[POWERPC] Remove ioremap64 and fixup_bigphys_addr

In order to suppose platforms with devices above 4Gb on 32 bits platforms
with a >32 bits physical address space, we used to have a special ioremap64
along with a fixup routine fixup_bigphys_addr.

This shouldn't be necessary anymore as struct resource now supports 64 bits
addresses even on 32 bits archs. This patch enables that option when
CONFIG_PHYS_64BIT is set and removes ioremap64 and fixup_bigphys_addr.

This is a preliminary work for the upcoming merge of 32 and 64 bits io.h

Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Signed-off-by: Paul Mackerras <paulus@samba.org>

arch/powerpc/Kconfig

@@ -247,6 +247,7 @@ config PTE_64BIT
 config PHYS_64BIT
 	bool 'Large physical address support' if E500
 	depends on 44x || E500
+	select RESOURCES_64BIT
 	default y if 44x
 	---help---
 	  This option enables kernel support for larger than 32-bit physical

arch/powerpc/mm/pgtable_32.c

@@ -141,28 +141,11 @@ void pte_free(struct page *ptepage)
 	__free_page(ptepage);
 }
 
-#ifndef CONFIG_PHYS_64BIT
 void __iomem *
 ioremap(phys_addr_t addr, unsigned long size)
 {
 	return __ioremap(addr, size, _PAGE_NO_CACHE);
 }
-#else /* CONFIG_PHYS_64BIT */
-void __iomem *
-ioremap64(unsigned long long addr, unsigned long size)
-{
-	return __ioremap(addr, size, _PAGE_NO_CACHE);
-}
-EXPORT_SYMBOL(ioremap64);
-
-void __iomem *
-ioremap(phys_addr_t addr, unsigned long size)
-{
-	phys_addr_t addr64 = fixup_bigphys_addr(addr, size);
-
-	return ioremap64(addr64, size);
-}
-#endif /* CONFIG_PHYS_64BIT */
 EXPORT_SYMBOL(ioremap);
 
 void __iomem *

arch/powerpc/platforms/85xx/misc.c

@@ -21,11 +21,3 @@ void mpc85xx_restart(char *cmd)
 	local_irq_disable();
 	abort();
 }
-
-/* For now this is a pass through */
-phys_addr_t fixup_bigphys_addr(phys_addr_t addr, phys_addr_t size)
-{
-	return addr;
-};
-
-EXPORT_SYMBOL(fixup_bigphys_addr);