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target/i386: move FERR handling to target/i386

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Move it out of pc.c since it is strictly tied to TCG.  This is
almost exclusively code movement, the next patch will implement
IGNNE.

Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
This commit is contained in:
Paolo Bonzini 2019-10-16 10:18:10 +02:00
parent 038adc2f58
commit 6f529b7534
6 changed files with 36 additions and 19 deletions
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17
hw/i386/pc.c
View File

@ -381,23 +381,12 @@ static uint64_t ioport80_read(void *opaque, hwaddr addr, unsigned size)
}
/* MSDOS compatibility mode FPU exception support */
static qemu_irq ferr_irq;
void pc_register_ferr_irq(qemu_irq irq)
{
ferr_irq = irq;
}
/* XXX: add IGNNE support */
void cpu_set_ferr(CPUX86State *s)
{
qemu_irq_raise(ferr_irq);
}
static void ioportF0_write(void *opaque, hwaddr addr, uint64_t data,
unsigned size)
{
qemu_irq_lower(ferr_irq);
if (tcg_enabled()) {
cpu_clear_ferr();
}
}
static uint64_t ioportF0_read(void *opaque, hwaddr addr, unsigned size)

4
hw/i386/pc_piix.c
View File

@ -213,7 +213,9 @@ static void pc_init1(MachineState *machine,
ioapic_init_gsi(gsi_state, "i440fx");
}
pc_register_ferr_irq(x86ms->gsi[13]);
if (tcg_enabled()) {
x86_register_ferr_irq(x86ms->gsi[13]);
}
pc_vga_init(isa_bus, pcmc->pci_enabled ? pci_bus : NULL);

4
hw/i386/pc_q35.c
View File

@ -261,7 +261,9 @@ static void pc_q35_init(MachineState *machine)
ioapic_init_gsi(gsi_state, "q35");
}
pc_register_ferr_irq(x86ms->gsi[13]);
if (tcg_enabled()) {
x86_register_ferr_irq(x86ms->gsi[13]);
}
assert(pcms->vmport != ON_OFF_AUTO__MAX);
if (pcms->vmport == ON_OFF_AUTO_AUTO) {

1
include/hw/i386/pc.h
View File

@ -176,7 +176,6 @@ void vmmouse_set_data(const uint32_t *data);
extern int fd_bootchk;
bool pc_machine_is_smm_enabled(PCMachineState *pcms);
void pc_register_ferr_irq(qemu_irq irq);
void pc_acpi_smi_interrupt(void *opaque, int irq, int level);
void pc_hot_add_cpu(MachineState *ms, const int64_t id, Error **errp);

3
target/i386/cpu.h
View File

@ -1761,7 +1761,8 @@ int cpu_x86_support_mca_broadcast(CPUX86State *env);
int cpu_get_pic_interrupt(CPUX86State *s);
/* MSDOS compatibility mode FPU exception support */
void cpu_set_ferr(CPUX86State *s);
void x86_register_ferr_irq(qemu_irq irq);
void cpu_clear_ferr(void);
/* mpx_helper.c */
void cpu_sync_bndcs_hflags(CPUX86State *env);

26
target/i386/fpu_helper.c
View File

@ -26,6 +26,10 @@
#include "exec/cpu_ldst.h"
#include "fpu/softfloat.h"
#ifdef CONFIG_SOFTMMU
#include "hw/irq.h"
#endif
#define FPU_RC_MASK 0xc00
#define FPU_RC_NEAR 0x000
#define FPU_RC_DOWN 0x400
@ -58,6 +62,26 @@
#define floatx80_l2e make_floatx80(0x3fff, 0xb8aa3b295c17f0bcLL)
#define floatx80_l2t make_floatx80(0x4000, 0xd49a784bcd1b8afeLL)
#if !defined(CONFIG_USER_ONLY)
static qemu_irq ferr_irq;
void x86_register_ferr_irq(qemu_irq irq)
{
ferr_irq = irq;
}
void cpu_clear_ferr(void)
{
qemu_irq_lower(ferr_irq);
}
static void cpu_set_ferr(void)
{
qemu_irq_raise(ferr_irq);
}
#endif
static inline void fpush(CPUX86State *env)
{
env->fpstt = (env->fpstt - 1) & 7;
@ -137,7 +161,7 @@ static void fpu_raise_exception(CPUX86State *env, uintptr_t retaddr)
}
#if !defined(CONFIG_USER_ONLY)
else {
cpu_set_ferr(env);
cpu_set_ferr();
}
#endif
}