[SPARC64]: Consolidate PCI mem/io resource determination.

It can be done for every PCI configuration using OF properties.

Signed-off-by: David S. Miller <davem@davemloft.net>

1 files changed, 89 insertions, 5 deletions

diff --git a/arch/sparc64/kernel/pci_common.c b/arch/sparc64/kernel/pci_common.c
index 0d3c95df0d95..4945d700a769 100644
--- a/arch/sparc64/kernel/pci_common.c
+++ b/arch/sparc64/kernel/pci_common.c
@@ -1,7 +1,6 @@
-/* $Id: pci_common.c,v 1.29 2002/02/01 00:56:03 davem Exp $
- * pci_common.c: PCI controller common support.
+/* pci_common.c: PCI controller common support.
  *
- * Copyright (C) 1999 David S. Miller (davem@redhat.com)
+ * Copyright (C) 1999, 2007 David S. Miller (davem@davemloft.net)
  */
 
 #include <linux/string.h>
@@ -16,8 +15,8 @@
 
 #include "pci_impl.h"
 
-void pci_register_legacy_regions(struct resource *io_res,
-                                 struct resource *mem_res)
+static void pci_register_legacy_regions(struct resource *io_res,
+                                        struct resource *mem_res)
 {
         struct resource *p;
 
@@ -53,6 +52,91 @@ void pci_register_legacy_regions(struct resource *io_res,
         request_resource(mem_res, p);
 }
 
+static void pci_register_iommu_region(struct pci_pbm_info *pbm)
+{
+        u32 *vdma = of_get_property(pbm->prom_node, "virtual-dma", NULL);
+
+        if (vdma) {
+                struct resource *rp = kmalloc(sizeof(*rp), GFP_KERNEL);
+
+                if (!rp) {
+                        prom_printf("Cannot allocate IOMMU resource.\n");
+                        prom_halt();
+                }
+                rp->name = "IOMMU";
+                rp->start = pbm->mem_space.start + (unsigned long) vdma[0];
+                rp->end = rp->start + (unsigned long) vdma[1] - 1UL;
+                rp->flags = IORESOURCE_BUSY;
+                request_resource(&pbm->mem_space, rp);
+        }
+}
+
+void pci_determine_mem_io_space(struct pci_pbm_info *pbm)
+{
+        int i, saw_mem, saw_io;
+
+        saw_mem = saw_io = 0;
+        for (i = 0; i < pbm->num_pbm_ranges; i++) {
+                struct linux_prom_pci_ranges *pr = &pbm->pbm_ranges[i];
+                unsigned long a;
+                int type;
+
+                type = (pr->child_phys_hi >> 24) & 0x3;
+                a = (((unsigned long)pr->parent_phys_hi << 32UL) |
+                     ((unsigned long)pr->parent_phys_lo  <<  0UL));
+
+                switch (type) {
+                case 0:
+                        /* PCI config space, 16MB */
+                        pbm->config_space = a;
+                        break;
+
+                case 1:
+                        /* 16-bit IO space, 16MB */
+                        pbm->io_space.start = a;
+                        pbm->io_space.end = a + ((16UL*1024UL*1024UL) - 1UL);
+                        pbm->io_space.flags = IORESOURCE_IO;
+                        saw_io = 1;
+                        break;
+
+                case 2:
+                        /* 32-bit MEM space, 2GB */
+                        pbm->mem_space.start = a;
+                        pbm->mem_space.end = a + (0x80000000UL - 1UL);
+                        pbm->mem_space.flags = IORESOURCE_MEM;
+                        saw_mem = 1;
+                        break;
+
+                case 3:
+                        /* XXX 64-bit MEM handling XXX */
+
+                default:
+                        break;
+                };
+        }
+
+        if (!saw_io || !saw_mem) {
+                prom_printf("%s: Fatal error, missing %s PBM range.\n",
+                            pbm->name,
+                            (!saw_io ? "IO" : "MEM"));
+                prom_halt();
+        }
+
+        printk("%s: PCI IO[%lx] MEM[%lx]\n",
+               pbm->name,
+               pbm->io_space.start,
+               pbm->mem_space.start);
+
+        pbm->io_space.name = pbm->mem_space.name = pbm->name;
+
+        request_resource(&ioport_resource, &pbm->io_space);
+        request_resource(&iomem_resource, &pbm->mem_space);
+
+        pci_register_legacy_regions(&pbm->io_space,
+                                    &pbm->mem_space);
+        pci_register_iommu_region(pbm);
+}
+
 /* Generic helper routines for PCI error reporting. */
 void pci_scan_for_target_abort(struct pci_controller_info *p,
                                struct pci_pbm_info *pbm,