powerpc: Merge arch/ppc64/mm to arch/powerpc/mm

This moves the remaining files in arch/ppc64/mm to arch/powerpc/mm,
and arranges that we use them when compiling with ARCH=ppc64.
Signed-off-by: Paul Mackerras <paulus@samba.org>

arch/powerpc/mm/Makefile

@@ -5,8 +5,14 @@
 obj-y				:= fault.o mem.o lmb.o
 obj-$(CONFIG_PPC32)		+= init_32.o pgtable_32.o mmu_context_32.o \
 				   tlb_32.o
-obj-$(CONFIG_PPC64)		+= init_64.o pgtable_64.o mmu_context_64.o
+hash-$(CONFIG_PPC_MULTIPLATFORM) := hash_native_64.o
+obj-$(CONFIG_PPC64)		+= init_64.o pgtable_64.o mmu_context_64.o \
+				   hash_utils_64.o hash_low_64.o tlb_64.o \
+				   slb_low.o slb.o stab.o mmap.o imalloc.o \
+				   $(hash-y)
 obj-$(CONFIG_PPC_STD_MMU_32)	+= ppc_mmu_32.o hash_low_32.o
 obj-$(CONFIG_40x)		+= 4xx_mmu.o
 obj-$(CONFIG_44x)		+= 44x_mmu.o
 obj-$(CONFIG_FSL_BOOKE)		+= fsl_booke_mmu.o
+obj-$(CONFIG_NEED_MULTIPLE_NODES) += numa.o
+obj-$(CONFIG_HUGETLB_PAGE)	+= hugetlbpage.o

arch/ppc64/mm/hash_low.S → arch/powerpc/mm/hash_low_64.S

@@ -10,7 +10,7 @@
  * described in the kernel's COPYING file.
  */
 
-#include <asm/processor.h>
+#include <asm/reg.h>
 #include <asm/pgtable.h>
 #include <asm/mmu.h>
 #include <asm/page.h>

arch/ppc64/mm/hash_utils.c → arch/powerpc/mm/hash_utils_64.c

@@ -78,7 +78,7 @@ extern unsigned long dart_tablebase;
 hpte_t *htab_address;
 unsigned long htab_hash_mask;
 
-extern unsigned long _SDR1;
+unsigned long _SDR1;
 
 #define KB (1024)
 #define MB (1024*KB)

arch/powerpc/mm/init_64.c

@@ -73,18 +73,8 @@
 #warning TASK_SIZE is smaller than it needs to be.
 #endif
 
-int mem_init_done;
-unsigned long ioremap_bot = IMALLOC_BASE;
-static unsigned long phbs_io_bot = PHBS_IO_BASE;
-
-extern pgd_t swapper_pg_dir[];
-extern struct task_struct *current_set[NR_CPUS];
-
 unsigned long klimit = (unsigned long)_end;
 
-unsigned long _SDR1=0;
-unsigned long _ASR=0;
-
 /* max amount of RAM to use */
 unsigned long __max_memory;
 
@@ -193,19 +183,6 @@ static int __init setup_kcore(void)
 }
 module_init(setup_kcore);
 
-void __iomem * reserve_phb_iospace(unsigned long size)
-{
-	void __iomem *virt_addr;
-		
-	if (phbs_io_bot >= IMALLOC_BASE) 
-		panic("reserve_phb_iospace(): phb io space overflow\n");
-			
-	virt_addr = (void __iomem *) phbs_io_bot;
-	phbs_io_bot += size;
-
-	return virt_addr;
-}
-
 static void zero_ctor(void *addr, kmem_cache_t *cache, unsigned long flags)
 {
 	memset(addr, 0, kmem_cache_size(cache));
@@ -244,16 +221,3 @@ void pgtable_cache_init(void)
 			      name);
 	}
 }
-
-pgprot_t phys_mem_access_prot(struct file *file, unsigned long addr,
-			      unsigned long size, pgprot_t vma_prot)
-{
-	if (ppc_md.phys_mem_access_prot)
-		return ppc_md.phys_mem_access_prot(file, addr, size, vma_prot);
-
-	if (!page_is_ram(addr >> PAGE_SHIFT))
-		vma_prot = __pgprot(pgprot_val(vma_prot)
-				    | _PAGE_GUARDED | _PAGE_NO_CACHE);
-	return vma_prot;
-}
-EXPORT_SYMBOL(phys_mem_access_prot);

arch/powerpc/mm/mem.c

@@ -47,6 +47,9 @@
 #include <asm/prom.h>
 #include <asm/lmb.h>
 #include <asm/sections.h>
+#ifdef CONFIG_PPC64
+#include <asm/vdso.h>
+#endif
 
 #include "mmu_decl.h"
 
@@ -334,7 +337,7 @@ void flush_dcache_icache_page(struct page *page)
 	void *start = kmap_atomic(page, KM_PPC_SYNC_ICACHE);
 	__flush_dcache_icache(start);
 	kunmap_atomic(start, KM_PPC_SYNC_ICACHE);
-#elif defined(CONFIG_8xx)
+#elif defined(CONFIG_8xx) || defined(CONFIG_PPC64)
 	/* On 8xx there is no need to kmap since highmem is not supported */
 	__flush_dcache_icache(page_address(page)); 
 #else
@@ -463,18 +466,18 @@ void update_mmu_cache(struct vm_area_struct *vma, unsigned long address,
 	if (pgdir == NULL)
 		return;
 
-	ptep = find_linux_pte(pgdir, ea);
+	ptep = find_linux_pte(pgdir, address);
 	if (!ptep)
 		return;
 
-	vsid = get_vsid(vma->vm_mm->context.id, ea);
+	vsid = get_vsid(vma->vm_mm->context.id, address);
 
 	local_irq_save(flags);
 	tmp = cpumask_of_cpu(smp_processor_id());
 	if (cpus_equal(vma->vm_mm->cpu_vm_mask, tmp))
 		local = 1;
 
-	__hash_page(ea, pte_val(pte) & (_PAGE_USER|_PAGE_RW), vsid, ptep,
+	__hash_page(address, pte_val(pte) & (_PAGE_USER|_PAGE_RW), vsid, ptep,
 		    0x300, local);
 	local_irq_restore(flags);
 #endif

arch/powerpc/mm/mmu_decl.h

@@ -22,11 +22,11 @@
 #include <asm/tlbflush.h>
 #include <asm/mmu.h>
 
+#ifdef CONFIG_PPC32
 extern void mapin_ram(void);
 extern int map_page(unsigned long va, phys_addr_t pa, int flags);
 extern void setbat(int index, unsigned long virt, unsigned long phys,
 		   unsigned int size, int flags);
-extern void reserve_phys_mem(unsigned long start, unsigned long size);
 extern void settlbcam(int index, unsigned long virt, phys_addr_t phys,
 		      unsigned int size, int flags, unsigned int pid);
 extern void invalidate_tlbcam_entry(int index);
@@ -36,16 +36,16 @@ extern unsigned long ioremap_base;
 extern unsigned long ioremap_bot;
 extern unsigned int rtas_data, rtas_size;
 
-extern unsigned long __max_low_memory;
-extern unsigned long __initial_memory_limit;
-extern unsigned long total_memory;
-extern unsigned long total_lowmem;
-extern int mem_init_done;
-
 extern PTE *Hash, *Hash_end;
 extern unsigned long Hash_size, Hash_mask;
 
 extern unsigned int num_tlbcam_entries;
+#endif
+
+extern unsigned long __max_low_memory;
+extern unsigned long __initial_memory_limit;
+extern unsigned long total_memory;
+extern unsigned long total_lowmem;
 
 /* ...and now those things that may be slightly different between processor
  * architectures.  -- Dan
@@ -66,8 +66,8 @@ extern void MMU_init_hw(void);
 extern unsigned long mmu_mapin_ram(void);
 extern void adjust_total_lowmem(void);
 
-#else
-/* anything except 4xx or 8xx */
+#elif defined(CONFIG_PPC32)
+/* anything 32-bit except 4xx or 8xx */
 extern void MMU_init_hw(void);
 extern unsigned long mmu_mapin_ram(void);
 

arch/powerpc/mm/pgtable_64.c

@@ -67,30 +67,9 @@
 #include <asm/vdso.h>
 #include <asm/imalloc.h>
 
-#if PGTABLE_RANGE > USER_VSID_RANGE
-#warning Limited user VSID range means pagetable space is wasted
-#endif
-
-#if (TASK_SIZE_USER64 < PGTABLE_RANGE) && (TASK_SIZE_USER64 < USER_VSID_RANGE)
-#warning TASK_SIZE is smaller than it needs to be.
-#endif
-
-int mem_init_done;
 unsigned long ioremap_bot = IMALLOC_BASE;
 static unsigned long phbs_io_bot = PHBS_IO_BASE;
 
-extern pgd_t swapper_pg_dir[];
-extern struct task_struct *current_set[NR_CPUS];
-
-unsigned long klimit = (unsigned long)_end;
-
-/* max amount of RAM to use */
-unsigned long __max_memory;
-
-/* info on what we think the IO hole is */
-unsigned long 	io_hole_start;
-unsigned long	io_hole_size;
-
 #ifdef CONFIG_PPC_ISERIES
 
 void __iomem *ioremap(unsigned long addr, unsigned long size)
@@ -355,3 +334,16 @@ int iounmap_explicit(volatile void __iomem *start, unsigned long size)
 EXPORT_SYMBOL(ioremap);
 EXPORT_SYMBOL(__ioremap);
 EXPORT_SYMBOL(iounmap);
+
+void __iomem * reserve_phb_iospace(unsigned long size)
+{
+	void __iomem *virt_addr;
+		
+	if (phbs_io_bot >= IMALLOC_BASE) 
+		panic("reserve_phb_iospace(): phb io space overflow\n");
+			
+	virt_addr = (void __iomem *) phbs_io_bot;
+	phbs_io_bot += size;
+
+	return virt_addr;
+}

arch/ppc64/Makefile

@@ -83,7 +83,7 @@ head-y := arch/ppc64/kernel/head.o
 
 libs-y				+= arch/ppc64/lib/
 core-y				+= arch/ppc64/kernel/ arch/powerpc/kernel/
-core-y				+= arch/ppc64/mm/
+core-y				+= arch/powerpc/mm/
 core-y				+= arch/powerpc/platforms/
 core-$(CONFIG_XMON)		+= arch/ppc64/xmon/
 drivers-$(CONFIG_OPROFILE)	+= arch/powerpc/oprofile/

arch/ppc64/mm/Makefile

-#
-# Makefile for the linux ppc-specific parts of the memory manager.
-#
-
-EXTRA_CFLAGS += -mno-minimal-toc
-
-obj-y := fault.o init.o imalloc.o hash_utils.o hash_low.o tlb.o \
-	slb_low.o slb.o stab.o mmap.o
-obj-$(CONFIG_NEED_MULTIPLE_NODES) += numa.o
-obj-$(CONFIG_HUGETLB_PAGE) += hugetlbpage.o
-obj-$(CONFIG_PPC_MULTIPLATFORM) += hash_native.o

arch/ppc64/mm/fault.c

-/*
- *  arch/ppc/mm/fault.c
- *
- *  PowerPC version 
- *    Copyright (C) 1995-1996 Gary Thomas (gdt@linuxppc.org)
- *
- *  Derived from "arch/i386/mm/fault.c"
- *    Copyright (C) 1991, 1992, 1993, 1994  Linus Torvalds
- *
- *  Modified by Cort Dougan and Paul Mackerras.
- *
- *  Modified for PPC64 by Dave Engebretsen (engebret@ibm.com)
- *
- *  This program is free software; you can redistribute it and/or
- *  modify it under the terms of the GNU General Public License
- *  as published by the Free Software Foundation; either version
- *  2 of the License, or (at your option) any later version.
- */
-
-#include <linux/config.h>
-#include <linux/signal.h>
-#include <linux/sched.h>
-#include <linux/kernel.h>
-#include <linux/errno.h>
-#include <linux/string.h>
-#include <linux/types.h>
-#include <linux/mman.h>
-#include <linux/mm.h>
-#include <linux/interrupt.h>
-#include <linux/smp_lock.h>
-#include <linux/module.h>
-#include <linux/kprobes.h>
-
-#include <asm/page.h>
-#include <asm/pgtable.h>
-#include <asm/mmu.h>
-#include <asm/mmu_context.h>
-#include <asm/system.h>
-#include <asm/uaccess.h>
-#include <asm/kdebug.h>
-#include <asm/siginfo.h>
-
-/*
- * Check whether the instruction at regs->nip is a store using
- * an update addressing form which will update r1.
- */
-static int store_updates_sp(struct pt_regs *regs)
-{
-	unsigned int inst;
-
-	if (get_user(inst, (unsigned int __user *)regs->nip))
-		return 0;
-	/* check for 1 in the rA field */
-	if (((inst >> 16) & 0x1f) != 1)
-		return 0;
-	/* check major opcode */
-	switch (inst >> 26) {
-	case 37:	/* stwu */
-	case 39:	/* stbu */
-	case 45:	/* sthu */
-	case 53:	/* stfsu */
-	case 55:	/* stfdu */
-		return 1;
-	case 62:	/* std or stdu */
-		return (inst & 3) == 1;
-	case 31:
-		/* check minor opcode */
-		switch ((inst >> 1) & 0x3ff) {
-		case 181:	/* stdux */
-		case 183:	/* stwux */
-		case 247:	/* stbux */
-		case 439:	/* sthux */
-		case 695:	/* stfsux */
-		case 759:	/* stfdux */
-			return 1;
-		}
-	}
-	return 0;
-}
-
-static void do_dabr(struct pt_regs *regs, unsigned long error_code)
-{
-	siginfo_t info;
-
-	if (notify_die(DIE_DABR_MATCH, "dabr_match", regs, error_code,
-			11, SIGSEGV) == NOTIFY_STOP)
-		return;
-
-	if (debugger_dabr_match(regs))
-		return;
-
-	/* Clear the DABR */
-	set_dabr(0);
-
-	/* Deliver the signal to userspace */
-	info.si_signo = SIGTRAP;
-	info.si_errno = 0;
-	info.si_code = TRAP_HWBKPT;
-	info.si_addr = (void __user *)regs->nip;
-	force_sig_info(SIGTRAP, &info, current);
-}
-
-/*
- * The error_code parameter is
- *  - DSISR for a non-SLB data access fault,
- *  - SRR1 & 0x08000000 for a non-SLB instruction access fault
- *  - 0 any SLB fault.
- * The return value is 0 if the fault was handled, or the signal
- * number if this is a kernel fault that can't be handled here.
- */
-int __kprobes do_page_fault(struct pt_regs *regs, unsigned long address,
-			    unsigned long error_code)
-{
-	struct vm_area_struct * vma;
-	struct mm_struct *mm = current->mm;
-	siginfo_t info;
-	unsigned long code = SEGV_MAPERR;
-	unsigned long is_write = error_code & DSISR_ISSTORE;
-	unsigned long trap = TRAP(regs);
- 	unsigned long is_exec = trap == 0x400;
-
-	BUG_ON((trap == 0x380) || (trap == 0x480));
-
-	if (notify_die(DIE_PAGE_FAULT, "page_fault", regs, error_code,
-				11, SIGSEGV) == NOTIFY_STOP)
-		return 0;
-
-	if (trap == 0x300) {
-		if (debugger_fault_handler(regs))
-			return 0;
-	}
-
-	/* On a kernel SLB miss we can only check for a valid exception entry */
-	if (!user_mode(regs) && (address >= TASK_SIZE))
-		return SIGSEGV;
-
-  	if (error_code & DSISR_DABRMATCH) {
-		do_dabr(regs, error_code);
-		return 0;
-	}
-
-	if (in_atomic() || mm == NULL) {
-		if (!user_mode(regs))
-			return SIGSEGV;
-		/* in_atomic() in user mode is really bad,
-		   as is current->mm == NULL. */
-		printk(KERN_EMERG "Page fault in user mode with"
-		       "in_atomic() = %d mm = %p\n", in_atomic(), mm);
-		printk(KERN_EMERG "NIP = %lx  MSR = %lx\n",
-		       regs->nip, regs->msr);
-		die("Weird page fault", regs, SIGSEGV);
-	}
-
-	/* When running in the kernel we expect faults to occur only to
-	 * addresses in user space.  All other faults represent errors in the
-	 * kernel and should generate an OOPS.  Unfortunatly, in the case of an
-	 * erroneous fault occuring in a code path which already holds mmap_sem
-	 * we will deadlock attempting to validate the fault against the
-	 * address space.  Luckily the kernel only validly references user
-	 * space from well defined areas of code, which are listed in the
-	 * exceptions table.
-	 *
-	 * As the vast majority of faults will be valid we will only perform
-	 * the source reference check when there is a possibilty of a deadlock.
-	 * Attempt to lock the address space, if we cannot we then validate the
-	 * source.  If this is invalid we can skip the address space check,
-	 * thus avoiding the deadlock.
-	 */
-	if (!down_read_trylock(&mm->mmap_sem)) {
-		if (!user_mode(regs) && !search_exception_tables(regs->nip))
-			goto bad_area_nosemaphore;
-
-		down_read(&mm->mmap_sem);
-	}
-
-	vma = find_vma(mm, address);
-	if (!vma)
-		goto bad_area;
-
-	if (vma->vm_start <= address) {
-		goto good_area;
-	}
-	if (!(vma->vm_flags & VM_GROWSDOWN))
-		goto bad_area;
-
-	/*
-	 * N.B. The POWER/Open ABI allows programs to access up to
-	 * 288 bytes below the stack pointer.
-	 * The kernel signal delivery code writes up to about 1.5kB
-	 * below the stack pointer (r1) before decrementing it.
-	 * The exec code can write slightly over 640kB to the stack
-	 * before setting the user r1.  Thus we allow the stack to
-	 * expand to 1MB without further checks.
-	 */
-	if (address + 0x100000 < vma->vm_end) {
-		/* get user regs even if this fault is in kernel mode */
-		struct pt_regs *uregs = current->thread.regs;
-		if (uregs == NULL)
-			goto bad_area;
-
-		/*
-		 * A user-mode access to an address a long way below
-		 * the stack pointer is only valid if the instruction
-		 * is one which would update the stack pointer to the
-		 * address accessed if the instruction completed,
-		 * i.e. either stwu rs,n(r1) or stwux rs,r1,rb
-		 * (or the byte, halfword, float or double forms).
-		 *
-		 * If we don't check this then any write to the area
-		 * between the last mapped region and the stack will
-		 * expand the stack rather than segfaulting.
-		 */
-		if (address + 2048 < uregs->gpr[1]
-		    && (!user_mode(regs) || !store_updates_sp(regs)))
-			goto bad_area;
-	}
-
-	if (expand_stack(vma, address))
-		goto bad_area;
-
-good_area:
-	code = SEGV_ACCERR;
-
-	if (is_exec) {
-		/* protection fault */
-		if (error_code & DSISR_PROTFAULT)
-			goto bad_area;
-		if (!(vma->vm_flags & VM_EXEC))
-			goto bad_area;
-	/* a write */
-	} else if (is_write) {
-		if (!(vma->vm_flags & VM_WRITE))
-			goto bad_area;
-	/* a read */
-	} else {
-		if (!(vma->vm_flags & VM_READ))
-			goto bad_area;
-	}
-
- survive:
-	/*
-	 * If for any reason at all we couldn't handle the fault,
-	 * make sure we exit gracefully rather than endlessly redo
-	 * the fault.
-	 */
-	switch (handle_mm_fault(mm, vma, address, is_write)) {
-
-	case VM_FAULT_MINOR:
-		current->min_flt++;
-		break;
-	case VM_FAULT_MAJOR:
-		current->maj_flt++;
-		break;
-	case VM_FAULT_SIGBUS:
-		goto do_sigbus;
-	case VM_FAULT_OOM:
-		goto out_of_memory;
-	default:
-		BUG();
-	}
-
-	up_read(&mm->mmap_sem);
-	return 0;
-
-bad_area:
-	up_read(&mm->mmap_sem);
-
-bad_area_nosemaphore:
-	/* User mode accesses cause a SIGSEGV */
-	if (user_mode(regs)) {
-		info.si_signo = SIGSEGV;
-		info.si_errno = 0;
-		info.si_code = code;
-		info.si_addr = (void __user *) address;
-		force_sig_info(SIGSEGV, &info, current);
-		return 0;
-	}
-
-	if (trap == 0x400 && (error_code & DSISR_PROTFAULT)
-	    && printk_ratelimit())
-		printk(KERN_CRIT "kernel tried to execute NX-protected"
-		       " page (%lx) - exploit attempt? (uid: %d)\n",
-		       address, current->uid);
-
-	return SIGSEGV;
-
-/*
- * We ran out of memory, or some other thing happened to us that made
- * us unable to handle the page fault gracefully.
- */
-out_of_memory:
-	up_read(&mm->mmap_sem);
-	if (current->pid == 1) {
-		yield();
-		down_read(&mm->mmap_sem);
-		goto survive;
-	}
-	printk("VM: killing process %s\n", current->comm);
-	if (user_mode(regs))
-		do_exit(SIGKILL);
-	return SIGKILL;
-
-do_sigbus:
-	up_read(&mm->mmap_sem);
-	if (user_mode(regs)) {
-		info.si_signo = SIGBUS;
-		info.si_errno = 0;
-		info.si_code = BUS_ADRERR;
-		info.si_addr = (void __user *)address;
-		force_sig_info(SIGBUS, &info, current);
-		return 0;
-	}
-	return SIGBUS;
-}
-
-/*
- * bad_page_fault is called when we have a bad access from the kernel.
- * It is called from do_page_fault above and from some of the procedures
- * in traps.c.
- */
-void bad_page_fault(struct pt_regs *regs, unsigned long address, int sig)
-{
-	const struct exception_table_entry *entry;
-
-	/* Are we prepared to handle this fault?  */
-	if ((entry = search_exception_tables(regs->nip)) != NULL) {
-		regs->nip = entry->fixup;
-		return;
-	}
-
-	/* kernel has accessed a bad area */
-	die("Kernel access of bad area", regs, sig);
-}

arch/ppc64/mm/init.c

-/*
- *  PowerPC version 
- *    Copyright (C) 1995-1996 Gary Thomas (gdt@linuxppc.org)
- *
- *  Modifications by Paul Mackerras (PowerMac) (paulus@cs.anu.edu.au)
- *  and Cort Dougan (PReP) (cort@cs.nmt.edu)
- *    Copyright (C) 1996 Paul Mackerras
- *  Amiga/APUS changes by Jesper Skov (jskov@cygnus.co.uk).
- *
- *  Derived from "arch/i386/mm/init.c"
- *    Copyright (C) 1991, 1992, 1993, 1994  Linus Torvalds
- *
- *  Dave Engebretsen <engebret@us.ibm.com>
- *      Rework for PPC64 port.
- *
- *  This program is free software; you can redistribute it and/or
- *  modify it under the terms of the GNU General Public License
- *  as published by the Free Software Foundation; either version
- *  2 of the License, or (at your option) any later version.
- *
- */
-
-#include <linux/config.h>
-#include <linux/signal.h>
-#include <linux/sched.h>
-#include <linux/kernel.h>
-#include <linux/errno.h>
-#include <linux/string.h>
-#include <linux/types.h>
-#include <linux/mman.h>
-#include <linux/mm.h>
-#include <linux/swap.h>
-#include <linux/stddef.h>
-#include <linux/vmalloc.h>
-#include <linux/init.h>
-#include <linux/delay.h>
-#include <linux/bootmem.h>
-#include <linux/highmem.h>
-#include <linux/idr.h>
-#include <linux/nodemask.h>
-#include <linux/module.h>
-
-#include <asm/pgalloc.h>
-#include <asm/page.h>
-#include <asm/prom.h>
-#include <asm/lmb.h>
-#include <asm/rtas.h>
-#include <asm/io.h>
-#include <asm/mmu_context.h>
-#include <asm/pgtable.h>
-#include <asm/mmu.h>
-#include <asm/uaccess.h>
-#include <asm/smp.h>
-#include <asm/machdep.h>
-#include <asm/tlb.h>
-#include <asm/eeh.h>
-#include <asm/processor.h>
-#include <asm/mmzone.h>
-#include <asm/cputable.h>
-#include <asm/ppcdebug.h>
-#include <asm/sections.h>
-#include <asm/system.h>
-#include <asm/iommu.h>
-#include <asm/abs_addr.h>
-#include <asm/vdso.h>
-#include <asm/imalloc.h>
-
-#if PGTABLE_RANGE > USER_VSID_RANGE
-#warning Limited user VSID range means pagetable space is wasted
-#endif
-
-#if (TASK_SIZE_USER64 < PGTABLE_RANGE) && (TASK_SIZE_USER64 < USER_VSID_RANGE)
-#warning TASK_SIZE is smaller than it needs to be.
-#endif
-
-int mem_init_done;
-unsigned long ioremap_bot = IMALLOC_BASE;
-static unsigned long phbs_io_bot = PHBS_IO_BASE;
-
-extern pgd_t swapper_pg_dir[];
-extern struct task_struct *current_set[NR_CPUS];
-
-unsigned long klimit = (unsigned long)_end;
-
-unsigned long _SDR1=0;
-unsigned long _ASR=0;
-
-/* max amount of RAM to use */
-unsigned long __max_memory;
-
-/* info on what we think the IO hole is */
-unsigned long 	io_hole_start;
-unsigned long	io_hole_size;
-
-void show_mem(void)
-{
-	unsigned long total = 0, reserved = 0;
-	unsigned long shared = 0, cached = 0;
-	struct page *page;
-	pg_data_t *pgdat;
-	unsigned long i;
-
-	printk("Mem-info:\n");
-	show_free_areas();
-	printk("Free swap:       %6ldkB\n", nr_swap_pages<<(PAGE_SHIFT-10));
-	for_each_pgdat(pgdat) {
-		for (i = 0; i < pgdat->node_spanned_pages; i++) {
-			page = pgdat_page_nr(pgdat, i);
-			total++;
-			if (PageReserved(page))
-				reserved++;
-			else if (PageSwapCache(page))
-				cached++;
-			else if (page_count(page))
-				shared += page_count(page) - 1;
-		}
-	}
-	printk("%ld pages of RAM\n", total);
-	printk("%ld reserved pages\n", reserved);
-	printk("%ld pages shared\n", shared);
-	printk("%ld pages swap cached\n", cached);
-}
-
-#ifdef CONFIG_PPC_ISERIES
-
-void __iomem *ioremap(unsigned long addr, unsigned long size)
-{
-	return (void __iomem *)addr;
-}
-
-extern void __iomem *__ioremap(unsigned long addr, unsigned long size,
-		       unsigned long flags)
-{
-	return (void __iomem *)addr;
-}
-
-void iounmap(volatile void __iomem *addr)
-{
-	return;
-}
-
-#else
-
-/*
- * map_io_page currently only called by __ioremap
- * map_io_page adds an entry to the ioremap page table
- * and adds an entry to the HPT, possibly bolting it
- */
-static int map_io_page(unsigned long ea, unsigned long pa, int flags)
-{
-	pgd_t *pgdp;
-	pud_t *pudp;
-	pmd_t *pmdp;
-	pte_t *ptep;
-	unsigned long vsid;
-
-	if (mem_init_done) {
-		spin_lock(&init_mm.page_table_lock);
-		pgdp = pgd_offset_k(ea);
-		pudp = pud_alloc(&init_mm, pgdp, ea);
-		if (!pudp)
-			return -ENOMEM;
-		pmdp = pmd_alloc(&init_mm, pudp, ea);
-		if (!pmdp)
-			return -ENOMEM;
-		ptep = pte_alloc_kernel(&init_mm, pmdp, ea);
-		if (!ptep)
-			return -ENOMEM;
-		set_pte_at(&init_mm, ea, ptep, pfn_pte(pa >> PAGE_SHIFT,
-							  __pgprot(flags)));
-		spin_unlock(&init_mm.page_table_lock);
-	} else {
-		unsigned long va, vpn, hash, hpteg;
-
-		/*
-		 * If the mm subsystem is not fully up, we cannot create a
-		 * linux page table entry for this mapping.  Simply bolt an
-		 * entry in the hardware page table.
-		 */
-		vsid = get_kernel_vsid(ea);
-		va = (vsid << 28) | (ea & 0xFFFFFFF);
-		vpn = va >> PAGE_SHIFT;
-
-		hash = hpt_hash(vpn, 0);
-
-		hpteg = ((hash & htab_hash_mask) * HPTES_PER_GROUP);
-
-		/* Panic if a pte grpup is full */
-		if (ppc_md.hpte_insert(hpteg, va, pa >> PAGE_SHIFT,
-				       HPTE_V_BOLTED,
-				       _PAGE_NO_CACHE|_PAGE_GUARDED|PP_RWXX)
-		    == -1) {
-			panic("map_io_page: could not insert mapping");
-		}
-	}
-	return 0;
-}
-
-
-static void __iomem * __ioremap_com(unsigned long addr, unsigned long pa,
-			    unsigned long ea, unsigned long size,
-			    unsigned long flags)
-{
-	unsigned long i;
-
-	if ((flags & _PAGE_PRESENT) == 0)
-		flags |= pgprot_val(PAGE_KERNEL);
-
-	for (i = 0; i < size; i += PAGE_SIZE)
-		if (map_io_page(ea+i, pa+i, flags))
-			return NULL;
-
-	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;
-
-	/*
-	 * Choose an address to map it to.
-	 * Once the imalloc system is running, we use it.
-	 * Before that, we map using addresses going
-	 * up from ioremap_bot.  imalloc will use
-	 * the addresses from ioremap_bot through
-	 * IMALLOC_END
-	 * 
-	 */
-	pa = addr & PAGE_MASK;
-	size = PAGE_ALIGN(addr + size) - pa;
-
-	if (size == 0)
-		return NULL;
-
-	if (mem_init_done) {
-		struct vm_struct *area;
-		area = im_get_free_area(size);
-		if (area == NULL)
-			return NULL;
-		ea = (unsigned long)(area->addr);
-		ret = __ioremap_com(addr, pa, ea, size, flags);
-		if (!ret)
-			im_free(area->addr);
-	} else {
-		ea = ioremap_bot;
-		ret = __ioremap_com(addr, pa, ea, size, flags);
-		if (ret)
-			ioremap_bot += size;
-	}
-	return ret;
-}
-
-#define IS_PAGE_ALIGNED(_val) ((_val) == ((_val) & PAGE_MASK))
-
-int __ioremap_explicit(unsigned long pa, unsigned long ea,
-		       unsigned long size, unsigned long flags)
-{
-	struct vm_struct *area;
-	void __iomem *ret;
-	
-	/* For now, require page-aligned values for pa, ea, and size */
-	if (!IS_PAGE_ALIGNED(pa) || !IS_PAGE_ALIGNED(ea) ||
-	    !IS_PAGE_ALIGNED(size)) {
-		printk(KERN_ERR	"unaligned value in %s\n", __FUNCTION__);
-		return 1;
-	}
-	
-	if (!mem_init_done) {
-		/* Two things to consider in this case:
-		 * 1) No records will be kept (imalloc, etc) that the region
-		 *    has been remapped
-		 * 2) It won't be easy to iounmap() the region later (because
-		 *    of 1)
-		 */
-		;
-	} else {
-		area = im_get_area(ea, size,
-			IM_REGION_UNUSED|IM_REGION_SUBSET|IM_REGION_EXISTS);
-		if (area == NULL) {
-			/* Expected when PHB-dlpar is in play */
-			return 1;
-		}
-		if (ea != (unsigned long) area->addr) {
-			printk(KERN_ERR "unexpected addr return from "
-			       "im_get_area\n");
-			return 1;
-		}
-	}
-	
-	ret = __ioremap_com(pa, pa, ea, size, flags);
-	if (ret == NULL) {
-		printk(KERN_ERR "ioremap_explicit() allocation failure !\n");
-		return 1;
-	}
-	if (ret != (void *) ea) {
-		printk(KERN_ERR "__ioremap_com() returned unexpected addr\n");
-		return 1;
-	}
-
-	return 0;
-}
-
-/*  
- * Unmap an IO region and remove it from imalloc'd list.
- * Access to IO memory should be serialized by driver.
- * This code is modeled after vmalloc code - unmap_vm_area()
- *
- * XXX	what about calls before mem_init_done (ie python_countermeasures())
- */
-void iounmap(volatile void __iomem *token)
-{
-	void *addr;
-
-	if (!mem_init_done)
-		return;
-	
-	addr = (void *) ((unsigned long __force) token & PAGE_MASK);
-
-	im_free(addr);
-}
-
-static int iounmap_subset_regions(unsigned long addr, unsigned long size)
-{
-	struct vm_struct *area;
-
-	/* Check whether subsets of this region exist */
-	area = im_get_area(addr, size, IM_REGION_SUPERSET);
-	if (area == NULL)
-		return 1;
-
-	while (area) {
-		iounmap((void __iomem *) area->addr);
-		area = im_get_area(addr, size,
-				IM_REGION_SUPERSET);
-	}
-
-	return 0;
-}
-
-int iounmap_explicit(volatile void __iomem *start, unsigned long size)
-{
-	struct vm_struct *area;
-	unsigned long addr;
-	int rc;
-	
-	addr = (unsigned long __force) start & PAGE_MASK;
-
-	/* Verify that the region either exists or is a subset of an existing
-	 * region.  In the latter case, split the parent region to create 
-	 * the exact region 
-	 */
-	area = im_get_area(addr, size, 
-			    IM_REGION_EXISTS | IM_REGION_SUBSET);
-	if (area == NULL) {
-		/* Determine whether subset regions exist.  If so, unmap */
-		rc = iounmap_subset_regions(addr, size);
-		if (rc) {
-			printk(KERN_ERR
-			       "%s() cannot unmap nonexistent range 0x%lx\n",
- 				__FUNCTION__, addr);
-			return 1;
-		}
-	} else {
-		iounmap((void __iomem *) area->addr);
-	}
-	/*
-	 * FIXME! This can't be right:
-	iounmap(area->addr);
-	 * Maybe it should be "iounmap(area);"
-	 */
-	return 0;
-}
-
-#endif
-
-EXPORT_SYMBOL(ioremap);
-EXPORT_SYMBOL(__ioremap);
-EXPORT_SYMBOL(iounmap);
-
-void free_initmem(void)
-{
-	unsigned long addr;
-
-	addr = (unsigned long)__init_begin;
-	for (; addr < (unsigned long)__init_end; addr += PAGE_SIZE) {
-		memset((void *)addr, 0xcc, PAGE_SIZE);
-		ClearPageReserved(virt_to_page(addr));
-		set_page_count(virt_to_page(addr), 1);
-		free_page(addr);
-		totalram_pages++;
-	}
-	printk ("Freeing unused kernel memory: %luk freed\n",
-		((unsigned long)__init_end - (unsigned long)__init_begin) >> 10);
-}
-
-#ifdef CONFIG_BLK_DEV_INITRD
-void free_initrd_mem(unsigned long start, unsigned long end)
-{
-	if (start < end)
-		printk ("Freeing initrd memory: %ldk freed\n", (end - start) >> 10);
-	for (; start < end; start += PAGE_SIZE) {
-		ClearPageReserved(virt_to_page(start));
-		set_page_count(virt_to_page(start), 1);
-		free_page(start);
-		totalram_pages++;
-	}
-}
-#endif
-
-static DEFINE_SPINLOCK(mmu_context_lock);
-static DEFINE_IDR(mmu_context_idr);
-
-int init_new_context(struct task_struct *tsk, struct mm_struct *mm)
-{
-	int index;
-	int err;
-
-again:
-	if (!idr_pre_get(&mmu_context_idr, GFP_KERNEL))
-		return -ENOMEM;
-
-	spin_lock(&mmu_context_lock);
-	err = idr_get_new_above(&mmu_context_idr, NULL, 1, &index);
-	spin_unlock(&mmu_context_lock);
-
-	if (err == -EAGAIN)
-		goto again;
-	else if (err)
-		return err;
-
-	if (index > MAX_CONTEXT) {
-		idr_remove(&mmu_context_idr, index);
-		return -ENOMEM;
-	}
-
-	mm->context.id = index;
-
-	return 0;
-}
-
-void destroy_context(struct mm_struct *mm)
-{
-	spin_lock(&mmu_context_lock);
-	idr_remove(&mmu_context_idr, mm->context.id);
-	spin_unlock(&mmu_context_lock);
-
-	mm->context.id = NO_CONTEXT;
-}
-
-/*
- * Do very early mm setup.
- */
-void __init mm_init_ppc64(void)
-{
-#ifndef CONFIG_PPC_ISERIES
-	unsigned long i;
-#endif
-
-	ppc64_boot_msg(0x100, "MM Init");
-
-	/* This is the story of the IO hole... please, keep seated,
-	 * unfortunately, we are out of oxygen masks at the moment.
-	 * So we need some rough way to tell where your big IO hole
-	 * is. On pmac, it's between 2G and 4G, on POWER3, it's around
-	 * that area as well, on POWER4 we don't have one, etc...
-	 * We need that as a "hint" when sizing the TCE table on POWER3
-	 * So far, the simplest way that seem work well enough for us it
-	 * to just assume that the first discontinuity in our physical
-	 * RAM layout is the IO hole. That may not be correct in the future
-	 * (and isn't on iSeries but then we don't care ;)
-	 */
-
-#ifndef CONFIG_PPC_ISERIES
-	for (i = 1; i < lmb.memory.cnt; i++) {
-		unsigned long base, prevbase, prevsize;
-
-		prevbase = lmb.memory.region[i-1].base;
-		prevsize = lmb.memory.region[i-1].size;
-		base = lmb.memory.region[i].base;
-		if (base > (prevbase + prevsize)) {
-			io_hole_start = prevbase + prevsize;
-			io_hole_size = base  - (prevbase + prevsize);
-			break;
-		}
-	}
-#endif /* CONFIG_PPC_ISERIES */
-	if (io_hole_start)
-		printk("IO Hole assumed to be %lx -> %lx\n",
-		       io_hole_start, io_hole_start + io_hole_size - 1);
-
-	ppc64_boot_msg(0x100, "MM Init Done");
-}
-
-/*
- * This is called by /dev/mem to know if a given address has to
- * be mapped non-cacheable or not
- */
-int page_is_ram(unsigned long pfn)
-{
-	int i;
-	unsigned long paddr = (pfn << PAGE_SHIFT);
-
-	for (i=0; i < lmb.memory.cnt; i++) {
-		unsigned long base;
-
-		base = lmb.memory.region[i].base;
-
-		if ((paddr >= base) &&
-			(paddr < (base + lmb.memory.region[i].size))) {
-			return 1;
-		}
-	}
-
-	return 0;
-}
-EXPORT_SYMBOL(page_is_ram);
-
-/*
- * Initialize the bootmem system and give it all the memory we
- * have available.
- */
-#ifndef CONFIG_NEED_MULTIPLE_NODES
-void __init do_init_bootmem(void)
-{
-	unsigned long i;
-	unsigned long start, bootmap_pages;
-	unsigned long total_pages = lmb_end_of_DRAM() >> PAGE_SHIFT;
-	int boot_mapsize;
-
-	/*
-	 * Find an area to use for the bootmem bitmap.  Calculate the size of
-	 * bitmap required as (Total Memory) / PAGE_SIZE / BITS_PER_BYTE.
-	 * Add 1 additional page in case the address isn't page-aligned.
-	 */
-	bootmap_pages = bootmem_bootmap_pages(total_pages);
-
-	start = lmb_alloc(bootmap_pages<<PAGE_SHIFT, PAGE_SIZE);
-	BUG_ON(!start);
-
-	boot_mapsize = init_bootmem(start >> PAGE_SHIFT, total_pages);
-
-	max_pfn = max_low_pfn;
-
-	/* Add all physical memory to the bootmem map, mark each area
-	 * present.
-	 */
-	for (i=0; i < lmb.memory.cnt; i++)
-		free_bootmem(lmb.memory.region[i].base,
-			     lmb_size_bytes(&lmb.memory, i));
-
-	/* reserve the sections we're already using */
-	for (i=0; i < lmb.reserved.cnt; i++)
-		reserve_bootmem(lmb.reserved.region[i].base,
-				lmb_size_bytes(&lmb.reserved, i));
-
-	for (i=0; i < lmb.memory.cnt; i++)
-		memory_present(0, lmb_start_pfn(&lmb.memory, i),
-			       lmb_end_pfn(&lmb.memory, i));
-}
-
-/*
- * paging_init() sets up the page tables - in fact we've already done this.
- */
-void __init paging_init(void)
-{
-	unsigned long zones_size[MAX_NR_ZONES];
-	unsigned long zholes_size[MAX_NR_ZONES];
-	unsigned long total_ram = lmb_phys_mem_size();
-	unsigned long top_of_ram = lmb_end_of_DRAM();
-
-	printk(KERN_INFO "Top of RAM: 0x%lx, Total RAM: 0x%lx\n",
-	       top_of_ram, total_ram);
-	printk(KERN_INFO "Memory hole size: %ldMB\n",
-	       (top_of_ram - total_ram) >> 20);
-	/*
-	 * All pages are DMA-able so we put them all in the DMA zone.
-	 */
-	memset(zones_size, 0, sizeof(zones_size));
-	memset(zholes_size, 0, sizeof(zholes_size));
-
-	zones_size[ZONE_DMA] = top_of_ram >> PAGE_SHIFT;
-	zholes_size[ZONE_DMA] = (top_of_ram - total_ram) >> PAGE_SHIFT;
-
-	free_area_init_node(0, NODE_DATA(0), zones_size,
-			    __pa(PAGE_OFFSET) >> PAGE_SHIFT, zholes_size);
-}
-#endif /* ! CONFIG_NEED_MULTIPLE_NODES */
-
-static struct kcore_list kcore_vmem;
-
-static int __init setup_kcore(void)
-{
-	int i;
-
-	for (i=0; i < lmb.memory.cnt; i++) {
-		unsigned long base, size;
-		struct kcore_list *kcore_mem;
-
-		base = lmb.memory.region[i].base;
-		size = lmb.memory.region[i].size;
-
-		/* GFP_ATOMIC to avoid might_sleep warnings during boot */
-		kcore_mem = kmalloc(sizeof(struct kcore_list), GFP_ATOMIC);
-		if (!kcore_mem)
-			panic("mem_init: kmalloc failed\n");
-
-		kclist_add(kcore_mem, __va(base), size);
-	}
-
-	kclist_add(&kcore_vmem, (void *)VMALLOC_START, VMALLOC_END-VMALLOC_START);
-
-	return 0;
-}
-module_init(setup_kcore);
-
-void __init mem_init(void)
-{
-#ifdef CONFIG_NEED_MULTIPLE_NODES
-	int nid;
-#endif
-	pg_data_t *pgdat;
-	unsigned long i;
-	struct page *page;
-	unsigned long reservedpages = 0, codesize, initsize, datasize, bsssize;
-
-	num_physpages = max_low_pfn;	/* RAM is assumed contiguous */
-	high_memory = (void *) __va(max_low_pfn * PAGE_SIZE);
-
-#ifdef CONFIG_NEED_MULTIPLE_NODES
-        for_each_online_node(nid) {
-		if (NODE_DATA(nid)->node_spanned_pages != 0) {
-			printk("freeing bootmem node %x\n", nid);
-			totalram_pages +=
-				free_all_bootmem_node(NODE_DATA(nid));
-		}
-	}
-#else
-	max_mapnr = num_physpages;
-	totalram_pages += free_all_bootmem();
-#endif
-
-	for_each_pgdat(pgdat) {
-		for (i = 0; i < pgdat->node_spanned_pages; i++) {
-			page = pgdat_page_nr(pgdat, i);
-			if (PageReserved(page))
-				reservedpages++;
-		}
-	}
-
-	codesize = (unsigned long)&_etext - (unsigned long)&_stext;
-	initsize = (unsigned long)&__init_end - (unsigned long)&__init_begin;
-	datasize = (unsigned long)&_edata - (unsigned long)&__init_end;
-	bsssize = (unsigned long)&__bss_stop - (unsigned long)&__bss_start;
-
-	printk(KERN_INFO "Memory: %luk/%luk available (%luk kernel code, "
-	       "%luk reserved, %luk data, %luk bss, %luk init)\n",
-		(unsigned long)nr_free_pages() << (PAGE_SHIFT-10),
-		num_physpages << (PAGE_SHIFT-10),
-		codesize >> 10,
-		reservedpages << (PAGE_SHIFT-10),
-		datasize >> 10,
-		bsssize >> 10,
-		initsize >> 10);
-
-	mem_init_done = 1;
-
-	/* Initialize the vDSO */
-	vdso_init();
-}
-
-/*
- * This is called when a page has been modified by the kernel.
- * It just marks the page as not i-cache clean.  We do the i-cache
- * flush later when the page is given to a user process, if necessary.
- */
-void flush_dcache_page(struct page *page)
-{
-	if (cpu_has_feature(CPU_FTR_COHERENT_ICACHE))
-		return;
-	/* avoid an atomic op if possible */
-	if (test_bit(PG_arch_1, &page->flags))
-		clear_bit(PG_arch_1, &page->flags);
-}
-EXPORT_SYMBOL(flush_dcache_page);
-
-void clear_user_page(void *page, unsigned long vaddr, struct page *pg)
-{
-	clear_page(page);
-
-	if (cpu_has_feature(CPU_FTR_COHERENT_ICACHE))
-		return;
-	/*
-	 * We shouldnt have to do this, but some versions of glibc
-	 * require it (ld.so assumes zero filled pages are icache clean)
-	 * - Anton
-	 */
-
-	/* avoid an atomic op if possible */
-	if (test_bit(PG_arch_1, &pg->flags))
-		clear_bit(PG_arch_1, &pg->flags);
-}
-EXPORT_SYMBOL(clear_user_page);
-
-void copy_user_page(void *vto, void *vfrom, unsigned long vaddr,
-		    struct page *pg)
-{
-	copy_page(vto, vfrom);
-
-	/*
-	 * We should be able to use the following optimisation, however
-	 * there are two problems.
-	 * Firstly a bug in some versions of binutils meant PLT sections
-	 * were not marked executable.
-	 * Secondly the first word in the GOT section is blrl, used
-	 * to establish the GOT address. Until recently the GOT was
-	 * not marked executable.
-	 * - Anton
-	 */
-#if 0
-	if (!vma->vm_file && ((vma->vm_flags & VM_EXEC) == 0))
-		return;
-#endif
-
-	if (cpu_has_feature(CPU_FTR_COHERENT_ICACHE))
-		return;
-
-	/* avoid an atomic op if possible */
-	if (test_bit(PG_arch_1, &pg->flags))
-		clear_bit(PG_arch_1, &pg->flags);
-}
-
-void flush_icache_user_range(struct vm_area_struct *vma, struct page *page,
-			     unsigned long addr, int len)
-{
-	unsigned long maddr;
-
-	maddr = (unsigned long)page_address(page) + (addr & ~PAGE_MASK);
-	flush_icache_range(maddr, maddr + len);
-}
-EXPORT_SYMBOL(flush_icache_user_range);
-
-/*
- * This is called at the end of handling a user page fault, when the
- * fault has been handled by updating a PTE in the linux page tables.
- * We use it to preload an HPTE into the hash table corresponding to
- * the updated linux PTE.
- * 
- * This must always be called with the mm->page_table_lock held
- */
-void update_mmu_cache(struct vm_area_struct *vma, unsigned long ea,
-		      pte_t pte)
-{
-	unsigned long vsid;
-	void *pgdir;
-	pte_t *ptep;
-	int local = 0;
-	cpumask_t tmp;
-	unsigned long flags;
-
-	/* handle i-cache coherency */
-	if (!cpu_has_feature(CPU_FTR_COHERENT_ICACHE) &&
-	    !cpu_has_feature(CPU_FTR_NOEXECUTE)) {
-		unsigned long pfn = pte_pfn(pte);
-		if (pfn_valid(pfn)) {
-			struct page *page = pfn_to_page(pfn);
-			if (!PageReserved(page)
-			    && !test_bit(PG_arch_1, &page->flags)) {
-				__flush_dcache_icache(page_address(page));
-				set_bit(PG_arch_1, &page->flags);
-			}
-		}
-	}
-
-	/* We only want HPTEs for linux PTEs that have _PAGE_ACCESSED set */
-	if (!pte_young(pte))
-		return;
-
-	pgdir = vma->vm_mm->pgd;
-	if (pgdir == NULL)
-		return;
-
-	ptep = find_linux_pte(pgdir, ea);
-	if (!ptep)
-		return;
-
-	vsid = get_vsid(vma->vm_mm->context.id, ea);
-
-	local_irq_save(flags);
-	tmp = cpumask_of_cpu(smp_processor_id());
-	if (cpus_equal(vma->vm_mm->cpu_vm_mask, tmp))
-		local = 1;
-
-	__hash_page(ea, pte_val(pte) & (_PAGE_USER|_PAGE_RW), vsid, ptep,
-		    0x300, local);
-	local_irq_restore(flags);
-}
-
-void __iomem * reserve_phb_iospace(unsigned long size)
-{
-	void __iomem *virt_addr;
-		
-	if (phbs_io_bot >= IMALLOC_BASE) 
-		panic("reserve_phb_iospace(): phb io space overflow\n");
-			
-	virt_addr = (void __iomem *) phbs_io_bot;
-	phbs_io_bot += size;
-
-	return virt_addr;
-}
-
-static void zero_ctor(void *addr, kmem_cache_t *cache, unsigned long flags)
-{
-	memset(addr, 0, kmem_cache_size(cache));
-}
-
-static const int pgtable_cache_size[2] = {
-	PTE_TABLE_SIZE, PMD_TABLE_SIZE
-};
-static const char *pgtable_cache_name[ARRAY_SIZE(pgtable_cache_size)] = {
-	"pgd_pte_cache", "pud_pmd_cache",
-};
-
-kmem_cache_t *pgtable_cache[ARRAY_SIZE(pgtable_cache_size)];
-
-void pgtable_cache_init(void)
-{
-	int i;
-
-	BUILD_BUG_ON(PTE_TABLE_SIZE != pgtable_cache_size[PTE_CACHE_NUM]);
-	BUILD_BUG_ON(PMD_TABLE_SIZE != pgtable_cache_size[PMD_CACHE_NUM]);
-	BUILD_BUG_ON(PUD_TABLE_SIZE != pgtable_cache_size[PUD_CACHE_NUM]);
-	BUILD_BUG_ON(PGD_TABLE_SIZE != pgtable_cache_size[PGD_CACHE_NUM]);
-
-	for (i = 0; i < ARRAY_SIZE(pgtable_cache_size); i++) {
-		int size = pgtable_cache_size[i];
-		const char *name = pgtable_cache_name[i];
-
-		pgtable_cache[i] = kmem_cache_create(name,
-						     size, size,
-						     SLAB_HWCACHE_ALIGN
-						     | SLAB_MUST_HWCACHE_ALIGN,
-						     zero_ctor,
-						     NULL);
-		if (! pgtable_cache[i])
-			panic("pgtable_cache_init(): could not create %s!\n",
-			      name);
-	}
-}
-
-pgprot_t phys_mem_access_prot(struct file *file, unsigned long addr,
-			      unsigned long size, pgprot_t vma_prot)
-{
-	if (ppc_md.phys_mem_access_prot)
-		return ppc_md.phys_mem_access_prot(file, addr, size, vma_prot);
-
-	if (!page_is_ram(addr >> PAGE_SHIFT))
-		vma_prot = __pgprot(pgprot_val(vma_prot)
-				    | _PAGE_GUARDED | _PAGE_NO_CACHE);
-	return vma_prot;
-}
-EXPORT_SYMBOL(phys_mem_access_prot);