RealView/EB PCI IO Support

Signed-off-by: Bahadir Balban <bahadir.balban@arm.com>
Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>

arch/arm/mach-realview/pci.c

@@ -264,6 +264,7 @@ int __init pci_realview_eb_setup(int nr, struct pci_sys_data *sys)
 
 	if (nr == 0) {
 		sys->mem_offset = 0;
+		sys->io_offset = REALVIEW_EB_PCI_IO_BASE0;
 		ret = pci_realview_eb_setup_resources(sys->resource);
 		if (ret < 0) {
 			printk("pci_versatile_setup: resources... oops?\n");

arch/arm/mach-realview/realview_eb.c

@@ -100,6 +100,11 @@ static struct map_desc realview_eb_io_desc[] __initdata = {
 		.pfn		= __phys_to_pfn(REALVIEW_EB_PCI_CFG_BASE),
 		.length		= REALVIEW_EB_PCI_CFG_BASE_SIZE,
 		.type		= MT_DEVICE
+	}, {
+		.virtual	= REALVIEW_EB_PCI_IO_VIRT_BASE,
+		.pfn		= __phys_to_pfn(REALVIEW_EB_PCI_IO_BASE0),
+		.length		= REALVIEW_EB_PCI_IO_BASE0_SIZE,
+		.type		= MT_DEVICE
 	},
 #endif
 };

include/asm-arm/arch-realview/hardware.h

@@ -29,6 +29,7 @@
  */
 #define REALVIEW_EB_PCI_VIRT_BASE	0xe8000000
 #define REALVIEW_EB_PCI_CFG_VIRT_BASE	0xe9000000
+#define REALVIEW_EB_PCI_IO_VIRT_BASE	0xea000000
 
 /* CIK guesswork */
 #define PCIBIOS_MIN_IO			0x62000000
@@ -42,6 +43,6 @@
 #else
 #define IO_ADDRESS(x)		(x)
 #endif
-#define __io_address(n)		__io(IO_ADDRESS(n))
+#define __io_address(n)		((void __iomem *)IO_ADDRESS(n))
 
 #endif

include/asm-arm/arch-realview/io.h

@@ -20,11 +20,20 @@
 #ifndef __ASM_ARM_ARCH_IO_H
 #define __ASM_ARM_ARCH_IO_H
 
+#include <asm/arch/hardware.h>
+#include <asm/arch/board-eb.h>
+
 #define IO_SPACE_LIMIT 0xffffffff
 
+#if defined(CONFIG_MMU) && defined(CONFIG_MACH_REALVIEW_EB)
+#define __pci_io	(REALVIEW_EB_PCI_IO_VIRT_BASE - REALVIEW_EB_PCI_IO_BASE0)
+#else
+#define __pci_io	0
+#endif
+
 static inline void __iomem *__io(unsigned long addr)
 {
-	return (void __iomem *)addr;
+	return (void __iomem *)(addr + __pci_io);
 }
 
 #define __io(a)			__io(a)