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author | Rusty Russell <rusty@rustcorp.com.au> | 2008-12-31 12:35:57 (GMT) |
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committer | Rusty Russell <rusty@rustcorp.com.au> | 2008-12-31 12:35:57 (GMT) |
commit | 2ca1a615835d9f4990f42102ab1f2ef434e7e89c (patch) | |
tree | 726cf3d5f29a6c66c44e4bd68e7ebed2fd83d059 /arch/arm/mm/copypage-xscale.c | |
parent | e12f0102ac81d660c9f801d0a0e10ccf4537a9de (diff) | |
parent | 6a94cb73064c952255336cc57731904174b2c58f (diff) | |
download | linux-fsl-qoriq-2ca1a615835d9f4990f42102ab1f2ef434e7e89c.tar.xz |
Merge branch 'master' of git://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux-2.6
Conflicts:
arch/x86/kernel/io_apic.c
Diffstat (limited to 'arch/arm/mm/copypage-xscale.c')
-rw-r--r-- | arch/arm/mm/copypage-xscale.c | 47 |
1 files changed, 26 insertions, 21 deletions
diff --git a/arch/arm/mm/copypage-xscale.c b/arch/arm/mm/copypage-xscale.c index bad4933..d18f239 100644 --- a/arch/arm/mm/copypage-xscale.c +++ b/arch/arm/mm/copypage-xscale.c @@ -15,8 +15,8 @@ */ #include <linux/init.h> #include <linux/mm.h> +#include <linux/highmem.h> -#include <asm/page.h> #include <asm/pgtable.h> #include <asm/tlbflush.h> #include <asm/cacheflush.h> @@ -35,7 +35,7 @@ static DEFINE_SPINLOCK(minicache_lock); /* - * XScale mini-dcache optimised copy_user_page + * XScale mini-dcache optimised copy_user_highpage * * We flush the destination cache lines just before we write the data into the * corresponding address. Since the Dcache is read-allocate, this removes the @@ -90,48 +90,53 @@ mc_copy_user_page(void *from, void *to) : "r" (from), "r" (to), "I" (PAGE_SIZE / 64 - 1)); } -void xscale_mc_copy_user_page(void *kto, const void *kfrom, unsigned long vaddr) +void xscale_mc_copy_user_highpage(struct page *to, struct page *from, + unsigned long vaddr) { - struct page *page = virt_to_page(kfrom); + void *kto = kmap_atomic(to, KM_USER1); - if (test_and_clear_bit(PG_dcache_dirty, &page->flags)) - __flush_dcache_page(page_mapping(page), page); + if (test_and_clear_bit(PG_dcache_dirty, &from->flags)) + __flush_dcache_page(page_mapping(from), from); spin_lock(&minicache_lock); - set_pte_ext(TOP_PTE(COPYPAGE_MINICACHE), pfn_pte(__pa(kfrom) >> PAGE_SHIFT, minicache_pgprot), 0); + set_pte_ext(TOP_PTE(COPYPAGE_MINICACHE), pfn_pte(page_to_pfn(from), minicache_pgprot), 0); flush_tlb_kernel_page(COPYPAGE_MINICACHE); mc_copy_user_page((void *)COPYPAGE_MINICACHE, kto); spin_unlock(&minicache_lock); + + kunmap_atomic(kto, KM_USER1); } /* * XScale optimised clear_user_page */ -void __attribute__((naked)) -xscale_mc_clear_user_page(void *kaddr, unsigned long vaddr) +void +xscale_mc_clear_user_highpage(struct page *page, unsigned long vaddr) { + void *ptr, *kaddr = kmap_atomic(page, KM_USER0); asm volatile( - "mov r1, %0 \n\ + "mov r1, %2 \n\ mov r2, #0 \n\ mov r3, #0 \n\ -1: mov ip, r0 \n\ - strd r2, [r0], #8 \n\ - strd r2, [r0], #8 \n\ - strd r2, [r0], #8 \n\ - strd r2, [r0], #8 \n\ +1: mov ip, %0 \n\ + strd r2, [%0], #8 \n\ + strd r2, [%0], #8 \n\ + strd r2, [%0], #8 \n\ + strd r2, [%0], #8 \n\ mcr p15, 0, ip, c7, c10, 1 @ clean D line\n\ subs r1, r1, #1 \n\ mcr p15, 0, ip, c7, c6, 1 @ invalidate D line\n\ - bne 1b \n\ - mov pc, lr" - : - : "I" (PAGE_SIZE / 32)); + bne 1b" + : "=r" (ptr) + : "0" (kaddr), "I" (PAGE_SIZE / 32) + : "r1", "r2", "r3", "ip"); + kunmap_atomic(kaddr, KM_USER0); } struct cpu_user_fns xscale_mc_user_fns __initdata = { - .cpu_clear_user_page = xscale_mc_clear_user_page, - .cpu_copy_user_page = xscale_mc_copy_user_page, + .cpu_clear_user_highpage = xscale_mc_clear_user_highpage, + .cpu_copy_user_highpage = xscale_mc_copy_user_highpage, }; |