8 files changed, 224 insertions, 247 deletions

diff --git a/arch/powerpc/Kconfig b/arch/powerpc/Kconfig
index 3d26ba7ad76d..3e89d9d34937 100644
--- a/arch/powerpc/Kconfig
+++ b/arch/powerpc/Kconfig
@@ -394,6 +394,7 @@ config PPC_PSERIES
 config PPC_ISERIES
         bool "IBM Legacy iSeries"
         depends on PPC_MULTIPLATFORM && PPC64
+        select PPC_INDIRECT_IO
 
 config PPC_CHRP
         bool "Common Hardware Reference Platform (CHRP) based machines"
@@ -548,6 +549,15 @@ config PPC_970_NAP
         bool
         default n
 
+config PPC_INDIRECT_IO
+        bool
+        select GENERIC_IOMAP
+        default n
+
+config GENERIC_IOMAP
+        bool
+        default n
+
 source "drivers/cpufreq/Kconfig"
 
 config CPU_FREQ_PMAC
diff --git a/arch/powerpc/kernel/Makefile b/arch/powerpc/kernel/Makefile
index eba8d118e214..600954df07ae 100644
--- a/arch/powerpc/kernel/Makefile
+++ b/arch/powerpc/kernel/Makefile
@@ -62,7 +62,7 @@ obj-$(CONFIG_PPC_UDBG_16550)	+= legacy_serial.o udbg_16550.o
 module-$(CONFIG_PPC64)          += module_64.o
 obj-$(CONFIG_MODULES)           += $(module-y)
 
-pci64-$(CONFIG_PPC64)           += pci_64.o pci_dn.o iomap.o
+pci64-$(CONFIG_PPC64)           += pci_64.o pci_dn.o
 pci32-$(CONFIG_PPC32)           := pci_32.o
 obj-$(CONFIG_PCI)               += $(pci64-y) $(pci32-y)
 kexec-$(CONFIG_PPC64)           := machine_kexec_64.o
@@ -71,6 +71,10 @@ obj-$(CONFIG_KEXEC)		+= machine_kexec.o crash.o $(kexec-y)
 obj-$(CONFIG_AUDIT)             += audit.o
 obj64-$(CONFIG_AUDIT)           += compat_audit.o
 
+ifneq ($(CONFIG_PPC_INDIRECT_IO),y)
+pci64-$(CONFIG_PPC64)           += iomap.o
+endif
+
 ifeq ($(CONFIG_PPC_ISERIES),y)
 $(obj)/head_64.o: $(obj)/lparmap.s
 AFLAGS_head_64.o += -I$(obj)
diff --git a/arch/powerpc/kernel/io.c b/arch/powerpc/kernel/io.c
index e98180686b35..c1aa07524c26 100644
--- a/arch/powerpc/kernel/io.c
+++ b/arch/powerpc/kernel/io.c
@@ -25,13 +25,11 @@
 #include <asm/firmware.h>
 #include <asm/bug.h>
 
-void _insb(volatile u8 __iomem *port, void *buf, long count)
+void _insb(const volatile u8 __iomem *port, void *buf, long count)
 {
         u8 *tbuf = buf;
         u8 tmp;
 
-        BUG_ON(firmware_has_feature(FW_FEATURE_ISERIES));
-
         if (unlikely(count <= 0))
                 return;
         asm volatile("sync");
@@ -48,8 +46,6 @@ void _outsb(volatile u8 __iomem *port, const void *buf, long count)
 {
         const u8 *tbuf = buf;
 
-        BUG_ON(firmware_has_feature(FW_FEATURE_ISERIES));
-
         if (unlikely(count <= 0))
                 return;
         asm volatile("sync");
@@ -60,13 +56,11 @@ void _outsb(volatile u8 __iomem *port, const void *buf, long count)
 }
 EXPORT_SYMBOL(_outsb);
 
-void _insw_ns(volatile u16 __iomem *port, void *buf, long count)
+void _insw_ns(const volatile u16 __iomem *port, void *buf, long count)
 {
         u16 *tbuf = buf;
         u16 tmp;
 
-        BUG_ON(firmware_has_feature(FW_FEATURE_ISERIES));
-
         if (unlikely(count <= 0))
                 return;
         asm volatile("sync");
@@ -83,8 +77,6 @@ void _outsw_ns(volatile u16 __iomem *port, const void *buf, long count)
 {
         const u16 *tbuf = buf;
 
-        BUG_ON(firmware_has_feature(FW_FEATURE_ISERIES));
-
         if (unlikely(count <= 0))
                 return;
         asm volatile("sync");
@@ -95,13 +87,11 @@ void _outsw_ns(volatile u16 __iomem *port, const void *buf, long count)
 }
 EXPORT_SYMBOL(_outsw_ns);
 
-void _insl_ns(volatile u32 __iomem *port, void *buf, long count)
+void _insl_ns(const volatile u32 __iomem *port, void *buf, long count)
 {
         u32 *tbuf = buf;
         u32 tmp;
 
-        BUG_ON(firmware_has_feature(FW_FEATURE_ISERIES));
-
         if (unlikely(count <= 0))
                 return;
         asm volatile("sync");
@@ -118,8 +108,6 @@ void _outsl_ns(volatile u32 __iomem *port, const void *buf, long count)
 {
         const u32 *tbuf = buf;
 
-        BUG_ON(firmware_has_feature(FW_FEATURE_ISERIES));
-
         if (unlikely(count <= 0))
                 return;
         asm volatile("sync");
diff --git a/arch/powerpc/kernel/pci_64.c b/arch/powerpc/kernel/pci_64.c
index d800e19ea564..afee470de924 100644
--- a/arch/powerpc/kernel/pci_64.c
+++ b/arch/powerpc/kernel/pci_64.c
@@ -1137,7 +1137,7 @@ int unmap_bus_range(struct pci_bus *bus)
         
         if (get_bus_io_range(bus, &start_phys, &start_virt, &size))
                 return 1;
-        if (iounmap_explicit((void __iomem *) start_virt, size))
+        if (__iounmap_explicit((void __iomem *) start_virt, size))
                 return 1;
 
         return 0;
diff --git a/arch/powerpc/kernel/setup_64.c b/arch/powerpc/kernel/setup_64.c
index f7ad64acf47e..f602a53b1b79 100644
--- a/arch/powerpc/kernel/setup_64.c
+++ b/arch/powerpc/kernel/setup_64.c
@@ -599,3 +599,10 @@ void __init setup_per_cpu_areas(void)
         }
 }
 #endif
+
+
+#ifdef CONFIG_PPC_INDIRECT_IO
+struct ppc_pci_io ppc_pci_io;
+EXPORT_SYMBOL(ppc_pci_io);
+#endif /* CONFIG_PPC_INDIRECT_IO */
+
diff --git a/arch/powerpc/mm/pgtable_64.c b/arch/powerpc/mm/pgtable_64.c
index ac64f4aaa509..e9b21846ccbd 100644
--- a/arch/powerpc/mm/pgtable_64.c
+++ b/arch/powerpc/mm/pgtable_64.c
@@ -129,22 +129,12 @@ static void __iomem * __ioremap_com(unsigned long addr, unsigned long pa,
         return (void __iomem *) (ea + (addr & ~PAGE_MASK));
 }
 
-
-void __iomem *
-ioremap(unsigned long addr, unsigned long size)
-{
-        return __ioremap(addr, size, _PAGE_NO_CACHE | _PAGE_GUARDED);
-}
-
 void __iomem * __ioremap(unsigned long addr, unsigned long size,
                          unsigned long flags)
 {
         unsigned long pa, ea;
         void __iomem *ret;
 
-        if (firmware_has_feature(FW_FEATURE_ISERIES))
-                return (void __iomem *)addr;
-
         /*
          * Choose an address to map it to.
          * Once the imalloc system is running, we use it.
@@ -178,6 +168,25 @@ void __iomem * __ioremap(unsigned long addr, unsigned long size,
         return ret;
 }
 
+
+void __iomem * ioremap(unsigned long addr, unsigned long size)
+{
+        unsigned long flags = _PAGE_NO_CACHE | _PAGE_GUARDED;
+
+        if (ppc_md.ioremap)
+                return ppc_md.ioremap(addr, size, flags);
+        return __ioremap(addr, size, flags);
+}
+
+void __iomem * ioremap_flags(unsigned long addr, unsigned long size,
+                             unsigned long flags)
+{
+        if (ppc_md.ioremap)
+                return ppc_md.ioremap(addr, size, flags);
+        return __ioremap(addr, size, flags);
+}
+
+
 #define IS_PAGE_ALIGNED(_val) ((_val) == ((_val) & PAGE_MASK))
 
 int __ioremap_explicit(unsigned long pa, unsigned long ea,
@@ -235,13 +244,10 @@ int __ioremap_explicit(unsigned long pa, unsigned long ea,
  *
  * XXX  what about calls before mem_init_done (ie python_countermeasures())
  */
-void iounmap(volatile void __iomem *token)
+void __iounmap(void __iomem *token)
 {
         void *addr;
 
-        if (firmware_has_feature(FW_FEATURE_ISERIES))
-                return;
-
         if (!mem_init_done)
                 return;
         
@@ -250,6 +256,14 @@ void iounmap(volatile void __iomem *token)
         im_free(addr);
 }
 
+void iounmap(void __iomem *token)
+{
+        if (ppc_md.iounmap)
+                ppc_md.iounmap(token);
+        else
+                __iounmap(token);
+}
+
 static int iounmap_subset_regions(unsigned long addr, unsigned long size)
 {
         struct vm_struct *area;
@@ -268,7 +282,7 @@ static int iounmap_subset_regions(unsigned long addr, unsigned long size)
         return 0;
 }
 
-int iounmap_explicit(volatile void __iomem *start, unsigned long size)
+int __iounmap_explicit(void __iomem *start, unsigned long size)
 {
         struct vm_struct *area;
         unsigned long addr;
@@ -303,8 +317,10 @@ int iounmap_explicit(volatile void __iomem *start, unsigned long size)
 }
 
 EXPORT_SYMBOL(ioremap);
+EXPORT_SYMBOL(ioremap_flags);
 EXPORT_SYMBOL(__ioremap);
 EXPORT_SYMBOL(iounmap);
+EXPORT_SYMBOL(__iounmap);
 
 void __iomem * reserve_phb_iospace(unsigned long size)
 {
diff --git a/arch/powerpc/platforms/iseries/pci.c b/arch/powerpc/platforms/iseries/pci.c
index a90ae42a7bc2..4a06d9c34986 100644
--- a/arch/powerpc/platforms/iseries/pci.c
+++ b/arch/powerpc/platforms/iseries/pci.c
@@ -156,53 +156,6 @@ static void pci_Log_Error(char *Error_Text, int Bus, int SubBus,
 }
 
 /*
- * iSeries_pcibios_init
- *
- * Description:
- *   This function checks for all possible system PCI host bridges that connect
- *   PCI buses.  The system hypervisor is queried as to the guest partition
- *   ownership status.  A pci_controller is built for any bus which is partially
- *   owned or fully owned by this guest partition.
- */
-void iSeries_pcibios_init(void)
-{
-        struct pci_controller *phb;
-        struct device_node *root = of_find_node_by_path("/");
-        struct device_node *node = NULL;
-
-        if (root == NULL) {
-                printk(KERN_CRIT "iSeries_pcibios_init: can't find root "
-                                "of device tree\n");
-                return;
-        }
-        while ((node = of_get_next_child(root, node)) != NULL) {
-                HvBusNumber bus;
-                const u32 *busp;
-
-                if ((node->type == NULL) || (strcmp(node->type, "pci") != 0))
-                        continue;
-
-                busp = get_property(node, "bus-range", NULL);
-                if (busp == NULL)
-                        continue;
-                bus = *busp;
-                printk("bus %d appears to exist\n", bus);
-                phb = pcibios_alloc_controller(node);
-                if (phb == NULL)
-                        continue;
-
-                phb->pci_mem_offset = phb->local_number = bus;
-                phb->first_busno = bus;
-                phb->last_busno = bus;
-                phb->ops = &iSeries_pci_ops;
-        }
-
-        of_node_put(root);
-
-        pci_devs_phb_init();
-}
-
-/*
  * iSeries_pci_final_fixup(void)
  */
 void __init iSeries_pci_final_fixup(void)
@@ -438,11 +391,7 @@ static inline struct device_node *xlate_iomm_address(
 /*
  * Read MM I/O Instructions for the iSeries
  * On MM I/O error, all ones are returned and iSeries_pci_IoError is cal
- * else, data is returned in big Endian format.
- *
- * iSeries_Read_Byte = Read Byte  ( 8 bit)
- * iSeries_Read_Word = Read Word  (16 bit)
- * iSeries_Read_Long = Read Long  (32 bit)
+ * else, data is returned in Big Endian format.
  */
 static u8 iSeries_Read_Byte(const volatile void __iomem *IoAddress)
 {
@@ -462,14 +411,15 @@ static u8 iSeries_Read_Byte(const volatile void __iomem *IoAddress)
                         num_printed = 0;
                 }
                 if (num_printed++ < 10)
-                        printk(KERN_ERR "iSeries_Read_Byte: invalid access at IO address %p\n", IoAddress);
+                        printk(KERN_ERR "iSeries_Read_Byte: invalid access at IO address %p\n",
+                               IoAddress);
                 return 0xff;
         }
         do {
                 HvCall3Ret16(HvCallPciBarLoad8, &ret, dsa, BarOffset, 0);
         } while (CheckReturnCode("RDB", DevNode, &retry, ret.rc) != 0);
 
-        return (u8)ret.value;
+        return ret.value;
 }
 
 static u16 iSeries_Read_Word(const volatile void __iomem *IoAddress)
@@ -490,7 +440,8 @@ static u16 iSeries_Read_Word(const volatile void __iomem *IoAddress)
                         num_printed = 0;
                 }
                 if (num_printed++ < 10)
-                        printk(KERN_ERR "iSeries_Read_Word: invalid access at IO address %p\n", IoAddress);
+                        printk(KERN_ERR "iSeries_Read_Word: invalid access at IO address %p\n",
+                               IoAddress);
                 return 0xffff;
         }
         do {
@@ -498,7 +449,7 @@ static u16 iSeries_Read_Word(const volatile void __iomem *IoAddress)
                                 BarOffset, 0);
         } while (CheckReturnCode("RDW", DevNode, &retry, ret.rc) != 0);
 
-        return swab16((u16)ret.value);
+        return ret.value;
 }
 
 static u32 iSeries_Read_Long(const volatile void __iomem *IoAddress)
@@ -519,7 +470,8 @@ static u32 iSeries_Read_Long(const volatile void __iomem *IoAddress)
                         num_printed = 0;
                 }
                 if (num_printed++ < 10)
-                        printk(KERN_ERR "iSeries_Read_Long: invalid access at IO address %p\n", IoAddress);
+                        printk(KERN_ERR "iSeries_Read_Long: invalid access at IO address %p\n",
+                               IoAddress);
                 return 0xffffffff;
         }
         do {
@@ -527,15 +479,12 @@ static u32 iSeries_Read_Long(const volatile void __iomem *IoAddress)
                                 BarOffset, 0);
         } while (CheckReturnCode("RDL", DevNode, &retry, ret.rc) != 0);
 
-        return swab32((u32)ret.value);
+        return ret.value;
 }
 
 /*
  * Write MM I/O Instructions for the iSeries
  *
- * iSeries_Write_Byte = Write Byte (8 bit)
- * iSeries_Write_Word = Write Word(16 bit)
- * iSeries_Write_Long = Write Long(32 bit)
  */
 static void iSeries_Write_Byte(u8 data, volatile void __iomem *IoAddress)
 {
@@ -581,11 +530,12 @@ static void iSeries_Write_Word(u16 data, volatile void __iomem *IoAddress)
                         num_printed = 0;
                 }
                 if (num_printed++ < 10)
-                        printk(KERN_ERR "iSeries_Write_Word: invalid access at IO address %p\n", IoAddress);
+                        printk(KERN_ERR "iSeries_Write_Word: invalid access at IO address %p\n",
+                               IoAddress);
                 return;
         }
         do {
-                rc = HvCall4(HvCallPciBarStore16, dsa, BarOffset, swab16(data), 0);
+                rc = HvCall4(HvCallPciBarStore16, dsa, BarOffset, data, 0);
         } while (CheckReturnCode("WWW", DevNode, &retry, rc) != 0);
 }
 
@@ -607,231 +557,221 @@ static void iSeries_Write_Long(u32 data, volatile void __iomem *IoAddress)
                         num_printed = 0;
                 }
                 if (num_printed++ < 10)
-                        printk(KERN_ERR "iSeries_Write_Long: invalid access at IO address %p\n", IoAddress);
+                        printk(KERN_ERR "iSeries_Write_Long: invalid access at IO address %p\n",
+                               IoAddress);
                 return;
         }
         do {
-                rc = HvCall4(HvCallPciBarStore32, dsa, BarOffset, swab32(data), 0);
+                rc = HvCall4(HvCallPciBarStore32, dsa, BarOffset, data, 0);
         } while (CheckReturnCode("WWL", DevNode, &retry, rc) != 0);
 }
 
-extern unsigned char __raw_readb(const volatile void __iomem *addr)
+static u8 iseries_readb(const volatile void __iomem *addr)
 {
-        BUG_ON(firmware_has_feature(FW_FEATURE_ISERIES));
-
-        return *(volatile unsigned char __force *)addr;
+        return iSeries_Read_Byte(addr);
 }
-EXPORT_SYMBOL(__raw_readb);
 
-extern unsigned short __raw_readw(const volatile void __iomem *addr)
+static u16 iseries_readw(const volatile void __iomem *addr)
 {
-        BUG_ON(firmware_has_feature(FW_FEATURE_ISERIES));
-
-        return *(volatile unsigned short __force *)addr;
+        return le16_to_cpu(iSeries_Read_Word(addr));
 }
-EXPORT_SYMBOL(__raw_readw);
 
-extern unsigned int __raw_readl(const volatile void __iomem *addr)
+static u32 iseries_readl(const volatile void __iomem *addr)
 {
-        BUG_ON(firmware_has_feature(FW_FEATURE_ISERIES));
-
-        return *(volatile unsigned int __force *)addr;
+        return le32_to_cpu(iSeries_Read_Long(addr));
 }
-EXPORT_SYMBOL(__raw_readl);
 
-extern unsigned long __raw_readq(const volatile void __iomem *addr)
+static u16 iseries_readw_be(const volatile void __iomem *addr)
 {
-        BUG_ON(firmware_has_feature(FW_FEATURE_ISERIES));
-
-        return *(volatile unsigned long __force *)addr;
+        return iSeries_Read_Word(addr);
 }
-EXPORT_SYMBOL(__raw_readq);
 
-extern void __raw_writeb(unsigned char v, volatile void __iomem *addr)
+static u32 iseries_readl_be(const volatile void __iomem *addr)
 {
-        BUG_ON(firmware_has_feature(FW_FEATURE_ISERIES));
-
-        *(volatile unsigned char __force *)addr = v;
+        return iSeries_Read_Long(addr);
 }
-EXPORT_SYMBOL(__raw_writeb);
 
-extern void __raw_writew(unsigned short v, volatile void __iomem *addr)
+static void iseries_writeb(u8 data, volatile void __iomem *addr)
 {
-        BUG_ON(firmware_has_feature(FW_FEATURE_ISERIES));
-
-        *(volatile unsigned short __force *)addr = v;
+        iSeries_Write_Byte(data, addr);
 }
-EXPORT_SYMBOL(__raw_writew);
 
-extern void __raw_writel(unsigned int v, volatile void __iomem *addr)
+static void iseries_writew(u16 data, volatile void __iomem *addr)
 {
-        BUG_ON(firmware_has_feature(FW_FEATURE_ISERIES));
-
-        *(volatile unsigned int __force *)addr = v;
+        iSeries_Write_Word(cpu_to_le16(data), addr);
 }
-EXPORT_SYMBOL(__raw_writel);
 
-extern void __raw_writeq(unsigned long v, volatile void __iomem *addr)
+static void iseries_writel(u32 data, volatile void __iomem *addr)
 {
-        BUG_ON(firmware_has_feature(FW_FEATURE_ISERIES));
-
-        *(volatile unsigned long __force *)addr = v;
+        iSeries_Write_Long(cpu_to_le32(data), addr);
 }
-EXPORT_SYMBOL(__raw_writeq);
 
-int in_8(const volatile unsigned char __iomem *addr)
+static void iseries_writew_be(u16 data, volatile void __iomem *addr)
 {
-        if (firmware_has_feature(FW_FEATURE_ISERIES))
-                return iSeries_Read_Byte(addr);
-        return __in_8(addr);
+        iSeries_Write_Word(data, addr);
 }
-EXPORT_SYMBOL(in_8);
 
-void out_8(volatile unsigned char __iomem *addr, int val)
+static void iseries_writel_be(u32 data, volatile void __iomem *addr)
 {
-        if (firmware_has_feature(FW_FEATURE_ISERIES))
-                iSeries_Write_Byte(val, addr);
-        else
-                __out_8(addr, val);
+        iSeries_Write_Long(data, addr);
 }
-EXPORT_SYMBOL(out_8);
 
-int in_le16(const volatile unsigned short __iomem *addr)
+static void iseries_readsb(const volatile void __iomem *addr, void *buf,
+                           unsigned long count)
 {
-        if (firmware_has_feature(FW_FEATURE_ISERIES))
-                return iSeries_Read_Word(addr);
-        return __in_le16(addr);
+        u8 *dst = buf;
+        while(count-- > 0)
+                *(dst++) = iSeries_Read_Byte(addr);
 }
-EXPORT_SYMBOL(in_le16);
 
-int in_be16(const volatile unsigned short __iomem *addr)
+static void iseries_readsw(const volatile void __iomem *addr, void *buf,
+                           unsigned long count)
 {
-        BUG_ON(firmware_has_feature(FW_FEATURE_ISERIES));
-
-        return __in_be16(addr);
+        u16 *dst = buf;
+        while(count-- > 0)
+                *(dst++) = iSeries_Read_Word(addr);
 }
-EXPORT_SYMBOL(in_be16);
 
-void out_le16(volatile unsigned short __iomem *addr, int val)
+static void iseries_readsl(const volatile void __iomem *addr, void *buf,
+                           unsigned long count)
 {
-        if (firmware_has_feature(FW_FEATURE_ISERIES))
-                iSeries_Write_Word(val, addr);
-        else
-                __out_le16(addr, val);
+        u32 *dst = buf;
+        while(count-- > 0)
+                *(dst++) = iSeries_Read_Long(addr);
 }
-EXPORT_SYMBOL(out_le16);
 
-void out_be16(volatile unsigned short __iomem *addr, int val)
+static void iseries_writesb(volatile void __iomem *addr, const void *buf,
+                            unsigned long count)
 {
-        BUG_ON(firmware_has_feature(FW_FEATURE_ISERIES));
-
-        __out_be16(addr, val);
+        const u8 *src = buf;
+        while(count-- > 0)
+                iSeries_Write_Byte(*(src++), addr);
 }
-EXPORT_SYMBOL(out_be16);
 
-unsigned in_le32(const volatile unsigned __iomem *addr)
+static void iseries_writesw(volatile void __iomem *addr, const void *buf,
+                            unsigned long count)
 {
-        if (firmware_has_feature(FW_FEATURE_ISERIES))
-                return iSeries_Read_Long(addr);
-        return __in_le32(addr);
+        const u16 *src = buf;
+        while(count-- > 0)
+                iSeries_Write_Word(*(src++), addr);
 }
-EXPORT_SYMBOL(in_le32);
 
-unsigned in_be32(const volatile unsigned __iomem *addr)
+static void iseries_writesl(volatile void __iomem *addr, const void *buf,
+                            unsigned long count)
 {
-        BUG_ON(firmware_has_feature(FW_FEATURE_ISERIES));
-
-        return __in_be32(addr);
+        const u32 *src = buf;
+        while(count-- > 0)
+                iSeries_Write_Long(*(src++), addr);
 }
-EXPORT_SYMBOL(in_be32);
 
-void out_le32(volatile unsigned __iomem *addr, int val)
+static void iseries_memset_io(volatile void __iomem *addr, int c,
+                              unsigned long n)
 {
-        if (firmware_has_feature(FW_FEATURE_ISERIES))
-                iSeries_Write_Long(val, addr);
-        else
-                __out_le32(addr, val);
-}
-EXPORT_SYMBOL(out_le32);
+        volatile char __iomem *d = addr;
 
-void out_be32(volatile unsigned __iomem *addr, int val)
-{
-        BUG_ON(firmware_has_feature(FW_FEATURE_ISERIES));
-
-        __out_be32(addr, val);
+        while (n-- > 0)
+                iSeries_Write_Byte(c, d++);
 }
-EXPORT_SYMBOL(out_be32);
 
-unsigned long in_le64(const volatile unsigned long __iomem *addr)
+static void iseries_memcpy_fromio(void *dest, const volatile void __iomem *src,
+                                  unsigned long n)
 {
-        BUG_ON(firmware_has_feature(FW_FEATURE_ISERIES));
+        char *d = dest;
+        const volatile char __iomem *s = src;
 
-        return __in_le64(addr);
+        while (n-- > 0)
+                *d++ = iSeries_Read_Byte(s++);
 }
-EXPORT_SYMBOL(in_le64);
 
-unsigned long in_be64(const volatile unsigned long __iomem *addr)
+static void iseries_memcpy_toio(volatile void __iomem *dest, const void *src,
+                                unsigned long n)
 {
-        BUG_ON(firmware_has_feature(FW_FEATURE_ISERIES));
+        const char *s = src;
+        volatile char __iomem *d = dest;
 
-        return __in_be64(addr);
+        while (n-- > 0)
+                iSeries_Write_Byte(*s++, d++);
 }
-EXPORT_SYMBOL(in_be64);
-
-void out_le64(volatile unsigned long __iomem *addr, unsigned long val)
-{
-        BUG_ON(firmware_has_feature(FW_FEATURE_ISERIES));
 
-        __out_le64(addr, val);
-}
-EXPORT_SYMBOL(out_le64);
+/* We only set MMIO ops. The default PIO ops will be default
+ * to the MMIO ops + pci_io_base which is 0 on iSeries as
+ * expected so both should work.
+ *
+ * Note that we don't implement the readq/writeq versions as
+ * I don't know of an HV call for doing so. Thus, the default
+ * operation will be used instead, which will fault a the value
+ * return by iSeries for MMIO addresses always hits a non mapped
+ * area. This is as good as the BUG() we used to have there.
+ */
+static struct ppc_pci_io __initdata iseries_pci_io = {
+        .readb = iseries_readb,
+        .readw = iseries_readw,
+        .readl = iseries_readl,
+        .readw_be = iseries_readw_be,
+        .readl_be = iseries_readl_be,
+        .writeb = iseries_writeb,
+        .writew = iseries_writew,
+        .writel = iseries_writel,
+        .writew_be = iseries_writew_be,
+        .writel_be = iseries_writel_be,
+        .readsb = iseries_readsb,
+        .readsw = iseries_readsw,
+        .readsl = iseries_readsl,
+        .writesb = iseries_writesb,
+        .writesw = iseries_writesw,
+        .writesl = iseries_writesl,
+        .memset_io = iseries_memset_io,
+        .memcpy_fromio = iseries_memcpy_fromio,
+        .memcpy_toio = iseries_memcpy_toio,
+};
 
-void out_be64(volatile unsigned long __iomem *addr, unsigned long val)
+/*
+ * iSeries_pcibios_init
+ *
+ * Description:
+ *   This function checks for all possible system PCI host bridges that connect
+ *   PCI buses.  The system hypervisor is queried as to the guest partition
+ *   ownership status.  A pci_controller is built for any bus which is partially
+ *   owned or fully owned by this guest partition.
+ */
+void __init iSeries_pcibios_init(void)
 {
-        BUG_ON(firmware_has_feature(FW_FEATURE_ISERIES));
+        struct pci_controller *phb;
+        struct device_node *root = of_find_node_by_path("/");
+        struct device_node *node = NULL;
 
-        __out_be64(addr, val);
-}
-EXPORT_SYMBOL(out_be64);
+        /* Install IO hooks */
+        ppc_pci_io = iseries_pci_io;
 
-void memset_io(volatile void __iomem *addr, int c, unsigned long n)
-{
-        if (firmware_has_feature(FW_FEATURE_ISERIES)) {
-                volatile char __iomem *d = addr;
+        if (root == NULL) {
+                printk(KERN_CRIT "iSeries_pcibios_init: can't find root "
+                                "of device tree\n");
+                return;
+        }
+        while ((node = of_get_next_child(root, node)) != NULL) {
+                HvBusNumber bus;
+                const u32 *busp;
 
-                while (n-- > 0) {
-                        iSeries_Write_Byte(c, d++);
-                }
-        } else
-                eeh_memset_io(addr, c, n);
-}
-EXPORT_SYMBOL(memset_io);
+                if ((node->type == NULL) || (strcmp(node->type, "pci") != 0))
+                        continue;
 
-void memcpy_fromio(void *dest, const volatile void __iomem *src,
-                                 unsigned long n)
-{
-        if (firmware_has_feature(FW_FEATURE_ISERIES)) {
-                char *d = dest;
-                const volatile char __iomem *s = src;
+                busp = get_property(node, "bus-range", NULL);
+                if (busp == NULL)
+                        continue;
+                bus = *busp;
+                printk("bus %d appears to exist\n", bus);
+                phb = pcibios_alloc_controller(node);
+                if (phb == NULL)
+                        continue;
 
-                while (n-- > 0) {
-                        *d++ = iSeries_Read_Byte(s++);
-                }
-        } else
-                eeh_memcpy_fromio(dest, src, n);
-}
-EXPORT_SYMBOL(memcpy_fromio);
+                phb->pci_mem_offset = phb->local_number = bus;
+                phb->first_busno = bus;
+                phb->last_busno = bus;
+                phb->ops = &iSeries_pci_ops;
+        }
 
-void memcpy_toio(volatile void __iomem *dest, const void *src, unsigned long n)
-{
-        if (firmware_has_feature(FW_FEATURE_ISERIES)) {
-                const char *s = src;
-                volatile char __iomem *d = dest;
+        of_node_put(root);
 
-                while (n-- > 0) {
-                        iSeries_Write_Byte(*s++, d++);
-                }
-        } else
-                eeh_memcpy_toio(dest, src, n);
+        pci_devs_phb_init();
 }
-EXPORT_SYMBOL(memcpy_toio);
+
diff --git a/arch/powerpc/platforms/iseries/setup.c b/arch/powerpc/platforms/iseries/setup.c
index cd8965ec9ddb..2f16d9330cfe 100644
--- a/arch/powerpc/platforms/iseries/setup.c
+++ b/arch/powerpc/platforms/iseries/setup.c
@@ -617,6 +617,16 @@ static void iseries_dedicated_idle(void)
 void __init iSeries_init_IRQ(void) { }
 #endif
 
+static void __iomem *iseries_ioremap(unsigned long address, unsigned long size,
+                                     unsigned long flags)
+{
+        return (void __iomem *)address;
+}
+
+static void iseries_iounmap(void __iomem *token)
+{
+}
+
 /*
  * iSeries has no legacy IO, anything calling this function has to
  * fail or bad things will happen
@@ -655,6 +665,8 @@ define_machine(iseries) {
         .progress       = iSeries_progress,
         .probe          = iseries_probe,
         .check_legacy_ioport    = iseries_check_legacy_ioport,
+        .ioremap        = iseries_ioremap,
+        .iounmap        = iseries_iounmap,
         /* XXX Implement enable_pmcs for iSeries */
 };