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qemu/target/microblaze/cpu.c

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/*
* QEMU MicroBlaze CPU
*
* Copyright (c) 2009 Edgar E. Iglesias
* Copyright (c) 2009-2012 PetaLogix Qld Pty Ltd.
* Copyright (c) 2012 SUSE LINUX Products GmbH
* Copyright (c) 2009 Edgar E. Iglesias, Axis Communications AB.
*
* 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 "qapi/error.h"
#include "cpu.h"
#include "qemu/module.h"
#include "hw/qdev-properties.h"
#include "exec/exec-all.h"
#include "fpu/softfloat-helpers.h"
static const struct {
const char *name;
uint8_t version_id;
} mb_cpu_lookup[] = {
/* These key value are as per MBV field in PVR0 */
{"5.00.a", 0x01},
{"5.00.b", 0x02},
{"5.00.c", 0x03},
{"6.00.a", 0x04},
{"6.00.b", 0x06},
{"7.00.a", 0x05},
{"7.00.b", 0x07},
{"7.10.a", 0x08},
{"7.10.b", 0x09},
{"7.10.c", 0x0a},
{"7.10.d", 0x0b},
{"7.20.a", 0x0c},
{"7.20.b", 0x0d},
{"7.20.c", 0x0e},
{"7.20.d", 0x0f},
{"7.30.a", 0x10},
{"7.30.b", 0x11},
{"8.00.a", 0x12},
{"8.00.b", 0x13},
{"8.10.a", 0x14},
{"8.20.a", 0x15},
{"8.20.b", 0x16},
{"8.30.a", 0x17},
{"8.40.a", 0x18},
{"8.40.b", 0x19},
{"8.50.a", 0x1A},
{"9.0", 0x1B},
{"9.1", 0x1D},
{"9.2", 0x1F},
{"9.3", 0x20},
{"9.4", 0x21},
{"9.5", 0x22},
{"9.6", 0x23},
{"10.0", 0x24},
{NULL, 0},
};
/* If no specific version gets selected, default to the following. */
#define DEFAULT_CPU_VERSION "10.0"
static void mb_cpu_set_pc(CPUState *cs, vaddr value)
{
MicroBlazeCPU *cpu = MICROBLAZE_CPU(cs);
cpu->env.pc = value;
/* Ensure D_FLAG and IMM_FLAG are clear for the new PC */
cpu->env.iflags = 0;
}
static void mb_cpu_synchronize_from_tb(CPUState *cs, TranslationBlock *tb)
{
MicroBlazeCPU *cpu = MICROBLAZE_CPU(cs);
cpu->env.pc = tb->pc;
cpu->env.iflags = tb->flags & IFLAGS_TB_MASK;
}
static bool mb_cpu_has_work(CPUState *cs)
{
return cs->interrupt_request & (CPU_INTERRUPT_HARD | CPU_INTERRUPT_NMI);
}
#ifndef CONFIG_USER_ONLY
static void microblaze_cpu_set_irq(void *opaque, int irq, int level)
{
MicroBlazeCPU *cpu = opaque;
CPUState *cs = CPU(cpu);
int type = irq ? CPU_INTERRUPT_NMI : CPU_INTERRUPT_HARD;
if (level) {
cpu_interrupt(cs, type);
} else {
cpu_reset_interrupt(cs, type);
}
}
#endif
static void mb_cpu_reset(DeviceState *dev)
{
CPUState *s = CPU(dev);
MicroBlazeCPU *cpu = MICROBLAZE_CPU(s);
MicroBlazeCPUClass *mcc = MICROBLAZE_CPU_GET_CLASS(cpu);
CPUMBState *env = &cpu->env;
mcc->parent_reset(dev);
memset(env, 0, offsetof(CPUMBState, end_reset_fields));
env->res_addr = RES_ADDR_NONE;
/* Disable stack protector. */
env->shr = ~0;
env->pc = cpu->cfg.base_vectors;
#if defined(CONFIG_USER_ONLY)
/* start in user mode with interrupts enabled. */
mb_cpu_write_msr(env, MSR_EE | MSR_IE | MSR_VM | MSR_UM);
#else
mb_cpu_write_msr(env, 0);
mmu_init(&env->mmu);
#endif
}
static void mb_disas_set_info(CPUState *cpu, disassemble_info *info)
{
info->mach = bfd_arch_microblaze;
info->print_insn = print_insn_microblaze;
}
static void mb_cpu_realizefn(DeviceState *dev, Error **errp)
{
CPUState *cs = CPU(dev);
MicroBlazeCPUClass *mcc = MICROBLAZE_CPU_GET_CLASS(dev);
MicroBlazeCPU *cpu = MICROBLAZE_CPU(cs);
uint8_t version_code = 0;
const char *version;
int i = 0;
Error *local_err = NULL;
cpu_exec_realizefn(cs, &local_err);
if (local_err != NULL) {
error_propagate(errp, local_err);
return;
}
if (cpu->cfg.addr_size < 32 || cpu->cfg.addr_size > 64) {
error_setg(errp, "addr-size %d is out of range (32 - 64)",
cpu->cfg.addr_size);
return;
}
qemu_init_vcpu(cs);
version = cpu->cfg.version ? cpu->cfg.version : DEFAULT_CPU_VERSION;
for (i = 0; mb_cpu_lookup[i].name && version; i++) {
if (strcmp(mb_cpu_lookup[i].name, version) == 0) {
version_code = mb_cpu_lookup[i].version_id;
break;
}
}
if (!version_code) {
qemu_log("Invalid MicroBlaze version number: %s\n", cpu->cfg.version);
}
cpu->cfg.pvr_regs[0] =
(PVR0_USE_EXC_MASK |
PVR0_USE_ICACHE_MASK |
PVR0_USE_DCACHE_MASK |
(cpu->cfg.stackprot ? PVR0_SPROT_MASK : 0) |
(cpu->cfg.use_fpu ? PVR0_USE_FPU_MASK : 0) |
(cpu->cfg.use_hw_mul ? PVR0_USE_HW_MUL_MASK : 0) |
(cpu->cfg.use_barrel ? PVR0_USE_BARREL_MASK : 0) |
(cpu->cfg.use_div ? PVR0_USE_DIV_MASK : 0) |
(cpu->cfg.use_mmu ? PVR0_USE_MMU_MASK : 0) |
(cpu->cfg.endi ? PVR0_ENDI_MASK : 0) |
(version_code << PVR0_VERSION_SHIFT) |
(cpu->cfg.pvr == C_PVR_FULL ? PVR0_PVR_FULL_MASK : 0) |
cpu->cfg.pvr_user1);
cpu->cfg.pvr_regs[1] = cpu->cfg.pvr_user2;
cpu->cfg.pvr_regs[2] =
(PVR2_D_OPB_MASK |
PVR2_D_LMB_MASK |
PVR2_I_OPB_MASK |
PVR2_I_LMB_MASK |
PVR2_FPU_EXC_MASK |
(cpu->cfg.use_fpu ? PVR2_USE_FPU_MASK : 0) |
(cpu->cfg.use_fpu > 1 ? PVR2_USE_FPU2_MASK : 0) |
(cpu->cfg.use_hw_mul ? PVR2_USE_HW_MUL_MASK : 0) |
(cpu->cfg.use_hw_mul > 1 ? PVR2_USE_MUL64_MASK : 0) |
(cpu->cfg.use_barrel ? PVR2_USE_BARREL_MASK : 0) |
(cpu->cfg.use_div ? PVR2_USE_DIV_MASK : 0) |
(cpu->cfg.use_msr_instr ? PVR2_USE_MSR_INSTR : 0) |
(cpu->cfg.use_pcmp_instr ? PVR2_USE_PCMP_INSTR : 0) |
(cpu->cfg.dopb_bus_exception ? PVR2_DOPB_BUS_EXC_MASK : 0) |
(cpu->cfg.iopb_bus_exception ? PVR2_IOPB_BUS_EXC_MASK : 0) |
(cpu->cfg.div_zero_exception ? PVR2_DIV_ZERO_EXC_MASK : 0) |
(cpu->cfg.illegal_opcode_exception ? PVR2_ILL_OPCODE_EXC_MASK : 0) |
(cpu->cfg.unaligned_exceptions ? PVR2_UNALIGNED_EXC_MASK : 0) |
(cpu->cfg.opcode_0_illegal ? PVR2_OPCODE_0x0_ILL_MASK : 0));
cpu->cfg.pvr_regs[5] |=
cpu->cfg.dcache_writeback ? PVR5_DCACHE_WRITEBACK_MASK : 0;
cpu->cfg.pvr_regs[10] =
(0x0c000000 | /* Default to spartan 3a dsp family. */
(cpu->cfg.addr_size - 32) << PVR10_ASIZE_SHIFT);
cpu->cfg.pvr_regs[11] = ((cpu->cfg.use_mmu ? PVR11_USE_MMU : 0) |
16 << 17);
cpu->cfg.mmu = 3;
cpu->cfg.mmu_tlb_access = 3;
cpu->cfg.mmu_zones = 16;
cpu->cfg.addr_mask = MAKE_64BIT_MASK(0, cpu->cfg.addr_size);
mcc->parent_realize(dev, errp);
}
static void mb_cpu_initfn(Object *obj)
{
MicroBlazeCPU *cpu = MICROBLAZE_CPU(obj);
CPUMBState *env = &cpu->env;
cpu_set_cpustate_pointers(cpu);
set_float_rounding_mode(float_round_nearest_even, &env->fp_status);
#ifndef CONFIG_USER_ONLY
/* Inbound IRQ and FIR lines */
qdev_init_gpio_in(DEVICE(cpu), microblaze_cpu_set_irq, 2);
#endif
}
static Property mb_properties[] = {
DEFINE_PROP_UINT32("base-vectors", MicroBlazeCPU, cfg.base_vectors, 0),
DEFINE_PROP_BOOL("use-stack-protection", MicroBlazeCPU, cfg.stackprot,
false),
/*
* This is the C_ADDR_SIZE synth-time configuration option of the
* MicroBlaze cores. Supported values range between 32 and 64.
*
* When set to > 32, 32bit MicroBlaze can emit load/stores
* with extended addressing.
*/
DEFINE_PROP_UINT8("addr-size", MicroBlazeCPU, cfg.addr_size, 32),
/* If use-fpu > 0 - FPU is enabled
* If use-fpu = 2 - Floating point conversion and square root instructions
* are enabled
*/
DEFINE_PROP_UINT8("use-fpu", MicroBlazeCPU, cfg.use_fpu, 2),
/* If use-hw-mul > 0 - Multiplier is enabled
* If use-hw-mul = 2 - 64-bit multiplier is enabled
*/
DEFINE_PROP_UINT8("use-hw-mul", MicroBlazeCPU, cfg.use_hw_mul, 2),
DEFINE_PROP_BOOL("use-barrel", MicroBlazeCPU, cfg.use_barrel, true),
DEFINE_PROP_BOOL("use-div", MicroBlazeCPU, cfg.use_div, true),
DEFINE_PROP_BOOL("use-msr-instr", MicroBlazeCPU, cfg.use_msr_instr, true),
DEFINE_PROP_BOOL("use-pcmp-instr", MicroBlazeCPU, cfg.use_pcmp_instr, true),
DEFINE_PROP_BOOL("use-mmu", MicroBlazeCPU, cfg.use_mmu, true),
DEFINE_PROP_BOOL("dcache-writeback", MicroBlazeCPU, cfg.dcache_writeback,
false),
DEFINE_PROP_BOOL("endianness", MicroBlazeCPU, cfg.endi, false),
/* Enables bus exceptions on failed data accesses (load/stores). */
DEFINE_PROP_BOOL("dopb-bus-exception", MicroBlazeCPU,
cfg.dopb_bus_exception, false),
/* Enables bus exceptions on failed instruction fetches. */
DEFINE_PROP_BOOL("iopb-bus-exception", MicroBlazeCPU,
cfg.iopb_bus_exception, false),
DEFINE_PROP_BOOL("ill-opcode-exception", MicroBlazeCPU,
cfg.illegal_opcode_exception, false),
DEFINE_PROP_BOOL("div-zero-exception", MicroBlazeCPU,
cfg.div_zero_exception, false),
DEFINE_PROP_BOOL("unaligned-exceptions", MicroBlazeCPU,
cfg.unaligned_exceptions, false),
DEFINE_PROP_BOOL("opcode-0x0-illegal", MicroBlazeCPU,
cfg.opcode_0_illegal, false),
DEFINE_PROP_STRING("version", MicroBlazeCPU, cfg.version),
DEFINE_PROP_UINT8("pvr", MicroBlazeCPU, cfg.pvr, C_PVR_FULL),
DEFINE_PROP_UINT8("pvr-user1", MicroBlazeCPU, cfg.pvr_user1, 0),
DEFINE_PROP_UINT32("pvr-user2", MicroBlazeCPU, cfg.pvr_user2, 0),
DEFINE_PROP_END_OF_LIST(),
};
static ObjectClass *mb_cpu_class_by_name(const char *cpu_model)
{
return object_class_by_name(TYPE_MICROBLAZE_CPU);
}
static void mb_cpu_class_init(ObjectClass *oc, void *data)
{
DeviceClass *dc = DEVICE_CLASS(oc);
CPUClass *cc = CPU_CLASS(oc);
MicroBlazeCPUClass *mcc = MICROBLAZE_CPU_CLASS(oc);
device_class_set_parent_realize(dc, mb_cpu_realizefn,
&mcc->parent_realize);
device_class_set_parent_reset(dc, mb_cpu_reset, &mcc->parent_reset);
cc->class_by_name = mb_cpu_class_by_name;
cc->has_work = mb_cpu_has_work;
cc->do_interrupt = mb_cpu_do_interrupt;
cc->do_unaligned_access = mb_cpu_do_unaligned_access;
cc->cpu_exec_interrupt = mb_cpu_exec_interrupt;
cc->dump_state = mb_cpu_dump_state;
cc->set_pc = mb_cpu_set_pc;
cc->synchronize_from_tb = mb_cpu_synchronize_from_tb;
cc->gdb_read_register = mb_cpu_gdb_read_register;
cc->gdb_write_register = mb_cpu_gdb_write_register;
cc->tlb_fill = mb_cpu_tlb_fill;
#ifndef CONFIG_USER_ONLY
cc->do_transaction_failed = mb_cpu_transaction_failed;
cc->get_phys_page_debug = mb_cpu_get_phys_page_debug;
dc->vmsd = &vmstate_mb_cpu;
#endif
device_class_set_props(dc, mb_properties);
cc->gdb_num_core_regs = 32 + 27;
cc->disas_set_info = mb_disas_set_info;
cc->tcg_initialize = mb_tcg_init;
}
static const TypeInfo mb_cpu_type_info = {
.name = TYPE_MICROBLAZE_CPU,
.parent = TYPE_CPU,
.instance_size = sizeof(MicroBlazeCPU),
.instance_init = mb_cpu_initfn,
.class_size = sizeof(MicroBlazeCPUClass),
.class_init = mb_cpu_class_init,
};
static void mb_cpu_register_types(void)
{
type_register_static(&mb_cpu_type_info);
}
type_init(mb_cpu_register_types)
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