[Qemu-devel] [PATCH v7 2/3] expose floppy drive geometry and CMOS type

[Igor Mammedov <imammedo@redhat.com>]

From: Roman Kagan <rkagan@virtuozzo.com>

Make it possible to query the geometry and the CMOS type of a floppy
drive outside of the respective source files.

It will be useful, in particular, when dynamically building ACPI tables,
and will allow to properly populate the corresponding ACPI objects and
thus enable BIOS-less systems to access the floppy drives.

Signed-off-by: Roman Kagan <rkagan@virtuozzo.com>
Signed-off-by: Igor Mammedov <imammedo@redhat.com>
Reviewed-by: John Snow <jsnow@redhat.com>
---
 hw/block/fdc.c         | 11 +++++++++++
 hw/i386/pc.c           |  2 +-
 include/hw/block/fdc.h |  2 ++
 include/hw/i386/pc.h   |  1 +
 4 files changed, 15 insertions(+), 1 deletion(-)

diff --git a/hw/block/fdc.c b/hw/block/fdc.c
index e3b0e1e..c9d7001 100644
--- a/hw/block/fdc.c
+++ b/hw/block/fdc.c
@@ -2518,6 +2518,17 @@ FloppyDriveType isa_fdc_get_drive_type(ISADevice *fdc, int i)
     return isa->state.drives[i].drive;
 }
 
+void isa_fdc_get_drive_geometry(ISADevice *fdc, int i, uint8_t *cylinders,
+                                uint8_t *heads, uint8_t *sectors)
+{
+    FDCtrlISABus *isa = ISA_FDC(fdc);
+    FDrive *drv = &isa->state.drives[i];
+
+    *cylinders = drv->max_track;
+    *heads = (drv->flags & FDISK_DBL_SIDES) ? 2 : 1;
+    *sectors = drv->last_sect;
+}
+
 static const VMStateDescription vmstate_isa_fdc ={
     .name = "fdc",
     .version_id = 2,
diff --git a/hw/i386/pc.c b/hw/i386/pc.c
index 78cf8fa..ccd7f39 100644
--- a/hw/i386/pc.c
+++ b/hw/i386/pc.c
@@ -199,7 +199,7 @@ static void pic_irq_request(void *opaque, int irq, int level)
 
 #define REG_EQUIPMENT_BYTE          0x14
 
-static int cmos_get_fd_drive_type(FloppyDriveType fd0)
+int cmos_get_fd_drive_type(FloppyDriveType fd0)
 {
     int val;
 
diff --git a/include/hw/block/fdc.h b/include/hw/block/fdc.h
index adce14f..d87859e 100644
--- a/include/hw/block/fdc.h
+++ b/include/hw/block/fdc.h
@@ -15,5 +15,7 @@ void sun4m_fdctrl_init(qemu_irq irq, hwaddr io_base,
                        DriveInfo **fds, qemu_irq *fdc_tc);
 
 FloppyDriveType isa_fdc_get_drive_type(ISADevice *fdc, int i);
+void isa_fdc_get_drive_geometry(ISADevice *fdc, int i, uint8_t *cylinders,
+                                uint8_t *heads, uint8_t *sectors);
 
 #endif
diff --git a/include/hw/i386/pc.h b/include/hw/i386/pc.h
index 65e8f24..ad59453 100644
--- a/include/hw/i386/pc.h
+++ b/include/hw/i386/pc.h
@@ -271,6 +271,7 @@ 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);
+int cmos_get_fd_drive_type(FloppyDriveType fd0);
 
 /* acpi_piix.c */
 
-- 
1.8.3.1