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i386/pc: expose identifying the floppy controller

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Factor out and expose the function to locate the floppy controller in
the system.
It will allow to dynamically populate the relevant objects in the ACPI
tables.

Signed-off-by: Roman Kagan <rkagan@virtuozzo.com>
Cc: "Michael S. Tsirkin" <mst@redhat.com>
Cc: Eduardo Habkost <ehabkost@redhat.com>
Cc: Igor Mammedov <imammedo@redhat.com>
Cc: John Snow <jsnow@redhat.com>
Cc: Kevin Wolf <kwolf@redhat.com>
Cc: Paolo Bonzini <pbonzini@redhat.com>
Cc: Richard Henderson <rth@twiddle.net>
Cc: qemu-block@nongnu.org
Cc: qemu-stable@nongnu.org
Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
This commit is contained in:
Roman Kagan 2015-12-30 23:11:51 +03:00 committed by Michael S. Tsirkin
parent 9fc6502606
commit 424e4a87d2
2 changed files with 28 additions and 18 deletions
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44
hw/i386/pc.c
View File

@ -360,6 +360,31 @@ static const char * const fdc_container_path[] = {
"/unattached", "/peripheral", "/peripheral-anon"
};
/*
* Locate the FDC at IO address 0x3f0, in order to configure the CMOS registers
* and ACPI objects.
*/
ISADevice *pc_find_fdc0(void)
{
int i;
Object *container;
CheckFdcState state = { 0 };
for (i = 0; i < ARRAY_SIZE(fdc_container_path); i++) {
container = container_get(qdev_get_machine(), fdc_container_path[i]);
object_child_foreach(container, check_fdc, &state);
}
if (state.multiple) {
error_report("warning: multiple floppy disk controllers with "
"iobase=0x3f0 have been found;\n"
"the one being picked for CMOS setup might not reflect "
"your intent");
}
return state.floppy;
}
static void pc_cmos_init_late(void *opaque)
{
pc_cmos_init_late_arg *arg = opaque;
@ -368,8 +393,6 @@ static void pc_cmos_init_late(void *opaque)
int8_t heads, sectors;
int val;
int i, trans;
Object *container;
CheckFdcState state = { 0 };
val = 0;
if (ide_get_geometry(arg->idebus[0], 0,
@ -399,22 +422,7 @@ static void pc_cmos_init_late(void *opaque)
}
rtc_set_memory(s, 0x39, val);
/*
* Locate the FDC at IO address 0x3f0, and configure the CMOS registers
* accordingly.
*/
for (i = 0; i < ARRAY_SIZE(fdc_container_path); i++) {
container = container_get(qdev_get_machine(), fdc_container_path[i]);
object_child_foreach(container, check_fdc, &state);
}
if (state.multiple) {
error_report("warning: multiple floppy disk controllers with "
"iobase=0x3f0 have been found;\n"
"the one being picked for CMOS setup might not reflect "
"your intent");
}
pc_cmos_init_floppy(s, state.floppy);
pc_cmos_init_floppy(s, pc_find_fdc0());
qemu_unregister_reset(pc_cmos_init_late, opaque);
}

2
include/hw/i386/pc.h
View File

@ -267,6 +267,8 @@ typedef void (*cpu_set_smm_t)(int smm, void *arg);
void ioapic_init_gsi(GSIState *gsi_state, const char *parent_name);
ISADevice *pc_find_fdc0(void);
/* acpi_piix.c */
I2CBus *piix4_pm_init(PCIBus *bus, int devfn, uint32_t smb_io_base,