From 2084c5af6dc03b500622ae8844bc69cc5a8e51fb Mon Sep 17 00:00:00 2001
From: Simon Glass <sjg@chromium.org>
Date: Thu, 19 Nov 2015 20:26:57 -0700
Subject: 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 1d93194..6d860c4 100644
--- 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;
 }
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