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xemu/target/m68k/cpu.c
Peter Maydell e1aaf3a88e target/m68k: Switch to transaction_failed hook 
Switch the m68k target from the old unassigned_access hook
to the transaction_failed hook.

The notable difference is that rather than it being called
for all physical memory accesses which fail (including
those made by DMA devices or by the gdbstub), it is only
called for those made by the CPU via its MMU. (In previous
commits we put in explicit checks for the direct physical
loads made by the target/m68k code which will no longer
be handled by calling the unassigned_access hook.)

Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Message-Id: <20181210165636.28366-4-peter.maydell@linaro.org>
Signed-off-by: Laurent Vivier <laurent@vivier.eu>
2019-05-16 21:40:45 +02:00

315 lines
9.3 KiB
C
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/*
* QEMU Motorola 68k 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 "qapi/error.h"
#include "cpu.h"
#include "qemu-common.h"
#include "migration/vmstate.h"
#include "fpu/softfloat.h"
static void m68k_cpu_set_pc(CPUState *cs, vaddr value)
{
M68kCPU *cpu = M68K_CPU(cs);
cpu->env.pc = value;
}
static bool m68k_cpu_has_work(CPUState *cs)
{
return cs->interrupt_request & CPU_INTERRUPT_HARD;
}
static void m68k_set_feature(CPUM68KState *env, int feature)
{
env->features |= (1u << feature);
}
/* CPUClass::reset() */
static void m68k_cpu_reset(CPUState *s)
{
M68kCPU *cpu = M68K_CPU(s);
M68kCPUClass *mcc = M68K_CPU_GET_CLASS(cpu);
CPUM68KState *env = &cpu->env;
floatx80 nan = floatx80_default_nan(NULL);
int i;
mcc->parent_reset(s);
memset(env, 0, offsetof(CPUM68KState, end_reset_fields));
#ifdef CONFIG_SOFTMMU
cpu_m68k_set_sr(env, SR_S | SR_I);
#else
cpu_m68k_set_sr(env, 0);
#endif
for (i = 0; i < 8; i++) {
env->fregs[i].d = nan;
}
cpu_m68k_set_fpcr(env, 0);
env->fpsr = 0;
/* TODO: We should set PC from the interrupt vector. */
env->pc = 0;
}
static void m68k_cpu_disas_set_info(CPUState *s, disassemble_info *info)
{
M68kCPU *cpu = M68K_CPU(s);
CPUM68KState *env = &cpu->env;
info->print_insn = print_insn_m68k;
if (m68k_feature(env, M68K_FEATURE_M68000)) {
info->mach = bfd_mach_m68040;
}
}
/* CPU models */
static ObjectClass *m68k_cpu_class_by_name(const char *cpu_model)
{
ObjectClass *oc;
char *typename;
typename = g_strdup_printf(M68K_CPU_TYPE_NAME("%s"), cpu_model);
oc = object_class_by_name(typename);
g_free(typename);
if (oc != NULL && (object_class_dynamic_cast(oc, TYPE_M68K_CPU) == NULL ||
object_class_is_abstract(oc))) {
return NULL;
}
return oc;
}
static void m5206_cpu_initfn(Object *obj)
{
M68kCPU *cpu = M68K_CPU(obj);
CPUM68KState *env = &cpu->env;
m68k_set_feature(env, M68K_FEATURE_CF_ISA_A);
}
static void m68000_cpu_initfn(Object *obj)
{
M68kCPU *cpu = M68K_CPU(obj);
CPUM68KState *env = &cpu->env;
m68k_set_feature(env, M68K_FEATURE_M68000);
m68k_set_feature(env, M68K_FEATURE_USP);
m68k_set_feature(env, M68K_FEATURE_WORD_INDEX);
m68k_set_feature(env, M68K_FEATURE_MOVEP);
}
static void m68020_cpu_initfn(Object *obj)
{
M68kCPU *cpu = M68K_CPU(obj);
CPUM68KState *env = &cpu->env;
m68k_set_feature(env, M68K_FEATURE_M68000);
m68k_set_feature(env, M68K_FEATURE_USP);
m68k_set_feature(env, M68K_FEATURE_WORD_INDEX);
m68k_set_feature(env, M68K_FEATURE_QUAD_MULDIV);
m68k_set_feature(env, M68K_FEATURE_BRAL);
m68k_set_feature(env, M68K_FEATURE_BCCL);
m68k_set_feature(env, M68K_FEATURE_BITFIELD);
m68k_set_feature(env, M68K_FEATURE_EXT_FULL);
m68k_set_feature(env, M68K_FEATURE_SCALED_INDEX);
m68k_set_feature(env, M68K_FEATURE_LONG_MULDIV);
m68k_set_feature(env, M68K_FEATURE_FPU);
m68k_set_feature(env, M68K_FEATURE_CAS);
m68k_set_feature(env, M68K_FEATURE_BKPT);
m68k_set_feature(env, M68K_FEATURE_RTD);
m68k_set_feature(env, M68K_FEATURE_CHK2);
m68k_set_feature(env, M68K_FEATURE_MOVEP);
}
#define m68030_cpu_initfn m68020_cpu_initfn
static void m68040_cpu_initfn(Object *obj)
{
M68kCPU *cpu = M68K_CPU(obj);
CPUM68KState *env = &cpu->env;
m68020_cpu_initfn(obj);
m68k_set_feature(env, M68K_FEATURE_M68040);
}
static void m68060_cpu_initfn(Object *obj)
{
M68kCPU *cpu = M68K_CPU(obj);
CPUM68KState *env = &cpu->env;
m68k_set_feature(env, M68K_FEATURE_M68000);
m68k_set_feature(env, M68K_FEATURE_USP);
m68k_set_feature(env, M68K_FEATURE_WORD_INDEX);
m68k_set_feature(env, M68K_FEATURE_BRAL);
m68k_set_feature(env, M68K_FEATURE_BCCL);
m68k_set_feature(env, M68K_FEATURE_BITFIELD);
m68k_set_feature(env, M68K_FEATURE_EXT_FULL);
m68k_set_feature(env, M68K_FEATURE_SCALED_INDEX);
m68k_set_feature(env, M68K_FEATURE_LONG_MULDIV);
m68k_set_feature(env, M68K_FEATURE_FPU);
m68k_set_feature(env, M68K_FEATURE_CAS);
m68k_set_feature(env, M68K_FEATURE_BKPT);
m68k_set_feature(env, M68K_FEATURE_RTD);
m68k_set_feature(env, M68K_FEATURE_CHK2);
}
static void m5208_cpu_initfn(Object *obj)
{
M68kCPU *cpu = M68K_CPU(obj);
CPUM68KState *env = &cpu->env;
m68k_set_feature(env, M68K_FEATURE_CF_ISA_A);
m68k_set_feature(env, M68K_FEATURE_CF_ISA_APLUSC);
m68k_set_feature(env, M68K_FEATURE_BRAL);
m68k_set_feature(env, M68K_FEATURE_CF_EMAC);
m68k_set_feature(env, M68K_FEATURE_USP);
}
static void cfv4e_cpu_initfn(Object *obj)
{
M68kCPU *cpu = M68K_CPU(obj);
CPUM68KState *env = &cpu->env;
m68k_set_feature(env, M68K_FEATURE_CF_ISA_A);
m68k_set_feature(env, M68K_FEATURE_CF_ISA_B);
m68k_set_feature(env, M68K_FEATURE_BRAL);
m68k_set_feature(env, M68K_FEATURE_CF_FPU);
m68k_set_feature(env, M68K_FEATURE_CF_EMAC);
m68k_set_feature(env, M68K_FEATURE_USP);
}
static void any_cpu_initfn(Object *obj)
{
M68kCPU *cpu = M68K_CPU(obj);
CPUM68KState *env = &cpu->env;
m68k_set_feature(env, M68K_FEATURE_CF_ISA_A);
m68k_set_feature(env, M68K_FEATURE_CF_ISA_B);
m68k_set_feature(env, M68K_FEATURE_CF_ISA_APLUSC);
m68k_set_feature(env, M68K_FEATURE_BRAL);
m68k_set_feature(env, M68K_FEATURE_CF_FPU);
/* MAC and EMAC are mututally exclusive, so pick EMAC.
It's mostly backwards compatible. */
m68k_set_feature(env, M68K_FEATURE_CF_EMAC);
m68k_set_feature(env, M68K_FEATURE_CF_EMAC_B);
m68k_set_feature(env, M68K_FEATURE_USP);
m68k_set_feature(env, M68K_FEATURE_EXT_FULL);
m68k_set_feature(env, M68K_FEATURE_WORD_INDEX);
}
static void m68k_cpu_realizefn(DeviceState *dev, Error **errp)
{
CPUState *cs = CPU(dev);
M68kCPU *cpu = M68K_CPU(dev);
M68kCPUClass *mcc = M68K_CPU_GET_CLASS(dev);
Error *local_err = NULL;
register_m68k_insns(&cpu->env);
cpu_exec_realizefn(cs, &local_err);
if (local_err != NULL) {
error_propagate(errp, local_err);
return;
}
m68k_cpu_init_gdb(cpu);
cpu_reset(cs);
qemu_init_vcpu(cs);
mcc->parent_realize(dev, errp);
}
static void m68k_cpu_initfn(Object *obj)
{
CPUState *cs = CPU(obj);
M68kCPU *cpu = M68K_CPU(obj);
CPUM68KState *env = &cpu->env;
cs->env_ptr = env;
}
static const VMStateDescription vmstate_m68k_cpu = {
.name = "cpu",
.unmigratable = 1,
};
static void m68k_cpu_class_init(ObjectClass *c, void *data)
{
M68kCPUClass *mcc = M68K_CPU_CLASS(c);
CPUClass *cc = CPU_CLASS(c);
DeviceClass *dc = DEVICE_CLASS(c);
device_class_set_parent_realize(dc, m68k_cpu_realizefn,
&mcc->parent_realize);
mcc->parent_reset = cc->reset;
cc->reset = m68k_cpu_reset;
cc->class_by_name = m68k_cpu_class_by_name;
cc->has_work = m68k_cpu_has_work;
cc->do_interrupt = m68k_cpu_do_interrupt;
cc->cpu_exec_interrupt = m68k_cpu_exec_interrupt;
cc->dump_state = m68k_cpu_dump_state;
cc->set_pc = m68k_cpu_set_pc;
cc->gdb_read_register = m68k_cpu_gdb_read_register;
cc->gdb_write_register = m68k_cpu_gdb_write_register;
cc->handle_mmu_fault = m68k_cpu_handle_mmu_fault;
#if defined(CONFIG_SOFTMMU)
cc->do_transaction_failed = m68k_cpu_transaction_failed;
cc->get_phys_page_debug = m68k_cpu_get_phys_page_debug;
#endif
cc->disas_set_info = m68k_cpu_disas_set_info;
cc->tcg_initialize = m68k_tcg_init;
cc->gdb_num_core_regs = 18;
cc->gdb_core_xml_file = "cf-core.xml";
dc->vmsd = &vmstate_m68k_cpu;
}
#define DEFINE_M68K_CPU_TYPE(cpu_model, initfn) \
{ \
.name = M68K_CPU_TYPE_NAME(cpu_model), \
.instance_init = initfn, \
.parent = TYPE_M68K_CPU, \
}
static const TypeInfo m68k_cpus_type_infos[] = {
{ /* base class should be registered first */
.name = TYPE_M68K_CPU,
.parent = TYPE_CPU,
.instance_size = sizeof(M68kCPU),
.instance_init = m68k_cpu_initfn,
.abstract = true,
.class_size = sizeof(M68kCPUClass),
.class_init = m68k_cpu_class_init,
},
DEFINE_M68K_CPU_TYPE("m68000", m68000_cpu_initfn),
DEFINE_M68K_CPU_TYPE("m68020", m68020_cpu_initfn),
DEFINE_M68K_CPU_TYPE("m68030", m68030_cpu_initfn),
DEFINE_M68K_CPU_TYPE("m68040", m68040_cpu_initfn),
DEFINE_M68K_CPU_TYPE("m68060", m68060_cpu_initfn),
DEFINE_M68K_CPU_TYPE("m5206", m5206_cpu_initfn),
DEFINE_M68K_CPU_TYPE("m5208", m5208_cpu_initfn),
DEFINE_M68K_CPU_TYPE("cfv4e", cfv4e_cpu_initfn),
DEFINE_M68K_CPU_TYPE("any", any_cpu_initfn),
};
DEFINE_TYPES(m68k_cpus_type_infos)
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