| /* 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 <linux/module.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_primary(page); |
| |
| frv_dcache_writeback((unsigned long) vaddr, (unsigned long) vaddr + PAGE_SIZE); |
| |
| kunmap_atomic_primary(vaddr); |
| |
| if (dampr2) { |
| __set_DAMPR(2, dampr2); |
| __set_IAMPR(2, dampr2); |
| } |
| |
| } /* end flush_dcache_page() */ |
| |
| EXPORT_SYMBOL(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_primary(page); |
| |
| start = (start & ~PAGE_MASK) | (unsigned long) vaddr; |
| frv_cache_wback_inv(start, start + len); |
| |
| kunmap_atomic_primary(vaddr); |
| |
| if (dampr2) { |
| __set_DAMPR(2, dampr2); |
| __set_IAMPR(2, dampr2); |
| } |
| |
| } /* end flush_icache_user_range() */ |
| |
| EXPORT_SYMBOL(flush_icache_user_range); |