Signed-off-by: NBlue Swirl <blauwirbel@gmail.com>

This reverts commit 8217606e (and
updates later added users of qemu_register_reset), we solved the
problem it originally addressed less invasively.
Signed-off-by: NJan Kiszka <jan.kiszka@siemens.com>
Signed-off-by: NAnthony Liguori <aliguori@us.ibm.com>

The parameter is always zero except when registering the three internal
io regions (ROM, unassigned, notdirty).  Remove the parameter to reduce
the API's power, thus facilitating future change.
Signed-off-by: NAvi Kivity <avi@redhat.com>
Signed-off-by: NAnthony Liguori <aliguori@us.ibm.com>

Add the parameter 'order' to qemu_register_reset and sort callbacks on
registration. On system reset, callbacks with lower order will be
invoked before those with higher order. Update all existing users to the
standard order 0.

Note: At least for x86, the existing users seem to assume that handlers
are called in their registration order. Therefore, the patch preserves
this property. If someone feels bored, (s)he could try to identify this
dependency and express it properly on callback registration.
Signed-off-by: NJan Kiszka <jan.kiszka@siemens.com>
Signed-off-by: NAnthony Liguori <aliguori@us.ibm.com>

Signed-off-by: NBlue Swirl <blauwirbel@gmail.com>

Signed-off-by: NAvi Kivity <avi@redhat.com>
Signed-off-by: NAnthony Liguori <aliguori@us.ibm.com>


git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@6529 c046a42c-6fe2-441c-8c8c-71466251a162

Original text below.

Attached is a patch that changes how the emulated floppy controller replies to Sense Interrupt Status commands immediately after a controller reset. The specs state that after a Reset the 82078 goes into polling mode which needs four Sense Interrupt Status commands to be issued afterwards to clear the status of each drive. Currently we always respond to Sense Interrupt Status with a SEEK END instead of POLLING. This causes a problem with the SCO Openserver installer which is expects a POLLING state after reset. This patch returns a POLLING status for four Sense Interrupt Status requests immediately after a controller reset. This approach mirrors the way Bochs handles this situation. With the attached patch applied Openserver gets further when trying to load storage drivers from the floppy disk (blocked by another issue, patch on its way). I have successfully tested the floppy drive on the following OSs after applying this patch: Windows 98, Windows XP SP2, Linux x86 (SysRescCD 1.1.3 and Ubuntu 8.10).

Justin

Changelog:

Properly handle Sense Interrupt Status after FDC Reset
Signed-off-by: NJustin Chevrier <theburner1@yahoo.com>


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Change from v1:
  Avoid changing the existing coding style in certain files.
Signed-off-by: NStuart Brady <stuart.brady@gmail.com>

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In floppy controller, transfer data len is not correctly calculated.
We should read up to the last sector specified by the caller, and not up to
the last sector of the floppy.



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In floppy controller, programming PIO writes which are more than one sector
long leads to a buffer overflow of the fdtrl->fifo[] array.


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- Replaces access to cur_drv field by macros.


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- Supports up to 4 floppy drives if MAX_FD is set to 4.


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- Replaces bootsel field by the whole tdr register. It may be easier if we want to later add support for tapes.


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- Removes useless fields in fdrive_t structure.
- Adds a message when bdrv_read/bdrv_write calls fail.
- Rename int_status to status0.
- Replace some constants by value names.


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- Stores controller state in MSR register instead of internal state field. This simplifies the fdctrl_read_main_status() function, which may be called in some tight loops.


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- Better handling of DOR register. DOR register drives external motors, but it not limited to existing drives.
- Use FD_DOR_nRESET flag instead of internal FD_CTRL_RESET flag.
- Support writing to DOR register even in reset mode (as said in specification)


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- Handles correctly FD_MSR_NONDMA/FD_DOR_NONDMA flags, and uses them when possible. Fixes a problem with SPECIFY command.


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- Fixes status A and status B registers. It removes one Sun4m mutation. Also removes the internal FD_CTRL_INTR flag.


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- Extract seeking to next sector handling in a function. Add a sector seek in PIO read and write modes


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- Adds a command lookup table, as suggested by Fabrice at http://lists.gnu.org/archive/html/qemu-devel/2008-04/msg00143.html
- This also moves initialization functions at the bottom of the file to prevent multiple forward declarations.


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  nb_sectors instead of len in bytes but the fdc driver has never been fixed.


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