haraldwolff/qemu-patch-raspberry4
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fdc/sparc32: don't hang on detection under OBP

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Stepping through the SS-5's OBP initialization routines
it looks like reading fdc main status register should
clear the fd interrupt.
The patch doesn't fix problems with fdc on sparc platform,
it only fixes fdc detection.

Signed-off-by: Artyom Tarasenko <atar4qemu@gmail.com>
Signed-off-by: Blue Swirl <blauwirbel@gmail.com>
This commit is contained in:
Artyom Tarasenko 2009-12-13 13:30:44 +00:00 committed by Blue Swirl
parent c5de386ac9
commit 82407d1a40
1 changed files with 6 additions and 0 deletions
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6
hw/fdc.c
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@ -960,6 +960,12 @@ static uint32_t fdctrl_read_main_status (fdctrl_t *fdctrl)
fdctrl->dsr &= ~FD_DSR_PWRDOWN;
fdctrl->dor |= FD_DOR_nRESET;
/* Sparc mutation */
if (fdctrl->sun4m) {
retval |= FD_MSR_DIO;
fdctrl_reset_irq(fdctrl);
};
FLOPPY_DPRINTF("main status register: 0x%02x\n", retval);
return retval;