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qemu-e2k/target/mips/machine.c
James Hogan cec56a733d target/mips: Add segmentation control registers 
The optional segmentation control registers CP0_SegCtl0, CP0_SegCtl1 &
CP0_SegCtl2 control the behaviour and required privilege of the legacy
virtual memory segments.

Add them to the CP0 interface so they can be read and written when
CP0_Config3.SC=1, and initialise them to describe the standard legacy
layout so they can be used in future patches regardless of whether they
are exposed to the guest.

Signed-off-by: James Hogan <james.hogan@imgtec.com>
Cc: Yongbok Kim <yongbok.kim@imgtec.com>
Cc: Aurelien Jarno <aurelien@aurel32.net>
Reviewed-by: Yongbok Kim <yongbok.kim@imgtec.com>
Signed-off-by: Yongbok Kim <yongbok.kim@imgtec.com>
2017-07-20 22:42:26 +01:00

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#include "qemu/osdep.h"
#include "qemu-common.h"
#include "cpu.h"
#include "hw/hw.h"
#include "migration/cpu.h"
static int cpu_post_load(void *opaque, int version_id)
{
MIPSCPU *cpu = opaque;
CPUMIPSState *env = &cpu->env;
restore_fp_status(env);
restore_msa_fp_status(env);
compute_hflags(env);
restore_pamask(env);
return 0;
}
/* FPU state */
static int get_fpr(QEMUFile *f, void *pv, size_t size, VMStateField *field)
{
int i;
fpr_t *v = pv;
/* Restore entire MSA vector register */
for (i = 0; i < MSA_WRLEN/64; i++) {
qemu_get_sbe64s(f, &v->wr.d[i]);
}
return 0;
}
static int put_fpr(QEMUFile *f, void *pv, size_t size, VMStateField *field,
QJSON *vmdesc)
{
int i;
fpr_t *v = pv;
/* Save entire MSA vector register */
for (i = 0; i < MSA_WRLEN/64; i++) {
qemu_put_sbe64s(f, &v->wr.d[i]);
}
return 0;
}
const VMStateInfo vmstate_info_fpr = {
.name = "fpr",
.get = get_fpr,
.put = put_fpr,
};
#define VMSTATE_FPR_ARRAY_V(_f, _s, _n, _v) \
VMSTATE_ARRAY(_f, _s, _n, _v, vmstate_info_fpr, fpr_t)
#define VMSTATE_FPR_ARRAY(_f, _s, _n) \
VMSTATE_FPR_ARRAY_V(_f, _s, _n, 0)
static VMStateField vmstate_fpu_fields[] = {
VMSTATE_FPR_ARRAY(fpr, CPUMIPSFPUContext, 32),
VMSTATE_UINT32(fcr0, CPUMIPSFPUContext),
VMSTATE_UINT32(fcr31, CPUMIPSFPUContext),
VMSTATE_END_OF_LIST()
};
const VMStateDescription vmstate_fpu = {
.name = "cpu/fpu",
.version_id = 1,
.minimum_version_id = 1,
.fields = vmstate_fpu_fields
};
const VMStateDescription vmstate_inactive_fpu = {
.name = "cpu/inactive_fpu",
.version_id = 1,
.minimum_version_id = 1,
.fields = vmstate_fpu_fields
};
/* TC state */
static VMStateField vmstate_tc_fields[] = {
VMSTATE_UINTTL_ARRAY(gpr, TCState, 32),
VMSTATE_UINTTL(PC, TCState),
VMSTATE_UINTTL_ARRAY(HI, TCState, MIPS_DSP_ACC),
VMSTATE_UINTTL_ARRAY(LO, TCState, MIPS_DSP_ACC),
VMSTATE_UINTTL_ARRAY(ACX, TCState, MIPS_DSP_ACC),
VMSTATE_UINTTL(DSPControl, TCState),
VMSTATE_INT32(CP0_TCStatus, TCState),
VMSTATE_INT32(CP0_TCBind, TCState),
VMSTATE_UINTTL(CP0_TCHalt, TCState),
VMSTATE_UINTTL(CP0_TCContext, TCState),
VMSTATE_UINTTL(CP0_TCSchedule, TCState),
VMSTATE_UINTTL(CP0_TCScheFBack, TCState),
VMSTATE_INT32(CP0_Debug_tcstatus, TCState),
VMSTATE_UINTTL(CP0_UserLocal, TCState),
VMSTATE_INT32(msacsr, TCState),
VMSTATE_END_OF_LIST()
};
const VMStateDescription vmstate_tc = {
.name = "cpu/tc",
.version_id = 1,
.minimum_version_id = 1,
.fields = vmstate_tc_fields
};
const VMStateDescription vmstate_inactive_tc = {
.name = "cpu/inactive_tc",
.version_id = 1,
.minimum_version_id = 1,
.fields = vmstate_tc_fields
};
/* MVP state */
const VMStateDescription vmstate_mvp = {
.name = "cpu/mvp",
.version_id = 1,
.minimum_version_id = 1,
.fields = (VMStateField[]) {
VMSTATE_INT32(CP0_MVPControl, CPUMIPSMVPContext),
VMSTATE_INT32(CP0_MVPConf0, CPUMIPSMVPContext),
VMSTATE_INT32(CP0_MVPConf1, CPUMIPSMVPContext),
VMSTATE_END_OF_LIST()
}
};
/* TLB state */
static int get_tlb(QEMUFile *f, void *pv, size_t size, VMStateField *field)
{
r4k_tlb_t *v = pv;
uint16_t flags;
qemu_get_betls(f, &v->VPN);
qemu_get_be32s(f, &v->PageMask);
qemu_get_be16s(f, &v->ASID);
qemu_get_be16s(f, &flags);
v->G = (flags >> 10) & 1;
v->C0 = (flags >> 7) & 3;
v->C1 = (flags >> 4) & 3;
v->V0 = (flags >> 3) & 1;
v->V1 = (flags >> 2) & 1;
v->D0 = (flags >> 1) & 1;
v->D1 = (flags >> 0) & 1;
v->EHINV = (flags >> 15) & 1;
v->RI1 = (flags >> 14) & 1;
v->RI0 = (flags >> 13) & 1;
v->XI1 = (flags >> 12) & 1;
v->XI0 = (flags >> 11) & 1;
qemu_get_be64s(f, &v->PFN[0]);
qemu_get_be64s(f, &v->PFN[1]);
return 0;
}
static int put_tlb(QEMUFile *f, void *pv, size_t size, VMStateField *field,
QJSON *vmdesc)
{
r4k_tlb_t *v = pv;
uint16_t asid = v->ASID;
uint16_t flags = ((v->EHINV << 15) |
(v->RI1 << 14) |
(v->RI0 << 13) |
(v->XI1 << 12) |
(v->XI0 << 11) |
(v->G << 10) |
(v->C0 << 7) |
(v->C1 << 4) |
(v->V0 << 3) |
(v->V1 << 2) |
(v->D0 << 1) |
(v->D1 << 0));
qemu_put_betls(f, &v->VPN);
qemu_put_be32s(f, &v->PageMask);
qemu_put_be16s(f, &asid);
qemu_put_be16s(f, &flags);
qemu_put_be64s(f, &v->PFN[0]);
qemu_put_be64s(f, &v->PFN[1]);
return 0;
}
const VMStateInfo vmstate_info_tlb = {
.name = "tlb_entry",
.get = get_tlb,
.put = put_tlb,
};
#define VMSTATE_TLB_ARRAY_V(_f, _s, _n, _v) \
VMSTATE_ARRAY(_f, _s, _n, _v, vmstate_info_tlb, r4k_tlb_t)
#define VMSTATE_TLB_ARRAY(_f, _s, _n) \
VMSTATE_TLB_ARRAY_V(_f, _s, _n, 0)
const VMStateDescription vmstate_tlb = {
.name = "cpu/tlb",
.version_id = 2,
.minimum_version_id = 2,
.fields = (VMStateField[]) {
VMSTATE_UINT32(nb_tlb, CPUMIPSTLBContext),
VMSTATE_UINT32(tlb_in_use, CPUMIPSTLBContext),
VMSTATE_TLB_ARRAY(mmu.r4k.tlb, CPUMIPSTLBContext, MIPS_TLB_MAX),
VMSTATE_END_OF_LIST()
}
};
/* MIPS CPU state */
const VMStateDescription vmstate_mips_cpu = {
.name = "cpu",
.version_id = 10,
.minimum_version_id = 10,
.post_load = cpu_post_load,
.fields = (VMStateField[]) {
/* Active TC */
VMSTATE_STRUCT(env.active_tc, MIPSCPU, 1, vmstate_tc, TCState),
/* Active FPU */
VMSTATE_STRUCT(env.active_fpu, MIPSCPU, 1, vmstate_fpu,
CPUMIPSFPUContext),
/* MVP */
VMSTATE_STRUCT_POINTER(env.mvp, MIPSCPU, vmstate_mvp,
CPUMIPSMVPContext),
/* TLB */
VMSTATE_STRUCT_POINTER(env.tlb, MIPSCPU, vmstate_tlb,
CPUMIPSTLBContext),
/* CPU metastate */
VMSTATE_UINT32(env.current_tc, MIPSCPU),
VMSTATE_UINT32(env.current_fpu, MIPSCPU),
VMSTATE_INT32(env.error_code, MIPSCPU),
VMSTATE_UINTTL(env.btarget, MIPSCPU),
VMSTATE_UINTTL(env.bcond, MIPSCPU),
/* Remaining CP0 registers */
VMSTATE_INT32(env.CP0_Index, MIPSCPU),
VMSTATE_INT32(env.CP0_Random, MIPSCPU),
VMSTATE_INT32(env.CP0_VPEControl, MIPSCPU),
VMSTATE_INT32(env.CP0_VPEConf0, MIPSCPU),
VMSTATE_INT32(env.CP0_VPEConf1, MIPSCPU),
VMSTATE_UINTTL(env.CP0_YQMask, MIPSCPU),
VMSTATE_UINTTL(env.CP0_VPESchedule, MIPSCPU),
VMSTATE_UINTTL(env.CP0_VPEScheFBack, MIPSCPU),
VMSTATE_INT32(env.CP0_VPEOpt, MIPSCPU),
VMSTATE_UINT64(env.CP0_EntryLo0, MIPSCPU),
VMSTATE_UINT64(env.CP0_EntryLo1, MIPSCPU),
VMSTATE_UINTTL(env.CP0_Context, MIPSCPU),
VMSTATE_INT32(env.CP0_PageMask, MIPSCPU),
VMSTATE_INT32(env.CP0_PageGrain, MIPSCPU),
VMSTATE_UINTTL(env.CP0_SegCtl0, MIPSCPU),
VMSTATE_UINTTL(env.CP0_SegCtl1, MIPSCPU),
VMSTATE_UINTTL(env.CP0_SegCtl2, MIPSCPU),
VMSTATE_INT32(env.CP0_Wired, MIPSCPU),
VMSTATE_INT32(env.CP0_SRSConf0, MIPSCPU),
VMSTATE_INT32(env.CP0_SRSConf1, MIPSCPU),
VMSTATE_INT32(env.CP0_SRSConf2, MIPSCPU),
VMSTATE_INT32(env.CP0_SRSConf3, MIPSCPU),
VMSTATE_INT32(env.CP0_SRSConf4, MIPSCPU),
VMSTATE_INT32(env.CP0_HWREna, MIPSCPU),
VMSTATE_UINTTL(env.CP0_BadVAddr, MIPSCPU),
VMSTATE_UINT32(env.CP0_BadInstr, MIPSCPU),
VMSTATE_UINT32(env.CP0_BadInstrP, MIPSCPU),
VMSTATE_INT32(env.CP0_Count, MIPSCPU),
VMSTATE_UINTTL(env.CP0_EntryHi, MIPSCPU),
VMSTATE_INT32(env.CP0_Compare, MIPSCPU),
VMSTATE_INT32(env.CP0_Status, MIPSCPU),
VMSTATE_INT32(env.CP0_IntCtl, MIPSCPU),
VMSTATE_INT32(env.CP0_SRSCtl, MIPSCPU),
VMSTATE_INT32(env.CP0_SRSMap, MIPSCPU),
VMSTATE_INT32(env.CP0_Cause, MIPSCPU),
VMSTATE_UINTTL(env.CP0_EPC, MIPSCPU),
VMSTATE_INT32(env.CP0_PRid, MIPSCPU),
VMSTATE_UINTTL(env.CP0_EBase, MIPSCPU),
VMSTATE_INT32(env.CP0_Config0, MIPSCPU),
VMSTATE_INT32(env.CP0_Config1, MIPSCPU),
VMSTATE_INT32(env.CP0_Config2, MIPSCPU),
VMSTATE_INT32(env.CP0_Config3, MIPSCPU),
VMSTATE_INT32(env.CP0_Config6, MIPSCPU),
VMSTATE_INT32(env.CP0_Config7, MIPSCPU),
VMSTATE_UINT64_ARRAY(env.CP0_MAAR, MIPSCPU, MIPS_MAAR_MAX),
VMSTATE_INT32(env.CP0_MAARI, MIPSCPU),
VMSTATE_UINT64(env.lladdr, MIPSCPU),
VMSTATE_UINTTL_ARRAY(env.CP0_WatchLo, MIPSCPU, 8),
VMSTATE_INT32_ARRAY(env.CP0_WatchHi, MIPSCPU, 8),
VMSTATE_UINTTL(env.CP0_XContext, MIPSCPU),
VMSTATE_INT32(env.CP0_Framemask, MIPSCPU),
VMSTATE_INT32(env.CP0_Debug, MIPSCPU),
VMSTATE_UINTTL(env.CP0_DEPC, MIPSCPU),
VMSTATE_INT32(env.CP0_Performance0, MIPSCPU),
VMSTATE_UINT64(env.CP0_TagLo, MIPSCPU),
VMSTATE_INT32(env.CP0_DataLo, MIPSCPU),
VMSTATE_INT32(env.CP0_TagHi, MIPSCPU),
VMSTATE_INT32(env.CP0_DataHi, MIPSCPU),
VMSTATE_UINTTL(env.CP0_ErrorEPC, MIPSCPU),
VMSTATE_INT32(env.CP0_DESAVE, MIPSCPU),
VMSTATE_UINTTL_ARRAY(env.CP0_KScratch, MIPSCPU, MIPS_KSCRATCH_NUM),
/* Inactive TC */
VMSTATE_STRUCT_ARRAY(env.tcs, MIPSCPU, MIPS_SHADOW_SET_MAX, 1,
vmstate_inactive_tc, TCState),
VMSTATE_STRUCT_ARRAY(env.fpus, MIPSCPU, MIPS_FPU_MAX, 1,
vmstate_inactive_fpu, CPUMIPSFPUContext),
VMSTATE_END_OF_LIST()
},
};
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