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b263688d23
qemu/target/mips/cpu.c
Jiaxun Yang b263688d23 target/mips: Rework cp0_timer with clock API 
Previous implementation of MIPS cp0_timer computes a
cp0_count_ns based on input clock. However rounding
error of cp0_count_ns can affect precision of cp0_timer.

Using clock API and a divider for cp0_timer, so we can
use clock_ns_to_ticks/clock_ns_to_ticks to avoid rounding
issue.

Also workaround the situation that in such handler flow:

count = read_c0_count()
write_c0_compare(count)

If timer had not progressed when compare was written, the
interrupt would trigger again.

Signed-off-by: Jiaxun Yang <jiaxun.yang@flygoat.com>
Reviewed-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Message-Id: <20230521110037.90049-1-jiaxun.yang@flygoat.com>
Signed-off-by: Philippe Mathieu-Daudé <philmd@linaro.org>
2023-07-10 21:53:03 +02:00

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/*
* QEMU MIPS CPU
*
* Copyright (c) 2012 SUSE LINUX Products GmbH
*
* 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 2.1 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/lgpl-2.1.html>
*/
#include "qemu/osdep.h"
#include "qemu/cutils.h"
#include "qemu/qemu-print.h"
#include "qemu/error-report.h"
#include "qapi/error.h"
#include "cpu.h"
#include "internal.h"
#include "kvm_mips.h"
#include "qemu/module.h"
#include "sysemu/kvm.h"
#include "sysemu/qtest.h"
#include "exec/exec-all.h"
#include "hw/qdev-properties.h"
#include "hw/qdev-clock.h"
#include "semihosting/semihost.h"
#include "fpu_helper.h"
const char regnames[32][3] = {
"r0", "at", "v0", "v1", "a0", "a1", "a2", "a3",
"t0", "t1", "t2", "t3", "t4", "t5", "t6", "t7",
"s0", "s1", "s2", "s3", "s4", "s5", "s6", "s7",
"t8", "t9", "k0", "k1", "gp", "sp", "s8", "ra",
};
static void fpu_dump_fpr(fpr_t *fpr, FILE *f, bool is_fpu64)
{
if (is_fpu64) {
qemu_fprintf(f, "w:%08x d:%016" PRIx64 " fd:%13g fs:%13g psu: %13g\n",
fpr->w[FP_ENDIAN_IDX], fpr->d,
(double)fpr->fd,
(double)fpr->fs[FP_ENDIAN_IDX],
(double)fpr->fs[!FP_ENDIAN_IDX]);
} else {
fpr_t tmp;
tmp.w[FP_ENDIAN_IDX] = fpr->w[FP_ENDIAN_IDX];
tmp.w[!FP_ENDIAN_IDX] = (fpr + 1)->w[FP_ENDIAN_IDX];
qemu_fprintf(f, "w:%08x d:%016" PRIx64 " fd:%13g fs:%13g psu:%13g\n",
tmp.w[FP_ENDIAN_IDX], tmp.d,
(double)tmp.fd,
(double)tmp.fs[FP_ENDIAN_IDX],
(double)tmp.fs[!FP_ENDIAN_IDX]);
}
}
static void fpu_dump_state(CPUMIPSState *env, FILE *f, int flags)
{
int i;
bool is_fpu64 = !!(env->hflags & MIPS_HFLAG_F64);
qemu_fprintf(f,
"CP1 FCR0 0x%08x FCR31 0x%08x SR.FR %d fp_status 0x%02x\n",
env->active_fpu.fcr0, env->active_fpu.fcr31, is_fpu64,
get_float_exception_flags(&env->active_fpu.fp_status));
for (i = 0; i < 32; (is_fpu64) ? i++ : (i += 2)) {
qemu_fprintf(f, "%3s: ", fregnames[i]);
fpu_dump_fpr(&env->active_fpu.fpr[i], f, is_fpu64);
}
}
static void mips_cpu_dump_state(CPUState *cs, FILE *f, int flags)
{
MIPSCPU *cpu = MIPS_CPU(cs);
CPUMIPSState *env = &cpu->env;
int i;
qemu_fprintf(f, "pc=0x" TARGET_FMT_lx " HI=0x" TARGET_FMT_lx
" LO=0x" TARGET_FMT_lx " ds %04x "
TARGET_FMT_lx " " TARGET_FMT_ld "\n",
env->active_tc.PC, env->active_tc.HI[0], env->active_tc.LO[0],
env->hflags, env->btarget, env->bcond);
for (i = 0; i < 32; i++) {
if ((i & 3) == 0) {
qemu_fprintf(f, "GPR%02d:", i);
}
qemu_fprintf(f, " %s " TARGET_FMT_lx,
regnames[i], env->active_tc.gpr[i]);
if ((i & 3) == 3) {
qemu_fprintf(f, "\n");
}
}
qemu_fprintf(f, "CP0 Status 0x%08x Cause 0x%08x EPC 0x"
TARGET_FMT_lx "\n",
env->CP0_Status, env->CP0_Cause, env->CP0_EPC);
qemu_fprintf(f, " Config0 0x%08x Config1 0x%08x LLAddr 0x%016"
PRIx64 "\n",
env->CP0_Config0, env->CP0_Config1, env->CP0_LLAddr);
qemu_fprintf(f, " Config2 0x%08x Config3 0x%08x\n",
env->CP0_Config2, env->CP0_Config3);
qemu_fprintf(f, " Config4 0x%08x Config5 0x%08x\n",
env->CP0_Config4, env->CP0_Config5);
if ((flags & CPU_DUMP_FPU) && (env->hflags & MIPS_HFLAG_FPU)) {
fpu_dump_state(env, f, flags);
}
}
void cpu_set_exception_base(int vp_index, target_ulong address)
{
MIPSCPU *vp = MIPS_CPU(qemu_get_cpu(vp_index));
vp->env.exception_base = address;
}
static void mips_cpu_set_pc(CPUState *cs, vaddr value)
{
MIPSCPU *cpu = MIPS_CPU(cs);
mips_env_set_pc(&cpu->env, value);
}
static vaddr mips_cpu_get_pc(CPUState *cs)
{
MIPSCPU *cpu = MIPS_CPU(cs);
return cpu->env.active_tc.PC;
}
static bool mips_cpu_has_work(CPUState *cs)
{
MIPSCPU *cpu = MIPS_CPU(cs);
CPUMIPSState *env = &cpu->env;
bool has_work = false;
/*
* Prior to MIPS Release 6 it is implementation dependent if non-enabled
* interrupts wake-up the CPU, however most of the implementations only
* check for interrupts that can be taken. For pre-release 6 CPUs,
* check for CP0 Config7 'Wait IE ignore' bit.
*/
if ((cs->interrupt_request & CPU_INTERRUPT_HARD) &&
cpu_mips_hw_interrupts_pending(env)) {
if (cpu_mips_hw_interrupts_enabled(env) ||
(env->CP0_Config7 & (1 << CP0C7_WII)) ||
(env->insn_flags & ISA_MIPS_R6)) {
has_work = true;
}
}
/* MIPS-MT has the ability to halt the CPU. */
if (ase_mt_available(env)) {
/*
* The QEMU model will issue an _WAKE request whenever the CPUs
* should be woken up.
*/
if (cs->interrupt_request & CPU_INTERRUPT_WAKE) {
has_work = true;
}
if (!mips_vpe_active(env)) {
has_work = false;
}
}
/* MIPS Release 6 has the ability to halt the CPU. */
if (env->CP0_Config5 & (1 << CP0C5_VP)) {
if (cs->interrupt_request & CPU_INTERRUPT_WAKE) {
has_work = true;
}
if (!mips_vp_active(env)) {
has_work = false;
}
}
return has_work;
}
#include "cpu-defs.c.inc"
static void mips_cpu_reset_hold(Object *obj)
{
CPUState *cs = CPU(obj);
MIPSCPU *cpu = MIPS_CPU(cs);
MIPSCPUClass *mcc = MIPS_CPU_GET_CLASS(cpu);
CPUMIPSState *env = &cpu->env;
if (mcc->parent_phases.hold) {
mcc->parent_phases.hold(obj);
}
memset(env, 0, offsetof(CPUMIPSState, end_reset_fields));
/* Reset registers to their default values */
env->CP0_PRid = env->cpu_model->CP0_PRid;
env->CP0_Config0 = env->cpu_model->CP0_Config0;
#if TARGET_BIG_ENDIAN
env->CP0_Config0 |= (1 << CP0C0_BE);
#endif
env->CP0_Config1 = env->cpu_model->CP0_Config1;
env->CP0_Config2 = env->cpu_model->CP0_Config2;
env->CP0_Config3 = env->cpu_model->CP0_Config3;
env->CP0_Config4 = env->cpu_model->CP0_Config4;
env->CP0_Config4_rw_bitmask = env->cpu_model->CP0_Config4_rw_bitmask;
env->CP0_Config5 = env->cpu_model->CP0_Config5;
env->CP0_Config5_rw_bitmask = env->cpu_model->CP0_Config5_rw_bitmask;
env->CP0_Config6 = env->cpu_model->CP0_Config6;
env->CP0_Config6_rw_bitmask = env->cpu_model->CP0_Config6_rw_bitmask;
env->CP0_Config7 = env->cpu_model->CP0_Config7;
env->CP0_Config7_rw_bitmask = env->cpu_model->CP0_Config7_rw_bitmask;
env->CP0_LLAddr_rw_bitmask = env->cpu_model->CP0_LLAddr_rw_bitmask
<< env->cpu_model->CP0_LLAddr_shift;
env->CP0_LLAddr_shift = env->cpu_model->CP0_LLAddr_shift;
env->SYNCI_Step = env->cpu_model->SYNCI_Step;
env->CCRes = env->cpu_model->CCRes;
env->CP0_Status_rw_bitmask = env->cpu_model->CP0_Status_rw_bitmask;
env->CP0_TCStatus_rw_bitmask = env->cpu_model->CP0_TCStatus_rw_bitmask;
env->CP0_SRSCtl = env->cpu_model->CP0_SRSCtl;
env->current_tc = 0;
env->SEGBITS = env->cpu_model->SEGBITS;
env->SEGMask = (target_ulong)((1ULL << env->cpu_model->SEGBITS) - 1);
#if defined(TARGET_MIPS64)
if (env->cpu_model->insn_flags & ISA_MIPS3) {
env->SEGMask |= 3ULL << 62;
}
#endif
env->PABITS = env->cpu_model->PABITS;
env->CP0_SRSConf0_rw_bitmask = env->cpu_model->CP0_SRSConf0_rw_bitmask;
env->CP0_SRSConf0 = env->cpu_model->CP0_SRSConf0;
env->CP0_SRSConf1_rw_bitmask = env->cpu_model->CP0_SRSConf1_rw_bitmask;
env->CP0_SRSConf1 = env->cpu_model->CP0_SRSConf1;
env->CP0_SRSConf2_rw_bitmask = env->cpu_model->CP0_SRSConf2_rw_bitmask;
env->CP0_SRSConf2 = env->cpu_model->CP0_SRSConf2;
env->CP0_SRSConf3_rw_bitmask = env->cpu_model->CP0_SRSConf3_rw_bitmask;
env->CP0_SRSConf3 = env->cpu_model->CP0_SRSConf3;
env->CP0_SRSConf4_rw_bitmask = env->cpu_model->CP0_SRSConf4_rw_bitmask;
env->CP0_SRSConf4 = env->cpu_model->CP0_SRSConf4;
env->CP0_PageGrain_rw_bitmask = env->cpu_model->CP0_PageGrain_rw_bitmask;
env->CP0_PageGrain = env->cpu_model->CP0_PageGrain;
env->CP0_EBaseWG_rw_bitmask = env->cpu_model->CP0_EBaseWG_rw_bitmask;
env->active_fpu.fcr0 = env->cpu_model->CP1_fcr0;
env->active_fpu.fcr31_rw_bitmask = env->cpu_model->CP1_fcr31_rw_bitmask;
env->active_fpu.fcr31 = env->cpu_model->CP1_fcr31;
env->msair = env->cpu_model->MSAIR;
env->insn_flags = env->cpu_model->insn_flags;
#if defined(CONFIG_USER_ONLY)
env->CP0_Status = (MIPS_HFLAG_UM << CP0St_KSU);
# ifdef TARGET_MIPS64
/* Enable 64-bit register mode. */
env->CP0_Status |= (1 << CP0St_PX);
# endif
# ifdef TARGET_ABI_MIPSN64
/* Enable 64-bit address mode. */
env->CP0_Status |= (1 << CP0St_UX);
# endif
/*
* Enable access to the CPUNum, SYNCI_Step, CC, and CCRes RDHWR
* hardware registers.
*/
env->CP0_HWREna |= 0x0000000F;
if (env->CP0_Config1 & (1 << CP0C1_FP)) {
env->CP0_Status |= (1 << CP0St_CU1);
}
if (env->CP0_Config3 & (1 << CP0C3_DSPP)) {
env->CP0_Status |= (1 << CP0St_MX);
}
# if defined(TARGET_MIPS64)
/* For MIPS64, init FR bit to 1 if FPU unit is there and bit is writable. */
if ((env->CP0_Config1 & (1 << CP0C1_FP)) &&
(env->CP0_Status_rw_bitmask & (1 << CP0St_FR))) {
env->CP0_Status |= (1 << CP0St_FR);
}
# endif
#else /* !CONFIG_USER_ONLY */
if (env->hflags & MIPS_HFLAG_BMASK) {
/*
* If the exception was raised from a delay slot,
* come back to the jump.
*/
env->CP0_ErrorEPC = (env->active_tc.PC
- (env->hflags & MIPS_HFLAG_B16 ? 2 : 4));
} else {
env->CP0_ErrorEPC = env->active_tc.PC;
}
env->active_tc.PC = env->exception_base;
env->CP0_Random = env->tlb->nb_tlb - 1;
env->tlb->tlb_in_use = env->tlb->nb_tlb;
env->CP0_Wired = 0;
env->CP0_GlobalNumber = (cs->cpu_index & 0xFF) << CP0GN_VPId;
env->CP0_EBase = KSEG0_BASE | (cs->cpu_index & 0x3FF);
if (env->CP0_Config3 & (1 << CP0C3_CMGCR)) {
env->CP0_CMGCRBase = 0x1fbf8000 >> 4;
}
env->CP0_EntryHi_ASID_mask = (env->CP0_Config5 & (1 << CP0C5_MI)) ?
0x0 : (env->CP0_Config4 & (1 << CP0C4_AE)) ? 0x3ff : 0xff;
env->CP0_Status = (1 << CP0St_BEV) | (1 << CP0St_ERL);
if (env->insn_flags & INSN_LOONGSON2F) {
/* Loongson-2F has those bits hardcoded to 1 */
env->CP0_Status |= (1 << CP0St_KX) | (1 << CP0St_SX) |
(1 << CP0St_UX);
}
/*
* Vectored interrupts not implemented, timer on int 7,
* no performance counters.
*/
env->CP0_IntCtl = 0xe0000000;
{
int i;
for (i = 0; i < 7; i++) {
env->CP0_WatchLo[i] = 0;
env->CP0_WatchHi[i] = 1 << CP0WH_M;
}
env->CP0_WatchLo[7] = 0;
env->CP0_WatchHi[7] = 0;
}
/* Count register increments in debug mode, EJTAG version 1 */
env->CP0_Debug = (1 << CP0DB_CNT) | (0x1 << CP0DB_VER);
cpu_mips_store_count(env, 1);
if (ase_mt_available(env)) {
int i;
/* Only TC0 on VPE 0 starts as active. */
for (i = 0; i < ARRAY_SIZE(env->tcs); i++) {
env->tcs[i].CP0_TCBind = cs->cpu_index << CP0TCBd_CurVPE;
env->tcs[i].CP0_TCHalt = 1;
}
env->active_tc.CP0_TCHalt = 1;
cs->halted = 1;
if (cs->cpu_index == 0) {
/* VPE0 starts up enabled. */
env->mvp->CP0_MVPControl |= (1 << CP0MVPCo_EVP);
env->CP0_VPEConf0 |= (1 << CP0VPEC0_MVP) | (1 << CP0VPEC0_VPA);
/* TC0 starts up unhalted. */
cs->halted = 0;
env->active_tc.CP0_TCHalt = 0;
env->tcs[0].CP0_TCHalt = 0;
/* With thread 0 active. */
env->active_tc.CP0_TCStatus = (1 << CP0TCSt_A);
env->tcs[0].CP0_TCStatus = (1 << CP0TCSt_A);
}
}
/*
* Configure default legacy segmentation control. We use this regardless of
* whether segmentation control is presented to the guest.
*/
/* KSeg3 (seg0 0xE0000000..0xFFFFFFFF) */
env->CP0_SegCtl0 = (CP0SC_AM_MK << CP0SC_AM);
/* KSeg2 (seg1 0xC0000000..0xDFFFFFFF) */
env->CP0_SegCtl0 |= ((CP0SC_AM_MSK << CP0SC_AM)) << 16;
/* KSeg1 (seg2 0xA0000000..0x9FFFFFFF) */
env->CP0_SegCtl1 = (0 << CP0SC_PA) | (CP0SC_AM_UK << CP0SC_AM) |
(2 << CP0SC_C);
/* KSeg0 (seg3 0x80000000..0x9FFFFFFF) */
env->CP0_SegCtl1 |= ((0 << CP0SC_PA) | (CP0SC_AM_UK << CP0SC_AM) |
(3 << CP0SC_C)) << 16;
/* USeg (seg4 0x40000000..0x7FFFFFFF) */
env->CP0_SegCtl2 = (2 << CP0SC_PA) | (CP0SC_AM_MUSK << CP0SC_AM) |
(1 << CP0SC_EU) | (2 << CP0SC_C);
/* USeg (seg5 0x00000000..0x3FFFFFFF) */
env->CP0_SegCtl2 |= ((0 << CP0SC_PA) | (CP0SC_AM_MUSK << CP0SC_AM) |
(1 << CP0SC_EU) | (2 << CP0SC_C)) << 16;
/* XKPhys (note, SegCtl2.XR = 0, so XAM won't be used) */
env->CP0_SegCtl1 |= (CP0SC_AM_UK << CP0SC1_XAM);
#endif /* !CONFIG_USER_ONLY */
if ((env->insn_flags & ISA_MIPS_R6) &&
(env->active_fpu.fcr0 & (1 << FCR0_F64))) {
/* Status.FR = 0 mode in 64-bit FPU not allowed in R6 */
env->CP0_Status |= (1 << CP0St_FR);
}
if (env->insn_flags & ISA_MIPS_R6) {
/* PTW = 1 */
env->CP0_PWSize = 0x40;
/* GDI = 12 */
/* UDI = 12 */
/* MDI = 12 */
/* PRI = 12 */
/* PTEI = 2 */
env->CP0_PWField = 0x0C30C302;
} else {
/* GDI = 0 */
/* UDI = 0 */
/* MDI = 0 */
/* PRI = 0 */
/* PTEI = 2 */
env->CP0_PWField = 0x02;
}
if (env->CP0_Config3 & (1 << CP0C3_ISA) & (1 << (CP0C3_ISA + 1))) {
/* microMIPS on reset when Config3.ISA is 3 */
env->hflags |= MIPS_HFLAG_M16;
}
msa_reset(env);
compute_hflags(env);
restore_fp_status(env);
restore_pamask(env);
cs->exception_index = EXCP_NONE;
if (semihosting_get_argc()) {
/* UHI interface can be used to obtain argc and argv */
env->active_tc.gpr[4] = -1;
}
#ifndef CONFIG_USER_ONLY
if (kvm_enabled()) {
kvm_mips_reset_vcpu(cpu);
}
#endif
}
static void mips_cpu_disas_set_info(CPUState *s, disassemble_info *info)
{
MIPSCPU *cpu = MIPS_CPU(s);
CPUMIPSState *env = &cpu->env;
if (!(env->insn_flags & ISA_NANOMIPS32)) {
#if TARGET_BIG_ENDIAN
info->print_insn = print_insn_big_mips;
#else
info->print_insn = print_insn_little_mips;
#endif
} else {
info->print_insn = print_insn_nanomips;
}
}
/*
* Since commit 6af0bf9c7c3 this model assumes a CPU clocked at 200MHz.
*/
#define CPU_FREQ_HZ_DEFAULT 200000000
static void mips_cp0_period_set(MIPSCPU *cpu)
{
CPUMIPSState *env = &cpu->env;
clock_set_mul_div(cpu->count_div, env->cpu_model->CCRes, 1);
clock_set_source(cpu->count_div, cpu->clock);
clock_set_source(env->count_clock, cpu->count_div);
}
static void mips_cpu_realizefn(DeviceState *dev, Error **errp)
{
CPUState *cs = CPU(dev);
MIPSCPU *cpu = MIPS_CPU(dev);
CPUMIPSState *env = &cpu->env;
MIPSCPUClass *mcc = MIPS_CPU_GET_CLASS(dev);
Error *local_err = NULL;
if (!clock_get(cpu->clock)) {
#ifndef CONFIG_USER_ONLY
if (!qtest_enabled()) {
g_autofree char *cpu_freq_str = freq_to_str(CPU_FREQ_HZ_DEFAULT);
warn_report("CPU input clock is not connected to any output clock, "
"using default frequency of %s.", cpu_freq_str);
}
#endif
/* Initialize the frequency in case the clock remains unconnected. */
clock_set_hz(cpu->clock, CPU_FREQ_HZ_DEFAULT);
}
mips_cp0_period_set(cpu);
cpu_exec_realizefn(cs, &local_err);
if (local_err != NULL) {
error_propagate(errp, local_err);
return;
}
env->exception_base = (int32_t)0xBFC00000;
#if defined(CONFIG_TCG) && !defined(CONFIG_USER_ONLY)
mmu_init(env, env->cpu_model);
#endif
fpu_init(env, env->cpu_model);
mvp_init(env);
cpu_reset(cs);
qemu_init_vcpu(cs);
mcc->parent_realize(dev, errp);
}
static void mips_cpu_initfn(Object *obj)
{
MIPSCPU *cpu = MIPS_CPU(obj);
CPUMIPSState *env = &cpu->env;
MIPSCPUClass *mcc = MIPS_CPU_GET_CLASS(obj);
cpu_set_cpustate_pointers(cpu);
cpu->clock = qdev_init_clock_in(DEVICE(obj), "clk-in", NULL, cpu, 0);
cpu->count_div = clock_new(OBJECT(obj), "clk-div-count");
env->count_clock = clock_new(OBJECT(obj), "clk-count");
env->cpu_model = mcc->cpu_def;
}
static char *mips_cpu_type_name(const char *cpu_model)
{
return g_strdup_printf(MIPS_CPU_TYPE_NAME("%s"), cpu_model);
}
static ObjectClass *mips_cpu_class_by_name(const char *cpu_model)
{
ObjectClass *oc;
char *typename;
typename = mips_cpu_type_name(cpu_model);
oc = object_class_by_name(typename);
g_free(typename);
return oc;
}
#ifndef CONFIG_USER_ONLY
#include "hw/core/sysemu-cpu-ops.h"
static const struct SysemuCPUOps mips_sysemu_ops = {
.get_phys_page_debug = mips_cpu_get_phys_page_debug,
.legacy_vmsd = &vmstate_mips_cpu,
};
#endif
#ifdef CONFIG_TCG
#include "hw/core/tcg-cpu-ops.h"
/*
* NB: cannot be const, as some elements are changed for specific
* mips hardware (see hw/mips/jazz.c).
*/
static const struct TCGCPUOps mips_tcg_ops = {
.initialize = mips_tcg_init,
.synchronize_from_tb = mips_cpu_synchronize_from_tb,
.restore_state_to_opc = mips_restore_state_to_opc,
#if !defined(CONFIG_USER_ONLY)
.tlb_fill = mips_cpu_tlb_fill,
.cpu_exec_interrupt = mips_cpu_exec_interrupt,
.do_interrupt = mips_cpu_do_interrupt,
.do_transaction_failed = mips_cpu_do_transaction_failed,
.do_unaligned_access = mips_cpu_do_unaligned_access,
.io_recompile_replay_branch = mips_io_recompile_replay_branch,
#endif /* !CONFIG_USER_ONLY */
};
#endif /* CONFIG_TCG */
static void mips_cpu_class_init(ObjectClass *c, void *data)
{
MIPSCPUClass *mcc = MIPS_CPU_CLASS(c);
CPUClass *cc = CPU_CLASS(c);
DeviceClass *dc = DEVICE_CLASS(c);
ResettableClass *rc = RESETTABLE_CLASS(c);
device_class_set_parent_realize(dc, mips_cpu_realizefn,
&mcc->parent_realize);
resettable_class_set_parent_phases(rc, NULL, mips_cpu_reset_hold, NULL,
&mcc->parent_phases);
cc->class_by_name = mips_cpu_class_by_name;
cc->has_work = mips_cpu_has_work;
cc->dump_state = mips_cpu_dump_state;
cc->set_pc = mips_cpu_set_pc;
cc->get_pc = mips_cpu_get_pc;
cc->gdb_read_register = mips_cpu_gdb_read_register;
cc->gdb_write_register = mips_cpu_gdb_write_register;
#ifndef CONFIG_USER_ONLY
cc->sysemu_ops = &mips_sysemu_ops;
#endif
cc->disas_set_info = mips_cpu_disas_set_info;
cc->gdb_num_core_regs = 73;
cc->gdb_stop_before_watchpoint = true;
#ifdef CONFIG_TCG
cc->tcg_ops = &mips_tcg_ops;
#endif /* CONFIG_TCG */
}
static const TypeInfo mips_cpu_type_info = {
.name = TYPE_MIPS_CPU,
.parent = TYPE_CPU,
.instance_size = sizeof(MIPSCPU),
.instance_init = mips_cpu_initfn,
.abstract = true,
.class_size = sizeof(MIPSCPUClass),
.class_init = mips_cpu_class_init,
};
static void mips_cpu_cpudef_class_init(ObjectClass *oc, void *data)
{
MIPSCPUClass *mcc = MIPS_CPU_CLASS(oc);
mcc->cpu_def = data;
}
static void mips_register_cpudef_type(const struct mips_def_t *def)
{
char *typename = mips_cpu_type_name(def->name);
TypeInfo ti = {
.name = typename,
.parent = TYPE_MIPS_CPU,
.class_init = mips_cpu_cpudef_class_init,
.class_data = (void *)def,
};
type_register(&ti);
g_free(typename);
}
static void mips_cpu_register_types(void)
{
int i;
type_register_static(&mips_cpu_type_info);
for (i = 0; i < mips_defs_number; i++) {
mips_register_cpudef_type(&mips_defs[i]);
}
}
type_init(mips_cpu_register_types)
/* Could be used by generic CPU object */
MIPSCPU *mips_cpu_create_with_clock(const char *cpu_type, Clock *cpu_refclk)
{
DeviceState *cpu;
cpu = DEVICE(object_new(cpu_type));
qdev_connect_clock_in(cpu, "clk-in", cpu_refclk);
qdev_realize(cpu, NULL, &error_abort);
return MIPS_CPU(cpu);
}
bool cpu_supports_isa(const CPUMIPSState *env, uint64_t isa_mask)
{
return (env->cpu_model->insn_flags & isa_mask) != 0;
}
bool cpu_type_supports_isa(const char *cpu_type, uint64_t isa)
{
const MIPSCPUClass *mcc = MIPS_CPU_CLASS(object_class_by_name(cpu_type));
return (mcc->cpu_def->insn_flags & isa) != 0;
}
bool cpu_type_supports_cps_smp(const char *cpu_type)
{
const MIPSCPUClass *mcc = MIPS_CPU_CLASS(object_class_by_name(cpu_type));
return (mcc->cpu_def->CP0_Config3 & (1 << CP0C3_CMGCR)) != 0;
}
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