tjh.dev
Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel
os
linux
1/*
2 * arch/xtensa/include/asm/xchal_vaddr_remap.h
3 *
4 * Xtensa macros for MMU V3 Support. Deals with re-mapping the Virtual
5 * Memory Addresses from "Virtual == Physical" to their prevvious V2 MMU
6 * mappings (KSEG at 0xD0000000 and KIO at 0XF0000000).
7 *
8 * This file is subject to the terms and conditions of the GNU General Public
9 * License. See the file "COPYING" in the main directory of this archive
10 * for more details.
11 *
12 * Copyright (C) 2008 - 2012 Tensilica Inc.
13 *
14 * Pete Delaney <piet@tensilica.com>
15 * Marc Gauthier <marc@tensilica.com
16 */
17
18#ifndef _XTENSA_VECTORS_H
19#define _XTENSA_VECTORS_H
20
21#include <variant/core.h>
22#include <platform/hardware.h>
23
24#if XCHAL_HAVE_PTP_MMU
25#define XCHAL_KIO_CACHED_VADDR 0xe0000000
26#define XCHAL_KIO_BYPASS_VADDR 0xf0000000
27#define XCHAL_KIO_DEFAULT_PADDR 0xf0000000
28#else
29#define XCHAL_KIO_BYPASS_VADDR XCHAL_KIO_PADDR
30#define XCHAL_KIO_DEFAULT_PADDR 0x90000000
31#endif
32#define XCHAL_KIO_SIZE 0x10000000
33
34#if (!XCHAL_HAVE_PTP_MMU || XCHAL_HAVE_SPANNING_WAY) && defined(CONFIG_OF)
35#define XCHAL_KIO_PADDR xtensa_get_kio_paddr()
36#ifndef __ASSEMBLY__
37extern unsigned long xtensa_kio_paddr;
38
39static inline unsigned long xtensa_get_kio_paddr(void)
40{
41 return xtensa_kio_paddr;
42}
43#endif
44#else
45#define XCHAL_KIO_PADDR XCHAL_KIO_DEFAULT_PADDR
46#endif
47
48#if defined(CONFIG_MMU)
49
50/* Will Become VECBASE */
51#define VIRTUAL_MEMORY_ADDRESS 0xD0000000
52
53/* Image Virtual Start Address */
54#define KERNELOFFSET 0xD0003000
55
56#if defined(XCHAL_HAVE_PTP_MMU) && XCHAL_HAVE_PTP_MMU && XCHAL_HAVE_SPANNING_WAY
57 /* MMU v3 - XCHAL_HAVE_PTP_MMU == 1 */
58 #define LOAD_MEMORY_ADDRESS 0x00003000
59#else
60 /* MMU V2 - XCHAL_HAVE_PTP_MMU == 0 */
61 #define LOAD_MEMORY_ADDRESS 0xD0003000
62#endif
63
64#define RESET_VECTOR1_VADDR (VIRTUAL_MEMORY_ADDRESS + \
65 XCHAL_RESET_VECTOR1_PADDR)
66
67#else /* !defined(CONFIG_MMU) */
68 /* MMU Not being used - Virtual == Physical */
69
70 /* VECBASE */
71 #define VIRTUAL_MEMORY_ADDRESS (PLATFORM_DEFAULT_MEM_START + 0x2000)
72
73 /* Location of the start of the kernel text, _start */
74 #define KERNELOFFSET (PLATFORM_DEFAULT_MEM_START + 0x3000)
75
76 /* Loaded just above possibly live vectors */
77 #define LOAD_MEMORY_ADDRESS (PLATFORM_DEFAULT_MEM_START + 0x3000)
78
79#define RESET_VECTOR1_VADDR (XCHAL_RESET_VECTOR1_VADDR)
80
81#endif /* CONFIG_MMU */
82
83#define XC_VADDR(offset) (VIRTUAL_MEMORY_ADDRESS + offset)
84
85/* Used to set VECBASE register */
86#define VECBASE_RESET_VADDR VIRTUAL_MEMORY_ADDRESS
87
88#if defined(XCHAL_HAVE_VECBASE) && XCHAL_HAVE_VECBASE
89
90#define USER_VECTOR_VADDR XC_VADDR(XCHAL_USER_VECOFS)
91#define KERNEL_VECTOR_VADDR XC_VADDR(XCHAL_KERNEL_VECOFS)
92#define DOUBLEEXC_VECTOR_VADDR XC_VADDR(XCHAL_DOUBLEEXC_VECOFS)
93#define WINDOW_VECTORS_VADDR XC_VADDR(XCHAL_WINDOW_OF4_VECOFS)
94#define INTLEVEL2_VECTOR_VADDR XC_VADDR(XCHAL_INTLEVEL2_VECOFS)
95#define INTLEVEL3_VECTOR_VADDR XC_VADDR(XCHAL_INTLEVEL3_VECOFS)
96#define INTLEVEL4_VECTOR_VADDR XC_VADDR(XCHAL_INTLEVEL4_VECOFS)
97#define INTLEVEL5_VECTOR_VADDR XC_VADDR(XCHAL_INTLEVEL5_VECOFS)
98#define INTLEVEL6_VECTOR_VADDR XC_VADDR(XCHAL_INTLEVEL6_VECOFS)
99
100#define DEBUG_VECTOR_VADDR XC_VADDR(XCHAL_DEBUG_VECOFS)
101
102#define NMI_VECTOR_VADDR XC_VADDR(XCHAL_NMI_VECOFS)
103
104#define INTLEVEL7_VECTOR_VADDR XC_VADDR(XCHAL_INTLEVEL7_VECOFS)
105
106/*
107 * These XCHAL_* #defines from varian/core.h
108 * are not valid to use with V3 MMU. Non-XCHAL
109 * constants are defined above and should be used.
110 */
111#undef XCHAL_VECBASE_RESET_VADDR
112#undef XCHAL_RESET_VECTOR0_VADDR
113#undef XCHAL_USER_VECTOR_VADDR
114#undef XCHAL_KERNEL_VECTOR_VADDR
115#undef XCHAL_DOUBLEEXC_VECTOR_VADDR
116#undef XCHAL_WINDOW_VECTORS_VADDR
117#undef XCHAL_INTLEVEL2_VECTOR_VADDR
118#undef XCHAL_INTLEVEL3_VECTOR_VADDR
119#undef XCHAL_INTLEVEL4_VECTOR_VADDR
120#undef XCHAL_INTLEVEL5_VECTOR_VADDR
121#undef XCHAL_INTLEVEL6_VECTOR_VADDR
122#undef XCHAL_DEBUG_VECTOR_VADDR
123#undef XCHAL_NMI_VECTOR_VADDR
124#undef XCHAL_INTLEVEL7_VECTOR_VADDR
125
126#else
127
128#define USER_VECTOR_VADDR XCHAL_USER_VECTOR_VADDR
129#define KERNEL_VECTOR_VADDR XCHAL_KERNEL_VECTOR_VADDR
130#define DOUBLEEXC_VECTOR_VADDR XCHAL_DOUBLEEXC_VECTOR_VADDR
131#define WINDOW_VECTORS_VADDR XCHAL_WINDOW_VECTORS_VADDR
132#define INTLEVEL2_VECTOR_VADDR XCHAL_INTLEVEL2_VECTOR_VADDR
133#define INTLEVEL3_VECTOR_VADDR XCHAL_INTLEVEL3_VECTOR_VADDR
134#define INTLEVEL4_VECTOR_VADDR XCHAL_INTLEVEL4_VECTOR_VADDR
135#define INTLEVEL5_VECTOR_VADDR XCHAL_INTLEVEL5_VECTOR_VADDR
136#define INTLEVEL6_VECTOR_VADDR XCHAL_INTLEVEL6_VECTOR_VADDR
137#define DEBUG_VECTOR_VADDR XCHAL_DEBUG_VECTOR_VADDR
138
139#endif
140
141#endif /* _XTENSA_VECTORS_H */