[PATCH] powerpc: Take 5, merge page.h

Michael Ellerman michael at ellerman.id.au
Fri Nov 11 14:25:24 EST 2005


Merge asm-ppc/page.h and asm-ppc64/page.h, into asm-powerpc/page.h,
asm-powerpc/page_32.h and asm-powerpc/page_64.h

There's a bit of weirdness in page_32.h, with APUS undef'ing things. I think
this is cleaner though than polluting the rest of the code with PPC_MEMOFFSET
etc.

Built for PPC (common_defconfig), with ARCH=powerpc, mostly built with ARCH=ppc
(other things break the build). Built and booted on P5 LPAR for PPC64 with
ARCH=ppc/powerpc (pseries_defconfig). Mostly built for iSeries powerpc.

Signed-off-by: Michael Ellerman <michael at ellerman.id.au>
---

 arch/ppc64/Kconfig            |    5 
 include/asm-powerpc/page.h    |  176 ++++++++++++++++++++++
 include/asm-powerpc/page_32.h |   97 ++++++++++++
 include/asm-powerpc/page_64.h |  177 ++++++++++++++++++++++
 include/asm-ppc/page.h        |  173 ---------------------
 include/asm-ppc64/page.h      |  333 ------------------------------------------
 6 files changed, 455 insertions(+), 506 deletions(-)

Index: kexec/include/asm-powerpc/page.h
===================================================================
--- /dev/null
+++ kexec/include/asm-powerpc/page.h
@@ -0,0 +1,176 @@
+#ifndef _ASM_POWERPC_PAGE_H
+#define _ASM_POWERPC_PAGE_H
+
+/*
+ * Copyright (C) 2001,2005 IBM Corporation.
+ *
+ * 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.
+ */
+
+#ifdef __KERNEL__
+#include <linux/config.h>
+#include <asm/asm-compat.h>
+
+/*
+ * On PPC32 page size is 4K. For PPC64 we support either 4K or 64K software
+ * page size. When using 64K pages however, whether we are really supporting
+ * 64K pages in HW or not is irrelevant to those definitions.
+ */
+#ifdef CONFIG_PPC_64K_PAGES
+#define PAGE_SHIFT		16
+#else
+#define PAGE_SHIFT		12
+#endif
+
+#define PAGE_SIZE		(ASM_CONST(1) << PAGE_SHIFT)
+
+/*
+ * Subtle: (1 << PAGE_SHIFT) is an int, not an unsigned long. So if we
+ * assign PAGE_MASK to a larger type it gets extended the way we want
+ * (i.e. with 1s in the high bits)
+ */
+#define PAGE_MASK      (~((1 << PAGE_SHIFT) - 1))
+
+#define PAGE_OFFSET     ASM_CONST(CONFIG_KERNEL_START)
+#define KERNELBASE      PAGE_OFFSET
+
+#ifdef CONFIG_DISCONTIGMEM
+#define page_to_pfn(page)	discontigmem_page_to_pfn(page)
+#define pfn_to_page(pfn)	discontigmem_pfn_to_page(pfn)
+#define pfn_valid(pfn)		discontigmem_pfn_valid(pfn)
+#endif
+
+#ifdef CONFIG_FLATMEM
+#define pfn_to_page(pfn)	(mem_map + (pfn))
+#define page_to_pfn(page)	((unsigned long)((page) - mem_map))
+#define pfn_valid(pfn)		((pfn) < max_mapnr)
+#endif
+
+#define virt_to_page(kaddr)	pfn_to_page(__pa(kaddr) >> PAGE_SHIFT)
+#define pfn_to_kaddr(pfn)	__va((pfn) << PAGE_SHIFT)
+#define virt_addr_valid(kaddr)	pfn_valid(__pa(kaddr) >> PAGE_SHIFT)
+
+#define __va(x) ((void *)((unsigned long)(x) + KERNELBASE))
+#define __pa(x) ((unsigned long)(x) - PAGE_OFFSET)
+
+/*
+ * Unfortunately the PLT is in the BSS in the PPC32 ELF ABI,
+ * and needs to be executable.  This means the whole heap ends
+ * up being executable.
+ */
+#define VM_DATA_DEFAULT_FLAGS32	(VM_READ | VM_WRITE | VM_EXEC | \
+				 VM_MAYREAD | VM_MAYWRITE | VM_MAYEXEC)
+
+#define VM_DATA_DEFAULT_FLAGS64	(VM_READ | VM_WRITE | \
+				 VM_MAYREAD | VM_MAYWRITE | VM_MAYEXEC)
+
+#ifdef __powerpc64__
+#include <asm/page_64.h>
+#else
+#include <asm/page_32.h>
+#endif
+
+/* align addr on a size boundary - adjust address up/down if needed */
+#define _ALIGN_UP(addr,size)	(((addr)+((size)-1))&(~((size)-1)))
+#define _ALIGN_DOWN(addr,size)	((addr)&(~((size)-1)))
+
+/* align addr on a size boundary - adjust address up if needed */
+#define _ALIGN(addr,size)     _ALIGN_UP(addr,size)
+
+/* to align the pointer to the (next) page boundary */
+#define PAGE_ALIGN(addr)	_ALIGN(addr, PAGE_SIZE)
+
+#ifndef __ASSEMBLY__
+
+#undef STRICT_MM_TYPECHECKS
+
+#ifdef STRICT_MM_TYPECHECKS
+/* These are used to make use of C type-checking. */
+
+/* PTE level */
+typedef struct { pte_basic_t pte; } pte_t;
+#define pte_val(x)	((x).pte)
+#define __pte(x)	((pte_t) { (x) })
+
+/* 64k pages additionally define a bigger "real PTE" type that gathers
+ * the "second half" part of the PTE for pseudo 64k pages
+ */
+#ifdef CONFIG_PPC_64K_PAGES
+typedef struct { pte_t pte; unsigned long hidx; } real_pte_t;
+#else
+typedef struct { pte_t pte; } real_pte_t;
+#endif
+
+/* PMD level */
+typedef struct { unsigned long pmd; } pmd_t;
+#define pmd_val(x)	((x).pmd)
+#define __pmd(x)	((pmd_t) { (x) })
+
+/* PUD level exusts only on 4k pages */
+#ifndef CONFIG_PPC_64K_PAGES
+typedef struct { unsigned long pud; } pud_t;
+#define pud_val(x)	((x).pud)
+#define __pud(x)	((pud_t) { (x) })
+#endif
+
+/* PGD level */
+typedef struct { unsigned long pgd; } pgd_t;
+#define pgd_val(x)	((x).pgd)
+#define __pgd(x)	((pgd_t) { (x) })
+
+/* Page protection bits */
+typedef struct { unsigned long pgprot; } pgprot_t;
+#define pgprot_val(x)	((x).pgprot)
+#define __pgprot(x)	((pgprot_t) { (x) })
+
+#else
+
+/*
+ * .. while these make it easier on the compiler
+ */
+
+typedef pte_basic_t pte_t;
+#define pte_val(x)	(x)
+#define __pte(x)	(x)
+
+#ifdef CONFIG_PPC_64K_PAGES
+typedef struct { pte_t pte; unsigned long hidx; } real_pte_t;
+#else
+typedef unsigned long real_pte_t;
+#endif
+
+
+typedef unsigned long pmd_t;
+#define pmd_val(x)	(x)
+#define __pmd(x)	(x)
+
+#ifndef CONFIG_PPC_64K_PAGES
+typedef unsigned long pud_t;
+#define pud_val(x)	(x)
+#define __pud(x)	(x)
+#endif
+
+typedef unsigned long pgd_t;
+#define pgd_val(x)	(x)
+#define pgprot_val(x)	(x)
+
+typedef unsigned long pgprot_t;
+#define __pgd(x)	(x)
+#define __pgprot(x)	(x)
+
+#endif
+
+struct page;
+extern void clear_user_page(void *page, unsigned long vaddr, struct page *pg);
+extern void copy_user_page(void *to, void *from, unsigned long vaddr,
+		struct page *p);
+extern int page_is_ram(unsigned long pfn);
+
+#endif /* __ASSEMBLY__ */
+
+#endif /* __KERNEL__ */
+
+#endif /* _ASM_POWERPC_PAGE_H */
Index: kexec/include/asm-powerpc/page_32.h
===================================================================
--- /dev/null
+++ kexec/include/asm-powerpc/page_32.h
@@ -0,0 +1,97 @@
+#ifndef _ASM_POWERPC_PAGE_32_H
+#define _ASM_POWERPC_PAGE_32_H
+
+#define VM_DATA_DEFAULT_FLAGS	VM_DATA_DEFAULT_FLAGS32
+
+#ifndef __ASSEMBLY__
+/*
+ * The basic type of a PTE - 64 bits for those CPUs with > 32 bit
+ * physical addressing.  For now this just the IBM PPC440.
+ */
+#ifdef CONFIG_PTE_64BIT
+typedef unsigned long long pte_basic_t;
+#define PTE_SHIFT	(PAGE_SHIFT - 3)	/* 512 ptes per page */
+#define PTE_FMT		"%16Lx"
+#else
+typedef unsigned long pte_basic_t;
+#define PTE_SHIFT	(PAGE_SHIFT - 2)	/* 1024 ptes per page */
+#define PTE_FMT		"%.8lx"
+#endif
+
+struct page;
+extern void clear_pages(void *page, int order);
+static inline void clear_page(void *page) { clear_pages(page, 0); }
+extern void copy_page(void *to, void *from);
+
+/* Pure 2^n version of get_order */
+extern __inline__ int get_order(unsigned long size)
+{
+	int lz;
+
+	size = (size-1) >> PAGE_SHIFT;
+	asm ("cntlzw %0,%1" : "=r" (lz) : "r" (size));
+	return 32 - lz;
+}
+
+#ifndef CONFIG_APUS
+#define PPC_MEMSTART	0
+#else /* CONFIG_APUS */
+extern unsigned long ppc_memstart;
+extern unsigned long ppc_pgstart;
+extern unsigned long ppc_memoffset;
+#define PPC_MEMSTART ppc_memstart
+
+#ifdef MODULE
+#define ___pa(vaddr) ((vaddr) - ppc_memoffset)
+#define ___va(paddr) ((paddr) + ppc_memoffset)
+#else /* !MODULE */
+/* map phys->virtual and virtual->phys for RAM pages */
+static inline unsigned long ___pa(unsigned long v)
+{
+	unsigned long p;
+	asm volatile ("1: addis %0, %1, %2;"
+		      ".section \".vtop_fixup\",\"aw\";"
+		      ".align  1;"
+		      ".long   1b;"
+		      ".previous;"
+		      : "=r" (p)
+		      : "b" (v), "K" (((-PAGE_OFFSET) >> 16) & 0xffff));
+
+	return p;
+}
+static inline void* ___va(unsigned long p)
+{
+	unsigned long v;
+	asm volatile ("1: addis %0, %1, %2;"
+		      ".section \".ptov_fixup\",\"aw\";"
+		      ".align  1;"
+		      ".long   1b;"
+		      ".previous;"
+		      : "=r" (v)
+		      : "b" (p), "K" (((PAGE_OFFSET) >> 16) & 0xffff));
+
+	return (void*) v;
+}
+#endif
+
+/* APUS needs more complicated versions of these macros */
+#undef __pa
+#define __pa(x) ___pa((unsigned long)(x))
+
+#undef __va
+#define __va(x) ((void *)(___va((unsigned long)(x))))
+
+#undef pfn_to_page
+#define pfn_to_page(pfn)	(mem_map + ((pfn) - ppc_pgstart))
+
+#undef page_to_pfn
+#define page_to_pfn(page)	((unsigned long)((page) - mem_map) + ppc_pgstart)
+
+#undef pfn_valid
+#define pfn_valid(pfn)		(((pfn) - ppc_pgstart) < max_mapnr)
+
+#endif /* CONFIG_APUS */
+
+#endif /* __ASSEMBLY__ */
+
+#endif /* _ASM_POWERPC_PAGE_32_H */
Index: kexec/include/asm-powerpc/page_64.h
===================================================================
--- /dev/null
+++ kexec/include/asm-powerpc/page_64.h
@@ -0,0 +1,177 @@
+#ifndef _ASM_POWERPC_PAGE_64_H
+#define _ASM_POWERPC_PAGE_64_H
+
+/*
+ * Copyright (C) 2001 PPC64 Team, IBM Corp
+ *
+ * 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.
+ */
+
+/*
+ * We always define HW_PAGE_SHIFT to 12 as use of 64K pages remains Linux
+ * specific, every notion of page number shared with the firmware, TCEs,
+ * iommu, etc... still uses a page size of 4K.
+ */
+#define HW_PAGE_SHIFT		12
+#define HW_PAGE_SIZE		(ASM_CONST(1) << HW_PAGE_SHIFT)
+#define HW_PAGE_MASK		(~(HW_PAGE_SIZE-1))
+
+/*
+ * PAGE_FACTOR is the number of bits factor between PAGE_SHIFT and
+ * HW_PAGE_SHIFT, that is 4K pages.
+ */
+#define PAGE_FACTOR		(PAGE_SHIFT - HW_PAGE_SHIFT)
+
+#define REGION_SIZE   4UL
+#define REGION_SHIFT  60UL
+#define REGION_MASK   (((1UL<<REGION_SIZE)-1UL)<<REGION_SHIFT)
+
+#define VMALLOCBASE		ASM_CONST(0xD000000000000000)
+#define VMALLOC_REGION_ID	(VMALLOCBASE >> REGION_SHIFT)
+#define KERNEL_REGION_ID	(KERNELBASE >> REGION_SHIFT)
+#define USER_REGION_ID		(0UL)
+#define REGION_ID(ea)		(((unsigned long)(ea)) >> REGION_SHIFT)
+
+/* Segment size */
+#define SID_SHIFT		28
+#define SID_MASK		0xfffffffffUL
+#define ESID_MASK		0xfffffffff0000000UL
+#define GET_ESID(x)		(((x) >> SID_SHIFT) & SID_MASK)
+
+#ifndef __ASSEMBLY__
+#include <asm/cache.h>
+
+typedef unsigned long pte_basic_t;
+
+static __inline__ void clear_page(void *addr)
+{
+	unsigned long lines, line_size;
+
+	line_size = ppc64_caches.dline_size;
+	lines = ppc64_caches.dlines_per_page;
+
+	__asm__ __volatile__(
+	"mtctr	%1	# clear_page\n\
+1:      dcbz	0,%0\n\
+	add	%0,%0,%3\n\
+	bdnz+	1b"
+        : "=r" (addr)
+        : "r" (lines), "0" (addr), "r" (line_size)
+	: "ctr", "memory");
+}
+
+extern void copy_4K_page(void *to, void *from);
+
+#ifdef CONFIG_PPC_64K_PAGES
+static inline void copy_page(void *to, void *from)
+{
+	unsigned int i;
+	for (i=0; i < (1 << (PAGE_SHIFT - 12)); i++) {
+		copy_4K_page(to, from);
+		to += 4096;
+		from += 4096;
+	}
+}
+#else /* CONFIG_PPC_64K_PAGES */
+static inline void copy_page(void *to, void *from)
+{
+	copy_4K_page(to, from);
+}
+#endif /* CONFIG_PPC_64K_PAGES */
+
+/* Log 2 of page table size */
+extern u64 ppc64_pft_size;
+
+/* We do define AT_SYSINFO_EHDR but don't use the gate mecanism */
+#define __HAVE_ARCH_GATE_AREA		1
+
+/* Large pages size */
+extern unsigned int HPAGE_SHIFT;
+#define HPAGE_SIZE		((1UL) << HPAGE_SHIFT)
+#define HPAGE_MASK		(~(HPAGE_SIZE - 1))
+#define HUGETLB_PAGE_ORDER	(HPAGE_SHIFT - PAGE_SHIFT)
+
+#endif /* __ASSEMBLY__ */
+
+#ifdef CONFIG_HUGETLB_PAGE
+
+#define HTLB_AREA_SHIFT		40
+#define HTLB_AREA_SIZE		(1UL << HTLB_AREA_SHIFT)
+#define GET_HTLB_AREA(x)	((x) >> HTLB_AREA_SHIFT)
+
+#define LOW_ESID_MASK(addr, len)    (((1U << (GET_ESID(addr+len-1)+1)) \
+		                      - (1U << GET_ESID(addr))) & 0xffff)
+#define HTLB_AREA_MASK(addr, len)   (((1U << (GET_HTLB_AREA(addr+len-1)+1)) \
+		                      - (1U << GET_HTLB_AREA(addr))) & 0xffff)
+
+#define ARCH_HAS_HUGEPAGE_ONLY_RANGE
+#define ARCH_HAS_PREPARE_HUGEPAGE_RANGE
+#define ARCH_HAS_SETCLEAR_HUGE_PTE
+
+#define touches_hugepage_low_range(mm, addr, len) \
+	(LOW_ESID_MASK((addr), (len)) & (mm)->context.low_htlb_areas)
+#define touches_hugepage_high_range(mm, addr, len) \
+	(HTLB_AREA_MASK((addr), (len)) & (mm)->context.high_htlb_areas)
+
+#define __within_hugepage_low_range(addr, len, segmask) \
+	((LOW_ESID_MASK((addr), (len)) | (segmask)) == (segmask))
+#define within_hugepage_low_range(addr, len) \
+	__within_hugepage_low_range((addr), (len), \
+				    current->mm->context.low_htlb_areas)
+#define __within_hugepage_high_range(addr, len, zonemask) \
+	((HTLB_AREA_MASK((addr), (len)) | (zonemask)) == (zonemask))
+#define within_hugepage_high_range(addr, len) \
+	__within_hugepage_high_range((addr), (len), \
+				    current->mm->context.high_htlb_areas)
+
+#define is_hugepage_only_range(mm, addr, len) \
+	(touches_hugepage_high_range((mm), (addr), (len)) || \
+	  touches_hugepage_low_range((mm), (addr), (len)))
+#define HAVE_ARCH_HUGETLB_UNMAPPED_AREA
+
+#define in_hugepage_area(context, addr) \
+	(cpu_has_feature(CPU_FTR_16M_PAGE) && \
+	 ( ((1 << GET_HTLB_AREA(addr)) & (context).high_htlb_areas) || \
+	   ( ((addr) < 0x100000000L) && \
+	     ((1 << GET_ESID(addr)) & (context).low_htlb_areas) ) ) )
+
+#else /* !CONFIG_HUGETLB_PAGE */
+
+#define in_hugepage_area(mm, addr)	0
+
+#endif /* !CONFIG_HUGETLB_PAGE */
+
+#ifdef MODULE
+#define __page_aligned __attribute__((__aligned__(PAGE_SIZE)))
+#else
+#define __page_aligned \
+	__attribute__((__aligned__(PAGE_SIZE), \
+		__section__(".data.page_aligned")))
+#endif
+
+#define VM_DATA_DEFAULT_FLAGS \
+	(test_thread_flag(TIF_32BIT) ? \
+	 VM_DATA_DEFAULT_FLAGS32 : VM_DATA_DEFAULT_FLAGS64)
+
+/*
+ * This is the default if a program doesn't have a PT_GNU_STACK
+ * program header entry. The PPC64 ELF ABI has a non executable stack
+ * stack by default, so in the absense of a PT_GNU_STACK program header
+ * we turn execute permission off.
+ */
+#define VM_STACK_DEFAULT_FLAGS32	(VM_READ | VM_WRITE | VM_EXEC | \
+					 VM_MAYREAD | VM_MAYWRITE | VM_MAYEXEC)
+
+#define VM_STACK_DEFAULT_FLAGS64	(VM_READ | VM_WRITE | \
+					 VM_MAYREAD | VM_MAYWRITE | VM_MAYEXEC)
+
+#define VM_STACK_DEFAULT_FLAGS \
+	(test_thread_flag(TIF_32BIT) ? \
+	 VM_STACK_DEFAULT_FLAGS32 : VM_STACK_DEFAULT_FLAGS64)
+
+#include <asm-generic/page.h>
+
+#endif /* _ASM_POWERPC_PAGE_64_H */
Index: kexec/include/asm-ppc/page.h
===================================================================
--- kexec.orig/include/asm-ppc/page.h
+++ /dev/null
@@ -1,173 +0,0 @@
-#ifndef _PPC_PAGE_H
-#define _PPC_PAGE_H
-
-/* PAGE_SHIFT determines the page size */
-#define PAGE_SHIFT	12
-#define PAGE_SIZE	(1UL << PAGE_SHIFT)
-
-/*
- * Subtle: this is an int (not an unsigned long) and so it
- * gets extended to 64 bits the way want (i.e. with 1s).  -- paulus
- */
-#define PAGE_MASK	(~((1 << PAGE_SHIFT) - 1))
-
-#ifdef __KERNEL__
-#include <linux/config.h>
-
-/* This must match what is in arch/ppc/Makefile */
-#define PAGE_OFFSET	CONFIG_KERNEL_START
-#define KERNELBASE	PAGE_OFFSET
-
-#ifndef __ASSEMBLY__
-
-/*
- * The basic type of a PTE - 64 bits for those CPUs with > 32 bit
- * physical addressing.  For now this just the IBM PPC440.
- */
-#ifdef CONFIG_PTE_64BIT
-typedef unsigned long long pte_basic_t;
-#define PTE_SHIFT	(PAGE_SHIFT - 3)	/* 512 ptes per page */
-#define PTE_FMT		"%16Lx"
-#else
-typedef unsigned long pte_basic_t;
-#define PTE_SHIFT	(PAGE_SHIFT - 2)	/* 1024 ptes per page */
-#define PTE_FMT		"%.8lx"
-#endif
-
-/* align addr on a size boundary - adjust address up/down if needed */
-#define _ALIGN_UP(addr,size)	(((addr)+((size)-1))&(~((size)-1)))
-#define _ALIGN_DOWN(addr,size)	((addr)&(~((size)-1)))
-
-/* align addr on a size boundary - adjust address up if needed */
-#define _ALIGN(addr,size)     _ALIGN_UP(addr,size)
-
-/* to align the pointer to the (next) page boundary */
-#define PAGE_ALIGN(addr)	_ALIGN(addr, PAGE_SIZE)
-
-
-#undef STRICT_MM_TYPECHECKS
-
-#ifdef STRICT_MM_TYPECHECKS
-/*
- * These are used to make use of C type-checking..
- */
-typedef struct { pte_basic_t pte; } pte_t;
-typedef struct { unsigned long pmd; } pmd_t;
-typedef struct { unsigned long pgd; } pgd_t;
-typedef struct { unsigned long pgprot; } pgprot_t;
-
-#define pte_val(x)	((x).pte)
-#define pmd_val(x)	((x).pmd)
-#define pgd_val(x)	((x).pgd)
-#define pgprot_val(x)	((x).pgprot)
-
-#define __pte(x)	((pte_t) { (x) } )
-#define __pmd(x)	((pmd_t) { (x) } )
-#define __pgd(x)	((pgd_t) { (x) } )
-#define __pgprot(x)	((pgprot_t) { (x) } )
-
-#else
-/*
- * .. while these make it easier on the compiler
- */
-typedef pte_basic_t pte_t;
-typedef unsigned long pmd_t;
-typedef unsigned long pgd_t;
-typedef unsigned long pgprot_t;
-
-#define pte_val(x)	(x)
-#define pmd_val(x)	(x)
-#define pgd_val(x)	(x)
-#define pgprot_val(x)	(x)
-
-#define __pte(x)	(x)
-#define __pmd(x)	(x)
-#define __pgd(x)	(x)
-#define __pgprot(x)	(x)
-
-#endif
-
-struct page;
-extern void clear_pages(void *page, int order);
-static inline void clear_page(void *page) { clear_pages(page, 0); }
-extern void copy_page(void *to, void *from);
-extern void clear_user_page(void *page, unsigned long vaddr, struct page *pg);
-extern void copy_user_page(void *to, void *from, unsigned long vaddr,
-			   struct page *pg);
-
-#ifndef CONFIG_APUS
-#define PPC_MEMSTART	0
-#define PPC_PGSTART	0
-#define PPC_MEMOFFSET	PAGE_OFFSET
-#else
-extern unsigned long ppc_memstart;
-extern unsigned long ppc_pgstart;
-extern unsigned long ppc_memoffset;
-#define PPC_MEMSTART	ppc_memstart
-#define PPC_PGSTART	ppc_pgstart
-#define PPC_MEMOFFSET	ppc_memoffset
-#endif
-
-#if defined(CONFIG_APUS) && !defined(MODULE)
-/* map phys->virtual and virtual->phys for RAM pages */
-static inline unsigned long ___pa(unsigned long v)
-{
-	unsigned long p;
-	asm volatile ("1: addis %0, %1, %2;"
-		      ".section \".vtop_fixup\",\"aw\";"
-		      ".align  1;"
-		      ".long   1b;"
-		      ".previous;"
-		      : "=r" (p)
-		      : "b" (v), "K" (((-PAGE_OFFSET) >> 16) & 0xffff));
-
-	return p;
-}
-static inline void* ___va(unsigned long p)
-{
-	unsigned long v;
-	asm volatile ("1: addis %0, %1, %2;"
-		      ".section \".ptov_fixup\",\"aw\";"
-		      ".align  1;"
-		      ".long   1b;"
-		      ".previous;"
-		      : "=r" (v)
-		      : "b" (p), "K" (((PAGE_OFFSET) >> 16) & 0xffff));
-
-	return (void*) v;
-}
-#else
-#define ___pa(vaddr) ((vaddr)-PPC_MEMOFFSET)
-#define ___va(paddr) ((paddr)+PPC_MEMOFFSET)
-#endif
-
-extern int page_is_ram(unsigned long pfn);
-
-#define __pa(x) ___pa((unsigned long)(x))
-#define __va(x) ((void *)(___va((unsigned long)(x))))
-
-#define pfn_to_page(pfn)	(mem_map + ((pfn) - PPC_PGSTART))
-#define page_to_pfn(page)	((unsigned long)((page) - mem_map) + PPC_PGSTART)
-#define virt_to_page(kaddr)	pfn_to_page(__pa(kaddr) >> PAGE_SHIFT)
-#define page_to_virt(page)	__va(page_to_pfn(page) << PAGE_SHIFT)
-
-#define pfn_valid(pfn)		(((pfn) - PPC_PGSTART) < max_mapnr)
-#define virt_addr_valid(kaddr)	pfn_valid(__pa(kaddr) >> PAGE_SHIFT)
-
-/* Pure 2^n version of get_order */
-extern __inline__ int get_order(unsigned long size)
-{
-	int lz;
-
-	size = (size-1) >> PAGE_SHIFT;
-	asm ("cntlzw %0,%1" : "=r" (lz) : "r" (size));
-	return 32 - lz;
-}
-
-#endif /* __ASSEMBLY__ */
-
-#define VM_DATA_DEFAULT_FLAGS	(VM_READ | VM_WRITE | VM_EXEC | \
-				 VM_MAYREAD | VM_MAYWRITE | VM_MAYEXEC)
-
-#endif /* __KERNEL__ */
-#endif /* _PPC_PAGE_H */
Index: kexec/include/asm-ppc64/page.h
===================================================================
--- kexec.orig/include/asm-ppc64/page.h
+++ /dev/null
@@ -1,333 +0,0 @@
-#ifndef _PPC64_PAGE_H
-#define _PPC64_PAGE_H
-
-/*
- * Copyright (C) 2001 PPC64 Team, IBM Corp
- *
- * 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 <asm/asm-compat.h>
-
-/*
- * We support either 4k or 64k software page size. When using 64k pages
- * however, wether we are really supporting 64k pages in HW or not is
- * irrelevant to those definitions. We always define HW_PAGE_SHIFT to 12
- * as use of 64k pages remains a linux kernel specific, every notion of
- * page number shared with the firmware, TCEs, iommu, etc... still assumes
- * a page size of 4096.
- */
-#ifdef CONFIG_PPC_64K_PAGES
-#define PAGE_SHIFT		16
-#else
-#define PAGE_SHIFT		12
-#endif
-
-#define PAGE_SIZE		(ASM_CONST(1) << PAGE_SHIFT)
-#define PAGE_MASK		(~(PAGE_SIZE-1))
-
-/* HW_PAGE_SHIFT is always 4k pages */
-#define HW_PAGE_SHIFT		12
-#define HW_PAGE_SIZE		(ASM_CONST(1) << HW_PAGE_SHIFT)
-#define HW_PAGE_MASK		(~(HW_PAGE_SIZE-1))
-
-/* PAGE_FACTOR is the number of bits factor between PAGE_SHIFT and
- * HW_PAGE_SHIFT, that is 4k pages
- */
-#define PAGE_FACTOR		(PAGE_SHIFT - HW_PAGE_SHIFT)
-
-/* Segment size */
-#define SID_SHIFT       	28
-#define SID_MASK        	0xfffffffffUL
-#define ESID_MASK		0xfffffffff0000000UL
-#define GET_ESID(x)     	(((x) >> SID_SHIFT) & SID_MASK)
-
-/* Large pages size */
-
-#ifndef __ASSEMBLY__
-extern unsigned int HPAGE_SHIFT;
-#define HPAGE_SIZE		((1UL) << HPAGE_SHIFT)
-#define HPAGE_MASK		(~(HPAGE_SIZE - 1))
-#define HUGETLB_PAGE_ORDER	(HPAGE_SHIFT - PAGE_SHIFT)
-#endif /* __ASSEMBLY__ */
-
-#ifdef CONFIG_HUGETLB_PAGE
-
-
-#define HTLB_AREA_SHIFT		40
-#define HTLB_AREA_SIZE		(1UL << HTLB_AREA_SHIFT)
-#define GET_HTLB_AREA(x)	((x) >> HTLB_AREA_SHIFT)
-
-#define LOW_ESID_MASK(addr, len)    (((1U << (GET_ESID(addr+len-1)+1)) \
-	   	                      - (1U << GET_ESID(addr))) & 0xffff)
-#define HTLB_AREA_MASK(addr, len)   (((1U << (GET_HTLB_AREA(addr+len-1)+1)) \
-	   	                      - (1U << GET_HTLB_AREA(addr))) & 0xffff)
-
-#define ARCH_HAS_HUGEPAGE_ONLY_RANGE
-#define ARCH_HAS_PREPARE_HUGEPAGE_RANGE
-#define ARCH_HAS_SETCLEAR_HUGE_PTE
-
-#define touches_hugepage_low_range(mm, addr, len) \
-	(LOW_ESID_MASK((addr), (len)) & (mm)->context.low_htlb_areas)
-#define touches_hugepage_high_range(mm, addr, len) \
-	(HTLB_AREA_MASK((addr), (len)) & (mm)->context.high_htlb_areas)
-
-#define __within_hugepage_low_range(addr, len, segmask) \
-	((LOW_ESID_MASK((addr), (len)) | (segmask)) == (segmask))
-#define within_hugepage_low_range(addr, len) \
-	__within_hugepage_low_range((addr), (len), \
-				    current->mm->context.low_htlb_areas)
-#define __within_hugepage_high_range(addr, len, zonemask) \
-	((HTLB_AREA_MASK((addr), (len)) | (zonemask)) == (zonemask))
-#define within_hugepage_high_range(addr, len) \
-	__within_hugepage_high_range((addr), (len), \
-				    current->mm->context.high_htlb_areas)
-
-#define is_hugepage_only_range(mm, addr, len) \
-	(touches_hugepage_high_range((mm), (addr), (len)) || \
-	  touches_hugepage_low_range((mm), (addr), (len)))
-#define HAVE_ARCH_HUGETLB_UNMAPPED_AREA
-
-#define in_hugepage_area(context, addr) \
-	(cpu_has_feature(CPU_FTR_16M_PAGE) && \
-	 ( ((1 << GET_HTLB_AREA(addr)) & (context).high_htlb_areas) || \
-	   ( ((addr) < 0x100000000L) && \
-	     ((1 << GET_ESID(addr)) & (context).low_htlb_areas) ) ) )
-
-#else /* !CONFIG_HUGETLB_PAGE */
-
-#define in_hugepage_area(mm, addr)	0
-
-#endif /* !CONFIG_HUGETLB_PAGE */
-
-/* align addr on a size boundary - adjust address up/down if needed */
-#define _ALIGN_UP(addr,size)	(((addr)+((size)-1))&(~((size)-1)))
-#define _ALIGN_DOWN(addr,size)	((addr)&(~((size)-1)))
-
-/* align addr on a size boundary - adjust address up if needed */
-#define _ALIGN(addr,size)     _ALIGN_UP(addr,size)
-
-/* to align the pointer to the (next) page boundary */
-#define PAGE_ALIGN(addr)	_ALIGN(addr, PAGE_SIZE)
-
-#ifdef __KERNEL__
-#ifndef __ASSEMBLY__
-#include <asm/cache.h>
-
-#undef STRICT_MM_TYPECHECKS
-
-#define REGION_SIZE   4UL
-#define REGION_SHIFT  60UL
-#define REGION_MASK   (((1UL<<REGION_SIZE)-1UL)<<REGION_SHIFT)
-
-static __inline__ void clear_page(void *addr)
-{
-	unsigned long lines, line_size;
-
-	line_size = ppc64_caches.dline_size;
-	lines = ppc64_caches.dlines_per_page;
-
-	__asm__ __volatile__(
-	"mtctr  	%1	# clear_page\n\
-1:      dcbz  	0,%0\n\
-	add	%0,%0,%3\n\
-	bdnz+	1b"
-        : "=r" (addr)
-        : "r" (lines), "0" (addr), "r" (line_size)
-	: "ctr", "memory");
-}
-
-extern void copy_4K_page(void *to, void *from);
-
-#ifdef CONFIG_PPC_64K_PAGES
-static inline void copy_page(void *to, void *from)
-{
-	unsigned int i;
-	for (i=0; i < (1 << (PAGE_SHIFT - 12)); i++) {
-		copy_4K_page(to, from);
-		to += 4096;
-		from += 4096;
-	}
-}
-#else /* CONFIG_PPC_64K_PAGES */
-static inline void copy_page(void *to, void *from)
-{
-	copy_4K_page(to, from);
-}
-#endif /* CONFIG_PPC_64K_PAGES */
-
-struct page;
-extern void clear_user_page(void *page, unsigned long vaddr, struct page *pg);
-extern void copy_user_page(void *to, void *from, unsigned long vaddr, struct page *p);
-
-#ifdef STRICT_MM_TYPECHECKS
-/*
- * These are used to make use of C type-checking.  
- * Entries in the pte table are 64b, while entries in the pgd & pmd are 32b.
- */
-
-/* PTE level */
-typedef struct { unsigned long pte; } pte_t;
-#define pte_val(x)	((x).pte)
-#define __pte(x)	((pte_t) { (x) })
-
-/* 64k pages additionally define a bigger "real PTE" type that gathers
- * the "second half" part of the PTE for pseudo 64k pages
- */
-#ifdef CONFIG_PPC_64K_PAGES
-typedef struct { pte_t pte; unsigned long hidx; } real_pte_t;
-#else
-typedef struct { pte_t pte; } real_pte_t;
-#endif
-
-/* PMD level */
-typedef struct { unsigned long pmd; } pmd_t;
-#define pmd_val(x)	((x).pmd)
-#define __pmd(x)	((pmd_t) { (x) })
-
-/* PUD level exusts only on 4k pages */
-#ifndef CONFIG_PPC_64K_PAGES
-typedef struct { unsigned long pud; } pud_t;
-#define pud_val(x)	((x).pud)
-#define __pud(x)	((pud_t) { (x) })
-#endif
-
-/* PGD level */
-typedef struct { unsigned long pgd; } pgd_t;
-#define pgd_val(x)	((x).pgd)
-#define __pgd(x)	((pgd_t) { (x) })
-
-/* Page protection bits */
-typedef struct { unsigned long pgprot; } pgprot_t;
-#define pgprot_val(x)	((x).pgprot)
-#define __pgprot(x)	((pgprot_t) { (x) })
-
-#else
-
-/*
- * .. while these make it easier on the compiler
- */
-
-typedef unsigned long pte_t;
-#define pte_val(x)	(x)
-#define __pte(x)	(x)
-
-#ifdef CONFIG_PPC_64K_PAGES
-typedef struct { pte_t pte; unsigned long hidx; } real_pte_t;
-#else
-typedef unsigned long real_pte_t;
-#endif
-
-
-typedef unsigned long pmd_t;
-#define pmd_val(x)	(x)
-#define __pmd(x)	(x)
-
-#ifndef CONFIG_PPC_64K_PAGES
-typedef unsigned long pud_t;
-#define pud_val(x)	(x)
-#define __pud(x)	(x)
-#endif
-
-typedef unsigned long pgd_t;
-#define pgd_val(x)	(x)
-#define pgprot_val(x)	(x)
-
-typedef unsigned long pgprot_t;
-#define __pgd(x)	(x)
-#define __pgprot(x)	(x)
-
-#endif
-
-#define __pa(x) ((unsigned long)(x)-PAGE_OFFSET)
-
-extern int page_is_ram(unsigned long pfn);
-
-extern u64 ppc64_pft_size;		/* Log 2 of page table size */
-
-/* We do define AT_SYSINFO_EHDR but don't use the gate mecanism */
-#define __HAVE_ARCH_GATE_AREA		1
-
-#endif /* __ASSEMBLY__ */
-
-#ifdef MODULE
-#define __page_aligned __attribute__((__aligned__(PAGE_SIZE)))
-#else
-#define __page_aligned \
-	__attribute__((__aligned__(PAGE_SIZE), \
-		__section__(".data.page_aligned")))
-#endif
-
-
-/* This must match the -Ttext linker address            */
-/* Note: tophys & tovirt make assumptions about how     */
-/*       KERNELBASE is defined for performance reasons. */
-/*       When KERNELBASE moves, those macros may have   */
-/*             to change!                               */
-#define PAGE_OFFSET     ASM_CONST(0xC000000000000000)
-#define KERNELBASE      PAGE_OFFSET
-#define VMALLOCBASE     ASM_CONST(0xD000000000000000)
-
-#define VMALLOC_REGION_ID  (VMALLOCBASE >> REGION_SHIFT)
-#define KERNEL_REGION_ID   (KERNELBASE >> REGION_SHIFT)
-#define USER_REGION_ID     (0UL)
-#define REGION_ID(ea)	   (((unsigned long)(ea)) >> REGION_SHIFT)
-
-#define __va(x) ((void *)((unsigned long)(x) + KERNELBASE))
-
-#ifdef CONFIG_DISCONTIGMEM
-#define page_to_pfn(page)	discontigmem_page_to_pfn(page)
-#define pfn_to_page(pfn)	discontigmem_pfn_to_page(pfn)
-#define pfn_valid(pfn)		discontigmem_pfn_valid(pfn)
-#endif
-#ifdef CONFIG_FLATMEM
-#define pfn_to_page(pfn)	(mem_map + (pfn))
-#define page_to_pfn(page)	((unsigned long)((page) - mem_map))
-#define pfn_valid(pfn)		((pfn) < max_mapnr)
-#endif
-
-#define virt_to_page(kaddr)	pfn_to_page(__pa(kaddr) >> PAGE_SHIFT)
-#define pfn_to_kaddr(pfn)	__va((pfn) << PAGE_SHIFT)
-
-#define virt_addr_valid(kaddr)	pfn_valid(__pa(kaddr) >> PAGE_SHIFT)
-
-/*
- * Unfortunately the PLT is in the BSS in the PPC32 ELF ABI,
- * and needs to be executable.  This means the whole heap ends
- * up being executable.
- */
-#define VM_DATA_DEFAULT_FLAGS32	(VM_READ | VM_WRITE | VM_EXEC | \
-				 VM_MAYREAD | VM_MAYWRITE | VM_MAYEXEC)
-
-#define VM_DATA_DEFAULT_FLAGS64	(VM_READ | VM_WRITE | \
-				 VM_MAYREAD | VM_MAYWRITE | VM_MAYEXEC)
-
-#define VM_DATA_DEFAULT_FLAGS \
-	(test_thread_flag(TIF_32BIT) ? \
-	 VM_DATA_DEFAULT_FLAGS32 : VM_DATA_DEFAULT_FLAGS64)
-
-/*
- * This is the default if a program doesn't have a PT_GNU_STACK
- * program header entry. The PPC64 ELF ABI has a non executable stack
- * stack by default, so in the absense of a PT_GNU_STACK program header
- * we turn execute permission off.
- */
-#define VM_STACK_DEFAULT_FLAGS32	(VM_READ | VM_WRITE | VM_EXEC | \
-					 VM_MAYREAD | VM_MAYWRITE | VM_MAYEXEC)
-
-#define VM_STACK_DEFAULT_FLAGS64	(VM_READ | VM_WRITE | \
-					 VM_MAYREAD | VM_MAYWRITE | VM_MAYEXEC)
-
-#define VM_STACK_DEFAULT_FLAGS \
-	(test_thread_flag(TIF_32BIT) ? \
-	 VM_STACK_DEFAULT_FLAGS32 : VM_STACK_DEFAULT_FLAGS64)
-
-#endif /* __KERNEL__ */
-
-#include <asm-generic/page.h>
-
-#endif /* _PPC64_PAGE_H */
Index: kexec/arch/ppc64/Kconfig
===================================================================
--- kexec.orig/arch/ppc64/Kconfig
+++ kexec/arch/ppc64/Kconfig
@@ -291,6 +291,11 @@ config ARCH_SPARSEMEM_ENABLE
 	def_bool y
 	depends on ARCH_DISCONTIGMEM_ENABLE
 
+# Hack to make ARCH=ppc64 work with asm-powerpc/page.h
+config KERNEL_START
+        hex
+        default "0xc000000000000000"
+
 source "mm/Kconfig"
 
 config HAVE_ARCH_EARLY_PFN_TO_NID



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