From: Roman Kagan <[email protected]> When populating ACPI objects for floppy drives one needs to provide the maximum values for cylinder, sector, and head number the drive supports.
This patch adds a function that iterates through the array of predefined floppy drive formats and returns the maximum values of c, h, s, out of those matching the given floppy drive type. Signed-off-by: Roman Kagan <[email protected]> Cc: Igor Mammedov <[email protected]> Cc: "Michael S. Tsirkin" <[email protected]> Cc: Marcel Apfelbaum <[email protected]> Cc: John Snow <[email protected]> Cc: Laszlo Ersek <[email protected]> Cc: Kevin O'Connor <[email protected]> Reviewed-by: Michael S. Tsirkin <[email protected]> Signed-off-by: Michael S. Tsirkin <[email protected]> Reviewed-by: John Snow <[email protected]> --- include/hw/block/fdc.h | 2 ++ hw/block/fdc.c | 23 +++++++++++++++++++++++ 2 files changed, 25 insertions(+) diff --git a/include/hw/block/fdc.h b/include/hw/block/fdc.h index adce14f..1749dab 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_max_chs(FloppyDriveType type, + uint8_t *maxc, uint8_t *maxh, uint8_t *maxs); #endif diff --git a/hw/block/fdc.c b/hw/block/fdc.c index 9838d21..fc3aef9 100644 --- a/hw/block/fdc.c +++ b/hw/block/fdc.c @@ -2557,6 +2557,29 @@ FloppyDriveType isa_fdc_get_drive_type(ISADevice *fdc, int i) return isa->state.drives[i].drive; } +void isa_fdc_get_drive_max_chs(FloppyDriveType type, + uint8_t *maxc, uint8_t *maxh, uint8_t *maxs) +{ + const FDFormat *fdf; + + *maxc = *maxh = *maxs = 0; + for (fdf = fd_formats; fdf->drive != FLOPPY_DRIVE_TYPE_NONE; fdf++) { + if (fdf->drive != type) { + continue; + } + if (*maxc < fdf->max_track) { + *maxc = fdf->max_track; + } + if (*maxh < fdf->max_head) { + *maxh = fdf->max_head; + } + if (*maxs < fdf->last_sect) { + *maxs = fdf->last_sect; + } + } + (*maxc)--; +} + static const VMStateDescription vmstate_isa_fdc ={ .name = "fdc", .version_id = 2, -- MST
