scall
	 * to determine information about the i/o system. Since XFree86 
	 * relies on glibc's determination to tell whether or not to use
	 * sparse access, we need to point the pci_isa_hose at a real hose
	 * so at least that determination is correct.
	 */
	if (hose->index == 0)
		pci_isa_hose = hose;

	io7_port->csrs = csrs;
	io7_port->hose = hose;
	hose->sysdata = io7_port;

	hose->io_space = alloc_resource();
	hose->mem_space = alloc_resource();

	/*
	 * Base addresses for userland consumption. Since these are going
	 * to be mapped, they are pure physical addresses.
	 */
	hose->sparse_mem_base = hose->sparse_io_base = 0;
	hose->dense_mem_base = IO7_MEM_PHYS(io7->pe, port);
	hose->dense_io_base = IO7_IO_PHYS(io7->pe, port);

	/*
	 * Base addresses and resource ranges for kernel consumption.
	 */
	hose->config_space_base = (unsigned long)IO7_CONF_KERN(io7->pe, port);

	hose->io_space->start = (unsigned long)IO7_IO_KERN(io7->pe, port);
	hose->io_space->end = hose->io_space->start + IO7_IO_SPACE - 1;
	hose->io_space->name = mk_resource_name(io7->pe, port, "IO");
	hose->io_space->flags = IORESOURCE_IO;

	hose->mem_space->start = (unsigned long)IO7_MEM_KERN(io7->pe, port);
	hose->mem_space->end = hose->mem_space->start + IO7_MEM_SPACE - 1;
	hose->mem_space->name = mk_resource_name(io7->pe, port, "MEM");
	hose->mem_space->flags = IORESOURCE_MEM;

	if (request_resource(&ioport_resource, hose->io_space) < 0)
		printk(KERN_ERR "Failed to request IO on hose %d\n", 
		       hose->index);
	if (request_resource(&iomem_resource, hose->mem_space) < 0)
		printk(KERN_ERR "Failed to request MEM on hose %d\n", 
		       hose->index);

	/*
	 * Save the existing DMA window settings for later restoration.
	 */
	for (i = 0; i < 4; i++) {
		io7_port->saved_wbase[i] = csrs->POx_WBASE[i].csr;
		io7_port->saved_wmask[i] = csrs->POx_WMASK[i].csr;
		io7_port->saved_tbase[i] = csrs->POx_TBASE[i].csr;
	}

	/*
	 * Set up the PCI to main memory translation windows.
	 *
	 * Window 0 is scatter-gather 8MB at 8MB
	 * Window 1 is direct access 1GB at 2GB
	 * Window 2 is scatter-gather (up-to) 1GB at 3GB
	 * Window 3 is disabled
	 */

	/*
	 * TBIA before modifying windows.
	 */
	marvel_pci_tbi(hose, 0, -1);

	/*
	 * Set up window 0 for scatter-gather 8MB at 8MB.
	 */
	hose->sg_isa = iommu_arena_new_node(0, hose, 0x00800000, 0x00800000, 0);
	hose->sg_isa->align_entry = 8;	/* cache line boundary */
	csrs->POx_WBASE[0].csr = 
		hose->sg_isa->dma_base | wbase_m_ena | wbase_m_sg;
	csrs->POx_WMASK[0].csr = (hose->sg_isa->size - 1) & wbase_m_addr;
	csrs->POx_TBASE[0].csr = virt_to_phys(hose->sg_isa->ptes);

	/*
	 * Set up window 1 for direct-mapped 1GB at 2GB.
	 */
	csrs->POx_WBASE[1].csr = __direct_map_base | wbase_m_ena;
	csrs->POx_WMASK[1].csr = (__direct_map_size - 1) & wbase_m_addr;
	csrs->POx_TBASE[1].csr = 0;

	/*
	 * Set up window 2 for scatter-gather (up-to) 1GB at 3GB.
	 */
	hose->sg_pci = iommu_arena_new_node(0, hose, 0xc0000000, 0x40000000, 0);
	hose->sg_pci->align_entry = 8;	/* cache line boundary */
	csrs->POx_WBASE[2].csr = 
		hose->sg_pci->dma_base | wbase_m_ena | wbase_m_sg;
	csrs->POx_WMASK[2].csr = (hose->sg_pci->size - 1) & wbase_m_addr;
	csrs->POx_TBASE[2].csr = virt_to_phys(hose->sg_pci->ptes);

	/*
	 * Disable window 3.
	 */
	csrs->POx_WBASE[3].csr = 0;

	/*
	 * Make sure that the AGP Monster Window is disabled.
	 */
	csrs->POx_CTRL.csr &= ~(1UL << 61);

#if 1
	printk("FIXME: disabling master aborts\n");
	csrs->POx_MSK_HEI.csr &= ~(3UL << 14);
#endif
	/*
	 * TBIA after modifying windows.
	 */
	marvel_pci_tbi(hose, 0, -1);
}

static void __init
marvel_init_io7(struct io7 *io7)
{
	int i;

	printk("Initializing IO7 at PID %d\n", io7->pe);

	/*
	 * Get the Port 7 CSR pointer.
	 */
	io7->csrs = IO7_PORT7_CSRS_KERN(io7->pe);

	/*
	 * Init this IO7's hoses.
	 */
	for (i = 0; i < IO7_NUM_PORTS; i++) {
		io7_ioport_csrs *csrs = IO7_CSRS_KERN(io7->pe, i);
		if (csrs->POx_CACHE_CTL.csr == 8) {
			io7->ports[i].enabled = 1;
			io7_init_hose(io7, i);
		}
	}
}

static void __init
marvel_io7_present(gct6_node *node)
{
	int pe;

	if (node->type != GCT_TYPE_HOSE ||
	    node->subtype != GCT_SUBTYPE_IO_PORT_MODULE) 
		return;

	pe = (node->id >> 8) & 0xff;
	printk("Found an IO7 at PID %d\n", pe);

	alloc_io7(pe);
}

static void __init
marvel_find_console_vga_hose(void)
{
#ifdef CONFIG_VGA_HOSE
	u64 *pu64 = (u64 *)((u64)hwrpb + hwrpb->ctbt_offset);

	if (pu64[7] == 3) {	/* TERM_TYPE == graphics */
		struct pci_controller *hose = NULL;
		int h = (pu64[30] >> 24) & 0xff; /* TERM_OUT_LOC, hose # */
		struct io7 *io7;
		int pid, port;

		/* FIXME - encoding is going to have to change for Marvel
		 *         since hose will be able to overflow a byte...
		 *         need to fix this decode when the console 
		 *         changes its encoding
		 */
		printk("console graphics is on hose %d (console)\n", h);

		/*
		 * The console's hose numbering is:
		 *
		 *	hose<n:2>: PID
		 *	hose<1:0>: PORT
		 *
		 * We need to find the hose at that pid and port
		 */
		pid = h >> 2;
		port = h & 3;
		if ((io7 = marvel_find_io7(pid)))
			hose = io7->ports[port].hose;

		if (hose) {
			printk("Console graphics on hose %d\n", hose->index);
			pci_vga_hose = hose;
		}
	}
#endif
}

gct6_search_struct gct_wanted_node_list[] __initdata = {
	{ GCT_TYPE_HOSE, GCT_SUBTYPE_IO_PORT_MODULE, marvel_io7_present },
	{ 0, 0, NULL }
};

/*
 * In case the GCT is not complete, let the user specify PIDs with IO7s
 * at boot time. Syntax is 'io7=a,b,c,...,n' where a-n are the PIDs (decimal)
 * where IO7s are connected
 */
static int __init
marvel_specify_io7(char *str)
{
	unsigned long pid;
	struct io7 *io7;
	char *pchar;

	do {
		pid = simple_strtoul(str, &pchar, 0);
		if (pchar != str) {
			printk("User-specified IO7 at PID %lu\n", pid);
			io7 = alloc_io7(pid);
			if (io7) marvel_init_io7(io7);
		}

		if (pchar == str) pchar++;
		str = pchar;
	} while(*str);

	return 1;
}
__setup("io7=", marvel_specify_io7);

void __init
marvel_init_arch(void)
{
	struct io7 *io7;

	/* With multiple PCI busses, we play with I/O as physical addrs.  */
	ioport_resource.end = ~0UL;

	/* PCI DMA Direct Mapping is 1GB at 2GB.  */
	__direct_map_base = 0x80000000;
	__direct_map_size = 0x40000000;

	/* Parse the config tree.  */
	gct6_find_nodes(GCT_NODE_PTR(0), gct_wanted_node_list);

	/* Init the io7s.  */
	for (io7 = NULL; NULL != (io7 = marvel_next_io7(io7)); ) 
		marvel_init_io7(io7);

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

void
marvel_kill_arch(int mode)
{
}