1 /* MN10300 Cache flushing routines 2 * 3 * Copyright (C) 2007 Red Hat, Inc. All Rights Reserved. 4 * Written by David Howells (dhowells@redhat.com) 5 * 6 * This program is free software; you can redistribute it and/or 7 * modify it under the terms of the GNU General Public Licence 8 * as published by the Free Software Foundation; either version 9 * 2 of the Licence, or (at your option) any later version. 10 */ 11 #include <linux/module.h> 12 #include <linux/mm.h> 13 #include <linux/mman.h> 14 #include <linux/threads.h> 15 #include <asm/page.h> 16 #include <asm/pgtable.h> 17 #include <asm/processor.h> 18 #include <asm/cacheflush.h> 19 #include <asm/io.h> 20 #include <asm/uaccess.h> 21 #include <asm/smp.h> 22 #include "cache-smp.h" 23 24 EXPORT_SYMBOL(mn10300_icache_inv); 25 EXPORT_SYMBOL(mn10300_icache_inv_range); 26 EXPORT_SYMBOL(mn10300_icache_inv_range2); 27 EXPORT_SYMBOL(mn10300_icache_inv_page); 28 EXPORT_SYMBOL(mn10300_dcache_inv); 29 EXPORT_SYMBOL(mn10300_dcache_inv_range); 30 EXPORT_SYMBOL(mn10300_dcache_inv_range2); 31 EXPORT_SYMBOL(mn10300_dcache_inv_page); 32 33 #ifdef CONFIG_MN10300_CACHE_WBACK 34 EXPORT_SYMBOL(mn10300_dcache_flush); 35 EXPORT_SYMBOL(mn10300_dcache_flush_inv); 36 EXPORT_SYMBOL(mn10300_dcache_flush_inv_range); 37 EXPORT_SYMBOL(mn10300_dcache_flush_inv_range2); 38 EXPORT_SYMBOL(mn10300_dcache_flush_inv_page); 39 EXPORT_SYMBOL(mn10300_dcache_flush_range); 40 EXPORT_SYMBOL(mn10300_dcache_flush_range2); 41 EXPORT_SYMBOL(mn10300_dcache_flush_page); 42 #endif 43 44 /* 45 * allow userspace to flush the instruction cache 46 */ sys_cacheflush(unsigned long start,unsigned long end)47asmlinkage long sys_cacheflush(unsigned long start, unsigned long end) 48 { 49 if (end < start) 50 return -EINVAL; 51 52 flush_icache_range(start, end); 53 return 0; 54 } 55