dm: pci: Set up the SDRAM mapping correctly

SDRAM doesn't always start at 0. Adjust the region mapping so that it works
on platforms where SDRAM is somewhere else.

This needs testing on other platforms.

Signed-off-by: Simon Glass <sjg@chromium.org>
Tested-by: Stephen Warren <swarren@nvidia.com>

diff --git a/drivers/pci/pci-uclass.c b/drivers/pci/pci-uclass.c
index 1d93194b6755474ff18f7422c37fa7bf533074ec..6d860c4733b45e5aad2356ebbf8e1c6efe511c35 100644 (file)
--- a/drivers/pci/pci-uclass.c
+++ b/drivers/pci/pci-uclass.c
@@ -680,8 +680,8 @@ static int decode_regions(struct pci_controller *hose, const void *blob,
                          int parent_node, int node)
 {
        int pci_addr_cells, addr_cells, size_cells;
+       phys_addr_t base = 0, size;
        int cells_per_record;
-       phys_addr_t addr;
        const u32 *prop;
        int len;
        int i;
@@ -732,11 +732,14 @@ static int decode_regions(struct pci_controller *hose, const void *blob,
        }
 
        /* Add a region for our local memory */
-       addr = gd->ram_size;
-       if (gd->pci_ram_top && gd->pci_ram_top < addr)
-               addr = gd->pci_ram_top;
-       pci_set_region(hose->regions + hose->region_count++, 0, 0, addr,
-                      PCI_REGION_MEM | PCI_REGION_SYS_MEMORY);
+       size = gd->ram_size;
+#ifdef CONFIG_SYS_SDRAM_BASE
+       base = CONFIG_SYS_SDRAM_BASE;
+#endif
+       if (gd->pci_ram_top && gd->pci_ram_top < base + size)
+               size = gd->pci_ram_top - base;
+       pci_set_region(hose->regions + hose->region_count++, base, base,
+                      size, PCI_REGION_MEM | PCI_REGION_SYS_MEMORY);
 
        return 0;
 }