a6eb9fe105
Now each architecture has the own dma_get_cache_alignment implementation. dma_get_cache_alignment returns the minimum DMA alignment. Architectures define it as ARCH_KMALLOC_MINALIGN (it's used to make sure that malloc'ed buffer is DMA-safe; the buffer doesn't share a cache with the others). So we can unify dma_get_cache_alignment implementations. This patch: dma_get_cache_alignment() needs to know if an architecture defines ARCH_KMALLOC_MINALIGN or not (needs to know if architecture has DMA alignment restriction). However, slab.h define ARCH_KMALLOC_MINALIGN if architectures doesn't define it. Let's rename ARCH_KMALLOC_MINALIGN to ARCH_DMA_MINALIGN. ARCH_KMALLOC_MINALIGN is used only in the internals of slab/slob/slub (except for crypto). Signed-off-by: FUJITA Tomonori <fujita.tomonori@lab.ntt.co.jp> Cc: <linux-arch@vger.kernel.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
87 lines
2.2 KiB
C
87 lines
2.2 KiB
C
/* mem-layout.h: memory layout
|
|
*
|
|
* 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.
|
|
*/
|
|
|
|
#ifndef _ASM_MEM_LAYOUT_H
|
|
#define _ASM_MEM_LAYOUT_H
|
|
|
|
#ifndef __ASSEMBLY__
|
|
#define __UL(X) ((unsigned long) (X))
|
|
#else
|
|
#define __UL(X) (X)
|
|
#endif
|
|
|
|
/*
|
|
* PAGE_SHIFT determines the page size
|
|
*/
|
|
#define PAGE_SHIFT 14
|
|
|
|
#ifndef __ASSEMBLY__
|
|
#define PAGE_SIZE (1UL << PAGE_SHIFT)
|
|
#else
|
|
#define PAGE_SIZE (1 << PAGE_SHIFT)
|
|
#endif
|
|
|
|
#define PAGE_MASK (~(PAGE_SIZE-1))
|
|
|
|
/*
|
|
* the slab must be aligned such that load- and store-double instructions don't
|
|
* fault if used
|
|
*/
|
|
#define ARCH_DMA_MINALIGN L1_CACHE_BYTES
|
|
#define ARCH_SLAB_MINALIGN L1_CACHE_BYTES
|
|
|
|
/*****************************************************************************/
|
|
/*
|
|
* virtual memory layout from kernel's point of view
|
|
*/
|
|
#define PAGE_OFFSET ((unsigned long) &__page_offset)
|
|
|
|
#ifdef CONFIG_MMU
|
|
|
|
/* see Documentation/frv/mmu-layout.txt */
|
|
#define KERNEL_LOWMEM_START __UL(0xc0000000)
|
|
#define KERNEL_LOWMEM_END __UL(0xd0000000)
|
|
#define VMALLOC_START __UL(0xd0000000)
|
|
#define VMALLOC_END __UL(0xd8000000)
|
|
#define PKMAP_BASE __UL(0xd8000000)
|
|
#define PKMAP_END __UL(0xdc000000)
|
|
#define KMAP_ATOMIC_SECONDARY_FRAME __UL(0xdc000000)
|
|
#define KMAP_ATOMIC_PRIMARY_FRAME __UL(0xdd000000)
|
|
|
|
#endif
|
|
|
|
#define KERNEL_IO_START __UL(0xe0000000)
|
|
|
|
|
|
/*****************************************************************************/
|
|
/*
|
|
* memory layout from userspace's point of view
|
|
*/
|
|
#define BRK_BASE __UL(2 * 1024 * 1024 + PAGE_SIZE)
|
|
#define STACK_TOP __UL(2 * 1024 * 1024)
|
|
#define STACK_TOP_MAX __UL(0xc0000000)
|
|
|
|
/* userspace process size */
|
|
#ifdef CONFIG_MMU
|
|
#define TASK_SIZE (PAGE_OFFSET)
|
|
#else
|
|
#define TASK_SIZE __UL(0xFFFFFFFFUL)
|
|
#endif
|
|
|
|
/* base of area at which unspecified mmaps will start */
|
|
#ifdef CONFIG_BINFMT_ELF_FDPIC
|
|
#define TASK_UNMAPPED_BASE __UL(16 * 1024 * 1024)
|
|
#else
|
|
#define TASK_UNMAPPED_BASE __UL(TASK_SIZE / 3)
|
|
#endif
|
|
|
|
#endif /* _ASM_MEM_LAYOUT_H */
|