aboutsummaryrefslogtreecommitdiffstats
path: root/arch/arm/mm/copypage-xscale.c
diff options
context:
space:
mode:
Diffstat (limited to 'arch/arm/mm/copypage-xscale.c')
-rw-r--r--arch/arm/mm/copypage-xscale.c19
1 files changed, 11 insertions, 8 deletions
diff --git a/arch/arm/mm/copypage-xscale.c b/arch/arm/mm/copypage-xscale.c
index bad49331bbf9..01bafafce181 100644
--- a/arch/arm/mm/copypage-xscale.c
+++ b/arch/arm/mm/copypage-xscale.c
@@ -15,8 +15,8 @@
15 */ 15 */
16#include <linux/init.h> 16#include <linux/init.h>
17#include <linux/mm.h> 17#include <linux/mm.h>
18#include <linux/highmem.h>
18 19
19#include <asm/page.h>
20#include <asm/pgtable.h> 20#include <asm/pgtable.h>
21#include <asm/tlbflush.h> 21#include <asm/tlbflush.h>
22#include <asm/cacheflush.h> 22#include <asm/cacheflush.h>
@@ -35,7 +35,7 @@
35static DEFINE_SPINLOCK(minicache_lock); 35static DEFINE_SPINLOCK(minicache_lock);
36 36
37/* 37/*
38 * XScale mini-dcache optimised copy_user_page 38 * XScale mini-dcache optimised copy_user_highpage
39 * 39 *
40 * We flush the destination cache lines just before we write the data into the 40 * We flush the destination cache lines just before we write the data into the
41 * corresponding address. Since the Dcache is read-allocate, this removes the 41 * corresponding address. Since the Dcache is read-allocate, this removes the
@@ -90,21 +90,24 @@ mc_copy_user_page(void *from, void *to)
90 : "r" (from), "r" (to), "I" (PAGE_SIZE / 64 - 1)); 90 : "r" (from), "r" (to), "I" (PAGE_SIZE / 64 - 1));
91} 91}
92 92
93void xscale_mc_copy_user_page(void *kto, const void *kfrom, unsigned long vaddr) 93void xscale_mc_copy_user_highpage(struct page *to, struct page *from,
94 unsigned long vaddr)
94{ 95{
95 struct page *page = virt_to_page(kfrom); 96 void *kto = kmap_atomic(to, KM_USER1);
96 97
97 if (test_and_clear_bit(PG_dcache_dirty, &page->flags)) 98 if (test_and_clear_bit(PG_dcache_dirty, &from->flags))
98 __flush_dcache_page(page_mapping(page), page); 99 __flush_dcache_page(page_mapping(from), from);
99 100
100 spin_lock(&minicache_lock); 101 spin_lock(&minicache_lock);
101 102
102 set_pte_ext(TOP_PTE(COPYPAGE_MINICACHE), pfn_pte(__pa(kfrom) >> PAGE_SHIFT, minicache_pgprot), 0); 103 set_pte_ext(TOP_PTE(COPYPAGE_MINICACHE), pfn_pte(page_to_pfn(from), minicache_pgprot), 0);
103 flush_tlb_kernel_page(COPYPAGE_MINICACHE); 104 flush_tlb_kernel_page(COPYPAGE_MINICACHE);
104 105
105 mc_copy_user_page((void *)COPYPAGE_MINICACHE, kto); 106 mc_copy_user_page((void *)COPYPAGE_MINICACHE, kto);
106 107
107 spin_unlock(&minicache_lock); 108 spin_unlock(&minicache_lock);
109
110 kunmap_atomic(kto, KM_USER1);
108} 111}
109 112
110/* 113/*
@@ -133,5 +136,5 @@ xscale_mc_clear_user_page(void *kaddr, unsigned long vaddr)
133 136
134struct cpu_user_fns xscale_mc_user_fns __initdata = { 137struct cpu_user_fns xscale_mc_user_fns __initdata = {
135 .cpu_clear_user_page = xscale_mc_clear_user_page, 138 .cpu_clear_user_page = xscale_mc_clear_user_page,
136 .cpu_copy_user_page = xscale_mc_copy_user_page, 139 .cpu_copy_user_highpage = xscale_mc_copy_user_highpage,
137}; 140};