    if (other_tc == other->current_tc) {
+        other->active_tc.CP0_TCStatus = arg1;
+    } else {
+        other->tcs[other_tc].CP0_TCStatus = arg1;
+    }
+    sync_c0_tcstatus(other, other_tc, arg1);
+}
+
+void helper_mtc0_tcbind(CPUMIPSState *env, target_ulong arg1)
+{
+    uint32_t mask = (1 << CP0TCBd_TBE);
+    uint32_t newval;
+
+    if (env->mvp->CP0_MVPControl & (1 << CP0MVPCo_VPC)) {
+        mask |= (1 << CP0TCBd_CurVPE);
+    }
+    newval = (env->active_tc.CP0_TCBind & ~mask) | (arg1 & mask);
+    env->active_tc.CP0_TCBind = newval;
+}
+
+void helper_mttc0_tcbind(CPUMIPSState *env, target_ulong arg1)
+{
+    int other_tc = env->CP0_VPEControl & (0xff << CP0VPECo_TargTC);
+    uint32_t mask = (1 << CP0TCBd_TBE);
+    uint32_t newval;
+    CPUMIPSState *other = mips_cpu_map_tc(env, &other_tc);
+
+    if (other->mvp->CP0_MVPControl & (1 << CP0MVPCo_VPC)) {
+        mask |= (1 << CP0TCBd_CurVPE);
+    }
+    if (other_tc == other->current_tc) {
+        newval = (other->active_tc.CP0_TCBind & ~mask) | (arg1 & mask);
+        other->active_tc.CP0_TCBind = newval;
+    } else {
+        newval = (other->tcs[other_tc].CP0_TCBind & ~mask) | (arg1 & mask);
+        other->tcs[other_tc].CP0_TCBind = newval;
+    }
+}
+
+void helper_mtc0_tcrestart(CPUMIPSState *env, target_ulong arg1)
+{
+    env->active_tc.PC = arg1;
+    env->active_tc.CP0_TCStatus &= ~(1 << CP0TCSt_TDS);
+    env->CP0_LLAddr = 0;
+    env->lladdr = 0;
+    /* MIPS16 not implemented. */
+}
+
+void helper_mttc0_tcrestart(CPUMIPSState *env, target_ulong arg1)
+{
+    int other_tc = env->CP0_VPEControl & (0xff << CP0VPECo_TargTC);
+    CPUMIPSState *other = mips_cpu_map_tc(env, &other_tc);
+
+    if (other_tc == other->current_tc) {
+        other->active_tc.PC = arg1;
+        other->active_tc.CP0_TCStatus &= ~(1 << CP0TCSt_TDS);
+        other->CP0_LLAddr = 0;
+        other->lladdr = 0;
+        /* MIPS16 not implemented. */
+    } else {
+        other->tcs[other_tc].PC = arg1;
+        other->tcs[other_tc].CP0_TCStatus &= ~(1 << CP0TCSt_TDS);
+        other->CP0_LLAddr = 0;
+        other->lladdr = 0;
+        /* MIPS16 not implemented. */
+    }
+}
+
+void helper_mtc0_tchalt(CPUMIPSState *env, target_ulong arg1)
+{
+    MIPSCPU *cpu = env_archcpu(env);
+
+    env->active_tc.CP0_TCHalt = arg1 & 0x1;
+
+    /* TODO: Halt TC / Restart (if allocated+active) TC. */
+    if (env->active_tc.CP0_TCHalt & 1) {
+        mips_tc_sleep(cpu, env->current_tc);
+    } else {
+        mips_tc_wake(cpu, env->current_tc);
+    }
+}
+
+void helper_mttc0_tchalt(CPUMIPSState *env, target_ulong arg1)
+{
+    int other_tc = env->CP0_VPEControl & (0xff << CP0VPECo_TargTC);
+    CPUMIPSState *other = mips_cpu_map_tc(env, &other_tc);
+    MIPSCPU *other_cpu = env_archcpu(other);
+
+    /* TODO: Halt TC / Restart (if allocated+active) TC. */
+
+    if (other_tc == other->current_tc) {
+        other->active_tc.CP0_TCHalt = arg1;
+    } else {
+        other->tcs[other_tc].CP0_TCHalt = arg1;
+    }
+
+    if (arg1 & 1) {
+        mips_tc_sleep(other_cpu, other_tc);
+    } else {
+        mips_tc_wake(other_cpu, other_tc);
+    }
+}
+
+void helper_mtc0_tccontext(CPUMIPSState *env, target_ulong arg1)
+{
+    env->active_tc.CP0_TCContext = arg1;
+}
+
+void helper_mttc0_tccontext(CPUMIPSState *env, target_ulong arg1)
+{
+    int other_tc = env->CP0_VPEControl & (0xff << CP0VPECo_TargTC);
+    CPUMIPSState *other = mips_cpu_map_tc(env, &other_tc);
+
+    if (other_tc == other->current_tc) {
+        other->active_tc.CP0_TCContext = arg1;
+    } else {
+        other->tcs[other_tc].CP0_TCContext = arg1;
+    }
+}
+
+void helper_mtc0_tcschedule(CPUMIPSState *env, target_ulong arg1)
+{
+    env->active_tc.CP0_TCSchedule = arg1;
+}
+
+void helper_mttc0_tcschedule(CPUMIPSState *env, target_ulong arg1)
+{
+    int other_tc = env->CP0_VPEControl & (0xff << CP0VPECo_TargTC);
+    CPUMIPSState *other = mips_cpu_map_tc(env, &other_tc);
+
+    if (other_tc == other->current_tc) {
+        other->active_tc.CP0_TCSchedule = arg1;
+    } else {
+        other->tcs[other_tc].CP0_TCSchedule = arg1;
+    }
+}
+
+void helper_mtc0_tcschefback(CPUMIPSState *env, target_ulong arg1)
+{
+    env->active_tc.CP0_TCScheFBack = arg1;
+}
+
+void helper_mttc0_tcschefback(CPUMIPSState *env, target_ulong arg1)
+{
+    int other_tc = env->CP0_VPEControl & (0xff << CP0VPECo_TargTC);
+    CPUMIPSState *other = mips_cpu_map_tc(env, &other_tc);
+
+    if (other_tc == other->current_tc) {
+        other->active_tc.CP0_TCScheFBack = arg1;
+    } else {
+        other->tcs[other_tc].CP0_TCScheFBack = arg1;
+    }
+}
+
+void helper_mtc0_entrylo1(CPUMIPSState *env, target_ulong arg1)
+{
+    /* 1k pages not implemented */
+    target_ulong rxi = arg1 & (env->CP0_PageGrain & (3u << CP0PG_XIE));
+    env->CP0_EntryLo1 = (arg1 & MTC0_ENTRYLO_MASK(env))
+                        | (rxi << (CP0EnLo_XI - 30));
+}
+
+#if defined(TARGET_MIPS64)
+void helper_dmtc0_entrylo1(CPUMIPSState *env, uint64_t arg1)
+{
+    uint64_t rxi = arg1 & ((env->CP0_PageGrain & (3ull << CP0PG_XIE)) << 32);
+    env->CP0_EntryLo1 = (arg1 & DMTC0_ENTRYLO_MASK(env)) | rxi;
+}
+#endif
+
+void helper_mtc0_context(CPUMIPSState *env, target_ulong arg1)
+{
+    env->CP0_Context = (env->CP0_Context & 0x007FFFFF) | (arg1 & ~0x007FFFFF);
+}
+
+void helper_mtc0_memorymapid(CPUMIPSState *env, target_ulong arg1)
+{
+    int32_t old;
+    old = env->CP0_MemoryMapID;
+    env->CP0_MemoryMapID = (int32_t) arg1;
+    /* If the MemoryMapID changes, flush qemu's TLB.  */
+    if (old != env->CP0_MemoryMapID) {
+        cpu_mips_tlb_flush(env);
+    }
+}
+
+void update_pagemask(CPUMIPSState *env, target_ulong arg1, int32_t *pagemask)
+{
+    uint64_t mask = arg1 >> (TARGET_PAGE_BITS + 1);
+    if (!(env->insn_flags & ISA_MIPS32R6) || (arg1 == ~0) ||
+        (mask == 0x0000 || mask == 0x0003 || mask == 0x000F ||
+         mask == 0x003F || mask == 0x00FF || mask == 0x03FF ||
+         mask == 0x0FFF || mask == 0x3FFF || mask == 0xFFFF)) {
+        env->CP0_PageMask = arg1 & (0x1FFFFFFF & (TARGET_PAGE_MASK << 1));
+    }
+}
+
+void helper_mtc0_pagemask(CPUMIPSState *env, target_ulong arg1)
+{
+    update_pagemask(env, arg1, &env->CP0_PageMask);
+}
+
+void helper_mtc0_pagegrain(CPUMIPSState *env, target_ulong arg1)
+{
+    /* SmartMIPS not implemented */
+    /* 1k pages not implemented */
+    env->CP0_PageGrain = (arg1 & env->CP0_PageGrain_rw_bitmask) |
+                         (env->CP0_PageGrain & ~env->CP0_PageGrain_rw_bitmask);
+    compute_hflags(env);
+    restore_pamask(env);
+}
+
+void helper_mtc0_segctl0(CPUMIPSState *env, target_ulong arg1)
+{
+    CPUState *cs = env_cpu(env);
+
+    env->CP0_SegCtl0 = arg1 & CP0SC0_MASK;
+    tlb_flush(cs);
+}
+
+void helper_mtc0_segctl1(CPUMIPSState *env, target_ulong arg1)
+{
+    CPUState *cs = env_cpu(env);
+
+    env->CP0_SegCtl1 = arg1 & CP0SC1_MASK;
+    tlb_flush(cs);
+}
+
+void helper_mtc0_segctl2(CPUMIPSState *env, target_ulong arg1)
+{
+    CPUState *cs = env_cpu(env);
+
+    env->CP0_SegCtl2 = arg1 & CP0SC2_MASK;
+    tlb_flush(cs);
+}
+
+void helper_mtc0_pwfield(CPUMIPSState *env, target_ulong arg1)
+{
+#if defined(TARGET_MIPS64)
+    uint64_t mask = 0x3F3FFFFFFFULL;
+    uint32_t old_ptei = (env->CP0_PWField >> CP0PF_PTEI) & 0x3FULL;
+    uint32_t new_ptei = (arg1 >> CP0PF_PTEI) & 0x3FULL;
+
+    if ((env->insn_flags & ISA_MIPS32R6)) {
+        if (((arg1 >> CP0PF_BDI) & 0x3FULL) < 12) {
+            mask &= ~(0x3FULL << CP0PF_BDI);
+        }
+        if (((arg1 >> CP0PF_GDI) & 0x3FULL) < 12) {
+            mask &= ~(0x3FULL << CP0PF_GDI);
+        }
+        if (((arg1 >> CP0PF_UDI) & 0x3FULL) < 12) {
+            mask &= ~(0x3FULL << CP0PF_UDI);
+        }
+        if (((arg1 >> CP0PF_MDI) & 0x3FULL) < 12) {
+            mask &= ~(0x3FULL << CP0PF_MDI);
+        }
+        if (((arg1 >> CP0PF_PTI) & 0x3FULL) < 12) {
+            mask &= ~(0x3FULL << CP0PF_PTI);
+        }
+    }
+    env->CP0_PWField = arg1 & mask;
+
+    if ((new_ptei >= 32) ||
+            ((env->insn_flags & ISA_MIPS32R6) &&
+                    (new_ptei == 0 || new_ptei == 1))) {
+        env->CP0_PWField = (env->CP0_PWField & ~0x3FULL) |
+                (old_ptei << CP0PF_PTEI);
+    }
+#else
+    uint32_t mask = 0x3FFFFFFF;
+    uint32_t old_ptew = (env->CP0_PWField >> CP0PF_PTEW) & 0x3F;
+    uint32_t new_ptew = (arg1 >> CP0PF_PTEW) & 0x3F;
+
+    if ((env->insn_flags & ISA_MIPS32R6)) {
+        if (((arg1 >> CP0PF_GDW) & 0x3F) < 12) {
+            mask &= ~(0x3F << CP0PF_GDW);
+        }
+        if (((arg1 >> CP0PF_UDW) & 0x3F) < 12) {
+            mask &= ~(0x3F << CP0PF_UDW);
+        }
+        if (((arg1 >> CP0PF_MDW) & 0x3F) < 12) {
+            mask &= ~(0x3F << CP0PF_MDW);
+        }
+        if (((arg1 >> CP0PF_PTW) & 0x3F) < 12) {
+            mask &= ~(0x3F << CP0PF_PTW);
+        }
+    }
+    env->CP0_PWField = arg1 & mask;
+
+    if ((new_ptew >= 32) ||
+            ((env->insn_flags & ISA_MIPS32R6) &&
+                    (new_ptew == 0 || new_ptew == 1))) {
+        env->CP0_PWField = (env->CP0_PWField & ~0x3F) |
+                (old_ptew << CP0PF_PTEW);
+    }
+#endif
+}
+
+void helper_mtc0_pwsize(CPUMIPSState *env, target_ulong arg1)
+{
+#if defined(TARGET_MIPS64)
+    env->CP0_PWSize = arg1 & 0x3F7FFFFFFFULL;
+#else
+    env->CP0_PWSize = arg1 & 0x3FFFFFFF;
+#endif
+}
+
+void helper_mtc0_wired(CPUMIPSState *env, target_ulong arg1)
+{
+    if (env->insn_flags & ISA_MIPS32R6) {
+        if (arg1 < env->tlb->nb_tlb) {
+            env->CP0_Wired = arg1;
+        }
+    } else {
+        env->CP0_Wired = arg1 % env->tlb->nb_tlb;
+    }
+}
+
+void helper_mtc0_pwctl(CPUMIPSState *env, target_ulong arg1)
+{
+#if defined(TARGET_MIPS64)
+    /* PWEn = 0. Hardware page table walking is not implemented. */
+    env->CP0_PWCtl = (env->CP0_PWCtl & 0x000000C0) | (arg1 & 0x5C00003F);
+#else
+    env->CP0_PWCtl = (arg1 & 0x800000FF);
+#endif
+}
+
+void helper_mtc0_srsconf0(CPUMIPSState *env, target_ulong arg1)
+{
+    env->CP0_SRSConf0 |= arg1 & env->CP0_SRSConf0_rw_bitmask;
+}
+
+void helper_mtc0_srsconf1(CPUMIPSState *env, target_ulong arg1)
+{
+    env->CP0_SRSConf1 |= arg1 & env->CP0_SRSConf1_rw_bitmask;
+}
+
+void helper_mtc0_srsconf2(CPUMIPSState *env, target_ulong arg1)
+{
+    env->CP0_SRSConf2 |= arg1 & env->CP0_SRSConf2_rw_bitmask;
+}
+
+void helper_mtc0_srsconf3(CPUMIPSState *env, target_ulong arg1)
+{
+    env->CP0_SRSConf3 |= arg1 & env->CP0_SRSConf3_rw_bitmask;
+}
+
+void helper_mtc0_srsconf4(CPUMIPSState *env, target_ulong arg1)
+{
+    env->CP0_SRSConf4 |= arg1 & env->CP0_SRSConf4_rw_bitmask;
+}
+
+void helper_mtc0_hwrena(CPUMIPSState *env, target_ulong arg1)
+{
+    uint32_t mask = 0x0000000F;
+
+    if ((env->CP0_Config1 & (1 << CP0C1_PC)) &&
+        (env->insn_flags & ISA_MIPS32R6)) {
+        mask |= (1 << 4);
+    }
+    if (env->insn_flags & ISA_MIPS32R6) {
+        mask |= (1 << 5);
+    }
+    if (env->CP0_Config3 & (1 << CP0C3_ULRI)) {
+        mask |= (1 << 29);
+
+        if (arg1 & (1 << 29)) {
+            env->hflags |= MIPS_HFLAG_HWRENA_ULR;
+        } else {
+            env->hflags &= ~MIPS_HFLAG_HWRENA_ULR;
+        }
+    }
+
+    env->CP0_HWREna = arg1 & mask;
+}
+
+void helper_mtc0_count(CPUMIPSState *env, target_ulong arg1)
+{
+    cpu_mips_store_count(env, arg1);
+}
+
+void helper_mtc0_saari(CPUMIPSState *env, target_ulong arg1)
+{
+    uint32_t target = arg1 & 0x3f;
+    if (target <= 1) {
+        env->CP0_SAARI = target;
+    }
+}
+
+void helper_mtc0_saar(CPUMIPSState *env, target_ulong arg1)
+{
+    uint32_t target = env->CP0_SAARI & 0x3f;
+    if (target < 2) {
+        env->CP0_SAAR[target] = arg1 & 0x00000ffffffff03fULL;
+        switch (target) {
+        case 0:
+            if (env->itu) {
+                itc_reconfigure(env->itu);
+            }
+            break;
+        }
+    }
+}
+
+void helper_mthc0_saar(CPUMIPSState *env, target_ulong arg1)
+{
+    uint32_t target = env->CP0_SAARI & 0x3f;
+    if (target < 2) {
+        env->CP0_SAAR[target] =
+            (((uint64_t) arg1 << 32) & 0x00000fff00000000ULL) |
+            (env->CP0_SAAR[target] & 0x00000000ffffffffULL);
+        switch (target) {
+        case 0:
+            if (env->itu) {
+                itc_reconfigure(env->itu);
+            }
+            break;
+        }
+    }
+}
+
+void helper_mtc0_entryhi(CPUMIPSState *env, target_ulong arg1)
+{
+    target_ulong old, val, mask;
+    mask = (TARGET_PAGE_MASK << 1) | env->CP0_EntryHi_ASID_mask;
+    if (((env->CP0_Config4 >> CP0C4_IE) & 0x3) >= 2) {
+        mask |= 1 << CP0EnHi_EHINV;
+    }
+
+    /* 1k pages not implemented */
+#if defined(TARGET_MIPS64)
+    if (env->insn_flags & ISA_MIPS32R6) {
+        int entryhi_r = extract64(arg1, 62, 2);
+        int config0_at = extract32(env->CP0_Config0, 13, 2);
+        bool no_supervisor = (env->CP0_Status_rw_bitmask & 0x8) == 0;
+        if ((entryhi_r == 2) ||
+            (entryhi_r == 1 && (no_supervisor || config0_at == 1))) {
+            /* skip EntryHi.R field if new value is reserved */
+            mask &= ~(0x3ull << 62);
+        }
+    }
+    mask &= env->SEGMask;
+#endif
+    old = env->CP0_EntryHi;
+    val = (arg1 & mask) | (old & ~mask);
+    env->CP0_EntryHi = val;
+    if (env->CP0_Config3 & (1 << CP0C3_MT)) {
+        sync_c0_entryhi(env, env->current_tc);
+    }
+    /* If the ASID changes, flush qemu's TLB.  */
+    if ((old & env->CP0_EntryHi_ASID_mask) !=
+        (val & env->CP0_EntryHi_ASID_mask)) {
+        tlb_flush(env_cpu(env));
+    }
+}
+
+void helper_mttc0_entryhi(CPUMIPSState *env, target_ulong arg1)
+{
+    int other_tc = env->CP0_VPEControl & (0xff << CP0VPECo_TargTC);
+    CPUMIPSState *other = mips_cpu_map_tc(env, &other_tc);
+
+    other->CP0_EntryHi = arg1;
+    sync_c0_entryhi(other, other_tc);
+}
+
+void helper_mtc0_compare(CPUMIPSState *env, target_ulong arg1)
+{
+    cpu_mips_store_compare(env, arg1);
+}
+
+void helper_mtc0_status(CPUMIPSState *env, target_ulong arg1)
+{
+    uint32_t val, old;
+
+    old = env->CP0_Status;
+    cpu_mips_store_status(env, arg1);
+    val = env->CP0_Status;
+
+    if (qemu_loglevel_mask(CPU_LOG_EXEC)) {
+        qemu_log("Status %08x (%08x) => %08x (%08x) Cause %08x",
+                old, old & env->CP0_Cause & CP0Ca_IP_mask,
+                val, val & env->CP0_Cause & CP0Ca_IP_mask,
+                env->CP0_Cause);
+        switch (cpu_mmu_index(env, false)) {
+        case 3:
+            qemu_log(", ERL\n");
+            break;
+        case MIPS_HFLAG_UM:
+            qemu_log(", UM\n");
+            break;
+        case MIPS_HFLAG_SM:
+            qemu_log(", SM\n");
+            break;
+        case MIPS_HFLAG_KM:
+            qemu_log("\n");
+            break;
+        default:
+            cpu_abort(env_cpu(env), "Invalid MMU mode!\n");
+            break;
+        }
+    }
+}
+
+void helper_mttc0_status(CPUMIPSState *env, target_ulong arg1)
+{
+    int other_tc = env->CP0_VPEControl & (0xff << CP0VPECo_TargTC);
+    uint32_t mask = env->CP0_Status_rw_bitmask & ~0xf1000018;
+    CPUMIPSState *other = mips_cpu_map_tc(env, &other_tc);
+
+    other->CP0_Status = (other->CP0_Status & ~mask) | (arg1 & mask);
+    sync_c0_status(env, other, other_tc);
+}
+
+void helper_mtc0_intctl(CPUMIPSState *env, target_ulong arg1)
+{
+    env->CP0_IntCtl = (env->CP0_IntCtl & ~0x000003e0) | (arg1 & 0x000003e0);
+}
+
+void helper_mtc0_srsctl(CPUMIPSState *env, target_ulong arg1)
+{
+    uint32_t mask = (0xf << CP0SRSCtl_ESS) | (0xf << CP0SRSCtl_PSS);
+    env->CP0_SRSCtl = (env->CP0_SRSCtl & ~mask) | (arg1 & mask);
+}
+
+void helper_mtc0_cause(CPUMIPSState *env, target_ulong arg1)
+{
+    cpu_mips_store_cause(env, arg1);
+}
+
+void helper_mttc0_cause(CPUMIPSState *env, target_ulong arg1)
+{
+    int other_tc = env->CP0_VPEControl & (0xff << CP0VPECo_TargTC);
+    CPUMIPSState *other = mips_cpu_map_tc(env, &other_tc);
+
+    cpu_mips_store_cause(other, arg1);
+}
+
+target_ulong helper_mftc0_epc(CPUMIPSState *env)
+{
+    int other_tc = env->CP0_VPEControl & (0xff << CP0VPECo_TargTC);
+    CPUMIPSState *other = mips_cpu_map_tc(env, &other_tc);
+
+    return other->CP0_EPC;
+}
+
+target_ulong helper_mftc0_ebase(CPUMIPSState *env)
+{
+    int other_tc = env->CP0_VPEControl & (0xff << CP0VPECo_TargTC);
+    CPUMIPSState *other = mips_cpu_map_tc(env, &other_tc);
+
+    return other->CP0_EBase;
+}
+
+void helper_mtc0_ebase(CPUMIPSState *env, target_ulong arg1)
+{
+    target_ulong mask = 0x3FFFF000 | env->CP0_EBaseWG_rw_bitmask;
+    if (arg1 & env->CP0_EBaseWG_rw_bitmask) {
+        mask |= ~0x3FFFFFFF;
+    }
+    env->CP0_EBase = (env->CP0_EBase & ~mask) | (arg1 & mask);
+}
+
+void helper_mttc0_ebase(CPUMIPSState *env, target_ulong arg1)
+{
+    int other_tc = env->CP0_VPEControl & (0xff << CP0VPECo_TargTC);
+    CPUMIPSState *other = mips_cpu_map_tc(env, &other_tc);
+    target_ulong mask = 0x3FFFF000 | env->CP0_EBaseWG_rw_bitmask;
+    if (arg1 & env->CP0_EBaseWG_rw_bitmask) {
+        mask |= ~0x3FFFFFFF;
+    }
+    other->CP0_EBase = (other->CP0_EBase & ~mask) | (arg1 & mask);
+}
+
+target_ulong helper_mftc0_configx(CPUMIPSState *env, target_ulong idx)
+{
+    int other_tc = env->CP0_VPEControl & (0xff << CP0VPECo_TargTC);
+    CPUMIPSState *other = mips_cpu_map_tc(env, &other_tc);
+
+    switch (idx) {
+    case 0: return other->CP0_Config0;
+    case 1: return other->CP0_Config1;
+    case 2: return other->CP0_Config2;
+    case 3: return other->CP0_Config3;
+    /* 4 and 5 are reserved.  */
+    case 6: return other->CP0_Config6;
+    case 7: return other->CP0_Config7;
+    default:
+        break;
+    }
+    return 0;
+}
+
+void helper_mtc0_config0(CPUMIPSState *env, target_ulong arg1)
+{
+    env->CP0_Config0 = (env->CP0_Config0 & 0x81FFFFF8) | (arg1 & 0x00000007);
+}
+
+void helper_mtc0_config2(CPUMIPSState *env, target_ulong arg1)
+{
+    /* tertiary/secondary caches not implemented */
+    env->CP0_Config2 = (env->CP0_Config2 & 0x8FFF0FFF);
+}
+
+void helper_mtc0_config3(CPUMIPSState *env, target_ulong arg1)
+{
+    if (env->insn_flags & ASE_MICROMIPS) {
+        env->CP0_Config3 = (env->CP0_Config3 & ~(1 << CP0C3_ISA_ON_EXC)) |
+                           (arg1 & (1 << CP0C3_ISA_ON_EXC));
+    }
+}
+
+void helper_mtc0_config4(CPUMIPSState *env, target_ulong arg1)
+{
+    env->CP0_Config4 = (env->CP0_Config4 & (~env->CP0_Config4_rw_bitmask)) |
+                       (arg1 & env->CP0_Config4_rw_bitmask);
+}
+
+void helper_mtc0_config5(CPUMIPSState *env, target_ulong arg1)
+{
+    env->CP0_Config5 = (env->CP0_Config5 & (~env->CP0_Config5_rw_bitmask)) |
+                       (arg1 & env->CP0_Config5_rw_bitmask);
+    env->CP0_EntryHi_ASID_mask = (env->CP0_Config5 & (1 << CP0C5_MI)) ?
+            0x0 : (env->CP0_Config4 & (1 << CP0C4_AE)) ? 0x3ff : 0xff;
+    compute_hflags(env);
+}
+
+void helper_mtc0_lladdr(CPUMIPSState *env, target_ulong arg1)
+{
+    target_long mask = env->CP0_LLAddr_rw_bitmask;
+    arg1 = arg1 << env->CP0_LLAddr_shift;
+    env->CP0_LLAddr = (env->CP0_LLAddr & ~mask) | (arg1 & mask);
+}
+
+#define MTC0_MAAR_MASK(env) \
+        ((0x1ULL << 63) | ((env->PAMask >> 4) & ~0xFFFull) | 0x3)
+
+void helper_mtc0_maar(CPUMIPSState *env, target_ulong arg1)
+{
+    env->CP0_MAAR[env->CP0_MAARI] = arg1 & MTC0_MAAR_MASK(env);
+}
+
+void helper_mthc0_maar(CPUMIPSState *env, target_ulong arg1)
+{
+    env->CP0_MAAR[env->CP0_MAARI] =
+        (((uint64_t) arg1 << 32) & MTC0_MAAR_MASK(env)) |
+        (env->CP0_MAAR[env->CP0_MAARI] & 0x00000000ffffffffULL);
+}
+
+void helper_mtc0_maari(CPUMIPSState *env, target_ulong arg1)
+{
+    int index = arg1 & 0x3f;
+    if (index == 0x3f) {
+        /*
+         * Software may write all ones to INDEX to determine the
+         *  maximum value supported.
+         */
+        env->CP0_MAARI = MIPS_MAAR_MAX - 1;
+    } else if (index < MIPS_MAAR_MAX) {
+        env->CP0_MAARI = index;
+    }
+    /*
+     * Other than the all ones, if the value written is not supported,
+     * then INDEX is unchanged from its previous value.
+     */
+}
+
+void helper_mtc0_watchlo(CPUMIPSState *env, target_ulong arg1, uint32_t sel)
+{
+    /*
+     * Watch exceptions for instructions, data loads, data stores
+     * not implemented.
+     */
+    env->CP0_WatchLo[sel] = (arg1 & ~0x7);
+}
+
+void helper_mtc0_watchhi(CPUMIPSState *env, target_ulong arg1, uint32_t sel)
+{
+    uint64_t mask = 0x40000FF8 | (env->CP0_EntryHi_ASID_mask << CP0WH_ASID);
+    if ((env->CP0_Config5 >> CP0C5_MI) & 1) {
+        mask |= 0xFFFFFFFF00000000ULL; /* MMID */
+    }
+    env->CP0_WatchHi[sel] = arg1 & mask;
+    env->CP0_WatchHi[sel] &= ~(env->CP0_WatchHi[sel] & arg1 & 0x7);
+}
+
+void helper_mthc0_watchhi(CPUMIPSState *env, target_ulong arg1, uint32_t sel)
+{
+    env->CP0_WatchHi[sel] = ((uint64_t) (arg1) << 32) |
+                            (env->CP0_WatchHi[sel] & 0x00000000ffffffffULL);
+}
+
+void helper_mtc0_xcontext(CPUMIPSState *env, target_ulong arg1)
+{
+    target_ulong mask = (1ULL << (env->SEGBITS - 7)) - 1;
+    env->CP0_XContext = (env->CP0_XContext & mask) | (arg1 & ~mask);
+}
+
+void helper_mtc0_framemask(CPUMIPSState *env, target_ulong arg1)
+{
+    env->CP0_Framemask = arg1; /* XXX */
+}
+
+void helper_mtc0_debug(CPUMIPSState *env, target_ulong arg1)
+{
+    env->CP0_Debug = (env->CP0_Debug & 0x8C03FC1F) | (arg1 & 0x13300120);
+    if (arg1 & (1 << CP0DB_DM)) {
+        env->hflags |= MIPS_HFLAG_DM;
+    } else {
+        env->hflags &= ~MIPS_HFLAG_DM;
+    }
+}
+
+void helper_mttc0_debug(CPUMIPSState *env, target_ulong arg1)
+{
+    int other_tc = env->CP0_VPEControl & (0xff << CP0VPECo_TargTC);
+    uint32_t val = arg1 & ((1 << CP0DB_SSt) | (1 << CP0DB_Halt));
+    CPUMIPSState *other = mips_cpu_map_tc(env, &other_tc);
+
+    /* XXX: Might be wrong, check with EJTAG spec. */
+    if (other_tc == other->current_tc) {
+        other->active_tc.CP0_Debug_tcstatus = val;
+    } else {
+        other->tcs[other_tc].CP0_Debug_tcstatus = val;
+    }
+    other->CP0_Debug = (other->CP0_Debug &
+                     ((1 << CP0DB_SSt) | (1 << CP0DB_Halt))) |
+                     (arg1 & ~((1 << CP0DB_SSt) | (1 << CP0DB_Halt)));
+}
+
+void helper_mtc0_performance0(CPUMIPSState *env, target_ulong arg1)
+{
+    env->CP0_Performance0 = arg1 & 0x000007ff;
+}
+
+void helper_mtc0_errctl(CPUMIPSState *env, target_ulong arg1)
+{
+    int32_t wst = arg1 & (1 << CP0EC_WST);
+    int32_t spr = arg1 & (1 << CP0EC_SPR);
+    int32_t itc = env->itc_tag ? (arg1 & (1 << CP0EC_ITC)) : 0;
+
+    env->CP0_ErrCtl = wst | spr | itc;
+
+    if (itc && !wst && !spr) {
+        env->hflags |= MIPS_HFLAG_ITC_CACHE;
+    } else {
+        env->hflags &= ~MIPS_HFLAG_ITC_CACHE;
+    }
+}
+
+void helper_mtc0_taglo(CPUMIPSState *env, target_ulong arg1)
+{
+    if (env->hflags & MIPS_HFLAG_ITC_CACHE) {
+        /*
+         * If CACHE instruction is configured for ITC tags then make all
+         * CP0.TagLo bits writable. The actual write to ITC Configuration
+         * Tag will take care of the read-only bits.
+         */
+        env->CP0_TagLo = arg1;
+    } else {
+        env->CP0_TagLo = arg1 & 0xFFFFFCF6;
+    }
+}
+
+void helper_mtc0_datalo(CPUMIPSState *env, target_ulong arg1)
+{
+    env->CP0_DataLo = arg1; /* XXX */
+}
+
+void helper_mtc0_taghi(CPUMIPSState *env, target_ulong arg1)
+{
+    env->CP0_TagHi = arg1; /* XXX */
+}
+
+void helper_mtc0_datahi(CPUMIPSState *env, target_ulong arg1)
+{
+    env->CP0_DataHi = arg1; /* XXX */
+}
+
+/* MIPS MT functions */
+target_ulong helper_mftgpr(CPUMIPSState *env, uint32_t sel)
+{
+    int other_tc = env->CP0_VPEControl & (0xff << CP0VPECo_TargTC);
+    CPUMIPSState *other = mips_cpu_map_tc(env, &other_tc);
+
+    if (other_tc == other->current_tc) {
+        return other->active_tc.gpr[sel];
+    } else {
+        return other->tcs[other_tc].gpr[sel];
+    }
+}
+
+target_ulong helper_mftlo(CPUMIPSState *env, uint32_t sel)
+{
+    int other_tc = env->CP0_VPEControl & (0xff << CP0VPECo_TargTC);
+    CPUMIPSState *other = mips_cpu_map_tc(env, &other_tc);
+
+    if (other_tc == other->current_tc) {
+        return other->active_tc.LO[sel];
+    } else {
+        return other->tcs[other_tc].LO[sel];
+    }
+}
+
+target_ulong helper_mfthi(CPUMIPSState *env, uint32_t sel)
+{
+    int other_tc = env->CP0_VPEControl & (0xff << CP0VPECo_TargTC);
+    CPUMIPSState *other = mips_cpu_map_tc(env, &other_tc);
+
+    if (other_tc == other->current_tc) {
+        return other->active_tc.HI[sel];
+    } else {
+        return other->tcs[other_tc].HI[sel];
+    }
+}
+
+target_ulong helper_mftacx(CPUMIPSState *env, uint32_t sel)
+{
+    int other_tc = env->CP0_VPEControl & (0xff << CP0VPECo_TargTC);
+    CPUMIPSState *other = mips_cpu_map_tc(env, &other_tc);
+
+    if (other_tc == other->current_tc) {
+        return other->active_tc.ACX[sel];
+    } else {
+        return other->tcs[other_tc].ACX[sel];
+    }
+}
+
+target_ulong helper_mftdsp(CPUMIPSState *env)
+{
+    int other_tc = env->CP0_VPEControl & (0xff << CP0VPECo_TargTC);
+    CPUMIPSState *other = mips_cpu_map_tc(env, &other_tc);
+
+    if (other_tc == other->current_tc) {
+        return other->active_tc.DSPControl;
+    } else {
+        return other->tcs[other_tc].DSPControl;
+    }
+}
+
+void helper_mttgpr(CPUMIPSState *env, target_ulong arg1, uint32_t sel)
+{
+    int other_tc = env->CP0_VPEControl & (0xff << CP0VPECo_TargTC);
+    CPUMIPSState *other = mips_cpu_map_tc(env, &other_tc);
+
+    if (other_tc == other->current_tc) {
+        other->active_tc.gpr[sel] = arg1;
+    } else {
+        other->tcs[other_tc].gpr[sel] = arg1;
+    }
+}
+
+void helper_mttlo(CPUMIPSState *env, target_ulong arg1, uint32_t sel)
+{
+    int other_tc = env->CP0_VPEControl & (0xff << CP0VPECo_TargTC);
+    CPUMIPSState *other = mips_cpu_map_tc(env, &other_tc);
+
+    if (other_tc == other->current_tc) {
+        other->active_tc.LO[sel] = arg1;
+    } else {
+        other->tcs[other_tc].LO[sel] = arg1;
+    }
+}
+
+void helper_mtthi(CPUMIPSState *env, target_ulong arg1, uint32_t sel)
+{
+    int other_tc = env->CP0_VPEControl & (0xff << CP0VPECo_TargTC);
+    CPUMIPSState *other = mips_cpu_map_tc(env, &other_tc);
+
+    if (other_tc == other->current_tc) {
+        other->active_tc.HI[sel] = arg1;
+    } else {
+        other->tcs[other_tc].HI[sel] = arg1;
+    }
+}
+
+void helper_mttacx(CPUMIPSState *env, target_ulong arg1, uint32_t sel)
+{
+    int other_tc = env->CP0_VPEControl & (0xff << CP0VPECo_TargTC);
+    CPUMIPSState *other = mips_cpu_map_tc(env, &other_tc);
+
+    if (other_tc == other->current_tc) {
+        other->active_tc.ACX[sel] = arg1;
+    } else {
+        other->tcs[other_tc].ACX[sel] = arg1;
+    }
+}
+
+void helper_mttdsp(CPUMIPSState *env, target_ulong arg1)
+{
+    int other_tc = env->CP0_VPEControl & (0xff << CP0VPECo_TargTC);
+    CPUMIPSState *other = mips_cpu_map_tc(env, &other_tc);
+
+    if (other_tc == other->current_tc) {
+        other->active_tc.DSPControl = arg1;
+    } else {
+        other->tcs[other_tc].DSPControl = arg1;
+    }
+}
+
+/* MIPS MT functions */
+target_ulong helper_dmt(void)
+{
+    /* TODO */
+    return 0;
+}
+
+target_ulong helper_emt(void)
+{
+    /* TODO */
+    return 0;
+}
+
+target_ulong helper_dvpe(CPUMIPSState *env)
+{
+    CPUState *other_cs = first_cpu;
+    target_ulong prev = env->mvp->CP0_MVPControl;
+
+    CPU_FOREACH(other_cs) {
+        MIPSCPU *other_cpu = MIPS_CPU(other_cs);
+        /* Turn off all VPEs except the one executing the dvpe.  */
+        if (&other_cpu->env != env) {
+            other_cpu->env.mvp->CP0_MVPControl &= ~(1 << CP0MVPCo_EVP);
+            mips_vpe_sleep(other_cpu);
+        }
+    }
+    return prev;
+}
+
+target_ulong helper_evpe(CPUMIPSState *env)
+{
+    CPUState *other_cs = first_cpu;
+    target_ulong prev = env->mvp->CP0_MVPControl;
+
+    CPU_FOREACH(other_cs) {
+        MIPSCPU *other_cpu = MIPS_CPU(other_cs);
+
+        if (&other_cpu->env != env
+            /* If the VPE is WFI, don't disturb its sleep.  */
+            && !mips_vpe_is_wfi(other_cpu)) {
+            /* Enable the VPE.  */
+            other_cpu->env.mvp->CP0_MVPControl |= (1 << CP0MVPCo_EVP);
+            mips_vpe_wake(other_cpu); /* And wake it up.  */
+        }
+    }
+    return prev;
+}
+#endif /* !CONFIG_USER_ONLY */
+
+/* R6 Multi-threading */
+#ifndef CONFIG_USER_ONLY
+target_ulong helper_dvp(CPUMIPSState *env)
+{
+    CPUState *other_cs = first_cpu;
+    target_ulong prev = env->CP0_VPControl;
+
+    if (!((env->CP0_VPControl >> CP0VPCtl_DIS) & 1)) {
+        CPU_FOREACH(other_cs) {
+            MIPSCPU *other_cpu = MIPS_CPU(other_cs);
+            /* Turn off all VPs except the one executing the dvp. */
+            if (&other_cpu->env != env) {
+                mips_vpe_sleep(other_cpu);
+            }
+        }
+        env->CP0_VPControl |= (1 << CP0VPCtl_DIS);
+    }
+    return prev;
+}
+
+target_ulong helper_evp(CPUMIPSState *env)
+{
+    CPUState *other_cs = first_cpu;
+    target_ulong prev = env->CP0_VPControl;
+
+    if ((env->CP0_VPControl >> CP0VPCtl_DIS) & 1) {
+        CPU_FOREACH(other_cs) {
+            MIPSCPU *other_cpu = MIPS_CPU(other_cs);
+            if ((&other_cpu->env != env) && !mips_vp_is_wfi(other_cpu)) {
+                /*
+                 * If the VP is WFI, don't disturb its sleep.
+                 * Otherwise, wake it up.
+                 */
+                mips_vpe_wake(other_cpu);
+            }
+        }
+        env->CP0_VPControl &= ~(1 << CP0VPCtl_DIS);
+    }
+    return prev;
+}
+#endif /* !CONFIG_USER_ONLY */
diff --git a/target/mips/op_helper.c b/target/mips/op_helper.c
index 467914d..27c3963 100644
--- a/target/mips/op_helper.c
+++ b/target/mips/op_helper.c
@@ -15,7 +15,9 @@
  *
  * You should have received a copy of the GNU Lesser General Public
  * License along with this library; if not, see <http://www.gnu.org/licenses/>.
+ *
  */
+
 #include "qemu/osdep.h"
 #include "qemu/main-loop.h"
 #include "cpu.h"
@@ -28,6 +30,7 @@
 #include "sysemu/kvm.h"
 #include "fpu/softfloat.h"
 
+
 /*****************************************************************************/
 /* Exceptions processing helpers */
 
@@ -560,1689 +563,45 @@ void helper_sdm(CPUMIPSState *env, target_ulong addr, target_ulong reglist,
 }
 #endif
 
-#ifndef CONFIG_USER_ONLY
-/* SMP helpers.  */
-static bool mips_vpe_is_wfi(MIPSCPU *c)
-{
-    CPUState *cpu = CPU(c);
-    CPUMIPSState *env = &c->env;
-
-    /*
-     * If the VPE is halted but otherwise active, it means it's waiting for
-     * an interrupt.\
-     */
-    return cpu->halted && mips_vpe_active(env);
-}
-
-static bool mips_vp_is_wfi(MIPSCPU *c)
-{
-    CPUState *cpu = CPU(c);
-    CPUMIPSState *env = &c->env;
-
-    return cpu->halted && mips_vp_active(env);
-}
-
-static inline void mips_vpe_wake(MIPSCPU *c)
-{
-    /*
-     * Don't set ->halted = 0 directly, let it be done via cpu_has_work
-     * because there might be other conditions that state that c should
-     * be sleeping.
-     */
-    qemu_mutex_lock_iothread();
-    cpu_interrupt(CPU(c), CPU_INTERRUPT_WAKE);
-    qemu_mutex_unlock_iothread();
-}
 
-static inline void mips_vpe_sleep(MIPSCPU *cpu)
+void helper_fork(target_ulong arg1, target_ulong arg2)
 {
-    CPUState *cs = CPU(cpu);
-
     /*
-     * The VPE was shut off, really go to bed.
-     * Reset any old _WAKE requests.
+     * arg1 = rt, arg2 = rs
+     * TODO: store to TC register
      */
-    cs->halted = 1;
-    cpu_reset_interrupt(cs, CPU_INTERRUPT_WAKE);
-}
-
-static inline void mips_tc_wake(MIPSCPU *cpu, int tc)
-{
-    CPUMIPSState *c = &cpu->env;
-
-    /* FIXME: TC reschedule.  */
-    if (mips_vpe_active(c) && !mips_vpe_is_wfi(cpu)) {
-        mips_vpe_wake(cpu);
-    }
-}
-
-static inline void mips_tc_sleep(MIPSCPU *cpu, int tc)
-{
-    CPUMIPSState *c = &cpu->env;
-
-    /* FIXME: TC reschedule.  */
-    if (!mips_vpe_active(c)) {
-        mips_vpe_sleep(cpu);
-    }
-}
-
-/**
- * mips_cpu_map_tc:
- * @env: CPU from which mapping is performed.
- * @tc: Should point to an int with the value of the global TC index.
- *
- * This function will transform @tc into a local index within the
- * returned #CPUMIPSState.
- */
-
-/*
- * FIXME: This code assumes that all VPEs have the same number of TCs,
- *        which depends on runtime setup. Can probably be fixed by
- *        walking the list of CPUMIPSStates.
- */
-static CPUMIPSState *mips_cpu_map_tc(CPUMIPSState *env, int *tc)
-{
-    MIPSCPU *cpu;
-    CPUState *cs;
-    CPUState *other_cs;
-    int vpe_idx;
-    int tc_idx = *tc;
-
-    if (!(env->CP0_VPEConf0 & (1 << CP0VPEC0_MVP))) {
-        /* Not allowed to address other CPUs.  */
-        *tc = env->current_tc;
-        return env;
-    }
-
-    cs = env_cpu(env);
-    vpe_idx = tc_idx / cs->nr_threads;
-    *tc = tc_idx % cs->nr_threads;
-    other_cs = qemu_get_cpu(vpe_idx);
-    if (other_cs == NULL) {
-        return env;
-    }
-    cpu = MIPS_CPU(other_cs);
-    return &cpu->env;
-}
-
-/*
- * The per VPE CP0_Status register shares some fields with the per TC
- * CP0_TCStatus registers. These fields are wired to the same registers,
- * so changes to either of them should be reflected on both registers.
- *
- * Also, EntryHi shares the bottom 8 bit ASID with TCStauts.
- *
- * These helper call synchronizes the regs for a given cpu.
- */
-
-/*
- * Called for updates to CP0_Status.  Defined in "cpu.h" for gdbstub.c.
- * static inline void sync_c0_status(CPUMIPSState *env, CPUMIPSState *cpu,
- *                                   int tc);
- */
-
-/* Called for updates to CP0_TCStatus.  */
-static void sync_c0_tcstatus(CPUMIPSState *cpu, int tc,
-                             target_ulong v)
-{
-    uint32_t status;
-    uint32_t tcu, tmx, tasid, tksu;
-    uint32_t mask = ((1U << CP0St_CU3)
-                       | (1 << CP0St_CU2)
-                       | (1 << CP0St_CU1)
-                       | (1 << CP0St_CU0)
-                       | (1 << CP0St_MX)
-                       | (3 << CP0St_KSU));
-
-    tcu = (v >> CP0TCSt_TCU0) & 0xf;
-    tmx = (v >> CP0TCSt_TMX) & 0x1;
-    tasid = v & cpu->CP0_EntryHi_ASID_mask;
-    tksu = (v >> CP0TCSt_TKSU) & 0x3;
-
-    status = tcu << CP0St_CU0;
-    status |= tmx << CP0St_MX;
-    status |= tksu << CP0St_KSU;
-
-    cpu->CP0_Status &= ~mask;
-    cpu->CP0_Status |= status;
-
-    /* Sync the TASID with EntryHi.  */
-    cpu->CP0_EntryHi &= ~cpu->CP0_EntryHi_ASID_mask;
-    cpu->CP0_EntryHi |= tasid;
-
-    compute_hflags(cpu);
-}
-
-/* Called for updates to CP0_EntryHi.  */
-static void sync_c0_entryhi(CPUMIPSState *cpu, int tc)
-{
-    int32_t *tcst;
-    uint32_t asid, v = cpu->CP0_EntryHi;
-
-    asid = v & cpu->CP0_EntryHi_ASID_mask;
-
-    if (tc == cpu->current_tc) {
-        tcst = &cpu->active_tc.CP0_TCStatus;
-    } else {
-        tcst = &cpu->tcs[tc].CP0_TCStatus;
-    }
-
-    *tcst &= ~cpu->CP0_EntryHi_ASID_mask;
-    *tcst |= asid;
-}
-
-/* CP0 helpers */
-target_ulong helper_mfc0_mvpcontrol(CPUMIPSState *env)
-{
-    return env->mvp->CP0_MVPControl;
-}
-
-target_ulong helper_mfc0_mvpconf0(CPUMIPSState *env)
-{
-    return env->mvp->CP0_MVPConf0;
-}
-
-target_ulong helper_mfc0_mvpconf1(CPUMIPSState *env)
-{
-    return env->mvp->CP0_MVPConf1;
-}
-
-target_ulong helper_mfc0_random(CPUMIPSState *env)
-{
-    return (int32_t)cpu_mips_get_random(env);
-}
-
-target_ulong helper_mfc0_tcstatus(CPUMIPSState *env)
-{
-    return env->active_tc.CP0_TCStatus;
-}
-
-target_ulong helper_mftc0_tcstatus(CPUMIPSState *env)
-{
-    int other_tc = env->CP0_VPEControl & (0xff << CP0VPECo_TargTC);
-    CPUMIPSState *other = mips_cpu_map_tc(env, &other_tc);
-
-    if (other_tc == other->current_tc) {
-        return other->active_tc.CP0_TCStatus;
-    } else {
-        return other->tcs[other_tc].CP0_TCStatus;
-    }
-}
-
-target_ulong helper_mfc0_tcbind(CPUMIPSState *env)
-{
-    return env->active_tc.CP0_TCBind;
-}
-
-target_ulong helper_mftc0_tcbind(CPUMIPSState *env)
-{
-    int other_tc = env->CP0_VPEControl & (0xff << CP0VPECo_TargTC);
-    CPUMIPSState *other = mips_cpu_map_tc(env, &other_tc);
-
-    if (other_tc == other->current_tc) {
-        return other->active_tc.CP0_TCBind;
-    } else {
-        return other->tcs[other_tc].CP0_TCBind;
-    }
-}
-
-target_ulong helper_mfc0_tcrestart(CPUMIPSState *env)
-{
-    return env->active_tc.PC;
-}
-
-target_ulong helper_mftc0_tcrestart(CPUMIPSState *env)
-{
-    int other_tc = env->CP0_VPEControl & (0xff << CP0VPECo_TargTC);
-    CPUMIPSState *other = mips_cpu_map_tc(env, &other_tc);
-
-    if (other_tc == other->current_tc) {
-        return other->active_tc.PC;
-    } else {
-        return other->tcs[other_tc].PC;
-    }
-}
-
-target_ulong helper_mfc0_tchalt(CPUMIPSState *env)
-{
-    return env->active_tc.CP0_TCHalt;
-}
-
-target_ulong helper_mftc0_tchalt(CPUMIPSState *env)
-{
-    int other_tc = env->CP0_VPEControl & (0xff << CP0VPECo_TargTC);
-    CPUMIPSState *other = mips_cpu_map_tc(env, &other_tc);
-
-    if (other_tc == other->current_tc) {
-        return other->active_tc.CP0_TCHalt;
-    } else {
-        return other->tcs[other_tc].CP0_TCHalt;
-    }
-}
-
-target_ulong helper_mfc0_tccontext(CPUMIPSState *env)
-{
-    return env->active_tc.CP0_TCContext;
-}
-
-target_ulong helper_mftc0_tccontext(CPUMIPSState *env)
-{
-    int other_tc = env->CP0_VPEControl & (0xff << CP0VPECo_TargTC);
-    CPUMIPSState *other = mips_cpu_map_tc(env, &other_tc);
-
-    if (other_tc == other->current_tc) {
-        return other->active_tc.CP0_TCContext;
-    } else {
-        return other->tcs[other_tc].CP0_TCContext;
-    }
-}
-
-target_ulong helper_mfc0_tcschedule(CPUMIPSState *env)
-{
-    return env->active_tc.CP0_TCSchedule;
 }
 
-target_ulong helper_mftc0_tcschedule(CPUMIPSState *env)
-{
-    int other_tc = env->CP0_VPEControl & (0xff << CP0VPECo_TargTC);
-    CPUMIPSState *other = mips_cpu_map_tc(env, &other_tc);
-
-    if (other_tc == other->current_tc) {
-        return other->active_tc.CP0_TCSchedule;
-    } else {
-        return other->tcs[other_tc].CP0_TCSchedule;
-    }
-}
-
-target_ulong helper_mfc0_tcschefback(CPUMIPSState *env)
-{
-    return env->active_tc.CP0_TCScheFBack;
-}
-
-target_ulong helper_mftc0_tcschefback(CPUMIPSState *env)
-{
-    int other_tc = env->CP0_VPEControl & (0xff << CP0VPECo_TargTC);
-    CPUMIPSState *other = mips_cpu_map_tc(env, &other_tc);
-
-    if (other_tc == other->current_tc) {
-        return other->active_tc.CP0_TCScheFBack;
-    } else {
-        return other->tcs[other_tc].CP0_TCScheFBack;
-    }
-}
-
-target_ulong helper_mfc0_count(CPUMIPSState *env)
-{
-    return (int32_t)cpu_mips_get_count(env);
-}
-
-target_ulong helper_mfc0_saar(CPUMIPSState *env)
-{
-    if ((env->CP0_SAARI & 0x3f) < 2) {
-        return (int32_t) env->CP0_SAAR[env->CP0_SAARI & 0x3f];
-    }
-    return 0;
-}
-
-target_ulong helper_mfhc0_saar(CPUMIPSState *env)
-{
-    if ((env->CP0_SAARI & 0x3f) < 2) {
-        return env->CP0_SAAR[env->CP0_SAARI & 0x3f] >> 32;
-    }
-    return 0;
-}
-
-target_ulong helper_mftc0_entryhi(CPUMIPSState *env)
-{
-    int other_tc = env->CP0_VPEControl & (0xff << CP0VPECo_TargTC);
-    CPUMIPSState *other = mips_cpu_map_tc(env, &other_tc);
-
-    return other->CP0_EntryHi;
-}
-
-target_ulong helper_mftc0_cause(CPUMIPSState *env)
-{
-    int other_tc = env->CP0_VPEControl & (0xff << CP0VPECo_TargTC);
-    int32_t tccause;
-    CPUMIPSState *other = mips_cpu_map_tc(env, &other_tc);
-
-    if (other_tc == other->current_tc) {
-        tccause = other->CP0_Cause;
-    } else {
-        tccause = other->CP0_Cause;
-    }
-
-    return tccause;
-}
-
-target_ulong helper_mftc0_status(CPUMIPSState *env)
-{
-    int other_tc = env->CP0_VPEControl & (0xff << CP0VPECo_TargTC);
-    CPUMIPSState *other = mips_cpu_map_tc(env, &other_tc);
-
-    return other->CP0_Status;
-}
-
-target_ulong helper_mfc0_lladdr(CPUMIPSState *env)
-{
-    return (int32_t)(env->CP0_LLAddr >> env->CP0_LLAddr_shift);
-}
-
-target_ulong helper_mfc0_maar(CPUMIPSState *env)
-{
-    return (int32_t) env->CP0_MAAR[env->CP0_MAARI];
-}
-
-target_ulong helper_mfhc0_maar(CPUMIPSState *env)
-{
-    return env->CP0_MAAR[env->CP0_MAARI] >> 32;
-}
-
-target_ulong helper_mfc0_watchlo(CPUMIPSState *env, uint32_t sel)
-{
-    return (int32_t)env->CP0_WatchLo[sel];
-}
-
-target_ulong helper_mfc0_watchhi(CPUMIPSState *env, uint32_t sel)
-{
-    return (int32_t) env->CP0_WatchHi[sel];
-}
-
-target_ulong helper_mfhc0_watchhi(CPUMIPSState *env, uint32_t sel)
-{
-    return env->CP0_WatchHi[sel] >> 32;
-}
-
-target_ulong helper_mfc0_debug(CPUMIPSState *env)
-{
-    target_ulong t0 = env->CP0_Debug;
-    if (env->hflags & MIPS_HFLAG_DM) {
-        t0 |= 1 << CP0DB_DM;
-    }
-
-    return t0;
-}
-
-target_ulong helper_mftc0_debug(CPUMIPSState *env)
-{
-    int other_tc = env->CP0_VPEControl & (0xff << CP0VPECo_TargTC);
-    int32_t tcstatus;
-    CPUMIPSState *other = mips_cpu_map_tc(env, &other_tc);
-
-    if (other_tc == other->current_tc) {
-        tcstatus = other->active_tc.CP0_Debug_tcstatus;
-    } else {
-        tcstatus = other->tcs[other_tc].CP0_Debug_tcstatus;
-    }
-
-    /* XXX: Might be wrong, check with EJTAG spec. */
-    return (other->CP0_Debug & ~((1 << CP0DB_SSt) | (1 << CP0DB_Halt))) |
-            (tcstatus & ((1 << CP0DB_SSt) | (1 << CP0DB_Halt)));
-}
-
-#if defined(TARGET_MIPS64)
-target_ulong helper_dmfc0_tcrestart(CPUMIPSState *env)
-{
-    return env->active_tc.PC;
-}
-
-target_ulong helper_dmfc0_tchalt(CPUMIPSState *env)
-{
-    return env->active_tc.CP0_TCHalt;
-}
-
-target_ulong helper_dmfc0_tccontext(CPUMIPSState *env)
-{
-    return env->active_tc.CP0_TCContext;
-}
-
-target_ulong helper_dmfc0_tcschedule(CPUMIPSState *env)
-{
-    return env->active_tc.CP0_TCSchedule;
-}
-
-target_ulong helper_dmfc0_tcschefback(CPUMIPSState *env)
-{
-    return env->active_tc.CP0_TCScheFBack;
-}
-
-target_ulong helper_dmfc0_lladdr(CPUMIPSState *env)
-{
-    return env->CP0_LLAddr >> env->CP0_LLAddr_shift;
-}
-
-target_ulong helper_dmfc0_maar(CPUMIPSState *env)
-{
-    return env->CP0_MAAR[env->CP0_MAARI];
-}
-
-target_ulong helper_dmfc0_watchlo(CPUMIPSState *env, uint32_t sel)
-{
-    return env->CP0_WatchLo[sel];
-}
-
-target_ulong helper_dmfc0_watchhi(CPUMIPSState *env, uint32_t sel)
+target_ulong helper_yield(CPUMIPSState *env, target_ulong arg)
 {
-    return env->CP0_WatchHi[sel];
-}
+    target_long arg1 = arg;
 
-target_ulong helper_dmfc0_saar(CPUMIPSState *env)
-{
-    if ((env->CP0_SAARI & 0x3f) < 2) {
-        return env->CP0_SAAR[env->CP0_SAARI & 0x3f];
+    if (arg1 < 0) {
+        /* No scheduling policy implemented. */
+        if (arg1 != -2) {
+            if (env->CP0_VPEControl & (1 << CP0VPECo_YSI) &&
+                env->active_tc.CP0_TCStatus & (1 << CP0TCSt_DT)) {
+                env->CP0_VPEControl &= ~(0x7 << CP0VPECo_EXCPT);
+                env->CP0_VPEControl |= 4 << CP0VPECo_EXCPT;
+                do_raise_exception(env, EXCP_THREAD, GETPC());
+            }
+        }
+    } else if (arg1 == 0) {
+        if (0) {
+            /* TODO: TC underflow */
+            env->CP0_VPEControl &= ~(0x7 << CP0VPECo_EXCPT);
+            do_raise_exception(env, EXCP_THREAD, GETPC());
+        } else {
+            /* TODO: Deallocate TC */
+        }
+    } else if (arg1 > 0) {
+        /* Yield qualifier inputs not implemented. */
+        env->CP0_VPEControl &= ~(0x7 << CP0VPECo_EXCPT);
+        env->CP0_VPEControl |= 2 << CP0VPECo_EXCPT;
+        do_raise_exception(env, EXCP_THREAD, GETPC());
     }
-    return 0;
+    return env->CP0_YQMask;
 }
-#endif /* TARGET_MIPS64 */
-
-void helper_mtc0_index(CPUMIPSState *env, target_ulong arg1)
-{
-    uint32_t index_p = env->CP0_Index & 0x80000000;
-    uint32_t tlb_index = arg1 & 0x7fffffff;
-    if (tlb_index < env->tlb->nb_tlb) {
-        if (env->insn_flags & ISA_MIPS32R6) {
-            index_p |= arg1 & 0x80000000;
-        }
-        env->CP0_Index = index_p | tlb_index;
-    }
-}
-
-void helper_mtc0_mvpcontrol(CPUMIPSState *env, target_ulong arg1)
-{
-    uint32_t mask = 0;
-    uint32_t newval;
-
-    if (env->CP0_VPEConf0 & (1 << CP0VPEC0_MVP)) {
-        mask |= (1 << CP0MVPCo_CPA) | (1 << CP0MVPCo_VPC) |
-                (1 << CP0MVPCo_EVP);
-    }
-    if (env->mvp->CP0_MVPControl & (1 << CP0MVPCo_VPC)) {
-        mask |= (1 << CP0MVPCo_STLB);
-    }
-    newval = (env->mvp->CP0_MVPControl & ~mask) | (arg1 & mask);
-
-    /* TODO: Enable/disable shared TLB, enable/disable VPEs. */
-
-    env->mvp->CP0_MVPControl = newval;
-}
-
-void helper_mtc0_vpecontrol(CPUMIPSState *env, target_ulong arg1)
-{
-    uint32_t mask;
-    uint32_t newval;
-
-    mask = (1 << CP0VPECo_YSI) | (1 << CP0VPECo_GSI) |
-           (1 << CP0VPECo_TE) | (0xff << CP0VPECo_TargTC);
-    newval = (env->CP0_VPEControl & ~mask) | (arg1 & mask);
-
-    /*
-     * Yield scheduler intercept not implemented.
-     * Gating storage scheduler intercept not implemented.
-     */
-
-    /* TODO: Enable/disable TCs. */
-
-    env->CP0_VPEControl = newval;
-}
-
-void helper_mttc0_vpecontrol(CPUMIPSState *env, target_ulong arg1)
-{
-    int other_tc = env->CP0_VPEControl & (0xff << CP0VPECo_TargTC);
-    CPUMIPSState *other = mips_cpu_map_tc(env, &other_tc);
-    uint32_t mask;
-    uint32_t newval;
-
-    mask = (1 << CP0VPECo_YSI) | (1 << CP0VPECo_GSI) |
-           (1 << CP0VPECo_TE) | (0xff << CP0VPECo_TargTC);
-    newval = (other->CP0_VPEControl & ~mask) | (arg1 & mask);
-
-    /* TODO: Enable/disable TCs.  */
-
-    other->CP0_VPEControl = newval;
-}
-
-target_ulong helper_mftc0_vpecontrol(CPUMIPSState *env)
-{
-    int other_tc = env->CP0_VPEControl & (0xff << CP0VPECo_TargTC);
-    CPUMIPSState *other = mips_cpu_map_tc(env, &other_tc);
-    /* FIXME: Mask away return zero on read bits.  */
-    return other->CP0_VPEControl;
-}
-
-target_ulong helper_mftc0_vpeconf0(CPUMIPSState *env)
-{
-    int other_tc = env->CP0_VPEControl & (0xff << CP0VPECo_TargTC);
-    CPUMIPSState *other = mips_cpu_map_tc(env, &other_tc);
-
-    return other->CP0_VPEConf0;
-}
-
-void helper_mtc0_vpeconf0(CPUMIPSState *env, target_ulong arg1)
-{
-    uint32_t mask = 0;
-    uint32_t newval;
-
-    if (env->CP0_VPEConf0 & (1 << CP0VPEC0_MVP)) {
-        if (env->CP0_VPEConf0 & (1 << CP0VPEC0_VPA)) {
-            mask |= (0xff << CP0VPEC0_XTC);
-        }
-        mask |= (1 << CP0VPEC0_MVP) | (1 << CP0VPEC0_VPA);
-    }
-    newval = (env->CP0_VPEConf0 & ~mask) | (arg1 & mask);
-
-    /* TODO: TC exclusive handling due to ERL/EXL. */
-
-    env->CP0_VPEConf0 = newval;
-}
-
-void helper_mttc0_vpeconf0(CPUMIPSState *env, target_ulong arg1)
-{
-    int other_tc = env->CP0_VPEControl & (0xff << CP0VPECo_TargTC);
-    CPUMIPSState *other = mips_cpu_map_tc(env, &other_tc);
-    uint32_t mask = 0;
-    uint32_t newval;
-
-    mask |= (1 << CP0VPEC0_MVP) | (1 << CP0VPEC0_VPA);
-    newval = (other->CP0_VPEConf0 & ~mask) | (arg1 & mask);
-
-    /* TODO: TC exclusive handling due to ERL/EXL.  */
-    other->CP0_VPEConf0 = newval;
-}
-
-void helper_mtc0_vpeconf1(CPUMIPSState *env, target_ulong arg1)
-{
-    uint32_t mask = 0;
-    uint32_t newval;
-
-    if (env->mvp->CP0_MVPControl & (1 << CP0MVPCo_VPC))
-        mask |= (0xff << CP0VPEC1_NCX) | (0xff << CP0VPEC1_NCP2) |
-                (0xff << CP0VPEC1_NCP1);
-    newval = (env->CP0_VPEConf1 & ~mask) | (arg1 & mask);
-
-    /* UDI not implemented. */
-    /* CP2 not implemented. */
-
-    /* TODO: Handle FPU (CP1) binding. */
-
-    env->CP0_VPEConf1 = newval;
-}
-
-void helper_mtc0_yqmask(CPUMIPSState *env, target_ulong arg1)
-{
-    /* Yield qualifier inputs not implemented. */
-    env->CP0_YQMask = 0x00000000;
-}
-
-void helper_mtc0_vpeopt(CPUMIPSState *env, target_ulong arg1)
-{
-    env->CP0_VPEOpt = arg1 & 0x0000ffff;
-}
-
-#define MTC0_ENTRYLO_MASK(env) ((env->PAMask >> 6) & 0x3FFFFFFF)
-
-void helper_mtc0_entrylo0(CPUMIPSState *env, target_ulong arg1)
-{
-    /* 1k pages not implemented */
-    target_ulong rxi = arg1 & (env->CP0_PageGrain & (3u << CP0PG_XIE));
-    env->CP0_EntryLo0 = (arg1 & MTC0_ENTRYLO_MASK(env))
-                        | (rxi << (CP0EnLo_XI - 30));
-}
-
-#if defined(TARGET_MIPS64)
-#define DMTC0_ENTRYLO_MASK(env) (env->PAMask >> 6)
-
-void helper_dmtc0_entrylo0(CPUMIPSState *env, uint64_t arg1)
-{
-    uint64_t rxi = arg1 & ((env->CP0_PageGrain & (3ull << CP0PG_XIE)) << 32);
-    env->CP0_EntryLo0 = (arg1 & DMTC0_ENTRYLO_MASK(env)) | rxi;
-}
-#endif
-
-void helper_mtc0_tcstatus(CPUMIPSState *env, target_ulong arg1)
-{
-    uint32_t mask = env->CP0_TCStatus_rw_bitmask;
-    uint32_t newval;
-
-    newval = (env->active_tc.CP0_TCStatus & ~mask) | (arg1 & mask);
-
-    env->active_tc.CP0_TCStatus = newval;
-    sync_c0_tcstatus(env, env->current_tc, newval);
-}
-
-void helper_mttc0_tcstatus(CPUMIPSState *env, target_ulong arg1)
-{
-    int other_tc = env->CP0_VPEControl & (0xff << CP0VPECo_TargTC);
-    CPUMIPSState *other = mips_cpu_map_tc(env, &other_tc);
-
-    if (other_tc == other->current_tc) {
-        other->active_tc.CP0_TCStatus = arg1;
-    } else {
-        other->tcs[other_tc].CP0_TCStatus = arg1;
-    }
-    sync_c0_tcstatus(other, other_tc, arg1);
-}
-
-void helper_mtc0_tcbind(CPUMIPSState *env, target_ulong arg1)
-{
-    uint32_t mask = (1 << CP0TCBd_TBE);
-    uint32_t newval;
-
-    if (env->mvp->CP0_MVPControl & (1 << CP0MVPCo_VPC)) {
-        mask |= (1 << CP0TCBd_CurVPE);
-    }
-    newval = (env->active_tc.CP0_TCBind & ~mask) | (arg1 & mask);
-    env->active_tc.CP0_TCBind = newval;
-}
-
-void helper_mttc0_tcbind(CPUMIPSState *env, target_ulong arg1)
-{
-    int other_tc = env->CP0_VPEControl & (0xff << CP0VPECo_TargTC);
-    uint32_t mask = (1 << CP0TCBd_TBE);
-    uint32_t newval;
-    CPUMIPSState *other = mips_cpu_map_tc(env, &other_tc);
-
-    if (other->mvp->CP0_MVPControl & (1 << CP0MVPCo_VPC)) {
-        mask |= (1 << CP0TCBd_CurVPE);
-    }
-    if (other_tc == other->current_tc) {
-        newval = (other->active_tc.CP0_TCBind & ~mask) | (arg1 & mask);
-        other->active_tc.CP0_TCBind = newval;
-    } else {
-        newval = (other->tcs[other_tc].CP0_TCBind & ~mask) | (arg1 & mask);
-        other->tcs[other_tc].CP0_TCBind = newval;
-    }
-}
-
-void helper_mtc0_tcrestart(CPUMIPSState *env, target_ulong arg1)
-{
-    env->active_tc.PC = arg1;
-    env->active_tc.CP0_TCStatus &= ~(1 << CP0TCSt_TDS);
-    env->CP0_LLAddr = 0;
-    env->lladdr = 0;
-    /* MIPS16 not implemented. */
-}
-
-void helper_mttc0_tcrestart(CPUMIPSState *env, target_ulong arg1)
-{
-    int other_tc = env->CP0_VPEControl & (0xff << CP0VPECo_TargTC);
-    CPUMIPSState *other = mips_cpu_map_tc(env, &other_tc);
-
-    if (other_tc == other->current_tc) {
-        other->active_tc.PC = arg1;
-        other->active_tc.CP0_TCStatus &= ~(1 << CP0TCSt_TDS);
-        other->CP0_LLAddr = 0;
-        other->lladdr = 0;
-        /* MIPS16 not implemented. */
-    } else {
-        other->tcs[other_tc].PC = arg1;
-        other->tcs[other_tc].CP0_TCStatus &= ~(1 << CP0TCSt_TDS);
-        other->CP0_LLAddr = 0;
-        other->lladdr = 0;
-        /* MIPS16 not implemented. */
-    }
-}
-
-void helper_mtc0_tchalt(CPUMIPSState *env, target_ulong arg1)
-{
-    MIPSCPU *cpu = env_archcpu(env);
-
-    env->active_tc.CP0_TCHalt = arg1 & 0x1;
-
-    /* TODO: Halt TC / Restart (if allocated+active) TC. */
-    if (env->active_tc.CP0_TCHalt & 1) {
-        mips_tc_sleep(cpu, env->current_tc);
-    } else {
-        mips_tc_wake(cpu, env->current_tc);
-    }
-}
-
-void helper_mttc0_tchalt(CPUMIPSState *env, target_ulong arg1)
-{
-    int other_tc = env->CP0_VPEControl & (0xff << CP0VPECo_TargTC);
-    CPUMIPSState *other = mips_cpu_map_tc(env, &other_tc);
-    MIPSCPU *other_cpu = env_archcpu(other);
-
-    /* TODO: Halt TC / Restart (if allocated+active) TC. */
-
-    if (other_tc == other->current_tc) {
-        other->active_tc.CP0_TCHalt = arg1;
-    } else {
-        other->tcs[other_tc].CP0_TCHalt = arg1;
-    }
-
-    if (arg1 & 1) {
-        mips_tc_sleep(other_cpu, other_tc);
-    } else {
-        mips_tc_wake(other_cpu, other_tc);
-    }
-}
-
-void helper_mtc0_tccontext(CPUMIPSState *env, target_ulong arg1)
-{
-    env->active_tc.CP0_TCContext = arg1;
-}
-
-void helper_mttc0_tccontext(CPUMIPSState *env, target_ulong arg1)
-{
-    int other_tc = env->CP0_VPEControl & (0xff << CP0VPECo_TargTC);
-    CPUMIPSState *other = mips_cpu_map_tc(env, &other_tc);
-
-    if (other_tc == other->current_tc) {
-        other->active_tc.CP0_TCContext = arg1;
-    } else {
-        other->tcs[other_tc].CP0_TCContext = arg1;
-    }
-}
-
-void helper_mtc0_tcschedule(CPUMIPSState *env, target_ulong arg1)
-{
-    env->active_tc.CP0_TCSchedule = arg1;
-}
-
-void helper_mttc0_tcschedule(CPUMIPSState *env, target_ulong arg1)
-{
-    int other_tc = env->CP0_VPEControl & (0xff << CP0VPECo_TargTC);
-    CPUMIPSState *other = mips_cpu_map_tc(env, &other_tc);
-
-    if (other_tc == other->current_tc) {
-        other->active_tc.CP0_TCSchedule = arg1;
-    } else {
-        other->tcs[other_tc].CP0_TCSchedule = arg1;
-    }
-}
-
-void helper_mtc0_tcschefback(CPUMIPSState *env, target_ulong arg1)
-{
-    env->active_tc.CP0_TCScheFBack = arg1;
-}
-
-void helper_mttc0_tcschefback(CPUMIPSState *env, target_ulong arg1)
-{
-    int other_tc = env->CP0_VPEControl & (0xff << CP0VPECo_TargTC);
-    CPUMIPSState *other = mips_cpu_map_tc(env, &other_tc);
-
-    if (other_tc == other->current_tc) {
-        other->active_tc.CP0_TCScheFBack = arg1;
-    } else {
-        other->tcs[other_tc].CP0_TCScheFBack = arg1;
-    }
-}
-
-void helper_mtc0_entrylo1(CPUMIPSState *env, target_ulong arg1)
-{
-    /* 1k pages not implemented */
-    target_ulong rxi = arg1 & (env->CP0_PageGrain & (3u << CP0PG_XIE));
-    env->CP0_EntryLo1 = (arg1 & MTC0_ENTRYLO_MASK(env))
-                        | (rxi << (CP0EnLo_XI - 30));
-}
-
-#if defined(TARGET_MIPS64)
-void helper_dmtc0_entrylo1(CPUMIPSState *env, uint64_t arg1)
-{
-    uint64_t rxi = arg1 & ((env->CP0_PageGrain & (3ull << CP0PG_XIE)) << 32);
-    env->CP0_EntryLo1 = (arg1 & DMTC0_ENTRYLO_MASK(env)) | rxi;
-}
-#endif
-
-void helper_mtc0_context(CPUMIPSState *env, target_ulong arg1)
-{
-    env->CP0_Context = (env->CP0_Context & 0x007FFFFF) | (arg1 & ~0x007FFFFF);
-}
-
-void helper_mtc0_memorymapid(CPUMIPSState *env, target_ulong arg1)
-{
-    int32_t old;
-    old = env->CP0_MemoryMapID;
-    env->CP0_MemoryMapID = (int32_t) arg1;
-    /* If the MemoryMapID changes, flush qemu's TLB.  */
-    if (old != env->CP0_MemoryMapID) {
-        cpu_mips_tlb_flush(env);
-    }
-}
-
-void update_pagemask(CPUMIPSState *env, target_ulong arg1, int32_t *pagemask)
-{
-    uint64_t mask = arg1 >> (TARGET_PAGE_BITS + 1);
-    if (!(env->insn_flags & ISA_MIPS32R6) || (arg1 == ~0) ||
-        (mask == 0x0000 || mask == 0x0003 || mask == 0x000F ||
-         mask == 0x003F || mask == 0x00FF || mask == 0x03FF ||
-         mask == 0x0FFF || mask == 0x3FFF || mask == 0xFFFF)) {
-        env->CP0_PageMask = arg1 & (0x1FFFFFFF & (TARGET_PAGE_MASK << 1));
-    }
-}
-
-void helper_mtc0_pagemask(CPUMIPSState *env, target_ulong arg1)
-{
-    update_pagemask(env, arg1, &env->CP0_PageMask);
-}
-
-void helper_mtc0_pagegrain(CPUMIPSState *env, target_ulong arg1)
-{
-    /* SmartMIPS not implemented */
-    /* 1k pages not implemented */
-    env->CP0_PageGrain = (arg1 & env->CP0_PageGrain_rw_bitmask) |
-                         (env->CP0_PageGrain & ~env->CP0_PageGrain_rw_bitmask);
-    compute_hflags(env);
-    restore_pamask(env);
-}
-
-void helper_mtc0_segctl0(CPUMIPSState *env, target_ulong arg1)
-{
-    CPUState *cs = env_cpu(env);
-
-    env->CP0_SegCtl0 = arg1 & CP0SC0_MASK;
-    tlb_flush(cs);
-}
-
-void helper_mtc0_segctl1(CPUMIPSState *env, target_ulong arg1)
-{
-    CPUState *cs = env_cpu(env);
-
-    env->CP0_SegCtl1 = arg1 & CP0SC1_MASK;
-    tlb_flush(cs);
-}
-
-void helper_mtc0_segctl2(CPUMIPSState *env, target_ulong arg1)
-{
-    CPUState *cs = env_cpu(env);
-
-    env->CP0_SegCtl2 = arg1 & CP0SC2_MASK;
-    tlb_flush(cs);
-}
-
-void helper_mtc0_pwfield(CPUMIPSState *env, target_ulong arg1)
-{
-#if defined(TARGET_MIPS64)
-    uint64_t mask = 0x3F3FFFFFFFULL;
-    uint32_t old_ptei = (env->CP0_PWField >> CP0PF_PTEI) & 0x3FULL;
-    uint32_t new_ptei = (arg1 >> CP0PF_PTEI) & 0x3FULL;
-
-    if ((env->insn_flags & ISA_MIPS32R6)) {
-        if (((arg1 >> CP0PF_BDI) & 0x3FULL) < 12) {
-            mask &= ~(0x3FULL << CP0PF_BDI);
-        }
-        if (((arg1 >> CP0PF_GDI) & 0x3FULL) < 12) {
-            mask &= ~(0x3FULL << CP0PF_GDI);
-        }
-        if (((arg1 >> CP0PF_UDI) & 0x3FULL) < 12) {
-            mask &= ~(0x3FULL << CP0PF_UDI);
-        }
-        if (((arg1 >> CP0PF_MDI) & 0x3FULL) < 12) {
-            mask &= ~(0x3FULL << CP0PF_MDI);
-        }
-        if (((arg1 >> CP0PF_PTI) & 0x3FULL) < 12) {
-            mask &= ~(0x3FULL << CP0PF_PTI);
-        }
-    }
-    env->CP0_PWField = arg1 & mask;
-
-    if ((new_ptei >= 32) ||
-            ((env->insn_flags & ISA_MIPS32R6) &&
-                    (new_ptei == 0 || new_ptei == 1))) {
-        env->CP0_PWField = (env->CP0_PWField & ~0x3FULL) |
-                (old_ptei << CP0PF_PTEI);
-    }
-#else
-    uint32_t mask = 0x3FFFFFFF;
-    uint32_t old_ptew = (env->CP0_PWField >> CP0PF_PTEW) & 0x3F;
-    uint32_t new_ptew = (arg1 >> CP0PF_PTEW) & 0x3F;
-
-    if ((env->insn_flags & ISA_MIPS32R6)) {
-        if (((arg1 >> CP0PF_GDW) & 0x3F) < 12) {
-            mask &= ~(0x3F << CP0PF_GDW);
-        }
-        if (((arg1 >> CP0PF_UDW) & 0x3F) < 12) {
-            mask &= ~(0x3F << CP0PF_UDW);
-        }
-        if (((arg1 >> CP0PF_MDW) & 0x3F) < 12) {
-            mask &= ~(0x3F << CP0PF_MDW);
-        }
-        if (((arg1 >> CP0PF_PTW) & 0x3F) < 12) {
-            mask &= ~(0x3F << CP0PF_PTW);
-        }
-    }
-    env->CP0_PWField = arg1 & mask;
-
-    if ((new_ptew >= 32) ||
-            ((env->insn_flags & ISA_MIPS32R6) &&
-                    (new_ptew == 0 || new_ptew == 1))) {
-        env->CP0_PWField = (env->CP0_PWField & ~0x3F) |
-                (old_ptew << CP0PF_PTEW);
-    }
-#endif
-}
-
-void helper_mtc0_pwsize(CPUMIPSState *env, target_ulong arg1)
-{
-#if defined(TARGET_MIPS64)
-    env->CP0_PWSize = arg1 & 0x3F7FFFFFFFULL;
-#else
-    env->CP0_PWSize = arg1 & 0x3FFFFFFF;
-#endif
-}
-
-void helper_mtc0_wired(CPUMIPSState *env, target_ulong arg1)
-{
-    if (env->insn_flags & ISA_MIPS32R6) {
-        if (arg1 < env->tlb->nb_tlb) {
-            env->CP0_Wired = arg1;
-        }
-    } else {
-        env->CP0_Wired = arg1 % env->tlb->nb_tlb;
-    }
-}
-
-void helper_mtc0_pwctl(CPUMIPSState *env, target_ulong arg1)
-{
-#if defined(TARGET_MIPS64)
-    /* PWEn = 0. Hardware page table walking is not implemented. */
-    env->CP0_PWCtl = (env->CP0_PWCtl & 0x000000C0) | (arg1 & 0x5C00003F);
-#else
-    env->CP0_PWCtl = (arg1 & 0x800000FF);
-#endif
-}
-
-void helper_mtc0_srsconf0(CPUMIPSState *env, target_ulong arg1)
-{
-    env->CP0_SRSConf0 |= arg1 & env->CP0_SRSConf0_rw_bitmask;
-}
-
-void helper_mtc0_srsconf1(CPUMIPSState *env, target_ulong arg1)
-{
-    env->CP0_SRSConf1 |= arg1 & env->CP0_SRSConf1_rw_bitmask;
-}
-
-void helper_mtc0_srsconf2(CPUMIPSState *env, target_ulong arg1)
-{
-    env->CP0_SRSConf2 |= arg1 & env->CP0_SRSConf2_rw_bitmask;
-}
-
-void helper_mtc0_srsconf3(CPUMIPSState *env, target_ulong arg1)
-{
-    env->CP0_SRSConf3 |= arg1 & env->CP0_SRSConf3_rw_bitmask;
-}
-
-void helper_mtc0_srsconf4(CPUMIPSState *env, target_ulong arg1)
-{
-    env->CP0_SRSConf4 |= arg1 & env->CP0_SRSConf4_rw_bitmask;
-}
-
-void helper_mtc0_hwrena(CPUMIPSState *env, target_ulong arg1)
-{
-    uint32_t mask = 0x0000000F;
-
-    if ((env->CP0_Config1 & (1 << CP0C1_PC)) &&
-        (env->insn_flags & ISA_MIPS32R6)) {
-        mask |= (1 << 4);
-    }
-    if (env->insn_flags & ISA_MIPS32R6) {
-        mask |= (1 << 5);
-    }
-    if (env->CP0_Config3 & (1 << CP0C3_ULRI)) {
-        mask |= (1 << 29);
-
-        if (arg1 & (1 << 29)) {
-            env->hflags |= MIPS_HFLAG_HWRENA_ULR;
-        } else {
-            env->hflags &= ~MIPS_HFLAG_HWRENA_ULR;
-        }
-    }
-
-    env->CP0_HWREna = arg1 & mask;
-}
-
-void helper_mtc0_count(CPUMIPSState *env, target_ulong arg1)
-{
-    cpu_mips_store_count(env, arg1);
-}
-
-void helper_mtc0_saari(CPUMIPSState *env, target_ulong arg1)
-{
-    uint32_t target = arg1 & 0x3f;
-    if (target <= 1) {
-        env->CP0_SAARI = target;
-    }
-}
-
-void helper_mtc0_saar(CPUMIPSState *env, target_ulong arg1)
-{
-    uint32_t target = env->CP0_SAARI & 0x3f;
-    if (target < 2) {
-        env->CP0_SAAR[target] = arg1 & 0x00000ffffffff03fULL;
-        switch (target) {
-        case 0:
-            if (env->itu) {
-                itc_reconfigure(env->itu);
-            }
-            break;
-        }
-    }
-}
-
-void helper_mthc0_saar(CPUMIPSState *env, target_ulong arg1)
-{
-    uint32_t target = env->CP0_SAARI & 0x3f;
-    if (target < 2) {
-        env->CP0_SAAR[target] =
-            (((uint64_t) arg1 << 32) & 0x00000fff00000000ULL) |
-            (env->CP0_SAAR[target] & 0x00000000ffffffffULL);
-        switch (target) {
-        case 0:
-            if (env->itu) {
-                itc_reconfigure(env->itu);
-            }
-            break;
-        }
-    }
-}
-
-void helper_mtc0_entryhi(CPUMIPSState *env, target_ulong arg1)
-{
-    target_ulong old, val, mask;
-    mask = (TARGET_PAGE_MASK << 1) | env->CP0_EntryHi_ASID_mask;
-    if (((env->CP0_Config4 >> CP0C4_IE) & 0x3) >= 2) {
-        mask |= 1 << CP0EnHi_EHINV;
-    }
-
-    /* 1k pages not implemented */
-#if defined(TARGET_MIPS64)
-    if (env->insn_flags & ISA_MIPS32R6) {
-        int entryhi_r = extract64(arg1, 62, 2);
-        int config0_at = extract32(env->CP0_Config0, 13, 2);
-        bool no_supervisor = (env->CP0_Status_rw_bitmask & 0x8) == 0;
-        if ((entryhi_r == 2) ||
-            (entryhi_r == 1 && (no_supervisor || config0_at == 1))) {
-            /* skip EntryHi.R field if new value is reserved */
-            mask &= ~(0x3ull << 62);
-        }
-    }
-    mask &= env->SEGMask;
-#endif
-    old = env->CP0_EntryHi;
-    val = (arg1 & mask) | (old & ~mask);
-    env->CP0_EntryHi = val;
-    if (env->CP0_Config3 & (1 << CP0C3_MT)) {
-        sync_c0_entryhi(env, env->current_tc);
-    }
-    /* If the ASID changes, flush qemu's TLB.  */
-    if ((old & env->CP0_EntryHi_ASID_mask) !=
-        (val & env->CP0_EntryHi_ASID_mask)) {
-        tlb_flush(env_cpu(env));
-    }
-}
-
-void helper_mttc0_entryhi(CPUMIPSState *env, target_ulong arg1)
-{
-    int other_tc = env->CP0_VPEControl & (0xff << CP0VPECo_TargTC);
-    CPUMIPSState *other = mips_cpu_map_tc(env, &other_tc);
-
-    other->CP0_EntryHi = arg1;
-    sync_c0_entryhi(other, other_tc);
-}
-
-void helper_mtc0_compare(CPUMIPSState *env, target_ulong arg1)
-{
-    cpu_mips_store_compare(env, arg1);
-}
-
-void helper_mtc0_status(CPUMIPSState *env, target_ulong arg1)
-{
-    uint32_t val, old;
-
-    old = env->CP0_Status;
-    cpu_mips_store_status(env, arg1);
-    val = env->CP0_Status;
-
-    if (qemu_loglevel_mask(CPU_LOG_EXEC)) {
-        qemu_log("Status %08x (%08x) => %08x (%08x) Cause %08x",
-                old, old & env->CP0_Cause & CP0Ca_IP_mask,
-                val, val & env->CP0_Cause & CP0Ca_IP_mask,
-                env->CP0_Cause);
-        switch (cpu_mmu_index(env, false)) {
-        case 3:
-            qemu_log(", ERL\n");
-            break;
-        case MIPS_HFLAG_UM:
-            qemu_log(", UM\n");
-            break;
-        case MIPS_HFLAG_SM:
-            qemu_log(", SM\n");
-            break;
-        case MIPS_HFLAG_KM:
-            qemu_log("\n");
-            break;
-        default:
-            cpu_abort(env_cpu(env), "Invalid MMU mode!\n");
-            break;
-        }
-    }
-}
-
-void helper_mttc0_status(CPUMIPSState *env, target_ulong arg1)
-{
-    int other_tc = env->CP0_VPEControl & (0xff << CP0VPECo_TargTC);
-    uint32_t mask = env->CP0_Status_rw_bitmask & ~0xf1000018;
-    CPUMIPSState *other = mips_cpu_map_tc(env, &other_tc);
-
-    other->CP0_Status = (other->CP0_Status & ~mask) | (arg1 & mask);
-    sync_c0_status(env, other, other_tc);
-}
-
-void helper_mtc0_intctl(CPUMIPSState *env, target_ulong arg1)
-{
-    env->CP0_IntCtl = (env->CP0_IntCtl & ~0x000003e0) | (arg1 & 0x000003e0);
-}
-
-void helper_mtc0_srsctl(CPUMIPSState *env, target_ulong arg1)
-{
-    uint32_t mask = (0xf << CP0SRSCtl_ESS) | (0xf << CP0SRSCtl_PSS);
-    env->CP0_SRSCtl = (env->CP0_SRSCtl & ~mask) | (arg1 & mask);
-}
-
-void helper_mtc0_cause(CPUMIPSState *env, target_ulong arg1)
-{
-    cpu_mips_store_cause(env, arg1);
-}
-
-void helper_mttc0_cause(CPUMIPSState *env, target_ulong arg1)
-{
-    int other_tc = env->CP0_VPEControl & (0xff << CP0VPECo_TargTC);
-    CPUMIPSState *other = mips_cpu_map_tc(env, &other_tc);
-
-    cpu_mips_store_cause(other, arg1);
-}
-
-target_ulong helper_mftc0_epc(CPUMIPSState *env)
-{
-    int other_tc = env->CP0_VPEControl & (0xff << CP0VPECo_TargTC);
-    CPUMIPSState *other = mips_cpu_map_tc(env, &other_tc);
-
-    return other->CP0_EPC;
-}
-
-target_ulong helper_mftc0_ebase(CPUMIPSState *env)
-{
-    int other_tc = env->CP0_VPEControl & (0xff << CP0VPECo_TargTC);
-    CPUMIPSState *other = mips_cpu_map_tc(env, &other_tc);
-
-    return other->CP0_EBase;
-}
-
-void helper_mtc0_ebase(CPUMIPSState *env, target_ulong arg1)
-{
-    target_ulong mask = 0x3FFFF000 | env->CP0_EBaseWG_rw_bitmask;
-    if (arg1 & env->CP0_EBaseWG_rw_bitmask) {
-        mask |= ~0x3FFFFFFF;
-    }
-    env->CP0_EBase = (env->CP0_EBase & ~mask) | (arg1 & mask);
-}
-
-void helper_mttc0_ebase(CPUMIPSState *env, target_ulong arg1)
-{
-    int other_tc = env->CP0_VPEControl & (0xff << CP0VPECo_TargTC);
-    CPUMIPSState *other = mips_cpu_map_tc(env, &other_tc);
-    target_ulong mask = 0x3FFFF000 | env->CP0_EBaseWG_rw_bitmask;
-    if (arg1 & env->CP0_EBaseWG_rw_bitmask) {
-        mask |= ~0x3FFFFFFF;
-    }
-    other->CP0_EBase = (other->CP0_EBase & ~mask) | (arg1 & mask);
-}
-
-target_ulong helper_mftc0_configx(CPUMIPSState *env, target_ulong idx)
-{
-    int other_tc = env->CP0_VPEControl & (0xff << CP0VPECo_TargTC);
-    CPUMIPSState *other = mips_cpu_map_tc(env, &other_tc);
-
-    switch (idx) {
-    case 0: return other->CP0_Config0;
-    case 1: return other->CP0_Config1;
-    case 2: return other->CP0_Config2;
-    case 3: return other->CP0_Config3;
-    /* 4 and 5 are reserved.  */
-    case 6: return other->CP0_Config6;
-    case 7: return other->CP0_Config7;
-    default:
-        break;
-    }
-    return 0;
-}
-
-void helper_mtc0_config0(CPUMIPSState *env, target_ulong arg1)
-{
-    env->CP0_Config0 = (env->CP0_Config0 & 0x81FFFFF8) | (arg1 & 0x00000007);
-}
-
-void helper_mtc0_config2(CPUMIPSState *env, target_ulong arg1)
-{
-    /* tertiary/secondary caches not implemented */
-    env->CP0_Config2 = (env->CP0_Config2 & 0x8FFF0FFF);
-}
-
-void helper_mtc0_config3(CPUMIPSState *env, target_ulong arg1)
-{
-    if (env->insn_flags & ASE_MICROMIPS) {
-        env->CP0_Config3 = (env->CP0_Config3 & ~(1 << CP0C3_ISA_ON_EXC)) |
-                           (arg1 & (1 << CP0C3_ISA_ON_EXC));
-    }
-}
-
-void helper_mtc0_config4(CPUMIPSState *env, target_ulong arg1)
-{
-    env->CP0_Config4 = (env->CP0_Config4 & (~env->CP0_Config4_rw_bitmask)) |
-                       (arg1 & env->CP0_Config4_rw_bitmask);
-}
-
-void helper_mtc0_config5(CPUMIPSState *env, target_ulong arg1)
-{
-    env->CP0_Config5 = (env->CP0_Config5 & (~env->CP0_Config5_rw_bitmask)) |
-                       (arg1 & env->CP0_Config5_rw_bitmask);
-    env->CP0_EntryHi_ASID_mask = (env->CP0_Config5 & (1 << CP0C5_MI)) ?
-            0x0 : (env->CP0_Config4 & (1 << CP0C4_AE)) ? 0x3ff : 0xff;
-    compute_hflags(env);
-}
-
-void helper_mtc0_lladdr(CPUMIPSState *env, target_ulong arg1)
-{
-    target_long mask = env->CP0_LLAddr_rw_bitmask;
-    arg1 = arg1 << env->CP0_LLAddr_shift;
-    env->CP0_LLAddr = (env->CP0_LLAddr & ~mask) | (arg1 & mask);
-}
-
-#define MTC0_MAAR_MASK(env) \
-        ((0x1ULL << 63) | ((env->PAMask >> 4) & ~0xFFFull) | 0x3)
-
-void helper_mtc0_maar(CPUMIPSState *env, target_ulong arg1)
-{
-    env->CP0_MAAR[env->CP0_MAARI] = arg1 & MTC0_MAAR_MASK(env);
-}
-
-void helper_mthc0_maar(CPUMIPSState *env, target_ulong arg1)
-{
-    env->CP0_MAAR[env->CP0_MAARI] =
-        (((uint64_t) arg1 << 32) & MTC0_MAAR_MASK(env)) |
-        (env->CP0_MAAR[env->CP0_MAARI] & 0x00000000ffffffffULL);
-}
-
-void helper_mtc0_maari(CPUMIPSState *env, target_ulong arg1)
-{
-    int index = arg1 & 0x3f;
-    if (index == 0x3f) {
-        /*
-         * Software may write all ones to INDEX to determine the
-         *  maximum value supported.
-         */
-        env->CP0_MAARI = MIPS_MAAR_MAX - 1;
-    } else if (index < MIPS_MAAR_MAX) {
-        env->CP0_MAARI = index;
-    }
-    /*
-     * Other than the all ones, if the value written is not supported,
-     * then INDEX is unchanged from its previous value.
-     */
-}
-
-void helper_mtc0_watchlo(CPUMIPSState *env, target_ulong arg1, uint32_t sel)
-{
-    /*
-     * Watch exceptions for instructions, data loads, data stores
-     * not implemented.
-     */
-    env->CP0_WatchLo[sel] = (arg1 & ~0x7);
-}
-
-void helper_mtc0_watchhi(CPUMIPSState *env, target_ulong arg1, uint32_t sel)
-{
-    uint64_t mask = 0x40000FF8 | (env->CP0_EntryHi_ASID_mask << CP0WH_ASID);
-    if ((env->CP0_Config5 >> CP0C5_MI) & 1) {
-        mask |= 0xFFFFFFFF00000000ULL; /* MMID */
-    }
-    env->CP0_WatchHi[sel] = arg1 & mask;
-    env->CP0_WatchHi[sel] &= ~(env->CP0_WatchHi[sel] & arg1 & 0x7);
-}
-
-void helper_mthc0_watchhi(CPUMIPSState *env, target_ulong arg1, uint32_t sel)
-{
-    env->CP0_WatchHi[sel] = ((uint64_t) (arg1) << 32) |
-                            (env->CP0_WatchHi[sel] & 0x00000000ffffffffULL);
-}
-
-void helper_mtc0_xcontext(CPUMIPSState *env, target_ulong arg1)
-{
-    target_ulong mask = (1ULL << (env->SEGBITS - 7)) - 1;
-    env->CP0_XContext = (env->CP0_XContext & mask) | (arg1 & ~mask);
-}
-
-void helper_mtc0_framemask(CPUMIPSState *env, target_ulong arg1)
-{
-    env->CP0_Framemask = arg1; /* XXX */
-}
-
-void helper_mtc0_debug(CPUMIPSState *env, target_ulong arg1)
-{
-    env->CP0_Debug = (env->CP0_Debug & 0x8C03FC1F) | (arg1 & 0x13300120);
-    if (arg1 & (1 << CP0DB_DM)) {
-        env->hflags |= MIPS_HFLAG_DM;
-    } else {
-        env->hflags &= ~MIPS_HFLAG_DM;
-    }
-}
-
-void helper_mttc0_debug(CPUMIPSState *env, target_ulong arg1)
-{
-    int other_tc = env->CP0_VPEControl & (0xff << CP0VPECo_TargTC);
-    uint32_t val = arg1 & ((1 << CP0DB_SSt) | (1 << CP0DB_Halt));
-    CPUMIPSState *other = mips_cpu_map_tc(env, &other_tc);
-
-    /* XXX: Might be wrong, check with EJTAG spec. */
-    if (other_tc == other->current_tc) {
-        other->active_tc.CP0_Debug_tcstatus = val;
-    } else {
-        other->tcs[other_tc].CP0_Debug_tcstatus = val;
-    }
-    other->CP0_Debug = (other->CP0_Debug &
-                     ((1 << CP0DB_SSt) | (1 << CP0DB_Halt))) |
-                     (arg1 & ~((1 << CP0DB_SSt) | (1 << CP0DB_Halt)));
-}
-
-void helper_mtc0_performance0(CPUMIPSState *env, target_ulong arg1)
-{
-    env->CP0_Performance0 = arg1 & 0x000007ff;
-}
-
-void helper_mtc0_errctl(CPUMIPSState *env, target_ulong arg1)
-{
-    int32_t wst = arg1 & (1 << CP0EC_WST);
-    int32_t spr = arg1 & (1 << CP0EC_SPR);
-    int32_t itc = env->itc_tag ? (arg1 & (1 << CP0EC_ITC)) : 0;
-
-    env->CP0_ErrCtl = wst | spr | itc;
-
-    if (itc && !wst && !spr) {
-        env->hflags |= MIPS_HFLAG_ITC_CACHE;
-    } else {
-        env->hflags &= ~MIPS_HFLAG_ITC_CACHE;
-    }
-}
-
-void helper_mtc0_taglo(CPUMIPSState *env, target_ulong arg1)
-{
-    if (env->hflags & MIPS_HFLAG_ITC_CACHE) {
-        /*
-         * If CACHE instruction is configured for ITC tags then make all
-         * CP0.TagLo bits writable. The actual write to ITC Configuration
-         * Tag will take care of the read-only bits.
-         */
-        env->CP0_TagLo = arg1;
-    } else {
-        env->CP0_TagLo = arg1 & 0xFFFFFCF6;
-    }
-}
-
-void helper_mtc0_datalo(CPUMIPSState *env, target_ulong arg1)
-{
-    env->CP0_DataLo = arg1; /* XXX */
-}
-
-void helper_mtc0_taghi(CPUMIPSState *env, target_ulong arg1)
-{
-    env->CP0_TagHi = arg1; /* XXX */
-}
-
-void helper_mtc0_datahi(CPUMIPSState *env, target_ulong arg1)
-{
-    env->CP0_DataHi = arg1; /* XXX */
-}
-
-/* MIPS MT functions */
-target_ulong helper_mftgpr(CPUMIPSState *env, uint32_t sel)
-{
-    int other_tc = env->CP0_VPEControl & (0xff << CP0VPECo_TargTC);
-    CPUMIPSState *other = mips_cpu_map_tc(env, &other_tc);
-
-    if (other_tc == other->current_tc) {
-        return other->active_tc.gpr[sel];
-    } else {
-        return other->tcs[other_tc].gpr[sel];
-    }
-}
-
-target_ulong helper_mftlo(CPUMIPSState *env, uint32_t sel)
-{
-    int other_tc = env->CP0_VPEControl & (0xff << CP0VPECo_TargTC);
-    CPUMIPSState *other = mips_cpu_map_tc(env, &other_tc);
-
-    if (other_tc == other->current_tc) {
-        return other->active_tc.LO[sel];
-    } else {
-        return other->tcs[other_tc].LO[sel];
-    }
-}
-
-target_ulong helper_mfthi(CPUMIPSState *env, uint32_t sel)
-{
-    int other_tc = env->CP0_VPEControl & (0xff << CP0VPECo_TargTC);
-    CPUMIPSState *other = mips_cpu_map_tc(env, &other_tc);
-
-    if (other_tc == other->current_tc) {
-        return other->active_tc.HI[sel];
-    } else {
-        return other->tcs[other_tc].HI[sel];
-    }
-}
-
-target_ulong helper_mftacx(CPUMIPSState *env, uint32_t sel)
-{
-    int other_tc = env->CP0_VPEControl & (0xff << CP0VPECo_TargTC);
-    CPUMIPSState *other = mips_cpu_map_tc(env, &other_tc);
-
-    if (other_tc == other->current_tc) {
-        return other->active_tc.ACX[sel];
-    } else {
-        return other->tcs[other_tc].ACX[sel];
-    }
-}
-
-target_ulong helper_mftdsp(CPUMIPSState *env)
-{
-    int other_tc = env->CP0_VPEControl & (0xff << CP0VPECo_TargTC);
-    CPUMIPSState *other = mips_cpu_map_tc(env, &other_tc);
-
-    if (other_tc == other->current_tc) {
-        return other->active_tc.DSPControl;
-    } else {
-        return other->tcs[other_tc].DSPControl;
-    }
-}
-
-void helper_mttgpr(CPUMIPSState *env, target_ulong arg1, uint32_t sel)
-{
-    int other_tc = env->CP0_VPEControl & (0xff << CP0VPECo_TargTC);
-    CPUMIPSState *other = mips_cpu_map_tc(env, &other_tc);
-
-    if (other_tc == other->current_tc) {
-        other->active_tc.gpr[sel] = arg1;
-    } else {
-        other->tcs[other_tc].gpr[sel] = arg1;
-    }
-}
-
-void helper_mttlo(CPUMIPSState *env, target_ulong arg1, uint32_t sel)
-{
-    int other_tc = env->CP0_VPEControl & (0xff << CP0VPECo_TargTC);
-    CPUMIPSState *other = mips_cpu_map_tc(env, &other_tc);
-
-    if (other_tc == other->current_tc) {
-        other->active_tc.LO[sel] = arg1;
-    } else {
-        other->tcs[other_tc].LO[sel] = arg1;
-    }
-}
-
-void helper_mtthi(CPUMIPSState *env, target_ulong arg1, uint32_t sel)
-{
-    int other_tc = env->CP0_VPEControl & (0xff << CP0VPECo_TargTC);
-    CPUMIPSState *other = mips_cpu_map_tc(env, &other_tc);
-
-    if (other_tc == other->current_tc) {
-        other->active_tc.HI[sel] = arg1;
-    } else {
-        other->tcs[other_tc].HI[sel] = arg1;
-    }
-}
-
-void helper_mttacx(CPUMIPSState *env, target_ulong arg1, uint32_t sel)
-{
-    int other_tc = env->CP0_VPEControl & (0xff << CP0VPECo_TargTC);
-    CPUMIPSState *other = mips_cpu_map_tc(env, &other_tc);
-
-    if (other_tc == other->current_tc) {
-        other->active_tc.ACX[sel] = arg1;
-    } else {
-        other->tcs[other_tc].ACX[sel] = arg1;
-    }
-}
-
-void helper_mttdsp(CPUMIPSState *env, target_ulong arg1)
-{
-    int other_tc = env->CP0_VPEControl & (0xff << CP0VPECo_TargTC);
-    CPUMIPSState *other = mips_cpu_map_tc(env, &other_tc);
-
-    if (other_tc == other->current_tc) {
-        other->active_tc.DSPControl = arg1;
-    } else {
-        other->tcs[other_tc].DSPControl = arg1;
-    }
-}
-
-/* MIPS MT functions */
-target_ulong helper_dmt(void)
-{
-    /* TODO */
-    return 0;
-}
-
-target_ulong helper_emt(void)
-{
-    /* TODO */
-    return 0;
-}
-
-target_ulong helper_dvpe(CPUMIPSState *env)
-{
-    CPUState *other_cs = first_cpu;
-    target_ulong prev = env->mvp->CP0_MVPControl;
-
-    CPU_FOREACH(other_cs) {
-        MIPSCPU *other_cpu = MIPS_CPU(other_cs);
-        /* Turn off all VPEs except the one executing the dvpe.  */
-        if (&other_cpu->env != env) {
-            other_cpu->env.mvp->CP0_MVPControl &= ~(1 << CP0MVPCo_EVP);
-            mips_vpe_sleep(other_cpu);
-        }
-    }
-    return prev;
-}
-
-target_ulong helper_evpe(CPUMIPSState *env)
-{
-    CPUState *other_cs = first_cpu;
-    target_ulong prev = env->mvp->CP0_MVPControl;
-
-    CPU_FOREACH(other_cs) {
-        MIPSCPU *other_cpu = MIPS_CPU(other_cs);
-
-        if (&other_cpu->env != env
-            /* If the VPE is WFI, don't disturb its sleep.  */
-            && !mips_vpe_is_wfi(other_cpu)) {
-            /* Enable the VPE.  */
-            other_cpu->env.mvp->CP0_MVPControl |= (1 << CP0MVPCo_EVP);
-            mips_vpe_wake(other_cpu); /* And wake it up.  */
-        }
-    }
-    return prev;
-}
-#endif /* !CONFIG_USER_ONLY */
-
-void helper_fork(target_ulong arg1, target_ulong arg2)
-{
-    /*
-     * arg1 = rt, arg2 = rs
-     * TODO: store to TC register
-     */
-}
-
-target_ulong helper_yield(CPUMIPSState *env, target_ulong arg)
-{
-    target_long arg1 = arg;
-
-    if (arg1 < 0) {
-        /* No scheduling policy implemented. */
-        if (arg1 != -2) {
-            if (env->CP0_VPEControl & (1 << CP0VPECo_YSI) &&
-                env->active_tc.CP0_TCStatus & (1 << CP0TCSt_DT)) {
-                env->CP0_VPEControl &= ~(0x7 << CP0VPECo_EXCPT);
-                env->CP0_VPEControl |= 4 << CP0VPECo_EXCPT;
-                do_raise_exception(env, EXCP_THREAD, GETPC());
-            }
-        }
-    } else if (arg1 == 0) {
-        if (0) {
-            /* TODO: TC underflow */
-            env->CP0_VPEControl &= ~(0x7 << CP0VPECo_EXCPT);
-            do_raise_exception(env, EXCP_THREAD, GETPC());
-        } else {
-            /* TODO: Deallocate TC */
-        }
-    } else if (arg1 > 0) {
-        /* Yield qualifier inputs not implemented. */
-        env->CP0_VPEControl &= ~(0x7 << CP0VPECo_EXCPT);
-        env->CP0_VPEControl |= 2 << CP0VPECo_EXCPT;
-        do_raise_exception(env, EXCP_THREAD, GETPC());
-    }
-    return env->CP0_YQMask;
-}
-
-/* R6 Multi-threading */
-#ifndef CONFIG_USER_ONLY
-target_ulong helper_dvp(CPUMIPSState *env)
-{
-    CPUState *other_cs = first_cpu;
-    target_ulong prev = env->CP0_VPControl;
-
-    if (!((env->CP0_VPControl >> CP0VPCtl_DIS) & 1)) {
-        CPU_FOREACH(other_cs) {
-            MIPSCPU *other_cpu = MIPS_CPU(other_cs);
-            /* Turn off all VPs except the one executing the dvp. */
-            if (&other_cpu->env != env) {
-                mips_vpe_sleep(other_cpu);
-            }
-        }
-        env->CP0_VPControl |= (1 << CP0VPCtl_DIS);
-    }
-    return prev;
-}
-
-target_ulong helper_evp(CPUMIPSState *env)
-{
-    CPUState *other_cs = first_cpu;
-    target_ulong prev = env->CP0_VPControl;
-
-    if ((env->CP0_VPControl >> CP0VPCtl_DIS) & 1) {
-        CPU_FOREACH(other_cs) {
-            MIPSCPU *other_cpu = MIPS_CPU(other_cs);
-            if ((&other_cpu->env != env) && !mips_vp_is_wfi(other_cpu)) {
-                /*
-                 * If the VP is WFI, don't disturb its sleep.
-                 * Otherwise, wake it up.
-                 */
-                mips_vpe_wake(other_cpu);
-            }
-        }
-        env->CP0_VPControl &= ~(1 << CP0VPCtl_DIS);
-    }
-    return prev;
-}
-#endif /* !CONFIG_USER_ONLY */
 
 #ifndef CONFIG_USER_ONLY
 /* TLB management */
