-static void
-sba_ioc_init_pluto(struct parisc_device *sba, struct ioc *ioc, int ioc_num)
-{
- /* lba_set_iregs() is in arch/parisc/kernel/lba_pci.c */
- extern void lba_set_iregs(struct parisc_device *, u32, u32);
-
- u32 iova_space_mask;
- u32 iova_space_size;
- int iov_order, tcnfg;
- struct parisc_device *lba;
-#if SBA_AGP_SUPPORT
- int agp_found = 0;
-#endif
- /*
- ** Firmware programs the base and size of a "safe IOVA space"
- ** (one that doesn't overlap memory or LMMIO space) in the
- ** IBASE and IMASK registers.
- */
- ioc->ibase = READ_REG(ioc->ioc_hpa + IOC_IBASE);
- iova_space_size = ~(READ_REG(ioc->ioc_hpa + IOC_IMASK) & 0xFFFFFFFFUL) + 1;
-
- if ((ioc->ibase < 0xfed00000UL) && ((ioc->ibase + iova_space_size) > 0xfee00000UL)) {
- printk("WARNING: IOV space overlaps local config and interrupt message, truncating\n");
- iova_space_size /= 2;
- }
-
- /*
- ** iov_order is always based on a 1GB IOVA space since we want to
- ** turn on the other half for AGP GART.
- */
- iov_order = get_order(iova_space_size >> (IOVP_SHIFT - PAGE_SHIFT));
- ioc->pdir_size = (iova_space_size / IOVP_SIZE) * sizeof(u64);
-
- DBG_INIT("%s() hpa 0x%lx IOV %dMB (%d bits)\n",
- __FUNCTION__, ioc->ioc_hpa, iova_space_size >> 20,
- iov_order + PAGE_SHIFT);
-
- ioc->pdir_base = (void *) __get_free_pages(GFP_KERNEL,
- get_order(ioc->pdir_size));
- if (!ioc->pdir_base)
- panic("Couldn't allocate I/O Page Table\n");
-
- memset(ioc->pdir_base, 0, ioc->pdir_size);
-
- DBG_INIT("%s() pdir %p size %x\n",
- __FUNCTION__, ioc->pdir_base, ioc->pdir_size);
-
-#if SBA_HINT_SUPPORT
- ioc->hint_shift_pdir = iov_order + PAGE_SHIFT;
- ioc->hint_mask_pdir = ~(0x3 << (iov_order + PAGE_SHIFT));
-
- DBG_INIT(" hint_shift_pdir %x hint_mask_pdir %lx\n",
- ioc->hint_shift_pdir, ioc->hint_mask_pdir);
-#endif
-
- ASSERT((((unsigned long) ioc->pdir_base) & PAGE_MASK) == (unsigned long) ioc->pdir_base);
- WRITE_REG(virt_to_phys(ioc->pdir_base), ioc->ioc_hpa + IOC_PDIR_BASE);
-
- /* build IMASK for IOC and Elroy */
- iova_space_mask = 0xffffffff;
- iova_space_mask <<= (iov_order + PAGE_SHIFT);
- ioc->imask = iova_space_mask;
-#ifdef ZX1_SUPPORT
- ioc->iovp_mask = ~(iova_space_mask + PAGE_SIZE - 1);
-#endif
- sba_dump_tlb(ioc->ioc_hpa);
-
- /*
- ** setup Mercury IBASE/IMASK registers as well.
- */
- for (lba = sba->child; lba; lba = lba->sibling) {
- int rope_num = (lba->hpa >> 13) & 0xf;
- if (rope_num >> 3 == ioc_num)
- lba_set_iregs(lba, ioc->ibase, ioc->imask);
- }
-
- WRITE_REG(ioc->imask, ioc->ioc_hpa + IOC_IMASK);
-
-#ifdef __LP64__
- /*
- ** Setting the upper bits makes checking for bypass addresses
- ** a little faster later on.
- */
- ioc->imask |= 0xFFFFFFFF00000000UL;
-#endif
-
- /* Set I/O PDIR Page size to system page size */
- switch (PAGE_SHIFT) {
- case 12: tcnfg = 0; break; /* 4K */
- case 13: tcnfg = 1; break; /* 8K */
- case 14: tcnfg = 2; break; /* 16K */
- case 16: tcnfg = 3; break; /* 64K */
- default:
- panic(__FILE__ "Unsupported system page size %d",
- 1 << PAGE_SHIFT);
- break;
- }
- WRITE_REG(tcnfg, ioc->ioc_hpa + IOC_TCNFG);
-
- /*
- ** Program the IOC's ibase and enable IOVA translation
- ** Bit zero == enable bit.
- */
- WRITE_REG(ioc->ibase | 1, ioc->ioc_hpa + IOC_IBASE);
-
- /*
- ** Clear I/O TLB of any possible entries.
- ** (Yes. This is a bit paranoid...but so what)
- */
- WRITE_REG(ioc->ibase | 31, ioc->ioc_hpa + IOC_PCOM);
-
-#if SBA_AGP_SUPPORT
- /*
- ** If an AGP device is present, only use half of the IOV space
- ** for PCI DMA. Unfortunately we can't know ahead of time
- ** whether GART support will actually be used, for now we
- ** can just key on any AGP device found in the system.
- ** We program the next pdir index after we stop w/ a key for
- ** the GART code to handshake on.
- */
- device=NULL;
- for (lba = sba->child; lba; lba = lba->sibling) {
- if (IS_QUICKSILVER(lba))
- break;
- }
-
- if (lba) {
- DBG_INIT("%s: Reserving half of IOVA space for AGP GART support\n", __FUNCTION__);
- ioc->pdir_size /= 2;
- ((u64 *)ioc->pdir_base)[PDIR_INDEX(iova_space_size/2)] = SBA_IOMMU_COOKIE;
- } else {
- DBG_INIT("%s: No GART needed - no AGP controller found\n", __FUNCTION__);
- }
-#endif /* 0 */
-
-}