[Qemu-devel] [6112] A first attempt on supporting snapshots for the MIPS target.

[Thiemo Seufer]

Revision: 6112
          http://svn.sv.gnu.org/viewvc/?view=rev&root=qemu&revision=6112
Author:   ths
Date:     2008-12-20 19:44:31 +0000 (Sat, 20 Dec 2008)

Log Message:
-----------
A first attempt on supporting snapshots for the MIPS target.

Signed-off-by: Thiemo Seufer <address@hidden>

Modified Paths:
--------------
    trunk/target-mips/machine.c

Modified: trunk/target-mips/machine.c
===================================================================
--- trunk/target-mips/machine.c 2008-12-20 19:42:14 UTC (rev 6111)
+++ trunk/target-mips/machine.c 2008-12-20 19:44:31 UTC (rev 6112)
@@ -1,6 +1,8 @@
 #include "hw/hw.h"
 #include "hw/boards.h"
 
+#include "exec-all.h"
+
 void register_machines(void)
 {
     qemu_register_machine(&mips_malta_machine);
@@ -10,11 +12,300 @@
     qemu_register_machine(&mips_machine);
 }
 
+static void save_tc(QEMUFile *f, TCState *tc)
+{
+    int i;
+
+    /* Save active TC */
+    for(i = 0; i < 32; i++)
+        qemu_put_betls(f, &tc->gpr[i]);
+    qemu_put_betls(f, &tc->PC);
+    for(i = 0; i < MIPS_DSP_ACC; i++)
+        qemu_put_betls(f, &tc->HI[i]);
+    for(i = 0; i < MIPS_DSP_ACC; i++)
+        qemu_put_betls(f, &tc->LO[i]);
+    for(i = 0; i < MIPS_DSP_ACC; i++)
+        qemu_put_betls(f, &tc->ACX[i]);
+    qemu_put_betls(f, &tc->DSPControl);
+    qemu_put_sbe32s(f, &tc->CP0_TCStatus);
+    qemu_put_sbe32s(f, &tc->CP0_TCBind);
+    qemu_put_betls(f, &tc->CP0_TCHalt);
+    qemu_put_betls(f, &tc->CP0_TCContext);
+    qemu_put_betls(f, &tc->CP0_TCSchedule);
+    qemu_put_betls(f, &tc->CP0_TCScheFBack);
+    qemu_put_sbe32s(f, &tc->CP0_Debug_tcstatus);
+}
+
+static void save_fpu(QEMUFile *f, CPUMIPSFPUContext *fpu)
+{
+    int i;
+
+    for(i = 0; i < 32; i++)
+        qemu_put_be64s(f, &fpu->fpr[i].d);
+    qemu_put_s8s(f, &fpu->fp_status.float_detect_tininess);
+    qemu_put_s8s(f, &fpu->fp_status.float_rounding_mode);
+    qemu_put_s8s(f, &fpu->fp_status.float_exception_flags);
+    qemu_put_be32s(f, &fpu->fcr0);
+    qemu_put_be32s(f, &fpu->fcr31);
+}
+
 void cpu_save(QEMUFile *f, void *opaque)
 {
+    CPUState *env = opaque;
+    int i;
+
+    /* Save active TC */
+    save_tc(f, &env->active_tc);
+
+    /* Save active FPU */
+    save_fpu(f, &env->active_fpu);
+
+    /* Save MVP */
+    qemu_put_sbe32s(f, &env->mvp->CP0_MVPControl);
+    qemu_put_sbe32s(f, &env->mvp->CP0_MVPConf0);
+    qemu_put_sbe32s(f, &env->mvp->CP0_MVPConf1);
+
+    /* Save TLB */
+    qemu_put_be32s(f, &env->tlb->nb_tlb);
+    qemu_put_be32s(f, &env->tlb->tlb_in_use);
+    for(i = 0; i < MIPS_TLB_MAX; i++) {
+        uint16_t flags = ((env->tlb->mmu.r4k.tlb[i].G << 10) |
+                          (env->tlb->mmu.r4k.tlb[i].C0 << 7) |
+                          (env->tlb->mmu.r4k.tlb[i].C1 << 4) |
+                          (env->tlb->mmu.r4k.tlb[i].V0 << 3) |
+                          (env->tlb->mmu.r4k.tlb[i].V1 << 2) |
+                          (env->tlb->mmu.r4k.tlb[i].D0 << 1) |
+                          (env->tlb->mmu.r4k.tlb[i].D1 << 0));
+
+        qemu_put_betls(f, &env->tlb->mmu.r4k.tlb[i].VPN);
+        qemu_put_be32s(f, &env->tlb->mmu.r4k.tlb[i].PageMask);
+        qemu_put_8s(f, &env->tlb->mmu.r4k.tlb[i].ASID);
+        qemu_put_be16s(f, &flags);
+        qemu_put_betls(f, &env->tlb->mmu.r4k.tlb[i].PFN[0]);
+        qemu_put_betls(f, &env->tlb->mmu.r4k.tlb[i].PFN[1]);
+    }
+
+    /* Save CPU metastate */
+    qemu_put_be32s(f, &env->current_tc);
+    qemu_put_be32s(f, &env->current_fpu);
+    qemu_put_sbe32s(f, &env->error_code);
+    qemu_put_be32s(f, &env->hflags);
+    qemu_put_betls(f, &env->btarget);
+    qemu_put_sbe32s(f, &env->bcond);
+
+    /* Save remaining CP1 registers */
+    qemu_put_sbe32s(f, &env->CP0_Index);
+    qemu_put_sbe32s(f, &env->CP0_Random);
+    qemu_put_sbe32s(f, &env->CP0_VPEControl);
+    qemu_put_sbe32s(f, &env->CP0_VPEConf0);
+    qemu_put_sbe32s(f, &env->CP0_VPEConf1);
+    qemu_put_betls(f, &env->CP0_YQMask);
+    qemu_put_betls(f, &env->CP0_VPESchedule);
+    qemu_put_betls(f, &env->CP0_VPEScheFBack);
+    qemu_put_sbe32s(f, &env->CP0_VPEOpt);
+    qemu_put_betls(f, &env->CP0_EntryLo0);
+    qemu_put_betls(f, &env->CP0_EntryLo1);
+    qemu_put_betls(f, &env->CP0_Context);
+    qemu_put_sbe32s(f, &env->CP0_PageMask);
+    qemu_put_sbe32s(f, &env->CP0_PageGrain);
+    qemu_put_sbe32s(f, &env->CP0_Wired);
+    qemu_put_sbe32s(f, &env->CP0_SRSConf0);
+    qemu_put_sbe32s(f, &env->CP0_SRSConf1);
+    qemu_put_sbe32s(f, &env->CP0_SRSConf2);
+    qemu_put_sbe32s(f, &env->CP0_SRSConf3);
+    qemu_put_sbe32s(f, &env->CP0_SRSConf4);
+    qemu_put_sbe32s(f, &env->CP0_HWREna);
+    qemu_put_betls(f, &env->CP0_BadVAddr);
+    qemu_put_sbe32s(f, &env->CP0_Count);
+    qemu_put_betls(f, &env->CP0_EntryHi);
+    qemu_put_sbe32s(f, &env->CP0_Compare);
+    qemu_put_sbe32s(f, &env->CP0_Status);
+    qemu_put_sbe32s(f, &env->CP0_IntCtl);
+    qemu_put_sbe32s(f, &env->CP0_SRSCtl);
+    qemu_put_sbe32s(f, &env->CP0_SRSMap);
+    qemu_put_sbe32s(f, &env->CP0_Cause);
+    qemu_put_betls(f, &env->CP0_EPC);
+    qemu_put_sbe32s(f, &env->CP0_PRid);
+    qemu_put_sbe32s(f, &env->CP0_EBase);
+    qemu_put_sbe32s(f, &env->CP0_Config0);
+    qemu_put_sbe32s(f, &env->CP0_Config1);
+    qemu_put_sbe32s(f, &env->CP0_Config2);
+    qemu_put_sbe32s(f, &env->CP0_Config3);
+    qemu_put_sbe32s(f, &env->CP0_Config6);
+    qemu_put_sbe32s(f, &env->CP0_Config7);
+    qemu_put_betls(f, &env->CP0_LLAddr);
+    for(i = 0; i < 8; i++)
+        qemu_put_betls(f, &env->CP0_WatchLo[i]);
+    for(i = 0; i < 8; i++)
+        qemu_put_sbe32s(f, &env->CP0_WatchHi[i]);
+    qemu_put_betls(f, &env->CP0_XContext);
+    qemu_put_sbe32s(f, &env->CP0_Framemask);
+    qemu_put_sbe32s(f, &env->CP0_Debug);
+    qemu_put_betls(f, &env->CP0_DEPC);
+    qemu_put_sbe32s(f, &env->CP0_Performance0);
+    qemu_put_sbe32s(f, &env->CP0_TagLo);
+    qemu_put_sbe32s(f, &env->CP0_DataLo);
+    qemu_put_sbe32s(f, &env->CP0_TagHi);
+    qemu_put_sbe32s(f, &env->CP0_DataHi);
+    qemu_put_betls(f, &env->CP0_ErrorEPC);
+    qemu_put_sbe32s(f, &env->CP0_DESAVE);
+
+    /* Save inactive TC state */
+    for (i = 0; i < MIPS_SHADOW_SET_MAX; i++)
+        save_tc(f, &env->tcs[i]);
+    for (i = 0; i < MIPS_FPU_MAX; i++)
+        save_fpu(f, &env->fpus[i]);
 }
 
+static void load_tc(QEMUFile *f, TCState *tc)
+{
+    int i;
+
+    /* Save active TC */
+    for(i = 0; i < 32; i++)
+        qemu_get_betls(f, &tc->gpr[i]);
+    qemu_get_betls(f, &tc->PC);
+    for(i = 0; i < MIPS_DSP_ACC; i++)
+        qemu_get_betls(f, &tc->HI[i]);
+    for(i = 0; i < MIPS_DSP_ACC; i++)
+        qemu_get_betls(f, &tc->LO[i]);
+    for(i = 0; i < MIPS_DSP_ACC; i++)
+        qemu_get_betls(f, &tc->ACX[i]);
+    qemu_get_betls(f, &tc->DSPControl);
+    qemu_get_sbe32s(f, &tc->CP0_TCStatus);
+    qemu_get_sbe32s(f, &tc->CP0_TCBind);
+    qemu_get_betls(f, &tc->CP0_TCHalt);
+    qemu_get_betls(f, &tc->CP0_TCContext);
+    qemu_get_betls(f, &tc->CP0_TCSchedule);
+    qemu_get_betls(f, &tc->CP0_TCScheFBack);
+    qemu_get_sbe32s(f, &tc->CP0_Debug_tcstatus);
+}
+
+static void load_fpu(QEMUFile *f, CPUMIPSFPUContext *fpu)
+{
+    int i;
+
+    for(i = 0; i < 32; i++)
+        qemu_get_be64s(f, &fpu->fpr[i].d);
+    qemu_get_s8s(f, &fpu->fp_status.float_detect_tininess);
+    qemu_get_s8s(f, &fpu->fp_status.float_rounding_mode);
+    qemu_get_s8s(f, &fpu->fp_status.float_exception_flags);
+    qemu_get_be32s(f, &fpu->fcr0);
+    qemu_get_be32s(f, &fpu->fcr31);
+}
+
 int cpu_load(QEMUFile *f, void *opaque, int version_id)
 {
+    CPUState *env = opaque;
+    int i;
+
+    if (version_id != 3)
+        return -EINVAL;
+
+    /* Load active TC */
+    load_tc(f, &env->active_tc);
+
+    /* Load active FPU */
+    load_fpu(f, &env->active_fpu);
+
+    /* Load MVP */
+    qemu_get_sbe32s(f, &env->mvp->CP0_MVPControl);
+    qemu_get_sbe32s(f, &env->mvp->CP0_MVPConf0);
+    qemu_get_sbe32s(f, &env->mvp->CP0_MVPConf1);
+
+    /* Load TLB */
+    qemu_get_be32s(f, &env->tlb->nb_tlb);
+    qemu_get_be32s(f, &env->tlb->tlb_in_use);
+    for(i = 0; i < MIPS_TLB_MAX; i++) {
+        uint16_t flags;
+
+        qemu_get_betls(f, &env->tlb->mmu.r4k.tlb[i].VPN);
+        qemu_get_be32s(f, &env->tlb->mmu.r4k.tlb[i].PageMask);
+        qemu_get_8s(f, &env->tlb->mmu.r4k.tlb[i].ASID);
+        qemu_get_be16s(f, &flags);
+        env->tlb->mmu.r4k.tlb[i].G = (flags >> 10) & 1;
+        env->tlb->mmu.r4k.tlb[i].C0 = (flags >> 7) & 3;
+        env->tlb->mmu.r4k.tlb[i].C1 = (flags >> 4) & 3;
+        env->tlb->mmu.r4k.tlb[i].V0 = (flags >> 3) & 1;
+        env->tlb->mmu.r4k.tlb[i].V1 = (flags >> 2) & 1;
+        env->tlb->mmu.r4k.tlb[i].D0 = (flags >> 1) & 1;
+        env->tlb->mmu.r4k.tlb[i].D1 = (flags >> 0) & 1;
+        qemu_get_betls(f, &env->tlb->mmu.r4k.tlb[i].PFN[0]);
+        qemu_get_betls(f, &env->tlb->mmu.r4k.tlb[i].PFN[1]);
+    }
+
+    /* Load CPU metastate */
+    qemu_get_be32s(f, &env->current_tc);
+    qemu_get_be32s(f, &env->current_fpu);
+    qemu_get_sbe32s(f, &env->error_code);
+    qemu_get_be32s(f, &env->hflags);
+    qemu_get_betls(f, &env->btarget);
+    qemu_get_sbe32s(f, &env->bcond);
+
+    /* Load remaining CP1 registers */
+    qemu_get_sbe32s(f, &env->CP0_Index);
+    qemu_get_sbe32s(f, &env->CP0_Random);
+    qemu_get_sbe32s(f, &env->CP0_VPEControl);
+    qemu_get_sbe32s(f, &env->CP0_VPEConf0);
+    qemu_get_sbe32s(f, &env->CP0_VPEConf1);
+    qemu_get_betls(f, &env->CP0_YQMask);
+    qemu_get_betls(f, &env->CP0_VPESchedule);
+    qemu_get_betls(f, &env->CP0_VPEScheFBack);
+    qemu_get_sbe32s(f, &env->CP0_VPEOpt);
+    qemu_get_betls(f, &env->CP0_EntryLo0);
+    qemu_get_betls(f, &env->CP0_EntryLo1);
+    qemu_get_betls(f, &env->CP0_Context);
+    qemu_get_sbe32s(f, &env->CP0_PageMask);
+    qemu_get_sbe32s(f, &env->CP0_PageGrain);
+    qemu_get_sbe32s(f, &env->CP0_Wired);
+    qemu_get_sbe32s(f, &env->CP0_SRSConf0);
+    qemu_get_sbe32s(f, &env->CP0_SRSConf1);
+    qemu_get_sbe32s(f, &env->CP0_SRSConf2);
+    qemu_get_sbe32s(f, &env->CP0_SRSConf3);
+    qemu_get_sbe32s(f, &env->CP0_SRSConf4);
+    qemu_get_sbe32s(f, &env->CP0_HWREna);
+    qemu_get_betls(f, &env->CP0_BadVAddr);
+    qemu_get_sbe32s(f, &env->CP0_Count);
+    qemu_get_betls(f, &env->CP0_EntryHi);
+    qemu_get_sbe32s(f, &env->CP0_Compare);
+    qemu_get_sbe32s(f, &env->CP0_Status);
+    qemu_get_sbe32s(f, &env->CP0_IntCtl);
+    qemu_get_sbe32s(f, &env->CP0_SRSCtl);
+    qemu_get_sbe32s(f, &env->CP0_SRSMap);
+    qemu_get_sbe32s(f, &env->CP0_Cause);
+    qemu_get_betls(f, &env->CP0_EPC);
+    qemu_get_sbe32s(f, &env->CP0_PRid);
+    qemu_get_sbe32s(f, &env->CP0_EBase);
+    qemu_get_sbe32s(f, &env->CP0_Config0);
+    qemu_get_sbe32s(f, &env->CP0_Config1);
+    qemu_get_sbe32s(f, &env->CP0_Config2);
+    qemu_get_sbe32s(f, &env->CP0_Config3);
+    qemu_get_sbe32s(f, &env->CP0_Config6);
+    qemu_get_sbe32s(f, &env->CP0_Config7);
+    qemu_get_betls(f, &env->CP0_LLAddr);
+    for(i = 0; i < 8; i++)
+        qemu_get_betls(f, &env->CP0_WatchLo[i]);
+    for(i = 0; i < 8; i++)
+        qemu_get_sbe32s(f, &env->CP0_WatchHi[i]);
+    qemu_get_betls(f, &env->CP0_XContext);
+    qemu_get_sbe32s(f, &env->CP0_Framemask);
+    qemu_get_sbe32s(f, &env->CP0_Debug);
+    qemu_get_betls(f, &env->CP0_DEPC);
+    qemu_get_sbe32s(f, &env->CP0_Performance0);
+    qemu_get_sbe32s(f, &env->CP0_TagLo);
+    qemu_get_sbe32s(f, &env->CP0_DataLo);
+    qemu_get_sbe32s(f, &env->CP0_TagHi);
+    qemu_get_sbe32s(f, &env->CP0_DataHi);
+    qemu_get_betls(f, &env->CP0_ErrorEPC);
+    qemu_get_sbe32s(f, &env->CP0_DESAVE);
+
+    /* Load inactive TC state */
+    for (i = 0; i < MIPS_SHADOW_SET_MAX; i++)
+        load_tc(f, &env->tcs[i]);
+    for (i = 0; i < MIPS_FPU_MAX; i++)
+        load_fpu(f, &env->fpus[i]);
+
+    /* XXX: ensure compatiblity for halted bit ? */
+    tlb_flush(env, 1);
     return 0;
 }