1 files changed, 0 insertions, 341 deletions
diff --git a/ANDROID_3.4.5/arch/arm/mm/flush.c b/ANDROID_3.4.5/arch/arm/mm/flush.c
deleted file mode 100644
index 77458548..00000000
--- a/ANDROID_3.4.5/arch/arm/mm/flush.c
+++ /dev/null
@@ -1,341 +0,0 @@
-/*
- *  linux/arch/arm/mm/flush.c
- *
- *  Copyright (C) 1995-2002 Russell King
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License version 2 as
- * published by the Free Software Foundation.
- */
-#include <linux/module.h>
-#include <linux/mm.h>
-#include <linux/pagemap.h>
-#include <linux/highmem.h>
-
-#include <asm/cacheflush.h>
-#include <asm/cachetype.h>
-#include <asm/highmem.h>
-#include <asm/smp_plat.h>
-#include <asm/tlbflush.h>
-
-#include "mm.h"
-
-#ifdef CONFIG_CPU_CACHE_VIPT
-
-static void flush_pfn_alias(unsigned long pfn, unsigned long vaddr)
-{
-	unsigned long to = FLUSH_ALIAS_START + (CACHE_COLOUR(vaddr) << PAGE_SHIFT);
-	const int zero = 0;
-
-	set_top_pte(to, pfn_pte(pfn, PAGE_KERNEL));
-
-	asm(	"mcrr	p15, 0, %1, %0, c14\n"
-	"	mcr	p15, 0, %2, c7, c10, 4"
-	    :
-	    : "r" (to), "r" (to + PAGE_SIZE - L1_CACHE_BYTES), "r" (zero)
-	    : "cc");
-}
-
-static void flush_icache_alias(unsigned long pfn, unsigned long vaddr, unsigned long len)
-{
-	unsigned long va = FLUSH_ALIAS_START + (CACHE_COLOUR(vaddr) << PAGE_SHIFT);
-	unsigned long offset = vaddr & (PAGE_SIZE - 1);
-	unsigned long to;
-
-	set_top_pte(va, pfn_pte(pfn, PAGE_KERNEL));
-	to = va + offset;
-	flush_icache_range(to, to + len);
-}
-
-void flush_cache_mm(struct mm_struct *mm)
-{
-	if (cache_is_vivt()) {
-		vivt_flush_cache_mm(mm);
-		return;
-	}
-
-	if (cache_is_vipt_aliasing()) {
-		asm(	"mcr	p15, 0, %0, c7, c14, 0\n"
-		"	mcr	p15, 0, %0, c7, c10, 4"
-		    :
-		    : "r" (0)
-		    : "cc");
-	}
-}
-
-void flush_cache_range(struct vm_area_struct *vma, unsigned long start, unsigned long end)
-{
-	if (cache_is_vivt()) {
-		vivt_flush_cache_range(vma, start, end);
-		return;
-	}
-
-	if (cache_is_vipt_aliasing()) {
-		asm(	"mcr	p15, 0, %0, c7, c14, 0\n"
-		"	mcr	p15, 0, %0, c7, c10, 4"
-		    :
-		    : "r" (0)
-		    : "cc");
-	}
-
-	if (vma->vm_flags & VM_EXEC)
-		__flush_icache_all();
-}
-
-void flush_cache_page(struct vm_area_struct *vma, unsigned long user_addr, unsigned long pfn)
-{
-	if (cache_is_vivt()) {
-		vivt_flush_cache_page(vma, user_addr, pfn);
-		return;
-	}
-
-	if (cache_is_vipt_aliasing()) {
-		flush_pfn_alias(pfn, user_addr);
-		__flush_icache_all();
-	}
-
-	if (vma->vm_flags & VM_EXEC && icache_is_vivt_asid_tagged())
-		__flush_icache_all();
-}
-
-#else
-#define flush_pfn_alias(pfn,vaddr)		do { } while (0)
-#define flush_icache_alias(pfn,vaddr,len)	do { } while (0)
-#endif
-
-static void flush_ptrace_access_other(void *args)
-{
-	__flush_icache_all();
-}
-
-static
-void flush_ptrace_access(struct vm_area_struct *vma, struct page *page,
-			 unsigned long uaddr, void *kaddr, unsigned long len)
-{
-	if (cache_is_vivt()) {
-		if (cpumask_test_cpu(smp_processor_id(), mm_cpumask(vma->vm_mm))) {
-			unsigned long addr = (unsigned long)kaddr;
-			__cpuc_coherent_kern_range(addr, addr + len);
-		}
-		return;
-	}
-
-	if (cache_is_vipt_aliasing()) {
-		flush_pfn_alias(page_to_pfn(page), uaddr);
-		__flush_icache_all();
-		return;
-	}
-
-	/* VIPT non-aliasing D-cache */
-	if (vma->vm_flags & VM_EXEC) {
-		unsigned long addr = (unsigned long)kaddr;
-		if (icache_is_vipt_aliasing())
-			flush_icache_alias(page_to_pfn(page), uaddr, len);
-		else
-			__cpuc_coherent_kern_range(addr, addr + len);
-		if (cache_ops_need_broadcast())
-			smp_call_function(flush_ptrace_access_other,
-					  NULL, 1);
-	}
-}
-
-/*
- * Copy user data from/to a page which is mapped into a different
- * processes address space.  Really, we want to allow our "user
- * space" model to handle this.
- *
- * Note that this code needs to run on the current CPU.
- */
-void copy_to_user_page(struct vm_area_struct *vma, struct page *page,
-		       unsigned long uaddr, void *dst, const void *src,
-		       unsigned long len)
-{
-#ifdef CONFIG_SMP
-	preempt_disable();
-#endif
-	memcpy(dst, src, len);
-	flush_ptrace_access(vma, page, uaddr, dst, len);
-#ifdef CONFIG_SMP
-	preempt_enable();
-#endif
-}
-
-void __flush_dcache_page(struct address_space *mapping, struct page *page)
-{
-	/*
-	 * Writeback any data associated with the kernel mapping of this
-	 * page.  This ensures that data in the physical page is mutually
-	 * coherent with the kernels mapping.
-	 */
-	if (!PageHighMem(page)) {
-		__cpuc_flush_dcache_area(page_address(page), PAGE_SIZE);
-	} else {
-		void *addr = kmap_high_get(page);
-		if (addr) {
-			__cpuc_flush_dcache_area(addr, PAGE_SIZE);
-			kunmap_high(page);
-		} else if (cache_is_vipt()) {
-			/* unmapped pages might still be cached */
-			addr = kmap_atomic(page);
-			__cpuc_flush_dcache_area(addr, PAGE_SIZE);
-			kunmap_atomic(addr);
-		}
-	}
-
-	/*
-	 * If this is a page cache page, and we have an aliasing VIPT cache,
-	 * we only need to do one flush - which would be at the relevant
-	 * userspace colour, which is congruent with page->index.
-	 */
-	if (mapping && cache_is_vipt_aliasing())
-		flush_pfn_alias(page_to_pfn(page),
-				page->index << PAGE_CACHE_SHIFT);
-}
-
-static void __flush_dcache_aliases(struct address_space *mapping, struct page *page)
-{
-	struct mm_struct *mm = current->active_mm;
-	struct vm_area_struct *mpnt;
-	struct prio_tree_iter iter;
-	pgoff_t pgoff;
-
-	/*
-	 * There are possible user space mappings of this page:
-	 * - VIVT cache: we need to also write back and invalidate all user
-	 *   data in the current VM view associated with this page.
-	 * - aliasing VIPT: we only need to find one mapping of this page.
-	 */
-	pgoff = page->index << (PAGE_CACHE_SHIFT - PAGE_SHIFT);
-
-	flush_dcache_mmap_lock(mapping);
-	vma_prio_tree_foreach(mpnt, &iter, &mapping->i_mmap, pgoff, pgoff) {
-		unsigned long offset;
-
-		/*
-		 * If this VMA is not in our MM, we can ignore it.
-		 */
-		if (mpnt->vm_mm != mm)
-			continue;
-		if (!(mpnt->vm_flags & VM_MAYSHARE))
-			continue;
-		offset = (pgoff - mpnt->vm_pgoff) << PAGE_SHIFT;
-		flush_cache_page(mpnt, mpnt->vm_start + offset, page_to_pfn(page));
-	}
-	flush_dcache_mmap_unlock(mapping);
-}
-
-#if __LINUX_ARM_ARCH__ >= 6
-void __sync_icache_dcache(pte_t pteval)
-{
-	unsigned long pfn;
-	struct page *page;
-	struct address_space *mapping;
-
-	if (!pte_present_user(pteval))
-		return;
-	if (cache_is_vipt_nonaliasing() && !pte_exec(pteval))
-		/* only flush non-aliasing VIPT caches for exec mappings */
-		return;
-	pfn = pte_pfn(pteval);
-	if (!pfn_valid(pfn))
-		return;
-
-	page = pfn_to_page(pfn);
-	if (cache_is_vipt_aliasing())
-		mapping = page_mapping(page);
-	else
-		mapping = NULL;
-
-	if (!test_and_set_bit(PG_dcache_clean, &page->flags))
-		__flush_dcache_page(mapping, page);
-
-	if (pte_exec(pteval))
-		__flush_icache_all();
-}
-#endif
-
-/*
- * Ensure cache coherency between kernel mapping and userspace mapping
- * of this page.
- *
- * We have three cases to consider:
- *  - VIPT non-aliasing cache: fully coherent so nothing required.
- *  - VIVT: fully aliasing, so we need to handle every alias in our
- *          current VM view.
- *  - VIPT aliasing: need to handle one alias in our current VM view.
- *
- * If we need to handle aliasing:
- *  If the page only exists in the page cache and there are no user
- *  space mappings, we can be lazy and remember that we may have dirty
- *  kernel cache lines for later.  Otherwise, we assume we have
- *  aliasing mappings.
- *
- * Note that we disable the lazy flush for SMP configurations where
- * the cache maintenance operations are not automatically broadcasted.
- */
-void flush_dcache_page(struct page *page)
-{
-	struct address_space *mapping;
-
-	/*
-	 * The zero page is never written to, so never has any dirty
-	 * cache lines, and therefore never needs to be flushed.
-	 */
-	if (page == ZERO_PAGE(0))
-		return;
-
-	mapping = page_mapping(page);
-
-	if (!cache_ops_need_broadcast() &&
-	    mapping && !mapping_mapped(mapping))
-		clear_bit(PG_dcache_clean, &page->flags);
-	else {
-		__flush_dcache_page(mapping, page);
-		if (mapping && cache_is_vivt())
-			__flush_dcache_aliases(mapping, page);
-		else if (mapping)
-			__flush_icache_all();
-		set_bit(PG_dcache_clean, &page->flags);
-	}
-}
-EXPORT_SYMBOL(flush_dcache_page);
-
-/*
- * Flush an anonymous page so that users of get_user_pages()
- * can safely access the data.  The expected sequence is:
- *
- *  get_user_pages()
- *    -> flush_anon_page
- *  memcpy() to/from page
- *  if written to page, flush_dcache_page()
- */
-void __flush_anon_page(struct vm_area_struct *vma, struct page *page, unsigned long vmaddr)
-{
-	unsigned long pfn;
-
-	/* VIPT non-aliasing caches need do nothing */
-	if (cache_is_vipt_nonaliasing())
-		return;
-
-	/*
-	 * Write back and invalidate userspace mapping.
-	 */
-	pfn = page_to_pfn(page);
-	if (cache_is_vivt()) {
-		flush_cache_page(vma, vmaddr, pfn);
-	} else {
-		/*
-		 * For aliasing VIPT, we can flush an alias of the
-		 * userspace address only.
-		 */
-		flush_pfn_alias(pfn, vmaddr);
-		__flush_icache_all();
-	}
-
-	/*
-	 * Invalidate kernel mapping.  No data should be contained
-	 * in this mapping of the page.  FIXME: this is overkill
-	 * since we actually ask for a write-back and invalidate.
-	 */
-	__cpuc_flush_dcache_area(page_address(page), PAGE_SIZE);
-}