-gather (up to) 1GB at 1GB
	 * Window 2 is direct access 2GB at 2GB
	 *
	 * NOTE: we need the align_entry settings for Acer devices on ES40,
	 * specifically floppy and IDE when memory is larger than 2GB.
	 */
	hose->sg_isa = iommu_arena_new(hose, 0x00800000, 0x00800000,
				       SMP_CACHE_BYTES);
	/* Initially set for 4 PTEs, but will be overridden to 64K for ISA. */
        hose->sg_isa->align_entry = 4;

	hose->sg_pci = iommu_arena_new(hose, 0x40000000,
				       size_for_memory(0x40000000),
				       SMP_CACHE_BYTES);
        hose->sg_pci->align_entry = 4; /* Tsunami caches 4 PTEs at a time */

	__direct_map_base = 0x80000000;
	__direct_map_size = 0x80000000;

	pchip->wsba[0].csr = hose->sg_isa->dma_base | 3;
	pchip->wsm[0].csr  = (hose->sg_isa->size - 1) & 0xfff00000;
	pchip->tba[0].csr  = virt_to_phys(hose->sg_isa->ptes);

	pchip->wsba[1].csr = hose->sg_pci->dma_base | 3;
	pchip->wsm[1].csr  = (hose->sg_pci->size - 1) & 0xfff00000;
	pchip->tba[1].csr  = virt_to_phys(hose->sg_pci->ptes);

	pchip->wsba[2].csr = 0x80000000 | 1;
	pchip->wsm[2].csr  = (0x80000000 - 1) & 0xfff00000;
	pchip->tba[2].csr  = 0;

	pchip->wsba[3].csr = 0;

	/* Enable the Monster Window to make DAC pci64 possible. */
	pchip->pctl.csr |= pctl_m_mwin;

	tsunami_pci_tbi(hose, 0, -1);
}


void __iomem *
tsunami_ioportmap(unsigned long addr)
{
	FIXUP_IOADDR_VGA(addr);
	return (void __iomem *)(addr + TSUNAMI_IO_BIAS);
}

void __iomem *
tsunami_ioremap(unsigned long addr, unsigned long size)
{
	FIXUP_MEMADDR_VGA(addr);
	return (void __iomem *)(addr + TSUNAMI_MEM_BIAS);
}

#ifndef CONFIG_ALPHA_GENERIC
EXPORT_SYMBOL(tsunami_ioportmap);
EXPORT_SYMBOL(tsunami_ioremap);
#endif

void __init
tsunami_init_arch(void)
{
#ifdef NXM_MACHINE_CHECKS_ON_TSUNAMI
	unsigned long tmp;
	
	/* Ho hum.. init_arch is called before init_IRQ, but we need to be
	   able to handle machine checks.  So install the handler now.  */
	wrent(entInt, 0);

	/* NXMs just don't matter to Tsunami--unless they make it
	   choke completely. */
	tmp = (unsigned long)(TSUNAMI_cchip - 1);
	printk("%s: probing bogus address:  0x%016lx\n", __func__, bogus_addr);
	printk("\tprobe %s\n",
	       tsunami_probe_write((unsigned long *)bogus_addr)
	       ? "succeeded" : "failed");
#endif /* NXM_MACHINE_CHECKS_ON_TSUNAMI */

#if 0
	printk("%s: CChip registers:\n", __func__);
	printk("%s: CSR_CSC 0x%lx\n", __func__, TSUNAMI_cchip->csc.csr);
	printk("%s: CSR_MTR 0x%lx\n", __func__, TSUNAMI_cchip.mtr.csr);
	printk("%s: CSR_MISC 0x%lx\n", __func__, TSUNAMI_cchip->misc.csr);
	printk("%s: CSR_DIM0 0x%lx\n", __func__, TSUNAMI_cchip->dim0.csr);
	printk("%s: CSR_DIM1 0x%lx\n", __func__, TSUNAMI_cchip->dim1.csr);
	printk("%s: CSR_DIR0 0x%lx\n", __func__, TSUNAMI_cchip->dir0.csr);
	printk("%s: CSR_DIR1 0x%lx\n", __func__, TSUNAMI_cchip->dir1.csr);
	printk("%s: CSR_DRIR 0x%lx\n", __func__, TSUNAMI_cchip->drir.csr);

	printk("%s: DChip registers:\n");
	printk("%s: CSR_DSC 0x%lx\n", __func__, TSUNAMI_dchip->dsc.csr);
	printk("%s: CSR_STR 0x%lx\n", __func__, TSUNAMI_dchip->str.csr);
	printk("%s: CSR_DREV 0x%lx\n", __func__, TSUNAMI_dchip->drev.csr);
#endif
	/* With multiple PCI busses, we play with I/O as physical addrs.  */
	ioport_resource.end = ~0UL;

	/* Find how many hoses we have, and initialize them.  TSUNAMI
	   and TYPHOON can have 2, but might only have 1 (DS10).  */

	tsunami_init_one_pchip(TSUNAMI_pchip0, 0);
	if (TSUNAMI_cchip->csc.csr & 1L<<14)
		tsunami_init_one_pchip(TSUNAMI_pchip1, 1);

	/* Check for graphic console location (if any).  */
	find_console_vga_hose();
}

static void
tsunami_kill_one_pchip(tsunami_pchip *pchip, int index)
{
	pchip->wsba[0].csr = saved_config[index].wsba[0];
	pchip->wsm[0].csr = saved_config[index].wsm[0];
	pchip->tba[0].csr = saved_config[index].tba[0];

	pchip->wsba[1].csr = saved_config[index].wsba[1];
	pchip->wsm[1].csr = saved_config[index].wsm[1];
	pchip->tba[1].csr = saved_config[index].tba[1];

	pchip->wsba[2].csr = saved_config[index].wsba[2];
	pchip->wsm[2].csr = saved_config[index].wsm[2];
	pchip->tba[2].csr = saved_config[index].tba[2];

	pchip->wsba[3].csr = saved_config[index].wsba[3];
	pchip->wsm[3].csr = saved_config[index].wsm[3];
	pchip->tba[3].csr = saved_config[index].tba[3];
}

void
tsunami_kill_arch(int mode)
{
	tsunami_kill_one_pchip(TSUNAMI_pchip0, 0);
	if (TSUNAMI_cchip->csc.csr & 1L<<14)
		tsunami_kill_one_pchip(TSUNAMI_pchip1, 1);
}

static inline void
tsunami_pci_clr_err_1(tsunami_pchip *pchip)
{
	pchip->perror.csr;
	pchip->perror.csr = 0x040;
	mb();
	pchip->perror.csr;
}

static inline void
tsunami_pci_clr_err(void)
{
	tsunami_pci_clr_err_1(TSUNAMI_pchip0);

	/* TSUNAMI and TYPHOON can have 2, but might only have 1 (DS10) */
	if (TSUNAMI_cchip->csc.csr & 1L<<14)
		tsunami_pci_clr_err_1(TSUNAMI_pchip1);
}

void
tsunami_machine_check(unsigned long vector, unsigned long la_ptr)
{
	/* Clear error before any reporting.  */
	mb();
	mb();  /* magic */
	draina();
	tsunami_pci_clr_err();
	wrmces(0x7);
	mb();

	process_mcheck_info(vector, la_ptr, "TSUNAMI",
			    mcheck_expected(smp_processor_id()));
}