tjh.dev
Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel
os
linux
1/*
2 * This file is subject to the terms and conditions of the GNU General Public
3 * License. See the file "COPYING" in the main directory of this archive
4 * for more details.
5 *
6 * Copyright (C) 1994 - 1999, 2000, 03, 04 Ralf Baechle
7 * Copyright (C) 2000, 2002 Maciej W. Rozycki
8 * Copyright (C) 1990, 1999, 2000 Silicon Graphics, Inc.
9 */
10#ifndef _ASM_MACH_GENERIC_SPACES_H
11#define _ASM_MACH_GENERIC_SPACES_H
12
13
14#ifdef CONFIG_32BIT
15
16#define CAC_BASE 0x80000000
17#define IO_BASE 0xa0000000
18#define UNCAC_BASE 0xa0000000
19#define MAP_BASE 0xc0000000
20
21/*
22 * This handles the memory map.
23 * We handle pages at KSEG0 for kernels with 32 bit address space.
24 */
25#define PAGE_OFFSET 0x80000000UL
26
27/*
28 * Memory above this physical address will be considered highmem.
29 */
30#ifndef HIGHMEM_START
31#define HIGHMEM_START 0x20000000UL
32#endif
33
34#endif /* CONFIG_32BIT */
35
36#ifdef CONFIG_64BIT
37
38/*
39 * This handles the memory map.
40 */
41#ifdef CONFIG_DMA_NONCOHERENT
42#define PAGE_OFFSET 0x9800000000000000UL
43#else
44#define PAGE_OFFSET 0xa800000000000000UL
45#endif
46
47/*
48 * Memory above this physical address will be considered highmem.
49 * Fixme: 59 bits is a fictive number and makes assumptions about processors
50 * in the distant future. Nobody will care for a few years :-)
51 */
52#ifndef HIGHMEM_START
53#define HIGHMEM_START (1UL << 59UL)
54#endif
55
56#ifdef CONFIG_DMA_NONCOHERENT
57#define CAC_BASE 0x9800000000000000UL
58#else
59#define CAC_BASE 0xa800000000000000UL
60#endif
61#define IO_BASE 0x9000000000000000UL
62#define UNCAC_BASE 0x9000000000000000UL
63#define MAP_BASE 0xc000000000000000UL
64
65#define TO_PHYS(x) ( ((x) & TO_PHYS_MASK))
66#define TO_CAC(x) (CAC_BASE | ((x) & TO_PHYS_MASK))
67#define TO_UNCAC(x) (UNCAC_BASE | ((x) & TO_PHYS_MASK))
68
69#endif /* CONFIG_64BIT */
70
71#endif /* __ASM_MACH_GENERIC_SPACES_H */