[POWERPC] Merge 32 and 64 bits asm-powerpc/io.h

powerpc: Merge 32 and 64 bits asm-powerpc/io.h

The rework on io.h done for the new hookable accessors made it easier,
so I just finished the work and merged 32 and 64 bits io.h for arch/powerpc.

arch/ppc still uses the old version in asm-ppc, there is just too much gunk
in there that I really can't be bothered trying to cleanup.

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

16 files changed, 367 insertions, 213 deletions

diff --git a/arch/powerpc/kernel/Makefile b/arch/powerpc/kernel/Makefile
index 600954df07ae..f9ce5d798de3 100644
--- a/arch/powerpc/kernel/Makefile
+++ b/arch/powerpc/kernel/Makefile
@@ -72,7 +72,7 @@ obj-$(CONFIG_AUDIT)		+= audit.o
 obj64-$(CONFIG_AUDIT)		+= compat_audit.o
 
 ifneq ($(CONFIG_PPC_INDIRECT_IO),y)
-pci64-$(CONFIG_PPC64)		+= iomap.o
+obj-y				+= iomap.o
 endif
 
 ifeq ($(CONFIG_PPC_ISERIES),y)
diff --git a/arch/powerpc/kernel/io.c b/arch/powerpc/kernel/io.c
index c1aa07524c26..34ae11494ddc 100644
--- a/arch/powerpc/kernel/io.c
+++ b/arch/powerpc/kernel/io.c
@@ -117,3 +117,90 @@ void _outsl_ns(volatile u32 __iomem *port, const void *buf, long count)
 	asm volatile("sync");
 }
 EXPORT_SYMBOL(_outsl_ns);
+
+#define IO_CHECK_ALIGN(v,a) ((((unsigned long)(v)) & ((a) - 1)) == 0)
+
+void _memset_io(volatile void __iomem *addr, int c, unsigned long n)
+{
+	void *p = (void __force *)addr;
+	u32 lc = c;
+	lc |= lc << 8;
+	lc |= lc << 16;
+
+	__asm__ __volatile__ ("sync" : : : "memory");
+	while(n && !IO_CHECK_ALIGN(p, 4)) {
+		*((volatile u8 *)p) = c;
+		p++;
+		n--;
+	}
+	while(n >= 4) {
+		*((volatile u32 *)p) = lc;
+		p += 4;
+		n -= 4;
+	}
+	while(n) {
+		*((volatile u8 *)p) = c;
+		p++;
+		n--;
+	}
+	__asm__ __volatile__ ("sync" : : : "memory");
+}
+EXPORT_SYMBOL(_memset_io);
+
+void _memcpy_fromio(void *dest, const volatile void __iomem *src,
+		    unsigned long n)
+{
+	void *vsrc = (void __force *) src;
+
+	__asm__ __volatile__ ("sync" : : : "memory");
+	while(n && (!IO_CHECK_ALIGN(vsrc, 4) || !IO_CHECK_ALIGN(dest, 4))) {
+		*((u8 *)dest) = *((volatile u8 *)vsrc);
+		__asm__ __volatile__ ("eieio" : : : "memory");
+		vsrc++;
+		dest++;
+		n--;
+	}
+	while(n > 4) {
+		*((u32 *)dest) = *((volatile u32 *)vsrc);
+		__asm__ __volatile__ ("eieio" : : : "memory");
+		vsrc += 4;
+		dest += 4;
+		n -= 4;
+	}
+	while(n) {
+		*((u8 *)dest) = *((volatile u8 *)vsrc);
+		__asm__ __volatile__ ("eieio" : : : "memory");
+		vsrc++;
+		dest++;
+		n--;
+	}
+	__asm__ __volatile__ ("sync" : : : "memory");
+}
+EXPORT_SYMBOL(_memcpy_fromio);
+
+void _memcpy_toio(volatile void __iomem *dest, const void *src, unsigned long n)
+{
+	void *vdest = (void __force *) dest;
+
+	__asm__ __volatile__ ("sync" : : : "memory");
+	while(n && (!IO_CHECK_ALIGN(vdest, 4) || !IO_CHECK_ALIGN(src, 4))) {
+		*((volatile u8 *)vdest) = *((u8 *)src);
+		src++;
+		vdest++;
+		n--;
+	}
+	while(n > 4) {
+		*((volatile u32 *)vdest) = *((volatile u32 *)src);
+		src += 4;
+		vdest += 4;
+		n-=4;
+	}
+	while(n) {
+		*((volatile u8 *)vdest) = *((u8 *)src);
+		src++;
+		vdest++;
+		n--;
+	}
+	__asm__ __volatile__ ("sync" : : : "memory");
+}
+EXPORT_SYMBOL(_memcpy_toio);
diff --git a/arch/powerpc/kernel/iomap.c b/arch/powerpc/kernel/iomap.c
index a13a93dfc655..c68113371050 100644
--- a/arch/powerpc/kernel/iomap.c
+++ b/arch/powerpc/kernel/iomap.c
@@ -106,7 +106,7 @@ EXPORT_SYMBOL(iowrite32_rep);
 
 void __iomem *ioport_map(unsigned long port, unsigned int len)
 {
-	return (void __iomem *) (port+pci_io_base);
+	return (void __iomem *) (port + _IO_BASE);
 }
 
 void ioport_unmap(void __iomem *addr)
diff --git a/arch/powerpc/kernel/pci_32.c b/arch/powerpc/kernel/pci_32.c
index 0ad101a5fc5e..b08238f30502 100644
--- a/arch/powerpc/kernel/pci_32.c
+++ b/arch/powerpc/kernel/pci_32.c
@@ -1561,7 +1561,7 @@ static struct resource *__pci_mmap_make_offset(struct pci_dev *dev,
 		*offset += hose->pci_mem_offset;
 		res_bit = IORESOURCE_MEM;
 	} else {
-		io_offset = hose->io_base_virt - ___IO_BASE;
+		io_offset = hose->io_base_virt - (void __iomem *)_IO_BASE;
 		*offset += io_offset;
 		res_bit = IORESOURCE_IO;
 	}
@@ -1816,7 +1816,8 @@ void pci_resource_to_user(const struct pci_dev *dev, int bar,
 		return;
 
 	if (rsrc->flags & IORESOURCE_IO)
-		offset = ___IO_BASE - hose->io_base_virt + hose->io_base_phys;
+		offset = (void __iomem *)_IO_BASE - hose->io_base_virt
+			+ hose->io_base_phys;
 
 	*start = rsrc->start + offset;
 	*end = rsrc->end + offset;
@@ -1835,35 +1836,6 @@ pci_init_resource(struct resource *res, unsigned long start, unsigned long end,
 	res->child = NULL;
 }
 
-void __iomem *pci_iomap(struct pci_dev *dev, int bar, unsigned long max)
-{
-	unsigned long start = pci_resource_start(dev, bar);
-	unsigned long len = pci_resource_len(dev, bar);
-	unsigned long flags = pci_resource_flags(dev, bar);
-
-	if (!len)
-		return NULL;
-	if (max && len > max)
-		len = max;
-	if (flags & IORESOURCE_IO)
-		return ioport_map(start, len);
-	if (flags & IORESOURCE_MEM)
-		/* Not checking IORESOURCE_CACHEABLE because PPC does
-		 * not currently distinguish between ioremap and
-		 * ioremap_nocache.
-		 */
-		return ioremap(start, len);
-	/* What? */
-	return NULL;
-}
-
-void pci_iounmap(struct pci_dev *dev, void __iomem *addr)
-{
-	/* Nothing to do */
-}
-EXPORT_SYMBOL(pci_iomap);
-EXPORT_SYMBOL(pci_iounmap);
-
 unsigned long pci_address_to_pio(phys_addr_t address)
 {
 	struct pci_controller* hose = hose_head;
diff --git a/arch/powerpc/kernel/rtas_pci.c b/arch/powerpc/kernel/rtas_pci.c
index 03cacc25a0ae..ace9f4c86e67 100644
--- a/arch/powerpc/kernel/rtas_pci.c
+++ b/arch/powerpc/kernel/rtas_pci.c
@@ -38,6 +38,7 @@
 #include <asm/rtas.h>
 #include <asm/mpic.h>
 #include <asm/ppc-pci.h>
+#include <asm/eeh.h>
 
 /* RTAS tokens */
 static int read_pci_config;
diff --git a/arch/powerpc/kernel/traps.c b/arch/powerpc/kernel/traps.c
index c66b4771ef44..0d4e203fa7a0 100644
--- a/arch/powerpc/kernel/traps.c
+++ b/arch/powerpc/kernel/traps.c
@@ -53,10 +53,6 @@
 #endif
 #include <asm/kexec.h>
 
-#ifdef CONFIG_PPC64	/* XXX */
-#define _IO_BASE	pci_io_base
-#endif
-
 #ifdef CONFIG_DEBUGGER
 int (*__debugger)(struct pt_regs *regs);
 int (*__debugger_ipi)(struct pt_regs *regs);
@@ -241,7 +237,7 @@ void system_reset_exception(struct pt_regs *regs)
  */
 static inline int check_io_access(struct pt_regs *regs)
 {
-#if defined(CONFIG_PPC_PMAC) && defined(CONFIG_PPC32)
+#ifdef CONFIG_PPC32
 	unsigned long msr = regs->msr;
 	const struct exception_table_entry *entry;
 	unsigned int *nip = (unsigned int *)regs->nip;
@@ -274,7 +270,7 @@ static inline int check_io_access(struct pt_regs *regs)
 			return 1;
 		}
 	}
-#endif /* CONFIG_PPC_PMAC && CONFIG_PPC32 */
+#endif /* CONFIG_PPC32 */
 	return 0;
 }
 
diff --git a/arch/powerpc/mm/pgtable_32.c b/arch/powerpc/mm/pgtable_32.c
index 7750c4425688..1891dbeeb8e9 100644
--- a/arch/powerpc/mm/pgtable_32.c
+++ b/arch/powerpc/mm/pgtable_32.c
@@ -149,6 +149,13 @@ ioremap(phys_addr_t addr, unsigned long size)
 EXPORT_SYMBOL(ioremap);
 
 void __iomem *
+ioremap_flags(phys_addr_t addr, unsigned long size, unsigned long flags)
+{
+	return __ioremap(addr, size, flags);
+}
+EXPORT_SYMBOL(ioremap_flags);
+
+void __iomem *
 __ioremap(phys_addr_t addr, unsigned long size, unsigned long flags)
 {
 	unsigned long v, i;
@@ -247,20 +254,7 @@ void iounmap(volatile void __iomem *addr)
 }
 EXPORT_SYMBOL(iounmap);
 
-void __iomem *ioport_map(unsigned long port, unsigned int len)
-{
-	return (void __iomem *) (port + _IO_BASE);
-}
-
-void ioport_unmap(void __iomem *addr)
-{
-	/* Nothing to do */
-}
-EXPORT_SYMBOL(ioport_map);
-EXPORT_SYMBOL(ioport_unmap);
-
-int
-map_page(unsigned long va, phys_addr_t pa, int flags)
+int map_page(unsigned long va, phys_addr_t pa, int flags)
 {
 	pmd_t *pd;
 	pte_t *pg;
diff --git a/arch/powerpc/mm/pgtable_64.c b/arch/powerpc/mm/pgtable_64.c
index e9b21846ccbd..16e4ee1c2318 100644
--- a/arch/powerpc/mm/pgtable_64.c
+++ b/arch/powerpc/mm/pgtable_64.c
@@ -113,7 +113,7 @@ static int map_io_page(unsigned long ea, unsigned long pa, int flags)
 }
 
 
-static void __iomem * __ioremap_com(unsigned long addr, unsigned long pa,
+static void __iomem * __ioremap_com(phys_addr_t addr, unsigned long pa,
 			    unsigned long ea, unsigned long size,
 			    unsigned long flags)
 {
@@ -129,7 +129,7 @@ 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,
+void __iomem * __ioremap(phys_addr_t addr, unsigned long size,
 			 unsigned long flags)
 {
 	unsigned long pa, ea;
@@ -169,7 +169,7 @@ void __iomem * __ioremap(unsigned long addr, unsigned long size,
 }
 
 
-void __iomem * ioremap(unsigned long addr, unsigned long size)
+void __iomem * ioremap(phys_addr_t addr, unsigned long size)
 {
 	unsigned long flags = _PAGE_NO_CACHE | _PAGE_GUARDED;
 
@@ -178,7 +178,7 @@ void __iomem * ioremap(unsigned long addr, unsigned long size)
 	return __ioremap(addr, size, flags);
 }
 
-void __iomem * ioremap_flags(unsigned long addr, unsigned long size,
+void __iomem * ioremap_flags(phys_addr_t addr, unsigned long size,
 			     unsigned long flags)
 {
 	if (ppc_md.ioremap)
@@ -189,7 +189,7 @@ void __iomem * ioremap_flags(unsigned long addr, unsigned long size,
 
 #define IS_PAGE_ALIGNED(_val) ((_val) == ((_val) & PAGE_MASK))
 
-int __ioremap_explicit(unsigned long pa, unsigned long ea,
+int __ioremap_explicit(phys_addr_t pa, unsigned long ea,
 		       unsigned long size, unsigned long flags)
 {
 	struct vm_struct *area;
@@ -244,7 +244,7 @@ int __ioremap_explicit(unsigned long pa, unsigned long ea,
  *
  * XXX	what about calls before mem_init_done (ie python_countermeasures())
  */
-void __iounmap(void __iomem *token)
+void __iounmap(volatile void __iomem *token)
 {
 	void *addr;
 
@@ -256,7 +256,7 @@ void __iounmap(void __iomem *token)
 	im_free(addr);
 }
 
-void iounmap(void __iomem *token)
+void iounmap(volatile void __iomem *token)
 {
 	if (ppc_md.iounmap)
 		ppc_md.iounmap(token);
@@ -282,7 +282,7 @@ static int iounmap_subset_regions(unsigned long addr, unsigned long size)
 	return 0;
 }
 
-int __iounmap_explicit(void __iomem *start, unsigned long size)
+int __iounmap_explicit(volatile void __iomem *start, unsigned long size)
 {
 	struct vm_struct *area;
 	unsigned long addr;
diff --git a/arch/powerpc/platforms/chrp/setup.c b/arch/powerpc/platforms/chrp/setup.c
index e6807d6d75bf..e1f51d455984 100644
--- a/arch/powerpc/platforms/chrp/setup.c
+++ b/arch/powerpc/platforms/chrp/setup.c
@@ -588,7 +588,6 @@ static int __init chrp_probe(void)
 	ISA_DMA_THRESHOLD = ~0L;
 	DMA_MODE_READ = 0x44;
 	DMA_MODE_WRITE = 0x48;
-	isa_io_base = CHRP_ISA_IO_BASE;		/* default value */
 
 	return 1;
 }
diff --git a/arch/powerpc/platforms/iseries/setup.c b/arch/powerpc/platforms/iseries/setup.c
index 2f16d9330cfe..0f39bdbbf917 100644
--- a/arch/powerpc/platforms/iseries/setup.c
+++ b/arch/powerpc/platforms/iseries/setup.c
@@ -617,13 +617,13 @@ static void iseries_dedicated_idle(void)
 void __init iSeries_init_IRQ(void) { }
 #endif
 
-static void __iomem *iseries_ioremap(unsigned long address, unsigned long size,
+static void __iomem *iseries_ioremap(phys_addr_t address, unsigned long size,
 				     unsigned long flags)
 {
 	return (void __iomem *)address;
 }
 
-static void iseries_iounmap(void __iomem *token)
+static void iseries_iounmap(volatile void __iomem *token)
 {
 }
 
diff --git a/arch/powerpc/platforms/powermac/setup.c b/arch/powerpc/platforms/powermac/setup.c
index 4ec6a5a65f30..d949e9df41ef 100644
--- a/arch/powerpc/platforms/powermac/setup.c
+++ b/arch/powerpc/platforms/powermac/setup.c
@@ -677,8 +677,6 @@ static int __init pmac_probe(void)
 
 #ifdef CONFIG_PPC32
 	/* isa_io_base gets set in pmac_pci_init */
-	isa_mem_base = PMAC_ISA_MEM_BASE;
-	pci_dram_offset = PMAC_PCI_DRAM_OFFSET;
 	ISA_DMA_THRESHOLD = ~0L;
 	DMA_MODE_READ = 1;
 	DMA_MODE_WRITE = 2;
diff --git a/include/asm-powerpc/eeh.h b/include/asm-powerpc/eeh.h
index 66481bbf270a..b886bec67016 100644
--- a/include/asm-powerpc/eeh.h
+++ b/include/asm-powerpc/eeh.h
@@ -169,104 +169,19 @@ static inline u64 eeh_readq_be(const volatile void __iomem *addr)
 	return val;
 }
 
-#define EEH_CHECK_ALIGN(v,a) \
-	((((unsigned long)(v)) & ((a) - 1)) == 0)
-
-static inline void eeh_memset_io(volatile void __iomem *addr, int c,
-				 unsigned long n)
-{
-	void *p = (void __force *)addr;
-	u32 lc = c;
-	lc |= lc << 8;
-	lc |= lc << 16;
-
-	__asm__ __volatile__ ("sync" : : : "memory");
-	while(n && !EEH_CHECK_ALIGN(p, 4)) {
-		*((volatile u8 *)p) = c;
-		p++;
-		n--;
-	}
-	while(n >= 4) {
-		*((volatile u32 *)p) = lc;
-		p += 4;
-		n -= 4;
-	}
-	while(n) {
-		*((volatile u8 *)p) = c;
-		p++;
-		n--;
-	}
-	__asm__ __volatile__ ("sync" : : : "memory");
-}
-static inline void eeh_memcpy_fromio(void *dest, const volatile void __iomem *src,
+static inline void eeh_memcpy_fromio(void *dest, const
+				     volatile void __iomem *src,
 				     unsigned long n)
 {
-	void *vsrc = (void __force *) src;
-	void *destsave = dest;
-	unsigned long nsave = n;
-
-	__asm__ __volatile__ ("sync" : : : "memory");
-	while(n && (!EEH_CHECK_ALIGN(vsrc, 4) || !EEH_CHECK_ALIGN(dest, 4))) {
-		*((u8 *)dest) = *((volatile u8 *)vsrc);
-		__asm__ __volatile__ ("eieio" : : : "memory");
-		vsrc++;
-		dest++;
-		n--;
-	}
-	while(n > 4) {
-		*((u32 *)dest) = *((volatile u32 *)vsrc);
-		__asm__ __volatile__ ("eieio" : : : "memory");
-		vsrc += 4;
-		dest += 4;
-		n -= 4;
-	}
-	while(n) {
-		*((u8 *)dest) = *((volatile u8 *)vsrc);
-		__asm__ __volatile__ ("eieio" : : : "memory");
-		vsrc++;
-		dest++;
-		n--;
-	}
-	__asm__ __volatile__ ("sync" : : : "memory");
+	_memcpy_fromio(dest, src, n);
 
 	/* Look for ffff's here at dest[n].  Assume that at least 4 bytes
 	 * were copied. Check all four bytes.
 	 */
-	if ((nsave >= 4) &&
-		(EEH_POSSIBLE_ERROR((*((u32 *) destsave+nsave-4)), u32))) {
-		eeh_check_failure(src, (*((u32 *) destsave+nsave-4)));
-	}
+	if (n >= 4 && EEH_POSSIBLE_ERROR(*((u32 *)(dest + n - 4)), u32))
+		eeh_check_failure(src, *((u32 *)(dest + n - 4)));
 }
 
-static inline void eeh_memcpy_toio(volatile void __iomem *dest, const void *src,
-				   unsigned long n)
-{
-	void *vdest = (void __force *) dest;
-
-	__asm__ __volatile__ ("sync" : : : "memory");
-	while(n && (!EEH_CHECK_ALIGN(vdest, 4) || !EEH_CHECK_ALIGN(src, 4))) {
-		*((volatile u8 *)vdest) = *((u8 *)src);
-		src++;
-		vdest++;
-		n--;
-	}
-	while(n > 4) {
-		*((volatile u32 *)vdest) = *((volatile u32 *)src);
-		src += 4;
-		vdest += 4;
-		n-=4;
-	}
-	while(n) {
-		*((volatile u8 *)vdest) = *((u8 *)src);
-		src++;
-		vdest++;
-		n--;
-	}
-	__asm__ __volatile__ ("sync" : : : "memory");
-}
-
-#undef EEH_CHECK_ALIGN
-
 /* in-string eeh macros */
 static inline void eeh_readsb(const volatile void __iomem *addr, void * buf,
 			      int ns)
diff --git a/include/asm-powerpc/ide.h b/include/asm-powerpc/ide.h
index 60a8fc429970..0f66f0f82c32 100644
--- a/include/asm-powerpc/ide.h
+++ b/include/asm-powerpc/ide.h
@@ -22,17 +22,10 @@
 #endif
 #endif
 
-#ifdef __powerpc64__
 #define __ide_mm_insw(p, a, c)	readsw((void __iomem *)(p), (a), (c))
 #define __ide_mm_insl(p, a, c)	readsl((void __iomem *)(p), (a), (c))
 #define __ide_mm_outsw(p, a, c)	writesw((void __iomem *)(p), (a), (c))
 #define __ide_mm_outsl(p, a, c)	writesl((void __iomem *)(p), (a), (c))
-#else
-#define __ide_mm_insw(p, a, c)	_insw_ns((volatile u16 __iomem *)(p), (a), (c))
-#define __ide_mm_insl(p, a, c)	_insl_ns((volatile u32 __iomem *)(p), (a), (c))
-#define __ide_mm_outsw(p, a, c)	_outsw_ns((volatile u16 __iomem *)(p), (a), (c))
-#define __ide_mm_outsl(p, a, c)	_outsl_ns((volatile u32 __iomem *)(p), (a), (c))
-#endif
 
 #ifndef  __powerpc64__
 #include <linux/hdreg.h>
diff --git a/include/asm-powerpc/io-defs.h b/include/asm-powerpc/io-defs.h
index 5a660f1130db..03691ab69217 100644
--- a/include/asm-powerpc/io-defs.h
+++ b/include/asm-powerpc/io-defs.h
@@ -3,17 +3,20 @@
 DEF_PCI_AC_RET(readb, u8, (const PCI_IO_ADDR addr), (addr))
 DEF_PCI_AC_RET(readw, u16, (const PCI_IO_ADDR addr), (addr))
 DEF_PCI_AC_RET(readl, u32, (const PCI_IO_ADDR addr), (addr))
-DEF_PCI_AC_RET(readq, u64, (const PCI_IO_ADDR addr), (addr))
 DEF_PCI_AC_RET(readw_be, u16, (const PCI_IO_ADDR addr), (addr))
 DEF_PCI_AC_RET(readl_be, u32, (const PCI_IO_ADDR addr), (addr))
-DEF_PCI_AC_RET(readq_be, u64, (const PCI_IO_ADDR addr), (addr))
 DEF_PCI_AC_NORET(writeb, (u8 val, PCI_IO_ADDR addr), (val, addr))
 DEF_PCI_AC_NORET(writew, (u16 val, PCI_IO_ADDR addr), (val, addr))
 DEF_PCI_AC_NORET(writel, (u32 val, PCI_IO_ADDR addr), (val, addr))
-DEF_PCI_AC_NORET(writeq, (u64 val, PCI_IO_ADDR addr), (val, addr))
 DEF_PCI_AC_NORET(writew_be, (u16 val, PCI_IO_ADDR addr), (val, addr))
 DEF_PCI_AC_NORET(writel_be, (u32 val, PCI_IO_ADDR addr), (val, addr))
+
+#ifdef __powerpc64__
+DEF_PCI_AC_RET(readq, u64, (const PCI_IO_ADDR addr), (addr))
+DEF_PCI_AC_RET(readq_be, u64, (const PCI_IO_ADDR addr), (addr))
+DEF_PCI_AC_NORET(writeq, (u64 val, PCI_IO_ADDR addr), (val, addr))
 DEF_PCI_AC_NORET(writeq_be, (u64 val, PCI_IO_ADDR addr), (val, addr))
+#endif /* __powerpc64__ */
 
 DEF_PCI_AC_RET(inb, u8, (unsigned long port), (port))
 DEF_PCI_AC_RET(inw, u16, (unsigned long port), (port))
diff --git a/include/asm-powerpc/io.h b/include/asm-powerpc/io.h
index 03e843fc1437..53bff8bd39b9 100644
--- a/include/asm-powerpc/io.h
+++ b/include/asm-powerpc/io.h
@@ -13,24 +13,51 @@
 extern int check_legacy_ioport(unsigned long base_port);
 #define PNPBIOS_BASE	0xf000	/* only relevant for PReP */
 
-#ifndef CONFIG_PPC64
-#include <asm-ppc/io.h>
-#else
-
 #include <linux/compiler.h>
 #include <asm/page.h>
 #include <asm/byteorder.h>
-#include <asm/paca.h>
 #include <asm/synch.h>
 #include <asm/delay.h>
+#include <asm/mmu.h>
 
 #include <asm-generic/iomap.h>
 
+#ifdef CONFIG_PPC64
+#include <asm/paca.h>
+#endif
+
 #define SIO_CONFIG_RA	0x398
 #define SIO_CONFIG_RD	0x399
 
 #define SLOW_DOWN_IO
 
+/* 32 bits uses slightly different variables for the various IO
+ * bases. Most of this file only uses _IO_BASE though which we
+ * define properly based on the platform
+ */
+#ifndef CONFIG_PCI
+#define _IO_BASE	0
+#define _ISA_MEM_BASE	0
+#define PCI_DRAM_OFFSET 0
+#elif defined(CONFIG_PPC32)
+#define _IO_BASE	isa_io_base
+#define _ISA_MEM_BASE	isa_mem_base
+#define PCI_DRAM_OFFSET	pci_dram_offset
+#else
+#define _IO_BASE	pci_io_base
+#define _ISA_MEM_BASE	0
+#define PCI_DRAM_OFFSET	0
+#endif
+
+extern unsigned long isa_io_base;
+extern unsigned long isa_mem_base;
+extern unsigned long pci_io_base;
+extern unsigned long pci_dram_offset;
+
+#if defined(CONFIG_PPC32) && defined(CONFIG_PPC_INDIRECT_IO)
+#error CONFIG_PPC_INDIRECT_IO is not yet supported on 32 bits
+#endif
+
 /*
  *
  * Low level MMIO accessors
@@ -53,7 +80,11 @@ extern int check_legacy_ioport(unsigned long base_port);
  *
  */
 
+#ifdef CONFIG_PPC64
 #define IO_SET_SYNC_FLAG()	do { get_paca()->io_sync = 1; } while(0)
+#else
+#define IO_SET_SYNC_FLAG()
+#endif
 
 #define DEF_MMIO_IN(name, type, insn)					\
 static inline type name(const volatile type __iomem *addr)		\
@@ -86,17 +117,19 @@ static inline void name(volatile type __iomem *addr, type val)		\
 DEF_MMIO_IN_BE(in_8,     8, lbz);
 DEF_MMIO_IN_BE(in_be16, 16, lhz);
 DEF_MMIO_IN_BE(in_be32, 32, lwz);
-DEF_MMIO_IN_BE(in_be64, 64, ld);
 DEF_MMIO_IN_LE(in_le16, 16, lhbrx);
 DEF_MMIO_IN_LE(in_le32, 32, lwbrx);
 
 DEF_MMIO_OUT_BE(out_8,     8, stb);
 DEF_MMIO_OUT_BE(out_be16, 16, sth);
 DEF_MMIO_OUT_BE(out_be32, 32, stw);
-DEF_MMIO_OUT_BE(out_be64, 64, std);
 DEF_MMIO_OUT_LE(out_le16, 16, sthbrx);
 DEF_MMIO_OUT_LE(out_le32, 32, stwbrx);
 
+#ifdef __powerpc64__
+DEF_MMIO_OUT_BE(out_be64, 64, std);
+DEF_MMIO_IN_BE(in_be64, 64, ld);
+
 /* There is no asm instructions for 64 bits reverse loads and stores */
 static inline u64 in_le64(const volatile u64 __iomem *addr)
 {
@@ -107,6 +140,7 @@ static inline void out_le64(volatile u64 __iomem *addr, u64 val)
 {
 	out_be64(addr, cpu_to_le64(val));
 }
+#endif /* __powerpc64__ */
 
 /*
  * Low level IO stream instructions are defined out of line for now
@@ -126,6 +160,17 @@ extern void _outsl_ns(volatile u32 __iomem *addr, const void *buf, long count);
 #define _outsw	_outsw_ns
 #define _outsl	_outsl_ns
 
+
+/*
+ * memset_io, memcpy_toio, memcpy_fromio base implementations are out of line
+ */
+
+extern void _memset_io(volatile void __iomem *addr, int c, unsigned long n);
+extern void _memcpy_fromio(void *dest, const volatile void __iomem *src,
+			   unsigned long n);
+extern void _memcpy_toio(volatile void __iomem *dest, const void *src,
+			 unsigned long n);
+
 /*
  *
  * PCI and standard ISA accessors
@@ -140,9 +185,6 @@ extern void _outsl_ns(volatile u32 __iomem *addr, const void *buf, long count);
  * of the accessors.
  */
 
-extern unsigned long isa_io_base;
-extern unsigned long pci_io_base;
-
 
 /*
  * Non ordered and non-swapping "raw" accessors
@@ -160,10 +202,6 @@ static inline unsigned int __raw_readl(const volatile void __iomem *addr)
 {
 	return *(volatile unsigned int __force *)addr;
 }
-static inline unsigned long __raw_readq(const volatile void __iomem *addr)
-{
-	return *(volatile unsigned long __force *)addr;
-}
 static inline void __raw_writeb(unsigned char v, volatile void __iomem *addr)
 {
 	*(volatile unsigned char __force *)addr = v;
@@ -176,11 +214,17 @@ static inline void __raw_writel(unsigned int v, volatile void __iomem *addr)
 {
 	*(volatile unsigned int __force *)addr = v;
 }
+
+#ifdef __powerpc64__
+static inline unsigned long __raw_readq(const volatile void __iomem *addr)
+{
+	return *(volatile unsigned long __force *)addr;
+}
 static inline void __raw_writeq(unsigned long v, volatile void __iomem *addr)
 {
 	*(volatile unsigned long __force *)addr = v;
 }
-
+#endif /* __powerpc64__ */
 
 /*
  *
@@ -188,7 +232,13 @@ static inline void __raw_writeq(unsigned long v, volatile void __iomem *addr)
  *
  */
 
+/*
+ * Include the EEH definitions when EEH is enabled only so they don't get
+ * in the way when building for 32 bits
+ */
+#ifdef CONFIG_EEH
 #include <asm/eeh.h>
+#endif
 
 /* Shortcut to the MMIO argument pointer */
 #define PCI_IO_ADDR	volatile void __iomem *
@@ -196,7 +246,7 @@ static inline void __raw_writeq(unsigned long v, volatile void __iomem *addr)
 /* Indirect IO address tokens:
  *
  * When CONFIG_PPC_INDIRECT_IO is set, the platform can provide hooks
- * on all IOs.
+ * on all IOs. (Note that this is all 64 bits only for now)
  *
  * To help platforms who may need to differenciate MMIO addresses in
  * their hooks, a bitfield is reserved for use by the platform near the
@@ -241,6 +291,70 @@ do {									\
 #define PCI_FIX_ADDR(addr) (addr)
 #endif
 
+/*
+ * On 32 bits, PIO operations have a recovery mechanism in case they trigger
+ * machine checks (which they occasionally do when probing non existing
+ * IO ports on some platforms, like PowerMac and 8xx).
+ * I always found it to be of dubious reliability and I am tempted to get
+ * rid of it one of these days. So if you think it's important to keep it,
+ * please voice up asap. We never had it for 64 bits and I do not intend
+ * to port it over
+ */
+
+#ifdef CONFIG_PPC32
+
+#define __do_in_asm(name, op)				\
+extern __inline__ unsigned int name(unsigned int port)	\
+{							\
+	unsigned int x;					\
+	__asm__ __volatile__(				\
+		"sync\n"				\
+		"0:"	op "	%0,0,%1\n"		\
+		"1:	twi	0,%0,0\n"		\
+		"2:	isync\n"			\
+		"3:	nop\n"				\
+		"4:\n"					\
+		".section .fixup,\"ax\"\n"		\
+		"5:	li	%0,-1\n"		\
+		"	b	4b\n"			\
+		".previous\n"				\
+		".section __ex_table,\"a\"\n"		\
+		"	.align	2\n"			\
+		"	.long	0b,5b\n"		\
+		"	.long	1b,5b\n"		\
+		"	.long	2b,5b\n"		\
+		"	.long	3b,5b\n"		\
+		".previous"				\
+		: "=&r" (x)				\
+		: "r" (port + _IO_BASE));		\
+	return x;					\
+}
+
+#define __do_out_asm(name, op)				\
+extern __inline__ void name(unsigned int val, unsigned int port) \
+{							\
+	__asm__ __volatile__(				\
+		"sync\n"				\
+		"0:" op " %0,0,%1\n"			\
+		"1:	sync\n"				\
+		"2:\n"					\
+		".section __ex_table,\"a\"\n"		\
+		"	.align	2\n"			\
+		"	.long	0b,2b\n"		\
+		"	.long	1b,2b\n"		\
+		".previous"				\
+		: : "r" (val), "r" (port + _IO_BASE));	\
+}
+
+__do_in_asm(_rec_inb, "lbzx")
+__do_in_asm(_rec_inw, "lhbrx")
+__do_in_asm(_rec_inl, "lwbrx")
+__do_out_asm(_rec_outb, "stbx")
+__do_out_asm(_rec_outw, "sthbrx")
+__do_out_asm(_rec_outl, "stwbrx")
+
+#endif /* CONFIG_PPC32 */
+
 /* The "__do_*" operations below provide the actual "base" implementation
  * for each of the defined acccessor. Some of them use the out_* functions
  * directly, some of them still use EEH, though we might change that in the
@@ -263,6 +377,8 @@ do {									\
 #define __do_writew_be(val, addr) out_be16(PCI_FIX_ADDR(addr), val)
 #define __do_writel_be(val, addr) out_be32(PCI_FIX_ADDR(addr), val)
 #define __do_writeq_be(val, addr) out_be64(PCI_FIX_ADDR(addr), val)
+
+#ifdef CONFIG_EEH
 #define __do_readb(addr)	eeh_readb(PCI_FIX_ADDR(addr))
 #define __do_readw(addr)	eeh_readw(PCI_FIX_ADDR(addr))
 #define __do_readl(addr)	eeh_readl(PCI_FIX_ADDR(addr))
@@ -270,33 +386,64 @@ do {									\
 #define __do_readw_be(addr)	eeh_readw_be(PCI_FIX_ADDR(addr))
 #define __do_readl_be(addr)	eeh_readl_be(PCI_FIX_ADDR(addr))
 #define __do_readq_be(addr)	eeh_readq_be(PCI_FIX_ADDR(addr))
-
-#define __do_outb(val, port)	writeb(val,(PCI_IO_ADDR)pci_io_base+port);
-#define __do_outw(val, port)	writew(val,(PCI_IO_ADDR)pci_io_base+port);
-#define __do_outl(val, port)	writel(val,(PCI_IO_ADDR)pci_io_base+port);
-#define __do_inb(port)		readb((PCI_IO_ADDR)pci_io_base + port);
-#define __do_inw(port)		readw((PCI_IO_ADDR)pci_io_base + port);
-#define __do_inl(port)		readl((PCI_IO_ADDR)pci_io_base + port);
-
+#else /* CONFIG_EEH */
+#define __do_readb(addr)	in_8(PCI_FIX_ADDR(addr))
+#define __do_readw(addr)	in_le16(PCI_FIX_ADDR(addr))
+#define __do_readl(addr)	in_le32(PCI_FIX_ADDR(addr))
+#define __do_readq(addr)	in_le64(PCI_FIX_ADDR(addr))
+#define __do_readw_be(addr)	in_be16(PCI_FIX_ADDR(addr))
+#define __do_readl_be(addr)	in_be32(PCI_FIX_ADDR(addr))
+#define __do_readq_be(addr)	in_be64(PCI_FIX_ADDR(addr))
+#endif /* !defined(CONFIG_EEH) */
+
+#ifdef CONFIG_PPC32
+#define __do_outb(val, port)	_rec_outb(val, port)
+#define __do_outw(val, port)	_rec_outw(val, port)
+#define __do_outl(val, port)	_rec_outl(val, port)
+#define __do_inb(port)		_rec_inb(port)
+#define __do_inw(port)		_rec_inw(port)
+#define __do_inl(port)		_rec_inl(port)
+#else /* CONFIG_PPC32 */
+#define __do_outb(val, port)	writeb(val,(PCI_IO_ADDR)_IO_BASE+port);
+#define __do_outw(val, port)	writew(val,(PCI_IO_ADDR)_IO_BASE+port);
+#define __do_outl(val, port)	writel(val,(PCI_IO_ADDR)_IO_BASE+port);
+#define __do_inb(port)		readb((PCI_IO_ADDR)_IO_BASE + port);
+#define __do_inw(port)		readw((PCI_IO_ADDR)_IO_BASE + port);
+#define __do_inl(port)		readl((PCI_IO_ADDR)_IO_BASE + port);
+#endif /* !CONFIG_PPC32 */
+
+#ifdef CONFIG_EEH
 #define __do_readsb(a, b, n)	eeh_readsb(PCI_FIX_ADDR(a), (b), (n))
 #define __do_readsw(a, b, n)	eeh_readsw(PCI_FIX_ADDR(a), (b), (n))
 #define __do_readsl(a, b, n)	eeh_readsl(PCI_FIX_ADDR(a), (b), (n))
+#else /* CONFIG_EEH */
+#define __do_readsb(a, b, n)	_insb(PCI_FIX_ADDR(a), (b), (n))
+#define __do_readsw(a, b, n)	_insw(PCI_FIX_ADDR(a), (b), (n))
+#define __do_readsl(a, b, n)	_insl(PCI_FIX_ADDR(a), (b), (n))
+#endif /* !CONFIG_EEH */
 #define __do_writesb(a, b, n)	_outsb(PCI_FIX_ADDR(a),(b),(n))
 #define __do_writesw(a, b, n)	_outsw(PCI_FIX_ADDR(a),(b),(n))
 #define __do_writesl(a, b, n)	_outsl(PCI_FIX_ADDR(a),(b),(n))
 
-#define __do_insb(p, b, n)	readsb((PCI_IO_ADDR)pci_io_base+(p), (b), (n))
-#define __do_insw(p, b, n)	readsw((PCI_IO_ADDR)pci_io_base+(p), (b), (n))
-#define __do_insl(p, b, n)	readsl((PCI_IO_ADDR)pci_io_base+(p), (b), (n))
-#define __do_outsb(p, b, n)	writesb((PCI_IO_ADDR)pci_io_base+(p),(b),(n))
-#define __do_outsw(p, b, n)	writesw((PCI_IO_ADDR)pci_io_base+(p),(b),(n))
-#define __do_outsl(p, b, n)	writesl((PCI_IO_ADDR)pci_io_base+(p),(b),(n))
-
-#define __do_memset_io(addr, c, n)	eeh_memset_io(PCI_FIX_ADDR(addr), c, n)
-#define __do_memcpy_fromio(dst, src, n)	eeh_memcpy_fromio(dst, \
-						PCI_FIX_ADDR(src), n)
-#define __do_memcpy_toio(dst, src, n)	eeh_memcpy_toio(PCI_FIX_ADDR(dst), \
-						src, n)
+#define __do_insb(p, b, n)	readsb((PCI_IO_ADDR)_IO_BASE+(p), (b), (n))
+#define __do_insw(p, b, n)	readsw((PCI_IO_ADDR)_IO_BASE+(p), (b), (n))
+#define __do_insl(p, b, n)	readsl((PCI_IO_ADDR)_IO_BASE+(p), (b), (n))
+#define __do_outsb(p, b, n)	writesb((PCI_IO_ADDR)_IO_BASE+(p),(b),(n))
+#define __do_outsw(p, b, n)	writesw((PCI_IO_ADDR)_IO_BASE+(p),(b),(n))
+#define __do_outsl(p, b, n)	writesl((PCI_IO_ADDR)_IO_BASE+(p),(b),(n))
+
+#define __do_memset_io(addr, c, n)	\
+				_memset_io(PCI_FIX_ADDR(addr), c, n)
+#define __do_memcpy_toio(dst, src, n)	\
+				_memcpy_toio(PCI_FIX_ADDR(dst), src, n)
+
+#ifdef CONFIG_EEH
+#define __do_memcpy_fromio(dst, src, n)	\
+				eeh_memcpy_fromio(dst, PCI_FIX_ADDR(src), n)
+#else /* CONFIG_EEH */
+#define __do_memcpy_fromio(dst, src, n)	\
+				_memcpy_fromio(dst,PCI_FIX_ADDR(src),n)
+#endif /* !CONFIG_EEH */
 
 #ifdef CONFIG_PPC_INDIRECT_IO
 #define DEF_PCI_HOOK(x)		x
@@ -343,15 +490,27 @@ static inline void name at					\
 /* Some drivers check for the presence of readq & writeq with
  * a #ifdef, so we make them happy here.
  */
+#ifdef __powerpc64__
 #define readq	readq
 #define writeq	writeq
+#endif
+
+#ifdef CONFIG_NOT_COHERENT_CACHE
 
-/* Nothing to do for cache stuff x*/
+#define dma_cache_inv(_start,_size) \
+	invalidate_dcache_range(_start, (_start + _size))
+#define dma_cache_wback(_start,_size) \
+	clean_dcache_range(_start, (_start + _size))
+#define dma_cache_wback_inv(_start,_size) \
+	flush_dcache_range(_start, (_start + _size))
+
+#else /* CONFIG_NOT_COHERENT_CACHE */
 
 #define dma_cache_inv(_start,_size)		do { } while (0)
 #define dma_cache_wback(_start,_size)		do { } while (0)
 #define dma_cache_wback_inv(_start,_size)	do { } while (0)
 
+#endif /* !CONFIG_NOT_COHERENT_CACHE */
 
 /*
  * Convert a physical pointer to a virtual kernel pointer for /dev/mem
@@ -372,6 +531,9 @@ static inline void name at					\
 #define readl_relaxed(addr) readl(addr)
 #define readq_relaxed(addr) readq(addr)
 
+#ifdef CONFIG_PPC32
+#define mmiowb()
+#else
 /*
  * Enforce synchronisation of stores vs. spin_unlock
  * (this does it explicitely, though our implementation of spin_unlock
@@ -385,6 +547,7 @@ static inline void mmiowb(void)
 	: "=&r" (tmp) : "i" (offsetof(struct paca_struct, io_sync))
 	: "memory");
 }
+#endif /* !CONFIG_PPC32 */
 
 static inline void iosync(void)
 {
@@ -453,22 +616,29 @@ static inline void iosync(void)
  *   be hooked (but can be used by a hook on iounmap)
  *
  */
-extern void __iomem *ioremap(unsigned long address, unsigned long size);
-extern void __iomem *ioremap_flags(unsigned long address, unsigned long size,
+extern void __iomem *ioremap(phys_addr_t address, unsigned long size);
+extern void __iomem *ioremap_flags(phys_addr_t address, unsigned long size,
 				   unsigned long flags);
 #define ioremap_nocache(addr, size)	ioremap((addr), (size))
-extern void iounmap(void __iomem *addr);
+extern void iounmap(volatile void __iomem *addr);
 
-extern void __iomem *__ioremap(unsigned long address, unsigned long size,
+extern void __iomem *__ioremap(phys_addr_t, unsigned long size,
 			       unsigned long flags);
-extern void __iounmap(void __iomem *addr);
+extern void __iounmap(volatile void __iomem *addr);
 
-extern int __ioremap_explicit(unsigned long p_addr, unsigned long v_addr,
+extern int __ioremap_explicit(phys_addr_t p_addr, unsigned long v_addr,
 		     	      unsigned long size, unsigned long flags);
-extern int __iounmap_explicit(void __iomem *start, unsigned long size);
+extern int __iounmap_explicit(volatile void __iomem *start,
+			      unsigned long size);
 
 extern void __iomem * reserve_phb_iospace(unsigned long size);
 
+/* Those are more 32 bits only functions */
+extern unsigned long iopa(unsigned long addr);
+extern unsigned long mm_ptov(unsigned long addr) __attribute_const__;
+extern void io_block_mapping(unsigned long virt, phys_addr_t phys,
+			     unsigned int size, int flags);
+
 
 /*
  * When CONFIG_PPC_INDIRECT_IO is set, we use the generic iomap implementation
@@ -538,7 +708,33 @@ static inline void * phys_to_virt(unsigned long address)
  */
 #define BIO_VMERGE_BOUNDARY	0
 
+/*
+ * 32 bits still uses virt_to_bus() for it's implementation of DMA
+ * mappings se we have to keep it defined here. We also have some old
+ * drivers (shame shame shame) that use bus_to_virt() and haven't been
+ * fixed yet so I need to define it here.
+ */
+#ifdef CONFIG_PPC32
+
+static inline unsigned long virt_to_bus(volatile void * address)
+{
+        if (address == NULL)
+		return 0;
+        return __pa(address) + PCI_DRAM_OFFSET;
+}
+
+static inline void * bus_to_virt(unsigned long address)
+{
+        if (address == 0)
+		return NULL;
+        return __va(address - PCI_DRAM_OFFSET);
+}
+
+#define page_to_bus(page)	(page_to_phys(page) + PCI_DRAM_OFFSET)
+
+#endif /* CONFIG_PPC32 */
+
+
 #endif /* __KERNEL__ */
 
-#endif /* CONFIG_PPC64 */
 #endif /* _ASM_POWERPC_IO_H */
diff --git a/include/asm-powerpc/machdep.h b/include/asm-powerpc/machdep.h
index 8c1a2dfe5cc7..1b04e5723548 100644
--- a/include/asm-powerpc/machdep.h
+++ b/include/asm-powerpc/machdep.h
@@ -88,9 +88,9 @@ struct machdep_calls {
 	void		(*pci_dma_dev_setup)(struct pci_dev *dev);
 	void		(*pci_dma_bus_setup)(struct pci_bus *bus);
 
-	void __iomem *	(*ioremap)(unsigned long addr, unsigned long size,
+	void __iomem *	(*ioremap)(phys_addr_t addr, unsigned long size,
 				   unsigned long flags);
-	void		(*iounmap)(void __iomem *token);
+	void		(*iounmap)(volatile void __iomem *token);
 #endif /* CONFIG_PPC64 */
 
 	int		(*probe)(void);