static int32
scsi_int_dispatch(void *data)
{
BusLogic *bl = (BusLogic *) data;
BL_CCB32 *bl_ccb;
uchar intstat = inb(BL_INT_REG);
#if BOOT
#else
if(!(intstat & BL_INT_INTV)) return B_UNHANDLED_INTERRUPT;
#endif
if(intstat & BL_INT_CMDC) {
bl->done = 1;
#ifdef VERBOSE_IRQ
kprintf("buslogic_irq: Command Complete\n");
#endif
}
if(intstat & BL_INT_RSTS) {
kprintf("buslogic_irq: BUS RESET\n");
}
/* have we got mail? */
if(intstat & BL_INT_IMBL) {
while(bl->in_boxes[bl->in_nextbox].completion_code) {
bl_ccb = (BL_CCB32 *)
PhysToVirt(unLE(bl->in_boxes[bl->in_nextbox].ccb_phys));
#ifdef VERBOSE_IRQ
kprintf("buslogic_irq: CCB %08x (%08x) done, cc=0x%02x\n",
unLE(bl->in_boxes[bl->in_nextbox].ccb_phys), (uint32) bl_ccb,
bl->in_boxes[bl->in_nextbox].completion_code);
#endif
release_sem_etc(bl_ccb->done, 1, B_DO_NOT_RESCHEDULE);
bl->in_boxes[bl->in_nextbox].completion_code = 0;
bl->in_nextbox++;
if(bl->in_nextbox == bl->box_count) bl->in_nextbox = 0;
}
}
/* acknowledge the irq */
outb(BL_CONTROL_REG, BL_CONTROL_RINT);
return B_HANDLED_INTERRUPT;
}
/* specified by XferOffset. */
USHORT CopyToSGList (void FAR *Buffer, ULONG Count, PSCATGATENTRY pSGList,
USHORT cSGList, ULONG XferOffset)
{
ULONG ppXferBuf;
ULONG XferBufLen;
USHORT XferLength;
void far* VirtAddr;
while ((cSGList)&&(pSGList->XferBufLen<=XferOffset))
{ /* Seek into the scatgat list */
XferOffset-=(pSGList++)->XferBufLen;
cSGList--;
}
XferBufLen= 0;
while (Count)
{
if (!XferBufLen) /* Need to use next SG entry */
{
if (!(cSGList--)) /* We run out of SG list elements */
return IOERR_CMD_SGLIST_BAD;
ppXferBuf= pSGList->ppXferBuf+ XferOffset;
XferBufLen= pSGList->XferBufLen- XferOffset;
pSGList++;
XferOffset= 0;
}
XferLength= 32768; /* To fit in USHORT */
if (Count<XferLength) XferLength= Count;
if (XferBufLen<XferLength) XferLength= XferBufLen;
if (!(VirtAddr= PhysToVirt(ppXferBuf,XferLength)))
{
ENABLE
return IOERR_CMD_SGLIST_BAD;
}
memcpy (VirtAddr,Buffer,XferLength);
ENABLE
ppXferBuf+= XferLength;
((char far *)Buffer)+= XferLength;
Count-= XferLength;
XferBufLen-= XferLength;
}
//--------------------------------------------------------------------------
static bool is_kernpage_used(ea_t ea, uint *size)
{
// via pagetable at 0xfffd0000
// fedcba9876543210fedcba9876543210
// sssssssbbbbbbbbbpppp............
int ixPage = (ea >> 20) & 0xFFF;
// first level page table (uncached) (2nd half is r/o)
int dwEntry = ((DWORD*)0xFFFD0000)[ixPage];
*size = (1 << 20);
if ( (dwEntry & 3) == 2 )
{
// section descriptor
return true;
}
else if ( (dwEntry & 0xfffff) == 0 )
{
return false;
}
else if ( (dwEntry & 3) == 1 )
{
*size = (1 << 12);
// coarse page table entry
int phys_2nd_tlb = ea & ~0x3f;
int virt_2nd_tlb = PhysToVirt(phys_2nd_tlb);
if ( virt_2nd_tlb == 0 )
return false;
int ix2ndPage = (ea>>12) & 0xff;
int dw2ndEntry = ((DWORD*)virt_2nd_tlb)[ix2ndPage];
if ( (dw2ndEntry & 3) ==1 )
{
// large page
return true;
}
else if ( (dw2ndEntry & 3) == 2 )
{
// small page
return true;
}
return false;
}
