Merge branch 'page_colouring_despair'
This commit is contained in:
Paul Mundt
commit
541c547731
5 changed files with 73 additions and 137 deletions
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@ -150,48 +150,3 @@ ENTRY(__clear_user)
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.long 8b, .Lbad_clear_user
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.long 9b, .Lbad_clear_user
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.previous
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#if defined(CONFIG_CPU_SH4)
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/*
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* __clear_user_page
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* @to: P3 address (with same color)
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* @orig_to: P1 address
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*
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* void __clear_user_page(void *to, void *orig_to)
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*/
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/*
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* r0 --- scratch
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* r4 --- to
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* r5 --- orig_to
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* r6 --- to + PAGE_SIZE
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*/
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ENTRY(__clear_user_page)
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mov.l .Lpsz,r0
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mov r4,r6
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add r0,r6
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mov #0,r0
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!
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1: ocbi @r5
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add #32,r5
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movca.l r0,@r4
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mov r4,r1
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add #32,r4
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mov.l r0,@-r4
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mov.l r0,@-r4
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mov.l r0,@-r4
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mov.l r0,@-r4
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mov.l r0,@-r4
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mov.l r0,@-r4
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mov.l r0,@-r4
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add #28,r4
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cmp/eq r6,r4
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bf/s 1b
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ocbwb @r1
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!
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rts
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nop
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.Lpsz: .long PAGE_SIZE
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#endif
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@ -68,67 +68,6 @@ ENTRY(copy_page_slow)
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rts
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nop
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#if defined(CONFIG_CPU_SH4)
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/*
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* __copy_user_page
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* @to: P1 address (with same color)
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* @from: P1 address
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* @orig_to: P1 address
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*
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* void __copy_user_page(void *to, void *from, void *orig_to)
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*/
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/*
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* r0, r1, r2, r3, r4, r5, r6, r7 --- scratch
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* r8 --- from + PAGE_SIZE
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* r9 --- orig_to
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* r10 --- to
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* r11 --- from
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*/
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ENTRY(__copy_user_page)
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mov.l r8,@-r15
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mov.l r9,@-r15
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mov.l r10,@-r15
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mov.l r11,@-r15
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mov r4,r10
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mov r5,r11
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mov r6,r9
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mov r5,r8
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mov.l .Lpsz,r0
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add r0,r8
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!
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1: ocbi @r9
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add #32,r9
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mov.l @r11+,r0
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mov.l @r11+,r1
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mov.l @r11+,r2
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mov.l @r11+,r3
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mov.l @r11+,r4
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mov.l @r11+,r5
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mov.l @r11+,r6
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mov.l @r11+,r7
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movca.l r0,@r10
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mov r10,r0
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add #32,r10
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mov.l r7,@-r10
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mov.l r6,@-r10
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mov.l r5,@-r10
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mov.l r4,@-r10
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mov.l r3,@-r10
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mov.l r2,@-r10
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mov.l r1,@-r10
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ocbwb @r0
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cmp/eq r11,r8
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bf/s 1b
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add #28,r10
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!
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mov.l @r15+,r11
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mov.l @r15+,r10
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mov.l @r15+,r9
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mov.l @r15+,r8
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rts
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nop
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#endif
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.align 2
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.Lpsz: .long PAGE_SIZE
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/*
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@ -9,6 +9,8 @@
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#include <linux/mm.h>
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#include <linux/mutex.h>
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#include <linux/fs.h>
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#include <linux/highmem.h>
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#include <linux/module.h>
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#include <asm/mmu_context.h>
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#include <asm/cacheflush.h>
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@ -50,35 +52,62 @@ static inline void kunmap_coherent(struct page *page)
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void clear_user_page(void *to, unsigned long address, struct page *page)
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{
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__set_bit(PG_mapped, &page->flags);
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if (((address ^ (unsigned long)to) & CACHE_ALIAS) == 0)
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clear_page(to);
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else {
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void *vto = kmap_coherent(page, address);
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__clear_user_page(vto, to);
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kunmap_coherent(vto);
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}
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clear_page(to);
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if ((((address & PAGE_MASK) ^ (unsigned long)to) & CACHE_ALIAS))
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__flush_wback_region(to, PAGE_SIZE);
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}
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/*
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* copy_user_page
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* @to: P1 address
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* @from: P1 address
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* @address: U0 address to be mapped
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* @page: page (virt_to_page(to))
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*/
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void copy_user_page(void *to, void *from, unsigned long address,
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struct page *page)
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void copy_to_user_page(struct vm_area_struct *vma, struct page *page,
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unsigned long vaddr, void *dst, const void *src,
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unsigned long len)
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{
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void *vto;
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__set_bit(PG_mapped, &page->flags);
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if (((address ^ (unsigned long)to) & CACHE_ALIAS) == 0)
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copy_page(to, from);
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else {
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void *vfrom = kmap_coherent(page, address);
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__copy_user_page(vfrom, from, to);
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kunmap_coherent(vfrom);
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}
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vto = kmap_coherent(page, vaddr) + (vaddr & ~PAGE_MASK);
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memcpy(vto, src, len);
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kunmap_coherent(vto);
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if (vma->vm_flags & VM_EXEC)
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flush_cache_page(vma, vaddr, page_to_pfn(page));
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}
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void copy_from_user_page(struct vm_area_struct *vma, struct page *page,
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unsigned long vaddr, void *dst, const void *src,
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unsigned long len)
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{
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void *vfrom;
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__set_bit(PG_mapped, &page->flags);
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vfrom = kmap_coherent(page, vaddr) + (vaddr & ~PAGE_MASK);
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memcpy(dst, vfrom, len);
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kunmap_coherent(vfrom);
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}
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void copy_user_highpage(struct page *to, struct page *from,
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unsigned long vaddr, struct vm_area_struct *vma)
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{
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void *vfrom, *vto;
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__set_bit(PG_mapped, &to->flags);
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vto = kmap_atomic(to, KM_USER1);
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vfrom = kmap_coherent(from, vaddr);
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copy_page(vto, vfrom);
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kunmap_coherent(vfrom);
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if (((vaddr ^ (unsigned long)vto) & CACHE_ALIAS))
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__flush_wback_region(vto, PAGE_SIZE);
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kunmap_atomic(vto, KM_USER1);
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/* Make sure this page is cleared on other CPU's too before using it */
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smp_wmb();
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}
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EXPORT_SYMBOL(copy_user_highpage);
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/*
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* For SH-4, we have our own implementation for ptep_get_and_clear
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*/
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@ -43,21 +43,31 @@ extern void __flush_purge_region(void *start, int size);
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extern void __flush_invalidate_region(void *start, int size);
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#endif
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#define flush_cache_vmap(start, end) flush_cache_all()
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#define flush_cache_vunmap(start, end) flush_cache_all()
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#ifdef CONFIG_CPU_SH4
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extern void copy_to_user_page(struct vm_area_struct *vma,
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struct page *page, unsigned long vaddr, void *dst, const void *src,
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unsigned long len);
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#define copy_to_user_page(vma, page, vaddr, dst, src, len) \
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extern void copy_from_user_page(struct vm_area_struct *vma,
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struct page *page, unsigned long vaddr, void *dst, const void *src,
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unsigned long len);
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#else
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#define copy_to_user_page(vma, page, vaddr, dst, src, len) \
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do { \
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flush_cache_page(vma, vaddr, page_to_pfn(page));\
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memcpy(dst, src, len); \
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flush_icache_user_range(vma, page, vaddr, len); \
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} while (0)
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#define copy_from_user_page(vma, page, vaddr, dst, src, len) \
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#define copy_from_user_page(vma, page, vaddr, dst, src, len) \
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do { \
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flush_cache_page(vma, vaddr, page_to_pfn(page));\
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memcpy(dst, src, len); \
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} while (0)
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#endif
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#define flush_cache_vmap(start, end) flush_cache_all()
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#define flush_cache_vunmap(start, end) flush_cache_all()
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#define HAVE_ARCH_UNMAPPED_AREA
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@ -73,10 +73,13 @@ extern void copy_page_nommu(void *to, void *from);
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#if !defined(CONFIG_CACHE_OFF) && defined(CONFIG_MMU) && \
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(defined(CONFIG_CPU_SH4) || defined(CONFIG_SH7705_CACHE_32KB))
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struct page;
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extern void clear_user_page(void *to, unsigned long address, struct page *pg);
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extern void copy_user_page(void *to, void *from, unsigned long address, struct page *pg);
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extern void __clear_user_page(void *to, void *orig_to);
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extern void __copy_user_page(void *to, void *from, void *orig_to);
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struct vm_area_struct;
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extern void clear_user_page(void *to, unsigned long address, struct page *page);
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#ifdef CONFIG_CPU_SH4
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extern void copy_user_highpage(struct page *to, struct page *from,
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unsigned long vaddr, struct vm_area_struct *vma);
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#define __HAVE_ARCH_COPY_USER_HIGHPAGE
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#endif
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#else
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#define clear_user_page(page, vaddr, pg) clear_page(page)
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#define copy_user_page(to, from, vaddr, pg) copy_page(to, from)
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