11da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/* cache-page.c: whole-page cache wrangling functions for MMU linux 21da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 31da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * Copyright (C) 2004 Red Hat, Inc. All Rights Reserved. 41da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * Written by David Howells (dhowells@redhat.com) 51da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 61da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * This program is free software; you can redistribute it and/or 71da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * modify it under the terms of the GNU General Public License 81da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * as published by the Free Software Foundation; either version 91da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 2 of the License, or (at your option) any later version. 101da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 111da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#include <linux/sched.h> 121da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#include <linux/mm.h> 131da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#include <linux/highmem.h> 14402344012ebe696d9353bbf056889ddaaec83079David Howells#include <linux/module.h> 151da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#include <asm/pgalloc.h> 161da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 171da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/*****************************************************************************/ 181da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/* 191da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * DCF takes a virtual address and the page may not currently have one 201da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * - temporarily hijack a kmap_atomic() slot and attach the page to it 211da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 221da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsvoid flush_dcache_page(struct page *page) 231da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 241da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds unsigned long dampr2; 251da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds void *vaddr; 261da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 271da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds dampr2 = __get_DAMPR(2); 281da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 293e4d3af501cccdc8a8cca41bdbe57d54ad7e7e73Peter Zijlstra vaddr = kmap_atomic_primary(page, __KM_CACHE); 301da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 311da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds frv_dcache_writeback((unsigned long) vaddr, (unsigned long) vaddr + PAGE_SIZE); 321da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 333e4d3af501cccdc8a8cca41bdbe57d54ad7e7e73Peter Zijlstra kunmap_atomic_primary(vaddr, __KM_CACHE); 341da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 351da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (dampr2) { 361da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds __set_DAMPR(2, dampr2); 371da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds __set_IAMPR(2, dampr2); 381da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 391da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 401da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} /* end flush_dcache_page() */ 411da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 42402344012ebe696d9353bbf056889ddaaec83079David HowellsEXPORT_SYMBOL(flush_dcache_page); 43402344012ebe696d9353bbf056889ddaaec83079David Howells 441da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/*****************************************************************************/ 451da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/* 461da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * ICI takes a virtual address and the page may not currently have one 471da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * - so we temporarily attach the page to a bit of virtual space so that is can be flushed 481da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 491da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsvoid flush_icache_user_range(struct vm_area_struct *vma, struct page *page, 501da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds unsigned long start, unsigned long len) 511da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 521da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds unsigned long dampr2; 531da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds void *vaddr; 541da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 551da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds dampr2 = __get_DAMPR(2); 561da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 573e4d3af501cccdc8a8cca41bdbe57d54ad7e7e73Peter Zijlstra vaddr = kmap_atomic_primary(page, __KM_CACHE); 581da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 591da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds start = (start & ~PAGE_MASK) | (unsigned long) vaddr; 601da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds frv_cache_wback_inv(start, start + len); 611da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 623e4d3af501cccdc8a8cca41bdbe57d54ad7e7e73Peter Zijlstra kunmap_atomic_primary(vaddr, __KM_CACHE); 631da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 641da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (dampr2) { 651da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds __set_DAMPR(2, dampr2); 661da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds __set_IAMPR(2, dampr2); 671da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 681da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 691da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} /* end flush_icache_user_range() */ 70402344012ebe696d9353bbf056889ddaaec83079David Howells 71402344012ebe696d9353bbf056889ddaaec83079David HowellsEXPORT_SYMBOL(flush_icache_user_range); 72