diff mbox series

[v5,08/15] acpi: move aml builder code for floppy device

Message ID 20200507131640.14041-9-kraxel@redhat.com (mailing list archive)
State New, archived
Headers show
Series acpi: i386 tweaks | expand

Commit Message

Gerd Hoffmann May 7, 2020, 1:16 p.m. UTC
Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>
Reviewed-by: Igor Mammedov <imammedo@redhat.com>
---
 hw/block/fdc.c       | 83 ++++++++++++++++++++++++++++++++++++++++++++
 hw/i386/acpi-build.c | 83 --------------------------------------------
 stubs/cmos.c         |  7 ++++
 stubs/Makefile.objs  |  1 +
 4 files changed, 91 insertions(+), 83 deletions(-)
 create mode 100644 stubs/cmos.c

Comments

Philippe Mathieu-Daudé May 7, 2020, 2:05 p.m. UTC | #1
+Hervé

On 5/7/20 3:16 PM, Gerd Hoffmann wrote:
> Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>
> Reviewed-by: Igor Mammedov <imammedo@redhat.com>
> ---
>   hw/block/fdc.c       | 83 ++++++++++++++++++++++++++++++++++++++++++++
>   hw/i386/acpi-build.c | 83 --------------------------------------------
>   stubs/cmos.c         |  7 ++++
>   stubs/Makefile.objs  |  1 +
>   4 files changed, 91 insertions(+), 83 deletions(-)
>   create mode 100644 stubs/cmos.c
> 
> diff --git a/hw/block/fdc.c b/hw/block/fdc.c
> index 9628cc171ef8..40faa088b5f7 100644
> --- a/hw/block/fdc.c
> +++ b/hw/block/fdc.c
> @@ -32,6 +32,8 @@
>   #include "qapi/error.h"
>   #include "qemu/error-report.h"
>   #include "qemu/timer.h"
> +#include "hw/i386/pc.h"

I'd rather not see this target-specific header used in the generic 
device model... The culprit seems cmos_get_fd_drive_type(). Is the value 
really PC specific?

Hervé, do you know if such info & RTC nvram layout is used in other arch?

> +#include "hw/acpi/aml-build.h"
>   #include "hw/irq.h"
>   #include "hw/isa/isa.h"
>   #include "hw/qdev-properties.h"
> @@ -2765,6 +2767,85 @@ void isa_fdc_get_drive_max_chs(FloppyDriveType type,
>       (*maxc)--;
>   }
>   
> +static Aml *build_fdinfo_aml(int idx, FloppyDriveType type)
> +{
> +    Aml *dev, *fdi;
> +    uint8_t maxc, maxh, maxs;
> +
> +    isa_fdc_get_drive_max_chs(type, &maxc, &maxh, &maxs);
> +
> +    dev = aml_device("FLP%c", 'A' + idx);
> +
> +    aml_append(dev, aml_name_decl("_ADR", aml_int(idx)));
> +
> +    fdi = aml_package(16);
> +    aml_append(fdi, aml_int(idx));  /* Drive Number */
> +    aml_append(fdi,
> +        aml_int(cmos_get_fd_drive_type(type)));  /* Device Type */
> +    /*
> +     * the values below are the limits of the drive, and are thus independent
> +     * of the inserted media
> +     */
> +    aml_append(fdi, aml_int(maxc));  /* Maximum Cylinder Number */
> +    aml_append(fdi, aml_int(maxs));  /* Maximum Sector Number */
> +    aml_append(fdi, aml_int(maxh));  /* Maximum Head Number */
> +    /*
> +     * SeaBIOS returns the below values for int 0x13 func 0x08 regardless of
> +     * the drive type, so shall we
> +     */
> +    aml_append(fdi, aml_int(0xAF));  /* disk_specify_1 */
> +    aml_append(fdi, aml_int(0x02));  /* disk_specify_2 */
> +    aml_append(fdi, aml_int(0x25));  /* disk_motor_wait */
> +    aml_append(fdi, aml_int(0x02));  /* disk_sector_siz */
> +    aml_append(fdi, aml_int(0x12));  /* disk_eot */
> +    aml_append(fdi, aml_int(0x1B));  /* disk_rw_gap */
> +    aml_append(fdi, aml_int(0xFF));  /* disk_dtl */
> +    aml_append(fdi, aml_int(0x6C));  /* disk_formt_gap */
> +    aml_append(fdi, aml_int(0xF6));  /* disk_fill */
> +    aml_append(fdi, aml_int(0x0F));  /* disk_head_sttl */
> +    aml_append(fdi, aml_int(0x08));  /* disk_motor_strt */
> +
> +    aml_append(dev, aml_name_decl("_FDI", fdi));
> +    return dev;
> +}
> +
> +static void fdc_isa_build_aml(ISADevice *isadev, Aml *scope)
> +{
> +    Aml *dev;
> +    Aml *crs;
> +    int i;
> +
> +#define ACPI_FDE_MAX_FD 4
> +    uint32_t fde_buf[5] = {
> +        0, 0, 0, 0,     /* presence of floppy drives #0 - #3 */
> +        cpu_to_le32(2)  /* tape presence (2 == never present) */
> +    };
> +
> +    crs = aml_resource_template();
> +    aml_append(crs, aml_io(AML_DECODE16, 0x03F2, 0x03F2, 0x00, 0x04));
> +    aml_append(crs, aml_io(AML_DECODE16, 0x03F7, 0x03F7, 0x00, 0x01));
> +    aml_append(crs, aml_irq_no_flags(6));
> +    aml_append(crs,
> +        aml_dma(AML_COMPATIBILITY, AML_NOTBUSMASTER, AML_TRANSFER8, 2));
> +
> +    dev = aml_device("FDC0");
> +    aml_append(dev, aml_name_decl("_HID", aml_eisaid("PNP0700")));
> +    aml_append(dev, aml_name_decl("_CRS", crs));
> +
> +    for (i = 0; i < MIN(MAX_FD, ACPI_FDE_MAX_FD); i++) {
> +        FloppyDriveType type = isa_fdc_get_drive_type(isadev, i);
> +
> +        if (type < FLOPPY_DRIVE_TYPE_NONE) {
> +            fde_buf[i] = cpu_to_le32(1);  /* drive present */
> +            aml_append(dev, build_fdinfo_aml(i, type));
> +        }
> +    }
> +    aml_append(dev, aml_name_decl("_FDE",
> +               aml_buffer(sizeof(fde_buf), (uint8_t *)fde_buf)));
> +
> +    aml_append(scope, dev);
> +}
> +
>   static const VMStateDescription vmstate_isa_fdc ={
>       .name = "fdc",
>       .version_id = 2,
> @@ -2798,11 +2879,13 @@ static Property isa_fdc_properties[] = {
>   static void isabus_fdc_class_init(ObjectClass *klass, void *data)
>   {
>       DeviceClass *dc = DEVICE_CLASS(klass);
> +    ISADeviceClass *isa = ISA_DEVICE_CLASS(klass);
>   
>       dc->realize = isabus_fdc_realize;
>       dc->fw_name = "fdc";
>       dc->reset = fdctrl_external_reset_isa;
>       dc->vmsd = &vmstate_isa_fdc;
> +    isa->build_aml = fdc_isa_build_aml;
>       device_class_set_props(dc, isa_fdc_properties);
>       set_bit(DEVICE_CATEGORY_STORAGE, dc->categories);
>   }
> diff --git a/hw/i386/acpi-build.c b/hw/i386/acpi-build.c
> index 443db94deb5b..775936e28b9a 100644
> --- a/hw/i386/acpi-build.c
> +++ b/hw/i386/acpi-build.c
> @@ -1058,85 +1058,6 @@ static void build_hpet_aml(Aml *table)
>       aml_append(table, scope);
>   }
>   
> -static Aml *build_fdinfo_aml(int idx, FloppyDriveType type)
> -{
> -    Aml *dev, *fdi;
> -    uint8_t maxc, maxh, maxs;
> -
> -    isa_fdc_get_drive_max_chs(type, &maxc, &maxh, &maxs);
> -
> -    dev = aml_device("FLP%c", 'A' + idx);
> -
> -    aml_append(dev, aml_name_decl("_ADR", aml_int(idx)));
> -
> -    fdi = aml_package(16);
> -    aml_append(fdi, aml_int(idx));  /* Drive Number */
> -    aml_append(fdi,
> -        aml_int(cmos_get_fd_drive_type(type)));  /* Device Type */
> -    /*
> -     * the values below are the limits of the drive, and are thus independent
> -     * of the inserted media
> -     */
> -    aml_append(fdi, aml_int(maxc));  /* Maximum Cylinder Number */
> -    aml_append(fdi, aml_int(maxs));  /* Maximum Sector Number */
> -    aml_append(fdi, aml_int(maxh));  /* Maximum Head Number */
> -    /*
> -     * SeaBIOS returns the below values for int 0x13 func 0x08 regardless of
> -     * the drive type, so shall we
> -     */
> -    aml_append(fdi, aml_int(0xAF));  /* disk_specify_1 */
> -    aml_append(fdi, aml_int(0x02));  /* disk_specify_2 */
> -    aml_append(fdi, aml_int(0x25));  /* disk_motor_wait */
> -    aml_append(fdi, aml_int(0x02));  /* disk_sector_siz */
> -    aml_append(fdi, aml_int(0x12));  /* disk_eot */
> -    aml_append(fdi, aml_int(0x1B));  /* disk_rw_gap */
> -    aml_append(fdi, aml_int(0xFF));  /* disk_dtl */
> -    aml_append(fdi, aml_int(0x6C));  /* disk_formt_gap */
> -    aml_append(fdi, aml_int(0xF6));  /* disk_fill */
> -    aml_append(fdi, aml_int(0x0F));  /* disk_head_sttl */
> -    aml_append(fdi, aml_int(0x08));  /* disk_motor_strt */
> -
> -    aml_append(dev, aml_name_decl("_FDI", fdi));
> -    return dev;
> -}
> -
> -static Aml *build_fdc_device_aml(ISADevice *fdc)
> -{
> -    int i;
> -    Aml *dev;
> -    Aml *crs;
> -
> -#define ACPI_FDE_MAX_FD 4
> -    uint32_t fde_buf[5] = {
> -        0, 0, 0, 0,     /* presence of floppy drives #0 - #3 */
> -        cpu_to_le32(2)  /* tape presence (2 == never present) */
> -    };
> -
> -    dev = aml_device("FDC0");
> -    aml_append(dev, aml_name_decl("_HID", aml_eisaid("PNP0700")));
> -
> -    crs = aml_resource_template();
> -    aml_append(crs, aml_io(AML_DECODE16, 0x03F2, 0x03F2, 0x00, 0x04));
> -    aml_append(crs, aml_io(AML_DECODE16, 0x03F7, 0x03F7, 0x00, 0x01));
> -    aml_append(crs, aml_irq_no_flags(6));
> -    aml_append(crs,
> -        aml_dma(AML_COMPATIBILITY, AML_NOTBUSMASTER, AML_TRANSFER8, 2));
> -    aml_append(dev, aml_name_decl("_CRS", crs));
> -
> -    for (i = 0; i < MIN(MAX_FD, ACPI_FDE_MAX_FD); i++) {
> -        FloppyDriveType type = isa_fdc_get_drive_type(fdc, i);
> -
> -        if (type < FLOPPY_DRIVE_TYPE_NONE) {
> -            fde_buf[i] = cpu_to_le32(1);  /* drive present */
> -            aml_append(dev, build_fdinfo_aml(i, type));
> -        }
> -    }
> -    aml_append(dev, aml_name_decl("_FDE",
> -               aml_buffer(sizeof(fde_buf), (uint8_t *)fde_buf)));
> -
> -    return dev;
> -}
> -
>   static Aml *build_kbd_device_aml(void)
>   {
>       Aml *dev;
> @@ -1175,7 +1096,6 @@ static Aml *build_mouse_device_aml(void)
>   
>   static void build_isa_devices_aml(Aml *table)
>   {
> -    ISADevice *fdc = pc_find_fdc0();
>       bool ambiguous;
>   
>       Aml *scope = aml_scope("_SB.PCI0.ISA");
> @@ -1183,9 +1103,6 @@ static void build_isa_devices_aml(Aml *table)
>   
>       aml_append(scope, build_kbd_device_aml());
>       aml_append(scope, build_mouse_device_aml());
> -    if (fdc) {
> -        aml_append(scope, build_fdc_device_aml(fdc));
> -    }
>   
>       if (ambiguous) {
>           error_report("Multiple ISA busses, unable to define IPMI ACPI data");
> diff --git a/stubs/cmos.c b/stubs/cmos.c
> new file mode 100644
> index 000000000000..416cbe4055ff
> --- /dev/null
> +++ b/stubs/cmos.c
> @@ -0,0 +1,7 @@
> +#include "qemu/osdep.h"
> +#include "hw/i386/pc.h"
> +
> +int cmos_get_fd_drive_type(FloppyDriveType fd0)
> +{
> +    return 0;
> +}
> diff --git a/stubs/Makefile.objs b/stubs/Makefile.objs
> index 45be5dc0ed78..3cbe472d1c6c 100644
> --- a/stubs/Makefile.objs
> +++ b/stubs/Makefile.objs
> @@ -3,6 +3,7 @@ stub-obj-y += bdrv-next-monitor-owned.o
>   stub-obj-y += blk-commit-all.o
>   stub-obj-y += blockdev-close-all-bdrv-states.o
>   stub-obj-y += clock-warp.o
> +stub-obj-y += cmos.o
>   stub-obj-y += cpu-get-clock.o
>   stub-obj-y += cpu-get-icount.o
>   stub-obj-y += dump.o
>
John Snow May 13, 2020, 8:43 p.m. UTC | #2
On 5/7/20 10:05 AM, Philippe Mathieu-Daudé wrote:
> +Hervé
> 
> On 5/7/20 3:16 PM, Gerd Hoffmann wrote:
>> Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>
>> Reviewed-by: Igor Mammedov <imammedo@redhat.com>
>> ---
>>   hw/block/fdc.c       | 83 ++++++++++++++++++++++++++++++++++++++++++++

oh no...

>>   hw/i386/acpi-build.c | 83 --------------------------------------------
>>   stubs/cmos.c         |  7 ++++
>>   stubs/Makefile.objs  |  1 +
>>   4 files changed, 91 insertions(+), 83 deletions(-)
>>   create mode 100644 stubs/cmos.c
>>
>> diff --git a/hw/block/fdc.c b/hw/block/fdc.c
>> index 9628cc171ef8..40faa088b5f7 100644
>> --- a/hw/block/fdc.c
>> +++ b/hw/block/fdc.c
>> @@ -32,6 +32,8 @@
>>   #include "qapi/error.h"
>>   #include "qemu/error-report.h"
>>   #include "qemu/timer.h"
>> +#include "hw/i386/pc.h"
> 
> I'd rather not see this target-specific header used in the generic
> device model... The culprit seems cmos_get_fd_drive_type(). Is the value
> really PC specific?
> 
> Hervé, do you know if such info & RTC nvram layout is used in other arch?
> 

do we need pc-only floppy code somewhere to keep the makefile pure?
that's fine too.

>> +#include "hw/acpi/aml-build.h"
>>   #include "hw/irq.h"
>>   #include "hw/isa/isa.h"
>>   #include "hw/qdev-properties.h"
>> @@ -2765,6 +2767,85 @@ void isa_fdc_get_drive_max_chs(FloppyDriveType
>> type,
>>       (*maxc)--;
>>   }
>>   +static Aml *build_fdinfo_aml(int idx, FloppyDriveType type)
>> +{
>> +    Aml *dev, *fdi;
>> +    uint8_t maxc, maxh, maxs;
>> +
>> +    isa_fdc_get_drive_max_chs(type, &maxc, &maxh, &maxs);
>> +
>> +    dev = aml_device("FLP%c", 'A' + idx);
>> +
>> +    aml_append(dev, aml_name_decl("_ADR", aml_int(idx)));
>> +
>> +    fdi = aml_package(16);
>> +    aml_append(fdi, aml_int(idx));  /* Drive Number */
>> +    aml_append(fdi,
>> +        aml_int(cmos_get_fd_drive_type(type)));  /* Device Type */
>> +    /*
>> +     * the values below are the limits of the drive, and are thus
>> independent
>> +     * of the inserted media
>> +     */
>> +    aml_append(fdi, aml_int(maxc));  /* Maximum Cylinder Number */
>> +    aml_append(fdi, aml_int(maxs));  /* Maximum Sector Number */
>> +    aml_append(fdi, aml_int(maxh));  /* Maximum Head Number */
>> +    /*
>> +     * SeaBIOS returns the below values for int 0x13 func 0x08
>> regardless of
>> +     * the drive type, so shall we
>> +     */
>> +    aml_append(fdi, aml_int(0xAF));  /* disk_specify_1 */
>> +    aml_append(fdi, aml_int(0x02));  /* disk_specify_2 */
>> +    aml_append(fdi, aml_int(0x25));  /* disk_motor_wait */
>> +    aml_append(fdi, aml_int(0x02));  /* disk_sector_siz */
>> +    aml_append(fdi, aml_int(0x12));  /* disk_eot */
>> +    aml_append(fdi, aml_int(0x1B));  /* disk_rw_gap */
>> +    aml_append(fdi, aml_int(0xFF));  /* disk_dtl */
>> +    aml_append(fdi, aml_int(0x6C));  /* disk_formt_gap */
>> +    aml_append(fdi, aml_int(0xF6));  /* disk_fill */
>> +    aml_append(fdi, aml_int(0x0F));  /* disk_head_sttl */
>> +    aml_append(fdi, aml_int(0x08));  /* disk_motor_strt */
>> +
>> +    aml_append(dev, aml_name_decl("_FDI", fdi));
>> +    return dev;
>> +}
>> +
>> +static void fdc_isa_build_aml(ISADevice *isadev, Aml *scope)
>> +{
>> +    Aml *dev;
>> +    Aml *crs;
>> +    int i;
>> +
>> +#define ACPI_FDE_MAX_FD 4
>> +    uint32_t fde_buf[5] = {
>> +        0, 0, 0, 0,     /* presence of floppy drives #0 - #3 */
>> +        cpu_to_le32(2)  /* tape presence (2 == never present) */
>> +    };
>> +
>> +    crs = aml_resource_template();
>> +    aml_append(crs, aml_io(AML_DECODE16, 0x03F2, 0x03F2, 0x00, 0x04));
>> +    aml_append(crs, aml_io(AML_DECODE16, 0x03F7, 0x03F7, 0x00, 0x01));
>> +    aml_append(crs, aml_irq_no_flags(6));
>> +    aml_append(crs,
>> +        aml_dma(AML_COMPATIBILITY, AML_NOTBUSMASTER, AML_TRANSFER8, 2));
>> +
>> +    dev = aml_device("FDC0");
>> +    aml_append(dev, aml_name_decl("_HID", aml_eisaid("PNP0700")));
>> +    aml_append(dev, aml_name_decl("_CRS", crs));
>> +
>> +    for (i = 0; i < MIN(MAX_FD, ACPI_FDE_MAX_FD); i++) {
>> +        FloppyDriveType type = isa_fdc_get_drive_type(isadev, i);
>> +
>> +        if (type < FLOPPY_DRIVE_TYPE_NONE) {
>> +            fde_buf[i] = cpu_to_le32(1);  /* drive present */
>> +            aml_append(dev, build_fdinfo_aml(i, type));
>> +        }
>> +    }
>> +    aml_append(dev, aml_name_decl("_FDE",
>> +               aml_buffer(sizeof(fde_buf), (uint8_t *)fde_buf)));
>> +
>> +    aml_append(scope, dev);
>> +}
>> +
>>   static const VMStateDescription vmstate_isa_fdc ={
>>       .name = "fdc",
>>       .version_id = 2,
>> @@ -2798,11 +2879,13 @@ static Property isa_fdc_properties[] = {
>>   static void isabus_fdc_class_init(ObjectClass *klass, void *data)
>>   {
>>       DeviceClass *dc = DEVICE_CLASS(klass);
>> +    ISADeviceClass *isa = ISA_DEVICE_CLASS(klass);
>>         dc->realize = isabus_fdc_realize;
>>       dc->fw_name = "fdc";
>>       dc->reset = fdctrl_external_reset_isa;
>>       dc->vmsd = &vmstate_isa_fdc;
>> +    isa->build_aml = fdc_isa_build_aml;
>>       device_class_set_props(dc, isa_fdc_properties);
>>       set_bit(DEVICE_CATEGORY_STORAGE, dc->categories);
>>   }
>> diff --git a/hw/i386/acpi-build.c b/hw/i386/acpi-build.c
>> index 443db94deb5b..775936e28b9a 100644
>> --- a/hw/i386/acpi-build.c
>> +++ b/hw/i386/acpi-build.c
>> @@ -1058,85 +1058,6 @@ static void build_hpet_aml(Aml *table)
>>       aml_append(table, scope);
>>   }
>>   -static Aml *build_fdinfo_aml(int idx, FloppyDriveType type)
>> -{
>> -    Aml *dev, *fdi;
>> -    uint8_t maxc, maxh, maxs;
>> -
>> -    isa_fdc_get_drive_max_chs(type, &maxc, &maxh, &maxs);
>> -
>> -    dev = aml_device("FLP%c", 'A' + idx);
>> -
>> -    aml_append(dev, aml_name_decl("_ADR", aml_int(idx)));
>> -
>> -    fdi = aml_package(16);
>> -    aml_append(fdi, aml_int(idx));  /* Drive Number */
>> -    aml_append(fdi,
>> -        aml_int(cmos_get_fd_drive_type(type)));  /* Device Type */
>> -    /*
>> -     * the values below are the limits of the drive, and are thus
>> independent
>> -     * of the inserted media
>> -     */
>> -    aml_append(fdi, aml_int(maxc));  /* Maximum Cylinder Number */
>> -    aml_append(fdi, aml_int(maxs));  /* Maximum Sector Number */
>> -    aml_append(fdi, aml_int(maxh));  /* Maximum Head Number */
>> -    /*
>> -     * SeaBIOS returns the below values for int 0x13 func 0x08
>> regardless of
>> -     * the drive type, so shall we
>> -     */
>> -    aml_append(fdi, aml_int(0xAF));  /* disk_specify_1 */
>> -    aml_append(fdi, aml_int(0x02));  /* disk_specify_2 */
>> -    aml_append(fdi, aml_int(0x25));  /* disk_motor_wait */
>> -    aml_append(fdi, aml_int(0x02));  /* disk_sector_siz */
>> -    aml_append(fdi, aml_int(0x12));  /* disk_eot */
>> -    aml_append(fdi, aml_int(0x1B));  /* disk_rw_gap */
>> -    aml_append(fdi, aml_int(0xFF));  /* disk_dtl */
>> -    aml_append(fdi, aml_int(0x6C));  /* disk_formt_gap */
>> -    aml_append(fdi, aml_int(0xF6));  /* disk_fill */
>> -    aml_append(fdi, aml_int(0x0F));  /* disk_head_sttl */
>> -    aml_append(fdi, aml_int(0x08));  /* disk_motor_strt */
>> -
>> -    aml_append(dev, aml_name_decl("_FDI", fdi));
>> -    return dev;
>> -}
>> -
>> -static Aml *build_fdc_device_aml(ISADevice *fdc)
>> -{
>> -    int i;
>> -    Aml *dev;
>> -    Aml *crs;
>> -
>> -#define ACPI_FDE_MAX_FD 4
>> -    uint32_t fde_buf[5] = {
>> -        0, 0, 0, 0,     /* presence of floppy drives #0 - #3 */
>> -        cpu_to_le32(2)  /* tape presence (2 == never present) */
>> -    };
>> -
>> -    dev = aml_device("FDC0");
>> -    aml_append(dev, aml_name_decl("_HID", aml_eisaid("PNP0700")));
>> -
>> -    crs = aml_resource_template();
>> -    aml_append(crs, aml_io(AML_DECODE16, 0x03F2, 0x03F2, 0x00, 0x04));
>> -    aml_append(crs, aml_io(AML_DECODE16, 0x03F7, 0x03F7, 0x00, 0x01));
>> -    aml_append(crs, aml_irq_no_flags(6));
>> -    aml_append(crs,
>> -        aml_dma(AML_COMPATIBILITY, AML_NOTBUSMASTER, AML_TRANSFER8, 2));
>> -    aml_append(dev, aml_name_decl("_CRS", crs));
>> -
>> -    for (i = 0; i < MIN(MAX_FD, ACPI_FDE_MAX_FD); i++) {
>> -        FloppyDriveType type = isa_fdc_get_drive_type(fdc, i);
>> -
>> -        if (type < FLOPPY_DRIVE_TYPE_NONE) {
>> -            fde_buf[i] = cpu_to_le32(1);  /* drive present */
>> -            aml_append(dev, build_fdinfo_aml(i, type));
>> -        }
>> -    }
>> -    aml_append(dev, aml_name_decl("_FDE",
>> -               aml_buffer(sizeof(fde_buf), (uint8_t *)fde_buf)));
>> -
>> -    return dev;
>> -}
>> -
>>   static Aml *build_kbd_device_aml(void)
>>   {
>>       Aml *dev;
>> @@ -1175,7 +1096,6 @@ static Aml *build_mouse_device_aml(void)
>>     static void build_isa_devices_aml(Aml *table)
>>   {
>> -    ISADevice *fdc = pc_find_fdc0();
>>       bool ambiguous;
>>         Aml *scope = aml_scope("_SB.PCI0.ISA");
>> @@ -1183,9 +1103,6 @@ static void build_isa_devices_aml(Aml *table)
>>         aml_append(scope, build_kbd_device_aml());
>>       aml_append(scope, build_mouse_device_aml());
>> -    if (fdc) {
>> -        aml_append(scope, build_fdc_device_aml(fdc));
>> -    }
>>         if (ambiguous) {
>>           error_report("Multiple ISA busses, unable to define IPMI
>> ACPI data");
>> diff --git a/stubs/cmos.c b/stubs/cmos.c
>> new file mode 100644
>> index 000000000000..416cbe4055ff
>> --- /dev/null
>> +++ b/stubs/cmos.c
>> @@ -0,0 +1,7 @@
>> +#include "qemu/osdep.h"
>> +#include "hw/i386/pc.h"
>> +
>> +int cmos_get_fd_drive_type(FloppyDriveType fd0)
>> +{
>> +    return 0;
>> +}
>> diff --git a/stubs/Makefile.objs b/stubs/Makefile.objs
>> index 45be5dc0ed78..3cbe472d1c6c 100644
>> --- a/stubs/Makefile.objs
>> +++ b/stubs/Makefile.objs
>> @@ -3,6 +3,7 @@ stub-obj-y += bdrv-next-monitor-owned.o
>>   stub-obj-y += blk-commit-all.o
>>   stub-obj-y += blockdev-close-all-bdrv-states.o
>>   stub-obj-y += clock-warp.o
>> +stub-obj-y += cmos.o
>>   stub-obj-y += cpu-get-clock.o
>>   stub-obj-y += cpu-get-icount.o
>>   stub-obj-y += dump.o
>>
>
Thomas Huth May 14, 2020, 5:51 a.m. UTC | #3
On 13/05/2020 22.43, John Snow wrote:
> 
> 
> On 5/7/20 10:05 AM, Philippe Mathieu-Daudé wrote:
>> +Hervé
>>
>> On 5/7/20 3:16 PM, Gerd Hoffmann wrote:
>>> Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>
>>> Reviewed-by: Igor Mammedov <imammedo@redhat.com>
>>> ---
>>>   hw/block/fdc.c       | 83 ++++++++++++++++++++++++++++++++++++++++++++
> 
> oh no...
> 
>>>   hw/i386/acpi-build.c | 83 --------------------------------------------
>>>   stubs/cmos.c         |  7 ++++
>>>   stubs/Makefile.objs  |  1 +
>>>   4 files changed, 91 insertions(+), 83 deletions(-)
>>>   create mode 100644 stubs/cmos.c
>>>
>>> diff --git a/hw/block/fdc.c b/hw/block/fdc.c
>>> index 9628cc171ef8..40faa088b5f7 100644
>>> --- a/hw/block/fdc.c
>>> +++ b/hw/block/fdc.c
>>> @@ -32,6 +32,8 @@
>>>   #include "qapi/error.h"
>>>   #include "qemu/error-report.h"
>>>   #include "qemu/timer.h"
>>> +#include "hw/i386/pc.h"
>>
>> I'd rather not see this target-specific header used in the generic
>> device model... The culprit seems cmos_get_fd_drive_type(). Is the value
>> really PC specific?
>>
>> Hervé, do you know if such info & RTC nvram layout is used in other arch?
>>
> 
> do we need pc-only floppy code somewhere to keep the makefile pure?

Yes, please put this into a separate file that only gets build if the
corresponding CONFIG switches are set. That way you should also get
along without that new stubs/cmos.c file.

 Thomas
Gerd Hoffmann May 15, 2020, 2:47 p.m. UTC | #4
> > +#include "hw/i386/pc.h"
> 
> I'd rather not see this target-specific header used in the generic device
> model... The culprit seems cmos_get_fd_drive_type(). Is the value really PC
> specific?

Given that the same value is used in acpi tables probably not really.
cmos_get_fd_drive_type() hasn't any dependency on pc or cmos btw, we
can simply move over the function to floppy.

> 
> Hervé, do you know if such info & RTC nvram layout is used in other arch?
> 
> > +#include "hw/acpi/aml-build.h"
> >   #include "hw/irq.h"
> >   #include "hw/isa/isa.h"
> >   #include "hw/qdev-properties.h"
> > @@ -2765,6 +2767,85 @@ void isa_fdc_get_drive_max_chs(FloppyDriveType type,
> >       (*maxc)--;
> >   }
> > +static Aml *build_fdinfo_aml(int idx, FloppyDriveType type)
> > +{
> > +    Aml *dev, *fdi;
> > +    uint8_t maxc, maxh, maxs;
> > +
> > +    isa_fdc_get_drive_max_chs(type, &maxc, &maxh, &maxs);
> > +
> > +    dev = aml_device("FLP%c", 'A' + idx);
> > +
> > +    aml_append(dev, aml_name_decl("_ADR", aml_int(idx)));
> > +
> > +    fdi = aml_package(16);
> > +    aml_append(fdi, aml_int(idx));  /* Drive Number */
> > +    aml_append(fdi,
> > +        aml_int(cmos_get_fd_drive_type(type)));  /* Device Type */
> > +    /*
> > +     * the values below are the limits of the drive, and are thus independent
> > +     * of the inserted media
> > +     */
> > +    aml_append(fdi, aml_int(maxc));  /* Maximum Cylinder Number */
> > +    aml_append(fdi, aml_int(maxs));  /* Maximum Sector Number */
> > +    aml_append(fdi, aml_int(maxh));  /* Maximum Head Number */
> > +    /*
> > +     * SeaBIOS returns the below values for int 0x13 func 0x08 regardless of
> > +     * the drive type, so shall we
> > +     */
> > +    aml_append(fdi, aml_int(0xAF));  /* disk_specify_1 */
> > +    aml_append(fdi, aml_int(0x02));  /* disk_specify_2 */
> > +    aml_append(fdi, aml_int(0x25));  /* disk_motor_wait */
> > +    aml_append(fdi, aml_int(0x02));  /* disk_sector_siz */
> > +    aml_append(fdi, aml_int(0x12));  /* disk_eot */
> > +    aml_append(fdi, aml_int(0x1B));  /* disk_rw_gap */
> > +    aml_append(fdi, aml_int(0xFF));  /* disk_dtl */
> > +    aml_append(fdi, aml_int(0x6C));  /* disk_formt_gap */
> > +    aml_append(fdi, aml_int(0xF6));  /* disk_fill */
> > +    aml_append(fdi, aml_int(0x0F));  /* disk_head_sttl */
> > +    aml_append(fdi, aml_int(0x08));  /* disk_motor_strt */
> > +
> > +    aml_append(dev, aml_name_decl("_FDI", fdi));
> > +    return dev;
> > +}
> > +
> > +static void fdc_isa_build_aml(ISADevice *isadev, Aml *scope)
> > +{
> > +    Aml *dev;
> > +    Aml *crs;
> > +    int i;
> > +
> > +#define ACPI_FDE_MAX_FD 4
> > +    uint32_t fde_buf[5] = {
> > +        0, 0, 0, 0,     /* presence of floppy drives #0 - #3 */
> > +        cpu_to_le32(2)  /* tape presence (2 == never present) */
> > +    };
> > +
> > +    crs = aml_resource_template();
> > +    aml_append(crs, aml_io(AML_DECODE16, 0x03F2, 0x03F2, 0x00, 0x04));
> > +    aml_append(crs, aml_io(AML_DECODE16, 0x03F7, 0x03F7, 0x00, 0x01));
> > +    aml_append(crs, aml_irq_no_flags(6));
> > +    aml_append(crs,
> > +        aml_dma(AML_COMPATIBILITY, AML_NOTBUSMASTER, AML_TRANSFER8, 2));
> > +
> > +    dev = aml_device("FDC0");
> > +    aml_append(dev, aml_name_decl("_HID", aml_eisaid("PNP0700")));
> > +    aml_append(dev, aml_name_decl("_CRS", crs));
> > +
> > +    for (i = 0; i < MIN(MAX_FD, ACPI_FDE_MAX_FD); i++) {
> > +        FloppyDriveType type = isa_fdc_get_drive_type(isadev, i);
> > +
> > +        if (type < FLOPPY_DRIVE_TYPE_NONE) {
> > +            fde_buf[i] = cpu_to_le32(1);  /* drive present */
> > +            aml_append(dev, build_fdinfo_aml(i, type));
> > +        }
> > +    }
> > +    aml_append(dev, aml_name_decl("_FDE",
> > +               aml_buffer(sizeof(fde_buf), (uint8_t *)fde_buf)));
> > +
> > +    aml_append(scope, dev);
> > +}
> > +
> >   static const VMStateDescription vmstate_isa_fdc ={
> >       .name = "fdc",
> >       .version_id = 2,
> > @@ -2798,11 +2879,13 @@ static Property isa_fdc_properties[] = {
> >   static void isabus_fdc_class_init(ObjectClass *klass, void *data)
> >   {
> >       DeviceClass *dc = DEVICE_CLASS(klass);
> > +    ISADeviceClass *isa = ISA_DEVICE_CLASS(klass);
> >       dc->realize = isabus_fdc_realize;
> >       dc->fw_name = "fdc";
> >       dc->reset = fdctrl_external_reset_isa;
> >       dc->vmsd = &vmstate_isa_fdc;
> > +    isa->build_aml = fdc_isa_build_aml;
> >       device_class_set_props(dc, isa_fdc_properties);
> >       set_bit(DEVICE_CATEGORY_STORAGE, dc->categories);
> >   }
> > diff --git a/hw/i386/acpi-build.c b/hw/i386/acpi-build.c
> > index 443db94deb5b..775936e28b9a 100644
> > --- a/hw/i386/acpi-build.c
> > +++ b/hw/i386/acpi-build.c
> > @@ -1058,85 +1058,6 @@ static void build_hpet_aml(Aml *table)
> >       aml_append(table, scope);
> >   }
> > -static Aml *build_fdinfo_aml(int idx, FloppyDriveType type)
> > -{
> > -    Aml *dev, *fdi;
> > -    uint8_t maxc, maxh, maxs;
> > -
> > -    isa_fdc_get_drive_max_chs(type, &maxc, &maxh, &maxs);
> > -
> > -    dev = aml_device("FLP%c", 'A' + idx);
> > -
> > -    aml_append(dev, aml_name_decl("_ADR", aml_int(idx)));
> > -
> > -    fdi = aml_package(16);
> > -    aml_append(fdi, aml_int(idx));  /* Drive Number */
> > -    aml_append(fdi,
> > -        aml_int(cmos_get_fd_drive_type(type)));  /* Device Type */
> > -    /*
> > -     * the values below are the limits of the drive, and are thus independent
> > -     * of the inserted media
> > -     */
> > -    aml_append(fdi, aml_int(maxc));  /* Maximum Cylinder Number */
> > -    aml_append(fdi, aml_int(maxs));  /* Maximum Sector Number */
> > -    aml_append(fdi, aml_int(maxh));  /* Maximum Head Number */
> > -    /*
> > -     * SeaBIOS returns the below values for int 0x13 func 0x08 regardless of
> > -     * the drive type, so shall we
> > -     */
> > -    aml_append(fdi, aml_int(0xAF));  /* disk_specify_1 */
> > -    aml_append(fdi, aml_int(0x02));  /* disk_specify_2 */
> > -    aml_append(fdi, aml_int(0x25));  /* disk_motor_wait */
> > -    aml_append(fdi, aml_int(0x02));  /* disk_sector_siz */
> > -    aml_append(fdi, aml_int(0x12));  /* disk_eot */
> > -    aml_append(fdi, aml_int(0x1B));  /* disk_rw_gap */
> > -    aml_append(fdi, aml_int(0xFF));  /* disk_dtl */
> > -    aml_append(fdi, aml_int(0x6C));  /* disk_formt_gap */
> > -    aml_append(fdi, aml_int(0xF6));  /* disk_fill */
> > -    aml_append(fdi, aml_int(0x0F));  /* disk_head_sttl */
> > -    aml_append(fdi, aml_int(0x08));  /* disk_motor_strt */
> > -
> > -    aml_append(dev, aml_name_decl("_FDI", fdi));
> > -    return dev;
> > -}
> > -
> > -static Aml *build_fdc_device_aml(ISADevice *fdc)
> > -{
> > -    int i;
> > -    Aml *dev;
> > -    Aml *crs;
> > -
> > -#define ACPI_FDE_MAX_FD 4
> > -    uint32_t fde_buf[5] = {
> > -        0, 0, 0, 0,     /* presence of floppy drives #0 - #3 */
> > -        cpu_to_le32(2)  /* tape presence (2 == never present) */
> > -    };
> > -
> > -    dev = aml_device("FDC0");
> > -    aml_append(dev, aml_name_decl("_HID", aml_eisaid("PNP0700")));
> > -
> > -    crs = aml_resource_template();
> > -    aml_append(crs, aml_io(AML_DECODE16, 0x03F2, 0x03F2, 0x00, 0x04));
> > -    aml_append(crs, aml_io(AML_DECODE16, 0x03F7, 0x03F7, 0x00, 0x01));
> > -    aml_append(crs, aml_irq_no_flags(6));
> > -    aml_append(crs,
> > -        aml_dma(AML_COMPATIBILITY, AML_NOTBUSMASTER, AML_TRANSFER8, 2));
> > -    aml_append(dev, aml_name_decl("_CRS", crs));
> > -
> > -    for (i = 0; i < MIN(MAX_FD, ACPI_FDE_MAX_FD); i++) {
> > -        FloppyDriveType type = isa_fdc_get_drive_type(fdc, i);
> > -
> > -        if (type < FLOPPY_DRIVE_TYPE_NONE) {
> > -            fde_buf[i] = cpu_to_le32(1);  /* drive present */
> > -            aml_append(dev, build_fdinfo_aml(i, type));
> > -        }
> > -    }
> > -    aml_append(dev, aml_name_decl("_FDE",
> > -               aml_buffer(sizeof(fde_buf), (uint8_t *)fde_buf)));
> > -
> > -    return dev;
> > -}
> > -
> >   static Aml *build_kbd_device_aml(void)
> >   {
> >       Aml *dev;
> > @@ -1175,7 +1096,6 @@ static Aml *build_mouse_device_aml(void)
> >   static void build_isa_devices_aml(Aml *table)
> >   {
> > -    ISADevice *fdc = pc_find_fdc0();
> >       bool ambiguous;
> >       Aml *scope = aml_scope("_SB.PCI0.ISA");
> > @@ -1183,9 +1103,6 @@ static void build_isa_devices_aml(Aml *table)
> >       aml_append(scope, build_kbd_device_aml());
> >       aml_append(scope, build_mouse_device_aml());
> > -    if (fdc) {
> > -        aml_append(scope, build_fdc_device_aml(fdc));
> > -    }
> >       if (ambiguous) {
> >           error_report("Multiple ISA busses, unable to define IPMI ACPI data");
> > diff --git a/stubs/cmos.c b/stubs/cmos.c
> > new file mode 100644
> > index 000000000000..416cbe4055ff
> > --- /dev/null
> > +++ b/stubs/cmos.c
> > @@ -0,0 +1,7 @@
> > +#include "qemu/osdep.h"
> > +#include "hw/i386/pc.h"
> > +
> > +int cmos_get_fd_drive_type(FloppyDriveType fd0)
> > +{
> > +    return 0;
> > +}
> > diff --git a/stubs/Makefile.objs b/stubs/Makefile.objs
> > index 45be5dc0ed78..3cbe472d1c6c 100644
> > --- a/stubs/Makefile.objs
> > +++ b/stubs/Makefile.objs
> > @@ -3,6 +3,7 @@ stub-obj-y += bdrv-next-monitor-owned.o
> >   stub-obj-y += blk-commit-all.o
> >   stub-obj-y += blockdev-close-all-bdrv-states.o
> >   stub-obj-y += clock-warp.o
> > +stub-obj-y += cmos.o
> >   stub-obj-y += cpu-get-clock.o
> >   stub-obj-y += cpu-get-icount.o
> >   stub-obj-y += dump.o
> > 
>
diff mbox series

Patch

diff --git a/hw/block/fdc.c b/hw/block/fdc.c
index 9628cc171ef8..40faa088b5f7 100644
--- a/hw/block/fdc.c
+++ b/hw/block/fdc.c
@@ -32,6 +32,8 @@ 
 #include "qapi/error.h"
 #include "qemu/error-report.h"
 #include "qemu/timer.h"
+#include "hw/i386/pc.h"
+#include "hw/acpi/aml-build.h"
 #include "hw/irq.h"
 #include "hw/isa/isa.h"
 #include "hw/qdev-properties.h"
@@ -2765,6 +2767,85 @@  void isa_fdc_get_drive_max_chs(FloppyDriveType type,
     (*maxc)--;
 }
 
+static Aml *build_fdinfo_aml(int idx, FloppyDriveType type)
+{
+    Aml *dev, *fdi;
+    uint8_t maxc, maxh, maxs;
+
+    isa_fdc_get_drive_max_chs(type, &maxc, &maxh, &maxs);
+
+    dev = aml_device("FLP%c", 'A' + idx);
+
+    aml_append(dev, aml_name_decl("_ADR", aml_int(idx)));
+
+    fdi = aml_package(16);
+    aml_append(fdi, aml_int(idx));  /* Drive Number */
+    aml_append(fdi,
+        aml_int(cmos_get_fd_drive_type(type)));  /* Device Type */
+    /*
+     * the values below are the limits of the drive, and are thus independent
+     * of the inserted media
+     */
+    aml_append(fdi, aml_int(maxc));  /* Maximum Cylinder Number */
+    aml_append(fdi, aml_int(maxs));  /* Maximum Sector Number */
+    aml_append(fdi, aml_int(maxh));  /* Maximum Head Number */
+    /*
+     * SeaBIOS returns the below values for int 0x13 func 0x08 regardless of
+     * the drive type, so shall we
+     */
+    aml_append(fdi, aml_int(0xAF));  /* disk_specify_1 */
+    aml_append(fdi, aml_int(0x02));  /* disk_specify_2 */
+    aml_append(fdi, aml_int(0x25));  /* disk_motor_wait */
+    aml_append(fdi, aml_int(0x02));  /* disk_sector_siz */
+    aml_append(fdi, aml_int(0x12));  /* disk_eot */
+    aml_append(fdi, aml_int(0x1B));  /* disk_rw_gap */
+    aml_append(fdi, aml_int(0xFF));  /* disk_dtl */
+    aml_append(fdi, aml_int(0x6C));  /* disk_formt_gap */
+    aml_append(fdi, aml_int(0xF6));  /* disk_fill */
+    aml_append(fdi, aml_int(0x0F));  /* disk_head_sttl */
+    aml_append(fdi, aml_int(0x08));  /* disk_motor_strt */
+
+    aml_append(dev, aml_name_decl("_FDI", fdi));
+    return dev;
+}
+
+static void fdc_isa_build_aml(ISADevice *isadev, Aml *scope)
+{
+    Aml *dev;
+    Aml *crs;
+    int i;
+
+#define ACPI_FDE_MAX_FD 4
+    uint32_t fde_buf[5] = {
+        0, 0, 0, 0,     /* presence of floppy drives #0 - #3 */
+        cpu_to_le32(2)  /* tape presence (2 == never present) */
+    };
+
+    crs = aml_resource_template();
+    aml_append(crs, aml_io(AML_DECODE16, 0x03F2, 0x03F2, 0x00, 0x04));
+    aml_append(crs, aml_io(AML_DECODE16, 0x03F7, 0x03F7, 0x00, 0x01));
+    aml_append(crs, aml_irq_no_flags(6));
+    aml_append(crs,
+        aml_dma(AML_COMPATIBILITY, AML_NOTBUSMASTER, AML_TRANSFER8, 2));
+
+    dev = aml_device("FDC0");
+    aml_append(dev, aml_name_decl("_HID", aml_eisaid("PNP0700")));
+    aml_append(dev, aml_name_decl("_CRS", crs));
+
+    for (i = 0; i < MIN(MAX_FD, ACPI_FDE_MAX_FD); i++) {
+        FloppyDriveType type = isa_fdc_get_drive_type(isadev, i);
+
+        if (type < FLOPPY_DRIVE_TYPE_NONE) {
+            fde_buf[i] = cpu_to_le32(1);  /* drive present */
+            aml_append(dev, build_fdinfo_aml(i, type));
+        }
+    }
+    aml_append(dev, aml_name_decl("_FDE",
+               aml_buffer(sizeof(fde_buf), (uint8_t *)fde_buf)));
+
+    aml_append(scope, dev);
+}
+
 static const VMStateDescription vmstate_isa_fdc ={
     .name = "fdc",
     .version_id = 2,
@@ -2798,11 +2879,13 @@  static Property isa_fdc_properties[] = {
 static void isabus_fdc_class_init(ObjectClass *klass, void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(klass);
+    ISADeviceClass *isa = ISA_DEVICE_CLASS(klass);
 
     dc->realize = isabus_fdc_realize;
     dc->fw_name = "fdc";
     dc->reset = fdctrl_external_reset_isa;
     dc->vmsd = &vmstate_isa_fdc;
+    isa->build_aml = fdc_isa_build_aml;
     device_class_set_props(dc, isa_fdc_properties);
     set_bit(DEVICE_CATEGORY_STORAGE, dc->categories);
 }
diff --git a/hw/i386/acpi-build.c b/hw/i386/acpi-build.c
index 443db94deb5b..775936e28b9a 100644
--- a/hw/i386/acpi-build.c
+++ b/hw/i386/acpi-build.c
@@ -1058,85 +1058,6 @@  static void build_hpet_aml(Aml *table)
     aml_append(table, scope);
 }
 
-static Aml *build_fdinfo_aml(int idx, FloppyDriveType type)
-{
-    Aml *dev, *fdi;
-    uint8_t maxc, maxh, maxs;
-
-    isa_fdc_get_drive_max_chs(type, &maxc, &maxh, &maxs);
-
-    dev = aml_device("FLP%c", 'A' + idx);
-
-    aml_append(dev, aml_name_decl("_ADR", aml_int(idx)));
-
-    fdi = aml_package(16);
-    aml_append(fdi, aml_int(idx));  /* Drive Number */
-    aml_append(fdi,
-        aml_int(cmos_get_fd_drive_type(type)));  /* Device Type */
-    /*
-     * the values below are the limits of the drive, and are thus independent
-     * of the inserted media
-     */
-    aml_append(fdi, aml_int(maxc));  /* Maximum Cylinder Number */
-    aml_append(fdi, aml_int(maxs));  /* Maximum Sector Number */
-    aml_append(fdi, aml_int(maxh));  /* Maximum Head Number */
-    /*
-     * SeaBIOS returns the below values for int 0x13 func 0x08 regardless of
-     * the drive type, so shall we
-     */
-    aml_append(fdi, aml_int(0xAF));  /* disk_specify_1 */
-    aml_append(fdi, aml_int(0x02));  /* disk_specify_2 */
-    aml_append(fdi, aml_int(0x25));  /* disk_motor_wait */
-    aml_append(fdi, aml_int(0x02));  /* disk_sector_siz */
-    aml_append(fdi, aml_int(0x12));  /* disk_eot */
-    aml_append(fdi, aml_int(0x1B));  /* disk_rw_gap */
-    aml_append(fdi, aml_int(0xFF));  /* disk_dtl */
-    aml_append(fdi, aml_int(0x6C));  /* disk_formt_gap */
-    aml_append(fdi, aml_int(0xF6));  /* disk_fill */
-    aml_append(fdi, aml_int(0x0F));  /* disk_head_sttl */
-    aml_append(fdi, aml_int(0x08));  /* disk_motor_strt */
-
-    aml_append(dev, aml_name_decl("_FDI", fdi));
-    return dev;
-}
-
-static Aml *build_fdc_device_aml(ISADevice *fdc)
-{
-    int i;
-    Aml *dev;
-    Aml *crs;
-
-#define ACPI_FDE_MAX_FD 4
-    uint32_t fde_buf[5] = {
-        0, 0, 0, 0,     /* presence of floppy drives #0 - #3 */
-        cpu_to_le32(2)  /* tape presence (2 == never present) */
-    };
-
-    dev = aml_device("FDC0");
-    aml_append(dev, aml_name_decl("_HID", aml_eisaid("PNP0700")));
-
-    crs = aml_resource_template();
-    aml_append(crs, aml_io(AML_DECODE16, 0x03F2, 0x03F2, 0x00, 0x04));
-    aml_append(crs, aml_io(AML_DECODE16, 0x03F7, 0x03F7, 0x00, 0x01));
-    aml_append(crs, aml_irq_no_flags(6));
-    aml_append(crs,
-        aml_dma(AML_COMPATIBILITY, AML_NOTBUSMASTER, AML_TRANSFER8, 2));
-    aml_append(dev, aml_name_decl("_CRS", crs));
-
-    for (i = 0; i < MIN(MAX_FD, ACPI_FDE_MAX_FD); i++) {
-        FloppyDriveType type = isa_fdc_get_drive_type(fdc, i);
-
-        if (type < FLOPPY_DRIVE_TYPE_NONE) {
-            fde_buf[i] = cpu_to_le32(1);  /* drive present */
-            aml_append(dev, build_fdinfo_aml(i, type));
-        }
-    }
-    aml_append(dev, aml_name_decl("_FDE",
-               aml_buffer(sizeof(fde_buf), (uint8_t *)fde_buf)));
-
-    return dev;
-}
-
 static Aml *build_kbd_device_aml(void)
 {
     Aml *dev;
@@ -1175,7 +1096,6 @@  static Aml *build_mouse_device_aml(void)
 
 static void build_isa_devices_aml(Aml *table)
 {
-    ISADevice *fdc = pc_find_fdc0();
     bool ambiguous;
 
     Aml *scope = aml_scope("_SB.PCI0.ISA");
@@ -1183,9 +1103,6 @@  static void build_isa_devices_aml(Aml *table)
 
     aml_append(scope, build_kbd_device_aml());
     aml_append(scope, build_mouse_device_aml());
-    if (fdc) {
-        aml_append(scope, build_fdc_device_aml(fdc));
-    }
 
     if (ambiguous) {
         error_report("Multiple ISA busses, unable to define IPMI ACPI data");
diff --git a/stubs/cmos.c b/stubs/cmos.c
new file mode 100644
index 000000000000..416cbe4055ff
--- /dev/null
+++ b/stubs/cmos.c
@@ -0,0 +1,7 @@ 
+#include "qemu/osdep.h"
+#include "hw/i386/pc.h"
+
+int cmos_get_fd_drive_type(FloppyDriveType fd0)
+{
+    return 0;
+}
diff --git a/stubs/Makefile.objs b/stubs/Makefile.objs
index 45be5dc0ed78..3cbe472d1c6c 100644
--- a/stubs/Makefile.objs
+++ b/stubs/Makefile.objs
@@ -3,6 +3,7 @@  stub-obj-y += bdrv-next-monitor-owned.o
 stub-obj-y += blk-commit-all.o
 stub-obj-y += blockdev-close-all-bdrv-states.o
 stub-obj-y += clock-warp.o
+stub-obj-y += cmos.o
 stub-obj-y += cpu-get-clock.o
 stub-obj-y += cpu-get-icount.o
 stub-obj-y += dump.o