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"Das U-Boot" Source Tree
1/* SPDX-License-Identifier: GPL-2.0 */
2/*
3 * Copyright (C) 1996, 99 Ralf Baechle
4 * Copyright (C) 2000, 2002 Maciej W. Rozycki
5 * Copyright (C) 1990, 1999 by Silicon Graphics, Inc.
6 */
7#ifndef _ASM_ADDRSPACE_H
8#define _ASM_ADDRSPACE_H
9
10#include <spaces.h>
11
12/*
13 * Configure language
14 */
15#ifdef __ASSEMBLY__
16#define _ATYPE_
17#define _ATYPE32_
18#define _ATYPE64_
19#define _CONST64_(x) x
20#else
21#define _ATYPE_ __PTRDIFF_TYPE__
22#define _ATYPE32_ int
23#define _ATYPE64_ __s64
24#ifdef CONFIG_64BIT
25#define _CONST64_(x) x ## L
26#else
27#define _CONST64_(x) x ## LL
28#endif
29#endif
30
31/*
32 * 32-bit MIPS address spaces
33 */
34#ifdef __ASSEMBLY__
35#define _ACAST32_
36#define _ACAST64_
37#else
38#define _ACAST32_ (_ATYPE_)(_ATYPE32_) /* widen if necessary */
39#define _ACAST64_ (_ATYPE64_) /* do _not_ narrow */
40#endif
41
42/*
43 * Returns the kernel segment base of a given address
44 */
45#define KSEGX(a) ((_ACAST32_(a)) & _ACAST32_(0xe0000000))
46
47/*
48 * Returns the physical address of a CKSEGx / XKPHYS address
49 */
50#define CPHYSADDR(a) ((_ACAST32_(a)) & 0x1fffffff)
51#define XPHYSADDR(a) ((_ACAST64_(a)) & \
52 _CONST64_(0x0000ffffffffffff))
53
54#ifdef CONFIG_64BIT
55
56/*
57 * Memory segments (64bit kernel mode addresses)
58 * The compatibility segments use the full 64-bit sign extended value. Note
59 * the R8000 doesn't have them so don't reference these in generic MIPS code.
60 */
61#define XKUSEG _CONST64_(0x0000000000000000)
62#define XKSSEG _CONST64_(0x4000000000000000)
63#define XKPHYS _CONST64_(0x8000000000000000)
64#define XKSEG _CONST64_(0xc000000000000000)
65#define CKSEG0 _CONST64_(0xffffffff80000000)
66#define CKSEG1 _CONST64_(0xffffffffa0000000)
67#define CKSSEG _CONST64_(0xffffffffc0000000)
68#define CKSEG3 _CONST64_(0xffffffffe0000000)
69
70#define CKSEG0ADDR(a) (CPHYSADDR(a) | CKSEG0)
71#define CKSEG1ADDR(a) (CPHYSADDR(a) | CKSEG1)
72#define CKSEG2ADDR(a) (CPHYSADDR(a) | CKSEG2)
73#define CKSEG3ADDR(a) (CPHYSADDR(a) | CKSEG3)
74
75#else
76
77#define CKSEG0ADDR(a) (CPHYSADDR(a) | KSEG0)
78#define CKSEG1ADDR(a) (CPHYSADDR(a) | KSEG1)
79#define CKSEG2ADDR(a) (CPHYSADDR(a) | KSEG2)
80#define CKSEG3ADDR(a) (CPHYSADDR(a) | KSEG3)
81
82/*
83 * Map an address to a certain kernel segment
84 */
85#define KSEG0ADDR(a) (CPHYSADDR(a) | KSEG0)
86#define KSEG1ADDR(a) (CPHYSADDR(a) | KSEG1)
87#define KSEG2ADDR(a) (CPHYSADDR(a) | KSEG2)
88#define KSEG3ADDR(a) (CPHYSADDR(a) | KSEG3)
89
90/*
91 * Memory segments (32bit kernel mode addresses)
92 * These are the traditional names used in the 32-bit universe.
93 */
94#define KUSEG 0x00000000
95#define KSEG0 0x80000000
96#define KSEG1 0xa0000000
97#define KSEG2 0xc0000000
98#define KSEG3 0xe0000000
99
100#define CKUSEG 0x00000000
101#define CKSEG0 0x80000000
102#define CKSEG1 0xa0000000
103#define CKSEG2 0xc0000000
104#define CKSEG3 0xe0000000
105
106#endif
107
108/*
109 * Cache modes for XKPHYS address conversion macros
110 */
111#define K_CALG_COH_EXCL1_NOL2 0
112#define K_CALG_COH_SHRL1_NOL2 1
113#define K_CALG_UNCACHED 2
114#define K_CALG_NONCOHERENT 3
115#define K_CALG_COH_EXCL 4
116#define K_CALG_COH_SHAREABLE 5
117#define K_CALG_NOTUSED 6
118#define K_CALG_UNCACHED_ACCEL 7
119
120/*
121 * 64-bit address conversions
122 */
123#define PHYS_TO_XKSEG_UNCACHED(p) PHYS_TO_XKPHYS(K_CALG_UNCACHED, (p))
124#define PHYS_TO_XKSEG_CACHED(p) PHYS_TO_XKPHYS(K_CALG_COH_SHAREABLE, (p))
125#define XKPHYS_TO_PHYS(p) ((p) & TO_PHYS_MASK)
126#define PHYS_TO_XKPHYS(cm, a) (XKPHYS | (_ACAST64_(cm) << 59) | (a))
127
128/*
129 * The ultimate limited of the 64-bit MIPS architecture: 2 bits for selecting
130 * the region, 3 bits for the CCA mode. This leaves 59 bits of which the
131 * R8000 implements most with its 48-bit physical address space.
132 */
133#define TO_PHYS_MASK _CONST64_(0x07ffffffffffffff) /* 2^^59 - 1 */
134
135#define COMPAT_K1BASE32 _CONST64_(0xffffffffa0000000)
136#define PHYS_TO_COMPATK1(x) ((x) | COMPAT_K1BASE32) /* 32-bit compat k1 */
137
138#define KDM_TO_PHYS(x) (_ACAST64_ (x) & TO_PHYS_MASK)
139#define PHYS_TO_K0(x) (_ACAST64_ (x) | CAC_BASE)
140
141#endif /* _ASM_ADDRSPACE_H */