[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 0d3c95d..4945d70 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,