2 * This file is subject to the terms and conditions of the GNU General Public
3 * License. See the file "COPYING" in the main directory of this archive
6 * Copyright (C) 1992 - 1997, 2000-2006 Silicon Graphics, Inc. All rights reserved.
9 #include <asm/sn/types.h>
10 #include <asm/sn/addrs.h>
11 #include <asm/sn/io.h>
12 #include <asm/sn/module.h>
13 #include <asm/sn/intr.h>
14 #include <asm/sn/pcibus_provider_defs.h>
15 #include <asm/sn/pcidev.h>
16 #include <asm/sn/sn_sal.h>
17 #include "xtalk/hubdev.h"
20 * The code in this file will only be executed when running with
21 * a PROM that does _not_ have base ACPI IO support.
22 * (i.e., SN_ACPI_BASE_SUPPORT() == 0)
25 static int max_segment_number; /* Default highest segment number */
26 static int max_pcibus_number = 255; /* Default highest pci bus number */
30 * Retrieve the hub device info structure for the given nasid.
32 static inline u64 sal_get_hubdev_info(u64 handle, u64 address)
34 struct ia64_sal_retval ret_stuff;
38 SAL_CALL_NOLOCK(ret_stuff,
39 (u64) SN_SAL_IOIF_GET_HUBDEV_INFO,
40 (u64) handle, (u64) address, 0, 0, 0, 0, 0);
45 * Retrieve the pci bus information given the bus number.
47 static inline u64 sal_get_pcibus_info(u64 segment, u64 busnum, u64 address)
49 struct ia64_sal_retval ret_stuff;
53 SAL_CALL_NOLOCK(ret_stuff,
54 (u64) SN_SAL_IOIF_GET_PCIBUS_INFO,
55 (u64) segment, (u64) busnum, (u64) address, 0, 0, 0, 0);
61 * sn_fixup_ionodes() - This routine initializes the HUB data structure for
62 * each node in the system. This function is only
63 * executed when running with a non-ACPI capable PROM.
65 static void __init sn_fixup_ionodes(void)
68 struct hubdev_info *hubdev;
72 extern void sn_common_hubdev_init(struct hubdev_info *);
75 * Get SGI Specific HUB chipset information.
76 * Inform Prom that this kernel can support domain bus numbering.
78 for (i = 0; i < num_cnodes; i++) {
79 hubdev = (struct hubdev_info *)(NODEPDA(i)->pdinfo);
80 nasid = cnodeid_to_nasid(i);
81 hubdev->max_segment_number = 0xffffffff;
82 hubdev->max_pcibus_number = 0xff;
83 status = sal_get_hubdev_info(nasid, (u64) __pa(hubdev));
87 /* Save the largest Domain and pcibus numbers found. */
88 if (hubdev->max_segment_number) {
90 * Dealing with a Prom that supports segments.
92 max_segment_number = hubdev->max_segment_number;
93 max_pcibus_number = hubdev->max_pcibus_number;
95 sn_common_hubdev_init(hubdev);
100 * sn_pci_legacy_window_fixup - Create PCI controller windows for
101 * legacy IO and MEM space. This needs to
102 * be done here, as the PROM does not have
103 * ACPI support defining the root buses
104 * and their resources (_CRS),
107 sn_legacy_pci_window_fixup(struct pci_controller *controller,
108 u64 legacy_io, u64 legacy_mem)
110 controller->window = kcalloc(2, sizeof(struct pci_window),
112 if (controller->window == NULL)
114 controller->window[0].offset = legacy_io;
115 controller->window[0].resource.name = "legacy_io";
116 controller->window[0].resource.flags = IORESOURCE_IO;
117 controller->window[0].resource.start = legacy_io;
118 controller->window[0].resource.end =
119 controller->window[0].resource.start + 0xffff;
120 controller->window[0].resource.parent = &ioport_resource;
121 controller->window[1].offset = legacy_mem;
122 controller->window[1].resource.name = "legacy_mem";
123 controller->window[1].resource.flags = IORESOURCE_MEM;
124 controller->window[1].resource.start = legacy_mem;
125 controller->window[1].resource.end =
126 controller->window[1].resource.start + (1024 * 1024) - 1;
127 controller->window[1].resource.parent = &iomem_resource;
128 controller->windows = 2;
132 * sn_pci_window_fixup() - Create a pci_window for each device resource.
133 * It will setup pci_windows for use by
134 * pcibios_bus_to_resource(), pcibios_resource_to_bus(),
138 sn_pci_window_fixup(struct pci_dev *dev, unsigned int count,
141 struct pci_controller *controller = PCI_CONTROLLER(dev->bus);
144 unsigned int new_count;
145 struct pci_window *new_window;
149 idx = controller->windows;
150 new_count = controller->windows + count;
151 new_window = kcalloc(new_count, sizeof(struct pci_window), GFP_KERNEL);
152 if (new_window == NULL)
154 if (controller->window) {
155 memcpy(new_window, controller->window,
156 sizeof(struct pci_window) * controller->windows);
157 kfree(controller->window);
160 /* Setup a pci_window for each device resource. */
161 for (i = 0; i <= PCI_ROM_RESOURCE; i++) {
162 if (pci_addrs[i] == -1)
165 new_window[idx].offset = dev->resource[i].start - pci_addrs[i];
166 new_window[idx].resource = dev->resource[i];
170 controller->windows = new_count;
171 controller->window = new_window;
175 * sn_more_slot_fixup() - We are not running with an ACPI capable PROM,
176 * and need to convert the pci_dev->resource
177 * 'start' and 'end' addresses to mapped addresses,
178 * and setup the pci_controller->window array entries.
181 sn_more_slot_fixup(struct pci_dev *dev, struct pcidev_info *pcidev_info)
183 unsigned int count = 0;
185 s64 pci_addrs[PCI_ROM_RESOURCE + 1];
186 unsigned long addr, end, size, start;
188 /* Copy over PIO Mapped Addresses */
189 for (idx = 0; idx <= PCI_ROM_RESOURCE; idx++) {
191 if (!pcidev_info->pdi_pio_mapped_addr[idx]) {
196 start = dev->resource[idx].start;
197 end = dev->resource[idx].end;
203 pci_addrs[idx] = start;
205 addr = pcidev_info->pdi_pio_mapped_addr[idx];
206 addr = ((addr << 4) >> 4) | __IA64_UNCACHED_OFFSET;
207 dev->resource[idx].start = addr;
208 dev->resource[idx].end = addr + size;
209 if (dev->resource[idx].flags & IORESOURCE_IO)
210 dev->resource[idx].parent = &ioport_resource;
212 dev->resource[idx].parent = &iomem_resource;
213 /* If ROM, mark as shadowed in PROM */
214 if (idx == PCI_ROM_RESOURCE)
215 dev->resource[idx].flags |= IORESOURCE_ROM_BIOS_COPY;
217 /* Create a pci_window in the pci_controller struct for
218 * each device resource.
221 sn_pci_window_fixup(dev, count, pci_addrs);
225 * sn_pci_controller_fixup() - This routine sets up a bus's resources
226 * consistent with the Linux PCI abstraction layer.
229 sn_pci_controller_fixup(int segment, int busnum, struct pci_bus *bus)
232 struct pci_controller *controller;
233 struct pcibus_bussoft *prom_bussoft_ptr;
236 status = sal_get_pcibus_info((u64) segment, (u64) busnum,
237 (u64) ia64_tpa(&prom_bussoft_ptr));
239 return; /*bus # does not exist */
240 prom_bussoft_ptr = __va(prom_bussoft_ptr);
242 controller = kzalloc(sizeof(*controller), GFP_KERNEL);
245 controller->segment = segment;
248 * Temporarily save the prom_bussoft_ptr for use by sn_bus_fixup().
249 * (platform_data will be overwritten later in sn_common_bus_fixup())
251 controller->platform_data = prom_bussoft_ptr;
253 bus = pci_scan_bus(busnum, &pci_root_ops, controller);
255 goto error_return; /* error, or bus already scanned */
257 bus->sysdata = controller;
271 sn_bus_fixup(struct pci_bus *bus)
273 struct pci_dev *pci_dev = NULL;
274 struct pcibus_bussoft *prom_bussoft_ptr;
275 extern void sn_common_bus_fixup(struct pci_bus *,
276 struct pcibus_bussoft *);
279 if (!bus->parent) { /* If root bus */
280 prom_bussoft_ptr = PCI_CONTROLLER(bus)->platform_data;
281 if (prom_bussoft_ptr == NULL) {
283 "sn_bus_fixup: 0x%04x:0x%02x Unable to "
284 "obtain prom_bussoft_ptr\n",
285 pci_domain_nr(bus), bus->number);
288 sn_common_bus_fixup(bus, prom_bussoft_ptr);
289 sn_legacy_pci_window_fixup(PCI_CONTROLLER(bus),
290 prom_bussoft_ptr->bs_legacy_io,
291 prom_bussoft_ptr->bs_legacy_mem);
293 list_for_each_entry(pci_dev, &bus->devices, bus_list) {
294 sn_pci_fixup_slot(pci_dev);
300 * sn_io_init - PROM does not have ACPI support to define nodes or root buses,
301 * so we need to do things the hard way, including initiating the
302 * bus scanning ourselves.
305 void __init sn_io_init(void)
311 /* busses are not known yet ... */
312 for (i = 0; i <= max_segment_number; i++)
313 for (j = 0; j <= max_pcibus_number; j++)
314 sn_pci_controller_fixup(i, j, NULL);