powerpc/4xx: Necessary fixes to PCI for 4GB RAM size

The declaration of total_memory removed.  Now including <mm/mmu_decl.h>
instead.  Since total_memory is a phys_addr_t which is 64-bit on 44x and
is_power_of_2() works with u32 so I just inlined (size & (size-1)) != 0
instead.

Also this patch fixes default initialization: res->end should be 0x7fffffff
not 0x80000000.

Signed-off-by: Ilya Yanok <yanok@emcraft.com>
Acked-by: Stefan Roese <sr@denx.de>
Signed-off-by: Josh Boyer <jwboyer@linux.vnet.ibm.com>

1 files changed, 6 insertions, 7 deletions

diff --git a/arch/powerpc/sysdev/ppc4xx_pci.c b/arch/powerpc/sysdev/ppc4xx_pci.c
index d5c345dbb89d..5da8a44ea2f6 100644
--- a/arch/powerpc/sysdev/ppc4xx_pci.c
+++ b/arch/powerpc/sysdev/ppc4xx_pci.c
@@ -30,14 +30,12 @@
 #include <asm/machdep.h>
 #include <asm/dcr.h>
 #include <asm/dcr-regs.h>
+#include <mm/mmu_decl.h>
 
 #include "ppc4xx_pci.h"
 
 static int dma_offset_set;
 
-/* Move that to a useable header */
-extern unsigned long total_memory;
-
 #define U64_TO_U32_LOW(val)     ((u32)((val) & 0x00000000ffffffffULL))
 #define U64_TO_U32_HIGH(val)    ((u32)((val) >> 32))
 
@@ -105,7 +103,8 @@ static int __init ppc4xx_parse_dma_ranges(struct pci_controller *hose,
 
         /* Default */
         res->start = 0;
-        res->end = size = 0x80000000;
+        size = 0x80000000;
+        res->end = size - 1;
         res->flags = IORESOURCE_MEM | IORESOURCE_PREFETCH;
 
         /* Get dma-ranges property */
@@ -167,13 +166,13 @@ static int __init ppc4xx_parse_dma_ranges(struct pci_controller *hose,
          */
         if (size < total_memory) {
                 printk(KERN_ERR "%s: dma-ranges too small "
-                       "(size=%llx total_memory=%lx)\n",
-                       hose->dn->full_name, size, total_memory);
+                       "(size=%llx total_memory=%llx)\n",
+                       hose->dn->full_name, size, (u64)total_memory);
                 return -ENXIO;
         }
 
         /* Check we are a power of 2 size and that base is a multiple of size*/
-        if (!is_power_of_2(size) ||
+        if ((size & (size - 1)) != 0  ||
             (res->start & (size - 1)) != 0) {
                 printk(KERN_ERR "%s: dma-ranges unaligned\n",
                        hose->dn->full_name);