Merge branch 'page_colouring_despair' (541c5477) · Commits · e / devices / android_kernel_sony_msm8994

arch/sh/mm/clear_page.S

+0 −45

Original line number	Diff line number	Diff line
		@@ -150,48 +150,3 @@ ENTRY(__clear_user)
		.long 8b, .Lbad_clear_user
		.long 9b, .Lbad_clear_user
		.previous

		#if defined(CONFIG_CPU_SH4)
		/*
		* __clear_user_page
		* @to: P3 address (with same color)
		* @orig_to: P1 address
		*
		* void __clear_user_page(void to, void orig_to)
		*/

		/*
		* r0 --- scratch
		* r4 --- to
		* r5 --- orig_to
		* r6 --- to + PAGE_SIZE
		*/
		ENTRY(__clear_user_page)
		mov.l .Lpsz,r0
		mov r4,r6
		add r0,r6
		mov #0,r0
		!
		1: ocbi @r5
		add #32,r5
		movca.l r0,@r4
		mov r4,r1
		add #32,r4
		mov.l r0,@-r4
		mov.l r0,@-r4
		mov.l r0,@-r4
		mov.l r0,@-r4
		mov.l r0,@-r4
		mov.l r0,@-r4
		mov.l r0,@-r4
		add #28,r4
		cmp/eq r6,r4
		bf/s 1b
		ocbwb @r1
		!
		rts
		nop
		.Lpsz: .long PAGE_SIZE

		#endif

arch/sh/mm/copy_page.S

+0 −61

Original line number	Diff line number	Diff line
		@@ -68,67 +68,6 @@ ENTRY(copy_page_slow)
		rts
		nop

		#if defined(CONFIG_CPU_SH4)
		/*
		* __copy_user_page
		* @to: P1 address (with same color)
		* @from: P1 address
		* @orig_to: P1 address
		*
		* void __copy_user_page(void to, void from, void *orig_to)
		*/

		/*
		* r0, r1, r2, r3, r4, r5, r6, r7 --- scratch
		* r8 --- from + PAGE_SIZE
		* r9 --- orig_to
		* r10 --- to
		* r11 --- from
		*/
		ENTRY(__copy_user_page)
		mov.l r8,@-r15
		mov.l r9,@-r15
		mov.l r10,@-r15
		mov.l r11,@-r15
		mov r4,r10
		mov r5,r11
		mov r6,r9
		mov r5,r8
		mov.l .Lpsz,r0
		add r0,r8
		!
		1: ocbi @r9
		add #32,r9
		mov.l @r11+,r0
		mov.l @r11+,r1
		mov.l @r11+,r2
		mov.l @r11+,r3
		mov.l @r11+,r4
		mov.l @r11+,r5
		mov.l @r11+,r6
		mov.l @r11+,r7
		movca.l r0,@r10
		mov r10,r0
		add #32,r10
		mov.l r7,@-r10
		mov.l r6,@-r10
		mov.l r5,@-r10
		mov.l r4,@-r10
		mov.l r3,@-r10
		mov.l r2,@-r10
		mov.l r1,@-r10
		ocbwb @r0
		cmp/eq r11,r8
		bf/s 1b
		add #28,r10
		!
		mov.l @r15+,r11
		mov.l @r15+,r10
		mov.l @r15+,r9
		mov.l @r15+,r8
		rts
		nop
		#endif
		.align 2
		.Lpsz: .long PAGE_SIZE
		/*

arch/sh/mm/pg-sh4.c

+52 −23

Original line number	Diff line number	Diff line
		@@ -9,6 +9,8 @@
		#include <linux/mm.h>
		#include <linux/mutex.h>
		#include <linux/fs.h>
		#include <linux/highmem.h>
		#include <linux/module.h>
		#include <asm/mmu_context.h>
		#include <asm/cacheflush.h>

		@@ -50,34 +52,61 @@ static inline void kunmap_coherent(struct page *page)
		void clear_user_page(void to, unsigned long address, struct page page)
		{
		__set_bit(PG_mapped, &page->flags);
		if (((address ^ (unsigned long)to) & CACHE_ALIAS) == 0)

		clear_page(to);
		else {
		void *vto = kmap_coherent(page, address);
		__clear_user_page(vto, to);
		kunmap_coherent(vto);
		if ((((address & PAGE_MASK) ^ (unsigned long)to) & CACHE_ALIAS))
		__flush_wback_region(to, PAGE_SIZE);
		}

		void copy_to_user_page(struct vm_area_struct vma, struct page page,
		unsigned long vaddr, void dst, const void src,
		unsigned long len)
		{
		void *vto;

		__set_bit(PG_mapped, &page->flags);

		vto = kmap_coherent(page, vaddr) + (vaddr & ~PAGE_MASK);
		memcpy(vto, src, len);
		kunmap_coherent(vto);

		if (vma->vm_flags & VM_EXEC)
		flush_cache_page(vma, vaddr, page_to_pfn(page));
		}

		/*
		* copy_user_page
		* @to: P1 address
		* @from: P1 address
		* @address: U0 address to be mapped
		* @page: page (virt_to_page(to))
		*/
		void copy_user_page(void to, void from, unsigned long address,
		struct page *page)
		void copy_from_user_page(struct vm_area_struct vma, struct page page,
		unsigned long vaddr, void dst, const void src,
		unsigned long len)
		{
		void *vfrom;

		__set_bit(PG_mapped, &page->flags);
		if (((address ^ (unsigned long)to) & CACHE_ALIAS) == 0)
		copy_page(to, from);
		else {
		void *vfrom = kmap_coherent(page, address);
		__copy_user_page(vfrom, from, to);

		vfrom = kmap_coherent(page, vaddr) + (vaddr & ~PAGE_MASK);
		memcpy(dst, vfrom, len);
		kunmap_coherent(vfrom);
		}

		void copy_user_highpage(struct page to, struct page from,
		unsigned long vaddr, struct vm_area_struct *vma)
		{
		void vfrom, vto;

		__set_bit(PG_mapped, &to->flags);

		vto = kmap_atomic(to, KM_USER1);
		vfrom = kmap_coherent(from, vaddr);
		copy_page(vto, vfrom);
		kunmap_coherent(vfrom);

		if (((vaddr ^ (unsigned long)vto) & CACHE_ALIAS))
		__flush_wback_region(vto, PAGE_SIZE);

		kunmap_atomic(vto, KM_USER1);
		/* Make sure this page is cleared on other CPU's too before using it */
		smp_wmb();
		}
		EXPORT_SYMBOL(copy_user_highpage);

		/*
		* For SH-4, we have our own implementation for ptep_get_and_clear

include/asm-sh/cacheflush.h

+14 −4

Original line number	Diff line number	Diff line
		@@ -43,9 +43,15 @@ extern void __flush_purge_region(void *start, int size);
		extern void __flush_invalidate_region(void *start, int size);
		#endif

		#define flush_cache_vmap(start, end) flush_cache_all()
		#define flush_cache_vunmap(start, end) flush_cache_all()
		#ifdef CONFIG_CPU_SH4
		extern void copy_to_user_page(struct vm_area_struct *vma,
		struct page page, unsigned long vaddr, void dst, const void *src,
		unsigned long len);

		extern void copy_from_user_page(struct vm_area_struct *vma,
		struct page page, unsigned long vaddr, void dst, const void *src,
		unsigned long len);
		#else
		#define copy_to_user_page(vma, page, vaddr, dst, src, len) \
		do { \
		flush_cache_page(vma, vaddr, page_to_pfn(page));\
		@@ -58,6 +64,10 @@ extern void __flush_invalidate_region(void *start, int size);
		flush_cache_page(vma, vaddr, page_to_pfn(page));\
		memcpy(dst, src, len); \
		} while (0)
		#endif

		#define flush_cache_vmap(start, end) flush_cache_all()
		#define flush_cache_vunmap(start, end) flush_cache_all()

		#define HAVE_ARCH_UNMAPPED_AREA

include/asm-sh/page.h

+7 −4

Original line number	Diff line number	Diff line
		@@ -73,10 +73,13 @@ extern void copy_page_nommu(void to, void from);
		#if !defined(CONFIG_CACHE_OFF) && defined(CONFIG_MMU) && \
		(defined(CONFIG_CPU_SH4) \|\| defined(CONFIG_SH7705_CACHE_32KB))
		struct page;
		extern void clear_user_page(void to, unsigned long address, struct page pg);
		extern void copy_user_page(void to, void from, unsigned long address, struct page *pg);
		extern void __clear_user_page(void to, void orig_to);
		extern void __copy_user_page(void to, void from, void *orig_to);
		struct vm_area_struct;
		extern void clear_user_page(void to, unsigned long address, struct page page);
		#ifdef CONFIG_CPU_SH4
		extern void copy_user_highpage(struct page to, struct page from,
		unsigned long vaddr, struct vm_area_struct *vma);
		#define __HAVE_ARCH_COPY_USER_HIGHPAGE
		#endif
		#else
		#define clear_user_page(page, vaddr, pg) clear_page(page)
		#define copy_user_page(to, from, vaddr, pg) copy_page(to, from)