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xemu/target-mips/machine.c
Petar Jovanovic d279279e2b target-mips: implement UserLocal Register 
From MIPS documentation (Volume III):

UserLocal Register (CP0 Register 4, Select 2)
Compliance Level: Recommended.

The UserLocal register is a read-write register that is not interpreted by
the hardware and conditionally readable via the RDHWR instruction.

This register only exists if the Config3-ULRI register field is set.

Privileged software may write this register with arbitrary information and
make it accessible to unprivileged software via register 29 (ULR) of the
RDHWR instruction. To do so, bit 29 of the HWREna register must be set to a
1 to enable unprivileged access to the register.

Signed-off-by: Petar Jovanovic <petar.jovanovic@imgtec.com>
Reviewed-by: Andreas Färber <afaerber@suse.de>
Reviewed-by: Aurelien Jarno <aurelien@aurel32.net>
Signed-off-by: Aurelien Jarno <aurelien@aurel32.net>
2014-06-18 18:10:47 +02:00

316 lines
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#include "hw/hw.h"
#include "hw/boards.h"
#include "cpu.h"
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);
qemu_put_betls(f, &tc->CP0_UserLocal);
}
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)
{
CPUMIPSState *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));
uint8_t asid;
qemu_put_betls(f, &env->tlb->mmu.r4k.tlb[i].VPN);
qemu_put_be32s(f, &env->tlb->mmu.r4k.tlb[i].PageMask);
asid = env->tlb->mmu.r4k.tlb[i].ASID;
qemu_put_8s(f, &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);
i = env->bcond;
qemu_put_sbe32s(f, &i);
/* 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->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 version_id)
{
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);
if (version_id >= 4) {
qemu_get_betls(f, &tc->CP0_UserLocal);
}
}
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)
{
CPUMIPSState *env = opaque;
MIPSCPU *cpu = mips_env_get_cpu(env);
int i;
if (version_id < 3) {
return -EINVAL;
}
/* Load active TC */
load_tc(f, &env->active_tc, version_id);
/* 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;
uint8_t asid;
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, &asid);
env->tlb->mmu.r4k.tlb[i].ASID = 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, &i);
env->bcond = i;
/* 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->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], version_id);
}
for (i = 0; i < MIPS_FPU_MAX; i++)
load_fpu(f, &env->fpus[i]);
/* XXX: ensure compatibility for halted bit ? */
tlb_flush(CPU(cpu), 1);
return 0;
}
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