| /* 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_KMALLOC_MINALIGN 8 |
| #define ARCH_SLAB_MINALIGN 8 |
| |
| /*****************************************************************************/ |
| /* |
| * 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 */ |