Merge http://ftp.arm.linux.org.uk/pub/linux/arm/kernel/git-cur/linux-2.6-arm into for-rmk

1 files changed, 185 insertions, 0 deletions

diff --git a/arch/powerpc/include/asm/page_64.h b/arch/powerpc/include/asm/page_64.h
new file mode 100644
index 000000000000..043bfdfe4f73
--- /dev/null
+++ b/arch/powerpc/include/asm/page_64.h
@@ -0,0 +1,185 @@
+#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)
+
+/* Segment size; normal 256M segments */
+#define SID_SHIFT		28
+#define SID_MASK		ASM_CONST(0xfffffffff)
+#define ESID_MASK		0xfffffffff0000000UL
+#define GET_ESID(x)		(((x) >> SID_SHIFT) & SID_MASK)
+
+/* 1T segments */
+#define SID_SHIFT_1T		40
+#define SID_MASK_1T		0xffffffUL
+#define ESID_MASK_1T		0xffffff0000000000UL
+#define GET_ESID_1T(x)		(((x) >> SID_SHIFT_1T) & SID_MASK_1T)
+
+#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;
+
+/* Large pages size */
+#ifdef CONFIG_HUGETLB_PAGE
+extern unsigned int HPAGE_SHIFT;
+#else
+#define HPAGE_SHIFT PAGE_SHIFT
+#endif
+#define HPAGE_SIZE		((1UL) << HPAGE_SHIFT)
+#define HPAGE_MASK		(~(HPAGE_SIZE - 1))
+#define HUGETLB_PAGE_ORDER	(HPAGE_SHIFT - PAGE_SHIFT)
+#define HUGE_MAX_HSTATE		3
+
+#endif /* __ASSEMBLY__ */
+
+#ifdef CONFIG_PPC_MM_SLICES
+
+#define SLICE_LOW_SHIFT		28
+#define SLICE_HIGH_SHIFT	40
+
+#define SLICE_LOW_TOP		(0x100000000ul)
+#define SLICE_NUM_LOW		(SLICE_LOW_TOP >> SLICE_LOW_SHIFT)
+#define SLICE_NUM_HIGH		(PGTABLE_RANGE >> SLICE_HIGH_SHIFT)
+
+#define GET_LOW_SLICE_INDEX(addr)	((addr) >> SLICE_LOW_SHIFT)
+#define GET_HIGH_SLICE_INDEX(addr)	((addr) >> SLICE_HIGH_SHIFT)
+
+#ifndef __ASSEMBLY__
+
+struct slice_mask {
+	u16 low_slices;
+	u16 high_slices;
+};
+
+struct mm_struct;
+
+extern unsigned long slice_get_unmapped_area(unsigned long addr,
+					     unsigned long len,
+					     unsigned long flags,
+					     unsigned int psize,
+					     int topdown,
+					     int use_cache);
+
+extern unsigned int get_slice_psize(struct mm_struct *mm,
+				    unsigned long addr);
+
+extern void slice_init_context(struct mm_struct *mm, unsigned int psize);
+extern void slice_set_user_psize(struct mm_struct *mm, unsigned int psize);
+extern void slice_set_range_psize(struct mm_struct *mm, unsigned long start,
+				  unsigned long len, unsigned int psize);
+
+#define slice_mm_new_context(mm)	((mm)->context.id == 0)
+
+#endif /* __ASSEMBLY__ */
+#else
+#define slice_init()
+#define get_slice_psize(mm, addr)	((mm)->context.user_psize)
+#define slice_set_user_psize(mm, psize)		\
+do {						\
+	(mm)->context.user_psize = (psize);	\
+	(mm)->context.sllp = SLB_VSID_USER | mmu_psize_defs[(psize)].sllp; \
+} while (0)
+#define slice_set_range_psize(mm, start, len, psize)	\
+	slice_set_user_psize((mm), (psize))
+#define slice_mm_new_context(mm)	1
+#endif /* CONFIG_PPC_MM_SLICES */
+
+#ifdef CONFIG_HUGETLB_PAGE
+
+#define HAVE_ARCH_HUGETLB_UNMAPPED_AREA
+
+#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 */