Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S932748AbZD3PpY (ORCPT ); Thu, 30 Apr 2009 11:45:24 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S932192AbZD3PmR (ORCPT ); Thu, 30 Apr 2009 11:42:17 -0400 Received: from moutng.kundenserver.de ([212.227.126.188]:56398 "EHLO moutng.kundenserver.de" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S932347AbZD3PmB (ORCPT ); Thu, 30 Apr 2009 11:42:01 -0400 Message-Id: <2d8ccc76119d2379859480dbb8f7562743a1de58.1241105648.git.arnd@arndb.de> In-Reply-To: References: From: Arnd Bergmann Date: Thu, 6 Nov 2008 14:40:51 +0100 Subject: [PATCH 07/27] asm-generic: add minimal cache description Cc: linux-arch@vger.kernel.org, Michal Simek , Remis Lima Baima , linux-kernel@vger.kernel.org X-Provags-ID: V01U2FsdGVkX1+tc5exIHLPTAfl05pdrfzjsn8CCu1C3f3n6yX tzZWd17R0ynqILCYJETXFfcVWy+YUhgkviHXWjE3Mi3ZD3oeCt +uIChY90bPBh6twn189Zw== To: unlisted-recipients:; (no To-header on input) Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 2724 Lines: 76 Many architectures have a 32 byte cache line and never require flushing the cache, so they can use these generic implementation. Signed-off-by: Arnd Bergmann Signed-off-by: Remis Lima Baima --- include/asm-generic/cache.h | 12 ++++++++++++ include/asm-generic/cacheflush.h | 30 ++++++++++++++++++++++++++++++ 2 files changed, 42 insertions(+), 0 deletions(-) create mode 100644 include/asm-generic/cache.h create mode 100644 include/asm-generic/cacheflush.h diff --git a/include/asm-generic/cache.h b/include/asm-generic/cache.h new file mode 100644 index 0000000..1bfcfe5 --- /dev/null +++ b/include/asm-generic/cache.h @@ -0,0 +1,12 @@ +#ifndef __ASM_GENERIC_CACHE_H +#define __ASM_GENERIC_CACHE_H +/* + * 32 bytes appears to be the most common cache line size, + * so make that the default here. Architectures with larger + * cache lines need to provide their own cache.h. + */ + +#define L1_CACHE_SHIFT 5 +#define L1_CACHE_BYTES (1 << L1_CACHE_SHIFT) + +#endif /* __ASM_GENERIC_CACHE_H */ diff --git a/include/asm-generic/cacheflush.h b/include/asm-generic/cacheflush.h new file mode 100644 index 0000000..ba4ec39 --- /dev/null +++ b/include/asm-generic/cacheflush.h @@ -0,0 +1,30 @@ +#ifndef __ASM_CACHEFLUSH_H +#define __ASM_CACHEFLUSH_H + +/* Keep includes the same across arches. */ +#include + +/* + * The cache doesn't need to be flushed when TLB entries change when + * the cache is mapped to physical memory, not virtual memory + */ +#define flush_cache_all() do { } while (0) +#define flush_cache_mm(mm) do { } while (0) +#define flush_cache_dup_mm(mm) do { } while (0) +#define flush_cache_range(vma, start, end) do { } while (0) +#define flush_cache_page(vma, vmaddr, pfn) do { } while (0) +#define flush_dcache_page(page) do { } while (0) +#define flush_dcache_mmap_lock(mapping) do { } while (0) +#define flush_dcache_mmap_unlock(mapping) do { } while (0) +#define flush_icache_range(start, end) do { } while (0) +#define flush_icache_page(vma,pg) do { } while (0) +#define flush_icache_user_range(vma,pg,adr,len) do { } while (0) +#define flush_cache_vmap(start, end) do { } while (0) +#define flush_cache_vunmap(start, end) do { } while (0) + +#define copy_to_user_page(vma, page, vaddr, dst, src, len) \ + memcpy(dst, src, len) +#define copy_from_user_page(vma, page, vaddr, dst, src, len) \ + memcpy(dst, src, len) + +#endif /* __ASM_CACHEFLUSH_H */ -- 1.5.6.3 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/