diff options
Diffstat (limited to 'arch/frv/mm/cache-page.c')
| -rw-r--r-- | arch/frv/mm/cache-page.c | 66 |
1 files changed, 66 insertions, 0 deletions
diff --git a/arch/frv/mm/cache-page.c b/arch/frv/mm/cache-page.c new file mode 100644 index 000000000000..683b5e344318 --- /dev/null +++ b/arch/frv/mm/cache-page.c @@ -0,0 +1,66 @@ +/* cache-page.c: whole-page cache wrangling functions for MMU linux + * + * Copyright (C) 2004 Red Hat, Inc. All Rights Reserved. + * Written by David Howells (dhowells@redhat.com) + * + * This program is free software; you can redistribute it and/or + * modify it under the terms of the GNU General Public License + * as published by the Free Software Foundation; either version + * 2 of the License, or (at your option) any later version. + */ +#include <linux/sched.h> +#include <linux/mm.h> +#include <linux/highmem.h> +#include <asm/pgalloc.h> + +/*****************************************************************************/ +/* + * DCF takes a virtual address and the page may not currently have one + * - temporarily hijack a kmap_atomic() slot and attach the page to it + */ +void flush_dcache_page(struct page *page) +{ + unsigned long dampr2; + void *vaddr; + + dampr2 = __get_DAMPR(2); + + vaddr = kmap_atomic(page, __KM_CACHE); + + frv_dcache_writeback((unsigned long) vaddr, (unsigned long) vaddr + PAGE_SIZE); + + kunmap_atomic(vaddr, __KM_CACHE); + + if (dampr2) { + __set_DAMPR(2, dampr2); + __set_IAMPR(2, dampr2); + } + +} /* end flush_dcache_page() */ + +/*****************************************************************************/ +/* + * ICI takes a virtual address and the page may not currently have one + * - so we temporarily attach the page to a bit of virtual space so that is can be flushed + */ +void flush_icache_user_range(struct vm_area_struct *vma, struct page *page, + unsigned long start, unsigned long len) +{ + unsigned long dampr2; + void *vaddr; + + dampr2 = __get_DAMPR(2); + + vaddr = kmap_atomic(page, __KM_CACHE); + + start = (start & ~PAGE_MASK) | (unsigned long) vaddr; + frv_cache_wback_inv(start, start + len); + + kunmap_atomic(vaddr, __KM_CACHE); + + if (dampr2) { + __set_DAMPR(2, dampr2); + __set_IAMPR(2, dampr2); + } + +} /* end flush_icache_user_range() */ |
