Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S933348AbZD3Pxz (ORCPT ); Thu, 30 Apr 2009 11:53:55 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S932465AbZD3PnF (ORCPT ); Thu, 30 Apr 2009 11:43:05 -0400 Received: from moutng.kundenserver.de ([212.227.126.187]:52632 "EHLO moutng.kundenserver.de" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S932367AbZD3PmD (ORCPT ); Thu, 30 Apr 2009 11:42:03 -0400 Message-Id: <821a570574a4dadc0c0c838f90f41dd5df81f090.1241105648.git.arnd@arndb.de> In-Reply-To: References: From: Arnd Bergmann Date: Wed, 29 Apr 2009 16:55:36 +0200 Subject: [PATCH 11/27] asm-generic: add generic page.h Cc: linux-arch@vger.kernel.org, Michal Simek , Remis Lima Baima , linux-kernel@vger.kernel.org X-Provags-ID: V01U2FsdGVkX18vDlqze/Vw7hb/y9hRfzXRXm4BPXlB40dCryj kvKEcVmrUDS4eR9UOZ4cSAxOzGGXWGwLJERHdw87NPxw21KIup YAnXid3eshfTYdetHtNiw== 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: 3466 Lines: 126 Architectures that have no mmu should not have to describe their page tables. This adds a new page.h file based on the existing nommu architectures that adds a lot of dummy definitions to let you correctly compile a nommu kernel. Signed-off-by: Arnd Bergmann --- include/asm-generic/page.h | 99 ++++++++++++++++++++++++++++++++++++++++++++ 1 files changed, 99 insertions(+), 0 deletions(-) create mode 100644 include/asm-generic/page.h diff --git a/include/asm-generic/page.h b/include/asm-generic/page.h new file mode 100644 index 0000000..75fec18 --- /dev/null +++ b/include/asm-generic/page.h @@ -0,0 +1,99 @@ +#ifndef __ASM_GENERIC_PAGE_H +#define __ASM_GENERIC_PAGE_H +/* + * Generic page.h implementation, for NOMMU architectures. + * This provides the dummy definitions for the memory management. + */ + +#ifdef CONFIG_MMU +#error need to prove a real asm/page.h +#endif + + +/* PAGE_SHIFT determines the page size */ + +#define PAGE_SHIFT 12 +#ifdef __ASSEMBLY__ +#define PAGE_SIZE (1 << PAGE_SHIFT) +#else +#define PAGE_SIZE (1UL << PAGE_SHIFT) +#endif +#define PAGE_MASK (~(PAGE_SIZE-1)) + +#include + +#ifndef __ASSEMBLY__ + +#define get_user_page(vaddr) __get_free_page(GFP_KERNEL) +#define free_user_page(page, addr) free_page(addr) + +#define clear_page(page) memset((page), 0, PAGE_SIZE) +#define copy_page(to,from) memcpy((to), (from), PAGE_SIZE) + +#define clear_user_page(page, vaddr, pg) clear_page(page) +#define copy_user_page(to, from, vaddr, pg) copy_page(to, from) + +/* + * These are used to make use of C type-checking.. + */ +typedef struct { + unsigned long pte; +} pte_t; +typedef struct { + unsigned long pmd[16]; +} pmd_t; +typedef struct { + unsigned long pgd; +} pgd_t; +typedef struct { + unsigned long pgprot; +} pgprot_t; +typedef struct page *pgtable_t; + +#define pte_val(x) ((x).pte) +#define pmd_val(x) ((&x)->pmd[0]) +#define pgd_val(x) ((x).pgd) +#define pgprot_val(x) ((x).pgprot) + +#define __pte(x) ((pte_t) { (x) } ) +#define __pmd(x) ((pmd_t) { (x) } ) +#define __pgd(x) ((pgd_t) { (x) } ) +#define __pgprot(x) ((pgprot_t) { (x) } ) + +extern unsigned long memory_start; +extern unsigned long memory_end; + +#endif /* !__ASSEMBLY__ */ + +#ifdef CONFIG_KERNEL_RAM_BASE_ADDRESS +#define PAGE_OFFSET (CONFIG_KERNEL_RAM_BASE_ADDRESS) +#else +#define PAGE_OFFSET (0) +#endif + +#ifndef __ASSEMBLY__ + +#define __va(x) ((void *)((unsigned long)(x) + PAGE_OFFSET)) +#define __pa(x) ((unsigned long) (x) - PAGE_OFFSET) + +#define virt_to_pfn(kaddr) (__pa(kaddr) >> PAGE_SHIFT) +#define pfn_to_virt(pfn) __va((pfn) << PAGE_SHIFT) + +#define virt_to_page(addr) (mem_map + (((unsigned long)(addr)-PAGE_OFFSET) >> PAGE_SHIFT)) +#define page_to_virt(page) ((((page) - mem_map) << PAGE_SHIFT) + PAGE_OFFSET) + +#ifndef page_to_phys +#define page_to_phys(page) ((dma_addr_t)page_to_pfn(page) << PAGE_SHIFT) +#endif + +#define pfn_valid(pfn) ((pfn) < max_mapnr) + +#define virt_addr_valid(kaddr) (((void *)(kaddr) >= (void *)PAGE_OFFSET) && \ + ((void *)(kaddr) < (void *)memory_end)) + +#endif /* __ASSEMBLY__ */ + +#include +#include + +#endif /* __ASM_GENERIC_PAGE_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/